JP5773970B2 - Bright spot defect correcting method and manufacturing method for liquid crystal display device - Google Patents

Description

  The present invention relates to a bright spot defect correcting method and a manufacturing method for a liquid crystal display apparatus in which a bright spot defect generated in a pixel of a liquid crystal display device is irradiated with a laser beam to darken the spot.

  In a liquid crystal panel, a defect called a bright spot defect may occur due to contamination of foreign matters in the manufacturing process. A bright spot defect is, for example, a defect that cannot be displayed as a desired color when a dark color such as black is displayed, and is visually recognized as a bright spot. Since these bright spot defects are easily visible to the human eye and are very conspicuous, liquid crystal panels with bright spot defects are often discarded as defective products. It has become.

  As a method for correcting the bright spot defect in such a liquid crystal panel, conventionally, by irradiating the color filter of the part corresponding to the bright spot defective pixel of the liquid crystal panel with a laser beam, the color filter is altered and the light from the backlight is changed. A technique has been proposed in which light is not transmitted and a bright spot defect is darkened to make it inconspicuous (see, for example, Patent Document 1). In this technique, a laser beam shaped into a slit shape is scanned one-dimensionally within a pixel, whereby a color filter is altered to darken a bright spot defect.

Japanese Patent Laying-Open No. 2006-227621 (page 18, line 25 to page 20, line 50, FIGS. 7 to 13)

  In such a dark spot defect darkening method, the object to be irradiated with laser light is a color filter, but the color filter is a relatively thin film having a thickness of several μm or less. An alignment film for controlling the alignment state of the liquid crystal is disposed on the surface of the color filter opposite to the glass substrate. An alignment film is also disposed on the uppermost portion of the thin film transistor array substrate facing the substrate on which the color filter is formed.

  Even when the energy of the laser beam is set to an optimum value for darkening by changing the color filter, when the irradiation and scanning of the laser beam are started, the irradiation position of the laser beam, particularly the laser beam In the vicinity of the irradiation start position, the alignment film may be denatured by heat, and liquid crystal alignment may be disturbed. In addition, the color filter film may be damaged at the start of laser light irradiation, and foreign matter may scatter and adhere to the alignment film of the color filter substrate or the thin film transistor array substrate, thereby causing disturbance in liquid crystal alignment. When such disorder of the liquid crystal alignment occurs, for example, when black is displayed, light passes through the liquid crystal layer in the peripheral pixels of the bright spot defective pixel, which causes a new display defect. May occur.

  The present invention has been made to solve the above-described problems, and reduces display defects that occur around bright pixel defects when laser light is irradiated, and appropriately darkens bright spots. It is an object of the present invention to provide a bright spot defect correcting method and a manufacturing method for a liquid crystal display device.

To achieve the above object, the present invention provides a color filter substrate in which a plurality of color pixels including at least three colors are arranged;
A thin film transistor array substrate in which a plurality of thin film transistors for driving pixel electrodes corresponding to each color pixel are arranged;
In a liquid crystal display device comprising a liquid crystal sealed between the color filter substrate and the thin film transistor array substrate, a laser beam is irradiated toward a bright spot defect pixel having a bright spot defect, and at least the color filter substrate A method for correcting a bright spot defect in a liquid crystal display device in which a part of the liquid crystal display is modified to reduce light transmittance,
Irradiating the laser beam with a spot size smaller than the bright spot defective pixel toward the bright spot defective pixel;
Moving the laser light relative to the liquid crystal display device, and scanning the laser light in the bright spot defective pixels,
In the step of scanning with the laser beam, a pixel having a low relative visibility compared to a color pixel having a high relative visibility among the color pixels adjacent to the bright spot defective pixel in the laser light irradiation start position. It is characterized in that it is set closer to.

The present invention also provides a color filter substrate in which a plurality of color pixels including at least three colors are arranged;
A thin film transistor array substrate in which a plurality of thin film transistors for driving pixel electrodes corresponding to each color pixel are arranged;
In a liquid crystal display device including a liquid crystal sealed between the color filter substrate and the thin film transistor array substrate, a laser beam is irradiated toward a bright spot defect pixel having a bright spot defect, and at least the color filter substrate A method of manufacturing a liquid crystal display device including a step of altering a part to reduce light transmittance and correcting a bright spot defect,
Irradiating the laser beam with a spot size smaller than the bright spot defective pixel toward the bright spot defective pixel;
Moving the laser light relative to the liquid crystal display device, and scanning the laser light in the bright spot defective pixels,
In the step of scanning with the laser beam, a pixel having a low relative visibility compared to a color pixel having a high relative visibility among the color pixels adjacent to the bright spot defective pixel in the laser light irradiation start position. It is characterized in that it is set closer to.

  According to the present invention, even if light leakage due to liquid crystal orientation abnormality occurs in the peripheral pixels of the bright spot pixel after the dark spot darkening process of the bright spot defect by laser light irradiation, a color with low relative visibility is generated. Since light leakage at the pixel is sufficient, display defects newly generated around the bright spot pixel can be made inconspicuous.

It is sectional drawing which shows the liquid crystal module by Embodiment 1 of this invention. It is a block diagram of the bright spot defect blackening device of the liquid crystal display device according to the first embodiment of the present invention. It is a top view which shows an example of the scanning path | route of the laser beam in the pixel which has a luminescent spot defect. It is a top view which shows a mode when the orientation abnormality of a liquid crystal has occurred after irradiation of the laser beam. It is explanatory drawing which shows a photopic standard relative luminous sensitivity curve. It is explanatory drawing which shows the transmission spectrum of the color filter color material in Embodiment 1 of this invention. It is explanatory drawing which shows the scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 1 of this invention. It is explanatory drawing which shows the scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 2 of this invention. It is explanatory drawing which shows the scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 3 of this invention. It is explanatory drawing which shows the scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 4 of this invention. It is explanatory drawing which shows the scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 5 of this invention. It is a top view which shows the color filter of the matrix arrangement | sequence in Embodiment 6 of this invention. It is explanatory drawing which shows the scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 6 of this invention. It is explanatory drawing which shows the scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 7 of this invention. It is explanatory drawing which shows the transmission spectrum of the color filter color material in Embodiment 8 of this invention. It is a top view which shows the color filter of the matrix arrangement | sequence in Embodiment 8 of this invention. It is a figure which shows the scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 8 of this invention. It is explanatory drawing which shows the other scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 8 of this invention. It is explanatory drawing which shows the other scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 8 of this invention. It is explanatory drawing which shows the other scanning path | route of the laser beam and the generation | occurrence | production state of orientation abnormality by Embodiment 8 of this invention.

Embodiment 1 FIG.
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Depending on the drawings, some parts may be exaggerated for easy understanding.

  FIG. 1 is a cross-sectional view of the liquid crystal module 20 according to the first embodiment. As shown in the figure, the liquid crystal module 20 includes a liquid crystal panel 15, a backlight 16, a drive control board 17, and the like. The backlight 16 is disposed on the back side of the liquid crystal panel 15. The backlight 16 and the liquid crystal panel 15 are electrically connected to a drive control board 17 that controls their operation.

  The liquid crystal panel 15 has a structure in which the liquid crystal 1 is sealed between the color filter substrate 13 and the thin film transistor array substrate 14. Hereinafter, the thin film transistor array substrate is referred to as a TFT substrate (TFT: Thin Film Transistor).

  The color filter substrate 13 includes the glass substrate 2, and the color filter 12 is disposed on the surface of the glass substrate 2 on the liquid crystal 1 side. A common electrode 4 for applying a voltage to the liquid crystal 1 is formed on the surface of the color filter 12 on the liquid crystal 1 side, and an alignment for aligning the molecules of the liquid crystal 1 in a predetermined direction on the surface of the common electrode 4. A film 5 is formed. A polarizing plate 3 is disposed on the surface of the glass substrate 2 opposite to the liquid crystal 1.

  The color filter 12 includes a color filter color material 6 that transmits light in a specific wavelength range corresponding to the three primary colors of additive color mixing, red (R), green (G), and blue (B), and the adjacent RGB colors. A black matrix 7 for light shielding is provided between the pixels. As the color filter color material 6, for example, a colored material such as polyimide, acrylic, or epoxy resin is used, and the film thickness is, for example, about 1 μm. Here, the three colors of the color filter color material 6 are arranged such that red (R), green (G), and blue (B) are arranged in order without the same color continuing. The black matrix 7 is a film excellent in light-shielding properties, and a black resin to which carbon is added, a metal chromium film, or the like is used. With a metal chromium film, the film thickness can be reduced to about 0.1 μm.

  The common electrode 4 is for applying a voltage to the liquid crystal 1 and is formed of a transparent conductive film such as ITO (Indium Tin Oxide). The thickness of the common electrode 4 is, for example, about 50 to 150 nm.

  The alignment film 5 is for aligning the molecules of the liquid crystal 1 in a predetermined direction, and is formed of, for example, polyimide. The thickness is about several tens of nm.

  The TFT substrate 14 has a glass substrate 8, and on the surface of the glass substrate 8 on the liquid crystal 1 side, a TFT array 10 for controlling the voltage applied to the liquid crystal 1 in units of each color pixel is formed. An alignment film 11 is formed thereon. A polarizing plate 9 is disposed on the surface of the glass substrate 8 opposite to the liquid crystal 1.

  The TFT array 10 includes a pixel electrode for applying a voltage to the liquid crystal 1 and an array of TFTs for controlling the applied voltage. The drive control board 17 is electrically connected to the TFT array 10.

  As the alignment film 11, the same film as the alignment film 5 on the color filter substrate 13 side is used.

  Next, the backlight 16 will be described. As the backlight 16, for example, a point light source such as a light emitting diode or a fluorescent tube or a surface light source formed by using a line light source and a light guide, a surface light source using an electroluminescence element, or the like is used.

  Next, the drive control board 17 will be described. The drive control board 17 includes a control IC and the like, and drives the liquid crystal 1 by controlling the operation of the TFT array 10 of the liquid crystal panel 15 and also controls the operation of the backlight 16.

  In the liquid crystal module 20 as described above, a bright spot defect may occur in the liquid crystal panel 15 due to contamination of foreign matters during the production of the liquid crystal panel 15. In the present embodiment, the color filter color material formed on the pixel having the bright spot defect among the color filter color materials 6 constituting the liquid crystal panel 15 for the liquid crystal panel 15 in which such a bright spot defect has occurred. By irradiating the laser beam 6 with the laser, the bright spot pixel is darkened, and the bright spot defect on the liquid crystal panel 15 is shielded and made inconspicuous.

  Next, a bright spot defect darkening device for a liquid crystal panel used in the present embodiment will be described below. Here, “darkening a bright spot defect” not only completely blackens a pixel having a bright spot defect but also lowers the light transmittance of the bright spot pixel to some extent to darken the brightness of the pixel. This also includes making it inconspicuous.

  FIG. 2 is a configuration diagram showing the bright spot defect darkening device of the liquid crystal display device according to the first embodiment. The bright spot defect darkening device 50 mainly includes a laser irradiation / observation unit 30, a liquid crystal panel installation unit 40, and the like. The laser irradiation / observation unit 30 has functions of generating, shaping, condensing laser light, and observing the liquid crystal panel 15.

  The liquid crystal panel installation unit 40 has a function of installing the liquid crystal panel 15 to be irradiated with laser light and moving the liquid crystal panel 15 in the X and Y directions perpendicular to each other with respect to the laser irradiation / observation unit 30. Then, by irradiating the laser beam generated by the laser irradiation / observation unit 30 toward the pixel having the bright spot defect of the liquid crystal panel 15 installed in the liquid crystal panel installation unit 40, the bright spot defect of the liquid crystal panel 15 is eliminated. Darken.

  First, the laser irradiation / observation unit 30 will be described. In the laser irradiation / observation unit 30, power is supplied from a laser driving power source 31 to a laser oscillator 32 which is an example of a light source for dark spot defects to generate laser light. As the laser oscillator 32, a semiconductor laser, a solid-state laser, a gas laser, or the like can be used.

  The laser beam emitted from the laser oscillator 32 is shaped by the adjustment optical system 34. The adjustment optical system 34 includes a spherical lens, a cylindrical surface lens, a prism, and the like, and adjusts the laser beam to a beam diameter and a beam divergence angle suitable for dark spots of bright spot defect pixels.

  The laser light adjusted in this way is shaped into the opening shape (for example, circular or rectangular) of the variable opening device 35 when passing through the variable opening device 35. The laser beam shaped into a circle or a rectangle by the variable aperture device 35 is transferred by the laser processing optical system 36 onto the color filter substrate 13 of the liquid crystal panel 15 installed on the XY table 42 with a spot size smaller than the pixels. Is done.

  The shape of the laser spot irradiated on the color filter color material 6 of the liquid crystal panel 15 is determined by the aperture shape of the variable aperture device 35 and the transfer magnification of the laser processing optical system 36. For example, when the aperture shape of the variable aperture device 35 is a circle of φ150 μm and the transfer magnification is 1/50, the laser spot on the liquid crystal panel 15 is a circle of φ3 μm. The size of the laser spot depends on the type of the liquid crystal panel 15 and the type of the color filter color material 6 by adjusting the aperture shape of the variable aperture device 35 as a processing parameter or changing the transfer magnification of the laser processing optical system 36. Can be optimized. If the size of the laser spot is too large, the color filter color material 6 does not darken and the probability of damaging the color filter substrate 13 increases. On the other hand, if the size of the laser spot is too small, a blackening level sufficient for shielding the bright spot defect cannot be obtained. According to the experiments by the present inventor, although it depends on the pixel size of the liquid crystal panel 15, it has been found that in general, a circular laser spot having a size of φ3 μm to φ5 μm is appropriate.

  The laser irradiation / observation unit 30 is provided with a Z stage 33 for focusing on the liquid crystal panel 15 when irradiating a laser beam for dark spot generation of a bright spot defect or when observing the liquid crystal panel 15. ing. The Z stage 33 is capable of adjusting the distance between the laser irradiation / observation unit 30 and the liquid crystal panel 15, and moves the laser irradiation / observation unit 30 in the vertical direction in FIG. Adjust the focus of light or light for observation.

  When the size of the laser spot in the color filter color material 6 of the liquid crystal panel 15 is as small as several μm, for example, when the distance between the laser processing optical system 36 and the liquid crystal panel 15 varies due to the inclination of the liquid crystal panel 15 or the like. The shape of the laser spot in the filter color material 6 changes, and laser processing becomes unstable. Therefore, for stable processing, the distance between the laser processing optical system 36 and the liquid crystal panel 15 is estimated by image processing or the like, and the Z stage 33 is automatically controlled based on this distance, and laser processing optics. It is effective to keep the distance between the system 36 and the liquid crystal panel 15 constant.

  For this reason, in the present embodiment, the camera 37 is provided in the laser processing optical system 36 so that the state of the liquid crystal panel 15 at the time of laser irradiation can be observed. Even if such an observation camera 37 is omitted, dark spot processing by laser irradiation is possible, but it is desirable to install it for positioning of the processing target pixel.

  Next, the liquid crystal panel installation unit 40 will be described. The liquid crystal panel installation unit 40 includes an XY table 42, an observation light source 43, a drive control device 41, and the like.

  The XY table 42 is provided with the liquid crystal panel 15 on the upper surface thereof, and can move in two directions substantially orthogonal to each other in a plane substantially perpendicular to the laser light incident on the liquid crystal panel 15. Thereby, a laser beam can be irradiated to an arbitrary place on the liquid crystal panel 15. The XY table 42 is provided with a transmission hole 42a so that light emitted from the observation light source 43 installed on the back side of the XY table 42 is irradiated to the liquid crystal panel 15 through the transmission hole 42a. Thus, the image can be observed by a camera 37 provided in the laser processing optical system 36 of the laser irradiation / observation unit 30. As the observation light source 43, for example, a light emitting diode or a lamp can be used, and it is preferable that a lens for condensing the light emitted from the observation light source 43 is also provided.

  The drive control device 41 is electrically connected to the liquid crystal panel 15 and drives the liquid crystal 1 by controlling the operation of the TFT array 10 of the liquid crystal panel 15. Since the function of the drive control device 41 is basically the same as that of the drive control board 17 of the liquid crystal module 20, instead of providing the drive control device 41 in the bright spot defect blackening device 50 of the liquid crystal display device, the liquid crystal module Twenty drive control boards 17 may be used.

  When observing the liquid crystal panel 15, it is preferable to operate the liquid crystal panel 15 by the drive control device 41 to display all black. By making all black display, the part other than the bright spot defect is displayed in black, while in the bright spot defect part, the observation light emitted from the observation light source 43 leaks and becomes a bright spot, which is identified as a bright spot defect. It becomes easy to do.

  A method for darkening a bright spot defect of a liquid crystal display device using the bright spot defect darkening apparatus 50 configured as described above will be described in detail below.

  First, the liquid crystal panel 15 is set on the XY table 42. Here, the liquid crystal panel 15 is installed on the transmission hole 42 a of the XY table 42 so that the observation light emitted from the observation light source 43 is irradiated to the liquid crystal panel 15.

  Next, the drive control device 41 and the liquid crystal panel 15 are connected, and an all black display signal is sent from the drive control device 41 to the liquid crystal panel 15 to place the liquid crystal panel 15 in the all black display state. Then, the observation light source 43 emits observation light to the liquid crystal panel 15, and the light leaking from the liquid crystal panel 15 is received by the camera 37 to observe the bright spot defect of the liquid crystal panel 15.

  It is to be noted that a bright spot defect is discovered by an inspection process in the previous process of the dark spot processing, and the location (address) of the found bright spot defect is transferred to the bright spot defect dark spot device 50, so that the bright spot defect pixel is detected. It is also possible to efficiently perform the positioning.

  After the positioning of the liquid crystal panel 15 so that the pixels having the bright spot defects can be irradiated with the laser by moving the XY table 42, the pixels having the bright spot defects are irradiated with the laser light. At this time, the laser light emitted from the laser oscillator 32 is shaped and condensed through the adjustment optical system 34, the variable aperture device 35, and the processing optical system 36, and the liquid crystal panel 15 has a spot size smaller than that of the pixel having the bright spot defect. Irradiation is performed on a pixel having a bright spot defect. Thereby, a part of the color filter substrate 13 is altered, and the light transmittance is lowered, thereby darkening the bright spot defect.

  Here, “part of the color filter substrate 13” refers to a component constituting the color filter substrate 13, for example, the alignment film 5, the common electrode 4, the color filter color material 6, the glass substrate 2, and the polarizing plate 3. One of them. All of these need not be altered, and at least one of them may be altered to reduce the light transmittance.

  Next, a process of scanning a laser beam in a pixel having a bright spot defect will be described. FIG. 3 is a top view showing an example of a scanning path of laser light during dark spot processing.

  The pixels of the liquid crystal panel 15 have, for example, a rectangular shape with a side of several tens of μm to several hundreds of μm or a shape close to a rectangular shape. As shown in FIG. 3, in the step of darkening a bright spot defect, the entire pixel 60 having a bright spot defect with a spot size smaller than the pixel 60 having a bright spot defect, for example, a spot size of several μm is formed without a gap. In order to darken, it is necessary to scan the laser beam within the pixel. The laser beam scanning is performed by moving the XY table 42 on which the liquid crystal panel 15 is installed.

  The laser beam scanning path shown in FIG. 3 will be described. After the laser beam processing start point 64 is set in the vicinity of the corner of the bright spot defect pixel 60, the laser beam is reciprocally scanned in a zigzag manner from the processing start point 64 along the scanning path 63 shown in FIG. The scanning is terminated when a processing end point 65 set near a corner different from the corner near the processing start point 64, preferably in the vicinity of the corner located diagonally, is reached.

  Here, the object to be darkened by laser light irradiation is the color filter color material 6, and the energy of the laser light is set to an optimal value for changing the color filter color material 6 to darken it. Yes. However, the color filter color material 6 is a thin film having a thickness of several μm or less. As shown in FIG. 1, the common electrode 4 and the orientation are arranged on the surface of the color filter color material 6 opposite to the glass substrate 2. A membrane 5 is arranged.

  For this reason, when laser light is irradiated, not only the color filter colorant 6 but also the common electrode 4 and the alignment film 5 may be altered by heat in the vicinity of the irradiation position. May occur. Further, the film of the color filter color material 6 is damaged by the laser light irradiation, and foreign matters are scattered and adhered to the alignment film 5 of the color filter substrate 13 or the alignment film 11 of the TFT substrate 14, thereby disturbing the alignment of the liquid crystal. May cause.

  According to the observation by the present inventor, it has been found that such alteration or breakage of the color filter coloring material 6 or the alignment films 5 and 11 is likely to occur particularly near the irradiation start position of the laser beam. This is presumably because stress is applied to the thin film because the thin film is rapidly heated and rapidly expands during laser light irradiation.

  FIG. 4 is a top view showing a state in which a liquid crystal alignment abnormality occurs after laser light irradiation. The bright spot defect pixel 60 is scanned with laser light as described in FIG. That is, laser irradiation is started at the processing start point 64 at the corner of the bright spot defect pixel 60, the laser light is scanned in a zigzag manner along the scanning path 63, and processing ends at a corner different from the processing start point 64. Scanning is completed at point 65. At this time, an alignment error of the liquid crystal occurs in the adjacent pixels 61 and 62 arranged on both sides of the bright spot defective pixel 60 that has been irradiated with the laser, and light is transmitted in the alignment error region 66 when black is displayed. Will penetrate the layer. As a result, even if the bright spot defective pixel 60 itself becomes a dark spot, a new display defect occurs in which the peripheral portion of the bright spot defective pixel 60 appears to shine.

  Here, the abnormal alignment region 66 hardly extends to the upper and lower pixels beyond the wide black matrix 7 formed above and below the bright spot defect pixel 60 in FIG. 4 is seen to extend to the adjacent pixels 61 and 62 beyond the narrow black matrix 7 formed on both the left and right sides in FIG. In addition, it does not spread evenly to the adjacent pixels 61 and 62 on both sides, but the orientation abnormal region 66 spreads over a wider range, particularly in the adjacent pixel 61 on the side near the laser beam processing start point 64 in the bright spot defective pixel 60. Is seen.

  In the first embodiment, in order to make the newly generated display defect inconspicuous as described above, the position of the laser beam processing start point is determined in consideration of the color of the pixel adjacent to the bright spot defective pixel. It has been devised.

  Next, a method for determining the position of the laser beam processing start point in the bright spot defective pixel will be described in detail below.

  A case where the color of the color filter color material 6 formed in the bright spot defective pixel 60 is red (R) in FIG. 4 will be described. The color filter color material 6 used in the first embodiment is made of red (R), green (G), and blue (B), and is formed in order so that the same colors do not continue. When the defective pixel 60 is R, one of the pixels 61 and 62 on both sides is G and the other is B. For example, here, when the adjacent pixel 61 is G and the adjacent pixel 62 is B, the spread of the alignment abnormal region 66 is larger in the adjacent pixel 61 where the processing start point 64 is closer, so that the liquid crystal The light leakage due to the orientation abnormality is larger in the adjacent pixel 61 than in the adjacent pixel 62, and the G light is emitted from a wider range than the B light.

  By the way, it is known that the human eye can feel light with a wavelength of 380 to 780 nm, but the sensitivity to the light of the human eye varies depending on the wavelength of the light. The sense of eyes by this wavelength is called visibility, and it is said that the light near 555 nm is felt most strongly in a bright place and the light near 507 nm is felt most intense in a dark place. FIG. 5 shows a photopic standard relative luminous sensitivity curve. This is the degree to which the human eye perceives the brightness at other wavelengths with the intensity at which the human eye feels the maximum sensitivity when adapting to a bright place. Is represented by a number of 1 or less so as to be the ratio.

  FIG. 6 shows transmission spectra of R, G, and B of the color filter color material 6 used in the first embodiment. As apparent from a comparison between FIG. 5 and FIG. 6, G of the color filter color material 6 has a transmission spectrum peak at a wavelength of about 540 nm, and has a very high relative visibility. In comparison, B of the color filter color material 6 has a transmission spectrum peak at a wavelength of about 460 nm and a relatively low relative visibility. The relative luminous sensitivity of R having a peak wavelength of 600 nm or more is an intermediate level between G and B.

  That is, as described above, when the bright spot defective pixel 60 in FIG. 4 is R, the adjacent pixel 61 is arranged to be G and the adjacent pixel 62 is set to B so that the adjacent pixel 61 in the bright spot defective pixel 60 is arranged. When laser light is irradiated with the near corner set as the processing start point 64, G light with very high specific sensitivity is emitted from a wide range, and it is visually recognized as a noticeable display defect. .

  Therefore, in the first embodiment, the position of the processing start point by the laser light is set so that the region where light with high specific visibility is emitted is reduced.

  FIG. 7 shows the scanning path of the laser beam and the state of occurrence of alignment abnormality in the first embodiment. In particular, FIG. 7A shows a case where the color filter color material 6 formed in the bright spot defective pixel 60 is R. In FIG. 7A, the color filter color material 6 of the bright spot defective pixel 60 is R, the color of the color filter color material 6 of one adjacent pixel 61 is G, and the color filter of the other adjacent pixel 62. The color of the color material 6 is B. Comparing the relative luminous sensitivities of the colors of the adjacent pixels with reference to the standard specific luminosity curve of FIG. 5 and the transmission spectrum of the color filter of FIG. 6, the G of the adjacent pixel 61 has a higher specific visibility, and the adjacent pixel 62 B is lower. Therefore, in the bright spot defective pixel 60 to be darkened, the laser irradiation is started by setting the processing start point 64 at the corner portion close to the adjacent pixel 62 having the lower relative visibility, which is shown in FIG. As described above, the laser beam is reciprocated in a zigzag manner without a gap along the scanning path 63 that combines the main scanning in the X direction and the sub scanning in the Y direction, and a corner portion different from the processing start point 64 of the bright spot defective pixel 60. The scanning is terminated when the processing end point 65 set in (1) is reached. The scanning speed at this time is 40 μm / s, for example.

  When scanning is performed in this manner, the processing start point 64 of the laser beam is close to the adjacent pixel 62, so that the liquid crystal alignment abnormal region 66 is generated in the adjacent pixel 62 wider than the adjacent pixel 61. Therefore, the B light that is the color of the color filter color material 6 formed in the adjacent pixel 62 is emitted from a wide range, and the G leakage light from the adjacent pixel 61 is small. As a result, it is possible to make the display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 60 is irradiated with laser light to darken.

  FIG. 7B shows a case where the color filter color material 6 formed on the bright spot defective pixel 60 is G. In this case, the color of the bright spot defective pixel 60 is G, the color of the adjacent pixel 61 is B, and the color of the adjacent pixel 62 is R. Comparing the relative luminous sensitivities of the colors of the adjacent pixels 61 and 62, the R of the adjacent pixel 62 has a higher specific visual sensitivity and the B of the adjacent pixel 61 is lower. Accordingly, in the luminescent spot defective pixel 60 to be darkened, the processing start point 64 is set at a corner near the adjacent pixel 61 having a lower relative visibility, and laser irradiation is started, and the laser is started along the scanning path 63. Scanning is terminated when light is scanned and a processing end point 65 set at a corner different from the processing start point 64 of the bright spot defective pixel 60 is reached.

  When scanning is performed in this manner, the processing start point 64 of the laser beam is close to the adjacent pixel 61, so that the liquid crystal alignment abnormal region 66 is generated in the adjacent pixel 61 wider than the adjacent pixel 62. Therefore, B light, which is the color of the color filter color material 6 of the adjacent pixel 61, is emitted from a wide range, and R leakage light from the adjacent pixel 62 is small. As a result, it is possible to make the display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 60 is irradiated with laser light to darken.

  FIG. 7C shows the case where the color filter color material 6 formed on the bright spot defective pixel 60 is B. In this case, the color of the bright spot defective pixel 60 is B, the color of the adjacent pixel 61 is R, and the color of the adjacent pixel 62 is G. Comparing the relative luminous sensitivities of the colors of the adjacent pixels 61 and 62, the G of the adjacent pixel 62 has a higher specific visual sensitivity and the R of the adjacent pixel 61 is lower. Accordingly, in the luminescent spot defective pixel 60 to be darkened, the processing start point 64 is set at a corner near the adjacent pixel 61 having a lower relative visibility, and laser irradiation is started, and the laser is started along the scanning path 63. Scanning is terminated when light is scanned and a processing end point 65 set at a corner different from the processing start point 64 of the bright spot defective pixel 60 is reached.

  When scanning is performed in this manner, the processing start point 64 of the laser beam is close to the adjacent pixel 61, so that the liquid crystal alignment abnormal region 66 is generated in the adjacent pixel 61 wider than the adjacent pixel 62. Therefore, R light, which is the color of the color filter color material 6 of the adjacent pixel 61, is emitted from a wide range, and G leakage light from the adjacent pixel 62 is small. As a result, it is possible to make the display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 60 is irradiated with laser light to darken.

  Although the color filter color materials are three colors of R, G, and B here, colors other than R, G, and B may be used. Moreover, not only three colors but four or more colors including yellow (Y) may be used. In any case, the color of the pixel adjacent to the bright spot defective pixel is compared, and the irradiation start position of the laser beam is set at a corner closer to the pixel having a color with low relative visibility, thereby implementing the above-described implementation. The same effect as the form can be obtained.

  As described above, according to the first embodiment, when the bright spot defective pixel is darkened by irradiating the laser beam, the irradiation start position of the laser beam is set to the pixel adjacent to the bright spot defective pixel. By setting the corner closer to the pixel with low specific visibility, the defective display around the bright spot defective pixel is made inconspicuous when the bright spot defective pixel is corrected by laser light irradiation. Can do.

Embodiment 2. FIG.
FIG. 8 is a top view illustrating the scanning path of the laser beam and the state when the alignment abnormality of the liquid crystal occurs after the laser beam irradiation in the second embodiment.

  In FIG. 8, a case will be described in which the color of the color filter color material 6 formed on the bright spot defective pixel 60 is R, the color of the adjacent pixel 61 is G, and the color of the adjacent pixel 62 is B.

  Comparing the relative luminous sensitivities of the colors of the adjacent pixels 61 and 62, the G of the adjacent pixel 61 has a higher specific visual sensitivity and the B of the adjacent pixel 62 is lower. Therefore, in the bright spot defective pixel 60 to be darkened, the processing start point 74 is set at a corner close to the adjacent pixel 62 having a lower relative visibility, and laser irradiation is started. As shown in FIG. 8, along the outer peripheral portion, spirally from the outer peripheral portion of the bright spot defective pixel 60 toward the inside, like a scanning path 73 that combines the main scanning in the X direction and the main scanning in the Y direction. The laser beam is scanned, and the scanning is terminated when the processing end point 75 set at substantially the center of the bright spot defective pixel 60 is reached.

  When scanning is performed in this way, the processing start point 74 of the laser beam is close to the adjacent pixel 62, so that the liquid crystal alignment abnormal region 66 is generated in the adjacent pixel 62 more widely than the adjacent pixel 61. Therefore, the B light that is the color of the color filter color material 6 formed in the adjacent pixel 62 is emitted from a wide range, and the G leakage light from the adjacent pixel 61 is small. As a result, it is possible to make the display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 60 is irradiated with laser light to darken.

  Further, FIG. 8 illustrates the case where the color of the color filter color material 6 formed on the bright spot defective pixel 60 is R. However, when the color of the bright spot defective pixel 60 is G, adjacent R and B A processing start point 74 is set at a corner close to the B pixel having a low relative visibility among the pixels, and the laser beam is irradiated, and the laser beam is scanned along the spiral scanning path 73.

  Further, when the color of the bright spot defective pixel 60 is B, a processing start point 74 is set at a corner portion close to an R pixel having a low relative visibility among adjacent R and G pixels, and laser light is irradiated. Then, the laser beam is scanned along the spiral scanning path 73.

  In this way, by setting the laser beam processing start point 74 at a corner close to a pixel having a low relative visibility among adjacent pixels, the bright spot defect pixel 60 is irradiated with the laser beam to darken. In this case, display defects occurring in the peripheral portion can be made inconspicuous.

Embodiment 3 FIG.
FIG. 9 is a top view illustrating the scanning path of the laser beam and the state when the alignment abnormality of the liquid crystal occurs after the laser beam irradiation in the third embodiment.

  In FIG. 9, the case where the color of the color filter color material 6 formed in the bright spot defective pixel 60 is R, the color of the adjacent pixel 61 is G, and the color of the adjacent pixel 62 is B will be described.

  Comparing the relative luminous sensitivities of the colors of the adjacent pixels 61 and 62, the G of the adjacent pixel 61 has a higher specific visual sensitivity and the B of the adjacent pixel 62 is lower. Therefore, in the bright spot defective pixel 60 to be darkened, a processing start point 84 is set at a corner near the adjacent pixel 62 having a lower specific visibility, laser irradiation is started, and the first processing end point 86 is set. Until the first machining end point 86 is reached, the laser irradiation is stopped. Thereafter, the XY table 42 is driven to move to the second machining start point 87 in the X direction. Laser irradiation is started from the second machining start point 87, and this time, scanning is performed in the -Y direction, and the laser irradiation is stopped when the second machining end point 88 is reached. Thereafter, the XY table 42 is driven to move to the third machining start point 89 in the X direction. By repeating this operation, the entire bright spot defective pixel 60 is darkened, and the darkening is completed when the scanning is completed up to the processing end point 85.

  In FIG. 9, the scanning path 83 is not continuous from the first machining start point 84 to the last machining end point 85. This is because, when the XY stage 42 is stopped at a location where the scanning direction is changed, the changed location is irradiated with laser light for a relatively long time. Therefore, laser irradiation is turned on and off for the purpose of preventing this. However, reciprocal scanning is performed as shown in FIG. In this way, a plurality of machining start points are set. For example, when laser irradiation is stopped at the first machining end point 86 and moved to the second machining start point 87 to start laser irradiation. The peripheral color filter 12 and the alignment film 5 are already heated to some extent by the first laser irradiation, and are not heated suddenly by the start of the second laser irradiation. The misalignment region 66 hardly spreads from the base point.

  In addition, after the completion of the first laser irradiation, laser irradiation with a portion far from the first processing end point 86 and hardly affected by the laser irradiation as the second processing start point 87 is a new laser. Since the same effect as that of irradiation is exerted on the color filter 12 and the alignment film 5, it is not preferable.

  In FIG. 9, a discontinuous scanning path is taken in consideration of the point that the laser irradiation time becomes longer at the position where the scanning direction is changed as described above, but the laser irradiation time is optimized by laser power optimization or the like. As long as the trouble due to the lengthening can be avoided, there is no problem even if the scanning path 83 in the third embodiment is continuous from the machining start point 84 to the machining end point 85.

  Further, FIG. 9 illustrates the case where the color of the color filter color material 6 formed on the bright spot defective pixel 60 is R. However, when the color of the bright spot defective pixel 60 is G, the adjacent R and B The first processing start point 84 is set at a corner portion close to the B pixel having a low relative visibility among these pixels, the laser beam is irradiated, and the laser beam is scanned along the scanning path 83.

  Further, when the color of the bright spot defective pixel 60 is B, the first processing start point 84 is set at a corner near the R pixel having a low relative visibility among the adjacent R and G pixels, and the laser beam. , And the laser beam is scanned along the scanning path 83.

  In this way, by setting the laser beam processing start point 84 at a corner close to a pixel having a low relative visibility among adjacent pixels, the bright spot defect pixel 60 is irradiated with the laser beam to darken. In this case, display defects occurring in the peripheral portion can be made inconspicuous.

Embodiment 4 FIG.
FIG. 10 is a top view illustrating the scanning path of the laser beam and the state when the alignment abnormality of the liquid crystal occurs after the laser beam irradiation in the fourth embodiment.

  In FIG. 10, the case where the color of the color filter color material 6 formed on the bright spot defective pixel 60 is R, the color of the adjacent pixel 61 is G, and the color of the adjacent pixel 62 is B will be described.

  Comparing the relative luminous sensitivities of the colors of the adjacent pixels 61 and 62, the G of the adjacent pixel 61 has a higher specific visual sensitivity and the B of the adjacent pixel 62 is lower. Therefore, in the luminescent spot defective pixel 60 to be darkened, the processing start point 94 is set near the center of the outer peripheral portion in contact with the adjacent pixel 62 having a lower specific visibility, and laser irradiation is started, and the high specific visibility is obtained. A laser beam is scanned in the Y direction toward the adjacent pixel 61, and half of the bright spot defective pixels 60 are reciprocally scanned in a zigzag manner along a scanning path 93 that combines the main scanning in the Y direction and the sub scanning in the X direction. Subsequently, scanning is performed in the X direction along the outer peripheral portion of the pixel 60, and the other half of the pixel 60 is scanned back and forth in a zigzag manner, and the scanning ends when the processing end point 95 set near the outer peripheral portion center is reached. To do.

  When scanning is performed in this manner, the processing start point 94 of the laser beam is close to the adjacent pixel 62, so that the liquid crystal alignment abnormal region 66 is generated in the adjacent pixel 62 more widely than the adjacent pixel 61. Therefore, the B light that is the color of the color filter color material 6 formed in the adjacent pixel 62 is emitted from a wide range, and the G leakage light from the adjacent pixel 61 is small. As a result, it is possible to make the display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 60 is irradiated with laser light to darken.

  FIG. 10 illustrates the case where the color of the color filter color material 6 formed on the bright spot defective pixel 60 is R. However, when the color of the bright spot defective pixel 60 is G, adjacent R and B A processing start point 94 is set near the center of the outer periphery near the B pixel having a low relative visibility among the pixels, and the laser beam is irradiated, and the laser beam is scanned along the scanning path 93.

  When the color of the bright spot defective pixel 60 is B, a processing start point 94 is set near the center of the outer periphery near the R pixel having a low relative visibility among the adjacent R and G pixels, and the laser beam , And the laser beam is scanned along the scanning path 93.

  In this way, by setting the laser beam processing start point 94 near the center of the outer periphery near the color pixel having a low relative visibility among adjacent pixels, the bright spot defect pixel 60 is irradiated with the laser beam and darkened. It is possible to make the display defect occurring in the peripheral portion inconspicuous when the dot is formed.

Embodiment 5 FIG.
FIG. 11 is a top view showing the scanning path of the laser beam and the state when the alignment abnormality of the liquid crystal occurs after the laser beam irradiation in the fifth embodiment.

  In FIG. 11, the case where the color of the color filter color material 6 formed in the bright spot defective pixel 60 is R, the color of the adjacent pixel 61 is G, and the color of the adjacent pixel 62 is B will be described.

  Comparing the relative luminous sensitivities of the colors of the adjacent pixels 61 and 62, the G of the adjacent pixel 61 has a higher specific visual sensitivity and the B of the adjacent pixel 62 is lower. Therefore, in the bright spot defective pixel 60 to be darkened, the processing start point 104 is set at a corner near the adjacent pixel 62 having a lower relative visibility, and laser irradiation is started, as shown in FIG. The laser beam is reciprocated in a zigzag manner toward the diagonal corner of the processing start point 104 along the scanning path 103 that combines the main scanning inclined with respect to the X direction and the Y direction. The scanning is finished when the processing end point 105 set at the corner close to is reached.

  When scanning is performed in this manner, the processing start point 104 of the laser beam is close to the adjacent pixel 62, so that the liquid crystal alignment abnormal region 66 is generated in the adjacent pixel 62 wider than the adjacent pixel 61. Therefore, the B light that is the color of the color filter color material 6 formed in the adjacent pixel 62 is emitted from a wide range, and the G leakage light from the adjacent pixel 61 is small. As a result, it is possible to make the display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 60 is irradiated with laser light to darken.

  Further, FIG. 11 illustrates the case where the color of the color filter color material 6 formed on the bright spot defective pixel 60 is R. However, when the color of the bright spot defective pixel 60 is G, adjacent R and B A processing start point 104 is set at a corner portion close to the B pixel having a low relative visibility among the pixels, the laser beam is irradiated, and the laser beam is scanned along the scanning path 103.

  Further, when the color of the bright spot defective pixel 60 is B, the processing start point 104 is set at a corner portion close to the R pixel having a low relative visibility among the adjacent R and G pixels, and the laser beam is irradiated. Then, the laser beam is scanned along the scanning path 103.

  In this way, by setting the laser beam processing start point 104 at a corner close to a pixel having a low relative visibility among adjacent pixels, the bright spot defect pixel 60 is irradiated with the laser beam to darken. In this case, display defects occurring in the peripheral portion can be made inconspicuous.

Embodiment 6 FIG.
In some color filter arrangements of liquid crystal displays, R, G, and B color filter color materials are arranged in a mosaic pattern in a matrix (field shape).

  FIG. 12 is a top view of the matrix-arranged color filter 12 used in the liquid crystal module according to the sixth embodiment. The pixels on which the R, G, and B color filter color materials 6 are formed are partitioned by a black matrix 7. In the figure, the case where the pixel on which the R color filter color material 6 is formed is the bright spot defective pixel 200 will be described in detail below.

  FIG. 13 is a top view showing a scanning path of laser light in the bright spot defective pixel 200 and a liquid crystal alignment abnormality occurring in the peripheral pixels.

  Comparing the relative luminous sensitivities of the colors of the color filter color material 6 formed on the four pixels 201, 202, 207, 208 adjacent to the bright spot defective pixel 200 on the side, the G of the right adjacent pixel 202 and the upper adjacent pixel 207 are compared. Is high in relative visibility, and B of the left adjacent pixel 201 and the lower adjacent pixel 208 is low. Therefore, in the luminescent spot defective pixel 200 to be darkened, the processing start point 204 is set at the corners close to the adjacent pixel 201 and the adjacent pixel 208 with low specific visibility, and laser irradiation is started, as shown in FIG. The laser beam is reciprocally scanned in a zigzag manner along the scanning path 203 without gaps, and the scanning is terminated when a processing end point 205 set at a corner different from the processing start point 204 of the bright spot defective pixel 200 is reached.

  When scanning is performed in this manner, the laser beam processing start point 204 is set at a position closer to the adjacent pixel 201 and the adjacent pixel 208, so that the liquid crystal orientation abnormality region 206 is adjacent to the adjacent pixel 202 and the adjacent pixel 207. 201 and the adjacent pixel 208 occur widely. Therefore, B light, which is the color of the color filter color material 6 formed in the adjacent pixel 201 and the adjacent pixel 208, is emitted from a wide range, and G leakage light from the adjacent pixel 202 and the adjacent pixel 207 is small. As a result, it is possible to make a display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 200 is irradiated with laser light to darken.

  Further, FIG. 13 illustrates the case where the color of the color filter color material 6 formed on the bright spot defective pixel 200 is R. However, when the color of the bright spot defective pixel 200 is G, there are four adjacent edges on the side. The pixels are two pixels indicating R and two pixels indicating B. Therefore, a processing start point 204 is set at a corner portion close to two pixels indicating B having a low relative visibility among R and B, and laser light is irradiated, and the laser light is scanned along the scanning path 203.

  In addition, when the color of the bright spot defective pixel 200 is B, a processing start point 204 is set at a corner portion close to two pixels showing R having low relative visibility among adjacent R and G pixels, and laser light is emitted. , And the laser beam is scanned along the scanning path 203.

  In this way, by setting the laser beam processing start point 204 at a corner portion close to two pixels having a low relative visibility among adjacent pixels, the luminescent spot defective pixel 200 is irradiated with the laser beam to be a dark spot. The display defect that occurs in the peripheral portion when it is made inconspicuous can be made inconspicuous.

Embodiment 7 FIG.
FIG. 14 is a top view showing the scanning path of the laser beam to the bright spot defective pixel 200 and the state of liquid crystal orientation abnormality occurring in the peripheral pixels in the seventh embodiment.

  Comparing the relative luminous sensitivities of the colors of the color filter color material 6 formed on the four pixels 201, 202, 207, 208 adjacent to the bright spot defective pixel 200 on the side, the G of the right adjacent pixel 202 and the upper adjacent pixel 207 are compared. Is high in relative visibility, and B of the left adjacent pixel 201 and the lower adjacent pixel 208 is low. Therefore, in the bright spot defective pixel 200 to be darkened, a position away from the corner of the bright spot defective pixel 200 in the outer peripheral part contacting the adjacent pixel 201 with low specific visibility, for example, the outer peripheral part in contact with the adjacent pixel 201 A processing start point 214 is set near the center, and the inside of the bright spot defective pixel 200 is scanned in a zigzag manner or along the outer periphery along the scanning path 213 shown in FIG. When the end point 215 is reached, the scanning is finished.

  When scanning is performed in this way, the processing start point 214 of the laser beam is close to the adjacent pixel 201, so that the liquid crystal alignment abnormal region 206 is located in the adjacent pixel 201 rather than the adjacent pixel 202, the adjacent pixel 207, and the adjacent pixel 208. It occurs widely. Therefore, B light, which is the color of the color filter color material 6 formed in the adjacent pixel 201, is emitted from a wide range, and G leakage light with high relative visibility from the adjacent pixel 202 and the adjacent pixel 207 is small. As a result, it is possible to make a display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 200 is irradiated with laser light to darken.

  In FIG. 14, the case where the color of the color filter color material 6 formed on the bright spot defective pixel 200 is R has been described. However, when the color of the bright spot defective pixel 200 is G, there are four adjacent edges on the side. The pixels are two pixels indicating R and two pixels indicating B. Therefore, the processing start point 214 is set at a position away from the corner of the bright spot defective pixel 200 in the outer peripheral portion in contact with the pixel indicating B having a low relative visibility among R and B, and the laser beam is irradiated to scan the scanning path. A laser beam is scanned along 213.

  Further, when the color of the bright spot defective pixel 200 is B, the four pixels adjacent on the side are two pixels indicating R and two pixels indicating G. Therefore, the processing start point 214 is set at a position away from the corner of the bright spot defective pixel 200 in the outer peripheral portion in contact with the pixel indicating R, which has low relative visibility among R and G, and the laser beam is applied to the scanning path. A laser beam is scanned along 213.

  In this way, the laser beam processing start point 214 in the bright spot defective pixel 200 is positioned away from the corner portion of the outer peripheral portion in contact with the adjacent pixel having a low relative visibility, for example, the center of the outer peripheral portion in contact with the adjacent pixel. By setting it in the vicinity, it is possible to make the display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 200 is irradiated with laser light and darkened.

  In the seventh embodiment, since the processing start point 214 is set at a position away from the corner of the bright spot defect pixel 200, the bright spot is compared to when the processing start point 214 is set at the corner. An orientation abnormality in the pixel 209 or 210 adjacent to the defective pixel 200 in the oblique direction can be suppressed.

Embodiment 8 FIG.
Some liquid crystal displays use four color filter color materials in which yellow (Y) or the like is added to conventional R, G, B color materials in order to expand the color reproduction region.

  FIG. 15 shows the R, G, B, and Y transmission spectra of the color filter color material 6 used in the eighth embodiment. Y of the color filter color material 6 exhibits high transmittance in the wavelength range of 500 nm or more, and as is apparent from the standard relative luminous sensitivity curve of FIG.

  FIG. 16 is a top view of the color filter 12 in which the four colors R, G, B, and Y used in the liquid crystal module according to the eighth embodiment are arranged in a matrix (field shape). The pixels on which the R, G, B, and Y color filter color materials 6 are formed are partitioned by a black matrix 7. In the figure, the case where the pixel on which the R color filter color material 6 is formed is the bright spot defective pixel 200 will be described in detail below.

  FIG. 17 is a top view showing the scanning path of the laser light in the bright spot defective pixel 200 and the state of liquid crystal alignment abnormality occurring in the peripheral pixels.

  When the relative luminous sensitivities of the colors of the color filter color material 6 formed in the four pixels 201, 202, 207, 208 adjacent to the bright spot defective pixel 200 on the side are compared, Y of the left adjacent pixel 201 has a relative luminous sensitivity. Next, the right adjacent pixel 202 has the highest G, and the upper adjacent pixel 207 and the lower adjacent pixel 208 B have the lowest relative visibility. Therefore, in the bright spot defective pixel 200 to be darkened, a processing start point 224 is set at a corner portion adjacent to the adjacent pixel 208 having the lowest specific visibility and the adjacent pixel 202 having the second lowest specific visibility, and laser irradiation is performed. 17, the laser beam is reciprocated in a zigzag pattern without any gap along the scanning path 223 shown in FIG. 17, and reaches a processing end point 225 set at a corner different from the processing start point 224 of the bright spot defective pixel 200. At this point, the scanning is finished.

  When scanning is performed in this manner, the processing start point 224 of the laser beam is set at a position closer to the adjacent pixel 208 and the adjacent pixel 202, so that the liquid crystal orientation abnormal region 206 is adjacent to the adjacent pixel 201 and the adjacent pixel 207. 208 and adjacent pixels 202 occur widely. Therefore, the light of B and G, which are the colors of the color filter color material 6 formed in the adjacent pixel 208 and the adjacent pixel 202, is emitted from a wide range, and the leakage light of Y with high relative visibility from the adjacent pixel 201 is small. . As a result, it is possible to make a display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 200 is irradiated with laser light to darken.

  Here, the processing start point 224 is set to the corner that touches the adjacent pixel 208 and the adjacent pixel 202. However, the processing start point 224 is set to the corner that touches the adjacent pixel 202 and the other adjacent pixel 207 that shows B having the lowest specific visibility. Even if the machining start point 224 is set, the same effect can be obtained.

  Similarly, the case where the color of the color filter color material 6 formed on the bright spot defective pixel 200 is B will be described with reference to FIG.

  As shown in FIG. 18, when the bright spot defective pixel 200 is B, the color of the adjacent pixel is Y, the adjacent pixel 202 is Y, and the relative luminous sensitivity is the highest, and then the G of the adjacent pixel 201 is the lowest. It becomes R of the adjacent pixel 207 and the adjacent pixel 208. Therefore, in the bright spot defective pixel 200, the processing start point 234 is set at a corner portion adjacent to the adjacent pixel 208 having the lowest specific visibility and the adjacent pixel 201 having the second lowest specific visibility, and laser irradiation is started, and scanning is performed. The laser beam is scanned along the path 233, and the scanning is ended at a processing end point 235 set at a corner different from the processing start point 234.

  When scanning is performed in this manner, the laser beam processing start point 234 is set at a position closer to the adjacent pixel 208 and the adjacent pixel 201, so that the liquid crystal orientation abnormal region 206 is widely generated in the adjacent pixel 208 and the adjacent pixel 201. In addition, the R and G lights that are the colors of the respective color filter color materials 6 are emitted from a wide range, and the leakage light of Y having high specific visibility from the adjacent pixels 202 is reduced. As a result, it is possible to make a display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 200 is irradiated with laser light to darken.

  Here, the processing start point 234 is set to the corner that touches the adjacent pixel 208 and the adjacent pixel 201. However, the processing start point 234 is set to the corner that touches the adjacent pixel 201 and the other adjacent pixel 207 that shows R with the lowest relative visibility. Even if the machining start point 224 is set, the same effect can be obtained.

  Next, the case where the color of the color filter color material 6 formed on the bright spot defective pixel 200 is G will be described with reference to FIG.

  In FIG. 19, when comparing the relative luminous sensitivities of the colors of the color filter color material 6 formed in the four pixels 201, 202, 207, 208 adjacent to the bright spot defective pixel 200 on the side, the upper adjacent pixel 207 and the lower side The Y of the adjacent pixel 208 has the highest relative visibility, the R of the left adjacent pixel 201 is next highest, and the B of the right adjacent pixel 202 has the lowest specific visibility. Therefore, in the bright spot defective pixel 200 to be darkened, the processing start point 224 is set near the center of the outer peripheral portion in contact with the adjacent pixel 202 having the lowest specific visibility, and laser irradiation is started, as shown in FIG. The bright spot defect pixel 200 is scanned along the scanning path 243 in a zigzag manner or along the outer periphery, and the scanning is terminated when the processing end point set near the center of the outer periphery is reached.

  When scanning is performed in this manner, the laser beam processing start point 244 is set at a position closer to the adjacent pixel 202, so that the liquid crystal orientation abnormality region 206 is adjacent to the adjacent pixel 201, the adjacent pixel 207, and the adjacent pixel 208. It occurs widely within 202. Although light distribution abnormality occurs to some extent in the adjacent pixels 207 and 208, the spread is small compared to the adjacent pixels 202. Therefore, the B light, which is the color of the color filter color material 6 formed in the adjacent pixel 202, is emitted from a wide range, and the leakage light of Y with high relative visibility from the adjacent pixel 207 and the adjacent pixel 208 is small. As a result, it is possible to make a display defect occurring in the peripheral portion inconspicuous when the bright spot defect pixel 200 is irradiated with laser light to darken.

  Here, when the processing start point 244 is set at the corner of the bright spot defective pixel 200 as in the example shown in FIG. 18, the processing start position is the adjacent pixel 207 indicating the color of Y with the highest relative visibility or This is not preferable because it is close to the adjacent pixel 208, and the abnormal alignment region 206 is greatly expanded in the adjacent pixel 207 or the adjacent pixel 208, and Y light having the highest relative visibility is emitted from a wide range. .

  Similarly, the case where the color of the color filter color material 6 formed in the bright spot defective pixel 200 is Y will be described with reference to FIG.

  As shown in FIG. 20, when the bright spot defective pixel 200 is Y, the adjacent pixels 207 and 208 have the highest relative visibility when the adjacent pixel 207 and the adjacent pixel 208 are G, and then the R, The lowest is B of the adjacent pixel 201. Therefore, in the bright spot defective pixel 200, the processing start point 254 is set near the center of the outer peripheral portion in contact with the adjacent pixel 201 having the lowest specific visibility, laser irradiation is started, and laser light is emitted along the scanning path 253. The scanning is finished, and the scanning is finished at the processing end point 255 set near the center of the outer periphery.

  When scanning is performed in this manner, the laser beam processing start point 254 is set at a position closer to the adjacent pixel 201, so that the liquid crystal orientation abnormality region 206 is adjacent to the adjacent pixels 202, 207, and 208. It occurs widely in 201. The alignment abnormality occurs to some extent in the adjacent pixel 207 and the adjacent pixel 208, but the spread is small compared to the adjacent pixel 201. Therefore, the B light, which is the color of the color filter color material 6 formed in the adjacent pixel 201, is emitted from a wide range, and the G leakage light with high relative visibility from the adjacent pixel 207 and the adjacent pixel 208 is small. Thereby, it is possible to make the display unnecessary generated in the peripheral portion inconspicuous when the bright spot defective pixel 200 is irradiated with laser light to darken.

1 liquid crystal, 2,8 glass substrate, 3,9 polarizing plate, 4 common electrode,
5,11 Alignment film, 6 Color filter color material, 7 Black matrix,
10 TFT array, 12 color filter, 13 color filter substrate,
14 TFT substrate, 15 LCD panel, 16 Backlight,
17 drive control board, 20 liquid crystal module, 30 laser irradiation / observation part,
31 laser drive power supply, 32 laser oscillator, 33 Z stage,
34 adjustment optical system, 35 variable aperture device, 36 laser processing optical system,
37 camera, 40 liquid crystal panel installation part, 41 drive control device,
42 XY table, 42a transmission hole, 43 light source for observation,
50 bright spot defect darkening device, 60,200 bright spot defect pixels,
61, 62, 201, 202, 207, 208, 209, 210 adjacent pixels,
63, 73, 83, 93, 103, 203, 213, 223, 233, 243, 253 scanning path,
64, 74, 84, 87, 89, 94, 104, 204, 214, 224, 234, 244, 254 Processing start point,
65, 75, 85, 86, 88, 95, 105, 205, 215, 225, 235, 245, 255 Processing end point, 66, 206 An abnormal orientation region.

Claims (8)

A color filter substrate in which a plurality of color pixels including at least three colors are arranged;
A thin film transistor array substrate in which a plurality of thin film transistors for driving pixel electrodes corresponding to each color pixel are arranged;
In a liquid crystal display device comprising a liquid crystal sealed between the color filter substrate and the thin film transistor array substrate, a laser beam is irradiated toward a bright spot defect pixel having a bright spot defect, and at least the color filter substrate A method for correcting a bright spot defect in a liquid crystal display device in which a part of the liquid crystal display is modified to reduce light transmittance,
Irradiating the laser beam with a spot size smaller than the bright spot defective pixel toward the bright spot defective pixel;
Moving the laser light relative to the liquid crystal display device, and scanning the laser light in the bright spot defective pixels,
In the step of scanning with the laser beam, a pixel having a low relative visibility compared to a color pixel having a high relative visibility among the color pixels adjacent to the bright spot defective pixel in the laser light irradiation start position. A bright spot defect correcting method for a liquid crystal display device, characterized by being set close to   2. The method for correcting a bright spot defect in a liquid crystal display device according to claim 1, wherein the irradiation start position of the laser beam is set at a corner portion of an outer peripheral portion in contact with a pixel having a low specific visibility.   In the step of scanning with the laser light, first, scanning is performed along an outer peripheral portion in contact with a pixel having a low relative visibility, and the laser light is gradually scanned toward a pixel having a high relative visibility. The method for correcting a bright spot defect in a liquid crystal display device according to claim 1 or 2.   3. The liquid crystal display device according to claim 1, wherein, in the step of scanning with the laser light, the laser light is scanned from a pixel having a low relative visibility toward a pixel having a high relative visibility. 4. Bright spot defect correction method.   5. The step of scanning with the laser beam, the laser beam is continuously scanned from the irradiation start position of the laser beam to a position where the irradiation of the laser beam ends. For correcting bright spot defects in liquid crystal display devices. A plurality of color pixels are arranged in a matrix on the color filter substrate,
6. The irradiation start position of the laser beam is set closest to a pixel having the lowest relative visibility among four pixels adjacent to the bright spot defective pixel. The bright spot defect correction method of the liquid crystal display device in any one. In the color filter substrate, a plurality of color pixels including four colors are arranged in a matrix,
When there are two pixels with the lowest relative visibility among the four pixels adjacent to the bright spot defective pixel, the irradiation start position of the laser beam is the pixel with the lowest relative visibility and the specific vision. Sensitivity is set at the corner close to both of the 2nd lowest color pixels,
When there is only one pixel with the lowest relative visibility among the four pixels adjacent to the bright spot defective pixel, the irradiation start position of the laser light is in contact with the pixel with the lowest relative visibility. 2. The bright spot defect correcting method for a liquid crystal display device according to claim 1, wherein the bright spot defect correcting method is set at the center of the outer peripheral portion. A color filter substrate in which a plurality of color pixels including at least three colors are arranged;
A thin film transistor array substrate in which a plurality of thin film transistors for driving pixel electrodes corresponding to each color pixel are arranged;
In a liquid crystal display device comprising a liquid crystal sealed between the color filter substrate and the thin film transistor array substrate, a laser beam is irradiated toward a bright spot defect pixel having a bright spot defect, and at least the color filter substrate A method of manufacturing a liquid crystal display device including a step of altering a part to reduce light transmittance and correcting a bright spot defect,
Irradiating the laser beam with a spot size smaller than the bright spot defective pixel toward the bright spot defective pixel;
Moving the laser light relative to the liquid crystal display device, and scanning the laser light in the bright spot defective pixels,
In the step of scanning with the laser beam, a pixel having a low relative visibility compared to a color pixel having a high relative visibility among the color pixels adjacent to the bright spot defective pixel in the laser light irradiation start position. A method for manufacturing a liquid crystal display device, characterized in that the liquid crystal display device is set close to the liquid crystal display.