JP3688370B2 - Liquid crystal color filter film transfer correction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal color filter film transfer correction device, and more particularly to a liquid crystal color filter film transfer correction device that corrects defects such as white spots and black defects on a color filter that occur in the manufacturing process of a color filter substrate for liquid crystal. .
[0002]
[Prior art]
A color filter used for colorizing a liquid crystal panel has an increased number of pixels with an increase in screen size and high definition. Therefore, it becomes difficult to produce a color filter having no defect, and white spots and black defects are generated. In order to correct these, a method of dropping the same color ink to correct white spots is adopted, and for black defects, after removing a range including foreign matters by irradiating laser light, the same color ink is used. The method of dropping is used. Also, a method such as polishing is used for foreign matters and protrusions.
[0003]
[Problems to be solved by the invention]
In the ink dropping method described above, know-how such as ink viscosity and type is required, and it is difficult to control the thickness of the correction portion. Further, the polishing method has a drawback that it is difficult to adjust the gap between the polishing tape and the color filter.
[0004]
SUMMARY OF THE INVENTION Therefore, a main object of the present invention is to provide a liquid crystal color filter film transfer correcting device that can solve the conventional problems and can correct defects of the color filter substrate by a simple process.
[0005]
[Means for Solving the Problems]
The present invention is a liquid crystal color filter film transfer correction device for correcting a white portion of a liquid crystal color filter substrate using a transfer film , the transfer film comprising a base film, a photosensitive colored layer formed on the surface thereof, And a cover film for protecting the surface. This liquid crystal color filter film transfer correction device transfers the photosensitive colored layer of the transfer film by thermocompression bonding from above onto a thick glass supporting the color filter substrate on one side and a region including the white-out portion of the color filter substrate. A thermocompression head including a heater, an XY stage for moving the white plate portion below the thermocompression head by moving the thick glass on the XY axis, and removing the cover film from the transfer film. Then, the film supply section for supplying between the thermocompression bonding head and the color filter substrate, and irradiating the photosensitive colored layer transferred to the color filter substrate with the color filter substrate as a mask from the other side of the thick glass plate is irradiated with ultraviolet rays. And a light source for curing only a portion corresponding to the white portion of the color filter substrate. Here, the film supply unit winds the cover film from the supply reel wound with the transfer film and the transfer film wound around the supply reel, and winds the base film via the thermocompression bonding head. A take-up reel, a tensioner for applying tension to the base film between the thermocompression bonding head and the take-up reel, a rotary shaft into which the supply reel is fitted, a take-up shaft into which the take-up reel is fitted, and the take-up shaft to be rotated. The supply reel, the take-up reel, and the tensioner are formed in a cassette and are detachably provided.
[0006]
Therefore, in the present invention, the thick glass is moved to move the color filter substrate below the thermocompression bonding head, and the photosensitive colored layer of the transfer film is thermocompression-transferred from above to the region including the whiteout portion, and the thickness is increased. The photosensitive color layer is irradiated with ultraviolet rays from the bottom of the plate glass as a mask, and only the part corresponding to the white-out part is cured, so that the correction surface is flat and does not protrude from the defect. You can correct it. Further, by using a colored layer made of the same material as the color filter, all the color filters can be made of the same material. Further, since the colored layer is transferred to a range larger than the defective portion, it is not necessary to perform positioning with high accuracy, and production efficiency can be improved. Further, since the cover film and the base film are wound with one take-up reel and the supply reel, the take-up reel and the tensioner are made into a cassette, the transfer film can be easily replaced.
[0007]
Preferably, provides a plurality of transfer film comprising a photosensitive color layers of different colors from each other, the supply reel and the take-up reel are provided corresponding to each of the transfer film, a plurality of supply reels fitted to the rotary shaft The take-up shaft is fitted with a plurality of take-up reels. Further, the Z stage for moving the thermocompression bonding head on the Z axis, and the Z stage are mounted. And a sub-stage for supplying a transfer film selected from the plurality of transfer films between the thermocompression bonding head and the color filter substrate .
[0011]
Preferably , a laser light source is further provided for removing black defects from the color filter substrate to generate white spots .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
1 is a front view of one embodiment of the present invention, FIG. 2 is a side view of the Z stage shown in FIG. 1, and FIG. 3 is a view showing the cassette shown in FIGS.
[0013]
First, the configuration of an embodiment of the present invention will be described with reference to FIGS. An XY stage 2 in which the stage has a hollow structure is fixed on the base 1. A thick glass 3 is fixed on the upper surface of the XY stage 2, and a groove for a vacuum chuck is formed on the thick glass 3, so that the color filter 4 placed thereon can be adsorbed and fixed. A Z stage 5 movable in a direction orthogonal to the surface of the XY stage 2 is fixed to a Z stage fixing base 6.
[0014]
As shown in FIG. 2, the Z stage 5 is provided with a Y ′ stage 7 that can move in a direction perpendicular to the Z stage (Y-axis direction). A linear bearing 8 is fixed to the Y ′ stage 7, and the linear bearing 8 is guided by the slide guide 9. The Y ′ stage 7 is moved in the Y-axis direction by the slide motor 10. In addition, a cassette 16 as shown in FIG.
[0015]
The cassette 16 has a supply reel 12 for supplying the transfer film 11, a take-up reel 13 for the cover film 11 a protecting the used transfer film and the transfer film, a roller 14 for guiding the transfer film 11, and a transfer film 11. It consists of a tensioner 15 for applying tension. A handle 17 is attached to the cassette 16 for holding by hand when the cassette is inserted or removed. The supply reel 12 is not only for correcting white defects with a single black color, but also for preparing and correcting four colors R (red), G (green), B (blue), and K (black) of the color film. is there. A take-up reel for each color is also prepared on the take-up reel 13 side. Thus, by replacing the supply reel 12 and the take-up reel 13 into a cassette, the transfer film can be easily replaced.
[0016]
The supply reel 12 is inserted into a rotation shaft 35 on the Y ′ stage 7. The shaft 35 is provided with a preload mechanism 18 for applying torque. In addition, the take-up reel 13 is inserted into a take-up shaft 19 on the Y ′ stage 7. A pulley 20 is fixed to the winding shaft 19, and the belt 23 transmits the rotation of the pulley 22 provided on the shaft of the pulse motor 21 to rotate the winding shaft 19. For this reason, the supply reel 12 and the take-up reel 13 for each color rotate in the same manner.
[0017]
An air cylinder 24 is fixed to a fixed base 36 fixed to the Z-axis stage 5, and a crimping head 25 is attached to the shaft. A heater 26 is fixed to the pressure bonding head 25, and the transfer film is heated by the heater 26. Further, a microscope 27, a CCD camera 28, and an epi-illumination light source 29 are attached to the Z stage 5, and a transmission illumination light source 30 is provided below the XY stage 2. The microscope 27 is for observing defects, and the output of the CCD camera 28 can be displayed on a monitor for viewing. The epi-illumination light source 29 and the transmission illumination light source 30 are provided as illumination for observation.
[0018]
FIG. 4 is a diagram showing a process for correcting white defects according to one embodiment of the present invention, FIG. 5 is a diagram showing an enlarged cross section of a transfer film, and FIG. 6 is a diagram showing a transfer in one embodiment of the present invention. It is a figure which shows a state.
[0019]
Next, a white defect correction method will be described with reference to FIGS.
As shown in FIG. 5, the transfer film used in this embodiment is a photosensitive colored layer 11b in which a pigment is dispersed on a polyester base film 11e having a thickness of 20 to 100 μm via an auxiliary layer 11d and an intermediate layer 11c. Are stacked, and the cover film 11a protects the colored layer 11b.
[0020]
The XY stage 2 shown in FIG. 1 is moved, and the defective portion 31 of the color film 4 is moved below the pressure bonding head 25 as shown in FIG. Then, the transfer film 11 used for correction is selected by moving the Y ′ stage 7 and moved below the pressure-bonding head 25. Next, as shown in FIG. 4B, the air cylinder 24 is lowered to press the pressure-bonding head 25 against the selected transfer film 11, the heater 26 is heated, and the coloring on the transfer film 11 shown in FIG. Warm layer 11b. Thereafter, as shown in FIG. 4C, the Z stage 5 is lowered, and the transfer film 11 is pressed against the defective portion 31 via the crimping head 25. Thereafter, the heater 26 is heated so that the transfer film 11 is thermocompression bonded to the defective portion 31. Thereafter, heating of the heater 26 is stopped, and after natural air cooling, the Z stage 5 and the air cylinder 24 are raised as shown in FIG. Then, the take-up reel 13 is rotated to take up the used transfer film 11.
Further, by making a cut in the film width direction with a cutter blade or the like in the colored layer 11b before thermocompression bonding, the base film after transfer can be easily peeled off, and the peripheral edge of the transferred colored layer can be firmly adhered. .
[0021]
FIG. 6A shows a state in which the transfer film 11 is thermocompression bonded to the white defect 32 in the color filter 4. After this, ultraviolet exposure is performed from the opposite side of the color filter 4, but the color filter 4 serves as a mask and the transfer film 11 is cured only in the white defect portion, and the other transfer film 11 is not cured. The colored layer remains only in the white defect portion. FIG. 6B shows the state.
[0022]
As described above, in the embodiment of the present invention, the correction surface of the defect portion 31 is flat and does not protrude from the defect portion, and can be corrected to the same height as a normal portion. Further, since the same film as the color filter is used, all the color filters 4 can be made of the same material and transferred to a range larger than the defective portion, so that the production efficiency can be improved without requiring high-precision positioning.
[0023]
FIG. 7 is a diagram showing a second embodiment of the present invention. In this embodiment, an ultraviolet exposure light source 33 is provided below the XY table 2. After the natural air cooling shown in FIG. 4D, the Z stage 5 and the air cylinder 24 are raised, and then the exposure is performed. Is to do. Further, as shown in FIG. 4C, exposure may be performed after the transfer film 11 is thermocompression bonded to the defective portion 31. In this case, the correction is completed through development, washing and drying procedures.
[0024]
FIG. 8 is a diagram showing a third embodiment of the present invention. In the embodiment shown in FIG. 8, a laser 34 is added. After the black defects are removed once by the laser to form white defects, the procedure shown in FIGS. 4A to 4D is performed. The same operation is performed.
[0025]
【The invention's effect】
As described above, according to the present invention, modified surface of the color filter without protruding from the planar defects can be as high as the normal portion. Further, in order to use a colored layer of the same material as the color filter, Ru can all color filters in the same material. Further , since the colored layer is transferred to a range larger than the defective portion, it is not necessary to perform positioning with high accuracy, and production efficiency can be improved. Furthermore, since the exposure process using ultraviolet rays and the removal process using a laser can be performed, the process can be simplified.
[Brief description of the drawings]
FIG. 1 is a front view of an embodiment of the present invention.
FIG. 2 is a side view of the Z stage shown in FIG.
FIG. 3 is a view showing the cassette shown in FIGS. 1 and 2;
FIG. 4 is a diagram showing a process of correcting a white defect according to an embodiment of the present invention.
FIG. 5 is an enlarged view showing each cross section of a transfer film.
FIG. 6 is a diagram showing a transfer state in one embodiment of the present invention.
FIG. 7 is a diagram showing a second embodiment of the present invention.
FIG. 8 is a diagram showing a third embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 XY stage 3 Thick glass 4 Color filter 5 Z stage 6 Z stage fixed base 7 Y 'stage 8 Linear bearing 9 Slide guide 10 Slide motor 11 Transfer film 12 Supply reel 13 Take-up reel 14 Roller 15 Tensioner 16 Cassette 17 Handle 18 Preloading mechanism 19 Winding shaft 20 Pulley 21 Pulse motor 22 Pulley 23 Belt 24 Air cylinder 25 Crimping head 26 Heater 27 Microscope 28 CCD camera 29 Epi-illumination light source 30 Transmitted illumination light source 31 Defect portion 32 White defect 33 Ultraviolet exposure light source 34 Laser 35 Rotating shaft 36 Fixed base

Claims (3)

A liquid crystal color filter film transfer correcting device for correcting a white portion of a liquid crystal color filter substrate using a transfer film,
The transfer film includes a base film, a photosensitive colored layer formed on the surface, and a cover film that protects the surface.
The liquid crystal color filter film transfer correction device,
Thick glass that supports the color filter substrate on one side,
A thermocompression bonding head including a heater for transferring the photosensitive colored layer of the transfer film by thermocompression transfer from above to a region including a white portion of the color filter substrate;
An XY stage for moving the thick plate glass on the XY axis, and moving a hollow portion of the color filter substrate below the thermocompression bonding head;
A film supply unit for removing the cover film from the transfer film and supplying the film between the thermocompression bonding head and the color filter substrate, and the color filter substrate as a mask from the other side of the thick glass Irradiating the photosensitive colored layer transferred to the filter substrate with ultraviolet light, and equipped with a light source for curing only the portion corresponding to the white spot portion of the color filter substrate ,
The film supply unit
A supply reel on which the transfer film is wound;
A take-up reel for winding the cover film from the transfer film wound on the supply reel and winding the base film via the thermocompression head;
A tensioner for applying tension to the base film between the thermocompression bonding head and the take-up reel;
A rotating shaft into which the supply reel is fitted,
A take-up shaft into which the take-up reel is fitted, and
Including a pulse motor that rotationally drives the winding shaft;
The liquid crystal color filter film transfer correcting device , wherein the supply reel, the take-up reel and the tensioner are detachably provided in a cassette . A plurality of transfer film is prepared containing different color photosensitive color layer,
The supply reel and the take-up reel are provided corresponding to each transfer film,
A plurality of supply reels are fitted on the rotating shaft,
A plurality of take-up reels are fitted on the take-up shaft,
A Z stage for moving the thermocompression bonding head on the Z axis; and
Mounted on the Z stage, mounted on the film supply unit, moved in a direction perpendicular to the Z axis, and selected transfer films of the plurality of transfer films are transferred to the thermocompression bonding head and the color filter substrate. The liquid crystal color filter film transfer correcting device according to claim 1 , further comprising a sub-stage that is supplied between the two . Further, by removing the black defect of the color filter substrate with a laser light source for generating the white spot portion, liquid crystal color filter film transfer correction device according to claim 1 or claim 2.

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