JP6567576B2 - Display device - Google Patents

Description

  The present disclosure relates to a display device including a light emitting device suitable for a surface light source.

  2. Description of the Related Art A surface light emitting device using a blue LED (Light Emitting Diode) is employed for a backlight or a lighting device of a liquid crystal display device. For example, Patent Document 1 describes that a film coated with a fluorescent material is provided on the light emission observation surface of a light guide plate, and that white light is obtained by converting the wavelength of light incident on the light guide plate from a blue LED with the fluorescent material. . For example, Patent Document 2 describes that a wavelength converter in which a fluorescent substance is mixed with an elastic body is provided between a blue LED and an end face of a light guide plate.

Japanese Patent No. 3116727 Japanese Patent No. 3114805

  In a light-emitting device used as a surface light source, it is generally strongly desired to increase in-plane color uniformity.

  The present disclosure has been made in view of such problems, and an object of the present disclosure is to provide a display device including a light-emitting device capable of enhancing in-plane color uniformity.

A first display device of the present disclosure includes a display panel and a light emitting device on the back side of the display panel. The light emitting device is a light source that emits blue light, a light incident surface that faces the light source and extends in the left-right direction. an optical component having, arranged between the light source and the light incident surface, and a wavelength conversion member for wavelength converting at least a portion of the blue light from the light source to red or green light, extending in the lateral direction, the light source The optical component and the wavelength conversion member are provided with a container for accommodating the wavelength conversion member, and the wavelength conversion member is a region surrounded by the light path and the light incident surface of light incident on the upper and lower ends of the light incident surface from the light source And extends to an outer region beyond this region.
The second display device of the present disclosure includes a liquid crystal panel and a light emitting device on the back side of the liquid crystal panel, and the light emitting device has a light source and a first light incident surface that faces the light source and extends in the left-right direction. And a light guide plate facing the liquid crystal panel and having a concavo-convex surface perpendicular to the first light incident surface, quantum dots provided between the light source and the first light incident surface, and extending in the left-right direction. A light source, a light guide plate, and a quantum dot, and a container that accommodates the quantum dot. The quantum dot includes an optical path of light incident on an upper end and a lower end of the first light incident surface from the light source, and the first light incident surface. It extends across the region surrounded by, and extends to the outer region beyond this region.

  In the first and second display devices of the present disclosure, image display is performed by selectively transmitting light from the light emitting device through the liquid crystal panel. In this light-emitting device, the light emitted from the light source is wavelength-converted by the wavelength conversion member, travels through the optical member, exits from the light exit surface, and is observed as light emission. In the first display device of the present disclosure, the wavelength conversion member crosses a region surrounded by the light path and the light incident surface of the light incident on the end of the light incident surface from the light source and extends to an outer region beyond this region. Exist. Therefore, light that does not pass through the wavelength conversion member among light from the light source, that is, light that is not wavelength-converted by the wavelength conversion member is reduced.

  According to the first and second display devices of the present disclosure, the wavelength conversion member crosses the region surrounded by the light path and the light incident surface of the light incident on the end of the light incident surface from the light source and exceeds the region. Since it extends to the outer region, it is possible to improve the uniformity of in-plane color. Therefore, if a display device or a lighting device is configured by this light emitting device, high-quality display or lighting can be obtained.

It is a perspective view showing the whole light-emitting device composition concerning a 1st embodiment of this indication. It is sectional drawing showing the arrangement | positioning relationship of the light source shown in FIG. 1, a light guide plate, and a wavelength conversion member. FIG. 3 is a perspective view illustrating a light bundle from a light source illustrated in FIG. 2 toward a light incident surface of a light guide plate. It is sectional drawing showing the structure of the light-emitting device which concerns on 2nd Embodiment of this indication. It is sectional drawing for demonstrating the case where a light shielding member is not provided. FIG. 6 is a plan view schematically illustrating a light emission state of the light emitting device illustrated in FIG. 5. It is sectional drawing showing an example of the dimension of the light-emitting device shown in FIG. It is sectional drawing showing the location from which the blue light radiate | emits in the light-emitting device which has the dimension shown in FIG. It is sectional drawing showing the modification of the light-emitting device shown in FIG. It is sectional drawing showing the other modification of the light-emitting device shown in FIG. FIG. 10 is a cross-sectional view illustrating still another modification of the light emitting device illustrated in FIG. 4. FIG. 10 is a cross-sectional view illustrating still another modification of the light emitting device illustrated in FIG. 4. 14 is a perspective view illustrating an appearance of a display device according to a third embodiment of the present disclosure. FIG. FIG. 14 is an exploded perspective view of the main body shown in FIG. 13. FIG. 15 is an exploded perspective view illustrating the panel module illustrated in FIG. 14. It is a perspective view showing the external appearance of the application example 1 of a display apparatus. 12 is a perspective view illustrating an appearance of application example 2. FIG. (A) is a perspective view showing the external appearance seen from the front side of the application example 3, (B) is a perspective view showing the external appearance seen from the back side. 14 is a perspective view illustrating an appearance of application example 4. FIG. 14 is a perspective view illustrating an appearance of application example 5. FIG. (A) is a front view of the application example 6 in an open state, (B) is a side view thereof, (C) is a front view in a closed state, (D) is a left side view, and (E) is a right side view, (F) is a top view and (G) is a bottom view. It is a perspective view showing the external appearance of the application example 7 of an illuminating device. It is a perspective view showing the external appearance of the application example 8 of an illuminating device. It is a perspective view showing the external appearance of the application example 9 of an illuminating device.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The description will be given in the following order.
1. First Embodiment (Light Emitting Device; Wavelength Conversion Member Crosses Region Surrounded by Light Path and Light Incidence Surface of Light Incident from Light Source to End of Light Incident Surface, and to Outer Region beyond this Region Extended example)
2. Second embodiment (light emitting device; an example in which a light blocking member is provided on an optical path of light from a light source that passes through a container without passing through a wavelength conversion member and contacts a light incident surface of a light guide plate)
3. Third embodiment (display device; liquid crystal display device)
4). Application examples 1 to 6 of display device
5. Application examples 7 to 9 of lighting device

(First embodiment)
FIG. 1 illustrates the overall configuration of the light emitting device according to the first embodiment of the present disclosure. The light emitting device 1 is used, for example, as a backlight that illuminates a transmissive liquid crystal panel from behind, or as an illuminating device in a room or the like, and includes a light source 10, a light guide plate 20, a wavelength conversion member 30, and a reflection member 40. And an optical sheet 50. The light guide plate 20 corresponds to a specific example of “optical component” in the present disclosure.

  In this specification, the stacking direction of the optical sheet 50, the light guide plate 20, and the reflecting member 40 is the Z direction (front-rear direction), the left-right direction is the X direction and the vertical direction is the Y direction on the main surface (widest surface) of the light guide plate 20. That's it.

  The light source 10 is a point light source, and specifically includes an LED (Light Emitting Diode). The light source 10 is sealed in, for example, a package 11 (not shown in FIG. 1, refer to FIG. 2) and mounted on the light source substrate 12, and a light incident surface 20A of the light guide plate 20 (in FIG. 1). For example, left and right end faces). The light source substrate 12 has, for example, an elongated rectangular parallelepiped shape, and is arranged in a line in the longitudinal direction of the light source substrate 12.

  The light guide plate 20 guides light from the light source 10 from the light incident surface 20A to the light emitting surface 20B. For example, the light guide plate 20 is transparent such as polycarbonate resin (PC) or acrylic resin (for example, PMMA (polymethyl methacrylate)). It is mainly composed of thermoplastic resin. The light guide plate 20 has, for example, a rectangular parallelepiped shape including a pair of main surfaces (front surface and back surface) facing in the front-rear direction (Z direction), and four upper, lower, left, and right end surfaces (side surfaces) in contact therewith.

  As described above, the left and right end surfaces of the light guide plate 20 are light incident surfaces 20A on which light from the light source 10 is incident. The light incident surface 20 </ b> A may be only one of the left and right end surfaces of the light guide plate 20. Further, the light incident surface 20A may be three end surfaces of the light guide plate 20, or all four end surfaces.

  The front and back surfaces of the light guide plate 20 are light emitting surfaces 20B and 20D that emit light incident from the light incident surface 20A. The light emission surface 20B (front surface) and the light emission surface 20D (back surface) of the light guide plate 20 correspond to, for example, an irradiation object (for example, a liquid crystal panel 122 described later) disposed on the light emission surface 20B side of the light guide plate 20. It has a planar shape.

The light exit surface 20B (front surface) of the light guide plate 20 is provided with a concavo-convex pattern composed of fine convex portions 20C, for example, in order to improve the straightness of light propagating through the light guide plate 20. The convex portion 20C is, for example, a strip-shaped protrusion or ridge that extends in one direction (for example, the left-right direction) of the light emitting surface 20B.
On the light exit surface 20D (back surface) of the light guide plate 20, for example, a scattering agent is printed in a pattern as a scattering portion that scatters and makes the light propagating through the light guide plate 20 uniform.
In addition, as a scattering part, it can replace with a scattering agent and can provide the site | part containing a filler, or can also make a surface partially roughened.

  The wavelength conversion member 30 converts the wavelength of light from the light source 10 and is provided between the light source 10 and the light incident surface 20 </ b> A of the light guide plate 20. The wavelength conversion member 30 preferably includes, for example, a fluorescent material. Specifically, the light source 10 is a blue light source, and the wavelength conversion member 30 preferably includes a fluorescent material that converts the wavelength of blue light from the light source 10 into red light or green light. Thereby, in this light-emitting device 1, it becomes possible to produce | generate the light of various color tone by synthesize | combining the red light and green light which were wavelength-converted by the wavelength conversion member 30. FIG.

  Furthermore, it is preferable that the wavelength conversion member 30 contains a quantum dot, for example. That is, it is preferable that the light source 10 is a blue light source, and the wavelength conversion member 30 includes quantum dots that convert the wavelength of blue light from the light source 10 into red light or green light. Quantum dots have discrete energy levels, and the emission wavelength can be freely selected by changing the dot size. The obtained spectrum of red light and green light has a narrow half-value width and a steep peak. Therefore, the color purity of red light and green light is increased, and the color gamut of the combined light is widened. Therefore, the color gamut can be expanded as compared with a conventional light emitting device using a white LED and a fluorescent material.

  The reflecting member 40 is a plate-like or sheet-like member provided on the light emitting surface 20D (back surface) side of the light guide plate 20, and light leaked from the light source 10 to the light emitting surface 20D side of the light guide plate 20 or The light emitted from the inside of the light guide plate 20 toward the light emission surface 20 </ b> D is returned toward the light guide plate 20. The reflection member 40 has functions such as reflection, diffusion, and scattering, for example, so that the light from the light source 10 can be efficiently used and the front luminance can be increased.

  The reflecting member 40 is made of, for example, foamed PET (polyethylene terephthalate), a silver deposited film, a multilayer film, or white PET. When the reflecting member 40 has a regular reflection (specular reflection) function, the surface of the reflecting member 40 is preferably subjected to a treatment such as silver vapor deposition, aluminum vapor deposition, or multilayer film reflection. When a fine shape is imparted to the reflecting member 40, the reflecting member 40 may be integrally formed by a technique such as hot press molding using a thermoplastic resin or melt extrusion molding, or, for example, PET It may be formed by applying an energy ray (for example, ultraviolet ray) curable resin on a substrate made of, for example, and then transferring the shape to the energy ray curable resin. Here, examples of the thermoplastic resin include polycarbonate resins, acrylic resins such as PMMA (polymethyl methacrylate resin), polyester resins such as polyethylene terephthalate, and amorphous copolymers such as MS (copolymer of methyl methacrylate and styrene). Examples thereof include a polymerized polyester resin, a polystyrene resin, and a polyvinyl chloride resin. Further, when the shape is transferred to an energy ray (for example, ultraviolet ray) curable resin, the substrate may be glass.

  The optical sheet 50 is provided on the light emitting surface 20B (front surface) side of the light guide plate 20, and includes, for example, a diffusion plate, a diffusion sheet, a lens film, a polarization separation sheet, and the like. In FIG. 1, only one of the plurality of optical sheets 50 is shown. By providing such an optical sheet 50, light emitted from the light guide plate 20 in an oblique direction can be raised in the front direction, and the front luminance can be further increased.

  FIG. 2 shows an arrangement relationship of the light source 10, the light guide plate 20, and the wavelength conversion member 30 shown in FIG. 1, and shows a cross section that passes through the light emission center 10A of the light source 10 and is perpendicular to the light incident surface 20A. . As described above, the light source 10 is disposed to face the light incident surface 20A of the light guide plate 20, and the wavelength conversion member 30 is disposed between the light source 10 and the light incident surface 20A. A reflective member 40 is laid on the light exit surface 20D (back surface) side of the light guide plate 20.

  The wavelength conversion member 30 is preferably housed and sealed in a tubular container (capillary) 31 such as glass. This is because changes in the characteristics of the wavelength conversion member 30 due to moisture and oxygen in the atmosphere can be suppressed, and handling can be facilitated. Note that such a wavelength conversion member 30 is prepared by, for example, kneading a fluorescent material or quantum dots in an ultraviolet curable resin, putting the obtained mixture in a container 31 such as a glass tube, and sealing one side of the container 31. The resin can be cured by irradiating ultraviolet rays to form a gel-like wavelength conversion member 30 having a certain degree of viscosity.

  The wavelength conversion member 30 traverses the region S1 surrounded by the light incident surface 20A and the optical path of the light ν1 and ν2 incident on the ends (the upper end 20E and the lower end 20F) of the light incident surface 20A from the light source 10, and passes this region S1. It extends to the outer region S2 beyond. Thereby, in this light-emitting device 1, in-plane color uniformity can be improved.

  The light source 10 and the wavelength conversion member 30 illustrated in FIG. 2 are held by a fixing member (holder) 60, for example. The fixing member 60 is made of a highly reflective polycarbonate resin, polyamide resin (for example, “Genesta (trade name)” manufactured by Kuraray Co., Ltd.), and the like. For example, the first fixing portion 61 that holds the light source 10 and the wavelength conversion member 30. The second fixing portion 62 and the third fixing portion 63 that hold the

  The first fixing portion 61 is a portion to which the light source substrate 12 on which the light source 10 is mounted is attached, and faces the light incident surface 20A. An opening 61 </ b> C that penetrates from the outer surface 61 </ b> A to the inner surface 61 </ b> B is provided at the center of the first fixing portion 61. A seat 61D is provided on the outer surface 61A side of the opening 61C by denting the periphery of the opening 61C in a stepped manner. Accordingly, the light source substrate 12 is fixed to the seat portion 61D, so that the package 11 on which the light source 10 is mounted fits gently into the opening 61C. The seat portion 61D is not necessarily provided depending on the dimensions of the light source substrate 12. Moreover, in order to improve the utilization efficiency of the light from the light source 10, it is desirable that part or all of the inner surface 61B is an inclined surface.

  The 2nd fixing | fixed part 62 and the 3rd fixing | fixed part 63 pinch the upper end and lower end of the container 31 of the wavelength conversion member 30, and it fixes so that the position and direction of the container 31 may not shift | deviate. For example, the second fixing portion 62 and the third fixing portion 63 extend from the upper end and the lower end of the first fixing portion 61 in a substantially vertical direction with respect to the first fixing portion 61. Therefore, the cross-sectional shapes of the first fixing portion 61 to the third fixing portion 63 are, for example, three sides of a rectangle. The upper end and the lower end of the container 31 are engaged with, for example, fixing protrusions (not shown) provided on the second fixing portion 62 and the third fixing portion 63, so that the second fixing portion 62 and the third fixing portion are fixed. It is fixed to the part 63. The upper end and the lower end of the container 31 may be fixed by other methods such as a double-sided adhesive tape.

  Further, the end portion of the light guide plate 20 and the end portion of the reflection member 40 are sandwiched and held between the distal end portion of the second fixing portion 62 and the distal end portion of the third fixing portion 63. The second fixing portion 62 and the third fixing portion 63 need only sandwich at least the upper end and the lower end of the container 31, and the end portion of the light guide plate 20 and the end of the reflecting member 40 are provided by other members (described later). It is also possible to hold it.

  Note that a heat radiating member (heat spreader) (not shown) is attached to the outside of the fixing member 60, particularly around the light source 10. Further, the entire light emitting device 1 including the light source 10 or the fixing member 60 and the heat radiating member (not shown) is not shown in the case (not shown in FIGS. 1 and 2; for example, see the rear case 124 in FIG. 15). .)

  In this light-emitting device 1, the light emitted from the light source 10 is wavelength-converted by the wavelength conversion member 30, enters the light incident surface 20A of the light guide plate 20, travels through the light guide plate 20, exits from the light exit surface 20B, It passes through the optical sheet 50 and is observed as light emission.

  At this time, since the light source 10 is a point light source as described above, the light emitted from the light source 10 spreads in all directions of 360 ° from the emission center 10A. As shown in FIG. 3, since the wavelength conversion member 30 and the light incident surface 20A are long in the left-right direction, the spread of light in the left-right direction is not a problem. On the other hand, part of the light spreading in the vertical direction may be displaced upward from the upper end 20E of the light incident surface 20A or downward from the lower end 20F.

  Here, as shown in FIG. 2, the wavelength conversion member 30 is surrounded by the light incident surface 20A and the light paths of the light ν1 and ν2 incident on the ends (the upper end 20E and the lower end 20F) of the light incident surface 20A from the light source 10. It crosses the area S1 to be processed. In other words, the wavelength conversion member 30 intersects (crosses) the region S1 in a direction parallel to the light incident surface 20A. Therefore, the light incident on the light incident surface 20A through the region S1 can be subjected to wavelength conversion by the wavelength conversion member 30.

  Furthermore, the wavelength conversion member 30 extends to the outer region S2 beyond the region S1. That is, the wavelength conversion member 30 is provided so as to protrude from the region S1 and to the outer region S2. Therefore, light that is emitted from the light source 10 and spreads in the vertical direction and travels outside the region S1 can be captured to some extent by the wavelength conversion member 30 and undergo wavelength conversion. Therefore, in the light emitting device 1, light that does not pass through the wavelength conversion member 30 among light from the light source 10, that is, light that is not wavelength-converted by the wavelength conversion member 30, is reduced, and in-plane color uniformity is improved.

  As described above, in the present embodiment, the wavelength conversion member 30 is a region surrounded by the light incident surface 20A and the optical paths of the light ν1 and ν2 incident on the ends (the upper end 20E and the lower end 20F) of the light incident surface 20A from the light source 10. It crosses S1 and extends to a region S2 outside the region S1. Therefore, the light that does not pass through the wavelength conversion member 30 among the light from the light source 10, that is, the light that is not wavelength-converted by the wavelength conversion member 30, can be reduced, and the in-plane color uniformity can be improved.

(Second Embodiment)
FIG. 4 illustrates a cross-sectional configuration of a light emitting device 1A according to the second embodiment of the present disclosure. In the light emitting device 1A, by providing the light shielding member 70 between the container 31 of the wavelength conversion member 30 and the light incident surface 20A of the light guide plate 20, the color unevenness generated in the vicinity of the light incident surface 20A is reduced. The color uniformity is further enhanced. Except for this, the light emitting device 1A has the same configuration, operation, and effects as those of the first embodiment. Accordingly, the corresponding components will be described with the same reference numerals.

  The light source 10, the package 11, the light source substrate 12, the light guide plate 20, the wavelength conversion member 30, the container 31, the reflection member 40, and the optical sheet 50 are configured in the same manner as in the first embodiment.

  As in the first embodiment, the fixing member 60 includes a first fixing part 61 that holds the light source 10, and a second fixing part 62 and a third fixing part 63 that hold the wavelength conversion member 30. Yes.

  An opening 61 </ b> C that penetrates from the outer surface 61 </ b> A to the inner surface 61 </ b> B is provided at the center of the first fixing portion 61. In the present embodiment, the seat 61D on the outer surface 61A side of the opening 61C is not provided, and the light source substrate 12 is fixed to the outer surface 61A, so that the package 11 on which the light source 10 is mounted is loosely placed in the opening 61C. It comes to fit.

  The second fixing portion 62 holds the upper end of the container 31 of the wavelength conversion member 30 with being sandwiched between the third fixing portion 63. In FIG. 4, the optical sheet 50 is disposed on the light emitting surface 20 </ b> B of the light guide plate 20, and the end portion of the optical sheet 50 is not the second fixing portion 62 but the frame-shaped member 80 (FIG. 15). This represents the case of being held by The frame-shaped member 80 is a frame-shaped resin component that holds the optical sheet 50, a so-called middle chassis.

  The third fixing part 63 sandwiches the lower end of the container 31 of the wavelength conversion member 30 between the second fixing part 62. The distal end portion of the third fixing portion 63 extends to the light emitting surface 20 </ b> D (back surface) of the light guide plate 20 and the back side of the reflecting member 40.

  The light blocking member 70 passes through the container 31 without passing through the wavelength conversion member 30 from the light source 10 and is in contact with the light emitting surface 20B of the light guide plate 20, that is, the light ν3 directed toward the light emitting surface 20B or the light emitting surface 20D. It is provided on the optical path.

  That is, as shown in FIG. 5, when the light shielding member 70 is not provided, the light ν3 enters the optical sheet 50 through the gap between the fixing member 60 and the frame-shaped member 80, and is directly exposed to the outside. There is a risk of going out. In this case, the light ν3 is not subjected to wavelength conversion by the wavelength conversion member 30, and is not mixed with the wavelength-converted green light or red light inside the light guide plate 20, and thus is generated from the light source 10. Blue light as it is. Therefore, as schematically shown in FIG. 6, when the light emitting device 1 is viewed from the front side of the optical sheet 50, the strong blue color unevenness B caused by the light ν <b> 3 along the left and right sides where the light source 10 is provided. Is observed.

  The location 31A where the light ν3 that causes such color unevenness B is emitted from the container 31 can be obtained by giving specific numerical values of the dimensions and positional relationships of the light source 10, the light guide plate 20, and the wavelength conversion member 30. It is possible to specify based on For example, as shown in FIG. 7, the dimension t1 from the upper end to the lower end of the container 31 is 4 mm, the thickness t2 of the light guide plate 20 is 3.5 mm, and the maximum thickness t3 of the wavelength conversion member 30 is 2.7 mm. The distance L1 between the light emission center 10A of the light source 10 and the container 31 is 0.6 mm, the thickness L2 in the left-right direction of the container 31 is 2 mm, and the distance L3 between the container 31 and the light incident surface 20A is 1.4 mm. The thickness (difference between the outer diameter and inner diameter) R of the container 31 is 1 mm, and the refractive index n of the container 31 is 1.51.

  In this case, the emission position 31A of the light ν3 that causes the color unevenness B has a horizontal distance L from the light emission center 10A of the light source 10 of 1.95 mm to 2.16 mm, as shown in FIG. The distance t is limited to the range of 1.83 mm to 1.94 mm. Therefore, by providing the light shielding member 70 based on such a calculation result, the light ν3 can be shielded and the color unevenness B can be suppressed. In FIG. 8, the emission portion 31 </ b> A of the light ν <b> 3 that causes the color unevenness B is represented by a line thicker than the outline of the container 31.

  Specifically, the light shielding member 70 is preferably a light shielding protrusion 71 provided on the second fixing portion 62 and the third fixing portion 63 of the fixing member 60 as shown in FIG. By doing so, it becomes possible to block the light ν3 at a position very close to the emission position of the light ν3 that causes the color unevenness B, and it is possible to reliably suppress the occurrence of the color unevenness B. Further, the light shielding member 70 can be easily formed in the manufacturing process of the fixing member 60 made of a resin component.

  Further, the light shielding member 70 is preferably a light shielding protrusion 72 provided on the frame member 80 as shown in the light emitting device 1B of FIG. In this case, the light shielding member 70 can be easily formed in the manufacturing process of the frame-shaped member 80 made of a resin component.

  Further, as shown in the light emitting device 1C of FIG. 10, the light shielding member 70 is a light shielding cushion 73 that covers a surface that contacts the light incident surface 20A of the light guide plate 20, specifically, an end portion of the light emitting surface 20B. It is also preferable. In this case, unlike the light shielding protrusions 71 and 72 shown in FIG. 4 or FIG. 9, it is possible to suppress the light from being kicked by the light shielding protrusions 71 and 72, thereby further improving the light use efficiency. It becomes possible. The light shielding cushion 73 is preferably sandwiched between the frame-shaped member 80 and the light emitting surface 20B of the light guide plate 20. Thereby, the mechanical clearance between the frame-shaped member 80 and the light guide plate 20 is adjusted, or the sound generated when the frame-shaped member 80 and the light guide plate 20 made of different materials come into contact with each other is reduced. It becomes possible. As a constituent material of the light-shielding cushion 73, for example, urethane foam (“PORON (registered trademark)” manufactured by Roger Sinoac Co., Ltd.) is preferable.

  In addition, as shown in the light emitting device 1D of FIG. 11, the optical sheet 50 is opposite to the light shielding cushion 73 with respect to the frame member 80 (on the upper side of the frame member 80, that is, on the front side (light emission observation surface side)). If it is provided, it is more preferable. This is because the width of the light shielding cushion 73 can be made wider than that in FIG. 10, and the light shielding cushion 73 can be easily attached.

  Furthermore, as shown in the light emitting device 1E of FIG. 12, the light emitting surface 20D (back surface) side of the light guide plate 20, specifically, between the reflecting member 40 and the third fixing portion 63 of the fixing member 60, It is also preferable to provide a lower cushion 74. By doing in this way, the light which passes the container 31 without passing through the wavelength conversion member 30 from the light source 10, and contacts the light emission surface 20D of the light guide plate 20, that is, the light which goes to the light emission surface 20D is shielded. Color unevenness caused by light can be suppressed. Further, the lower cushion 74 has a clearance adjustment function and a noise prevention function similar to those of the light shielding cushion 73 described above in addition to light shielding. As a constituent material of the lower cushion 74, for example, polyethylene foam (“Super Opcell (registered trademark)” manufactured by Sanwa Processing Co., Ltd.) is preferable.

  In addition, as shown in FIGS. 4 and 9 to 12, it is preferable that the end 41 of the reflecting member 40 protrudes from the light guide plate 20 toward the light source 10. Thereby, the light passing through the container 31 without passing through the wavelength conversion member 30 from the light source 10 and contacting the light exit surface 20D of the light guide plate 20, that is, the light traveling toward the light exit surface 20D is shielded, and this light is caused. Color unevenness can be suppressed. Further, a higher effect can be obtained by the combination with the light shielding protrusion 71 of the third fixing portion 63 shown in FIG. 4 or the combination with the lower cushion 74 shown in FIG.

  In the light emitting devices 1A to 1E, similarly to the first embodiment, the light emitted from the light source 10 is wavelength-converted by the wavelength conversion member 30, enters the light incident surface 20A of the light guide plate 20, and the light guide plate 20 The light travels inside, exits from the light exit surface 20B, passes through the optical sheet 50, and is observed as light emission.

  At this time, light ν3 that passes from the light source 10 through the container 31 without passing through the wavelength conversion member 30 and travels toward the surface (light emitting surface 20B or 20D) that contacts the light incident surface 20A of the light guide plate 20 is generated. . The light ν3 passes through the gap between the fixing member 60 and the frame-shaped member 80, passes through the optical sheet 50, and exits to the outside, causing the bluish color unevenness B as shown in FIG. There is a risk of becoming. Here, since the light shielding member 70 is provided on the optical path of the light ν3, the light ν3 causing the color unevenness B is shielded by the light shielding member 70, and the in-plane color uniformity is obtained. Further improvement.

  As shown in FIGS. 4 and 9 to 12, the light source 10 passes through the container 31 without passing through the wavelength conversion member 30, and passes through a gap between the fixing member 60 and the frame-shaped member 80. In addition, there is also light ν4 incident on the light incident surface 20A of the light guide plate 20. However, since such light ν4 is mixed with the wavelength-converted light in the light guide plate 20, there is little possibility of causing a major problem such as color unevenness B caused by the light ν3. In addition, when the light ν3 is incident on the light exit surface 20B or the light exit surface 20D of the light guide plate 20, the wavelength-converted light is mixed with the inside of the light guide plate 20, and the problem of color unevenness B is alleviated.

  As described above, in the present embodiment, the light source 10 passes through the container 31 without passing through the wavelength conversion member 30 and contacts the light exit surface 20D of the light guide plate 20, that is, the light exit surface 20B or the light exit surface 20D. Since the light blocking member 70 is provided on the optical path of the light ν3 that travels, it is possible to block the light ν3 that causes color unevenness and further improve the in-plane color uniformity.

(Third embodiment)
FIG. 13 illustrates an appearance of the display device 101 according to the third embodiment of the present disclosure. The display device 101 is used as, for example, a thin television device, and has a configuration in which a flat main body 102 for image display is supported by a stand 103. The display device 101 is used as a stationary type with the stand 103 attached to the main body 102 and placed on a horizontal surface such as a floor, a shelf, or a stand, but the stand 103 is removed from the main body 102. It can also be used as a wall-hanging type.

  FIG. 14 is an exploded view of the main body 102 shown in FIG. The main body 102 has, for example, a front exterior member (bezel) 111, a panel module 112, and a rear exterior member (rear cover) 113 in this order from the front side (viewer side). The front exterior member 111 is a frame-shaped member that covers the peripheral edge of the front surface of the panel module 112, and a pair of speakers 114 are disposed below the front exterior member 111. The panel module 112 is fixed to the front exterior member 111, and a power supply board 115 and a signal board 116 are mounted on the rear surface thereof, and a mounting bracket 117 is fixed. The mounting bracket 117 is for mounting a wall-mounted bracket, mounting a board, etc., and mounting the stand 103. The rear exterior member 113 covers the back and side surfaces of the panel module 112.

  FIG. 15 is an exploded view of the panel module 112 shown in FIG. The panel module 112 includes, for example, a front housing (top chassis) 121, a liquid crystal panel 122, a frame-shaped member (middle chassis) 80, an optical sheet 50, a light guide plate 20, and a reflecting member 40 from the front side (viewer side). , A rear housing (back chassis) 124, a balancer board 125, a balancer cover 126, and a timing controller board 127 in this order.

  The front housing 121 is a frame-shaped metal part that covers the front peripheral edge of the liquid crystal panel 122. The liquid crystal panel 122 includes, for example, a liquid crystal cell 122A, a source substrate 122B, and a flexible substrate 122C such as COF (Chip On Film) that connects them. The frame-shaped member 123 is a frame-shaped resin component that holds the liquid crystal panel 122 and the optical sheet 50. The rear housing 124 is a metal part made of iron (Fe) or the like that houses the liquid crystal panel 122, the frame-shaped member 80, and the light emitting device 1. The balancer substrate 125 controls the light emitting device 1 and is mounted on the back surface of the rear housing 124 and covered with a balancer cover 126 as shown in FIG. The timing controller board 127 is also mounted on the back surface of the rear housing 124.

  In the display device 101, light from the light emitting device 1 is selectively transmitted through the liquid crystal panel 122, thereby displaying an image. Here, as described in the first embodiment, since the light emitting device 1 with improved in-plane color uniformity is provided, the display quality of the display device 101 is improved.

  In addition, although the said embodiment demonstrated the case where the display apparatus 101 was equipped with the light-emitting device 1 which concerns on 1st Embodiment, the display apparatus 101 is the light-emitting device 1 which concerns on 1st Embodiment. Instead, it goes without saying that any one of the light emitting devices 1A to 1E according to the second embodiment may be provided.

(Application example of display device)
Hereinafter, application examples of the display device 101 as described above to an electronic device will be described. Examples of the electronic device include a television device, a digital camera, a notebook personal computer, a mobile terminal device such as a mobile phone, or a video camera. In other words, the display device can be applied to electronic devices in various fields that display a video signal input from the outside or a video signal generated inside as an image or video.

(Application example 1)
16A and 16B illustrate the appearance of an electronic book to which the display device 101 of the above embodiment is applied. The electronic book has, for example, a display unit 210 and a non-display unit 220, and the display unit 210 is configured by the display device 101 of the above embodiment.

(Application example 2)
FIG. 17 illustrates an appearance of a smartphone to which the display device 101 according to the above embodiment is applied. This smartphone has, for example, a display unit 230 and a non-display unit 240, and the display unit 230 is configured by the display device 101 of the above embodiment.

(Application example 3)
FIG. 18 illustrates an appearance of a digital camera to which the display device 101 according to the above embodiment is applied. The digital camera includes, for example, a flash light emitting unit 410, a display unit 420, a menu switch 430, and a shutter button 440, and the display unit 420 is configured by the display device 101 of the above embodiment.

(Application example 4)
FIG. 19 shows an appearance of a notebook personal computer to which the display device 101 of the above embodiment is applied. The notebook personal computer has, for example, a main body 510, a keyboard 520 for inputting characters and the like, and a display unit 530 for displaying an image. The display unit 530 is provided by the display device 101 of the above embodiment. It is configured.

(Application example 5)
FIG. 20 shows the appearance of a video camera to which the display device 101 of the above embodiment is applied. This video camera includes, for example, a main body 610, a subject photographing lens 620 provided on the front side surface of the main body 610, a start / stop switch 630 at the time of photographing, and a display 640. And this display part 640 is comprised by the display apparatus 101 of the said embodiment.

(Application example 6)
FIG. 21 illustrates an appearance of a mobile phone to which the display device 101 of the above embodiment is applied. For example, the mobile phone is obtained by connecting an upper housing 710 and a lower housing 720 with a connecting portion (hinge portion) 730, and includes a display 740, a sub-display 750, a picture light 760, and a camera 770. Yes. Of these, the display 740 or the sub-display 750 is configured by the display device 101 of the above embodiment.

(Application example of lighting device)
22 and FIG. 23 show the appearance of a tabletop lighting device to which the light-emitting devices 1 and 1A to 1E of the above-described embodiment are applied. This illuminating device is, for example, one in which an illuminating unit 843 is attached to a support column 842 provided on a base 841, and the illuminating unit 843 includes the light emitting devices 1 and 2 according to the first and second embodiments. It is comprised by either 1A-1E. The illumination unit 843 can have an arbitrary shape such as a cylindrical shape shown in FIG. 22 or a curved shape shown in FIG. 23 by making the light guide plate 20 into a curved shape.

  FIG. 24 illustrates an appearance of an indoor lighting device to which the light-emitting devices 1 and 1A to 1E according to the above-described embodiments are applied. This illuminating device has the illumination part 844 comprised by either of the light-emitting devices 1 and 1A-1E which concern on the said embodiment, for example. The illumination units 844 are arranged at an appropriate number and interval on the ceiling 850A of the building. Note that the lighting unit 844 can be installed not only in the ceiling 850A but also in an arbitrary place such as a wall 850B or a floor (not shown) depending on the application.

  In these illumination devices, illumination is performed by light from the light emitting device 1. Here, as described in the first embodiment, since the light emitting device 1 with improved in-plane color uniformity is provided, the illumination quality is improved.

  While the present disclosure has been described with reference to the embodiment, the present disclosure is not limited to the above embodiment, and various modifications can be made. For example, the material and thickness of each layer described in the above embodiment are not limited, and other materials and thicknesses may be used.

  For example, although the case where the light source 10 is LED was demonstrated in the said embodiment, the light source 10 may be comprised with the semiconductor laser.

  Further, for example, the configuration of the light emitting devices 1 and 1A to 1E and the display device 101 (television device) has been specifically described in the above embodiment, but it is not necessary to include all the components. These components may be further provided.

  In addition, although the case where the wavelength conversion member 30 was enclosed in the container 31 was described in the above embodiment, the wavelength conversion member 30 is a sheet-like member in which a fluorescent substance or quantum dots are dispersed in a resin sheet. Also good.

  Furthermore, in the above-described embodiment, the edge light type light emitting device 1 in which the light from the light source 10 is incident on the light incident surface 20A on the end surface of the light guide plate 20 and is emitted toward the front from the light emitting surface 20B has been described. However, the present disclosure can also be applied to a direct light emitting device in which the light sources 10 are arranged in a plane and a diffusion plate is disposed as an optical component above the light source 10.

In addition, this technique can also take the following structures.
(1)
A light source;
An optical component having a light incident surface facing the light source;
A wavelength conversion member provided between the light source and the light incident surface;
The wavelength conversion member traverses a region surrounded by the light path of the light incident on the end of the light incident surface from the light source and the light incident surface, and extends to an outer region beyond the region. apparatus.
(2)
The light emitting device according to (1), further including a container that accommodates the wavelength conversion member.
(3)
A light shielding member,
The said light shielding member is provided on the optical path of the light which goes through the said container without passing through the said wavelength conversion member from the said light source, and goes to the surface which touches the said light-incidence surface of the said optical component. Light-emitting device.
(4)
The light-emitting device according to (3), wherein the light-shielding member is a light-shielding cushion that covers an end portion of a surface that contacts the light incident surface of the optical component.
(5)
An optical sheet provided on a surface in contact with the light incident surface of the optical component;
A frame-like member that holds the optical sheet,
The display device according to (4), wherein the light-shielding cushion is sandwiched between the frame-shaped member and the optical component.
(6)
The display device according to (5), wherein the optical sheet is provided on a side opposite to the light shielding cushion with respect to the frame-shaped member.
(7)
A fixing member for holding the container;
The light-emitting device according to (3), wherein the light-shielding member is a light-shielding protrusion provided on the fixing member.
(8)
An optical sheet provided on a surface in contact with the light incident surface of the optical component;
A frame-like member that holds the optical sheet,
The light-emitting device according to (3), wherein the light-shielding member is a light-shielding protrusion provided on the frame-shaped member.
(9)
The light-emitting device according to any one of (1) to (8), wherein the light source is a point light source.
(10)
The light emitting device according to any one of (1) to (9), wherein the wavelength conversion member includes a fluorescent material.
(11)
The light emitting device according to (10), wherein the wavelength conversion member includes quantum dots.
(12)
The light-emitting device according to any one of (1) to (11), wherein the light source is a blue light source.
(13)
The light source is configured by a light emitting diode.
(14)
The optical component is a light guide plate,
The light-emitting device according to any one of (1) to (13), wherein the light incident surface is an end surface of the light guide plate.
(15)
A liquid crystal panel, and a light emitting device on the back side of the liquid crystal panel,
The light emitting device
A light source;
An optical component having a light incident surface facing the light source;
A wavelength conversion member provided between the light source and the light incident surface;
The wavelength conversion member crosses a region surrounded by the light path of the light incident on the end of the light incident surface from the light source and the light incident surface, and extends to an outer region beyond the region. apparatus.
(16)
With a light emitting device,
The light emitting device
A light source;
An optical component having a light incident surface facing the light source;
A wavelength conversion member provided between the light source and the light incident surface;
The wavelength conversion member traverses a region surrounded by the light path of light incident on the end of the light incident surface from the light source and the light incident surface, and extends to an outer region beyond the region. apparatus.

  DESCRIPTION OF SYMBOLS 1,1A-1E ... Light-emitting device, 10 ... Light source, 10A ... Light emission center, 11 ... Package, 12 ... Light source board, 20 ... Light guide plate, 20A ... Light incident surface, 20B, 20D ... Light-emitting surface, 20C ... Convex part 20E ... upper end, 20F ... lower end, 30 ... wavelength conversion member, 31 ... container, 40 ... reflection member, 41 ... end part, 50 ... optical sheet, 60 ... fixing member, 61 ... first fixing part, 61A ... outer surface, 61B ... inner surface, 61C ... opening, 61D ... seat part, 62 ... second fixing part, 63 ... third fixing part, 70 ... light shielding member, 71, 72 ... light shielding projection, 73 ... light shielding cushion, 74 ... lower side Cushion, 80 ... frame-like member, 101 ... display device.

Claims (14)

A display panel, and a light emitting device on the back side of the display panel,
The light emitting device
A light source that emits blue light;
An optical component having a light incident surface facing the light source and extending in the left-right direction;
A wavelength conversion member that is provided between the light source and the light incident surface and converts the wavelength of at least part of the blue light from the light source into red light or green light;
A container that extends in the left-right direction and contains the wavelength conversion member among the light source, the optical component, and the wavelength conversion member ;
The wavelength conversion member crosses a region surrounded by the light path and the light incident surface of light incident on the upper and lower ends of the light incident surface from the light source, and extends to an outer region beyond the region. Display device. The display device according to claim 1, wherein the display panel is a liquid crystal display panel. A light shielding member,
The light shielding member is provided on an optical path of light from the light source that passes through the container without passing through the wavelength conversion member and travels toward a surface that contacts the light incident surface of the optical component. Item 3. The display device according to Item 2. The display device according to claim 3, wherein the light shielding member is a light shielding cushion that covers an end of a surface of the optical component that is in contact with the light incident surface. An optical sheet provided on a surface in contact with the light incident surface of the optical component;
A frame-like member that holds the optical sheet,
The display device according to claim 4, wherein the light shielding cushion is sandwiched between the frame-shaped member and the optical component. The display device according to claim 1, wherein the wavelength conversion member includes a fluorescent material. The display device according to claim 1, wherein the wavelength conversion member includes quantum dots. The optical component is a light guide plate,
The display device according to claim 7, wherein the light incident surface is an end surface of the light guide plate. The light guide plate includes an uneven surface facing the display panel,
The display device according to claim 8, wherein the uneven surface is provided perpendicular to the light incident surface. The display device according to claim 1, wherein the light emitting device is a direct type. A liquid crystal panel, and a light emitting device on the back side of the liquid crystal panel,
The light emitting device
A light source;
A light guide plate having a first light incident surface facing the light source and extending in the left-right direction, and having a concavo-convex surface facing the liquid crystal panel and perpendicular to the first light incident surface;
Quantum dots provided between the light source and the first light incident surface;
A container that extends in the left-right direction and contains the quantum dots among the light source, the light guide plate, and the quantum dots , and
The quantum dots traverse a region surrounded by an optical path of light incident on an upper end and a lower end of the first light incident surface from the light source and the first light incident surface, and extend to an outer region beyond the region. Existing display device. The light guide plate has a second light incident surface that faces the first light incident surface and extends in the left-right direction;
The second light incident surface is provided to face the second light source;
The display device according to claim 11, wherein the first light incident surface and the second light incident surface are end surfaces of the light guide plate. The display device according to claim 11, further comprising at least one fixing member that holds the container by sandwiching an upper end and a lower end of the container. The display device according to claim 1, wherein the container is tubular.

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