Display device

Abstract

To provide a technique which can inhibit an outer periphery part of a lighting device from looking blue in a display device (a backlight device) having the direct-lit lighting device using a light source which emits blue light.SOLUTION: A backlight device includes: a plurality of light sources 60 disposed on the upper side of a flexible substrate 61 and configured to emit blue light; a resin layer 40 provided so as to cover the upper side of the flexible substrate and the plurality of light sources; an optical sheet group 50 provided on the upper side of the resin layer and including a color conversion sheet; and a resin wall 70 provided so as to cover entire outer peripheries of the flexible substrate, the resin layer, and the optical sheet group in a plan view and having an outer wall and an inner wall facing the outer wall. In the backlight device, a color conversion part is provided at a path of light which is radiated to the inner wall of the outer wall without passing through the color conversion sheet of the optical sheet group and reflected on the inner wall to enter a side surface of the optical sheet group and be emitted from an emission surface of the optical sheet group.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a display device, and more particularly to a display device having a direct backlight device. [Background technology]

[0002] A technology has been proposed to suppress color unevenness in edge-lit or direct-type lighting devices (backlight devices) (Japanese Patent Application Laid-Open No. 2018-166118).

[0003] Japanese Patent Application Laid-Open No. 2018-166118 proposes an edge-light type lighting device, for example, as follows: "An end surface wavelength conversion member is superimposed on at least a part of the non-light-entering end surface of the light guide plate, and light that is present in the outer peripheral portion of the light guide plate and is emitted from the non-light-entering end surface is wavelength-converted by the phosphor contained in the end surface wavelength conversion member. Furthermore, the light that has passed through the end surface wavelength conversion member is reflected by an end surface reflecting member that is disposed on the opposite side of the end surface wavelength conversion member from the non-light-entering end surface side and that is superimposed on the end surface wavelength conversion member, and is returned to the end surface wavelength conversion member side." "The light is reflected by the end surface wavelength conversion member, enters the non-light-entering end surface, and is then emitted from the light-exiting plate surface. Therefore, even if the number of reflections during retroreflection is small, light present in the outer peripheral portion of the light guide plate is sufficiently wavelength-converted by the end surface wavelength conversion member when it exits from the non-light-entering end surface. In addition, the end surface reflecting member returns the light to the light guide plate side so that it does not exit directly from the non-light-entering end surface to the outside. This makes it less likely that a difference will occur in the color of the emitted light between the center and outer peripheral sides of the lighting device, thereby suppressing the occurrence of color unevenness and improving light utilization efficiency."

[0004] Furthermore, Japanese Patent Application Laid-Open No. 2018-166118 proposes a direct-type lighting device, and discloses, for example, that "if gaps occur between components on the outer periphery of the lighting device, blue light that is not wavelength-converted may leak out through the gaps, causing the emitted light of the lighting device to be more blue-tinged on the outer periphery than on the central side. In response to this, a portion of the light present near the outer periphery of the wavelength conversion member can be retroreflected in the direction opposite to the light-emitting side by the retroreflecting portion, and the retroreflected light can be transmitted back through the wavelength conversion member to promote wavelength conversion. As a result, even if light leaks out through such gaps, the emitted light on the outer periphery of the lighting device is less likely to be bluish, thereby suppressing color unevenness." [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-166118 Summary of the Invention [Problem to be solved by the invention]

[0006] The present inventors have discovered that a direct-type lighting device (backlight device) using a light-emitting diode (LED) that emits blue light as a light source has a problem in that the blue light is reflected off the outer wall of the mold of the lighting device, making the periphery of the lighting device appear blue. As a result, even if there is an area on the periphery of the display area of ​​the display device where white is intended to be displayed, the area appears bluish. Therefore, when a local dimming operation is used to display white in the periphery of the display area of ​​the display device and deep black in the inner area, the periphery of the display area appears bluish, making it impossible to achieve high contrast.

[0007] The object of the present disclosure is to provide a technology that can prevent the outer periphery of a direct-type lighting device (backlight device) that uses a light source that emits blue light from appearing blue in a display device that has such a lighting device.

[0008] Other objects and novel features will become apparent from the description of this specification and the accompanying drawings. [Means for solving the problem]

[0009] A brief summary of the representative aspects of the present invention is as follows.

[0010] That is, the display device is A display panel; a backlight device provided below the rear surface of the display panel and configured to emit backlight to the display panel; The backlight device A flexible substrate; a plurality of light sources that are disposed above the flexible substrate and emit blue light; a resin layer provided to cover an upper side of the flexible substrate and the plurality of light sources; a group of optical sheets provided on the resin layer and including a color conversion sheet; a resin wall that is provided so as to cover the entire periphery of the flexible substrate, the resin layer, and the optical sheet group in a plan view, and that has an outer wall and an inner wall facing the outer wall; The backlight device further includes a color conversion unit on a path along which the light is irradiated onto the inner wall of the outer wall without passing through the color conversion sheet of the optical sheet group, and the light reflected by the inner wall enters from the side of the optical sheet group and exits from the exit surface of the optical sheet group. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a plan view of a display device according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the display device of FIG. [Figure 3] FIG. 3 is a plan view showing an example of the configuration of segments in the display device of FIG. 1 in the case of a local dimming operation. [Figure 4] FIG. 4 is a plan view showing a configuration example in which four LEDs are arranged in one segment of FIG. [Figure 5] FIG. 5 is a cross-sectional view of the outer periphery of the backlight device according to the first embodiment. [Figure 6] FIG. 6 is a cross-sectional view of the outer periphery of a backlight device according to a comparative example. [Figure 7] FIG. 7 is a cross-sectional view of the outer periphery of the backlight device according to the second embodiment. [Figure 8] FIG. 8 is a cross-sectional view of the outer periphery of the backlight device according to the third embodiment. [Figure 9] FIG. 9 is a cross-sectional view of the outer periphery of the backlight device according to the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0013] The disclosure is merely an example, and any appropriate modifications that a person skilled in the art can easily make while maintaining the gist of the invention are naturally included within the scope of the present invention. In addition, the drawings may show the width, thickness, shape, etc. of each part schematically compared to the actual embodiment in order to make the explanation clearer, but these are merely examples and do not limit the interpretation of the present invention.

[0014] In this embodiment, a liquid crystal display device is disclosed as an example of a display device, which can be used in various devices such as smartphones, tablet terminals, mobile phone terminals, personal computers, television receivers, in-vehicle devices, and game consoles.

[0015] (Embodiment) Fig. 1 is a plan view of a display device according to an embodiment. In Fig. 1, the display device (liquid crystal display device) 1 has a configuration in which a TFT substrate 100 and a counter substrate 200 are bonded with a sealant 16, with liquid crystal sandwiched therebetween. A display area 14 is formed in the area where the TFT substrate 100 and the counter substrate 200 overlap. In the display area 14, scanning lines 11 extend in the horizontal direction (x direction) and are arranged in the vertical direction (y direction). Video signal lines 12 extend in the vertical direction and are arranged in the horizontal direction. Pixels 13 are formed in the area surrounded by the scanning lines 11 and the video signal lines 12.

[0016] 1, the portion where the TFT substrate 100 does not overlap with the counter substrate 200 is a terminal region 15. A flexible wiring substrate 17 is connected to the terminal region 15 to supply power and signals to the liquid crystal display panel. A driver IC that drives the liquid crystal display panel is mounted on the flexible wiring substrate 17. In the display device 1, a backlight device 20 is disposed on the back surface of the TFT substrate 100 as an illumination device, as shown in FIG.

[0017] Fig. 2 is a cross-sectional view of the display device of Fig. 1. In the display device 1 of Fig. 2, a backlight device 20 is disposed on the back surface of a liquid crystal display panel 10. The liquid crystal display panel 10 has the following configuration: a counter substrate 200, on which a black matrix and color filters are formed, is disposed opposite a TFT substrate 100, on which pixel electrodes, common electrodes, TFTs, scanning lines, video signal lines, etc. are formed. The TFT substrate 100 and the counter substrate 200 are bonded together at their peripheries with a sealant 16, and liquid crystal 300 is sealed inside.

[0018] The liquid crystal molecules are initially aligned by alignment films formed on the TFT substrate 100 and the counter substrate 200. When a voltage is applied between the pixel electrode and the common electrode, the liquid crystal molecules rotate, and an image is formed by controlling the light from the backlight device 20 for each pixel. Since the liquid crystal 300 can only control polarized light, a lower polarizer 101 is placed below the TFT substrate 100, and only polarized light is incident on the liquid crystal 300. The light modulated by the liquid crystal 300 is analyzed by the upper polarizer 201, and an image is visible.

[0019] In Fig. 2, a backlight device 20 is disposed on the back surface of a liquid crystal display panel 10. The backlight device 20 is configured to be able to irradiate backlight onto a display area 14 of the display panel 10. The backlight device 20 is configured such that a resin layer 40 is disposed on a light source 30, and a group of optical sheets 50 is disposed on top of that. Fig. 2 is an example, and the resin layer 40 is not essential.

[0020] 2 is made of a transparent resin and serves to properly set the distance between the light source 30 and the liquid crystal display panel 10. In addition, the resin layer 40 in Fig. 2 serves to homogenize the light from the LED, which is a point light source, by reflecting the light incident on the resin layer 40 at the interface.

[0021] A group of optical sheets 50 is disposed on the resin layer 40. The group of optical sheets 50 may include a prism sheet, a diffusion sheet, etc. In addition, in order to obtain white light using a blue LED or the like as a light source, a color conversion sheet in which phosphors are dispersed in a resin sheet or a sheet using quantum dots may be used. Also, in order to improve the efficiency of use of light from the backlight device 20, a polarized reflection sheet may be used. The type of optical sheet to be used or the number of such optical sheets to be used is determined depending on the display device.

[0022] When an image is displayed on the liquid crystal display device 1, light from the backlight device 20 passes through bright areas, while light from the backlight device 20 is blocked by dark areas. The contrast of the image is defined by the ratio between the bright and dark areas. In the liquid crystal display device 1, dark areas are formed by blocking light from the backlight device 20 using liquid crystal. However, the liquid crystal does not completely block light from the backlight device 20, and some light leaks through. This reduces the contrast.

[0023] Local dimming enables deep black display by not irradiating dark areas with light from the backlight device 20. Therefore, high contrast can be achieved. FIG. 3 is a plan view showing an example of the segment configuration in the case of local dimming operation in the display device of FIG. 1. In FIG. 3, the display area 14 is divided by multiple segments 141. The dotted lines in FIG. 3 indicate the boundaries of the segments 141, but these are drawn for convenience, and the liquid crystal display panel 10 does not have such boundaries. Light sources in the backlight are arranged at positions corresponding to each segment.

[0024] In Figure 3, segment (4, 2) is a bright area, and segment (5, 2) is a dark area. With local dimming, the light source for segment (4, 2), i.e., the LED, is turned on, and the light source for segment (5, 2), i.e., the LED, is not turned on. This results in a deep black display in segment (5, 2), achieving high contrast.

[0025] FIG. 4 is a plan view showing a configuration example in which four LEDs 60 are arranged as light sources in one segment of FIG. 3. FIG. 4 is a plan view showing a case in which four LEDs 60 are arranged as light sources in each segment 141 in the backlight device 20. Hereinafter, the light sources will be referred to as LEDs 60. In FIG. 4, each segment 141 is divided by a dotted line. However, this dotted line is for convenience and does not actually divide the segments. The size of each segment 141 is 4 mm square or less, for example, 2 mm square. In FIG. 4, four LEDs 60 are arranged in each segment 141. In other words, by arranging four LEDs 60 in a segment 141, the brightness of each LED can be reduced. As a result, the amount of light leaking into adjacent segments can also be reduced.

[0026] Next, cross-sectional views of the outer peripheral portion of backlight device 20 will be described with reference to Figures 5 to 9. Here, the cross-sectional views of the outer peripheral portion of backlight device 20 shown in Figures 5 to 9 are representative cross-sectional views of backlight device 20 at the portions indicated by arrows A, B, C, and D in Figure 3. In backlight device 20 having a rectangular shape in plan view, the four outer peripheral portions of backlight device 20 are provided in a frame shape so that molded resin walls 70 (701), which will be described later, overlap the underside of sealing material 16.

[0027] Example 1 FIG. 5 is a cross-sectional view of the peripheral portion of the backlight device according to the first embodiment. As shown in FIG. 5, the light source 30 includes a flexible printed circuit board (also referred to as a flexible substrate) 61 and a plurality of LEDs 60, such as blue LEDs, provided on the upper surface of the flexible printed circuit board 61. A light-transmitting resin layer 40 is provided to cover the LEDs 60 and the upper surface of the flexible printed circuit board 61. The resin layer 40 is made of, for example, an acrylic resin or a silicone resin. A group of optical sheets 50 is provided on the upper side of the resin layer 40. The group of optical sheets 50 includes, from bottom to top, a color conversion sheet 51, a lower diffusion sheet 52, a lower prism sheet 53, an upper prism sheet 54, and an upper diffusion sheet 55. The color conversion sheet 51 may be, for example, a resin sheet in which a phosphor is dispersed. The color conversion sheet 51 may also be replaced with a sheet using quantum dots (quantum dot sheet: QD sheet). QD sheets utilize QD particles as a surface light emitter, and as light energy from a backlight passes through the QD sheet, the QD particles convert the wavelength and emit it. QD materials are divided into cadmium-containing and cadmium-free types depending on whether they contain cadmium or not, but it is preferable to use the cadmium-free type.

[0028] A molded resin wall 70 having an outer wall 71 and an inner wall 72 facing the outer wall 71 is provided on the outer periphery of the backlight device 20. The molded resin wall 70 can also be referred to as a molded outer wall 70. A light-shielding tape 80 is provided on the upper side of the molded resin wall 70. In other words, the molded resin wall 70 is provided so as to cover the entire periphery of the flexible printed circuit board 61, the resin layer 40, and the optical sheet group 50 in a plan view.

[0029] Here, a color conversion layer 56 formed by applying a color conversion material to an inner wall 72 of the molded resin wall 70 is provided along the entire periphery of the inner wall 72. The color conversion material used for the color conversion layer 56 may be, for example, the QD material described above. The optical sheet group 50 has an incident surface 56 on the color conversion sheet 51 side, an exit surface 58 on the upper diffusion sheet 55 side, and a side surface 57 provided between the incident surface 56 and the exit surface 58. The side surface 57 is provided along the entire periphery of the outer periphery of the optical sheet group 50 in a plan view.

[0030] 5 , of the blue light emitted from the LEDs 60, light that passes through the color conversion sheet 51 is emitted from the backlight device 20 as white light 90. On the other hand, of the blue light emitted from the LEDs 60, blue light 91 that does not pass through the color conversion sheet 51 passes through the color conversion layer 56 provided on the inner wall 72 of the molded resin wall 70, is reflected by the inner wall 72 of the molded resin wall 70, and further passes through the color conversion layer 56 to be emitted from the backlight device 20 as white light 92. In other words, in the path 95 of the blue light 91 that does not pass through the color conversion sheet 51 and the light 92 that is reflected by the inner wall 72 of the molded resin wall 70 and is emitted from the group of optical sheets 50, the color conversion layer 56 is provided in the path 95 as a color conversion unit. In other words, blue light 91 is irradiated onto the inner wall 72 of the outer wall 70 without passing through the color conversion sheet 51 of the optical sheet group 50, and the color conversion layer 56 is provided on a path 95 along which the light reflected by the inner wall 72 enters from the side surface 57 of the optical sheet group 50 and exits from the exit surface 58 of the optical sheet group 50.

[0031] Therefore, the present invention provides a technology that can prevent the outer periphery of a direct-type illumination device using a light source that emits blue light from appearing blue in a display device having such a direct-type illumination device. Therefore, even if there is a portion on the outer periphery of the display area of ​​the display device where white is originally desired, the display can be made white. Therefore, when a local dimming operation is performed to display white in the outer periphery of the display area of ​​the display device and a deep black in the inner area, the outer periphery of the display area remains white, thereby achieving high contrast.

[0032] (Comparative Example) Fig. 6 is a cross-sectional view of the outer periphery of a backlight device according to a comparative example. The cross-sectional view of the outer periphery of backlight device 20 in Fig. 6 differs from that in Fig. 5 in that color conversion layer 56 is not provided on inner wall 72 of molded resin wall 70 in Fig. 6. The other configuration of backlight device 20 in Fig. 6 is the same as that of backlight device 20 in Fig. 5, so redundant explanations will be omitted.

[0033] In FIG. 6 , blue light 91 that does not pass through color conversion sheet 51 is reflected by inner wall 72 of molded resin wall 70, which serves as the mold outer wall, and is emitted as blue light 93 from the outer periphery of backlight device 20. In other words, blue light 91 is irradiated onto inner wall 72 of outer wall 70 without passing through color conversion sheet 51 of optical sheet group 50, and the light reflected by inner wall 72 enters side surface 57 of optical sheet group 50 and exits from exit surface 58 of optical sheet group 50. No color conversion unit is provided along path 95. This causes the outer periphery of backlight device 20 to appear blue. In other words, blue light 91 that does not pass through color conversion sheet 51, a color conversion material, leaks directly from the outer periphery of backlight device 20. Even if light-shielding tape 80 is provided on the outer periphery of backlight device 20, the outer periphery of the active area (here, active area refers to the area where color conversion sheet 51 is provided) inside the tape appears relatively blue.

[0034] On the other hand, in the backlight device 20 shown in FIG. 5, the color conversion layer 56 is provided around the entire periphery of the inner wall 72 of the molded resin wall 70, so the outer periphery of the backlight device 20 does not appear blue.

[0035] Example 2 Fig. 7 is a cross-sectional view of the outer periphery of a backlight device according to Example 2. The cross-sectional view of the outer periphery of the backlight device 20 in Fig. 7 differs from that in Fig. 5 in that, instead of the color conversion layer 56 on the inner wall 72 of the molded resin wall 70 in Fig. 5, an edge 511 on the outer periphery of the color conversion sheet 51 is bent downward along the entire periphery along the inner wall 72 of the molded resin wall 70. In this example, a lower end 512 of the edge 511 is configured to be positioned between the inner wall 72 of the molded resin wall 70 and the flexible printed circuit board 61. The other configurations of the backlight device 20 in Fig. 7 are the same as those of the backlight device 20 in Fig. 5, and therefore redundant description will be omitted.

[0036] In Example 2, blue light 91 that does not pass through color conversion sheet 51 also passes through outer peripheral edge 511 of color conversion sheet 51, which is folded downward along the entire circumference along inner wall 72 of molded resin wall 70, and is emitted from backlight device 20 as white light 92. That is, a color conversion unit is provided in path 95 between blue light 91 and light 92 reflected by inner wall 72 of molded resin wall 70 and emitted from optical sheet group 50. In other words, outer peripheral edge 511 of color conversion sheet 51 is provided midway along path 95, along which light reflected by inner wall 72 enters side surface 57 of optical sheet group 50 and exits from emission surface 58 of optical sheet group 50. The color conversion unit in Example 2 is configured by folding outer peripheral edge 511 of color conversion sheet 51 downward along the entire circumference along inner wall 72 of resin wall 70. Therefore, Example 2 can also achieve the same effects as Example 1.

[0037] Example 3 Fig. 8 is a cross-sectional view of the outer periphery of a backlight device according to Example 3. The cross-sectional view of the outer periphery of backlight device 20 in Fig. 8 differs from that in Fig. 5 in that, instead of color conversion layer 56 in inner wall 72 of molded resin wall 70 in Fig. 5, outer edge 513 of color conversion sheet 51 is inserted into opening (depression, recess) 73 provided around the entire periphery along inner wall 72 of molded resin wall 70. The other configuration of backlight device 20 in Fig. 8 is the same as that of backlight device 20 in Fig. 5, so repeated explanations will be omitted.

[0038] An opening 73 is provided in the molded resin wall 70, which also serves to secure the color conversion sheet 51. By inserting an end 513 of the color conversion sheet 51 into the opening 73, a sealed structure is formed against the blue light emitted from the LED 60. That is, a color conversion unit is provided in the path 95 between the blue light 91 and the light 92 reflected by the inner wall 72 of the molded resin wall 70 and emitted from the optical sheet group 50. In other words, the outer edge 513 of the color conversion sheet 51 is provided as a color conversion unit in the path 95 along which the light reflected by the inner wall 72 enters the side surface 57 of the optical sheet group 50 and exits from the emission surface 58 of the optical sheet group 50. The color conversion unit of Example 3 is configured by inserting the outer edge 513 of the color conversion sheet 51 into the opening 73 provided in the inner wall 72 of the resin wall 70. This configuration prevents leakage of light that does not pass through the color conversion sheet 51. Therefore, Example 3 can also achieve the same effects as Example 1.

[0039] Example 4 Fig. 9 is a cross-sectional view of the outer periphery of a backlight device according to Example 4. The cross-sectional view of the outer periphery of backlight device 20 in Fig. 9 differs from that in Fig. 5 in that, instead of color conversion layer 56 provided on inner wall 72 of molded resin wall 70 in Fig. 5, molded resin wall 701 provided around the entire outer periphery of backlight device 20 itself contains a color conversion material. The other configurations of backlight device 20 in Fig. 9 are the same as those of backlight device 20 in Fig. 5, so redundant explanations will be omitted.

[0040] Taking a molded resin wall made of resin such as PC (polycarbonate) as an example, molding is performed while mixing in a color conversion material. The molded resin wall 701 itself is excited by blue light 91 emitted from the LED 60 and glows, so light leaking from the periphery of the backlight device 20 becomes white light 92. That is, in a path 95 between the blue light 91 that does not pass through the color conversion sheet 51 and the light 92 that is reflected by the inner wall 72 of the molded resin wall 70 and emitted from the optical sheet group 50, the molded resin wall 701 containing the color conversion material as a color conversion section is provided in the path 95. In other words, the blue light 91 is irradiated onto the inner wall 72 of the outer wall 70 without passing through the color conversion sheet 51 of the optical sheet group 50, and the light reflected by the inner wall 72 enters the side surface 57 of the optical sheet group 50 and exits from the emission surface 58 of the optical sheet group 50. The outer peripheral edge 513 of the molded resin wall 701 containing the color conversion material as a color conversion section is provided in the path 95. Therefore, the fourth embodiment can also achieve the same effects as the first embodiment.

[0041] All display devices that can be implemented by a person skilled in the art by appropriately modifying the design of the display device described above as an embodiment of the present invention also fall within the scope of the present invention as long as they include the gist of the present invention.

[0042] Within the scope of the concept of the present invention, a person skilled in the art may conceive of various modifications and alterations, and it is understood that these modifications and alterations also fall within the scope of the present invention. For example, to the above-described embodiments, a person skilled in the art may appropriately add, delete, or modify components, or add, omit, or change conditions of steps, and these modifications are also included within the scope of the present invention as long as they maintain the gist of the present invention.

[0043] Furthermore, other effects and advantages brought about by the aspects described in this embodiment that are clear from the description in this specification or that can be appropriately thought of by a person skilled in the art are naturally understood to be brought about by the present invention.

[0044] Various inventions can be formed by appropriately combining multiple components disclosed in the above embodiments. For example, some components may be omitted from all components shown in the embodiments. Furthermore, components from different embodiments may be appropriately combined. [Explanation of symbols]

[0045] 1: display device, 10: liquid crystal display panel, 20: lighting device (backlight device), 30: light source, 40: resin layer, 50: group of optical sheets, 51: color conversion sheet, 56: color conversion layer, 60: LED (light source), 61: flexible printed circuit board (flexible board), 70: molded resin wall, 71: outer wall, 72: inner wall, 95: path, 701: molded resin wall containing color conversion material.

Claims

1. A display panel; a backlight device provided below the rear surface of the display panel and configured to emit backlight to the display panel; The backlight device A flexible substrate; a plurality of light sources that are disposed above the flexible substrate and emit blue light; a resin layer provided to cover an upper side of the flexible substrate and the plurality of light sources; a group of optical sheets provided on the resin layer and including a color conversion sheet; a resin wall that is provided so as to cover the entire periphery of the flexible substrate, the resin layer, and the optical sheet group in a plan view, and that has an outer wall and an inner wall facing the outer wall, The backlight device further includes a color conversion unit provided on a path along which the light is irradiated onto the inner wall of the outer wall without passing through the color conversion sheet of the optical sheet group, and the light reflected on the inner wall enters from a side surface of the optical sheet group and exits from an exit surface of the optical sheet group. Display device.

2. In claim 1, The display device, wherein the color conversion portion includes a color conversion layer provided on the entire periphery of the inner wall of the resin wall.

3. In claim 1, the color conversion unit is configured by folding an outer peripheral edge of the color conversion sheet downward along the entire periphery of the inner wall of the resin wall, The display device, wherein the end portion of the color conversion sheet is disposed between the inner wall of the resin wall and the flexible substrate.

4. In claim 1, The color conversion unit is configured by inserting an edge of the outer periphery of the color conversion sheet into an opening provided in the inner wall of the resin wall.

5. In claim 1, The display device, wherein the color conversion section is configured by the resin wall containing a color conversion material.

6. In claim 1, The display device, wherein the plurality of light sources include LEDs that emit blue light, and the backlight light is white light.

Images