Display device

Abstract

This display device has a cover glass having a plurality of through-holes, and a plurality of light-emitting diodes. Inside surfaces of the plurality of through-holes are each covered with a reflection layer, and the plurality of light-emitting diodes are respectively disposed within the plurality of through-holes in plan view. The cover glass has a first surface and a second surface located on the reverse side from the first surface, the plurality of through-holes have a first through-hole, the first through-hole includes a first opening provided in the first surface and a second opening provided in the second surface, and the width of the first opening may be narrower than the width of the second opening when viewed from an end surface passing the centers of the first opening and the second opening.

Description

[Technical field]

[0001] One embodiment of the present invention relates to a cover glass, a display device, and a manufacturing method thereof. In particular, the present invention relates to a display device equipped with a micro LED, and a manufacturing method thereof. [Background technology]

[0002] 2. Description of the Related Art As one type of display device, an LED display device equipped with a light emitting diode (LED) is known (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-92646 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of one embodiment of the present invention is to provide a cover glass having a novel structure, and a display device equipped with the cover glass and an LED. Another object is to provide a display device with high brightness. Another object is to provide a display device with high front brightness. Another object is to provide a display device with high efficiency. Another object is to provide a display device with low power consumption. Another object is to provide a thin and lightweight display device equipped with a cover glass. Another object is to simplify the manufacturing process of a display device equipped with a cover glass. [Means for solving the problem]

[0005] One embodiment of the present invention is a cover glass having a first surface, a second surface opposite to the first surface, a first through hole including a first opening provided in the first surface and a second opening provided in the second surface, and a reflective layer covering the inner surface of the first through hole.

[0006] One embodiment of the present invention is a display device comprising a cover glass having a plurality of through holes, and a plurality of light emitting diodes, inner surfaces of the plurality of through holes being covered with a reflective layer, and the plurality of light emitting diodes being disposed within the plurality of through holes in a plan view. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Diagram 2] 1 is a schematic end view of a display device according to an embodiment of the present invention; [Diagram 3] 1 is a schematic end view of a display device according to an embodiment of the present invention; [Figure 4] 1 is a schematic end view of a display device according to an embodiment of the present invention; [Diagram 5] 1 is a schematic end view of a display device according to an embodiment of the present invention; [Figure 6] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 7] 1 is a schematic end view of a display device according to an embodiment of the present invention; [Figure 8] 1 is a schematic end view of a display device according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, each embodiment of the present invention will be described with reference to the drawings, etc. However, the present invention can be embodied in various forms without departing from the spirit of the present invention, and the present invention should not be interpreted as being limited to the description of the embodiments exemplified below.

[0009] In order to clarify the explanation, the drawings may be slightly different in width, thickness, shape, etc. from the actual embodiment. In the present specification and drawings, elements having the same functions as those described in the previous drawings may be given the same reference numerals, and duplicated descriptions may be omitted.

[0010] In this specification and claims, when describing an aspect in which a structure is placed on top of another structure, the term "on top" is used, unless otherwise specified, to include both a case in which another structure is placed directly on top of a structure so as to be in contact with the structure, and a case in which another structure is placed above a structure via yet another structure.

[0011] In this specification and claims, the expression "a structure is exposed from another structure" means an embodiment in which a part of a structure is not covered by another structure, and includes an embodiment in which the part not covered by the other structure is covered by yet another structure.

[0012] In this specification and claims, the term "end view" refers to an object cut vertically and viewed from the side. An end view includes a view when viewed from the end. A "plan view" refers to an object viewed from directly above. A top view or plan view includes a view when viewed from the plan.

[0013] First Embodiment 1. Overall structure In this embodiment, the structure of a display device 100 according to an embodiment will be described. FIG. 1 is a schematic top view of the display device according to the embodiment. As shown in FIG. 1, the display device 100 has a substrate (not shown in the figure, a circuit substrate 130 described below), a cover glass 102, a flexible printed circuit board 104, and an IC chip 106 (Integrated Circuit chip). The display device 100 is divided into a display region 108, a peripheral region 110, and a terminal region 112.

[0014] A plurality of openings 114 including a plurality of LED chips are arranged in a row direction (X direction) and a column direction (Y direction) in the display region 108. The plurality of openings 114 can be arranged in a matrix, as shown in FIG.

[0015] The multiple openings 114 are provided in an area corresponding to the pixels of the display device 100. A single or multiple LED chips are provided in each of the multiple openings 114. The multiple LED chips may include, for example, LED chip 118R, LED chip 118G, and LED chip 118B, and as shown in FIG. 1, LED chip 118R, LED chip 118G, and LED chip 118B are arranged in the openings 114. The multiple LED chips 118 may be arranged at the apexes of a triangle as shown in FIG. 1, but they may be arranged to fit within the openings 114.

[0016] Furthermore, when multiple LED chips are provided in each opening 114 as described above, the color of light emitted by each LED chip can be red, blue, or green.

[0017] Furthermore, although not shown, the display device 100 may be provided with a single opening having a size equivalent to that of the opening 114 shown in Fig. 1 combined with an adjacent opening. That is, although the example shown in Fig. 1 shows an example in which the opening 114 is provided for each pixel of the display device 100, one opening may be provided for two or more pixels.

[0018] The shape of the multiple openings 114 may be circular or elliptical as shown in FIG. 1. The shape of the openings does not have to be a perfect circle. When the openings are circular, the length 122 of the openings may represent the length of a line segment that passes through the center of the circle and has both ends on the circumference of the opening. The length 122 of the openings may be, for example, in the range of 100 μm to 120 μm.

[0019] The multiple openings 114 can be openings of multiple through holes 124 that the cover glass 102 has, as shown in FIG. 1. Therefore, the multiple LED chips provided in the multiple openings 114 are arranged in the multiple through holes 124. Specifically, as shown in FIG. 1, the LED chip 118R, the LED chip 118G, and the LED chip 118B are arranged in the openings 114 and the through holes 124. The LED chips 118R, 118G, and 118B arranged in this manner can also be called multiple LED chips 118. Furthermore, as described above, the LED chips arranged in each opening 114 and each through hole 124 may be a single LED chip. For example, the LED chip 118G can be arranged in the through hole 124.

[0020] Furthermore, although not shown, the display device 100 may be provided with one through hole of a size in which the through hole 124 shown in Fig. 1 and an adjacent through hole are combined. That is, although the example in which the through hole 124 shown in Fig. 1 is provided for each pixel has been shown, one through hole may be provided for two or more pixels. Therefore, two or more LED chips 118R, two or more LED chips 118G, and two or more LED chips 118B may be provided in one through hole 124.

[0021] 1, the reflective layer 126 is disposed on the inner surfaces of the plurality of openings 114. Furthermore, a resin layer 128 is disposed inside the plurality of openings 114, as shown in FIG.

[0022] The peripheral region 110 is a region surrounding the display region 108. Although not shown, the peripheral region 110 is a region in which a driver circuit for controlling a pixel circuit provided in each pixel and a plurality of wirings connected from the driver circuit to the pixel circuit are provided.

[0023] The terminal area 112 is an area where a plurality of wirings connected to the driver circuit described above are gathered together. The flexible printed circuit board 104 is electrically connected to the plurality of wirings in the terminal area 112. A video signal (data signal) or a control signal output from an external device (not shown) is input to the IC chip 106 via wiring (not shown) provided on the flexible printed circuit board 104. The IC chip 106 performs various signal processing on the video signal and generates a control signal required for display control. The video signal and the control signal output from the IC chip 106 are input to the display device 100 via the flexible printed circuit board 104.

[0024] 2.Overall structure Fig. 2 is a schematic diagram of an end surface along the dashed line AA' shown in Fig. 1. As shown in Fig. 2, a plurality of LED chips 118 are provided on a circuit board 130. As described above, a plurality of through holes 124 are provided in the cover glass 102, and the plurality of LED chips 118 are disposed inside the plurality of through holes 124.

[0025] As described above, the cover glass 102 includes a plurality of through holes 124, and the inner surfaces 124-2 of the plurality of through holes 124 are covered with the reflective layer 126. In this case, the emitted light of the LED chip 118 passes through the through holes 124 and is extracted to the outside of the cover glass 102. Moreover, the diffused light out of the emitted light of the LED chip 118 is reflected by the reflective layer 126 covering the inner surfaces of the through holes, and is extracted to the outside of the cover glass 102.

[0026] The cover glass 102 is made of, for example, glass, quartz, etc. The material of the cover glass 102 may be a material that can be processed to form through-holes, for example, using a method such as a laser or glass etching.

[0027] The reflective layer 126 can be formed by adhering a metal film to the surface of the cover glass 102. The reflective layer 126 is formed by removing the metal film formed on the surface or rear surface of the cover glass 102 and leaving the metal film only on the inner surface of the through-hole 124. If the metal film is not removed from the surface or rear surface of the cover glass 102, an electric capacitance may be formed between the cover glass 102 and the circuit board 130. The thickness of the reflective layer 126 can be, for example, in the range of 1 μm to 3 μm.

[0028] The reflective layer 126 may be made of a material with high reflectivity. The reflective layer 126 may be made of a material with high water repellency. The reflective layer 126 may be made of a metal such as nickel or aluminum. The reflective layer 126 may be formed by processing a metal with high reflectivity to enhance water repellency. By using a material with high reflectivity for the reflective layer 126, the diffused light emitted from the LED chip 118 may be brought closer to parallel light, thereby increasing the light collection rate of the diffused light and improving the front brightness.

[0029] The through hole 124 includes a pair of openings. As shown in FIG. 2, the through hole 124 includes a first opening 132 and a second opening 134. The cover glass 102 includes a first surface 136 and a second surface 138 that is opposite the first surface 136 and faces the circuit board 130, and the first surface 136 and the second surface 138 are located on opposite sides. Thus, the first opening 132 of the through hole 124 can be provided in the first surface 136, and the second opening 134 of the through hole 124 can be provided in the second surface 138.

[0030] The second surface 138 of the cover glass 102 can be disposed below the semiconductor layer 118R-1 described later. By disposing the second surface 138 of the cover glass 102 below the entire semiconductor layer 118R-1 that is the light emitting portion, the reflective layer 126 can surround the semiconductor layer 118R-1 from the upper end to the lower end, and can effectively reflect the diffused light among the light emitted from the LED chip 118. In addition, with such an arrangement, the display device 100 can prevent light leakage in the lateral direction of the cover glass 102 or the circuit board 130. The display device 100 can reduce the light passing through the resin layer 128 disposed between the cover glass 102 and the circuit board 130 among the resin layers 128.

[0031] A resin layer 128 can be provided between the cover glass 102 and the circuit board 130. The resin layer 128 can be provided on the circuit board 130. The second surface of the cover glass 102 can be disposed on the resin layer 128. The resin layer 128 can be provided so as to contact the second surface 138. The thickness of the resin layer 128 located between the second surface 138 and the circuit board 130 can be adjusted by the temperature and pressure in the bonding process of the cover glass 102 and the circuit board 130, depending on the cover glass 102 and the circuit board 130. Furthermore, the resin layer 128 may be located inside the through hole 124. The thickness of the resin layer 128 located inside the through hole 124 is thicker than the thickness of the resin layer 128 located between the second surface 138 and the circuit board 130. Moreover, the resin layer 128 located inside the through hole 124 can cover the LED chip 118. This makes it possible to protect the surface of the LED chip 118, ensure insulation between the electrodes of the LED chip 118 (to be described later), and prevent the semiconductor surface from being exposed.

[0032] The resin layer 128 can be made of an ultraviolet curable resin, a thermosetting resin, a two-part mixed reactive resin, or the like. Also, a resin having a refractive index similar to that of the cover glass 102 and the circuit board 130 can be used. For example, a resin such as OCR (Optical Clear Resin) can be used. The resin layer 128 functions as an adhesive layer when the cover glass 102 and the circuit board 130 are bonded together. Therefore, the resin layer 128 can be used as an adhesive layer.

[0033] The LED chip 118R may include a semiconductor layer 118R-1. The semiconductor layer 118R-1 may be made of a semiconductor material made of a compound of a group III element such as aluminum, indium, or gallium and a group V element such as nitrogen, phosphorus, or arsenic. The material constituting the semiconductor layer 118R-1 may be selected according to the color of the emitted light.

[0034] In this embodiment, LED chip 118R emits red light, LED chip 118G emits green light, and LED chip 118B emits blue light.

[0035] The LED chip 118R may include a terminal electrode 118R-2. The terminal electrode 118R-2 functions as a terminal for electrically connecting the semiconductor layer 118R-1 and the connection electrode 120. In order to simplify the explanation, only one terminal electrode 118R-2 and one connection electrode 120 are shown in Fig. 2, but two terminal electrodes 118R-2 and two connection electrodes 120 may be provided for one semiconductor layer 118R-1, as in a flip-chip type LED.

[0036] The terminal electrode 118R-2 functions as a terminal for electrically connecting the semiconductor layer 118R-1 and the above-mentioned multiple connection electrodes 120. That is, the semiconductor layer 118R-1 can be electrically connected to the connection electrode 120 via the terminal electrode 118R-2. In this embodiment, an LED in which the LED chip is a flip-chip type has been exemplified, but in reality, two connection electrodes 120 are provided for one semiconductor layer 118R-1. In addition, since the LED chip having the above-mentioned configuration functions as an LED, the LED chip having the above-mentioned configuration can be called an LED.

[0037] The LED chip 118R can be electrically connected to a pixel circuit 140 provided on a circuit board 130 (described later) via the connection electrode 120. That is, the semiconductor layer 118R-1 and the terminal electrode 118R-2 can be electrically connected to the pixel circuit 140 via the connection electrode 120.

[0038] Description of the same structure of each of the LED chips 118R, 118G, and 118B will be omitted.

[0039] The circuit board 130 has an area corresponding to a plurality of pixels provided in the display area 108. As described above, the plurality of through holes 124 are arranged so as to fit the areas of the circuit board 130 corresponding to the plurality of pixels. As shown in FIG. 2, the circuit board 130 has pixel circuits 140 for driving, for example, LED chips 118 on the circuit board 130 in correspondence with each pixel. As the support board 101, for example, a glass substrate, a resin substrate, a ceramic substrate, or a metal substrate can be used. Each pixel circuit 140 is composed of a plurality of thin film transistors (TFTs). Each connection electrode 120 is arranged in each pixel and is connected to each pixel circuit 140.

[0040] In this embodiment, an example is shown in which the pixel circuits 140 and the connection electrodes 120 are formed on the support substrate 101 using a thin film formation technique, but the present invention is not limited to this example. For example, a substrate (a so-called active matrix substrate) on which the pixel circuits 140 are formed on the support substrate 101 may be obtained as a ready-made product from a third party. In this case, the connection electrodes 120 may be formed on the obtained substrate. In addition, in this embodiment, for example, a circuit substrate 130 on which a flip-chip type LED chip is mounted will be described. However, the LED chip 118R is not limited to an example of a flip-chip type having two electrodes on a surface facing the circuit substrate 130. For example, the LED chip 118R may have a structure having an anode electrode (or a cathode electrode) on the side closer to the circuit substrate 130 and a cathode electrode (or an anode electrode) on the side farther from the circuit substrate 130. That is, the LED chip 118R may be a face-up type LED chip having a structure in which a light-emitting layer is sandwiched between an anode electrode and a cathode electrode.

[0041] In this embodiment, an example in which 12 connection electrodes are arranged on the support substrate 101 is shown, but in this embodiment, a flip-chip type LED chip 118R is mounted, so in reality, at least two connection electrodes 120 are formed on the LED chip 118R of each pixel. The flip-chip type LED chip has a terminal electrode connected to an N-type semiconductor and a terminal electrode connected to a P-type semiconductor. Therefore, in this embodiment, one LED chip is arranged in each pixel, so at least two connection electrodes are arranged for each pixel. However, when the above-mentioned face-up type LED chip is used as the LED chip, it is sufficient that one connection electrode is formed on the support substrate for the LED chip of each pixel.

[0042] The connection electrode 120 is made of, for example, a metal material having electrical conductivity. In this embodiment, the metal material used is tin (Sn), nickel (Ni), copper (Cu), or a laminate of Sn / Ni / Cu. However, the present invention is not limited to this example, and other metal materials capable of forming a eutectic alloy with the terminal electrode on the LED chip side, which will be described later, can be used. The thickness of the connection electrode 120 may be determined within a range of 0.2 μm to 5 μm (preferably 1 μm to 3 μm).

[0043] In this embodiment, for the sake of simplicity, only one terminal electrode 118R-2 and one connection electrode 120 are shown, but in reality, two terminal electrodes 118R-2 and two connection electrodes 120 are provided for one semiconductor layer 118R-1. However, when the above-mentioned face-up type LED chip is used as the semiconductor layer 118R-1, a structure in which one connection electrode 120 is provided for each pixel may be used.

[0044] 3. Modification of resin layer 3-1. Variation 1 Here, a modified example of the structure of the resin layer will be described. FIG. 3 is a schematic end view of the display device according to the embodiment. In the display device 100, as shown in FIG. 3, the resin layer 128 located inside the through hole 124 can have a convex shape with respect to the second surface 138 of the cover glass 102. The light emitted from the LED chip 118R can be reduced in reflection on the outer surface of the resin layer 128 by passing through the part of the resin layer 128 having a convex shape. In addition, the light emitted from the LED chip 118R can be made into parallel light by passing through the part of the resin layer 128 having a convex shape. In other words, this shape can increase the light collection rate of the light emitted from the LED chip 118R and further improve the front brightness. Therefore, the resin layer 128 located inside the through hole 124 can have a microlens effect.

[0045] An upper end 128-1 of the resin layer 128 having a convex shape can be located below the first surface of the cover glass 102. This position of the upper end allows the light emitted by the LED chip 118R that is not collimated to be reflected by the reflective layer 126, thereby increasing the light collection rate of the light emitted by the LED chip 118R and further improving the front brightness.

[0046] The above-mentioned convex shape of the resin layer 128 can be formed in a process of bonding the cover glass 102 and the circuit board 130 together using the resin layer 128. That is, in the above-mentioned bonding process, the cover glass 102 is bonded onto the resin layer 128 applied to the circuit board 130, so that the resin layer 128 pressed against the circuit board 130 and the cover glass 102 and the resin layer 128 positioned between the circuit board 130 and the through hole 124 penetrate into the inside of the through hole 124, and the resin layer 128 that has penetrated therein can have a convex shape.

[0047] The convex shape of the resin layer 128 may be adjusted by the water repellency of the material of the reflective layer or by processing the reflective layer to form a water repellent layer.

[0048] 3-2. Variation 2 Further, modified examples of the structure of the resin layer will be described. FIG. 4 is a schematic end view of the display device according to the embodiment. In the display device 100, as shown in FIG. 4, the upper end 128-1 of the resin layer 128 having a convex shape can be located above the first surface 136 of the cover glass 102. In this way, by adjusting the position of the upper end 128-1 of the resin layer 128 having a convex shape, the focal distance from the light emitting point from the LED chip 118 or the light emitting surface to the resin layer 128 having a convex shape can be adjusted.

[0049] The resin layer 128 is provided on the inside of the first opening 132. As described above, the upper end 128-1 of the resin layer 128 having a convex shape is located above the first surface 136 of the cover glass 102, but by providing the resin layer 128 on the inside of the first opening 132, it is possible to prevent the resin layers provided on the insides of adjacent through holes from contacting each other.

[0050] 4. Modifications of through holes 4-1. Variation 1 Here, modified examples of the through-hole structure will be described. FIG. 5 is a schematic end view of the display device according to the embodiment. In the display device 100, as shown in FIG. 5, the through-hole 124 can have openings of different sizes. The through-hole 124 has a pair of a first opening 132 and a second opening 134. The first opening 132 can be provided on a first surface 136 of the cover glass 102. The second opening 134 can be provided on a second surface 138 of the cover glass 102. The width of the first opening 132 is narrower than the width of the second opening 134, as shown in FIG. 5.

[0051] 6 shows a top view of FIG. 5, which is a schematic end view of the display device 100. The schematic cross-sectional view taken along the dashed line B-B' in FIG. 5 corresponds to the cross-section taken along the dashed line B-B' in FIG.

[0052] As shown in Fig. 6, the through hole 124 shown in Fig. 5 can be provided with a first opening 132 and a second opening 134 of different sizes. As shown in Fig. 6, the first opening 132 can be provided inside the second opening 134.

[0053] Because first opening 132 has a circular shape, the width of first opening 132 represents the length of a line segment that passes through the center of first opening 132 and has both ends on the circumference of the opening. Similarly, the width of second opening 134 can be represented as the length of a line segment that passes through the center of second opening 134 and has both ends on the circumference of the opening. Therefore, even in a top view, the width of first opening 132 is narrower than the width of the second opening.

[0054] Next, FIG. 7 shows a schematic end view of a portion of the display device 100 including the through-hole 124 shown in FIGS.

[0055] As shown in FIG. 6, the first opening 132 of the through hole 124 is circular, and therefore has a center of the first opening 132, and as shown in FIG. 7, the first opening 132 is provided so as to pass through the center 132-1. The center 132-1 of the first opening 132 shown in FIG. 7 can refer to the center of the first opening 132 described above. As shown in FIG. 6, the second opening 134 of the through hole 124 is also circular, and therefore has a center of the second opening 134, and as shown in FIG. 7, the second opening 134 is also provided so as to pass through the center 134-1. The center 134-1 of the second opening 134 shown in FIG. 7 can refer to the center of the second opening 134 described above. Therefore, the width of the first opening 132 described above can be represented as a line segment 132-2 passing through the center 132-1 of the first opening 132. The width of the second opening 134 can also be represented as a line segment 134-2 passing through the center 134-1 of the second opening 134. 5. Moreover, the length of a line segment 132-2 passing through a center 132-1 of the first opening 132 in FIG. 7 corresponds to the width of the first opening in FIG.

[0056] Further, the through hole 124 may have a generating line 124-1. As shown in FIG. 7, a line connecting a point on the first opening 132 in an end view and a point on the second opening 134 in an end view may be the generating line 124-1. The generating line 124-1 shown in FIG. 7 corresponds to the generating line 124-1 shown in FIG. 5. As shown in FIG. 7, the through hole 124 has a first angle θ1134-3 formed by the generating line 124-1 and a line segment 134-2 passing through the center 134-1 of the second opening 134. The first angle θ1134-3 shown in FIG. 7 corresponds to the angle formed by the generating line 124-1 and the second opening 134 shown in FIG. 5. The first angle θ1134-3 may be, for example, in the range of 85 degrees or more and 90 degrees or less.

[0057] 4-2. Variation 2 Further, modified examples of the structure of the through hole will be described. FIG. 8 is a schematic end view of the display device according to the embodiment. In the display device 100, the through hole 124 shown in FIG. 8 has a different size relationship between the first opening 132 and the second opening 134 of the through hole 124 shown in FIG. 5. Specifically, as shown in FIG. 8, the width of the first opening 132 can be set wider than the width of the second opening 134. That is, the width relationship between the first opening 132 and the second opening 134 of the through hole 124 shown in FIG. 5 is reversed. Therefore, as shown in FIG. 8, the second angle θ2132-3 formed by the generatrix 124-1 of the through hole 124 and the first opening 132 can be set in the range of, for example, 85 degrees or more and 90 degrees or less.

[0058] Furthermore, although not shown, a second opening 134 is provided inside the first opening 132 in a top view.

[0059] The display device 100 has a plurality of LED chips 118R, LED chip 118G, and LED chip 118B, and a cover glass 102 having a plurality of through holes 124 is provided on a circuit board 130. The inner surfaces 124-2 of the plurality of through holes 124 are covered with a reflective layer 126, the plurality of LED chips 118 are disposed inside the plurality of through holes 124, and the plurality of LED chips 118 are surrounded by the reflective layer 126. With this configuration, of the light emitted from the plurality of LED chips 118, the diffused light is emitted to the outside of the display device 100 by the reflective layer 126.

[0060] Furthermore, in the display device 100, a resin layer 128 is provided between the circuit board 130 having the multiple LED chips 118 and the cover glass 102 having the multiple through holes 124. Moreover, the resin layer 128 is further provided inside the multiple through holes 124, and the resin layer 128 covers the multiple LED chips 118 provided inside the through holes 124. With this configuration, the resin layer 128 protects the multiple LED chips 118.

[0061] In addition, in the display device 100, the resin layer 128 provided inside the through-hole 124 has a convex shape. Diffused light among the light emitted from the multiple LED chips 118 is emitted to the outside of the display device 100, and the display device 100 has a simple configuration. Therefore, according to this embodiment, in the display device 100, the reflective layer 126 is provided inside the through-hole 124 of the cover glass 102, thereby improving the luminance of the display device 100, particularly the front luminance, and thus reducing power consumption.

[0062] Furthermore, since a convex resin layer is provided in the through hole 124 of the cover glass 102, there is no need to provide a separate condenser lens on the cover glass 102, which simplifies the manufacturing process of the display device 100 and reduces costs. Also, since no condenser lens is provided on the cover glass 102, the display device can be made thinner and lighter.

[0063] The above-described embodiments of the present invention may be combined as appropriate as long as they are not mutually inconsistent. Those in which a person skilled in the art appropriately adds or removes components or modifies designs, or adds or omits steps or modifies conditions, based on each embodiment, are also included in the scope of the present invention as long as they include the gist of the present invention.

[0064] Furthermore, even if there are other effects and advantages different from those brought about by the aspects of the above-mentioned embodiment, those which are clear from the description in this specification or which can be easily predicted by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0065] 100: display device, 101: supporting substrate, 102: cover glass, 104: flexible printed circuit board, 106: IC chip, 108: display area, 110: peripheral area, 112: terminal area, 114: opening, 118B: LED chip, 118B-1: semiconductor layer, 118B-2: terminal electrode, 118: LED chip, 118G: LED chip, 118R: LED chip, 118R-1: semiconductor layer, 120: connection electrode, 122: length of opening , 124: through hole, 124-1: bus bar, 124-2: inner surface, 126: reflective layer, 128: resin layer, 128-1: upper end, 130: circuit board, 132: first opening, 132-1: center of first opening, 132-2: line segment of first opening, 132-3: second angle θ2 of first opening, 134: second opening, 134-1: center of second opening, 134-2: line segment of second opening, 134-3: first angle θ1 of second opening, 136: first surface, 138: second surface, 140: pixel circuit

Claims

1. A cover glass having a plurality of through holes; A plurality of light emitting diodes; A substrate; a resin layer located inside the plurality of through holes and between the cover glass and the substrate; inner surfaces of the plurality of through holes are covered with a reflective layer; the plurality of light emitting diodes are disposed in the plurality of through holes in a plan view, the cover glass has a first surface and a second surface located opposite the first surface; the plurality of through holes includes a first through hole; the first through hole includes a first opening provided in the first surface and a second opening provided in the second surface; The resin layer on the inner side of the first through hole has a convex shape with respect to the second opening. Display device.

2. When viewed from an end surface taken along a plane passing through the centers of the first opening and the second opening, a width of the first opening is narrower than a width of the second opening. The display device according to claim 1 .

3. a first angle formed by the second opening and a generatrix of the first through hole in an end view cut along a plane passing through the centers of the first opening and the second opening is equal to or greater than 85 degrees and equal to or less than 90 degrees; The display device according to claim 2 .

4. In an end view cut along a plane passing through the centers of the first opening and the second opening, the width of the first opening is wider than the width of the second opening. The display device according to claim 1 .

5. a second angle formed by the first opening and a generatrix of the first through hole in an end view taken along a plane passing through the centers of the first opening and the second opening is equal to or greater than 85 degrees and equal to or less than 90 degrees; The display device according to claim 4.

6. an upper end of the convex shape is located below the first surface in an end view passing through centers of the first opening and the second opening; The display device according to claim 1 .

7. an upper end of the convex shape is located above the first surface in an end view passing through centers of the first opening and the second opening; The display device according to claim 1 .

Images