Transparent display and its light-emitting structure

Abstract

The present invention provides a "transmissive display and its light-emitting structure" that can suppress the reduction in brightness on the observation surface caused by light irradiated towards the back of the display through the gap between electrodes when the light source is turned on. [Solution] In a light-emitting structure 10 for a transmissive display, which comprises multiple sets of electrodes 3 and 4 arranged in an array and multiple translucent LEDs 8 arranged to span between each set of electrodes 3 and 4, a reflective portion 9 is provided in a target region including a region that shields the optical path on the optical path from the portion of the back surface of the LED 8 facing the gap between electrodes 3 and 4 toward the transparent substrate 1 when the LED 8 is lit, so that the light irradiated from the back surface of the LED 8 toward the transparent substrate 1 is reflected by the reflective portion 9 and becomes light toward the observation surface, thereby preventing a decrease in brightness toward the observation surface.

Description

[Technical Field]

[0001] This disclosure relates to a transparent display and its light-emitting structure. [Background technology]

[0002] Unlike conventional displays, transmissive displays are known that allow the background to be seen through. Transmissive displays arrange multiple light sources in an array on a transparent substrate and provide multiple openings where electrodes or other components are not placed, allowing light to pass through the back of the display to the front. The ratio of the area of ​​the opening to the area of ​​a single pixel is called the aperture ratio, and the larger the aperture ratio, the more background light can be taken in, resulting in a display that appears nearly transparent.

[0003] There are various types of transmissive displays, but transmissive LED displays, in particular, are expected to have applications in a wide range of fields because they can achieve a high transmittance of 70% or more. When constructing a transmissive LED display, it is preferable to use a technology called microLED, which involves miniaturizing the LEDs used as light sources and arranging them in an array.

[0004] Figure 8 is a simplified diagram showing the structure of the light-emitting part of a transmissive LED display. Figure 8(a) shows the light-emitting part of the transmissive LED display as viewed from the front side, and Figure 8(b) shows the light-emitting part of the transmissive LED display as viewed from the back side. As shown in Figure 8(a), a plurality of LEDs 101 are arranged in an array, and a plurality of openings 102 are arranged in an array adjacent to the plurality of LEDs 101. Each of the plurality of LEDs 101 is positioned between the anode electrode 103 and the cathode electrode 104.

[0005] In a transmissive LED display configured in this way, as shown in Figure 8(b), the light emitted by the LED 101 to project information onto the surface leaks to the back surface through the gap between the anode electrode 103 and the cathode electrode 104. However, the light emitted from the LED 101 toward the back surface, which is different from the observation surface on the front side, is emitted directly onto the back of the transmissive LED display, resulting in wasted light that does not contribute to the brightness on the observer's side.

[0006] In other words, micro-LED elements are generally manufactured by growing a semiconductor thin film on a sapphire substrate using epitaxial growth. Because sapphire and semiconductor thin films have high transparency, light emitted from inside the element is radiated in all directions. Furthermore, in transmissive LED displays, both the substrate placed on the front side and the substrate placed on the back side of LED 101 are made of transparent substrates. Therefore, when LED 101 is lit, light that passes through the gap between electrodes 102 and 103 from the back of LED 101 further passes through the transparent substrate and leaks to the back of the display. As a result, there was a problem in that the light utilization efficiency decreased due to the light leaking to the back side, and the brightness on the observation surface decreased.

[0007] Furthermore, a technique is known in which the wiring pattern of a circuit board on which an LED chip is mounted is constructed from a light-reflective material (for example, aluminum), thereby enabling the light emitted from the back side of the LED chip to be extracted to the front side (see, for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2012-204370 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] This disclosure is made to solve the above-mentioned problems and aims to prevent a decrease in brightness on the observation surface in a transmissive display caused by light irradiated towards the back surface of the display through the gap between electrodes when the light source is turned on. [Means for solving the problem]

[0010] To solve the above-mentioned problems, the light-emitting structure of the transparent display according to this disclosure comprises a plurality of electrodes arranged in an array, a plurality of light-transmitting light sources arranged to span between each set of electrodes, and a reflective portion arranged in a target region including a region that shields the optical path on the optical path from the portion of the back surface of the light source facing the gap between electrodes toward the transparent substrate. [Effects of the Invention]

[0011] According to the present disclosure configured as described above, in a transmissive display, when the light source is turned on, the light irradiated from the back of the light source toward the transparent substrate is reflected by the reflective part and becomes light directed toward the observation surface. Therefore, it is possible to suppress the decrease in brightness toward the observation surface caused by light irradiated toward the back of the display through the gap between electrodes. [Brief explanation of the drawing]

[0012] [Figure 1] This figure shows an example of the configuration of the light-emitting structure of a transmissive LED display according to the first embodiment. [Figure 2] This figure illustrates the effect of the light-emitting structure according to the first embodiment. [Figure 3] This figure shows an example of the configuration of the light-emitting structure of a transmissive LED display according to the second embodiment. [Figure 4] This figure shows an example of the configuration of the light-emitting structure of a transmissive LED display according to the third embodiment. [Figure 5] This figure shows an example of the configuration of the light-emitting structure of a transmissive LED display according to the fourth embodiment. [Figure 6]It is a diagram showing a configuration example of a light emission structure of a transmissive LED display according to the fifth embodiment. [Figure 7] It is a diagram showing a configuration example of a light emission structure of a transmissive LED display according to other embodiments. [Figure 8] It is a diagram showing the structure of a light emitting portion of a transmissive LED display.

Embodiments for Carrying Out the Invention

[0013] Hereinafter, each embodiment of the present disclosure will be described based on the drawings. The display to which each of the embodiments to be sequentially described below is applied is a transmissive display configured such that a plurality of light sources are arranged between a plurality of sets of electrodes arranged in an array on a transparent substrate, and a plurality of openings where no electrodes are arranged are provided so that light can be transmitted through the plurality of openings. In each embodiment, a light emission structure for suppressing a decrease in luminance with respect to the observation surface is applied to a transmissive LED display using a micro LED element having translucency as an example of a light source.

[0014] (First Embodiment) FIG. 1 is a diagram showing a configuration example of a light emission structure 10A of a transmissive LED display according to the first embodiment. FIG. 1(a) shows a cross-sectional configuration of one light emission structure 10A when the transmissive LED display is viewed from the side, where the upper part of the figure is the front surface of the display and the lower part of the figure is the back surface of the display. FIG. 1(b) shows the array arrangement of the light emission structure 10A when the transmissive LED display is viewed from the front surface, where the vertical direction of the figure is the first direction and the horizontal direction of the figure is the second direction (the first direction and the second direction will be described later). In FIG. 1(b), four juxtaposed light emission structures 10A are shown, but in actuality, more light emission structures 10A are arranged in an array.

[0015] As shown in Figure 1(a), one light-emitting structure 10A has an insulating layer 2 formed on a transparent substrate 1, and a pair of anode electrodes 3 and cathode electrodes 4 are arranged on the surface of the insulating layer 2 at a predetermined distance apart. An LED 8 is then positioned and electrically connected so as to straddle the electrodes 3 and 4. In the example in Figure 1(a), an electrode pad 6 is placed on the electrodes 3 and 4, and the LED 8 is mounted by a conductive adhesive applied to the electrode pad 6.

[0016] Furthermore, wiring electrodes 5 are formed on the surface of the transparent substrate 1, and the cathode electrode 4 and the wiring electrodes 5 are electrically connected by contact holes 7. The cathode electrode 4 is the upper electrode and the wiring electrodes 5 are the lower electrode, separated by the insulating layer 2. As shown in Figure 1(b), the wiring electrodes 5 are connected to a plurality of common wiring electrodes 11 that extend in the second direction. A plurality of segment wiring electrodes 12 extend in the first direction, which is perpendicular to the second direction, and the anode electrodes 3 are connected to the segment wiring electrodes 12. The common wiring electrodes 11 and the segment wiring electrodes 12 intersect in three dimensions, separated by the insulating layer 2.

[0017] As shown in Figure 1(b), the transmissive LED display has a matrix configuration in which multiple sets of electrodes 3 and 4 are arranged in an array on a laminated structure of a transparent substrate 1 and an insulating layer 2, on which multiple common wiring electrodes 11 extending in a second direction and multiple segment wiring electrodes 12 extending in a first direction are provided, and multiple LEDs 8 are arranged across each set of electrodes 3 and 4. For the sake of explanation, the insulating layer 2, electrode pads 6 and contact holes 7 are omitted from the illustration in Figure 1(b).

[0018] In Figure 1(b), the portion where none of the light-emitting structure 10A, common wiring electrode 11, or segment wiring electrode 12 described above are provided is an opening 20. This opening 20 allows light to pass through from the back to the front of the transmissive LED display, making the back of the transmissive LED display visible from the front.

[0019] As shown in Figure 1, the light-emitting structure 10A according to the first embodiment includes a reflective portion 9A in a target region that includes a region that shields the optical path, on the optical path from the portion of the back surface of the LED 8 facing the gap between electrodes 3 and 4 toward the transparent substrate 1. This reflective portion 9A is a reflective layer made of a metal film formed in the gap between each set of electrodes 3 and 4 on the same layer (surface of the insulating layer 2) as the layer on which multiple sets of electrodes 3 and 4 are formed. The metal film can be any type of metal, such as Al, Ni, Ag, or AgMg, but it is preferable to use one with high reflectivity and little color change of reflected light.

[0020] As shown in Figure 1(b), the target region where the reflective portion 9A of the metal film is formed is a rectangular region having edges in a first direction, which is the direction connecting electrodes 3 and 4, and in a second direction, which is perpendicular to the first direction. The length of the target region in the first direction is less than or equal to the longer of the maximum length between the edges of the pair of electrodes 3 and 4 in the first direction or the length of the LED 8 in the first direction, and the length in the second direction is less than or equal to the longer of the length of the pair of electrodes 3 and 4 in the second direction or the length of the LED 8 in the second direction.

[0021] The reason for specifying the target area to this size is to prevent the reflective portion 9 from extending beyond the area of ​​the opening 20 (the same applies to the second, third, and fifth embodiments described later). It is not essential that the target area be rectangular, nor is it essential to specify its size as described above, but it is preferable to specify it as described above from the viewpoint of preventing a decrease in the aperture ratio.

[0022] In the first embodiment, since the metal film reflective portion 9A is placed in the gap between electrodes 3 and 4 in the same layer in which electrodes 3 and 4 are formed, the reflective portion 9A must be in a non-contact state with electrodes 3 and 4 in order to prevent short circuits. Therefore, the length of the target region where the reflective portion 9A is formed in the first direction must be shorter than the length of the gap formed between electrodes 3 and 4 in the first direction, and it must be positioned so as not to contact or overlap with electrode 3 or electrode 4. In order to minimize the gap region in which the reflective portion 9A is not formed in the first direction, it is preferable that the length of the target region in the first direction be slightly shorter than the length of the gap between electrodes 3 and 4 in the first direction. On the other hand, the length of the target region where the reflective portion 9A is formed in the second direction is less than or equal to the length of the LED 8 in the second direction. In order to minimize the gap region in which the reflective portion 9A is not formed in the second direction, it is preferable that the length of the target region in the second direction be equal to or slightly shorter than the length of the LED 8 in the second direction. By forming the reflective portion 9A in this manner, it is possible to prevent short circuits with electrodes 3 and 4 while blocking almost the entire gap between electrodes 3 and 4 with the reflective portion 9A.

[0023] Figure 2 schematically illustrates the effect of the light-emitting structure 10A according to this embodiment, as described above, in comparison with a conventional light-emitting structure. Figure 2(a) shows a conventional light-emitting structure, and Figure 2(b) shows the light-emitting structure 10A of this embodiment. LED8 is a micro-LED element and is composed of highly transparent sapphire and a semiconductor thin film. Therefore, as shown in Figures 2(a) and (b), when LED8 is lit, the emitted light is radiated in all directions, and light is irradiated not only from the front surface of LED8 but also from the back surface.

[0024] In the conventional light-emitting structure shown in Figure 2(a), light irradiated from the back of the LED 8 toward the transparent substrate 1 leaks through the gap between electrodes 3 and 4 to the back of the transparent substrate 1. In contrast, in the light-emitting structure 10A of this embodiment shown in Figure 2(b), light irradiated from the back of the LED 8 toward the transparent substrate 1 is reflected by the reflector 9A, which is positioned to block the gap between electrodes 3 and 4, and becomes light that passes through the LED 8 toward the observation surface of the transmissive LED display. Therefore, it is possible to suppress the decrease in brightness toward the observation surface caused by light irradiated from the back of the LED 8 toward the back of the transparent substrate 1 through the gap between electrodes 3 and 4. This makes it possible to increase the light utilization efficiency of the LED 8 and increase the brightness of the observation surface.

[0025] (Second embodiment) Figure 3 shows an example of the configuration of the light-emitting structure 10B of a transmissive LED display according to the second embodiment. Figure 3(a) shows the cross-sectional configuration of one light-emitting structure 10B when viewed from the side of the transmissive LED display, with the top of the figure being the front surface of the display and the bottom of the figure being the back surface of the display. Figure 3(b) shows the array arrangement of the light-emitting structures 10B when viewed from the front of the transmissive LED display, with the vertical direction of the figure being the first direction and the horizontal direction being the second direction. In Figure 3, components having the same function as those shown in Figure 1 are denoted by the same reference numerals.

[0026] As shown in Figure 3(a), one light-emitting structure 10B has a first insulating layer 2 on top of the transparent substrate 1. -1 and second insulating layer 2 -2 A first insulating layer 2 is formed. -1 Wiring electrodes 5 are arranged on the surface, and the second insulating layer 2 -2 A pair of anode electrodes 3 and cathode electrodes 4 are arranged on the surface at a predetermined distance apart, and an LED 8 is positioned and electrically connected so as to straddle the space between electrodes 3 and 4. Second insulating layer 2 -2 With the cathode electrode 4 as the upper electrode and the wiring electrode 5 as the lower electrode, the two electrodes are in a hierarchical relationship.

[0027] As shown in Fig. 3(b), a transparent substrate 1 and an insulating layer 2 are provided with a plurality of common wiring electrodes 11 extending in the second direction and a plurality of segment wiring electrodes 12 extending in the first direction. -1 ,2 -2 For the laminated structure of, a plurality of sets of electrodes 3, 4 are arranged in an array, and a plurality of LEDs 8 are arranged so as to straddle between each set of the electrodes 3, 4. In Fig. 3(b), for the sake of explanation, the insulating layer 2 -1 ,2 -2 , the electrode pads 6 and the contact holes 7 are not shown.

[0028] As shown in Fig. 3(a), the light-emitting structure 10B according to the second embodiment includes a reflection part 9B in a target area including an area that shields the optical path in the direction from the portion of the back surface of the LED 8 facing the gap between the electrodes 3, 4 toward the transparent substrate 1 on the optical path. This reflection part 9B is a reflection layer made of a metal film formed on a layer (the surface of the second insulating layer 2 -2 ) different from the layer (the surface of the transparent substrate 1) on which the plurality of sets of electrodes 3, 4 are formed.

[0029] As shown in Fig. 3(b), the target area where the reflection part 9B of the metal film is formed is also a rectangular area, and the length of the target area in the first direction is not more than the longer one of the maximum length between the edges of the pair of electrodes 3, 4 in the first direction or the length of the LED 8 in the first direction, and the length in the second direction is not more than the longer one of the length of the pair of electrodes 3, 4 in the second direction or the length of the LED 8 in the second direction.

[0030] In the second embodiment, since the metal film reflective portion 9B is placed in a layer different from the layer on which electrodes 3 and 4 are formed, it is not necessary to consider preventing short circuits between the reflective portion 9B and electrodes 3 and 4, and it is possible to make it larger than the reflective portion 9 in the first embodiment. In the example shown in Figure 3, the length of the target region on which the reflective portion 9B is formed in the first direction is longer than the length of the gap formed between electrodes 3 and 4 in the first direction, and shorter than the length of the LED 8 in the first direction. Alternatively, it may be longer than the length of the LED 8 in the first direction, and shorter than the maximum length between the edges of the pair of electrodes 3 and 4 in the first direction. On the other hand, the length of the target region on which the reflective portion 9B is formed in the second direction may be the same as the length of the reflective portion 9 shown in the first embodiment.

[0031] For example, the length of the target region in the first direction may be set to be greater than or equal to the length of the gap between electrodes 3 and 4 in the first direction, and less than or equal to the longer of the maximum length between the edges of the pair of electrodes 3 and 4 in the first direction or the length of the LED 8 in the first direction, while the length of the target region in the second direction may be set to be greater than or equal to the length of the gap between electrodes 3 and 4 in the second direction, and less than or equal to the longer of the length of the pair of electrodes 3 and 4 in the second direction or the length of the LED 8 in the second direction. By forming a reflective portion 9B in such a target region, light leaking from between electrodes 3 and 4 can be reflected over a wider area, further increasing the light utilization efficiency of the LED 8.

[0032] (Third embodiment) Figure 4 shows an example of the configuration of the light-emitting structure 10C of a transmissive LED display according to the third embodiment. Figure 4(a) shows the cross-sectional configuration of one light-emitting structure 10C when the transmissive LED display is viewed from the side, with the top of the figure being the front surface of the display and the bottom of the figure being the back surface of the display. Figure 4(b) shows the array arrangement of the light-emitting structures 10C when the transmissive LED display is viewed from the front, with the vertical direction of the figure being the first direction and the horizontal direction being the second direction. In Figure 4, components having the same function as those shown in Figure 3 are denoted by the same reference numerals.

[0033] The light-emitting structure 10C according to the third embodiment is the same as that of the second embodiment except for the reflective portion 9C. The reflective portion 9C according to the third embodiment is a layer (second insulating layer 2) on which multiple sets of electrodes 3 and 4 are formed. -2 The reflective layer is made of a metal plate, metal film, or metal sheet and is formed on a different layer (the back surface of the transparent substrate 1) from the surface of the transparent substrate 1. The reflective portion 9C is attached to the back surface of the transparent substrate 1, for example, via an adhesive.

[0034] In the example shown in Figure 4, the length of the target region where the reflective portion 9C is formed in the first direction is longer than the length of the LED 8 in the first direction, and shorter than the maximum length between the edges of the pair of electrodes 3 and 4 in the first direction. In other words, it is longer than the reflective portion 9B shown in the second embodiment, but this is just one example. The length in the first direction may be the same as the length of the reflective portion 9B shown in the second embodiment. On the other hand, the length of the target region where the reflective portion 9C is formed in the second direction may be the same as the length of the reflective portion 9B shown in the second embodiment. By forming the reflective portion 9C in this way, light leaking from between the electrodes 3 and 4 can be reflected over a wider area.

[0035] When the reflective portion 9C is placed on the back surface of the transparent substrate 1, the distance between the LED 8 and the reflective portion 9C becomes longer compared to the second embodiment, but it is possible to keep the distance to about 1 mm or less. At this distance, there is no effect that would cause blurring of the image due to reflected light, and there are no practical problems. Note that the first insulating layer 2 -1 By omitting this step, the insulating layer 2 may be made into a single layer, as in Figure 1. This would allow the distance between the LED 8 and the reflector 9C to be shortened.

[0036] (Fourth embodiment) Figure 5 shows an example of the configuration of the light-emitting structure 10D of a transmissive LED display according to the fourth embodiment. Figure 5(a) shows the cross-sectional configuration of one light-emitting structure 10D when viewed from the side of the transmissive LED display, with the top of the figure being the front surface of the display and the bottom of the figure being the back surface of the display. Figure 5(b) shows the array arrangement of the light-emitting structures 10D when viewed from the front of the transmissive LED display, with the vertical direction of the figure being the first direction and the horizontal direction being the second direction. In Figure 5, components having the same function as those shown in Figure 1 are denoted by the same reference numerals.

[0037] In the fourth embodiment, a plurality of common wiring electrodes 11D extending in the second direction are placed directly beneath the LED 8, and the common wiring electrodes 11D are used as a reflector. That is, in the fourth embodiment, the reflector is a common wiring electrode 11D formed on the surface of the transparent substrate 1, separate from the plurality of electrodes 3,4 formed on the surface of the insulating layer 2, and does not include the reflector 9A shown in Figure 1.

[0038] As shown in Figure 5, the region where the common wiring electrode 11D is formed is also a rectangular region, and its length in the first direction is longer than the length of the gap between electrodes 3 and 4 in the first direction. The common wiring electrode 11D extends continuously in the second direction, straddling each light-emitting structure 10D, and its length in the second direction is longer than the length of the gap between electrodes 3 and 4 in the second direction. By using a common wiring electrode 11D of this shape as a reflector, light leaking from between electrodes 3 and 4 can be reflected over a wider area. Furthermore, it is possible to omit providing a separate reflector from the common wiring electrode 11D.

[0039] (Fifth embodiment) Figure 6 shows an example of the configuration of the light-emitting structure 10E of a transmissive LED display according to the fifth embodiment. Figure 6 shows two patterns of cross-sectional configuration of one light-emitting structure 10E when viewed from the side of the transmissive LED display, with the upper part of the figure being the front surface of the display and the lower part being the back surface of the display. The array arrangement of the light-emitting structure 10E when viewed from the front surface of the transmissive LED display is the same as in Figure 3(b). In Figure 6, components having the same function as those shown in Figure 3 are denoted by the same reference numerals.

[0040] In the fifth embodiment, a light-shielding layer 13 is further provided, which is formed at a layer position further away from the reflective portion 9B of the metal film as viewed from the LED 8. The light-shielding layer 13 is formed in a shape and size that covers the back surface of the reflective portion 9B. The planar shape of the light-shielding layer 13 may be the same shape and size as that of the reflective portion 9, or it may be larger in size than the reflective portion 9B. In Figure 6(a), the light-shielding layer 13 can be, for example, a blackened mask material or a metal film. Also, in Figure 6(b), the light-shielding layer 13 can be, for example, a light-shielding plate, a light-shielding film, or a light-shielding sheet.

[0041] Although there is a concern that specularly reflected light may hit a person behind the display due to the presence of a reflective portion 9B on the surface of the transparent substrate 1, this can be prevented by providing a light-shielding layer 13 on the back side of the reflective portion 9B.

[0042] In Figure 6, a configuration is shown in which a light-shielding layer 13 is further added to the light-emitting structure 10B shown in Figure 3 in the second embodiment. However, a configuration in which a light-shielding layer 13 is further added to the light-emitting structure 10 shown in Figure 1 in the first embodiment or the light-emitting structure 10C shown in Figure 4 in the third embodiment may also be used.

[0043] (Other embodiments) The first to fifth embodiments described above are merely examples of how the present disclosure may be implemented, and the technical scope of the present disclosure should not be interpreted as being limited by them. In other words, the light-emitting structure of the present disclosure only needs to have a configuration in which a reflective portion is provided in a target region including a region that shields the optical path, on the optical path from the portion of the back surface of a translucent light source facing the gap between electrodes toward a transparent substrate, and the present disclosure can be implemented in various forms without departing from its gist or its main features.

[0044] For example, in the above embodiment, a configuration was described in which reflective portions 9A to 9C are provided at the same layer position as electrodes 3 and 4 or at a layer position further away from the LED 8. However, the reflective portions may be provided at a layer position closer to electrodes 3 and 4. For example, as shown in the light-emitting structure 10F in Figure 7(a), a configuration in which a reflective portion 9F (for example, a reflective layer made of a metal plate, metal film, or metal sheet) is placed on the back surface of the LED 8 may be used. Alternatively, as shown in the light-emitting structure 10G in Figure 7(b), a second insulating layer 2 is provided between electrodes 3 and 4 and electrode pad 6. -2 and third insulating layer 2 -3 Forms the insulating layer 2 -2 ,2 -3 The second contact hole 7 provided there -2 The electrodes 3 and 4 and the electrode pad 6 are connected via the second insulating layer 2, which is closer to the electrodes 3 and 4 as seen from the LED 8. -2 The surface may be provided with a reflective portion 9G (for example, a reflective layer made of a metal film).

[0045] Examples of configurations that may be applied to the light-emitting structure of the transparent display described herein are summarized below.

[0046] [Configuration 1] Multiple sets of electrodes arranged in an array, Multiple light-transmitting light sources are arranged to span across the spaces between each set of electrodes, The above light source comprises a reflective portion positioned in a target region including an area that shields the optical path, on the optical path from the portion of the back surface facing the gap between the electrodes toward the transparent substrate. A light-emitting structure for a transmissive display, characterized by the following features.

[0047] [Configuration 2] Having a laminated structure including the above-mentioned transparent substrate and insulating layer, The light-emitting structure of a transmissive display according to configuration 1, characterized in that the reflective portion is formed in the gaps between each set of electrodes in the same layer on which the plurality of sets of electrodes are formed.

[0048] [Configuration 3] Having a laminated structure including the above-mentioned transparent substrate and insulating layer, The reflective portion is formed in a layer different from the layer on which the multiple sets of electrodes are formed. A light-emitting structure for a transmissive display according to configuration 1, characterized in that it is a transmissive display.

[0049] [Structure 4] The light-emitting structure of a transmissive display according to configuration 3, characterized in that the reflective portion is a wiring electrode separate from the multiple sets of electrodes described above.

[0050] [Composition 5] The target region where the above-mentioned wiring electrodes are formed is a rectangular region having edges in a first direction which connects the electrodes and in a second direction which is perpendicular to the first direction. The light-emitting structure for a transmissive display according to configuration 4, characterized in that the length in the first direction is longer than the length of the gap between the electrodes in the first direction, and the length in the second direction is longer than the length of the gap between the electrodes in the second direction.

[0051] [Composition 6] The light-emitting structure for a transmissive display according to configuration 2 or 3, characterized in that the reflective portion is a reflective layer formed of a metal film, plate, film, or sheet.

[0052] [Composition 7] The target region where the reflective layer is formed is a rectangular region having edges in a first direction which connects the electrodes and in a second direction which is perpendicular to the first direction. The length of the target region in the first direction is less than or equal to the longer of the maximum length between the edges of the pair of electrodes in the first direction or the length of the light source in the first direction. The length of the target region in the second direction is less than or equal to the longer of the length of the pair of electrodes in the second direction or the length of the light source in the second direction. A light-emitting structure for a transmissive display according to configuration 6, characterized in that it is a transmissive display.

[0053] [Structure 8] The reflective portion is a reflective layer formed from a metal film, plate, film, or sheet. The target region where the reflective layer is formed is a rectangular region having edges in a first direction which connects the electrodes and in a second direction which is perpendicular to the first direction. The length of the target region in the first direction is greater than or equal to the length of the gap between the electrodes in the first direction, and less than or equal to the longer of the maximum length between the edges of the pair of electrodes in the first direction or the length of the light source in the first direction. The length of the target region in the second direction is greater than or equal to the length of the gap between the electrodes in the second direction, and less than or equal to the longer of the length of the pair of electrodes in the second direction or the length of the light source in the second direction. A light-emitting structure for a transmissive display according to configuration 3, characterized in that it is a transmissive display.

[0054] [Composition 9] The light-emitting structure for a transmissive display according to any one of the configurations 6 to 8, characterized in that the reflective portion is a metal film formed on the surface of the transparent substrate or the insulating layer.

[0055] [Configuration 10] The light-emitting structure for a transmissive display according to any one of the configurations 6 to 8, characterized in that the reflective portion is a metal plate, metal film, or metal sheet formed on the back surface of the transparent substrate.

[0056] [Composition 11] A light-emitting structure for a transmissive display according to any one of configurations 6 to 10, further comprising a light-shielding layer formed at a layer position further away from the light source than the reflective layer.

[0057] [Composition 12] A transmissive display having a light-emitting structure as described in any one of items 1 to 11. [Explanation of Symbols]

[0058] 1…Transparent substrate, 2…Insulating layer, 3…Anode electrode, 4…Cathode electrode, 5…Wiring electrode, 6…Electrode pad, 7…Contact hole, 8…LED (light source), 9A~9C,9F,9G…Reflective part (reflective layer), 10A~10G…Light-emitting structure, 11…Common wiring electrode, 11D…Common wiring electrode (reflective part), 12…Segment wiring electrode, 13…Light-shielding layer, 20…Opening

Claims

1. Multiple sets of electrodes arranged in an array, Multiple light-transmitting light sources are arranged to span across the spaces between each set of electrodes, The above light source comprises a reflective portion positioned in a target region including an area that shields the optical path, on the optical path from the portion of the back surface facing the gap between the electrodes toward the transparent substrate. A light-emitting structure for a transmissive display characterized by the following features.

2. Having a laminated structure including the above-mentioned transparent substrate and insulating layer, The light-emitting structure for a transmissive display according to claim 1, characterized in that the reflective portion is formed in the gaps between each set of electrodes in the same layer on which the plurality of sets of electrodes are formed.

3. Having a laminated structure including the above-mentioned transparent substrate and insulating layer, The reflective portion is formed in a layer different from the layer on which the multiple sets of electrodes are formed. The light-emitting structure for a transmissive display according to feature 1.

4. The light-emitting structure for a transmissive display according to claim 3, characterized in that the reflective portion is a wiring electrode separate from the multiple sets of electrodes.

5. The target region where the above-mentioned wiring electrodes are formed is a rectangular region having edges in a first direction which connects the electrodes and in a second direction which is perpendicular to the first direction. The light-emitting structure for a transmissive display according to claim 4, characterized in that the length in the first direction is longer than the length of the gap between the electrodes in the first direction, and the length in the second direction is longer than the length of the gap between the electrodes in the second direction.

6. The light-emitting structure for a transmissive display according to claim 2 or 3, characterized in that the reflective portion is a reflective layer formed of a metal film, plate, film, or sheet.

7. The target region where the reflective layer is formed is a rectangular region having edges in a first direction which connects the electrodes and in a second direction which is perpendicular to the first direction. The length of the target region in the first direction is less than or equal to the longer of the maximum length between the edges of the pair of electrodes in the first direction or the length of the light source in the first direction. The length of the target region in the second direction is less than or equal to the longer of the length of the pair of electrodes in the second direction or the length of the light source in the second direction. The light-emitting structure for a transmissive display according to feature 6.

8. The reflective portion is a reflective layer formed from a metal film, plate, film, or sheet. The target region where the reflective layer is formed is a rectangular region having edges in a first direction which connects the electrodes and in a second direction which is perpendicular to the first direction. The length of the target region in the first direction is greater than or equal to the length of the gap between the electrodes in the first direction, and less than or equal to the longer of the maximum length between the edges of the pair of electrodes in the first direction or the length of the light source in the first direction. The length of the target region in the second direction is greater than or equal to the length of the gap between the electrodes in the second direction, and less than or equal to the longer of the length of the pair of electrodes in the second direction or the length of the light source in the second direction. The light-emitting structure for a transmissive display according to feature 3.

9. The light-emitting structure for a transmissive display according to claim 6, characterized in that the reflective portion is a metal film formed on the surface of the transparent substrate or the insulating layer.

10. The light-emitting structure for a transmissive display according to claim 6, characterized in that the reflective portion is a metal plate, metal film, or metal sheet formed on the back surface of the transparent substrate.

11. The light-emitting structure of a transmissive display according to claim 6, further comprising a light-shielding layer formed at a layer position further away from the light source than the reflective layer.

12. A transmissive display having the light-emitting structure described in claim 1.

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