Display module, manufacturing method, and display device

Abstract

The present technology relates to a display module, a manufacturing method, and a display device capable of improving display quality. The display module has a display unit and a film disposed on the display unit to reduce light incident from the outside and reflected by the display unit, wherein: the display unit has an electronic substrate and a plurality of LED elements arranged side by side at predetermined intervals on a film side surface of the electronic substrate; and a distance from the LED element closest to an end of the display unit to the end of the display unit is half or less than that of the predetermined intervals. The present technology can be applied to LED tiling displays.

Description

[Technical Field]

[0001] The present technology relates to a display module, a manufacturing method thereof, and a display device, and more particularly to a display module, a manufacturing method thereof, and a display device that are capable of improving display quality. [Background technology]

[0002] Conventionally, LED tiling displays are known, which are configured by arranging multiple panel-shaped display modules, each of which has multiple LED (Light Emitting Diode) elements aligned and mounted on an electronic substrate. For example, in an LED tiling display, a large display can be realized by arranging multiple display modules.

[0003] Furthermore, as a display-related technology, an organic light-emitting diode display device has been proposed in which an anti-reflection film is provided on the surface of the display area to suppress reflection of external light (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-65523 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the above-mentioned LED tiling display, it has been difficult to suppress reflection of external light and display images with sufficiently high display quality.

[0006] The present technology has been made in view of such circumstances, and is intended to make it possible to improve display quality. [Means for solving the problem]

[0007] A display module according to a first aspect of the present technology comprises a display unit and a film disposed on the display unit for reducing light incident from the outside and reflected by the display unit, the display unit comprising an electronic board and a plurality of LED elements arranged at a predetermined interval on the surface of the electronic board facing the film, and the distance from the LED element closest to the edge of the display unit to the edge of the display unit is equal to or less than half the predetermined interval.

[0008] In a first aspect of the present technology, a display module includes a display unit and a film disposed on the display unit for reducing light incident from outside and reflected by the display unit, the display unit includes an electronic substrate and a plurality of LED elements disposed at predetermined intervals on a surface of the electronic substrate facing the film, and the distance from the LED element closest to an edge of the display unit to the edge of the display unit is equal to or less than half the predetermined interval.

[0009] A display device according to a second aspect of the present technology is a display device having a plurality of display modules arranged in a tiled pattern, wherein the display module has a display unit and a film arranged on the display unit for reducing light incident from the outside and reflected by the display unit, and the display unit has an electronic board and a plurality of LED elements arranged at a predetermined interval on the surface of the electronic board facing the film, and the distance from the LED element closest to the edge of the display unit to the edge of the display unit is equal to or less than half the distance of the predetermined interval.

[0010] In a second aspect of the present technology, in a display device having a plurality of display modules arranged in a tiled pattern, the display modules are provided with a display unit and a film arranged on the display unit for reducing light incident from outside and reflected by the display unit, the display unit is provided with an electronic substrate and a plurality of LED elements arranged at predetermined intervals on a surface of the electronic substrate facing the film, and the distance from the LED element closest to an edge of the display unit to the edge of the display unit is equal to or less than half the distance of the predetermined interval.

[0011] A manufacturing method according to a third aspect of the present technology is a manufacturing method for a display module having a display unit and a film for reducing light that is incident from outside and reflected by the display unit, and includes a step of forming the display unit having the electronic substrate and the plurality of LED elements by arranging a plurality of LED elements at a predetermined interval on an electronic substrate, so that the distance from the LED element closest to the edge of the display unit to the edge of the display unit is equal to or less than half the predetermined interval, and placing the film on the surface of the display unit on the side where the LED elements are arranged.

[0012] In a third aspect of the present technology, when manufacturing a display module having a display unit and a film for reducing light that is incident from outside and reflected by the display unit, a plurality of LED elements are arranged on an electronic substrate at a predetermined interval, thereby forming a display unit having the electronic substrate and the plurality of LED elements, such that the distance from the LED element closest to the edge of the display unit to the edge of the display unit is equal to or less than half the predetermined interval, and the film is placed on the surface of the display unit on which the LED elements are arranged. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a diagram illustrating the arrangement of display modules and LED elements in an LED tiling display. [Figure 2] FIG. 1 is a diagram illustrating an example of the configuration of an image display system to which the present technology is applied. [Figure 3] FIG. 2 illustrates an example of the configuration of a controller. [Figure 4] FIG. 2 is a diagram illustrating an example of the configuration of a display unit. [Figure 5] FIG. 1 is a diagram illustrating an example of the configuration of a display device. [Figure 6] FIG. 2 is a diagram illustrating an example of the configuration of a display module. [Figure 7] FIG. 10 is a diagram illustrating the shrinkage of a circularly polarizing film. [Figure 8] 10A and 10B are diagrams illustrating reflection of external light on a display unit. [Figure 9] FIG. 10 is a diagram illustrating the angle at which light from the edge of a circularly polarizing film is observed. [Figure 10] 10A and 10B are diagrams illustrating application of a resin material. [Figure 11] 10A and 10B are diagrams illustrating application of a resin material. [Figure 12] 10A and 10B are diagrams illustrating application of a resin material. [Figure 13] 10A and 10B are diagrams illustrating degradation of display quality due to light from the edge of a circularly polarizing film. [Figure 14] 10A to 10C are diagrams illustrating a method for applying a resin material. [Figure 15] 10A to 10C are diagrams illustrating a method for applying a resin material. [Figure 16] 10A to 10C are diagrams illustrating a method for applying a resin material. [Figure 17] 10A to 10C are diagrams illustrating a method for applying a resin material. [Figure 18] 10 is a flowchart illustrating a manufacturing process. [Figure 19] FIG. 10 is a diagram illustrating another configuration example of the display module. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments to which the present technology is applied will be described with reference to the drawings.

[0015] First Embodiment About this technology This technology relates to display modules that use LED elements as light sources, and LED tiling displays that are configured by arranging multiple display modules.

[0016] This technology suppresses the reflection of external light by attaching a film to the display module to reduce the light (external light) that enters from the outside and is reflected by the display module, thereby improving display quality.

[0017] An LED tiling display is a display device obtained by arranging any number of display modules in a tiled pattern.

[0018] Furthermore, the display module that constitutes such an LED tiling display is a panel-shaped (flat) display device obtained, for example, by aligning and mounting multiple LED elements, which serve as light sources for displaying images, on an electronic substrate.

[0019] In general, external light entering a display module from the outside is reflected by the metal material of the LED element part, and by parts other than the LED element inside the display module. Therefore, in a general display module, the display quality of the displayed image, that is, the bright area contrast as a display element, is reduced due to the reflection of external light that occurs in such LED element parts.

[0020] On the other hand, organic LED display devices are sometimes provided with a circularly polarizing film to reduce reflection of external light on the display surface.

[0021] As such a circularly polarizing film, a film that combines a linearly polarizing film (hereinafter simply referred to as a polarizing film) and a quarter-wave film is generally used.

[0022] For example, a polarizing film can be obtained by uniaxially stretching a hydrophilic polymer film onto which iodine or a dichroic dye is adsorbed. In particular, a polyvinyl alcohol film onto which iodine is adsorbed is preferably used as the polarizing film.

[0023] Unlike conventional televisions and monitors, the display modules that make up LED tiling displays have a display surface that covers the entire surface, meaning there are no bezels around the edges of the display module. Therefore, display quality all the way to the periphery of the display surface is important.

[0024] In an LED tiling display, for example, a display module MJ11-1 and a display module MJ11-2 are arranged at a predetermined interval as shown in Fig. 1. Hereinafter, when there is no need to particularly distinguish between the display module MJ11-1 and the display module MJ11-2, they will also be simply referred to as the display module MJ11.

[0025] In this example, in the display module MJ11-1, a plurality of LED elements including LED elements EL11-1 to EL11-3 are arranged at equal intervals in the vertical and horizontal directions in the figure. Similarly, in the display module MJ11-2, a plurality of LED elements including LED elements EL11-4 and EL11-5 are arranged at equal intervals in the vertical and horizontal directions in the figure.

[0026] Hereinafter, when there is no need to particularly distinguish between the LED elements provided in the display module MJ11, such as the LED elements EL11-1 to EL11-5, they will also be simply referred to as the LED elements EL11.

[0027] In the example shown in FIG. 1, the distance between adjacent LED elements EL11 in the display module MJ11, that is, the arrangement pitch of the LED elements EL11 in the display module MJ11, is L11.

[0028] In an LED tiling display, one image is displayed using multiple display modules MJ11, so the distance L12 between the outermost LED elements EL11 of adjacent display modules MJ11 must be approximately equal to the arrangement pitch L11 of the LED elements EL11.

[0029] In this example, for example, the LED element EL11-3 arranged at the position closest to the end of the display module MJ11-1 is the LED element EL11 on the outermost periphery of the display module MJ11-1.

[0030] Additionally, the LED element EL11-4 arranged closest to the edge of the display module MJ11-2 is the LED element EL11 on the outermost periphery of the display module MJ11-2. Furthermore, among the LED elements EL11 provided in the display module MJ11-2, this LED element EL11-4 is arranged closest to the LED element EL11-3.

[0031] Therefore, the distance between the LED element EL11-3 and the LED element EL11-4 is the distance L12 between the outermost LED elements EL11 in the adjacent display modules MJ11. Hereinafter, this distance L12 will also be referred to as the arrangement pitch of the LED elements EL11 between the display modules MJ11.

[0032] To make the arrangement pitch L12 the same distance as the arrangement pitch L11, the distance L13 from the LED element EL11 at the outermost periphery of the display module MJ11 to the outermost edge of the display module MJ11, i.e., the edge of the display module MJ11, must be less than half (1 / 2) of the arrangement pitch L11. Also, in consideration of the case where there is a distance between two adjacent display modules, the distance L13 may be less than half (1 / 2) of the arrangement pitch L11.

[0033] In this example, the distance L13 is from the outermost periphery of the display module MJ11-2, that is, the LED elements EL11-4 and EL11-5 located closest to the edge of the display module MJ11-2, to the edge (outermost shape) of the display module MJ11-2.

[0034] In an LED tiling display, the arrangement pitch L11 of the LED elements EL11 may be set to several hundred microns due to the trend toward higher resolution display image quality. Since the distance L13 from the LED elements EL11 at the outermost periphery of the display module MJ11 to the outermost edge of the display module MJ11 is set to less than half the arrangement pitch L11 of the LED elements EL11, a smaller arrangement pitch L11 results in a narrower arrangement of the display modules MJ11.

[0035] When using a circular polarizing film such as that used in the organic LED display device described above in such an LED tiling display, the dimensions and quality of the edge portions of the circular polarizing film become extremely important.

[0036] However, with conventional circular polarizing films, moist heat shrinkage occurs depending on the temperature and humidity of the environment in which they are used, which can make it impossible to cover the entire edge of the display surface of the display module with the circular polarizing film.In addition, moisture can penetrate the edge of the circular polarizing film, causing iodine to dissolve, which can cause the polarization function of the film around the edge to be lost.

[0037] Furthermore, when a typical circularly polarizing film is used, the light emitted from the LED elements inside the display module, i.e., the inside of the display surface, is guided to the periphery, i.e., the edge, of the circularly polarizing film, causing the edge to emit light, which can reduce the image quality (grade) of the displayed image.

[0038] This technology reduces the occurrence of moist heat shrinkage, iodine dissolution, and light emission at the edges of the circular polarizing film by making the thickness of the polarizing film 10 μm or less, using a specific material for the protective layer that makes up the circular polarizing film, and applying a colored resin material to the edges of the circular polarizing film, thereby improving the display quality of images in LED tiling displays, i.e., display modules.

[0039] <Image display system configuration example> Now, this technology will be described in more detail.

[0040] FIG. 2 is a diagram showing an example of the configuration of an embodiment of an image display system to which the present technology is applied.

[0041] The image display system shown in FIG. 2 includes a video server 11, a controller 12, and a display device 13.

[0042] The video server 11 consists of one or more external devices, such as a personal computer or a recorder, and supplies the video signal of the content to be played on the display device 13 to the controller 12 and controls the operation of the controller 12 as appropriate.

[0043] The controller 12 performs predetermined signal processing on the video signal supplied from the video server 11, supplies the resulting video signal to the display device 13, and performs playback control processing such as starting and stopping playback of content in response to commands from the video server 11.

[0044] For example, the controller 12 performs signal processing based on a video signal of a content to generate a plurality of split video signals that display parts of an image (video) based on the video signal, and supplies the obtained plurality of split video signals to the display device 13. Here, the split video signals are generated so that an image based on the video signal of the content is displayed by, for example, displaying each of the images based on the plurality of split video signals side by side. Note that the split video signals may be generated by the video server 11.

[0045] The display device 13 is a panel-shaped (flat-plate-shaped) LED tiling display that displays images using LED elements as light sources, and has N display units 21-1 to 21-N.

[0046] The display units 21-1 to 21-N are each made up of a plurality of display modules corresponding to the above-mentioned display module MJ11, and cause the display modules to display images based on the divided video signals supplied from the controller 12.

[0047] In the following description, when there is no need to particularly distinguish between the display units 21-1 to 21-N, they will also be simply referred to as display units 21.

[0048] In this example, each display unit 21 functions as one display device, and the N display units 21 are arranged in a tiled pattern and connected to form the display device 13.

[0049] 2 has been described as an example in which one controller 12 is provided for the display device 13. However, the present invention is not limited to this, and any number of controllers 12 may be provided for the display device 13, and one or more different display units 21 may be connected to each of the controllers 12.

[0050] In such a case, the video server 11 supplies each of the controllers 12 with a divided video signal that displays a portion of an image based on the video signal of the content corresponding to that controller 12. Then, based on the divided video signal supplied from the video server 11, each controller 12 generates a divided video signal to be supplied to the display unit 21 connected to itself.

[0051] <Example of controller and display unit configuration> The controller 12 and the display unit 21 shown in FIG. 2 are configured, for example, as shown in FIGS.

[0052] FIG. 3 is a diagram illustrating an example of the configuration of the controller 12. As shown in FIG.

[0053] In this example, the controller 12 has a network I / F (Interface) 51, an MPU (Micro Processing Unit) 52, a signal input I / F 53, a signal processing circuit 54, a DRAM (Dynamic Random Access Memory) 55, a signal distribution circuit 56, and signal output I / Fs 57-1 to 57-N.

[0054] The controller 12 is connected to a personal computer (PC (Personal Computer)) or the like serving as a video server 11 via a network such as a LAN (Local Area Network), so that the operation of the controller 12 can be controlled by the PC or the like.

[0055] The network I / F 51 supplies various commands received from a PC or the like to the MPU 52, and transmits responses to commands or the like supplied from the MPU 52 to the PC or the like.

[0056] The MPU 52 controls the signal processing circuit 54 in response to commands supplied from the network I / F 51, causes the signal processing circuit 54 to execute signal processing in response to commands from a PC or the like, and supplies the execution results to the network I / F 51 as a response to the commands.

[0057] For example, the MPU 52 instructs the signal processing circuit 54 to perform various signal processes such as generating divided video signals, and to perform playback control processes such as stopping playback of content.

[0058] In addition, the controller 12 is connected to a PC or recorder as a video server 11 via a cable connected to an input terminal that complies with standards such as HDMI (registered trademark) (High-Definition Multimedia Interface), DVI (Digital Visual Interface), or DP (DisplayPort).

[0059] The signal input I / F 53 supplies a video signal of content input from a PC, a recorder, or the like via a cable, an input terminal, or the like to the signal processing circuit 54.

[0060] The signal processing circuit 54 performs various signal processing operations on the video signal supplied from the signal input I / F 53 under the control of the MPU 52. At this time, the signal processing circuit 54 appropriately supplies data required for the signal processing to the DRAM 55 for storage therein, or reads out data stored in the DRAM 55 for use in the signal processing. Furthermore, for example, the signal processing circuit 54 appropriately supplies the signal obtained by the signal processing to the signal distribution circuit 56.

[0061] For example, signal processing in the signal processing circuit 54 generates N divided video signals corresponding to the N display units 21. Furthermore, the signal processing circuit 54 performs signal processing relating to the entire content or the entire display device 13, such as color correction for the entire image based on the video signal.

[0062] The signal distribution circuit 56 distributes (outputs) the divided video signals corresponding to the N display units 21 supplied from the signal processing circuit 54 to the signal output I / Fs 57-1 to 57-N corresponding to those display units 21.

[0063] The signal output I / F 57-1 to the signal output I / F 57-N are connected to the display units 21-1 to 21-N via cables or the like.

[0064] The signal output I / F 57-1 to signal output I / F 57-N supply the divided video signals supplied from the signal distribution circuit 56 to the connected display units 21-1 to 21-N.

[0065] In the following description, when there is no need to particularly distinguish between the signal output I / F 57-1 to the signal output I / F 57-N, they will also be simply referred to as the signal output I / F 57.

[0066] FIG. 4 is a diagram showing an example of the configuration of the display unit 21. As shown in FIG.

[0067] In this example, the display unit 21 includes a driver control circuit 81 and display modules 82-1 to 82-M.

[0068] The driver control circuit 81 receives the divided video signal from the signal output I / F 57 of the controller 12, controls the display modules 82-1 to 82-M, and causes the display modules 82-1 to 82-M to display images based on the divided video signal.

[0069] The driver control circuit 81 has a signal input I / F 91, a signal processing circuit 92, a DRAM 93, and signal output I / Fs 94-1 through 94-M.

[0070] The signal input I / F 91 supplies the divided video signal supplied from the signal output I / F 57 of the controller 12 to the signal processing circuit 92 .

[0071] The signal processing circuit 92 performs various signal processing operations on the divided video signals supplied from the signal input I / F 91, which are performed individually for each display unit 21. At this time, the signal processing circuit 92 appropriately supplies data required for the signal processing to the DRAM 93 to be stored therein, or reads out data stored in the DRAM 93 and uses it for the signal processing.

[0072] For example, the signal processing circuit 92 generates drive signals based on the divided video signals to drive the display modules 82-1 to 82-M to display images based on the divided video signals, and supplies the drive signals to the signal output I / F 94-1 to signal output I / F 94-M.

[0073] The signal output I / F 94-1 through the signal output I / F 94-M are connected to the display modules 82-1 through 82-M. The signal output I / F 94-1 through the signal output I / F 94-M supply the drive signals supplied from the signal processing circuit 92 to the connected display modules 82-1 through 82-M.

[0074] In the following description, when there is no need to particularly distinguish between the signal output I / F 94-1 to the signal output I / F 94-M, they will also be simply referred to as the signal output I / F 94.

[0075] The display modules 82-1 to 82-M emit light based on the drive signals supplied from the signal output I / Fs 94-1 to 94-M, thereby displaying images corresponding to the drive signals. As a result, the display modules 82-1 to 82-M display images based on the divided video signals, i.e., portions of the content images.

[0076] The display module 82-1 has a plurality of driver integrated circuits (ICs) 111-1 through 111-K and LED elements 112-1-1 through 112-3-K.

[0077] Driver IC 111-k (where k = 1, 2, ..., K) drives LED elements 112-1-k to LED elements 112-3-k (where k = 1, 2, ..., K) to emit light based on a drive signal supplied from signal output I / F 94-1 directly or via another driver IC or circuit.

[0078] LED elements 112-1-k to 112-3-k (where k = 1, 2, ..., K) are light-emitting elements that output light of each color, for example, R, G, or B, and emit light under the control of driver IC 111-k (where k = 1, 2, ..., K).

[0079] Also, although not indicated by symbols to make the drawings easier to understand, similar to display module 82-1, other display modules 82-m (where m = 2, ..., M) are also provided with driver ICs and LED elements corresponding to driver IC 111-1 to driver IC 111-K, and LED elements 112-1-1 to LED elements 112-3-K.

[0080] In the following description, the display modules 82-1 to 82-M will be simply referred to as the display modules 82 when there is no need to particularly distinguish between them.

[0081] Furthermore, hereinafter, when there is no need to particularly distinguish between driver IC 111-1 to driver IC 111-K, they will also be simply referred to as driver IC 111. hereinafter, when there is no need to particularly distinguish between LED elements 112-1-1 to LED elements 112-3-K, they will also be simply referred to as LED elements 112.

[0082] <Display module configuration example> As described with reference to FIGS. 2 to 4, the display device 13 is obtained by arranging a plurality of display modules 82 in a tiled manner.

[0083] Specifically, for example, as shown in FIG. 5, the display device 13 has a plurality of panel-shaped (flat-plate-shaped) display modules 82 each having a plurality of LED elements 112 serving as a light source for displaying an image.

[0084] In particular, in the display device 13, the display unit 21, called a cabinet, obtained by arranging a plurality of display modules 82 in a tiled pattern is the smallest unit that functions as a display device. In the example shown in Fig. 4, one display unit 21 is composed of M display modules 82.

[0085] Furthermore, a plurality of such display units 21 are arranged in a tiled pattern and connected to form one display device 13.

[0086] 2, the display device 13 is configured by N display units 21. Therefore, in this example, one surface (plane) formed by the surfaces of (M×N) display modules 82 serves as the display surface of the display device 13. Therefore, no frame is provided around the outer periphery (edge ​​portion) of the display modules 82 or the display units 21.

[0087] The controller 12 independently controls each of the multiple display units 21 that make up the display device 13, and causes the LED elements 112 provided in each display module 82 to emit light, thereby displaying an image on the entire display surface of the display device 13.

[0088] The size and shape of each of the plurality of display modules 82 constituting the display device 13 may be the same, or there may be display modules 82 of different shapes and sizes. Similarly, the size and shape of each of the plurality of display units 21 constituting the display device 13 may be the same, or there may be display units 21 of different shapes and sizes.

[0089] Furthermore, the number of display modules 82 constituting the display device 13 or the display unit 21, and the number of display units 21 constituting the display device 13 may also be any number.

[0090] Next, a more detailed configuration example of the display module 82 will be described.

[0091] The display module 82 has a panel-shaped (flat) display unit 151 and a circular polarizing film 152 arranged on the surface of the display unit 151, as shown in FIG.

[0092] 6 shows a cross-sectional view of the display module 82 as seen from a direction parallel to the surface (front surface) that serves as the image display surface of the display module 82. In other words, FIG. 6 shows a cross-sectional view of the display module 82 as seen from a direction perpendicular to the normal to the display surface of the display module 82.

[0093] In this example, the display unit 151 is made up of an electronic substrate 161 and a planarizing layer 162 formed on the surface of the electronic substrate 161 on the circularly polarizing film 152 side.

[0094] In particular, here, a plurality of LED elements including LED elements 171-1 to 171-3 are mounted on the surface of electronic substrate 161 facing circularly polarizing film 152 and arranged at predetermined intervals.

[0095] These LED elements such as LED element 171-1 to LED element 171-3 correspond to the LED element 112 shown in Fig. 4. In the following, when there is no need to particularly distinguish between the LED elements mounted in an aligned state on the electronic substrate 161, such as LED element 171-1 to LED element 171-3, they will also be simply referred to as LED element 171.

[0096] In the display unit 151, the periphery of the LED element 171 mounted on the electronic substrate 161, i.e., the mounting surface of the LED element 171, is flattened with a resin material 172 to form a flattened layer 162. In other words, in the flattened layer 162 provided between the electronic substrate 161 and the circularly polarizing film 152, each LED element 171 is covered with the resin material 172 that forms the flattened layer 162.

[0097] By forming such a planarization layer 162, the surface of the display unit 151 facing the circularly polarizing film 152 becomes flat, and the circularly polarizing film 152 can be placed on the display unit 151 without creating any gaps, thereby improving adhesion.

[0098] Furthermore, on the electronic substrate 161, a plurality of LED elements 171 are arranged at predetermined intervals in the horizontal and depth directions, i.e., at a predetermined arrangement pitch L21, which corresponds to the arrangement pitch L11 in FIG.

[0099] In addition, the distance from the outermost LED element 171 in the display module 82, i.e., the LED element 171 such as LED element 171-1 located closest to the edge (side) of the display unit 151, to the outermost LED element 171 in another display module 82 adjacent to that display module 82 is approximately the same as the arrangement pitch L21.

[0100] Therefore, the distance L22 from an LED element 171, such as LED element 171-1, arranged closest to the edge of the display unit 151 to the edge of the display unit 151 (the side surface of the display module 82) is less than half the arrangement pitch L21. This distance L22 corresponds to the distance L13 in Fig. 1. Note that the distance L22 may be equal to or less than half the arrangement pitch L21.

[0101] Furthermore, when the display module 82 is viewed from a direction perpendicular to the surface of the display module 82, the external shape, i.e., the shape and size, of the display unit 151 and the external shape (shape and size) of the circular polarizing film 152 are approximately the same (approximately equal), i.e., they are approximately the same shape and dimensions, and the display unit 151 and the circular polarizing film 152 are overlapping.

[0102] Furthermore, the above-mentioned driver IC 111 may be mounted on the electronic board 161, may be formed by lamination within the electronic board 161, or may be provided outside the electronic board 161 and electrically connected to the LED element 171.

[0103] The circular polarizing film 152 is a film for reducing external light that enters the display module 82 from the outside and is reflected on the surface of the display module 82 or inside the display module 82, and has, for example, a quarter-wave film, a protective layer, and a polarizing film.

[0104] In this example, the circular polarizing film 152 includes a quarter-wave film 181, a protective layer 182-1, a polarizing film 183, a protective layer 182-2, and a low-reflection layer 184.

[0105] The quarter-wave film 181 is a film that functions as a quarter-wave plate (quarter-λ plate), and is adhered to the surface of the planarizing layer 162 by an adhesive layer 185-1 made of an adhesive.

[0106] Furthermore, on the surface of the quarter wavelength film 181 opposite to the display unit 151 side, a protective layer 182-1 is provided via an adhesive layer 185-2 similar to the adhesive layer 185-1.

[0107] A polarizing film 183 is adhered to the surface of the protective layer 182-1 opposite to the quarter wavelength film 181 side by an adhesive layer 185-3 similar to the adhesive layer 185-1. The polarizing film 183 is a film that functions as a polarizing plate (linear polarizing plate).

[0108] Furthermore, a protective layer 182-2 is provided on the surface of the polarizing film 183 opposite to the protective layer 182-1 side via an adhesive layer 185-4 similar to the adhesive layer 185-1.

[0109] A low-reflection layer 184 is provided on the surface of protective layer 182-2 opposite to the polarizing film 183 side, i.e., the surface opposite to the display unit 151 side of display module 82. The surface of this low-reflection layer 184 becomes the display surface of image displayed by display module 82.

[0110] In the following, when there is no need to particularly distinguish between adhesive layers 185-1 to 185-4, they will simply be referred to as adhesive layer 185, and when there is no need to particularly distinguish between protective layer 182-1 and protective layer 182-2, they will simply be referred to as protective layer 182.

[0111] Furthermore, the adhesive layers 185 may be made of the same material or different materials, and similarly, the protective layers 182 may be made of the same material or different materials.

[0112] Furthermore, here we will explain an example in which the 1 / 4 wavelength film 181, polarizing film 183, etc. that make up the circularly polarizing film 152 are adhered by an adhesive layer 185 made of an adhesive, but this is not limiting and they may also be adhered by an adhesive layer made of a pressure-sensitive adhesive.

[0113] In the display module 82, the quarter wavelength film 181 and the polarizing film 183 are arranged side by side, so that the circular polarizing film 152 functions as a circular polarizer.

[0114] By providing such a circular polarizing film 152 to the display module 82, reflection of external light can be suppressed, and the display quality of the image on the display module 82, more specifically, the contrast of the image in bright areas, can be improved.

[0115] That is, by providing the circularly polarizing film 152, it is possible to reduce the amount of external light that is incident from the outside and reflected by the surface of the planarizing layer 162, the electronic substrate 161, the LED element 171, and the like.

[0116] Specifically, for example, assume that external light enters display unit 151 from outside display module 82 via circular polarizing film 152. In this case, the unpolarized external light becomes linearly polarized light when it passes through polarizing film 183, and then becomes circularly polarized light with a predetermined rotation direction, such as clockwise rotation, when it passes through quarter-wave film 181.

[0117] When this circularly polarized external light is reflected by the LED element 171 or the electronic board 161 , it becomes circularly polarized light rotated in the opposite direction to that at the time of incidence, for example, counterclockwise, and is incident on the ¼ wavelength film 181 .

[0118] In this way, the external light reflected by the LED element 171 or the electronic board 161 (hereinafter also referred to as reflected light) changes from circularly polarized light to linearly polarized light when it passes through the quarter-wave film 181, and the polarization direction of this reflected light is rotated by 90 degrees from the polarization direction of the external light that entered the quarter-wave film 181 from the polarizing film 183. In other words, the polarization direction of the reflected light that enters the polarizing film 183 from the quarter-wave film 181 is the same as the reflection axis (absorption axis) of the polarizing film 183.

[0119] Therefore, the reflected light that is reflected inside the display module 82, such as the LED elements 171 and the electronic board 161, and passes through the quarter-wave film 181 is blocked by the polarizing film 183. This makes it possible to suppress (reduce) the reflected light from inside the display module 82 and improve contrast in bright areas.

[0120] In fact, when a circular polarizer (circular polarizing film 152) is placed on the display unit 151, it has been confirmed that the reflectivity of the surface of the display module 82 is reduced to approximately 1 / 10, and the bright contrast of the displayed image is improved by approximately 10 times.

[0121] The display module 82 will now be described in more detail with reference to Figures 7 to 17.

[0122] 7 to 17, parts corresponding to those in Fig. 6 are given the same reference numerals, and their explanations will be omitted where appropriate. Also, parts corresponding to each other in Fig. 7 to 17 are also given the same reference numerals, and their explanations will be omitted where appropriate. Furthermore, in Fig. 7 to 17, for ease of viewing, the reference numerals have been omitted for some of the parts corresponding to those in Fig. 6.

[0123] For example, the circular polarizing film 152 uses a quarter-wave film 181 optimized for wavelengths around 550 nm, where visibility is high. Note that, in order to improve wavelength dispersion characteristics, circular polarizing film 152 may be formed by laminating half-wave films or quarter-wave films so that their optical axes are perpendicular to each other.

[0124] Furthermore, a film obtained by uniaxially stretching a hydrophilic polymer film that has been colored by adsorbing iodine or a dichroic dye can be used as the polarizing film 183. In particular, a polyvinyl alcohol film that has adsorbed iodine can be suitably used as the polarizing film 183.

[0125] Since typical polarizing films are produced by stretching, the film may shrink depending on the temperature and humidity of the usage environment.

[0126] If shrinkage of polarizing film 183 occurs, for example, as shown in Figure 7, circularly polarizing film 152, which is attached with the same outline as display unit 151, will shrink, and part of the surface of display unit 151 will be exposed.

[0127] In this example, due to shrinkage of the circularly polarizing film 152, the portion of the surface of the planarizing layer 162 in the display section 151 indicated by the arrow A11 is exposed.

[0128] When a part of the surface of the display unit 151 is exposed in this way, the display quality of the image in the exposed part is reduced, as shown in FIG.

[0129] That is, when external light is incident on an unexposed portion of display unit 151 as indicated by arrow A21, reflection of the external light is suppressed (reduced) by circular polarizing film 152. Therefore, in the unexposed portion of display unit 151, reflection of external light is suppressed, and a sufficiently high display quality, that is, a sufficiently high bright area contrast, can be obtained.

[0130] In contrast, when external light is incident on an exposed portion of display unit 151 as indicated by arrow A22, the external light is reflected back directly from the surface of planarization layer 162 without passing through circular polarizing film 152. In other words, since circular polarizing film 152 is not present on the optical path of this external light, the external light reflected from the surface of planarization layer 162 returns as is.

[0131] Therefore, in the exposed portion of the display unit 151, the reflection of external light is not reduced, and the display quality of the image in that portion, that is, the bright area contrast, is reduced.

[0132] Furthermore, if shrinkage of the circularly polarizing film 152 shown in Figure 7 occurs and the edge portion of the surface of the display unit 151 becomes exposed, light from the edge of the circularly polarizing film 152 becomes more easily observed even at angles closer to the front, as shown in Figure 9, for example.

[0133] Specifically, for example, as shown on the left side of Figure 9, when the surface of display unit 151 is not exposed, some of the light output from LED element 171-1 located closest to the edge (side) of display unit 151 is emitted from the edge portion of circularly polarized film 152.

[0134] In this case, if the angle θ is the angle between the direction perpendicular to the surface of circularly polarizing film 152, i.e., the normal direction, and the direction in which light from LED element 171-1 emitted from the end portion of circularly polarizing film 152 travels, then angle θ will be a fairly large angle.

[0135] Therefore, a user viewing an image displayed on display module 82 from the front direction of display module 82 or from a direction slightly oblique to the front direction will not observe the light output by LED element 171-1 and emitted from the edge portion of circular polarizing film 152 at angle θ. Therefore, an image is presented to the user with sufficient display quality.

[0136] In contrast to this, for example, as shown on the right side of Figure 9, when the edge portion of the surface of display unit 151 is exposed, some of the light output from LED element 171-1 located closest to the edge of display unit 151 is emitted from the edge portion of circularly polarizing film 152.

[0137] In this case, if the angle between the direction perpendicular to the surface of circularly polarizing film 152 and the direction in which light from LED element 171-1 emitted from the end portion of circularly polarizing film 152 travels is defined as angle θ', then angle θ' will be smaller than the above-mentioned angle θ.

[0138] Therefore, even when a user is viewing an image displayed on display module 82 from a direction close to the front of display module 82, the light output by LED element 171-1 and emitted from the edge portion of circularly polarizing film 152 at angle θ' can be easily observed.

[0139] When a user observes light emitted from the edge of such circularly polarizing film 152, the outline of the displayed image, i.e., the outline of display module 82, appears bright to the user, thereby reducing the display quality of the image.

[0140] Specifically, for example, if the arrangement pitch L21 of the above-mentioned LED elements 171 is 1.26 mm, and circularly polarizing film 152 shrinks by about 30 μm, angle θ′ becomes about 45 degrees. In this case, light emitted from the edge portion of circularly polarizing film 152 will be observed by a user viewing display module 82 from a direction at 45 degrees relative to the front of display module 82.

[0141] In order to suppress the above-described shrinkage of the circular polarizing film 152, a possible configuration is to set the vertical thickness of the polarizing film 183 in Fig. 6 to 10 µm or less in the display module 82 to which the present technology is applied. This is because the present applicant has found that setting the thickness of the polarizing film 183 to 10 µm or less can more effectively suppress the wet heat shrinkage of the circular polarizing film 152. However, the vertical thickness of the polarizing film 183 is not limited to 10 µm or less.

[0142] In this way, by forming the circular polarizing film 152 using a polarizing film 183 having a thickness of 10 μm or less, it is possible to suppress the shrinkage of the circular polarizing film 152 due to the temperature and humidity of the usage environment, and more effectively improve the display quality of the image, i.e., the contrast in bright areas.

[0143] Specifically, the display module 82 to which the present technology is applied can suppress the occurrence of reflection of external light at the exposed portion of the display unit 151 described with reference to FIG. 8 and the observation of light from the edge portion of the circularly polarizing film 152 described with reference to FIG. 9.

[0144] Furthermore, the protective layer 182-1 and the protective layer 182-2 of the display module 82 shown in FIG. 6 may be made of, for example, a film of triacetyl acetate (TAC (Tri-Acetyl Cellulose)), acrylic (PMMA (Poly Methyl Methacrylate)), cycloolefin polymer (COP (Cyclo Olefin Polymer)), polyethylene terephthalate (PET (Poly Ethylene Terephthalate)), or the like.

[0145] In particular, the applicant has found that by using a film made of COP or PET as the protective layer 182, wet heat shrinkage of the circularly polarizing film 152 can be suppressed.

[0146] Therefore, by forming protective layer 182 from COP or PET, it is possible to further suppress shrinkage of circularly polarizing film 152 and improve the display quality of images. Alternatively, for example, a polymer film other than COP or PET that has low water absorption, such as COP or PET, that has a water absorption rate of a predetermined value or less, may be used as protective layer 182.

[0147] Furthermore, the surface of the display module 82, that is, the surface of the circular polarizing film 152, may be subjected to low-reflection treatment.

[0148] 6, in a display module 82 to which the present technology is applied, a low-reflection layer 184 is provided on the surface of the circular polarizing film 152, that is, on the surface of the circular polarizing film 152 opposite to the display unit 151 side. The low-reflection layer 184 reduces reflection of external light incident from the outside at the low-reflection layer 184 portion.

[0149] Therefore, by providing such a low-reflection layer 184, it is possible to reduce the reflection of external light incident on the surface (low-reflection layer 184) of the circular polarizing film 152 from the outside, thereby improving the contrast in bright areas.

[0150] The low-reflection layer 184 may be provided by any method.

[0151] Specifically, for example, a low-reflection layer 184 may be added to the surface (front surface) of the protective layer 182-2 of the circularly polarizing film 152 opposite to the display unit 151 by a known coating method or vapor deposition method.

[0152] Alternatively, for example, a film that has been subjected to low reflection treatment, such as an anti-reflection film (AR (Anti Reflection) film) or a low reflection film (LR (Low Reflection) film), may be attached to the surface (surface) of the protective layer 182-2 opposite to the display unit 151 to form the low reflection layer 184.

[0153] In addition, polarizing films generally have iodine adsorbed onto polyvinyl alcohol films, but in high-humidity environments, the iodine can dissolve from the edge surfaces of such polarizing films, causing the polarizing films to become transparent.

[0154] For example, in the display module 82 shown in FIG. 6, if iodine dissolves from the polarizing film 183 and causes it to become transparent, the function of the circular polarizing film 152 will be reduced, resulting in a decrease in bright-light contrast.

[0155] Therefore, in order to prevent iodine from dissolving from the polarizing film 183, the edges of the display module 82, that is, at least a part of the side surfaces of the display module 82, may be coated with a moisture-proof resin material.

[0156] Specifically, as shown in FIG. 10, for example, a resin material 231 having moisture-proof properties is applied to a portion of the edge portion (side surface) of the circular polarizing film 152 so that at least the edge portion of the polarizing film 183 is covered by the resin material 231.

[0157] Furthermore, for example, as shown in FIG. 11, the resin material 231 may be applied to the entire end portion (side surface) of the circularly polarizing film 152 so that the entire end portion of the circularly polarizing film 152 is covered with the resin material 231.

[0158] 12, for example, a resin material 231 may be applied to the edge portions (side surfaces) of the display module 82 so that the entire edge portion of the circular polarizing film 152 and at least a part of the edge portion of the display unit 151 are covered with the resin material 231. In this example, of the edge portions of the display unit 151, the entire edge portion of the planarizing layer 162 and a part of the edge portion of the electronic substrate 161 are covered with the resin material 231. By arranging the resin material in this manner, the resin material can be more effectively adhered.

[0159] 10 to 12, among the edge portions of the display module 82, at least the edge portion of the polarizing film 183 is covered with the moisture-proof resin material 231, which can prevent moisture from entering the polarizing film 183 from the outside. This can suppress the elution of iodine from the polarizing film 183, i.e., the polarizing film 183 from becoming transparent, and can improve contrast in bright areas.

[0160] In the examples shown in FIGS. 10 to 12, the resin material 231 may be an olefin-based, acrylic-based, allyl-based, epoxy-based, polyester-based, urethane-based, silicone-based, or fluorine-based resin.

[0161] In this case, for example, if the moisture permeability of the resin material 231 is 100 g / m 2 It is effective if the moisture permeability is 100 g / m² for 24 hours at 40°C and 90% RH or less. For example, when the moisture permeability is measured in accordance with JIS Z 0208 "Test method for moisture permeability of moisture-proof packaging materials" under the conditions of 40°C and 90% RH as specified in condition B of JIS Z 0208 "Test method for moisture permeability of moisture-proof packaging materials," 2 A resin material 231 having a durability of 24 hours or more can be used.

[0162] The resin material 231 may be a solvent-soluble resin such as the above-mentioned materials, or a reactive curing resin such as a UV-curable, heat-curable, moisture-curable, or two-component reactive resin such as the above-mentioned materials. In particular, by using a reactive curing resin as the resin material 231, higher durability can be achieved.

[0163] 13, for example, a plurality of LED elements including LED elements 171-1 to 171-10 are arranged inside the planarization layer 162 of the display unit 151. Note that hereinafter, when there is no need to particularly distinguish between the LED elements 171-1 to 171-10, they will also be simply referred to as LED elements 171.

[0164] For example, assume that LED elements 171-8 to 171-10 located near the center of display unit 151 are lit (emitting light), and LED elements 171-1 to 171-7 located outside of these LED elements 171, i.e., on the outer periphery (edge ​​side) of display unit 151, are turned off. Also, assume that resin material 231 is not applied to the edge portion of display module 82.

[0165] In such a case, for example, some of the light emitted by LED element 171 located near the center of display unit 151, i.e., LED element 171-8 in this example, may become stray light, and this stray light may pass through the inside of circularly polarizing film 152 and exit from the edge portion of circularly polarizing film 152.

[0166] In other words, even if the peripheral portion of display unit 151 is turned off, the light output from LED element 171 in the center of display unit 151 may cause the edge portion of circularly polarizing film 152 to emit light.

[0167] If such light emission occurs at the edge portion of the circularly polarizing film 152, the display quality of the image, that is, the contrast in bright areas, will be reduced.

[0168] Therefore, in addition to providing the above-described resin material 231 on the edge (side) portion of the display module 82, the resin material 231 may be colored black. In other words, the resin material 231 may have an edge emission prevention function.

[0169] In this way, stray light generated by light emission from LED element 171 located near the center of display unit 151 can be absorbed by resin material 231, and stray light can be prevented from emitting from the edge portions of circularly polarizing film 152. This can improve contrast in bright areas.

[0170] For example, black inorganic pigments such as carbon black, titanium black, and metal composite oxide particles, various black organic pigments, organic dyes, etc. can be used to color resin material 231. Furthermore, with regard to the color intensity of resin material 231, for example, by setting the optical density (OD) value at the thickness of resin material 231 at the edge portion of circularly polarizing film 152 to 2.0 or more, or even 2.5 or more, it is possible to more effectively prevent the emission of stray light.

[0171] In order to prevent stray light from leaking (emitting) from the edge portions of the circularly polarizing film 152, it is conceivable to cover at least the entire edge portions of the circularly polarizing film 152 with a resin material 231, as shown in FIG. 11, for example.

[0172] Furthermore, as shown in FIG. 12, for example, by covering not only the edge portion of the circularly polarizing film 152 but also at least a portion of the edge portion of the display unit 151 with the resin material 231, the resin material can be more effectively adhered.

[0173] Any method may be used to apply the resin material 231 to the end (side) portion of the display module 82, but for example, the methods shown in FIGS. 14 to 17 are conceivable.

[0174] That is, for example, as shown in FIG. 14, a method is conceivable in which a liquid resin material is sprayed from a nozzle using compressed air from an air pressure dispenser, and the resin material is applied to the edge portion of the display module 82 as resin material 231.

[0175] Similarly, as shown in FIG. 15, for example, a method is also conceivable in which a liquid resin material is sprayed from a nozzle using a screw with a mechanical dispenser, and the resin material is applied to the edge portion of the display module 82 as resin material 231.

[0176] Furthermore, as shown in FIG. 16, for example, a method is also conceivable in which a piezoelectric jet dispenser is used, a piston is driven by a piezoelectric element to eject liquid resin material from a nozzle, and the resin material is applied to the edge portion of the display module 82 as resin material 231.

[0177] Alternatively, as shown in FIG. 17, a resin material applied to a printing plate may be applied to the edge portion of the display module 82 as a resin material 231 by printing, i.e., the resin material 231 may be applied by offset printing.

[0178] Manufacturing Process Description Next, a method for manufacturing the above-described display module 82 will be described. That is, the method for manufacturing the display module 82 will be described below with reference to the flowchart of FIG.

[0179] In step S11, as shown in FIG. 6, a plurality of LED elements 171 are aligned and mounted on an electronic substrate 161 at a predetermined pitch.

[0180] In step S12, the surface of the electronic substrate 161 on which the LED elements 171 are mounted, i.e., the mounting surface of the LED elements 171, is planarized with a resin material 172 to form a planarizing layer 162. In this way, the display unit 151 made up of the electronic substrate 161 and the planarizing layer 162 shown in FIG.

[0181] Then, in step S13, circularly polarizing film 152 is placed on the surface of planarizing layer 162 of display section 151, that is, on the surface of display section 151 on the side where LED elements 171 are arranged.

[0182] For example, the entire circularly polarizing film 152 may be adhered or stuck to the surface of the planarizing layer 162 using an adhesive or pressure-sensitive adhesive, or the quarter-wave film 181, protective layer 182, polarizing film 183, etc. may be laminated in order on the planarizing layer 162, so that the circularly polarizing film 152 is formed on the surface of the planarizing layer 162.

[0183] In this case, when the display module 82 is viewed from a direction perpendicular to the surface of the display module 82, the display unit 151 and the circular polarizing film 152 appear to have the same size and shape, and to overlap exactly.

[0184] In step S14, resin material 231 is applied to each end portion, that is, each side portion, of display module 82 made up of display section 151 and circular polarizing film 152, to form final display module 82.

[0185] For example, in step S14, resin material 231 is applied using a method such as that shown in Figures 14 to 17, so that at least the edge portions of polarizing film 183 are covered with resin material 231, as shown in Figures 10, 11, and 12.

[0186] Once the display module 82 is obtained, the manufacturing process is complete.

[0187] In this manner, display unit 151 is formed, circularly polarizing film 152 is added to display unit 151, and resin material 231 is applied to the circularly polarizing film 152 and the edge portions of display unit 151 to manufacture display module 82. In this manner, display module 82 with high image display quality, i.e., high contrast in bright areas, can be obtained.

[0188] A single display unit 21 is obtained by arranging a plurality of display modules 82 obtained in this manner, and a display device 13 is obtained by arranging a plurality of display units 21 in a tiled arrangement and connecting them.

[0189] <Modification 1 of the First Embodiment> <Other configuration examples of display modules> In the above, an example has been described in which the circular polarizing film 152 is used as a film for reducing external light that enters the display module 82 from the outside and is reflected on the surface of the display module 82 or inside the display module 82. However, such a film is not limited to the circular polarizing film 152, and a light-reducing film or the like may also be used.

[0190] When the display module 82 is provided with a light-reducing film, the display module 82 is configured as shown in FIG. 19, for example.

[0191] 19, parts corresponding to those in Fig. 6 are denoted by the same reference numerals, and descriptions thereof will be omitted where appropriate. Fig. 19 shows a cross-sectional view of display module 82 when viewed from a direction perpendicular to the normal to the display surface of display module 82.

[0192] In the example shown in FIG. 19, the display module 82 has a display unit 151 and a light-reducing film 301, and the display unit 151 has the same configuration as in FIG.

[0193] That is, in the display unit 151, a plurality of LED elements 171 are aligned and mounted at equal intervals at a predetermined pitch on an electronic substrate 161, and the portion of the LED elements 171 is flattened by a resin material 172 to form a flattening layer 162.

[0194] In this example, the distance from the LED element 171 located closest to the edge of the display unit 151 to the edge of the display unit 151 (the side of the display module 82) is less than half the arrangement pitch of the multiple LED elements 171 arranged within the display unit 151.

[0195] Furthermore, a light-reducing film 301 is disposed on the surface of the display section 151, that is, on the surface of the planarizing layer 162 opposite to the electronic substrate 161 side.

[0196] When the display module 82 is viewed from a direction perpendicular to the surface of the display module 82, the external shape, i.e., the shape and size, of the display unit 151 and the external shape (shape and size) of the dimming film 301 are approximately the same (approximately the same shape and dimensions), and the display unit 151 and the dimming film 301 are overlapping each other.

[0197] The light-reducing film 301 is a film for reducing external light that enters the display module 82 from the outside and is reflected on the surface of the display module 82 or inside the display module 82 .

[0198] For example, the light-reducing film 301 is a film with a neutral color tone such as gray in the visible light range, such as an ND (Neutral Density) film, and uniformly reduces the light components of each wavelength that enters the light-reducing film 301. In other words, the transmittance of each wavelength component in the light-reducing film 301 is approximately the same in the visible light range.

[0199] The dimming film 301 may be made of a film containing a coloring material such as carbon black or titanium black, or may be made of an adhesive or pressure-sensitive adhesive into which such a coloring material has been kneaded (or contained) and a film that is placed on top of the adhesive or pressure-sensitive adhesive and adhered or stuck to it.

[0200] In addition, a low-reflection layer 184 is provided on the surface of the dimming film 301 opposite to the display unit 151, i.e., the surface of the display module 82 opposite to the display unit 151, as in the example shown in Figure 6.

[0201] The low-reflection layer 184 may be added to the surface of the light-reducing film 301 by, for example, an existing coating method or vapor deposition method. Alternatively, the low-reflection layer 184 may be formed by laminating a film that has been subjected to low-reflection processing onto the surface of the light-reducing film 301.

[0202] By providing the above-described light-reducing film 301, it is possible to suppress reflection of external light on the display module 82, and improve the display quality of the image on the display module 82, more specifically, the contrast of the image in bright areas.

[0203] In other words, by providing a low-reflection layer 184 on the surface of the light-reducing film 301, it is possible to reduce the reflection of external light that enters the light-reducing film 301 from the outside on the surface (low-reflection layer 184) of the light-reducing film 301.

[0204] Furthermore, external light that enters the interior of the light-reducing film 301 from the outside is dimmed by the light-reducing film 301, and as a result, the amount of external light that enters the light-reducing film 301 from the outside, is reflected inside the display unit 151, and is emitted to the outside of the light-reducing film 301 can be reduced.

[0205] As described above, according to the present technology, it is possible to improve the display quality of a display device, a display unit, or a display module.

[0206] It should be noted that the embodiments of the present technology are not limited to the above-described embodiments, and various modifications are possible within the scope of the present technology.

[0207] Furthermore, the present technology can also be configured as follows.

[0208] (1) A display unit; a film disposed on the display unit to reduce light incident from the outside and reflected by the display unit; and the display unit includes an electronic board and a plurality of LED elements arranged at predetermined intervals on a surface of the electronic board facing the film, The distance from the LED element closest to the edge of the display unit to the edge of the display unit is equal to or less than half the distance of the predetermined interval. Display module. (2) A low-reflection layer is provided on the surface of the film opposite to the display area, which reduces light that is incident from the outside and reflected on the surface of the film opposite to the display area. The display module according to (1). (3) When viewed from a direction perpendicular to the surface of the display unit, the outer shape of the display unit and the outer shape of the film are substantially the same. A display module according to (1) or (2). (4) The film is a circularly polarizing film. A display module according to any one of (1) to (3). (5) The circular polarizing film is composed of at least a quarter-wave film, a polarizing film, and a protective layer. (4) A display module according to the present invention. (6) The thickness of the polarizing film is 10 μm or less. (5) A display module according to (5). (7) The protective layer is made of COP or PET. A display module according to (5) or (6). (8) A resin material is applied to the side surface of the display module so as to cover at least an edge portion of the polarizing film. A display module according to any one of (5) to (7). (9) The resin material has a moisture-proof function. (8) A display module according to (8). (10) The resin material is applied to the side surface of the display module so as to cover an edge portion of the circular polarizing film and at least a part of an edge portion of the display unit. (8) A display module according to (8). (11) The moisture permeability of the resin material is 100 g / m under an environment of a temperature of 40°C and a humidity of 90% RH. 2 Less than 24 hours A display module according to any one of (8) to (10). (12) The resin material is colored black. A display module according to any one of (8) to (11). (13) The resin material has a function of preventing edge emission. A display module according to any one of (8) to (12). (14) The film is a light-reducing film. A display module according to any one of (1) to (3). (15) The transmittance of each wavelength component in the light-reducing film is approximately the same in the visible light range. (14) A display module according to (14). (16) The circularly polarizing film contains iodine A display module according to any one of (4) to (13). (17) The display unit has a planarization layer provided between the electronic substrate and the film, and the LED elements are covered with a resin material that forms the planarization layer. A display module according to any one of (1) to (16). (18) A display device having a plurality of display modules arranged in a tiled pattern, The display module includes: A display unit; a film disposed on the display unit to reduce light incident from the outside and reflected by the display unit; and the display unit includes an electronic board and a plurality of LED elements arranged at predetermined intervals on a surface of the electronic board facing the film, The distance from the LED element closest to the edge of the display unit to the edge of the display unit is equal to or less than half the distance of the predetermined interval. Display device. (19) A method for manufacturing a display module having a display unit and a film for reducing light that is incident from outside and reflected by the display unit, comprising: By arranging a plurality of LED elements on an electronic substrate at predetermined intervals, a display unit is formed that includes the electronic substrate and the plurality of LED elements, such that the distance from the LED element closest to an edge of the display unit to the edge of the display unit is equal to or less than half the distance of the predetermined interval; The film is disposed on the surface of the display unit on the side where the LED elements are disposed. A manufacturing method comprising the steps. (20) The method further includes applying a resin material to the side surface of the display module so that at least a portion of an edge of the film on the side surface of the display module is covered. (19) The manufacturing method according to (19). [Explanation of symbols]

[0209] 13 Display device, 21-1 to 21-N, 21 Display unit, 82-1 to 82-M, 82 Display module, 151 Display unit, 152 Circular polarizing film, 161 Electronic substrate, 162 Planarization layer, 171-1 to 171-10, 171 LED element, 181 1 / 4 wavelength film, 182-1, 182-2, 182 Protective layer, 183 Polarizing film, 184 Low reflection layer, 231 Resin material, 301 Dimming film

Claims

1. A display unit; a circular polarizing film disposed on the display unit to reduce light incident from the outside and reflected by the display unit; A display module having: the display unit includes an electronic substrate and a plurality of LED elements arranged at predetermined intervals on a surface of the electronic substrate facing the circularly polarizing film, the distance from the LED element closest to the edge of the display unit to the edge of the display unit is equal to or less than half the distance of the predetermined interval; A moisture-proof resin material is applied to the side surface of the display module so as to cover the edge portion of the circularly polarizing film and at least a part of the edge portion of the display unit. Display module.

2. A low-reflection layer is provided on the surface of the circular polarizing film opposite to the display unit, which reduces light that is incident from the outside and reflected on the surface of the circular polarizing film opposite to the display unit. The display module according to claim 1 .

3. When viewed from a direction perpendicular to the surface of the display unit, the outer shape of the display unit and the outer shape of the circularly polarizing film are substantially the same. The display module according to claim 1 .

4. The circular polarizing film is composed of at least a quarter-wave film, a polarizing film, and a protective layer. The display module according to claim 1 .

5. The thickness of the polarizing film is 10 μm or less. The display module according to claim 4 .

6. The protective layer is made of COP or PET. The display module according to claim 4 .

7. The moisture permeability of the resin material is 100 g / m² / 24 h or less in an environment where the temperature is 40°C and the humidity is 90% RH. The display module according to claim 1 .

8. The resin material is colored black. The display module according to claim 1 .

9. The resin material has a function of preventing edge emission. The display module according to claim 1 .

10. The circularly polarizing film contains iodine The display module according to claim 1 .

11. The display unit has a planarization layer provided between the electronic substrate and the circularly polarizing film, and the LED elements are covered with a resin material that forms the planarization layer. The display module according to claim 1 .

12. A display device having a plurality of display modules arranged in a tiled pattern, The display module includes: A display unit; a circular polarizing film disposed on the display unit to reduce light incident from the outside and reflected by the display unit; and the display unit includes an electronic substrate and a plurality of LED elements arranged at predetermined intervals on a surface of the electronic substrate facing the circularly polarizing film, the distance from the LED element closest to the edge of the display unit to the edge of the display unit is equal to or less than half the distance of the predetermined interval; A moisture-proof resin material is applied to the side surface of the display module so as to cover the edge portion of the circularly polarizing film and at least a part of the edge portion of the display unit. Display device.

13. A method for manufacturing a display module having a display unit and a circular polarizing film for reducing light incident from the outside and reflected by the display unit, comprising: By arranging a plurality of LED elements on an electronic substrate at predetermined intervals, a display unit is formed that includes the electronic substrate and the plurality of LED elements, such that the distance from the LED element closest to an edge of the display unit to the edge of the display unit is equal to or less than half the distance of the predetermined interval; The circularly polarizing film is disposed on a surface of the display unit on which the LED elements are disposed, A moisture-proof resin material is applied to the side surface of the display module so as to cover the edge portion of the circularly polarizing film and at least a part of the edge portion of the display unit. A manufacturing method comprising the steps.

Images