Display device

Abstract

A display device includes a substrate, a display element layer, pixels, and a light guide structure. The display element layer is disposed on the substrate. The pixels are disposed on the display element layer. The light guide structure is disposed on the display element layer. The substrate is a stretchable substrate, and the display element layer includes a first opening through which the light guide structure is bonded to the substrate.

Description

[Technical Field]

[0001] This invention relates to a display device. [Previous Technology]

[0002] When a display device uses fabric as its surface, the screen resolution of the display device is easily affected by the weaving method and mesh size of the fabric. For example, when the display device is stretched, the fabric and the display are prone to secondary misalignment, which causes the screen resolution of the display device to decrease. Therefore, when a display device uses fabric as its surface, how to effectively maintain the screen resolution of the display device becomes a very important part of the display device design. [Summary of the Invention]

[0003] This disclosure provides a display device with good screen resolution.

[0004] According to one embodiment of the present disclosure, a display device includes a substrate, a display element layer, pixels, and a light guide structure. The display element layer is disposed on the substrate. The pixels are disposed on the display element layer. The light guide structure is disposed on the display element layer. The substrate is a stretchable substrate, and the display element layer includes a first opening through which the light guide structure is bonded to the substrate.

[0005] Based on the above, in the display device of the disclosed embodiment, a display element layer is disposed on a substrate, pixels are disposed on the display element layer, and a light guide structure is disposed on the display element layer. The display element layer includes a first opening. The substrate is a stretchable substrate, and the light guide structure is bonded to the substrate through the first opening. Thus, when the substrate deforms due to external force, the light guide structure is bonded to the substrate, making the display device less prone to screen resolution degradation due to external force. In this way, the screen resolution of the display device can be greatly improved.

Implementation Method

[0007] FIG1 is a perspective view of a display device according to an embodiment of the present invention. The display device 100A of FIG1 includes a substrate 110 and a light guide structure 130.

[0008] Figure 2A is a top view of the display device of Figure 1. The display device of Figure 2A includes a display element layer 120, a plurality of pixels 123 and a plurality of first openings O1.

[0009] Figure 2B is a cross-sectional view of Figure 2A along line I-I'. The cross-sectional structure shown in Figure 2B can be applied to one or more of the multiple pixels 123 in Figure 2A, or even all the pixels 123 in the display device 100A. As shown in Figure 2B, the display device 100A includes a substrate 110, a display element layer 120, pixels 123, and a light guide structure 130.

[0010] The substrate 110 may have lines (not shown), and these pixels 123 are arranged in an array on the substrate 110, for example, along a first direction D1 (e.g., the X direction) and a second direction D2 (e.g., the Y direction), but are not limited thereto. Each pixel 123 may include a first sub-pixel 123A, a second sub-pixel 123B, and a third sub-pixel 123C. In some embodiments, each sub-pixel includes a light-emitting element, such as a light-emitting diode. The light-emitting diode may include, for example, an organic light-emitting diode (OLED), a sub-millimeter light-emitting diode (mini LED), a micro light-emitting diode (micro LED), or a quantum dot light-emitting diode (QD, such as QLED, QDLED), fluorescence, phosphorescence, or other suitable materials, and the materials may be arranged and combined in any way, but are not limited thereto. In some embodiments, the light-emitting element may be a light-emitting chip, and the sub-pixels may be coupled to the substrate 110 in a chip-on-board (COB) configuration, meaning that the light-emitting chip as a sub-pixel may be electrically connected to the circuitry on the substrate 110. In some embodiments, each sub-pixel may include a light-emitting chip as a light-emitting element and an encapsulation material encapsulating the light-emitting chip, and each sub-pixel may be coupled to the substrate 110 in a package-on-board (POB) configuration. In some embodiments, multiple sub-pixels of a single pixel 123, such as the first sub-pixel 123A, the second sub-pixel 123B, and the third sub-pixel 123C, may be encapsulated in the same encapsulation structure by the encapsulation material and coupled to the substrate 110 in a package-on-board (POB) configuration. Furthermore, although this embodiment uses the example of each pixel 123 comprising three sub-pixels (i.e., the first sub-pixel 123A, the second sub-pixel 123B, and the third sub-pixel 123C), it is not limited thereto. In other embodiments, each pixel 123 may have 2, 3, 4, 5 or other numbers of subpixels.

[0011] As shown in FIG. 2B, in the display device 100A, each pixel 123 includes a first sub-pixel 123A, a second sub-pixel 123B, and a third sub-pixel 123C, and the first sub-pixel 123A, the second sub-pixel 123B, and the third sub-pixel 123C are disposed on a substrate 110. In this embodiment, the display device 100A further includes a display element layer 120, and each of the sub-pixels (e.g., the first sub-pixel 123A, the second sub-pixel 123B, and the third sub-pixel 123C) can be coupled to the substrate 110 through the display element layer 120. In this embodiment, the display element layer 120 can be a conductive solder, such as an alloy solder. In other embodiments, the display element layer 120 can include a wire bonding material, such as a metal wire bonding material.

[0012] The substrate 110 may be a circuit board, an active element substrate, or other plate-like structure that can provide driving signals and / or power to the pixel 123 and support the pixel 123. In some embodiments, when the substrate 110 is a circuit board, the substrate 110 may include multiple conductive lines and multiple insulating layers for separating the multiple conductive lines, but is not limited thereto. Each sub-pixel may be coupled to the substrate 110 through the display element layer 120 and electrically connected to the substrate 110. In some embodiments, the sub-pixels (e.g., the first sub-pixel 123A, the second sub-pixel 123B, and the third sub-pixel 123C) are light-emitting diodes, and the sub-pixels have paired electrodes; however, FIG. 2B only schematically shows the state of the sub-pixels coupled to the substrate 110.

[0013] In this embodiment, the three sub-pixels 120 of pixel 123 have different emission colors. The three sub-pixels of pixel 123 may be a first sub-pixel 123A, a second sub-pixel 123B, and a third color sub-pixel 123C, respectively. The first color pixel 123A, the second sub-pixel 123B, and the third color sub-pixel 123C each have different emission colors, such as red, blue, and green sub-pixels, but are not limited thereto. In other embodiments, the emission colors of the sub-pixels may include red, green, blue, yellow, cyan, or other colors. In some embodiments, the sub-pixels may include light-emitting elements (e.g., light-emitting diodes), and the emission color of the sub-pixels may be determined by the light-emitting elements. In other embodiments, in addition to the light-emitting elements, the sub-pixels may also include light conversion elements (e.g., quantum dot layers) and / or color filter elements, and the emission color of the sub-pixels may be determined by one or more of the light-emitting elements, light conversion elements, and color filter elements. In some embodiments, all pixels 123 of the display device 100A may have the same number of sub-pixels, but are not limited thereto.

[0014] In this embodiment, the substrate 110 may include an elastic material, making the substrate 110 a stretchable substrate. A light guide structure 130 is disposed on the display element layer 120. The light guide structure 130 can cover the pixel 123. Furthermore, the display element layer 120 includes a first opening O1, through which the light guide structure 130 can adhere to the substrate 110. Thus, when the substrate 110 deforms due to external force, because the light guide structure 130 adheres to the substrate 110, the sub-pixels in the pixel 123 of the display device are less likely to shift. That is, the sub-pixels in the pixel 123 do not move relative to the substrate 110 in the first direction D1 or in the second direction D2. Therefore, the display device is less likely to experience misalignment of the sub-pixels in the pixel 123 due to external force, resulting in a decrease in screen resolution. Therefore, the screen resolution of the display device can be significantly improved.

[0015] The light guide structure 130 also includes a surface layer 140 disposed on a surface S1 of the light guide structure 130. The surface layer 140 may include different materials, such as soft materials, so that when a user touches the display device, he / she can first touch the surface layer 140 of the light guide structure 130, thus giving the display device a good tactile feel.

[0016] As shown in Figure 2C, the light guide structure 130 further includes a second opening O2, and the pixel 123 is disposed within the second opening O2. When the light guide structure 130 covers the pixel 123, the second opening O2 of the light guide structure 130 appropriately exposes the pixel 123, while simultaneously securing the pixel 123 within the second opening O2. Thus, when the substrate 110 deforms due to external force, because the light guide structure 130 is attached to the substrate 110 and the pixel 123 is securely located within the second opening O2, the sub-pixels in the pixel 123 of the display device are less likely to shift. That is, the sub-pixels in the pixel 123 do not move relative to the substrate 110 in the first direction D1 or in the second direction D2. In this way, the display device is less likely to experience misalignment of the sub-pixels in the pixel 123 due to external force, resulting in a decrease in screen resolution. Therefore, the screen resolution of the display device can be significantly improved.

[0017] As shown in FIG2D, in some embodiments, the display device 100A may further include a first adhesive layer 150 disposed between the display element layer 120 and the substrate 110. The display element layer 120 includes a first opening O1. The light guide structure 130 is attached to the first adhesive layer 150 through the first opening O1. Thus, when the substrate 110 is deformed by external force, the light guide structure 130 is attached to the first adhesive layer 150, and the first adhesive layer 150 is attached to the substrate 110, making it less likely for the pixels 123 in the display device to shift. That is, the sub-pixels in the pixels 123 move relative to the substrate 110 towards the first direction D1 or towards the second direction D2. Thus, the display device is less likely to experience misalignment of the sub-pixels in the pixels 123 due to external force, resulting in a decrease in screen resolution. Therefore, the screen resolution of the display device can be greatly improved. It should be noted that the first adhesive layer 150 shown in Figure 2D is only an example. The light guide structure 130 disclosed herein can be bonded to the first adhesive layer 150 through the first opening O1, and the light guide structure 130 can also be directly bonded to the substrate 110 through the first opening O1. Therefore, the display device can provide a variety of structures to meet different application requirements.

[0018] FIG2E is a top view schematic diagram of the display device according to another embodiment of FIG1 according to the present disclosure. FIG2F is a cross-sectional schematic diagram of FIG2E along I-I'. The difference between FIG2E and FIG2A is that the pixel 123 can be a plurality of pixels 123, which are distributed toward the first direction D1 or the second direction D2 respectively. The light guide structure 130 is disposed on the display element layer 120 and covers the plurality of pixels 123. When the three sub-pixels in a single pixel 123 are red, green and blue sub-pixels respectively, the sub-pixel arrangement can be selected from, for example, one of the following color orders: red-green-blue, blue-green-red, red-blue-green, green-blue-red, green-red-blue and blue-red-green, and is not limited to the color order shown in FIG2A. In some embodiments, any two of the above color orders can be selected to implement the sub-pixel arrangement of two adjacent pairs of the plurality of pixels 123, which helps to reduce or improve the color shift of the display device 100A. Therefore, the light guide structure 130 in the display device 100A can cover multiple pixels 123, and each pixel 123 can have sub-pixels with different arrangement orders, which can greatly improve the screen resolution of the display device.

[0019] FIG3 is a perspective view of a display device according to an embodiment of the present invention. The display device 100B of FIG3 includes a substrate 110, a light guide structure 130 and a fabric layer 180.

[0020] Figures 4A and 4B are top views of the display device in Figure 3. Figure 4C is a cross-sectional view of Figure 4B along line I-I'.

[0021] The difference between display device 100B and display device 100A is that display device 100B further includes a fabric layer 180 disposed on display element layer 120. The fabric layer 180 may be a stretchable material, such as thermoplastic polyurethane (TPU), polyurethane (PU), silicone, polyethylene (PE), thermoplastic elastomers (TPE), or polyimide (PI), etc. The elongation range of the fabric layer 180 is, for example, in the range of 10% to 800%, and the preferred elongation is 100-600%.

[0022] Please refer to Figures 4A and 4B. The fabric layer 180 includes a third opening O3, and a light guide structure 130 is disposed within the third opening O3. Specifically, the fabric layer 180 has a plurality of third openings O3, and a plurality of light guide structures 130 on the display device 100B may be located within the plurality of third openings O3 of the fabric layer 180. The ratio of the projected area of ​​the light guide structure 130 on the substrate 110 to the projected area of ​​the third opening O3 on the substrate 110 is, for example, 10% to 150%, preferably 60% to 120%. The ratio of the height of the fabric layer 180 along the third direction D3 to the height of the light guide structure 130 along the third direction D3 is, for example, 10% to 200%, preferably 50% to 80%. For example, if the height of the fabric layer 180 along the third direction D3 is 1 mm, then the height of the light guide structure 130 along the third direction D3 can be 0.5 mm to 0.8 mm. In addition, if the ratio of the height of the fabric layer 180 along the third direction D3 to the height of the light guide structure 130 along the third direction D3 is 100%-150%, then the height of the light guide structure 130 exceeds the height of the fabric layer 180, and the structure of the light guide structure 130 along the third direction D3 can protrude from the fabric layer 180.

[0023] The fabric layer 180 may or may not contact the light guide structure 130 depending on the force applied in different directions. For example, referring to Figures 4A and 4B, the fabric layer 180 is woven together by a first portion 180a distributed along a first direction D1 and a second portion 180b distributed along a second direction D2, or the weaving design in different directions may be made according to actual needs, but the present invention is not limited thereto. When the fabric layer 180 is stretched, for example, stretched in the first direction D1 or in the second direction D2, the width W1 of the first portion 180a or the width W2 of the second portion 180b of the fabric layer 180 (as shown in Figure 4A) will be reduced to width W1' or width W2' (as shown in Figure 4B), so that the fabric layer 180, which was originally in complete contact with the light guide structure 130, becomes such that only, for example, the first portion 180a or the second portion 180b of the fabric layer 180 is in contact with the light guide structure 130. For example, referring to Figures 4A to 4C, when the fabric layer 180 is stretched in the second direction D2, the width W2 of the second part 180b is reduced to W2', while the first part 180a is not reduced. This causes the light guide structure 130, which was originally in contact with the first part 180a and the second part 180b of the fabric layer 180, to become only in contact with the first part 180a. Therefore, the fabric layer 180 will exert uneven force on the light guide structure 130.

[0024] Since the light guide structure 130 is attached to the substrate 110, the sub-pixels in the pixel 123 of the display device are less likely to shift. That is, the sub-pixels in the pixel 123 do not move relative to the substrate 110 in the first direction D1 or in the second direction D2. Thus, the light guide structure 130 in the display device is less likely to be misaligned due to the uneven force generated by the fabric layer 180 on the light guide structure 130, resulting in a decrease in screen resolution. Therefore, the screen resolution of the display device can be greatly improved.

[0025] Referring to FIG4D, in some embodiments, the light guide structure 130 may also include a second opening O2 as shown in FIG2C, and the pixel 123 is disposed in the second opening O2. When the light guide structure 130 covers the pixel 123, the second opening O2 of the light guide structure 130 appropriately exposes the pixel 123, and at the same time, the pixel 123 is stably disposed in the second opening O2. Thus, when the substrate 110 is deformed by external force or the fabric layer 180 exerts uneven force on the light guide structure 130, since the light guide structure 130 is attached to the substrate 110 and the pixel 123 is stably disposed in the second opening O2, the sub-pixels in the pixel 123 in the display device are not easily displaced. That is, the sub-pixels in the pixel 123 move relative to the substrate 110 towards the first direction D1 or towards the second direction D2. Thus, the display device is not easily misaligned by external force, causing the screen resolution to decrease. Therefore, the screen resolution of the display device can be greatly improved.

[0026] In summary, in the display device of the embodiments disclosed herein, pixels are disposed on the display element layer, and a light guide structure is disposed on the display element layer. The display element layer includes a first opening, and the light guide structure is bonded to the substrate through the first opening. The substrate is a stretchable substrate. When the substrate deforms due to external force, the light guide structure is bonded to the substrate, making the display device less prone to screen resolution degradation due to external force. Thus, the screen resolution of the display device can be significantly improved. [Simplified Explanation of the Diagram]

[0006] FIG1 is a perspective view of a display device according to an embodiment of the present disclosure. FIG2A is a top view of the display device of FIG1. ​​FIG2B to FIG2D are cross-sectional views along I-I' of FIG2A. FIG2E is a top view of the display device of FIG1 according to an embodiment of the present disclosure. FIG2F is a cross-sectional view along I-I' of FIG2E. FIG3 is a perspective view of a display device according to an embodiment of the present disclosure. FIG4A and FIG4B are top views of the display device of FIG3. FIG4C to FIG4D are cross-sectional views along I-I' of FIG4B.

Claims

1. A display device, comprising: One substrate; A display element layer is disposed on the substrate; One pixel is disposed on the display element layer; A light guide structure is disposed on the display element layer, wherein the substrate is a stretchable substrate, the display element layer includes a first opening, the light guide structure is attached to the substrate through the first opening, the light guide structure further includes a second opening, and the pixel is disposed in the second opening.

2. The display device as claimed in claim 1, wherein the light guide structure further includes a surface layer disposed on a surface of the light guide structure.

3. A display device, comprising: One substrate; A display element layer is disposed on the substrate; Pixels are disposed on the display element layer; The display device also includes a light guide structure disposed on the display element layer, wherein the substrate is a stretchable substrate, and the display device further includes a first adhesive layer disposed between the display element layer and the substrate. The display element layer includes a first opening, and the light guide structure is attached to the first adhesive layer through the first opening. The light guide structure further includes a second opening, and the pixel is disposed in the second opening.

4. The display device as claimed in claim 3, wherein the light guide structure further includes a surface layer disposed on a surface of the light guide structure.

5. A display device, comprising: One substrate; A display element layer is disposed on the substrate; One pixel is disposed on the display element layer; A light guide structure is disposed on the display element layer; A fabric layer is disposed on the display element layer, including a third opening, and the light guide structure is disposed in the third opening. The substrate is a stretchable substrate. The display element layer includes a first opening, and the light guide structure is attached to the substrate through the first opening. The light guide structure also includes a second opening, and the pixel is disposed in the second opening.

6. The display device as claimed in claim 5, wherein the light guide structure further includes a surface layer disposed on a surface of the light guide structure.

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