Touch display device

Abstract

The present invention discloses a touch display device, comprising a substrate, a light-emitting unit, an insulating layer and a grid unit. The light-emitting unit is arranged on the substrate. The insulating layer is arranged on the light-emitting unit. The grid unit is arranged on the insulating layer. Each grid unit has a grid frame and a grid opening. The light-emitting unit is arranged in the grid opening. At least two of the grid openings have different areas.

Description

[0001] This case is a divisional application. The parent case is a Chinese invention patent application with application date of October 25, 2017 and application number 201711006049.8. Technical Field

[0002] The present invention relates to a touch display device, and in particular to a touch display device comprising a grid unit. Background Art

[0003] In recent years, touch display technology has developed significantly and there are many electronic products that integrate touch display functions, such as mobile phones, GPS navigation systems, tablet computers and laptops. These electronic products mainly integrate the original display function and touch function to achieve touch display. In traditional resistive touch technology or capacitive touch technology, the sensing electrode for detecting touch signals is usually made of indium tin oxide (ITO) to avoid interference with the display function. However, since indium tin oxide has a higher resistivity than conductive metal materials, the sensing electrode prepared using indium tin oxide may lead to problems such as higher overall resistance and lower reaction rate. Therefore, in the prior art, in order to increase the reaction rate, a metal grid interwoven by metal wires can be used to replace indium tin oxide. However, the use of a metal grid may block part of the display light, so that the display effect of the touch display device is affected by the metal grid. Summary of the invention

[0004] One of the main purposes of the present invention is to provide a touch display device. The light-emitting unit is arranged in a grid opening of a grid unit to reduce the influence of the grid unit on the display performance of the light-emitting unit. At least two of the plurality of grid openings have different areas.

[0005] One embodiment of the present invention provides a touch display device, including a substrate, a plurality of light-emitting units, an insulating layer, and a plurality of grid units. The plurality of light-emitting units are arranged on the substrate. The insulating layer is arranged on the plurality of light-emitting units. The plurality of grid units are arranged on the insulating layer. Each grid unit has a grid frame and a grid opening. The plurality of light-emitting units are arranged in the grid opening. At least two of the plurality of grid openings have different areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of a touch display device according to a first embodiment of the present invention;

[0007] Figure 2 Shown Figure 1 Sectional view along the section line A-A';

[0008] Figure 3 It is a schematic diagram of a touch display device according to a second embodiment of the present invention;

[0009] Figure 4 It is a schematic diagram of a touch display device according to a third embodiment of the present invention;

[0010] Figure 5 It is a schematic diagram of a touch display device according to a fourth embodiment of the present invention;

[0011] Figure 6 FIG. 4 is a schematic diagram of a grid unit according to a fourth embodiment of the present invention;

[0012] Figure 7 FIG. 5 is a schematic diagram of a touch display device according to a fifth embodiment of the present invention.

[0013] Description of reference numerals: 10-substrate; 20-light-emitting unit; 21-first light-emitting unit; 22-second light-emitting unit; 23-third light-emitting unit; 30-insulating layer; 40-grid unit; 40A-grid frame; 40B-grid opening; 40G-spacer; 40X-touch electrode; 41-first grid unit; 41A-first grid frame; 41B-first grid opening; 42-second grid unit; 42A-second grid frame; 42B-second grid opening; 50-bonding layer; 6 0-covering substrate; 101, 102, 103, 104, 105-touch display device; RG-projection area; RG1-first projection area; RG2-second projection area; CR1-first corner; CR2-second corner; DS-distance; E1-first end; E2-second end; L1-first straight line; L2-second straight line; S1-first arc edge; S2-second arc edge; W1-first width; W2-second width; W3-third width; Z-direction. DETAILED DESCRIPTION

[0014] Certain words are used throughout the specification and claims to refer to specific components. It should be understood by those skilled in the art that electronic equipment manufacturers may refer to the same components by different names. This case is not intended to distinguish between components that have the same function but different names. In the following specification and claims, the words "including" and "comprising" are open-ended words and should be interpreted as "including but not limited to..."

[0015] Please refer to Figure 1 and Figure 2 . Figure 1 FIG. 1 is a schematic diagram of a touch display device according to a first embodiment of the present invention. Figure 2 Shown Figure 1 Sectional view along the section line A-A'. Figure 1 and Figure 2As shown, this embodiment provides a touch display device 101, which includes a plurality of light-emitting units 20, an insulating layer 30, and a plurality of grid units 40. The plurality of light-emitting units 20 are disposed on a substrate 10. The insulating layer 30 is disposed on the plurality of light-emitting units 20. The plurality of grid units 40 are disposed on the insulating layer 30. Each grid unit 40 has a grid frame 40A and a grid opening 40B. In a top view (e.g., Figure 1 ), that is, in a direction perpendicular to the substrate 10, a plurality of light emitting units 20 are arranged in the grid opening 40B.

[0016] In some embodiments, the substrate 10 may include a glass substrate, a plastic substrate, a ceramic substrate, a metal foil or other suitable hard or soft substrates. The light-emitting unit 20 may include an organic light-emitting diode unit (OLED), an inorganic light-emitting diode unit (LED) (e.g., micro-LED, with a size ranging from 0.1 micron to 100 microns; or a mini-LED, with a size ranging from 100 microns to 300 microns), an organic and inorganic hybrid light-emitting unit (e.g., QD-LED, with a quantum well layer including quantum dot materials) or other suitable light-emitting structure types. Figure 1 The outline of the light-emitting unit 20 in the figure is the effective light-emitting area, wherein the effective light-emitting area is defined by the effective diode structure. The effective diode structure is a layered stack, and is a laminated structure of a cathode, a light-emitting layer, and an anode in sequence. In addition, the substrate 10 may include a plurality of thin film transistors, or a circuit suitable for driving the light-emitting component 20. The thin film transistors in the circuit as described above may include amorphous silicon thin film transistors (a-SiTFTs), polycrystalline silicon thin film transistors (poly-Si TFTs), oxide semiconductor thin film transistors (such as IGZO TFTs), or other thin film transistors. In some embodiments, the insulating layer 30 may be an encapsulation layer formed on the substrate 10 and covering the light-emitting unit 20, but is not limited thereto. In some embodiments, the insulating layer 30 may also include a planarization layer formed between the light-emitting unit 20 and the encapsulation layer covering the light-emitting unit 20. In other words, the insulating layer 30 may be a single-layer structure or a multi-layer structure. The material of the insulating layer 30 may include silicon oxide, silicon nitride, silicon oxynitride, metal oxide, polymer, resin, or other suitable organic and inorganic materials. In some embodiments, the mesh unit 40 may include a metal mesh, and the material of the metal mesh may include aluminum, copper, molybdenum, titanium, silver, a composite layer of the above materials, or an alloy of the above materials, but is not limited thereto. In some embodiments, the mesh unit 40 may also be made of a suitable conductive material such as a conductive oxide material.

[0017] like Figure 1 and Figure 2As shown, the grid frame 40A of the grid unit 40 can be connected to the grid frame 40A of at least one adjacent grid unit 40 to form a grid shape. In other words, the edge of the grid unit 40 (as shown by the dotted line) is set between two adjacent grid openings 40B, and the edge of the grid unit 40 is on the grid branch (on the electrode line connecting the grid shape). In some embodiments, the touch electrode 40X can be formed by at least one grid unit 40. In other words, the touch display device 101 may include at least one touch electrode 40X, and the touch electrode 40X is formed by at least one grid unit 40, but is not limited to this. The touch electrode 40X can be used for capacitive touch sensing operations, resistive touch sensing operations or other suitable touch sensing operations. In some embodiments, the grid unit 40 can be formed and used as a connecting portion between touch electrodes and a wiring connecting the touch electrodes and extending to the peripheral area, or other suitable parts in the touch sensing structure.

[0018] like Figure 1 and Figure 2 As shown, each grid opening 40B has a projection area RG in the direction Z perpendicular to the substrate 10, and the light-emitting unit 20 can be arranged in the projection area RG. In other words, the grid unit 40 does not overlap with the light-emitting unit 20 in the direction Z perpendicular to the substrate 10, thereby reducing the influence of the grid unit 40 on the display performance of the light-emitting unit 20, and the display quality of the touch display device 101 can be improved. The distance range between the light-emitting unit 20 and the corresponding grid frame 40A can be between 1 micron and 10 microns in the top view of the touch display device 101, so as to ensure that the light emitted by the light-emitting unit 20 in the direction Z will not be shielded by the grid unit 40. In some embodiments, each light-emitting unit 20 can be respectively arranged in one of the projection areas RG of the grid opening 40B. In other words, each projection area RG can be formed corresponding to only one light-emitting unit 20, but is not limited thereto. In some embodiments, at least one of the projection areas RG can be formed corresponding to a plurality of light-emitting units 20.

[0019] In addition, the light-emitting unit 20 may include a light-emitting unit 20 for emitting light of different colors. For example, the light-emitting unit 20 may include a first light-emitting unit 21, a second light-emitting unit 22, and a third light-emitting unit 23 for emitting red light, green light, and blue light, respectively, but not limited thereto. In some embodiments, at least two light-emitting units 20 have different areas, and the area is defined as the area within the outline of the light-emitting unit 20. For example, in order to achieve a specific mixed color light, the area of ​​the third light-emitting unit 23 may be smaller than the area of ​​the first light-emitting unit 21 and the area of ​​the second light-emitting unit 22, but not limited thereto. Similarly, at least two grid openings 40B have different areas. Specifically, in some embodiments, the touch electrode 40X may include a plurality of first grid units 41 and a plurality of second grid units 42. Each first grid unit 41 may have a first grid frame 41A and a first grid opening 41B, and each second grid unit 42 may have a second grid frame 42A and a second grid opening 42B. The first light-emitting unit 21 and the second light-emitting unit 22 may be respectively disposed in the first grid opening 41B, and the third light-emitting unit 23 may be disposed in the second grid opening 42B. In other words, the first light emitting unit 21 may be disposed in the first projection area RG1 of the first grid opening 41B, the second light emitting unit 22 may be disposed in the first projection area RG1 of another first grid opening 41B, and the third light emitting unit 23 may be disposed in the second projection area RG2 of the second grid opening 42B. When the area of ​​the third light emitting unit 23 is smaller than the area of ​​the first light emitting unit 21 and the area of ​​the second light emitting unit 22, the second grid opening 42B may be smaller than the first grid opening 41B, and the second projection area RG2 may be smaller than the first projection area RG1, but the present invention is not limited thereto. In some embodiments, the first light emitting unit 21 may be disposed in the first grid opening 41B, the second light emitting unit 22 may be disposed in the second grid opening 42B, and the third light emitting unit 23 may be disposed in the third grid opening, the area of ​​the third light emitting unit 23 is smaller than the area of ​​the second light emitting unit 22, the area of ​​the second light emitting unit 22 is smaller than the area of ​​the first light emitting unit 21, the third grid opening may be smaller than the second grid opening 42B, and the second grid opening 42B may be smaller than the first grid opening 41A. In some embodiments, the areas of the grid openings 40B may also be the same as each other in response to design requirements.

[0020] like Figure 1 and Figure 2As shown, the touch display device 101 may include a cover substrate 60 and an adhesive layer 50. The adhesive layer 50 may be disposed between the cover substrate 60 and the substrate 10 on which the light-emitting unit 20 and the grid unit 40 are disposed, so as to connect the substrate 10 and the cover substrate 60. Therefore, the grid unit 40 is disposed between the cover substrate 60 and the insulating layer 30. In some embodiments, the touch display device 101 may further include a polarizer and / or a quarter wave plate (not shown). The polarizer and / or the quarter wave plate are disposed between the cover substrate 60 and the light-emitting unit 20 or on the cover substrate 60 to reduce the influence of the ambient light reflected by the touch display device 101, but the invention is not limited thereto.

[0021] Other embodiments of the present invention will be described below. To simplify the description and highlight the differences between the embodiments or variations, the same reference numerals are used to mark the same components below, and repeated parts will not be described in detail.

[0022] Please refer to Figure 3 . Figure 3 FIG. 1 is a schematic diagram of a touch display device 102 according to a second embodiment of the present invention. Figure 3 As shown, in the touch display device 102, at least two light-emitting units 20 are disposed in one of the grid openings 40B. In other words, at least two light-emitting units 20 are disposed in a projection area RG of the grid opening 40B. For example, each projection area RG can be formed corresponding to two light-emitting units 20, but is not limited thereto. In some embodiments, more than two light-emitting units 40B can be disposed in the same grid opening 40B. In addition, the light-emitting units 20 disposed in the same projection area RG can be used to emit light of the same color, but is not limited thereto. For example, two first light-emitting units 21 can be disposed in the same first projection area RG1, two second light-emitting units 22 can be disposed in the same first projection area RG1, and two third light-emitting units 23 can be disposed in the same second projection area RG2.

[0023] Please refer to Figure 4 . Figure 4 FIG. 1 is a schematic diagram of a touch display device 103 according to a third embodiment of the present invention. Figure 4As shown, in the touch display device 103, at least two light-emitting units 20 are arranged in one of the grid openings 40B. In other words, at least two light-emitting units 20 are arranged in one of the projection areas RG of the grid opening 40B. In addition, the numbers of the light-emitting units 20 respectively arranged in the at least two projection areas RG are different from each other. For example, only one light-emitting unit 20 may be arranged in each second grid opening 40B, and two light-emitting units 20 may be arranged in each first grid opening 41B. In addition, the light-emitting units 20 arranged in the same projection area RG can be used to emit light of different colors. For example, a first light-emitting unit 21 and a third light-emitting unit 23 may be arranged in the same first projection area RG1, and a second light-emitting unit 22 and a third light-emitting unit 23 may be arranged in the same first projection area RG1, but it is not limited thereto.

[0024] Please refer to Figure 5 and Figure 6 . Figure 5 FIG. 1 is a schematic diagram of a touch display device 104 according to a fourth embodiment of the present invention. Figure 6 FIG. 1 is a schematic diagram of a grid unit of this embodiment. Figure 5 and Figure 6 As shown, in the touch display device 104, at least one grid frame 40A includes a first end E1 and a second end E2 opposite to the first end E1, and the interval 40G is the shortest distance between the first end E1 and the second end E2. Among them, the interval 40G can be used to separate two adjacent touch electrodes 40X, and the touch electrode 40X is composed of a grid unit 40, but not limited to this. Therefore, the first end E1 and the second end E2 can be electrically insulated from each other, but not limited to this. In some embodiments, one of the grid units 40 can be provided with only one interval 40G, and the first end E1 can still be electrically connected to the second end E2. In addition, the grid frame 40A can also include a first corner portion CR1, a second corner portion CR2, a first straight portion L1 and a second straight portion L2. The first straight portion L1 is arranged between the first end E1 and the first corner portion CR1. The second straight portion L2 is arranged between the second line end E2 and the second corner portion CR2. The shape of the first straight portion L1 and the second straight portion L2 is rectangular. At least a portion of the first end E1, the second end E2, the first corner portion CR1, and the second corner portion CR2 include an arc shape. The first corner portion CR1 is adjacent to the second corner portion CR2, and a gap 40G is provided between the first corner portion CR1 and the second corner portion CR2. The first straight portion L1 may have a first width W1 in a direction perpendicular to the extension of the first straight portion L1, and the second straight portion L2 may have a second width W2 in a direction perpendicular to the extension of the second straight portion L2. The first width W1 and the second width W2 may be less than or equal to a width of the gap 40G, for example Figure 6The third width W3 shown. In addition, the width of the gap 40G can be less than the distance DS between the first corner portion CR1 and the second corner portion CR2, thereby reducing the visual impact of the gap 40G. The distance DS is defined as the minimum distance between the first corner portion CR1 and the second corner portion CR2. In some embodiments, the first end E1 can have a first arcuate edge S1, and the second end E2 has a second arcuate edge S2, but is not limited thereto.

[0025] Please refer to Figure 7 . Figure 7 FIG. 1 is a schematic diagram of a touch display device 105 according to a fifth embodiment of the present invention. Figure 7 As shown, in Figure 7 In the display device 105 , one of the grid units 40 may be provided with only one gap 40G, and the first end E1 is still electrically connected to the second end E2 . Figure 7 The mesh unit 40 shown may be a dummy mesh unit in the touch sensing structure, and the formation of the gap 40G may be used to improve the visual uniformity of the mesh unit 40 , but is not limited thereto.

[0026] In summary, in the touch display device provided by the present invention, the light emitting unit is arranged in the grid opening in the grid unit to prevent the light emitted by the light emitting unit in the direction perpendicular to the substrate from being shielded by the grid unit. The light intensity of the touch display device can be increased, and the display quality of the touch display device can also be improved.

[0027] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A touch display device, characterized in that: include: a substrate; A light emitting unit is disposed on the substrate; an insulating layer, disposed on the light-emitting unit; A grid unit is disposed on the insulating layer, and the grid unit has a grid frame and a grid opening, wherein the grid frame has a first end and a second end opposite to the first end; as well as a first spacer disposed between the first end and the second end, The light emitting unit is disposed in the grid opening in a direction perpendicular to the surface of the substrate, and the first end is electrically connected to the second end. The grid framework includes: A first corner portion and a second corner portion adjacent to the first corner portion, wherein the first interval is disposed between the first corner portion and the second corner portion; a first straight portion, the first straight portion being disposed between the first corner portion and the first end and having a first extending direction; and A second straight portion is disposed between the second corner portion and the second end and has a second extension direction parallel to the first extension direction, and the first interval is disposed between the first straight portion and the second straight portion in the first extension direction.

2. The touch display device according to claim 1, characterized in that: The first end has a first arc-shaped edge, and the second end has a second arc-shaped edge.

3. The touch display device according to claim 1, characterized in that: The first straight portion has a first width perpendicular to the first extending direction, and the first interval has a second width parallel to the extending direction, wherein the first width is smaller than the second width.

4. The touch display device according to claim 1, characterized in that: The light emitting unit includes a first light emitting unit and a second light emitting unit. The first light emitting unit emits blue light, and the second light emitting unit emits green light.

5. The touch display device according to claim 1, characterized in that: The light emitting unit includes a first light emitting unit and a second light emitting unit. The first light emitting unit emits red light, and the second light emitting unit emits green light.

6. The touch display device according to claim 1, characterized in that: The light emitting unit includes a first light emitting unit and a second light emitting unit, and the area of ​​the first light emitting unit is different from the area of ​​the second light emitting unit.

7. The touch display device according to claim 1, characterized in that: Another grid unit is included, and the other grid unit has another grid opening, and the grid opening is smaller than or larger than the other grid opening.

8. The touch display device according to claim 1, characterized in that: It includes another grid unit, which includes another grid frame. The other grid frame includes a third end and a fourth end relative to the third end. A second interval is set between the third end and the fourth end, and the third end is electrically insulated from the fourth end.

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