Touch panel and display device

Abstract

The invention relates to a touch panel and display equipment, the touch panel comprises a substrate and a plurality of annular touch electrodes, the touch electrodes are in one-to-one correspondence with pixel units, and first projections of the touch electrodes on the substrate surround second projections of the corresponding pixel units on the substrate. The touch electrodes are designed to be of the annular structure, so that the boundary of different electrodes of the touch electrodes is free of metal deficiency or complete deficiency, and the problem of poor optics is solved.

Description

Technical Field

[0001] The present application relates to the technical field of display screen design, and in particular to a touch panel and a display device. Background Art

[0002] With the introduction of capacitive touch display devices with excellent touch functions on the market, electronic products are becoming more and more popular. Common touch display devices use metal mesh, which has the characteristics of high touch accuracy and high touch sensitivity. However, the current design will produce poor optical problems under certain light conditions. Summary of the invention

[0003] Based on this, it is necessary to provide a touch panel and a display device that can improve optical defects in response to the above technical problems.

[0004] In a first aspect, the present application provides a touch panel, which includes a substrate and a plurality of annular touch electrodes, the touch electrodes corresponding to pixel units one by one, and a first projection of the touch electrode on the substrate surrounds a second projection of the corresponding pixel unit on the substrate.

[0005] In one embodiment, the distances from each side of the first projection to each side of the second projection are equal.

[0006] In one embodiment, a plurality of touch electrodes located at non-signal boundary positions surround pixel units of different colors, and each side of a first projection of each touch electrode has the same distance to each side of a second projection of a corresponding pixel unit;

[0007] The pixel units of different colors include red pixel units, green pixel units and blue pixel units.

[0008] In one embodiment, the touch electrodes include an annular driving touch electrode and an annular sensing touch electrode;

[0009] At the signal boundary position, the annular driving touch electrode and the annular sensing touch electrode are separately arranged;

[0010] Preferably, at the non-signal boundary position, the annular driving touch electrodes are connected and arranged, and / or, at the non-signal boundary position, the annular sensing touch electrodes are connected and arranged.

[0011] In one embodiment, the above-mentioned annular driving touch electrode and the annular sensing touch electrode are closed ring structures, wherein the edge of the annular driving touch electrode at the signal boundary position and the edge of the annular sensing touch electrode at the signal boundary position are separated by a preset distance; preferably, the preset distance is 5-10 microns.

[0012] In one embodiment, the annular driving touch electrode at the signal boundary position is smaller than the annular driving touch electrode at the non-signal boundary position;

[0013] And / or, the annular sensing touch electrode at the signal boundary position is smaller than the annular sensing touch electrode at the non-signal boundary position.

[0014] In one embodiment, the distances from the edges of the first projection to the edges of the second projection of the annular driving touch electrode at the signal boundary position are smaller than the distances from the edges of the first projection to the edges of the second projection of the annular driving touch electrode at the non-signal boundary position;

[0015] And / or, the distance from each side of the first projection to each side of the second projection of the annular sensing touch electrode at the signal boundary position is smaller than the distance from each side of the first projection to each side of the second projection of the annular sensing touch electrode at the non-signal boundary position.

[0016] In one embodiment, a connection structure is provided between the annular driving touch control electrode at the signal boundary position and the annular driving touch control electrode at the non-signal boundary position;

[0017] And / or, a connection structure is provided between the annular sensing touch electrode at the signal boundary position and the annular sensing touch electrode at the non-signal boundary position.

[0018] In one embodiment, the touch electrodes include an annular driving touch electrode and an annular sensing touch electrode;

[0019] At the signal boundary position, the annular driving touch electrode and the annular sensing touch electrode are arranged in close contact with each other, the edge of the annular driving touch electrode that is in close contact with the annular sensing touch electrode is set as a break, and / or the edge of the annular sensing touch electrode that is in close contact with the annular driving touch electrode is set as a break.

[0020] In a second aspect, the present application further provides a display device, which includes a touch panel as in the first aspect.

[0021] The above touch panel and display device, the touch panel includes a substrate and a plurality of annular touch electrodes, the touch electrodes correspond to the pixel units one by one, and the first projection of the touch electrode on the substrate surrounds the second projection of the corresponding pixel unit on the substrate. The present application improves the problem of poor optics by designing an annular structure for the touch electrode so that there is no metal missing or no complete missing effect at the boundaries between different electrodes of the touch electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is one of the metal ring fracture design drawings in the related art;

[0023] Figure 2 This is the second design diagram of the metal ring fracture in the related art;

[0024] Figure 3 is a schematic diagram of a touch electrode in one embodiment;

[0025] Figure 4 is a schematic diagram of a connection structure in one embodiment;

[0026] Figure 5 A schematic diagram of the touch electrode bonding arrangement in one embodiment;

[0027] Figure 6 FIG. 1 is a schematic diagram of a display device in one embodiment.

[0028] Reference numerals:

[0029] Touch panel 1, touch electrode 11, pixel unit 2, driving touch electrode 110, sensing touch electrode 111, break 112, connection structure 12, display device 01. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] First of all, before specifically introducing the technical solution of the embodiments of the present application, the technical background based on the embodiments of the present application is introduced.

[0032] With the rapid development of the mobile phone industry, mobile phone users have higher requirements for mobile phones, including optics and touch. In conventional touch design, there are three types of signals in the AA area: TX (driving touch electrode), RX (sensing touch electrode), and dummy (idle signal). The signals are distinguished by interrupting the three types of signals. In the process of implementing the present invention, the inventor found that the following problems exist in the related art, see Figure 1-Figure 2 The design of the metal fracture has relatively regular changes, which makes the pattern visible, resulting in poor optics. High-end mobile phones cannot accept this optical difference, resulting in returns and display panel revisions.

[0033] Based on this, the present application provides a touch panel and a display device, aiming to solve the above technical problems.

[0034] In an exemplary embodiment, the present application provides a touch panel, which can be found in Figure 3-Figure 5The touch panel 1 includes a substrate and a plurality of annular touch electrodes 11, the touch electrodes 11 correspond to the pixel units 2 one by one, and a first projection of the touch electrode 11 on the substrate surrounds a second projection of the corresponding pixel unit 2 on the substrate. Specifically, the first projection is an orthographic projection of the touch electrode on the substrate, and the second projection is an orthographic projection of the pixel unit 2 on the substrate.

[0035] Among them, the annular touch electrode 11 can be made of metal ring material, and the size of the annular touch electrode 11 can be adjusted. The touch electrode 11 can be any one of a driving touch electrode or a sensing touch electrode. The touch electrode 11 is generally arranged on the upper surface of TFE (Thin Film Encapsulation). The pixel unit is located on the display substrate. A pixel of the display substrate is composed of multiple pixel units. In each pixel, multiple sub-pixels emit light of different colors respectively, so that the pixel can adjust the color of the emitted light as needed, so that the display substrate can realize color image display. The light-emitting structure in the sub-pixel is a light-emitting device. The light-emitting device of the display substrate is classified into three colors, red (R), green (G), and blue (B), for example. The wavelengths of red (R) light and green (G) light are greater than the wavelength of blue (B) light. Blue (B) light is the shortest wavelength light, and red (R) light and green (G) light are non-shortest wavelength light.

[0036] The orthographic projection position of the ring-shaped touch electrode of the present application on the substrate is directly opposite to the middle gap of the RGB pixel unit. Each touch electrode corresponds to a pixel unit, and the size of the touch electrode can be changed according to the size of the pixel unit. Each touch electrode can be separated or connected, that is, the ring-shaped touch electrode can be a completely wrapped or partially wrapped design.

[0037] The above touch panel includes a substrate and a plurality of annular touch electrodes, the touch electrodes correspond to the pixel units one by one, and the first projection of the touch electrode on the substrate surrounds the second projection of the corresponding pixel unit on the substrate. The present application improves the problem of poor optics by designing an annular structure for the touch electrode so that there is no metal missing or no complete missing effect at the boundaries between different electrodes of the touch electrode.

[0038] In an exemplary embodiment, based on the above embodiment, the distances from each edge of the first projection to each edge of the second projection in the embodiment of the present application are equal.

[0039] like Figure 3 As shown, the embodiment of the present application takes each pixel unit as the center and draws a TP-mesh ring structure around it at equal distances in the X / Y direction, forming a separate ring structure for each pixel unit, and the distances from each side of the first projection to each side of the second projection are equal. For example, the distance from the middle of two pixel units to the ring structure is 1 single pixel equidistant.

[0040] In the embodiment of the present application, the first projection of the touch electrode to the second projection of the pixel unit is designed to be equidistant, thereby ensuring that the distance between the ring structure and the corresponding pixel unit is consistent, thereby achieving the purpose of improving optical defects.

[0041] In an exemplary embodiment, a plurality of touch electrodes located at non-signal boundary positions surround pixel units of different colors, and each side of a first projection of each touch electrode is at the same distance from each side of a second projection of a corresponding pixel unit; wherein the pixel units of different colors include a red pixel unit, a green pixel unit, and a blue pixel unit.

[0042] Among them, non-signal boundary positions refer to other positions in the touch panel except for the areas specifically used to distinguish different types of touch signals (such as drive signals and sensing signals). At these positions, the main function of the touch electrodes is to achieve stable touch signal transmission and uniform electric field distribution to ensure good touch performance and optical effects.

[0043] In an embodiment of the present application, the touch panel includes a plurality of annular touch electrodes, which correspond to pixel units one by one. At the non-signal boundary position, the plurality of touch electrodes surround the red pixel unit, the green pixel unit, and the blue pixel unit, respectively. Moreover, the distances from each side of the first projection of each touch electrode on the substrate to each side of the second projection of the corresponding pixel unit are the same. For example, in the X direction and the Y direction, the distances from the touch electrode to the edge of the pixel unit are kept consistent, such as 5 microns. This equidistant surrounding design ensures that the touch electrodes around each pixel unit are evenly distributed, avoiding uneven electric fields or optical problems caused by distance differences.

[0044] In the embodiment of the present application, since the distances of the touch electrodes around the pixel units of different colors are the same, the light is affected more uniformly when passing through the area between the touch electrodes and the pixel units. Whether it is the light emitted by the red, green or blue pixel units, the refraction and reflection conditions when passing through the touch electrode area are similar, thereby improving the optical uniformity of the entire display area. When displaying pure color images or gradient color images, it can effectively reduce color deviation or brightness unevenness caused by optical differences, making the image display clearer and more natural.

[0045] In an exemplary embodiment, based on the above embodiment, see Figure 3 The touch electrode 11 of the embodiment of the present application includes a ring-shaped driving touch electrode 110 and a ring-shaped sensing touch electrode 111 .

[0046] Wherein, at the signal boundary position, the annular driving touch electrode 110 and the annular sensing touch electrode 111 are separately arranged.

[0047] The signal demarcation position refers to a specific area in the touch panel used to distinguish different types of touch signals. At this position, the layout and structure of the touch electrodes need to be specially designed to clearly divide the signals generated or received by the driving touch electrodes and the sensing touch electrodes, ensuring that the touch chip can accurately identify and process the signal changes generated by the touch operation.

[0048] At the signal boundary position, the ring corresponding to the driving touch electrode 110 and the ring corresponding to the sensing touch electrode 111 are separated. Specifically, a certain gap is maintained between the two, for example, the gap width can be between 5-10 microns. This separation design breaks the traditional close fitting method, so that in the signal boundary area, the electric field distribution of the driving touch electrode and the sensing touch electrode is relatively independent, which is conducive to forming a clear signal boundary in this area, and is convenient for accurately distinguishing different types of signals, such as driving signals and sensing signals.

[0049] The embodiment of the present application changes the traditional design of closely fitting the driving touch electrode and the sensing touch electrode, and separates the driving touch electrode and the sensing touch electrode with a certain gap. The two driving touch electrodes can be designed by fitting two ring edges together, or connected together with conductive materials.

[0050] In the embodiment of the present application, the separation setting can improve the display screen to produce less optical defects under specific light.

[0051] In an exemplary embodiment, based on the above embodiment, please continue to refer to Figure 3 At the non-signal boundary position, the annular driving touch electrodes 110 are connected and arranged, and / or, at the non-signal boundary position, the annular sensing touch electrodes 111 are connected and arranged. That is, at the non-signal boundary position, two adjacent annular driving touch electrodes 110 are connected, and two adjacent annular sensing touch electrodes 111 are connected.

[0052] At the non-signal boundary position, the driving touch electrode 110 is connected to the sensing touch electrode 111 through a specific connection structure. The connection structure can be made of conductive materials such as a metal bridge and conductive glue. For example, the width of the metal bridge can be designed to be between 3 and 6 microns, and its material can be a metal with low resistivity (such as copper, silver, etc.).

[0053] In an exemplary embodiment, based on the above embodiment, the annular driving touch electrode 110 and the annular sensing touch electrode 111 are both closed annular structures.

[0054] The closed ring structure may refer to a fully enclosed metal ring of the touch electrode 11, without any metal break, completely surrounding the pixel unit 2. The edge of the ring-shaped driving touch electrode at the signal boundary position and the ring-shaped sensing touch electrode at the signal boundary position may adopt a complete ring structure or a break design.

[0055] In this embodiment, the ring structure is complete, and the edge of the ring-shaped driving touch electrode at the signal boundary position and the edge of the ring-shaped sensing touch electrode at the signal boundary position can be separated by a preset distance. Preferably, the preset distance is 5-10 microns, specifically, 5, 6, 7, 8, 9, 10 microns.

[0056] In the embodiment of the present application, by changing the size of the ring-shaped structure of the touch electrode, or reducing the ring-shaped structure so that the edge of the ring-shaped driving touch electrode at the signal boundary position is separated from the edge of the ring-shaped sensing touch electrode at the signal boundary position by a preset distance, the original metal bonding position is separated, thereby forming different signals for easy distinction.

[0057] In an exemplary embodiment, based on the above embodiment, the annular driving touch electrode 110 at the signal boundary position of the embodiment of the present application is smaller than the annular driving touch electrode 110 at the non-signal boundary position. And / or, the annular sensing touch electrode 111 at the signal boundary position is smaller than the annular sensing touch electrode 111 at the non-signal boundary position.

[0058] In the embodiment of the present application, based on the above embodiment, the annular driving touch electrode and the annular sensing touch electrode are separately arranged. For the design of the driving touch electrode at the signal boundary position and the annular driving touch electrode at the non-signal boundary position in the embodiment of the present application, the size of the driving touch electrode at the signal boundary position is set to be smaller than the size of the annular driving touch electrode at the non-signal boundary position.

[0059] The design of the annular sensing touch electrode at the signal boundary position and the annular sensing touch electrode at the non-signal boundary position in the embodiment of the present application can be: the annular sensing touch electrode at the signal boundary position is smaller than the annular sensing touch electrode at the non-signal boundary position.

[0060] In the embodiment of the present application, the rings at the signal boundary position and the non-signal boundary position are designed, and the size of the touch electrode ring structure is changed by design. The ring structure is reduced so that the original metal bonding position becomes a separated state, thereby forming different signals for easy distinction.

[0061] In an exemplary embodiment, the distance from each edge of the first projection of the annular driving touch electrode at the signal boundary position to each edge of the second projection is smaller than the distance from each edge of the first projection of the annular driving touch electrode at the non-signal boundary position to each edge of the second projection.

[0062] And / or, the distance from each side of the first projection to each side of the second projection of the annular sensing touch electrode at the signal boundary position is smaller than the distance from each side of the first projection to each side of the second projection of the annular sensing touch electrode at the non-signal boundary position.

[0063] In an embodiment of the present application, based on the setting method of setting the distances from each edge of the first projection to each edge of the second projection to be equal in the above embodiment, for the annular driving touch electrode at the signal boundary position and the non-signal boundary point position, the distances from each edge of the first projection of the annular driving touch electrode at the signal boundary position to each edge of the second projection can be set to be smaller than the distances from each edge of the first projection of the annular driving touch electrode at the non-signal boundary position to each edge of the second projection.

[0064] In other embodiments, further, the distance from each edge of the first projection of the annular driving touch electrode at the signal boundary position to each edge of the second projection can also be set to be greater than the distance from each edge of the first projection of the annular driving touch electrode at the non-signal boundary position to each edge of the second projection.

[0065] In other embodiments, similarly, for the annular sensing touch electrode at the signal boundary position and the non-signal boundary point position, the distance from each side of the first projection of the annular sensing touch electrode at the signal boundary position to each side of the second projection can be set to be smaller than the distance from each side of the first projection of the annular sensing touch electrode at the non-signal boundary position to each side of the second projection. Further, the distance from each side of the first projection of the annular sensing touch electrode at the signal boundary position to each side of the second projection can also be set to be larger than the distance from each side of the first projection of the annular sensing touch electrode at the non-signal boundary position to each side of the second projection.

[0066] In the embodiment of the present application, the distance between the ring structure of the touch electrode and the corresponding pixel unit is consistent, thereby improving the problem of poor optics. For the boundary position, the distances from each side of the first projection to each side of the second projection are scaled proportionally at the same time. By changing the size of the ring, the spacing space can be widened to form different signals.

[0067] In an exemplary embodiment, based on the above embodiment, see Figure 4 In the embodiment of the present application, a connection structure 12 may be provided between the annular driving touch electrode 110 at the signal boundary position and the annular driving touch electrode 110 at the non-signal boundary position. In addition, a connection structure may also be provided between the annular sensing touch electrode 111 at the signal boundary position and the annular sensing touch electrode 111 at the non-signal boundary position.

[0068] The connection structure may be made of conductive materials such as metal blocks.

[0069] In the embodiment of the present application, since the annular structures corresponding to the same type of signals need to be connected, but since one of the annular structures may need to be reduced at the boundary position, resulting in a disconnection at the middle connection position, a connection structure can be set to ensure that the two annular structures are conductive. In the embodiment of the present application, a connection structure can be set between the annular driving touch electrode at the signal boundary position and the annular driving touch electrode at the non-signal boundary position to facilitate conductivity and avoid the problem of signal transmission failure.

[0070] In an exemplary embodiment, based on the above embodiments, see Figure 5 The touch electrode of the embodiment of the present application includes an annular driving touch electrode and an annular sensing touch electrode. At the signal boundary position, the annular driving touch electrode 110 and the annular sensing touch electrode 111 are arranged in contact with each other, and the edge of the annular driving touch electrode 110 that is in contact with the annular sensing touch electrode 111 is set as a break 112, and / or the edge of the annular sensing touch electrode 111 that is in contact with the annular driving touch electrode 110 is set as a break 112.

[0071] In the embodiment of the present application, a break is provided at the edge where the driving touch electrode 110 is attached to the sensing touch electrode 111 and / or at the edge where the sensing touch electrode 111 is attached to the driving touch electrode 110. The width of the break can be set according to specific design requirements, for example, between 1-3 microns. The shape of the break can be linear, arc-shaped, etc., to adapt to different pixel unit layouts and signal transmission requirements. By providing a break, the traditional fully attached electrode structure is changed, and a state of metal missing or incomplete connection is formed in a specific area.

[0072] In the embodiment of the present application, in addition to the above-mentioned embodiment of reducing or expanding the ring structure, the embodiment of the present application can also cut off the connection of the ring structure so that the size of the pixel wrapped by the touch electrode remains unchanged, forming a break, but at the same time retaining the ring structure of the touch electrode corresponding to another adjacent pixel, which can also solve the visibility problem caused by the lack of metal. The setting position of the break can be the edge where the driving touch electrode fits the sensing touch electrode, or the edge where the sensing touch electrode fits the driving touch electrode.

[0073] In an exemplary embodiment, see Figure 6 The present application also provides a display device 01, which includes a touch panel 1.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A touch panel, characterized in that: The touch panel includes a substrate and a plurality of annular touch electrodes, wherein the touch electrodes correspond to pixel units one by one, and a first projection of the touch electrode on the substrate surrounds a second projection of the corresponding pixel unit on the substrate.

2. The touch panel according to claim 1, characterized in that: The distances from each side of the first projection to each side of the second projection are equal.

3. The touch panel according to claim 2, characterized in that: A plurality of touch electrodes located at non-signal boundary positions surround pixel units of different colors, and each side of a first projection of each touch electrode has the same distance to each side of a second projection of a corresponding pixel unit; Wherein, the pixel units of different colors include red pixel units, green pixel units and blue pixel units.

4. The touch panel according to claim 2, characterized in that: The touch electrodes include an annular driving touch electrode and an annular sensing touch electrode; At the signal boundary position, the annular driving touch electrode and the annular sensing touch electrode are separately arranged; Preferably, at a non-signal boundary position, the annular driving touch electrodes are connected and arranged, and / or, at a non-signal boundary position, the annular sensing touch electrodes are connected and arranged.

5. The touch panel according to claim 4, characterized in that: The annular driving touch electrode and the annular sensing touch electrode are a closed annular structure, wherein the edge of the annular driving touch electrode at the signal boundary position is spaced a preset distance from the edge of the annular sensing touch electrode at the signal boundary position; Preferably, the preset distance is 5-10 microns.

6. The touch panel according to claim 5, characterized in that: The annular driving touch control electrode at the signal boundary position is smaller than the annular driving touch control electrode at the non-signal boundary position; And / or, the annular sensing touch electrode at the signal boundary position is smaller than the annular sensing touch electrode at the non-signal boundary position.

7. The touch panel according to claim 5, characterized in that: The distances from the edges of the first projection of the annular driving touch electrode at the signal boundary position to the edges of the second projection are smaller than the distances from the edges of the first projection of the annular driving touch electrode at the non-signal boundary position to the edges of the second projection; And / or, the distance from each side of the first projection of the annular sensing touch electrode at the signal boundary position to each side of the second projection is smaller than the distance from each side of the first projection of the annular sensing touch electrode at the non-signal boundary position to each side of the second projection.

8. The touch panel according to claim 7, characterized in that: A connection structure is provided between the annular driving touch control electrode at the signal boundary position and the annular driving touch control electrode at the non-signal boundary position; And / or, a connection structure is provided between the annular sensing touch electrode at the signal boundary position and the annular sensing touch electrode at the non-signal boundary position.

9. The touch panel according to claim 2, characterized in that: The touch electrodes include an annular driving touch electrode and an annular sensing touch electrode; At the signal boundary position, the annular driving touch electrode is arranged in close contact with the annular sensing touch electrode, the edge of the annular driving touch electrode that is in close contact with the annular sensing touch electrode is set as a break, and / or the edge of the annular sensing touch electrode that is in close contact with the annular driving touch electrode is set as a break.

10. A display device, characterized in that: The display device comprises the touch panel as claimed in any one of claims 1 to 9.

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