Touch module and touch display device

Abstract

The present invention provides a touch module, comprising: a plurality of electrode blocks arranged in an electrode block array including a plurality of rows and a plurality of columns; an insulating layer covering the plurality of electrode blocks, wherein a plurality of through holes are provided in the region corresponding to each electrode block on the insulating layer; a plurality of first connecting wires and a plurality of second connecting wires, wherein the plurality of first connecting wires and a plurality of second connecting wires are arranged on a surface of the insulating layer away from the plurality of electrode blocks and are electrically connected to a driver; each column comprises n electrode blocks, wherein in each column, the distance between the electrode blocks and the driver gradually increases from the 1st to the nth electrode blocks, wherein the 1st to the m-1th electrode blocks in each column are electrically connected to a second connecting wire respectively, the mth to the nth electrode blocks are electrically connected to a first connecting wire respectively, the mth electrode block is electrically connected to a first connecting wire via a first number of through holes, and the m+1th to the nth electrode blocks are electrically connected to a first connecting wire via a second number of through holes respectively. The present invention also provides a touch display device.

Description

Technical Field

[0001] The present invention relates to the field of touch display technology, and in particular to a touch module and a touch display device using the touch module. Background Art

[0002] Existing electronic devices usually have screen display functions and touch functions to facilitate human-computer interaction. In the above-mentioned electronic devices, the screen display function of the electronic device often relies on the display panel, and the touch function often relies on the touch panel. Traditional touch panels include multiple touch electrodes and a driver electrically connected to each touch electrode through wiring. Since the distances between each touch electrode and the driver are different, the wiring lengths between each touch electrode and the driver are different. Wirings of different lengths have different loads. If the wiring loads between adjacent touch electrodes differ greatly, it is easy to affect the image displayed on the display panel, for example, horizontal stripes appear when the display panel displays the image, resulting in a decrease in the image display quality. Summary of the Invention

[0003] One aspect of the present invention provides a touch module applied to a touch display device, wherein the touch display device includes a driver; the touch module includes:

[0004] A plurality of electrode blocks are arranged in an electrode block array including a plurality of rows and a plurality of columns, wherein the driver is located at one end of the column direction and is spaced apart from the plurality of electrode blocks;

[0005] an insulating layer covering the plurality of electrode blocks, wherein a plurality of through holes are formed in a region of the insulating layer corresponding to each electrode block; and

[0006] a plurality of first connecting lines and a plurality of second connecting lines, wherein the plurality of first connecting lines and the plurality of second connecting lines are both disposed on a surface of the insulating layer away from the plurality of electrode blocks and electrically connected to the driver;

[0007] Each column includes n electrode blocks, and in each column, the distance between each electrode block and the driver gradually increases from the 1st to the nth electrode block. The 1st to m-1th electrode blocks in each column are respectively electrically connected to a second connecting line, and the mth to nth electrode blocks are respectively connected to a first connecting line. The mth electrode block is electrically connected to a first connecting line through a first number of through holes, and the m+1th to nth electrode blocks are respectively electrically connected to a first connecting line through a second number of through holes, wherein the first number is less than the second number, 1<m<n, and m and n are integers.

[0008] Another embodiment of the present invention provides a touch display device, including:

[0009] A touch module, wherein the touch module is the touch module described above; and

[0010] A driver is configured to output a touch driving signal to the plurality of electrode blocks.

[0011] A touch module provided by an embodiment of the present invention includes an electrode block array composed of multiple electrode blocks, the electrode block array including multiple columns. In each column, the 1st to m-1th electrode blocks are respectively electrically connected to a second connection line, and the mth to nth electrode blocks are respectively connected to a first connection line. The mth electrode block is electrically connected to a first connection line via a first number of through-holes, and the m+1th to nth electrode blocks are respectively electrically connected to a first connection line via a second number of through-holes. By setting the first number to be smaller than the second number, it is beneficial to reduce the resistance difference between the first connection line electrically connected to the mth electrode block and the second connection line electrically connected to the m-1th electrode block without changing the position of the mth electrode block and the driver and without adding additional wiring, thereby facilitating improved image display quality of a touch display device used in the touch module. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the module structure of the touch display device provided by an embodiment of the present invention.

[0013] Figure 2 for Figure 1 Schematic diagram of the planar structure of the touch module and driver.

[0014] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle touch module along III-III.

[0015] Description of main component symbols

[0016]

[0017]

[0018] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0019] See also Figure 1 The touch display device 10 provided in this embodiment can be a consumer electronic product such as a mobile phone or computer, or a touch display screen used in other smart devices. The touch display device 10 includes a touch module 20 and a driver 30 electrically connected to the touch module 20. The touch module 20 is configured to detect a user's touch operation under the control of the driver 30.

[0020] In this embodiment, the touch module 20 is an embedded touch module. Figure 2The touch module 20 includes a substrate 26 and a plurality of electrode blocks 21 disposed on the substrate 26. Each electrode block 21 is made of a transparent conductive material. In this embodiment, each electrode block 21 is a common electrode block and is time-shared as a display electrode and a touch electrode. Figure 2 , multiple electrode blocks 21 are arranged into an electrode block array including multiple rows and multiple columns. In this embodiment, the electrode blocks arranged along the X direction are defined as columns, and the electrode blocks arranged perpendicular to the X direction are defined as rows. In this embodiment, each column 22 includes multiple electrode blocks 21, and the number of electrode blocks 21 included in each column 22 is equal. Figure 2 As shown in FIG, the rows 22 of the touch module 20 are arranged in parallel and at equal intervals.

[0021] Please also refer to Figure 3 The touch module 20 further includes an insulating layer 23 ( Figure 2 (not shown), the insulating layer 23 covers the above-mentioned multiple electrode blocks 21, and a plurality of through holes 231 are opened on the insulating layer 23 in the area corresponding to each electrode block 21. That is, each electrode block 21 corresponds to an area of ​​the insulating layer 23, and the area of ​​the insulating layer 23 corresponding to the electrode block 21 is opened with a plurality of through holes 231, wherein the area of ​​the insulating layer 23 corresponding to each electrode block 21 refers to: the area where the orthographic projection of each electrode block 21 on the insulating layer 23 is located. For example Figure 3 The area on the insulating layer 23 corresponding to the middle electrode block 21 is the area 232 .

[0022] Please continue to read Figure 2 and Figure 3 The touch module 20 further includes a plurality of first connecting lines 24 and a plurality of second connecting lines 25. The plurality of first connecting lines 24 and the plurality of second connecting lines 25 are disposed on a surface of the insulating layer 23 away from the plurality of electrode blocks 21. Each first connecting line 24 and each second connecting line 25 is used to electrically connect to an electrode block 21 through at least one through-hole 231. In other words, each electrode block 21 is electrically connected to a first connecting line 24 or a second connecting line 25.

[0023] Please refer to Figure 2 The driver 30 is disposed on one side of the plurality of electrode blocks 21 in the column direction (X direction). The driver 30 is electrically connected to each first connection line 24 and each second connection line 25 to output a touch driving signal to each electrode block 21 through the plurality of first connection lines 24 and the plurality of second connection lines 25, and to receive a touch sensing signal transmitted back from each electrode block 21, so that the touch module 20 can detect a user's touch operation.

[0024] Please continue reading Figure 2Each column 22 includes n electrode blocks 21, from the 1st to the nth. In each column 22, the distance between each electrode block 21 and the driver 30 gradually increases from the 1st to the nth electrode block 21. That is, in each column 22, the 1st electrode block 21 is closest to the driver 30, and the nth electrode block 21 is farthest from the driver 30. In each column 22, the 1st to the m-1th electrode blocks 21 are each electrically connected to a second connection line 25, and the mth to the nth electrode blocks 21 are each connected to a first connection line 24. Where 1<m<n, and m and n are integers.

[0025] In one embodiment, in each row 22 , two-thirds of the electrode blocks 21 are electrically connected to a first connection line 24 , and one-third of the electrode blocks 21 are electrically connected to a second connection line 25 , that is, m−1=n / 3.

[0026] The touch display device 10 includes multiple electrode blocks 21, and each electrode block 21 is electrically connected to the driver 30 via a connecting wire (the aforementioned first connecting wire 24 or second connecting wire 25). When the touch display device 10 includes a large number of electrode blocks 21, after all the electrode blocks 21 are arranged in an array, the farther the electrode blocks 21 are from the driver 30, the longer the connecting wire between them and the driver 30. Longer connecting wires increase their resistance, resulting in greater signal loss in the signal output by the driver 30 along these connecting wires. Such significant signal loss can easily affect the image quality displayed by the touch display device 10.

[0027] In order to alleviate the above-mentioned signal loss problem to a certain extent, in this embodiment, each first connection line 24 electrically connecting the electrode block 21 farther from the driver 30 and the driver 30 is configured to include a structure comprising at least two wires in parallel, so as to reduce the resistance of the first connection line 24 to a certain extent without changing the distance between the electrode block 21 electrically connected to the driver 30 (that is, without changing the length of the first connection line 24). (The total resistance of multiple resistors connected in parallel is less than the resistance of any of the multiple resistors. The wire itself has a resistance value. In this embodiment, connecting at least two wires in parallel is equivalent to connecting at least two resistors in parallel.) In this embodiment, a first connection line 24 includes a wire 241 and a wire 242 connected in parallel. The second connection line 25 electrically connecting each electrode block 21 closer to the driver 30 and the driver 30 is configured to include a wire 251. In this embodiment, the resistivity of the wire 241, the wire 242, and the wire 251 is equal (that is, the resistance values ​​of the wires 241, the wire 242, and the wire 251 of the same length are equal).

[0028] In this embodiment, the position on the electrode block 21 corresponding to the projection of each through hole 231 on the electrode block 21 is defined as the electrical contact point between the first connecting wire 24 or the second connecting wire 25 and the electrode block 21. The length of the first connecting wire 24 or the second connecting wire 25 mentioned above refers to the distance between the electrical contact point on the electrode block 21 to which the first connecting wire 24 or the second connecting wire 25 is electrically connected and the driver 30.

[0029] like Figure 2 As shown in , in each column 22, among the mth to nth electrode blocks 21, the length difference of the first connecting line 24 electrically connecting every two adjacent electrode blocks 21 along the X direction is actually substantially equal to the distance between every two adjacent electrode blocks 21 along the X direction and the width of one electrode block 21 along the X direction. Since in actual products, the distance between every two adjacent electrode blocks 21 along the X direction is small, and the width of each electrode block 21 along the X direction is also small, the length difference of the first connecting line 24 electrically connecting every two adjacent electrode blocks 21 along the X direction is small. Since the resistivity of the wires 241 and 242 constituting each first connecting line 24 is equal, the difference in resistance between the first connecting lines 24 electrically connected to each two adjacent electrode blocks 21 in the mth to nth electrode blocks 21 is relatively small. Furthermore, since the resistivity of the wires 251 constituting each second connecting line 25 is equal, the difference in resistance between the second connecting lines 25 electrically connected to each two adjacent electrode blocks 21 in the 1st to m-1th electrode blocks 21 is also relatively small. Furthermore, since the distances between the electrode blocks 21 are equal, the difference in resistance between the first connecting lines 24 electrically connected to each two adjacent electrode blocks 21 in the mth to nth electrode blocks 21 is equal, and the difference in resistance between the second connecting lines 25 electrically connected to each two adjacent electrode blocks 21 in the 1st to m-1th electrode blocks 21 is also equal. Therefore, although there is still a resistance difference between the first connection lines 24 electrically connected to each two adjacent electrode blocks 21 and between the second connection lines 25 electrically connected to each two adjacent electrode blocks 21, the resistance difference is small, and the impact of the above resistance difference on the image display of the touch display device 10 is not easily noticeable to the human eye.

[0030] However, Figure 2As shown in FIG, in each column 22, the m-1th electrode block is arranged adjacent to the m-th electrode block 21, the m-1th electrode block is electrically connected to the second connecting line 252, and the m-th electrode block 21 is electrically connected to the first connecting line 243. The length difference between the first connecting line 243 and the second connecting line 252 is small, and therefore, the length difference between the first connecting line 243 and the second connecting line 252 has little effect on the difference in resistance between the two. However, the first connecting line 243 comprises a conductor 241 and a conductor 242 connected in parallel, while the second connecting line 252 comprises only the conductor 251. The resistivities of the conductors 241, 242, and 251 are equal. Therefore, the structural differences between the first connecting line 243 and the second connecting line 252 result in a resistance difference significantly greater than the resistance difference between the second connecting lines 25 electrically connected to each adjacent pair of electrode blocks 21 in the first through m-1th electrode blocks 21. This difference is also significantly greater than the resistance difference between the second connecting lines 25 electrically connected to each adjacent pair of electrode blocks 21 in the first through m-1th electrode blocks 21. Specifically, the resistance of the second connecting line 252 is greater than the resistance of the first connecting line 243.

[0031] Therefore, at the position corresponding to the first connecting line 243 and the second connecting line 252, the resistance difference suddenly increases, causing the human eye to easily perceive the abnormal image displayed by the touch display device 10 caused by the resistance difference (horizontal stripes that are easily perceived by the human eye appear at the position corresponding to the first connecting line 243 and the second connecting line 252 in the image), affecting the image display quality.

[0032] Therefore, in this embodiment, by adjusting the number of through holes 231 through which the first connecting line 243 and the second connecting line 252 are electrically connected to the electrode block 21 respectively, the resistance value of the first connecting line 243 is increased by increasing the length of the first connecting line 243, thereby reducing the resistance value difference between the first connecting line 243 and the second connecting line 252.

[0033] The touch module 20 provided in this embodiment has a substantially identical structure in each row 22. Figure 2 The structure of one of the columns 22 is described in detail, and the structures of the other columns 22 are not described in detail.

[0034] Please continue reading Figure 2 In a column 22, except for the first connecting line 243, the remaining first connecting lines 24 are electrically connected to an electrode block 21 through the same number of through holes 231, and in each first connecting line 24, the wire 241 and the wire 242 constituting the first connecting line 24 are electrically connected to the same electrode block 21 through the same number of through holes 231.

[0035] In a column 22, the first connecting line 243 is electrically connected to the mth electrode block 213 through a first number of through holes 231, and the remaining first connecting lines 24 are electrically connected to one of the m+1th to nth electrode blocks 21 through a second number of through holes 231, respectively, and the first number is less than the second number.

[0036] Because the first number is less than the second number, that is, compared to the remaining first connecting wires 24, the first connecting wire 243 is electrically connected to the electrode block 213 through a smaller number of through-holes 231. Therefore, the location of each through-hole 231 corresponding to the electrode block 213 can be moved away from the driver 30, causing the electrical contact point on the electrode block 213 closest to the driver 30 to move away from the driver 30. In other words, the distance between the driver 30 and the electrical contact point on the electrode block 213 closest to the driver 30 increases. In other words, the length of the first connecting wire 243 electrically connected to the electrode block 213 increases. Since the resistance of the first connecting wire 243 is proportional to its length, the resistance of the first connecting wire 243 increases. Furthermore, the resistance of the second connecting wire 252 adjacent to the first connecting wire 243 does not change. Therefore, the increase in the resistance of the first connecting wire 243 reduces the resistance difference between the first connecting wire 243 and the second connecting wire 252 to a certain extent.

[0037] In the touch module 20, the specific number of through-holes 231 through which the first connecting wire 243 establishes electrical connection with the electrode block 213 is determined based on parameters such as the resistivity of the wires 241, 242, and 251, and the lengths of the wires 241, 242, and 251, so as to appropriately determine the number of through-holes 231. In one embodiment, the number of through-holes 231 through which the first connecting wire 243 establishes electrical connection with the electrode block 213 is determined to ensure that the resistance difference between the first connecting wire 243 and the second connecting wire 252 is within 200 ohms.

[0038] It should be understood that Figure 2 The number of through-holes 231 for establishing electrical connections between first connecting wires 24 or second connecting wires 25 and electrode blocks 21 is shown for illustrative purposes only and is not intended to limit the present invention. In one embodiment, first connecting wire 243 is electrically connected to one electrode block 21 through 20 through-holes (i.e., the first number is 20). All first connecting wires 24 in row 22, excluding first connecting wire 243, are electrically connected to one electrode block 21 through 120 through-holes 231 (i.e., the second number is 120).

[0039] Since the position, size, depth, etc. of the through hole 231 in the touch module 20 may not meet the requirements, causing the through hole 231 to fail, it is beneficial to provide a first connecting line 24 and a second connecting line 25 to be electrically connected to an electrode block 21 through multiple through holes 231 respectively. When a failed through hole 231 exists, there are still effective through holes 231 to support the electrical connection between the first connecting line 24 and the second connecting line 25 and the electrode block 21, which is beneficial to ensuring the yield of the touch module 20.

[0040] Therefore, the touch display device 10 provided in this embodiment includes a touch module 20, wherein the touch module 20 includes an electrode block array composed of multiple electrode blocks 21, and the electrode block array includes multiple columns 22. In each column 22, the m+1 to n-th electrode blocks are respectively electrically connected to a first connecting line 243, the m-th electrode block is electrically connected to a first connecting line 243 through a first number of through holes 231, and the m-1-th electrode block is electrically connected to a second connecting line 252 through a second number of through holes 231. Since the m-1th electrode block is arranged adjacent to the mth electrode block, and the resistance value difference between the second connection line 252 electrically connected to the m-1th electrode block and the first connection line 243 electrically connected to the mth electrode block is relatively large, by setting the first number to be smaller than the second number, the length of the first connection line 243 is increased to increase the resistance value of the first connection line 243, which is beneficial to reducing the resistance value difference between the first connection line 243 and the second connection line 252 without changing the position of the mth electrode block and the driver 30 and without adding additional wiring, thereby helping to improve the image display quality of the touch display device 10 where the touch module 20 is located.

[0041] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as they are within the scope of the essential spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. A touch module, applied to a touch display device, wherein the touch display device comprises a driver; characterized in that: The touch module comprises: A plurality of electrode blocks are arranged in an electrode block array including a plurality of rows and a plurality of columns, wherein the driver is located at one end of the column direction and is spaced apart from the plurality of electrode blocks; an insulating layer covering the plurality of electrode blocks, wherein a plurality of through holes are formed in a region of the insulating layer corresponding to each electrode block; and A plurality of first connection lines and a plurality of second connection lines, wherein the plurality of first connection lines and the plurality of second connection lines are both arranged on a surface of the insulating layer away from the plurality of electrode blocks, each of the first connection lines comprises at least two parallel wires, each of the second connection lines comprises a wire, the wires of the first connection lines and the wires of the second connection lines have the same resistivity, and each of the wires is electrically connected to the driver; Each column includes n electrode blocks, and in each column, the distance between each electrode block and the driver gradually increases from the 1st to the nth electrode block, and the 1st to the m-1th electrode blocks in each column are respectively electrically connected to a second connecting line, and the mth to the nth electrode blocks are respectively connected to a first connecting line, and the mth electrode block is electrically connected to a first connecting line through a first number of through holes, and the m+1th to the nth electrode blocks are respectively electrically connected to a first connecting line through a second number of through holes, wherein the first number is less than the second number, 1<m<n, and m and n are integers; The difference in resistance values ​​of the first connecting wires / the second connecting wires electrically connected to the adjacently arranged electrode blocks is less than 200 ohms.

2. The touch module according to claim 1, wherein: Each first connecting line includes the same number of the conductive wires.

3. The touch module according to claim 1, wherein: Each column includes the same number of electrode blocks, the number of electrode blocks electrically connected to the first connection lines in each column is equal, and the number of electrode blocks electrically connected to the second connection lines in each column is equal.

4. The touch module according to claim 3, characterized in that: In each column, two thirds of the electrode blocks are electrically connected to the first connection line, and one third of the electrode blocks are electrically connected to the second connection line. 5 . The touch module as claimed in claim 1 , wherein each first connecting line and each second connecting line are parallel to each other.

6. The touch module according to claim 1, wherein: The first number is less than 120, and the second number is less than or equal to 120.

7. A touch display device, characterized in that: include: A touch module, wherein the touch module is the touch module according to any one of claims 1 to 6; as well as A driver is used to output a touch driving signal to the plurality of electrode blocks.

8. The touch display device according to claim 7, wherein: The touch display device is an embedded touch display device, and the plurality of electrode blocks are time-division multiplexed for display and touch.

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