TWI719572B - Touch module and touch display device - Google Patents

Abstract

The present disclosure provides a touch module including: a plurality of electrode blocks arranged in an array including a plurality of rows and plurality of columns; an insulating layer covering the electrode blocks, and each area of the insulating layer corresponding to each electrode block is provided with a plurality of through holes; a plurality of first wires and a plurality of second wires. The first wires and the second wires are disposed on a side of the insulating layer away from the plurality of electrode blocks and electrically connected to a driver. Each column includes n electrode blocks, and in each column, distance between electrode block and the driver is gradually increased from the first to the n^th electrode block. Each electrode block of the first to m-1^th electrode blocks in each column electrically connected to a second wire, each electrode block of m^th to nth electrode blocks in each column is electrically connected to a first wire. The m^th electrode block is electrically connected to a first wire by a first number of through holes, and the m+1^th to nth electrode blocks are electrically connected to a first wire through a second number of through holes, respectively. The disclosure also provides a touch display device.

Description

Touch control module and touch display device

The present invention relates to the technical field of touch display, in particular to a touch module and a touch display device using the touch module.

The conventional electronic device usually has a screen display function and a touch function to facilitate human-computer interaction. Among 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. A conventional touch panel includes a plurality of touch electrodes and a driver electrically connected to each touch electrode through wires. Because the distance between each touch electrode and the driver is different, the length of the trace between each touch electrode and the driver is different. The traces of different lengths have different loads. Between adjacent touch electrodes, if the trace is loaded The large difference may easily affect the picture displayed on the display panel, for example, horizontal stripes appear when the picture is displayed on the display panel, resulting in the deterioration of the picture display quality.

One aspect of the present invention provides a touch module, which is applied to a touch display device, the touch display device includes a driver; the touch module includes: a plurality of electrode blocks arranged in electrode blocks including multiple rows and multiple columns In an array, the driver is located at one end of the column direction and is arranged spaced apart from the plurality of electrode blocks; an insulating layer covering the plurality of electrode blocks, and a plurality of through holes are provided on the insulating layer in a region corresponding to each electrode block; and A plurality of first connection wires and a plurality of second connection wires, the plurality of first connection wires and the plurality of second connection wires are all disposed on the side of the insulating layer away from the plurality of electrode blocks and are connected to The driver is electrically connected; each column includes n electrode blocks, and in each column, the distance between each electrode block and the driver gradually increases from the first to the nth electrode block, and the first to the first in each column m-1 electrode blocks are respectively electrically connected to a second connecting line, the mth to nth electrode blocks are respectively connected to a first connecting line, the mth Each electrode block is electrically connected to a first connection line through a first number of through holes, and the m+1 to nth electrode blocks are electrically connected to a first connection line through a second number of through holes, respectively, Wherein, the first number is smaller than the second number, 1<m<n, and m and n are integers.

Another aspect of the embodiments of the present invention provides a touch display device, including: a touch module, the touch module is the above-mentioned touch module; and a driver, the driver is used to output a touch drive signal to The plural electrode blocks.

The touch module provided by the embodiment of the present invention includes an electrode block array composed of a plurality of electrode blocks. The electrode block array includes a plurality of rows. In each row, the first to m-1 electrode blocks are respectively connected to a second connecting line Are electrically connected, the m-th to n-th electrode blocks are respectively connected to a first connection line, the m-th electrode block is electrically connected to a second connection line through a first number of through holes, and the m+1th The first to nth electrode blocks are electrically connected to a first connection line through a second number of through holes, respectively. By setting the first number to be smaller than the second number, it is beneficial to reduce the first connection electrically connected to the m-th electrode block without changing the position of the m-th electrode block and the driver, and without adding additional wiring. The difference in resistance value between the wire and the second connecting wire electrically connected to the m-1th electrode block is beneficial to improve the image display quality of the touch display device applied to the touch module.

10: Touch display device

20: Touch module

21, 213: Electrode block

22: Column

23: Insulation layer

231: Through Hole

24, 243: the first connecting line

241, 242, 251: wire

25, 252: second connection line

26: substrate

30: drive

X: direction

FIG. 1 is a schematic diagram of a module structure of a touch display device provided by an embodiment of the present invention.

FIG. 2 is a schematic diagram of the planar structure of the touch module and the driver in FIG. 1.

3 is a schematic diagram of the cross-sectional structure of the touch module in FIG. 2 along III-III.

Example one

Please refer to FIG. 1, the touch display device 10 provided in this embodiment may be a consumer electronic product such as a mobile phone and a computer, or may be a touch display screen applied to 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 used for detecting a user's touch operation according to the control of the driver 30.

In this embodiment, the touch module 20 is an in-cell touch module. Please refer to FIG. 2. The touch module 20 includes a substrate 26 and a plurality of electrode blocks 21 disposed on the substrate 26. Each electrode block 21 is Transparent conductive material. In this embodiment, each electrode block 21 is a common electrode block, and the time-sharing multiplex is used as a display circuit. Electrode and touch electrode. Please continue to refer to FIG. 2, the plurality of electrode blocks 21 are arranged as an electrode block array including multiple rows and multiple columns. In this embodiment, the rows arranged in the X direction are defined as columns, and the rows arranged in the direction perpendicular to the X direction are defined as rows. In this embodiment, each column 22 includes a plurality of electrode blocks 21, and the number of electrode blocks 21 included in each column 22 is equal. As shown in FIG. 2, the rows 22 in the touch module 20 are arranged in parallel with equal intervals.

Please also refer to FIG. 3, the touch module 20 further includes an insulating layer 23 (not shown in FIG. 2), the insulating layer 23 covers the plurality of electrode blocks 21 described above, and the insulating layer 23 corresponds to an area of each electrode block 21 A plurality of through holes 231 are formed on each of them. That is, each electrode block 21 corresponds to a region of the insulating layer 23, and the region of the insulating layer 23 corresponding to the electrode block 21 is provided with a plurality of through holes 231, wherein each electrode block 21 corresponds to the region of the insulating layer 23 It refers to the area where the orthographic projection of each electrode block 21 on the insulating layer 23 is located. For example, the area on the insulating layer 23 corresponding to the electrode block 21 in FIG. 3 is the area 232.

Please update. Please continue to refer to FIGS. 2 and 3 together. The touch module 20 also includes a plurality of first connecting wires 24 and a plurality of second connecting wires 25. The plurality of first connection wires 24 and the plurality of second connection wires 25 are all disposed on the side of the insulating layer 23 away from the plurality of electrode blocks 21, and each first connection wire 24 and each second connection wire 25 Both are used to electrically connect an electrode block 21 through at least one through hole 231. That is, each electrode block 21 is electrically connected to a first connecting wire 24 or electrically connected to a second connecting wire 25.

Please refer to FIG. 2 again, the driver 30 is arranged on one side in the column direction (X direction) of the plurality of electrode blocks 21. The driver 30 is electrically connected to each of the first connection lines 24 and each of the second connection lines 25 to output touch drive signals to each electrode through the plurality of first connection lines 24 and the plurality of second connection lines 25 Block 21, and receives the touch sensing signal returned by each electrode block 21, so that the touch module 20 can detect the user's touch operation.

Please continue to refer to FIG. 2. Each column 22 includes a total of n-th electrode blocks 21 from the first to the nth. In each column 22, the distance between each electrode block 21 and the driver 30 is gradually from the first to the n-th electrode block 21. It becomes larger, that is, in each column 22, the first electrode block 21 is closest to the driver 30, and the n-th electrode block 21 is the farthest from the driver 30. In each column 22, the first to m−1th electrode blocks 21 are electrically connected to a second connection line 25, and the mth to nth electrode blocks 21 are respectively connected to a first connection line 24. Among them, 1<m<n, m and n are integers.

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

The touch display device 10 includes a plurality of electrode blocks 21, and each electrode block 21 needs to be electrically connected to the driver 30 through a connection line (the aforementioned first connection line 24 or the second connection line 25). In the case that 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 block 21 is from the driver 30, the greater the connection line between the electrode block 21 and the driver 30. The longer the connection line is, the greater the resistance is, and the signal output by the driver 30 will cause greater signal loss on the connection line. Larger signal loss easily affects the image quality of the touch display device 10 during image display.

In order to alleviate the above-mentioned signal loss problem to a certain extent, in this embodiment, each of the first connecting wires 24 electrically connecting the electrode block 21 and the driver 30 farther from the driver 30 is configured to include at least two wires in parallel. On the basis of not changing the distance between the electrode block 21 electrically connected to the first connecting wire 24 and the driver 30 (that is, on the basis of not changing the length of the first connecting wire 24), the resistance of the first connecting wire 24 is reduced to a certain extent (The total resistance of the multiple resistors in parallel is less than the resistance of any one of the aforementioned multiple resistors, and 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 connecting wire 24 includes a wire 241 and a wire 242 connected in parallel with each other. The second connecting wire 25 for electrically connecting each electrode block 21 with the driver 30 that is closer to the driver 30 is configured to include a wire 251. In this embodiment, the resistivity of the wires 241, the wires 242, and the wires 251 are equal (that is, the resistance values of the wires 241, the wires 242, and the wires 251 of the same length are equal).

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 connection line 24 or the second connection line 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 electrical contact point between the driver 30 and the electrical contact point closest to the driver 30 on an electrode block 21 electrically connected to the first connecting wire 24 or the second connecting wire 25 the distance.

As shown in FIG. 2, in each column 22, in the mth to nth electrode blocks 21, the length difference of the first connecting line 24 electrically connected to each two adjacent electrode blocks 21 in the X direction is actually The above is basically equal to the distance between each two adjacent electrode blocks 21 along the X direction and the width of one electrode block 21 along the X direction. Because in actual products, between every two adjacent electrode blocks 21 along the X direction The distance between each electrode block 21 is small, and the width of each electrode block 21 in the X direction is also small. Therefore, the length difference of the first connecting line 24 electrically connected to each two adjacent electrode blocks 21 in the X direction is small. . And since the resistivity of the conductive wire 241 and the conductive wire 242 constituting each first connecting wire 24 are equal, each adjacent electrode block 21 in the m-nth electrode block 21 has the same resistivity. The resistance value difference between the first connecting wires 24 electrically connected to the two electrode blocks 21 is relatively small; in the 1st~m-1th electrode blocks 21, every two adjacent electrode blocks 21 are electrically connected The length difference of the first connecting wire 24 is relatively small, and since the resistivity of the wire 251 constituting each second connecting wire 25 is equal, each of the first to the m-1th electrode blocks 21, every two adjacent The resistance value difference between the second connecting wires 25 electrically connected to the two electrode blocks 21 is also relatively small. Further, since the distances between the electrode blocks 21 are equal, in the mth to nth electrode blocks 21, the resistance value difference between the first connecting wires 24 electrically connected to each two adjacent electrode blocks 21 The values are the same, and the resistance value difference between the second connecting wires 25 electrically connected to every two adjacent electrode blocks 21 in the 1st to the m-1th electrode blocks 21 is the same. Therefore, although there is still a difference in resistance value between the first connection wires 24 electrically connected to each two adjacent electrode blocks 21 and between the second connection wires 25 electrically connected to each two adjacent electrode blocks 21 However, the resistance value difference is small, and the influence of the above-mentioned resistance value difference on the image display of the touch display device 10 is not easy to be noticed by human eyes.

However, as shown in FIG. 2, in each column 22, the m-1th electrode block is arranged adjacent to the mth electrode block 21, and the m-1th electrode block is electrically connected to the second connecting line 252, The m-th electrode block 21 is electrically connected to the first connection line 243. The length difference between the first connection line 243 and the second connection line 252 is relatively small. Therefore, the difference in the length between the first connection line 243 and the second connection line 252 has less influence on the difference in resistance value between the two. However, the first connecting wire 243 is connected in parallel by the wire 241 and the wire 242, and the second connecting wire 252 only includes the wire 251. The resistivity of the wire 241, the wire 242, and the wire 251 are equal. Therefore, the first connection wire 243 and the second connection wire 252 are different from each other. The above-mentioned structural difference between the first connection line 243 and the second connection line 252 makes the resistance value difference between the first connection line 243 and the second connection line 252 much larger than that of the 1st~m-1th electrode blocks 21, and the electric resistance of every two adjacent electrode blocks 21 The resistance value difference between the connected second connecting wires 25 is also much larger than that of the second connecting wires 25 electrically connected to every two adjacent electrode blocks 21 in the first to m-1th electrode blocks 21. The difference between the resistance values. Specifically, the resistance value of the second connection line 252 is greater than the resistance value of the first connection line 243.

Therefore, at the positions corresponding to the first connection line 243 and the second connection line 252, the difference in resistance value suddenly increases, which makes the human eye easily perceive the abnormality of the image displayed by the touch display device 10 caused by the difference in resistance value. (Horizontal stripes appearing in the image corresponding to the first connecting line 243 and the second connecting line 252 are easily perceptible by human eyes), which affects the image display quality.

Therefore, in this embodiment, by adjusting the number of through holes 231 through which the first connection line 243 and the second connection line 252 are electrically connected to the electrode block 21, respectively, the length of the first connection line 243 is increased. The resistance value of the first connection line 243 is increased, and the resistance value difference between the first connection line 243 and the second connection line 252 is reduced.

In the touch module 20 provided in this embodiment, the structure of each row 22 is basically the same. Therefore, the structure of one row 22 in FIG. 2 will be described in detail below, and the structure of the other rows 22 will not be repeated.

Please continue to refer to FIG. 2. In a row 22, except for the first connecting wires 243, the remaining first connecting wires 24 are electrically connected to an electrode block 21 through the same number of through holes 231, and each In a connecting wire 24, the wires 241 and the wires 242 constituting the first connecting wire 24 are electrically connected to the same electrode block 21 through the same number of through holes 231, respectively.

In a row 22, the first connection line 243 is electrically connected to the m-th electrode block 213 through the first number of through holes 231, and the remaining first connection lines 24 are respectively connected to the m-th electrode block 213 through the second number of through holes 231. One of the +1~nth electrode blocks 21 is electrically connected, and the first number is smaller than the second number.

Since the first number is smaller than the second number, that is, compared with the remaining first connection lines 24, the first connection line 243 is electrically connected to the electrode block 213 through a smaller number of through holes 231, and the electrode block 213 corresponds to The position of each through hole 231 can be moved away from the driver 30, so that the electrical contact point on the electrode block 213 closest to the driver 30 moves away from the driver 30, that is, the driver 30 and the electrode block 213 are closest to the driver 30. The distance between the electrical contact points is increased, in other words, the length of the first connection line 243 electrically connected to the electrode block 213 is increased. Since the resistance value of the first connecting wire 243 is proportional to its own length, the resistance value of the first connecting wire 243 increases. Moreover, the resistance value of the second connection line 252 arranged adjacent to the first connection line 243 has not changed, so the increase in the resistance value of the first connection line 243 makes the resistance between the first connection line 243 and the second connection line 252 The difference is reduced to a certain extent.

In the touch module 20, the specific electrical connection between the first connecting wire 243 and the electrode block 213 through the number of through holes 231 depends on the resistivity of the wire 241, the wire 242 and the wire 251, the wire 241, the wire 242 The parameters such as the length of the wire 251 are calculated to set the number of the through holes 231 reasonably. In one embodiment, how many through holes 231 are used to establish an electrical connection between the first connection line 243 and the electrode block 213, which needs to satisfy that the resistance difference between the first connection line 243 and the second connection line 252 is controlled to Conditions within 200 ohms.

It should be understood that the number of through holes 231 for establishing electrical connection between the first connecting wire 24 or the second connecting wire 25 and the electrode block 21 shown in FIG. 2 is only an example, and is not intended to limit the present invention. In one embodiment, the first connection line 243 is electrically connected to an electrode block 21 through 20 through holes (that is, the first number is 20). The remaining first connecting lines 24 in the row 22 except for the first connecting lines 243 are electrically connected to an electrode block 21 through 120 through holes 231 (that is, the second number is 120).

Since the position, size, depth, etc. of the through hole 231 may not meet the requirements in the touch module 20, the through hole 231 may fail. Therefore, the first connection line 24 and the second connection line 25 are provided respectively by The electrical connection of the plurality of through holes 231 with an electrode block 21 is beneficial to the existence of the failed through holes 231 while still having the through holes 231 in a valid state to support the first connection line 24 and the second connection line 25 and the electrode block 21 The electrical connection is beneficial to ensure the yield rate of the touch module 20.

Therefore, the touch display device 10 provided by this embodiment includes a touch module 20. The touch module 20 includes an electrode block array composed of a plurality of electrode blocks 21. The electrode block array includes a plurality of rows 22. , The m+1~nth electrode blocks are respectively electrically connected to a first connection line 243, the mth electrode block is electrically connected to a first connection line 243 through the first number of through holes 231, and the m-1th Each electrode block is electrically connected to a second connection line 252 through a second number of through holes 231. Since the m-1th electrode block is arranged adjacent to the mth electrode block, 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 There is a large difference in resistance value between them. By setting the first number to be smaller than the second number, increasing the length of the first connecting line 243 to increase the resistance value of the first connecting line 243 is beneficial to not changing the m-th electrode block On the basis of the position of the driver 30 and no additional wiring, the resistance difference between the first connecting line 243 and the second connecting line 252 is reduced, which is beneficial to improve the touch of the touch module 20. The image display quality of the display device 10 is controlled.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present invention, and not to limit the present invention. As long as they fall within the essential spirit of the present invention, the above embodiments are appropriately made. Changes and changes fall within the scope of protection of the present invention.

20: Touch module

21, 213: Electrode block

22: Column

231: Through Hole

24, 243: the first connecting line

241, 242, 251: wire

25, 252: second connection line

26: substrate

30: drive

X: direction

Claims (9)

A touch module is applied to a touch display device, the touch display device includes a driver; the improvement is that the touch module includes a plurality of electrode blocks arranged in an electrode block array including multiple rows and multiple columns 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, and a plurality of through holes are opened on the insulating layer in the area corresponding to each electrode block; and A first connection wire and a plurality of second connection wires, the plurality of first connection wires and the plurality of second connection wires are all disposed on the side of the insulating layer away from the plurality of electrode blocks and are connected to the The driver is electrically connected; each column includes n electrode blocks, and in each column, the distance between each electrode block and the driver gradually increases from the first to the nth electrode block, and the first to the mth electrode block in each column -1 electrode blocks are respectively electrically connected to a second connection line, the m-th to n-th electrode blocks are respectively connected to a first connection line, and the m-th electrode block is connected to a first connection line through a first number of through holes The first connection line is electrically connected, and the m+1 th to nth electrode blocks are respectively electrically connected to a first connection line through a second number of through holes, wherein each of the first connection lines includes the same number And the first number is less than the second number, 1<m<n, m and n are integers. The touch module according to claim 1, wherein each first connection line includes at least two wires connected in parallel, each second connection line includes one wire, and each first connection line is connected to each second connection line. Each wire in the connecting wire has the same resistivity. 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 line in each column is equal, and the number of electrode blocks electrically connected to the second connection line in each column The number of electrode blocks is equal. The touch module according to claim 3, wherein 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. In the touch module according to claim 1, each first connection line and each second connection line are parallel to each other. The touch module according to claim 1, wherein the resistance value difference of the first connection line/the second connection line electrically connected to the adjacently arranged electrode blocks is less than 200 ohms. 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. A touch display device, which is improved by comprising: a touch module, the touch module being the touch module according to any one of claims 1 to 7; and a driver, the driver being used for outputting Touch driving signals to the plurality of electrode blocks. The touch display device according to claim 8, wherein the touch display device is an in-cell touch display device, and the plurality of electrode blocks are multiplexed for display and touch in a time-sharing manner.

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