CN110262689B - Embedded touch display panel and array substrate thereof - Google Patents
Embedded touch display panel and array substrate thereof Download PDFInfo
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- CN110262689B CN110262689B CN201910498196.4A CN201910498196A CN110262689B CN 110262689 B CN110262689 B CN 110262689B CN 201910498196 A CN201910498196 A CN 201910498196A CN 110262689 B CN110262689 B CN 110262689B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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Abstract
The invention relates to an embedded touch display panel and an array substrate thereof. The array substrate of the in-cell touch display panel comprises: a scan line extending in a first direction; a data line extending in a second direction; a touch trace extending along a second direction; the common electrode layer forms a plurality of touch electrodes distributed in an array; the touch electrode far away from the touch detection chip side in the touch electrodes is connected to a corresponding channel of the touch detection chip through the corresponding two touch routing wires; the touch electrode adjacent to the side of the touch detection chip in the touch electrodes is connected to a corresponding channel of the touch detection chip through a corresponding first touch wire; the first touch trace is formed by a single touch trace and corresponding auxiliary connection traces. The invention also provides a corresponding display panel. According to the embedded touch display panel and the array substrate thereof, the risk of vertical stripes is reduced to the minimum, the variation value of the touch electrodes is improved, and the difference of the touch electrodes is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to an embedded touch display panel and an array substrate thereof.
Background
With the rapid development of display technology, Touch Screen panels (Touch screens) have gradually spread throughout the lives of people. At present, a touch screen can be divided into: an Add on Mode Touch Panel (Add on Touch Panel), and an In Cell Touch Panel (In Cell Touch Panel). The externally-hung touch screen is produced by separately producing a touch screen and a Liquid Crystal Display (LCD), and then the touch screen and the LCD are attached together to form the LCD with a touch function. And embedded touch-control electrode with the touch-sensitive screen of embedded touch-sensitive screen is embedded inside liquid crystal display, can attenuate the holistic thickness of module, and the cost of manufacture that again can greatly reduced touch-sensitive screen receives each big panel producer and favours.
The array substrate of the conventional in-cell touch display panel mainly includes a glass substrate, and a first metal layer (M1), a first insulating layer, a second metal layer (M2), a second insulating layer, a common electrode layer, a third insulating layer, a third metal layer (M3), a fourth insulating layer, and the like stacked on the glass substrate. The first metal layer forms a plurality of scanning lines, the second metal layer forms a plurality of data lines, the common electrode layer forms a plurality of touch electrodes (sensor pads) distributed in an array, the third metal layer forms a plurality of connecting wires for connecting the touch electrodes and the touch detection chip as touch wires, the touch electrodes are connected with the corresponding connecting wires through via holes in the third insulating layer, and each touch electrode needs to be connected to a corresponding channel of the touch detection chip through the corresponding touch wire.
However, in the touch screen design of the lcd, when the resolution is fixed (for example, 1080RGB 1920), for some touch trace designs of the lcd, the lcd display may have a vertical stripe abnormality. Taking Full High Definition (FHD)1080RGB 1920 resolution as an example, when the channel number (channel number) of the touch screen is designed to be 18 × 32, if a design scheme of two touch traces formed by a third layer of metal (M3) is adopted, each two touch trace includes two connecting traces connecting a same corresponding touch electrode, and the two connecting traces are connected in parallel to a same corresponding channel of the touch sensing chip, then the number of the connecting traces connecting the touch electrodes and the touch sensing chip arranged at intervals in the transverse direction is 64 in total. Referring to fig. 1, which is a schematic view of two touch traces in the prior art, each of the two touch traces 1 includes two connecting traces 2 connected to a same corresponding touch electrode, and the two connecting traces 2 are connected in parallel and then connected to a same corresponding channel of the touch sensing chip. In this scheme, in order to avoid the collision of the spacer (PS) with the hole of the connection trace 2 formed by the third metal layer (M3), a part of the spacer may be located between the RG sub-pixels (R sub-pixel 5 and G sub-pixel 5 in fig. 1), and a part of the spacer may be located between the RB sub-pixels (B sub-pixel 10 and R sub-pixel 11 in fig. 1), and due to the filtering property of the spacer to light with different wavelengths, the two pixels may emit different lights, so as to form vertical stripe uneven brightness (mura).
On the other hand, a design scheme of a single touch trace and a double touch trace mixed together may also be adopted, the single touch trace refers to a touch trace formed by a connection trace formed by a single third metal layer, and the single connection trace is connected to the corresponding touch electrode and the corresponding channel of the touch detection chip. However, if a design scheme that a single touch trace and a double touch trace are mixed to connect the touch electrodes is adopted, a variation (difference) value difference between different touch electrodes is inevitably caused, and a linear result of the touch screen is deteriorated.
Disclosure of Invention
Therefore, an object of the present invention is to provide an embedded touch display panel and an array substrate thereof, which design a novel routing manner of touch routing of a touch screen to reduce the risk of vertical stripes.
To achieve the above object, the present invention provides an array substrate of an in-cell touch display panel, comprising: the display device comprises a glass substrate, a first metal layer, a second metal layer, a third metal layer and a common electrode layer, wherein the first metal layer, the second metal layer, the third metal layer and the common electrode layer are arranged on the glass substrate in a laminated mode; the first metal layer is provided with a plurality of scanning lines extending along a first direction; the second metal layer is provided with a plurality of data lines extending along a second direction; the third metal layer forms a plurality of touch control wires extending along a second direction; the second direction is perpendicular to the first direction; the common electrode layer forms a plurality of touch electrodes distributed in an array; the touch control wires comprise a plurality of double touch control wires, and the touch control electrodes far away from the side of the touch control detection chip in the touch control electrodes are connected to corresponding channels of the touch control detection chip through the corresponding double touch control wires; the touch control wires also comprise a plurality of first touch control wires, and the touch control electrodes adjacent to the side of the touch control detection chip in the touch control electrodes are connected to corresponding channels of the touch control detection chip through the corresponding first touch control wires; each first touch wire is formed by a single touch wire and a corresponding auxiliary connecting wire, the single touch wire and the corresponding auxiliary connecting wire are respectively electrically connected to the corresponding touch electrodes and then connected in parallel, and the dimension of the auxiliary connecting wire in the second direction is close to the dimension of the corresponding touch electrode in the second direction.
A first insulating layer is arranged between the first metal layer and the second metal layer; a second insulating layer is arranged between the second metal layer and the third metal layer; and a third insulating layer is arranged between the third metal layer and the common electrode layer.
The touch routing is connected to the touch electrode through the via hole on the third insulating layer.
The shape of the auxiliary connecting trace is substantially a straight line segment in the second direction.
The size of the auxiliary connecting trace in the second direction is slightly larger than that of the corresponding touch electrode in the second direction, and the auxiliary connecting trace does not overlap with the touch electrode adjacent to the corresponding touch electrode in the second direction.
And the auxiliary connecting wires are connected to the corresponding single touch wire to form a rectangular opening.
Wherein the dimension of the auxiliary connection trace in the first direction is much smaller than the dimension in the second direction.
The size of the auxiliary connecting wires in the first direction is smaller than the distance between the touch control wires.
The invention also provides an in-cell touch display panel, which comprises the array substrate of the in-cell touch display panel.
In summary, the embedded touch display panel and the array substrate thereof of the invention reduce the risk of vertical stripes, improve the variation of the touch electrodes, and reduce the difference of the touch electrodes.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
In the drawings, there is shown in the drawings,
fig. 1 is a schematic diagram of a dual touch trace in the prior art;
fig. 2 is a schematic diagram of a touch trace design according to a preferred embodiment of the embedded touch display panel of the invention.
Detailed Description
The array substrate of the embedded touch display panel is designed with a novel wiring mode of touch wiring of the touch screen, a design scheme of blending a single touch wiring and two touch wirings is optimized, and the invention is mainly characterized in the wiring mode of the touch wiring formed by a third layer of metal in the array substrate. The array substrate of the embedded touch display panel mainly comprises: the display device comprises a glass substrate, a first metal layer, a second metal layer, a third metal layer and a common electrode layer, wherein the first metal layer, the second metal layer, the third metal layer and the common electrode layer are arranged on the glass substrate in a laminated mode; the first metal layer is provided with a plurality of scanning lines extending along a first direction; the second metal layer is provided with a plurality of data lines extending along a second direction; the third metal layer forms a plurality of touch control wires extending along a second direction; the second direction is perpendicular to the first direction; the common electrode layer forms a plurality of touch electrodes distributed in an array; each touch electrode is electrically connected to a corresponding channel of the touch detection chip through a corresponding touch wire; the touch control wires comprise a plurality of double touch control wires, and the touch control electrodes far away from the side of the touch control detection chip in the touch control electrodes are connected to corresponding channels of the touch control detection chip through the corresponding double touch control wires; the touch control wires also comprise a plurality of first touch control wires, and the touch control electrodes adjacent to the side of the touch control detection chip in the touch control electrodes are connected to corresponding channels of the touch control detection chip through the corresponding first touch control wires; each first touch wire is formed by a single touch wire and a corresponding auxiliary connecting wire, the single touch wire and the corresponding auxiliary connecting wire are respectively electrically connected to the corresponding touch electrodes and then connected in parallel, and the dimension of the auxiliary connecting wire in the second direction is close to the dimension of the corresponding touch electrode in the second direction. A first insulating layer may be disposed between the first metal layer and the second metal layer. A second insulating layer may be disposed between the second metal layer and the third metal layer. A third insulating layer may be disposed between the third metal layer and the common electrode layer. The touch routing can be connected to the touch electrode through a via hole arranged in the third insulating layer. The liquid crystal display device can further comprise a fourth insulating layer, a pixel electrode layer and the like.
Fig. 2 is a schematic diagram of a touch trace design of an in-cell touch display panel according to a preferred embodiment of the invention. The common electrode layer forms a plurality of touch electrodes 40 distributed in an array; the touch electrodes 40 are electrically connected to corresponding channels of the touch detection chip 10 through corresponding touch traces respectively; the touch traces include common dual touch traces 20, and the touch electrodes 40 on the side of the touch electrodes 40 away from the touch detection chip 10 are connected to the corresponding channels of the touch detection chip 10 via the corresponding dual touch traces 20; the touch-control traces further include a plurality of first touch-control traces 30, and among the touch-control electrodes, the touch-control electrode adjacent to one side of the touch-control detection chip 10 is connected to the corresponding channel of the touch-control detection chip through the corresponding first touch-control trace 30; each first touch trace 30 is formed by a single touch trace 31 and a corresponding auxiliary connection trace 32, the single touch trace 31 and the corresponding auxiliary connection trace 32 are electrically connected to the corresponding touch electrode 40 respectively and then connected in parallel, and the dimension of the auxiliary connection trace 32 in the second direction is close to the dimension of the corresponding touch electrode 40 in the second direction.
In fig. 2, the shape of the attachment trace 32 is substantially a straight line segment in the second direction. The dimension of the auxiliary connection trace 32 in the second direction may be slightly larger than the dimension of the corresponding touch electrode 40 in the second direction, and the auxiliary connection trace 32 does not overlap with the touch electrodes 40 adjacent to the upper and lower sides of the corresponding touch electrode 40 in the second direction. The auxiliary connection trace 32 is connected to the corresponding single touch trace 31 to form a rectangular opening. The dimension of the auxiliary connection trace 32 in the first direction is much smaller than the dimension in the second direction; the dimension of the auxiliary connecting trace 32 in the first direction is smaller than the distance between the touch traces on the touch electrode 40. By adopting the design scheme of the invention, the following two situations can be simultaneously avoided: the vertical stripes are formed to be uneven in brightness and darkness, and the difference of the variation values among different touch electrodes is caused, so that the linear result of the touch screen is deteriorated.
Taking a full high-definition 1080RGB 1920 resolution as an example, when the number of channels of the touch screen is designed to be 18 × 32, each touch electrode 40 may correspond to 60 rows × 60 columns of pixels, 27 channels on a side of the touch screen away from the touch detection chip 10 may use the conventional dual touch trace 20 as the touch trace, and 5 channels on a side of the touch detection chip 10 may use the design scheme shown as the first touch trace 30 in fig. 2, so that in the touch electrode 40 shown in fig. 2, even if the spacers are located between different sub-pixels, the number of the spacers can be substantially ignored in one frame display, and the risk of vertical stripes is reduced to the minimum. Meanwhile, the variation value of the touch electrode 40 on the side adjacent to the touch detection chip 10 is also the same as the touch electrode 40 connected to the conventional dual touch trace 20.
According to the array substrate of the embedded touch display panel, the invention also correspondingly provides the embedded touch display panel comprising the array substrate.
In conclusion, the flexibility of the touch screen design of the panels with different resolutions is improved, and the selectivity of the touch screen scheme is improved; on the other hand, the display effect of the screen can be improved, and the product quality and the brand competitiveness of the product are improved; the risk of vertical stripes is reduced to the minimum, the variable quantity (buffer) value of the touch electrode can be greatly improved, and the difference of the touch electrode is reduced.
As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.
Claims (7)
1. An array substrate of an in-cell touch display panel, comprising: the display device comprises a glass substrate, a first metal layer, a second metal layer, a third metal layer and a common electrode layer, wherein the first metal layer, the second metal layer, the third metal layer and the common electrode layer are arranged on the glass substrate in a laminated mode; the first metal layer is provided with a plurality of scanning lines extending along a first direction; the second metal layer is provided with a plurality of data lines extending along a second direction; the third metal layer forms a plurality of touch control wires extending along a second direction; the second direction is perpendicular to the first direction; the common electrode layer forms a plurality of touch electrodes distributed in an array; the touch control wires comprise a plurality of double touch control wires, and the touch control electrodes far away from the side of the touch control detection chip in the touch control electrodes are connected to corresponding channels of the touch control detection chip through the corresponding double touch control wires; the touch control wires also comprise a plurality of first touch control wires, and the touch control electrodes adjacent to the side of the touch control detection chip in the touch control electrodes are connected to corresponding channels of the touch control detection chip through the corresponding first touch control wires; each first touch wire is formed by a single touch wire and a corresponding auxiliary connecting wire, the single touch wire and the corresponding auxiliary connecting wire are respectively electrically connected to the corresponding touch electrodes and then connected in parallel, and the dimension of the auxiliary connecting wire in the second direction is close to the dimension of the corresponding touch electrode in the second direction;
the size of the auxiliary connecting trace in the second direction is slightly larger than that of the corresponding touch electrode in the second direction, and the auxiliary connecting trace does not overlap with the touch electrode adjacent to the corresponding touch electrode in the second direction.
2. The array substrate of claim 1, wherein a first insulating layer is disposed between the first metal layer and the second metal layer; a second insulating layer is arranged between the second metal layer and the third metal layer; and a third insulating layer is arranged between the third metal layer and the common electrode layer.
3. The array substrate of claim 2, wherein the touch traces are connected to the touch electrodes through vias on the third insulating layer.
4. The array substrate of claim 1, wherein the shape of the auxiliary connection traces is substantially a straight line segment in the second direction.
5. The array substrate of claim 1, wherein the auxiliary connection traces are connected to the corresponding single touch traces to form a rectangular opening.
6. The array substrate of claim 1, wherein the dimension of the auxiliary connection traces in the first direction is smaller than the pitch between the touch traces.
7. An in-cell touch display panel comprising the array substrate of the in-cell touch display panel according to any one of claims 1 to 6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910498196.4A CN110262689B (en) | 2019-06-10 | 2019-06-10 | Embedded touch display panel and array substrate thereof |
| PCT/CN2019/092514 WO2020248300A1 (en) | 2019-06-10 | 2019-06-24 | In-cell touch display panel and array substrate thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910498196.4A CN110262689B (en) | 2019-06-10 | 2019-06-10 | Embedded touch display panel and array substrate thereof |
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| CN110262689A CN110262689A (en) | 2019-09-20 |
| CN110262689B true CN110262689B (en) | 2021-01-01 |
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| CN201910498196.4A Active CN110262689B (en) | 2019-06-10 | 2019-06-10 | Embedded touch display panel and array substrate thereof |
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| WO (1) | WO2020248300A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111142704B (en) * | 2019-12-13 | 2023-10-31 | 武汉华星光电技术有限公司 | Array substrate and touch display panel |
| CN111625118A (en) * | 2020-05-06 | 2020-09-04 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN114020170A (en) * | 2021-11-04 | 2022-02-08 | 福建华佳彩有限公司 | Layout structure of touch display screen |
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| Publication number | Publication date |
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| CN110262689A (en) | 2019-09-20 |
| WO2020248300A1 (en) | 2020-12-17 |
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