CN108920031B - Reflective touch substrate and display device - Google Patents
Reflective touch substrate and display device Download PDFInfo
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- CN108920031B CN108920031B CN201810826601.6A CN201810826601A CN108920031B CN 108920031 B CN108920031 B CN 108920031B CN 201810826601 A CN201810826601 A CN 201810826601A CN 108920031 B CN108920031 B CN 108920031B
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- strip
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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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
Abstract
The invention provides a reflective touch substrate and a display device, and belongs to the technical field of display. The reflective touch substrate of the present invention comprises: the liquid crystal display panel comprises a substrate, a plurality of data lines and a plurality of grid lines, wherein the data lines and the grid lines are arranged in a crossed mode to define a plurality of pixel regions; the reflective touch substrate further comprises: a plurality of first reflective strips; each first reflection strip penetrates through one column of pixel areas; wherein at least a portion of the first reflective strips serve as a touch line.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a reflective touch substrate and a display device.
Background
The existing self-capacitance TDDI technology uses a common electrode in a pixel area as a touch capacitor, divides the common electrode originally distributed on the whole surface into independent blocks according to a certain area (n × m complete pixels) and arranges the blocks in a matrix, and then selectively connects different common electrode blocks by using different touch wires. The common electrode is driven by the touch control line to provide common voltage in the display stage by utilizing the time-sharing driving function supported by the IC, and the touch control electrode is driven by the touch control line to serve as the touch control electrode in the touch control stage.
However, there is no touch substrate combining the touch substrate and the reflective display substrate in the prior art, and the present embodiment provides a novel touch substrate combining the touch substrate and the reflective display substrate.
Disclosure of Invention
The present invention is directed to at least one of the technical problems in the prior art, and provides a reflective touch substrate and a display device.
The technical scheme adopted for solving the technical problem of the invention is a reflective touch substrate, which comprises: the liquid crystal display panel comprises a substrate, a plurality of data lines and a plurality of grid lines, wherein the data lines and the grid lines are arranged in a crossed mode to define a plurality of pixel regions; the reflective touch substrate further comprises: a plurality of first reflective strips; each first reflection strip penetrates through one column of pixel areas; wherein at least a portion of the first reflective strips serve as a touch line.
Preferably, the touch line and the data line are arranged on the same layer and are made of the same material.
Preferably, a thin film transistor is provided in each of the pixel regions; each first reflection strip comprises a first side, close to the thin film transistor of the pixel area of the column where the first reflection strip is located, and a second side parallel to the first side; wherein the content of the first and second substances,
a first reflection structure is arranged in an area between the first side of each first reflection strip and the thin film transistor in the pixel area of the column where the first reflection strip is located;
a second reflective structure is disposed in a region between the second side of the first reflective stripe and the data line adjacent to the second side of the first reflective stripe.
Preferably, the first reflective strip and the orthographic projections of the first reflective structure and the second reflective structure adjacent to the first reflective strip on the substrate are seamlessly jointed.
Preferably, the first reflective structure and the second reflective structure are disposed on the same layer as the gate line, and have the same material.
Preferably, the first reflective structure and the second reflective structure are both disposed on the same layer as the first reflective strip, and are made of the same material, and the first reflective structure and the second reflective structure both include second reflective strips, and the second reflective strips are spaced apart from the first reflective strips.
Preferably, the reflective touch substrate further includes a third reflective strip disposed on the same layer as the gate line; wherein the content of the first and second substances,
and the orthographic projection of the second reflection strip and the third reflection strip in the area between the second side of the first reflection strip and the adjacent data line is in seamless connection with the orthographic projection of the touch line on the substrate.
Preferably, each of the pixel regions further includes a pixel electrode and a common electrode; wherein the pixel electrode is connected with the drain electrode of the thin film transistor.
Preferably, a touch electrode connected with the layer on which the touch line is located is further arranged above the layer on which the touch line is located; and the touch electrode and the common electrode are multiplexed in a time-sharing manner.
Preferably, the common electrode is located on a side of the pixel electrode facing away from the substrate; wherein the content of the first and second substances,
the pixel electrode is a plate electrode, and the common electrode is a slit electrode.
The technical scheme adopted for solving the technical problem of the invention is a display device which comprises the reflective touch substrate.
Drawings
Fig. 1 is a schematic structural diagram of a reflective touch substrate according to embodiment 1 of the present invention;
fig. 2 is a cross-sectional view of a reflective touch substrate according to embodiment 1 of the invention;
fig. 3 is a cross-sectional view of a reflective touch substrate according to embodiment 2 of the invention;
fig. 4 is a top view of a reflective touch substrate according to embodiment 2 of the invention;
fig. 5 is a cross-sectional view of a reflective touch substrate according to embodiment 3 of the invention.
Wherein the reference numerals are: 10. a gate line; 20. a data line; 30. a touch line (first reflection bar); 1. a substrate; 2. a thin film transistor; 3. a touch electrode; 4. a first reflective structure; 5. a second reflective structure; 6. a pixel electrode; 7. a common electrode; 41. a second reflective strip; 8. and a third reflective strip.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1:
referring to fig. 1 and 2, the present embodiment provides a reflective touch substrate, including: the liquid crystal display panel comprises a substrate 1, a plurality of data lines 20 and a plurality of gate lines 10, wherein the plurality of gate lines 10 and the plurality of data lines 20 are arranged in a crossed mode to define a plurality of pixel regions; in addition, the reflective touch substrate of the present embodiment includes a plurality of first reflective strips, each of the first reflective strips penetrates through a row of pixel regions, and is configured to reflect, from the pixel region, ambient light irradiated onto the first reflective strips for displaying when the reflective touch substrate is used in a display device to display; in particular, at least a portion of the first reflective strips is used as the touch lines 30 in this embodiment.
Since the first reflective strip penetrating the pixel region is used as the touch line 30 in the reflective touch substrate of the present embodiment, that is, the touch line 30 is disposed in the pixel region, compared to the prior art in which the data line 20 and the touch line 30 are disposed side by side and both disposed in the non-display region, the distance between the data line 20 and the touch line 30 in the present embodiment is significantly greater than the distance between the data line 20 and the touch line 30 in the prior art, thereby effectively avoiding the crosstalk problem between the data line 20 and the touch line 30. Meanwhile, the touch line 30 can reflect light irradiated thereon, so that the touch substrate of the embodiment is applied to a display device, and reflective display can be realized without the need of a backlight source.
Example 2:
the present embodiment provides a reflective touch substrate, which includes: the liquid crystal display device includes a substrate 1, a plurality of gate lines 10, a plurality of data lines 20, and a plurality of first reflective stripes on the substrate 1, wherein a portion of the first reflective stripes are used as touch lines. Wherein, the gate line 10 and the data line 20 are crossed to define a pixel region; each pixel region also comprises a thin film transistor 2, a pixel electrode and a common electrode; certainly, a touch electrode connected to the touch line 30 is further disposed above the layer where the touch line 30 (i.e., the first reflective strip) is located, so as to implement a touch function.
Here, the thin film transistor 2 in the present embodiment may be a top gate thin film transistor 2 or a bottom gate thin film transistor 2. In the following description, the thin film transistor 2 is taken as an example of the bottom gate thin film transistor 2. Meanwhile, for simple wiring on the touch substrate, the sources of the tfts 2 in the pixel regions in the same column are usually connected to the same data line 20, and the gates of the tfts 2 in the pixel regions in the same row are connected to the same gate line 10.
In order to achieve the lightness and thinness of the touch substrate, the common electrode 7 and the touch electrode are time-division multiplexed in the embodiment, that is, the same touch signal can be input to several common electrodes 7 arranged in an array at the touch stage to be used as one touch electrode. Meanwhile, for the accuracy of touch detection, touch electrodes should be disposed in the touch substrate as much as possible, and each touch electrode is controlled by a separate touch line 30, so in this embodiment, the first reflective strips are used as the touch lines 30 as an example to explain the present embodiment.
Specifically, as shown in fig. 3 and 4, in the reflective touch substrate of the present embodiment, each touch line 30 includes a first side of the thin film transistor 2 close to the pixel region of the column where the touch line is located, and a second side parallel to the first side. A first reflection structure 4 is arranged in the area between the first side of each touch line 30 and the thin film transistor 2 in the pixel area of the column where the touch line is located; a second reflective structure 5 is disposed in a region between the second side of the touch line 30 and the data line 20 adjacent to the second side of the touch line 30. Therein, it should be understood that the first and second reflective structures 4 and 5 are only for reflection of light rays, and thus the first and second reflective structures 4 and 5 are in a floating (floating) state.
Thus, in the reflective touch substrate of the present embodiment, not only the external light can be reflected by the touch line 30, but also the external light can be reflected by the first reflective structure 4 and the second reflective structure 5, so as to increase the reflective area. In addition, the second reflection structure 5 is additionally arranged in the area between the data line 20 and the touch line 30, so that the problem of parasitic capacitance crosstalk between the data line 20 and the touch line 30 can be effectively avoided, and the first reflection structure 4 is arranged between the touch line 30 and the area where the thin film transistor 2 is located, so that the problem of parasitic capacitance crosstalk between the gate line 10 and the touch line 30 can be effectively avoided.
In order to simplify the manufacturing process, the touch line 30 and the data line 20, and the source and the drain of the thin film transistor 2 are preferably manufactured in a one-step patterning process, that is, the touch line 30 and the data line 20, and the source and the drain of the thin film transistor 2 are disposed in the same layer and made of the same material.
Similarly, the first reflective structure 4, the second reflective structure 5, the gate line 10 and the gate electrode of the thin film transistor 2 are prepared in a one-step composition process, that is, the first reflective structure 4, the second reflective structure 5, the gate line 10 and the gate electrode of the thin film transistor 2 are arranged in the same layer and made of the same material.
Preferably, as shown in fig. 4, the touch line 30 is seamlessly connected with the orthographic projections of the first reflective structure 4 and the second reflective structure 5 adjacent thereto on the substrate 1. Thus, the area of the light emitting surface of the touch substrate is effectively increased. It should be noted here that the overlapping width of the orthographic projection of the first reflective structure 4 and the touch line 30 on the substrate 1 is about 0-2 μm, and similarly, the overlapping width of the orthographic projection of the second reflective structure 5 and the touch line 30 on the substrate 1 is about 0-2 μm. The arrangement is so that even if the first reflective structure 4, the second reflective structure 5 and the touch line 30 are not on the same layer, and there is an alignment error in the manufacturing process, it can be fully ensured that the touch line 30 and the projections of the first reflective structure 4 and the second reflective structure 5 adjacent thereto on the substrate 1 are a complete plane. Moreover, since the first and second reflective structures 4 and 5 are both in the floating state, even if the first and second reflective structures 4 and 5 overlap the touch lines, there is no influence, and the signal pulling between the touch lines 30 and the gate lines 20 is not affected. Wherein, each pixel region not only comprises the thin film transistor 2, but also comprises a pixel electrode 6 and a common electrode 7; wherein the pixel electrode 6 in each pixel region is connected to the drain electrode of the thin film transistor 2. In order to facilitate connection of the pixel electrode 6 to the drain electrode of the thin film transistor 2, the common electrode 7 is preferably disposed on a side of the pixel electrode 6 facing away from the substrate 1; a passivation layer is arranged between the pixel electrode 6 and the layer where the drain electrode of the thin film transistor 2 is located, and the pixel electrode 6 is connected with the drain electrode of the thin film transistor 2 through a via hole penetrating through the passivation layer. In the present embodiment, it is preferable that the pixel electrode 6 is a plate electrode and the common electrode 7 is a slit electrode. Of course, the pixel electrode 6 and the common electrode 7 may be both provided as slit electrodes, and the slit positions of the two may be alternately arranged.
In the reflective touch substrate of the present embodiment, the common electrode 7 and the touch electrode 3 in each pixel region are multiplexed in a time-sharing manner, that is, the common electrode 7 is used as the common electrode 7 in the display stage, and forms an electric field with the pixel electrode 6 according to the magnitude of the applied voltage, so as to drive the liquid crystal layer to rotate, thereby realizing the display of different gray scales; in the touch stage, the common electrode 7 is used as the touch electrode 3 for recognizing the touch information according to the sensed touch information. For the connection between the common electrode 7 and the touch line 30, the common electrode 7 and the touch line 30 need to be connected through a via hole penetrating through the interlayer insulating layer and the passivation layer between the pixel electrode 6 and the common electrode 7.
Example 3:
the present embodiment provides a reflective touch substrate, the structure of which is substantially the same as that of the touch substrate in embodiment 2, as shown in fig. 5, the touch substrate in this embodiment is different from the touch substrate in embodiment 2 in the arrangement of the first reflective structure 4 and the second reflective structure 5. In the embodiment, the first reflective structure 4 and the second reflective structure 5 are disposed on the same layer as the touch line 30, and the first reflective structure 4 and the second reflective structure 5 at least include the second reflective strip 41, and the first reflective strip 41 and the touch line 30 are disposed at an interval. The touch substrate further comprises a third reflective strip 8 arranged on the same layer as the grid line 10; the second reflective stripe 41 and the third reflective stripe 8 located in the area between the first side of the touch line 30 and the thin film transistor 2 in the pixel area where the touch line is located, and the second reflective stripe 41 and the third reflective stripe 8 located in the area between the second side of the touch line 30 and the data line 20 adjacent to the second side of the touch line 30 are seamlessly connected with the orthographic projection of the touch line 30 on the substrate 1. Thus, the area of the light emitting surface of the touch substrate is effectively increased.
As shown in fig. 5, two second reflective strips 41 are respectively disposed on two sides of the touch line 30, and four third reflective strips 8 are correspondingly disposed at positions corresponding to the layer where the gate line 10 is located. When the touch screen is set, the width of the overlapping projection of the second reflection bar 41 and the third reflection bar 8 should be about 0-2 μm, and similarly, the width of the overlapping projection of the third reflection bar 8 and the data line 20 and the width of the overlapping projection of the third reflection bar 8 and the touch line 30 are also about 0-2 μm.
The rest of the structure of the reflective touch substrate in this embodiment is the same as that in embodiment 2, and will not be described in detail here.
Example 4:
the embodiment of the invention provides a display device, which comprises the reflective touch substrate, wherein the display device does not need a backlight source and has a better display effect.
The display device may be a liquid crystal display device, such as any product or component with a display function, such as a liquid crystal panel, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A reflective touch substrate, comprising: the liquid crystal display panel comprises a substrate, a plurality of data lines and a plurality of grid lines, wherein the data lines and the grid lines are arranged in a crossed mode to define a plurality of pixel regions; characterized in that, reflective touch-control base plate still includes: a plurality of first reflective strips; each first reflection strip penetrates through one column of pixel areas; wherein the first reflective strip serves as a touch line;
a thin film transistor is arranged in each pixel area; each first reflection strip comprises a first side, close to the thin film transistor of the pixel area of the column where the first reflection strip is located, and a second side parallel to the first side; wherein the content of the first and second substances,
a first reflection structure is arranged in an area between the first side of each first reflection strip and the thin film transistor in the pixel area of the column where the first reflection strip is located;
a second reflective structure is disposed in a region between the second side of the first reflective stripe and the data line adjacent to the second side of the first reflective stripe.
2. The reflective touch substrate of claim 1, wherein the first reflective strips and the data lines are disposed on the same layer and are made of the same material.
3. The reflective touch substrate of claim 1, wherein the first reflective strip is seamlessly joined to the orthographic projections of the first reflective structure and the second reflective structure adjacent to the first reflective strip on the substrate.
4. The reflective touch substrate of claim 1, wherein the first reflective structure and the second reflective structure are disposed on the same layer as the gate line and are made of the same material.
5. The reflective touch substrate of claim 1, wherein the first reflective structure and the second reflective structure are disposed on the same layer as the first reflective strip and are made of the same material, and the first reflective structure and the second reflective structure include second reflective strips disposed at intervals from the first reflective strips.
6. The reflective touch substrate of claim 5, further comprising a third reflective strip disposed on the same layer as the gate line; wherein the content of the first and second substances,
and the orthographic projection of the second reflection strip and the third reflection strip in the area between the second side of the first reflection strip and the adjacent data line is in seamless connection with the orthographic projection of the touch line on the substrate.
7. The reflective touch substrate of claim 1, further comprising a pixel electrode and a common electrode in each of the pixel regions; wherein the pixel electrode is connected with the drain electrode of the thin film transistor.
8. The reflective touch substrate of claim 7, wherein a touch electrode is disposed above the layer on which the touch line is disposed; and the touch electrode and the common electrode are multiplexed in a time-sharing manner.
9. The reflective touch substrate of claim 7, wherein the common electrode is located on a side of the pixel electrode facing away from the substrate; wherein the content of the first and second substances,
the pixel electrode is a plate electrode, and the common electrode is a slit electrode.
10. A display device comprising the reflective touch substrate according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810826601.6A CN108920031B (en) | 2018-07-25 | 2018-07-25 | Reflective touch substrate and display device |
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| CN201810826601.6A CN108920031B (en) | 2018-07-25 | 2018-07-25 | Reflective touch substrate and display device |
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| CN108920031A CN108920031A (en) | 2018-11-30 |
| CN108920031B true CN108920031B (en) | 2021-05-18 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043270A (en) * | 2009-10-26 | 2011-05-04 | 上海天马微电子有限公司 | Touch-control type liquid crystal display device |
| CN102999219A (en) * | 2012-11-30 | 2013-03-27 | 北京京东方光电科技有限公司 | Semi-transmissive semi-reflective embedded touch panel, driving method thereof and display device |
| CN107843996A (en) * | 2017-10-23 | 2018-03-27 | 上海天马微电子有限公司 | Touch-control display panel and display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9030438B2 (en) * | 2012-08-16 | 2015-05-12 | Eastman Kodak Company | Pixel-aligned micro-wire electrode device |
| CN107422507B (en) * | 2017-09-29 | 2020-04-03 | 上海天马微电子有限公司 | Liquid crystal display panel and display device |
| CN107991802A (en) * | 2017-12-06 | 2018-05-04 | 上海天马微电子有限公司 | A kind of display device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043270A (en) * | 2009-10-26 | 2011-05-04 | 上海天马微电子有限公司 | Touch-control type liquid crystal display device |
| CN102999219A (en) * | 2012-11-30 | 2013-03-27 | 北京京东方光电科技有限公司 | Semi-transmissive semi-reflective embedded touch panel, driving method thereof and display device |
| CN107843996A (en) * | 2017-10-23 | 2018-03-27 | 上海天马微电子有限公司 | Touch-control display panel and display device |
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