CN210155648U - Self-capacitance touch screen and embedded touch display panel - Google Patents
Self-capacitance touch screen and embedded touch display panel Download PDFInfo
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- CN210155648U CN210155648U CN201921235602.XU CN201921235602U CN210155648U CN 210155648 U CN210155648 U CN 210155648U CN 201921235602 U CN201921235602 U CN 201921235602U CN 210155648 U CN210155648 U CN 210155648U
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Abstract
The utility model discloses a self-capacitance touch screen, which comprises a plurality of touch switches and a plurality of self-capacitance electrodes, wherein the self-capacitance electrodes are distributed in an array manner, and one self-capacitance electrode corresponds to one touch switch; the touch screen comprises a plurality of touch scanning lines, a plurality of longitudinal induction lines along the longitudinal direction and a plurality of transverse induction lines along the transverse direction, wherein the longitudinal induction lines and the transverse induction lines are mutually communicated to form a grid shape, and the touch scanning lines are respectively insulated from the longitudinal induction lines and the transverse induction lines. The self-capacitance touch screen can realize two-dimensional positioning, and can be embedded in an array substrate of a display panel to form an embedded touch display panel. The utility model also provides a touch drive method and embedded touch display panel.
Description
Technical Field
The utility model relates to a touch technology especially relates to a self-capacitance touch screen and embedded touch display panel.
Background
The self-capacitance touch screen refers to a type of touch screen in which a touch sensing capacitor is formed by a self-capacitance electrode and a ground to sense a touch operation of a finger.
An in-cell self-capacitance touch display panel is disclosed in utility model publication No. CN 105094486A. The embedded self-capacitance touch display panel utilizes an array substrate of the display panel, grid scanning lines of the array substrate are shared as touch scanning lines of a self-capacitance touch screen, data lines of the array substrate are shared as touch receiving lines of the self-capacitance touch screen, pixel electrodes of the array substrate are shared as self-capacitance electrodes of the self-capacitance touch screen, and then a time-sharing driving mode is adopted to control picture display and touch induction. However, the array substrate has data lines only in the vertical direction, so the in-cell self-capacitance touch display panel can only sense the position of a finger in the horizontal direction, but cannot sense the position of the finger in the vertical direction, which affects the application range.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a self-capacitance touch screen can realize two-dimensional positioning, and can be embedded in display panel's array substrate, forms embedded touch display panel.
The utility model also provides an embedded touch display panel.
The utility model discloses the technical problem that will solve realizes through following technical scheme:
a self-capacitance touch screen comprises a plurality of touch switches and a plurality of self-capacitance electrodes, wherein the self-capacitance electrodes are distributed in an array manner, and one self-capacitance electrode corresponds to one touch switch; and
the touch scanning lines are used for sending touch scanning signals to the touch switch so as to control the on or off of the inside of the touch switch;
the plurality of longitudinal induction lines are arranged along the longitudinal direction and used for enabling the self-capacitance electrodes in the same column to output longitudinal induction signals, and the self-capacitance electrodes in the same column are connected through the touch switch;
the plurality of transverse induction lines are used for outputting transverse induction signals for the self-capacitance electrodes in the same row and switching on the self-capacitance electrodes in the same row through the touch switches;
the longitudinal induction lines and the transverse induction lines are mutually communicated to form a grid shape, and the touch scanning lines are respectively insulated from the longitudinal induction lines and the transverse induction lines.
Furthermore, the longitudinal induction lines are arranged between the self-capacitance electrodes of the adjacent columns at intervals, and the transverse induction lines are arranged between the self-capacitance electrodes of the adjacent rows at intervals.
Further, the touch scan line is in a lateral direction.
Furthermore, the touch switches corresponding to the self-capacitance electrodes in the same row are simultaneously controlled by the same touch scanning line.
Furthermore, the touch scanning lines are arranged between the self-capacitance electrodes of the adjacent rows at intervals, and the touch switches are also distributed in an array.
Further, one touch switch is individually controlled by one touch scan line.
Furthermore, the touch switches corresponding to the self-capacitance electrodes on the same row are staggered in the transverse direction.
Further, the touch switch is a TFT switch.
An in-cell touch display panel comprises the self-capacitance touch screen.
The utility model discloses following beneficial effect has: the self-capacitance touch screen can realize two-dimensional positioning, and can be embedded in an array substrate of a display panel to form an embedded touch display panel.
Drawings
Fig. 1 is a schematic view of a self-capacitance touch screen provided by the present invention;
fig. 2 is a schematic view of another self-capacitance touch screen provided by the present invention;
fig. 3 is a partial enlarged view of the self-capacitance touch screen provided by the present invention;
fig. 4 is a step diagram of a touch driving method of a self-capacitance touch screen according to the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 3, a self-capacitance touch screen includes a plurality of touch switches and a plurality of self-capacitance electrodes, where the self-capacitance electrodes are distributed in an array and one self-capacitance electrode corresponds to one touch switch; and
the touch scanning lines are used for sending touch scanning signals to the touch switch so as to control the on or off of the inside of the touch switch;
the plurality of longitudinal induction lines are arranged along the longitudinal direction and used for enabling the self-capacitance electrodes in the same column to output longitudinal induction signals, and the self-capacitance electrodes in the same column are connected through the touch switch;
the plurality of transverse induction lines are used for outputting transverse induction signals for the self-capacitance electrodes in the same row and switching on the self-capacitance electrodes in the same row through the touch switches;
the longitudinal induction lines and the transverse induction lines are mutually communicated to form a grid shape, and the touch scanning lines are respectively insulated from the longitudinal induction lines and the transverse induction lines.
As shown in fig. 4, the touch driving method of the self-capacitance touch screen includes:
step 1: the driving IC sends a touch scanning signal to the touch switch through the touch scanning line so as to switch on the inside of the touch switch, and the longitudinal sensing line and the transverse sensing line switch on the self-capacitance electrode through the touch switch;
step 2: the driving IC sends a touch driving signal to the self-capacitance electrode through the longitudinal induction line and/or the transverse induction line;
and step 3: after the self-capacitance electrode is touched by a finger, outputting a longitudinal sensing signal to a driving IC through the longitudinal sensing line and outputting a transverse sensing signal to the driving IC through the transverse sensing line;
and 4, step 4: the driving IC compares all the longitudinal induction signals, takes the longitudinal induction signal with the maximum signal intensity as a required longitudinal induction signal to calculate the transverse position information of the self-capacitance electrode touched by the finger, and compares all the transverse induction signals, takes the transverse induction signal with the maximum signal intensity as a required transverse induction signal to calculate the longitudinal position information of the self-capacitance electrode touched by the finger.
In the step 2, the driving IC only needs to send the touch driving signal to the self-capacitance electrode through the longitudinal sensing line or the transverse sensing line to charge the self-capacitance electrode, and certainly, the driving IC sends the touch driving signal to the self-capacitance electrode through the longitudinal sensing line and the transverse sensing line simultaneously to charge the self-capacitance electrode; moreover, since all the longitudinal sensing lines and all the transverse sensing lines are mutually connected, the driving IC only needs to output a touch driving signal through one longitudinal sensing line or one transverse sensing line, and all the self-capacitance electrodes corresponding to the turned-on touch switches can receive the touch driving signal to charge.
In the step 4, since there is a loss in the process of transmitting the vertical sensing signal and the horizontal sensing signal to the driving IC, and the longer the transmission path is, the greater the loss is, the smaller the signal intensity reaching the driving IC, and in the grid-shaped transmission network formed by the vertical sensing line and the horizontal sensing line, the transmission path of the vertical sensing line and the horizontal sensing line corresponding to the self-capacitance electrode touched by the finger is the shortest and the loss is the smallest, the signal intensity is the largest among all the vertical sensing signals and the horizontal reaction signals reaching the driving IC.
Preferably, the longitudinal sensing lines are arranged between the self-capacitance electrodes of the adjacent columns at intervals, and the transverse sensing lines are arranged between the self-capacitance electrodes of the adjacent rows at intervals, so as to be integrated in an array substrate of the display panel to form the in-cell touch display panel. The embedded touch display panel adopts time-sharing driving, 1s time is divided into two parts, one part of time is used for display driving, the other part of time is used for touch driving, during the display driving, the longitudinal induction lines are also used as display data lines of the array substrate, the self-capacitance electrodes are also used as pixel electrodes of the array substrate, the touch scanning lines are also used as display scanning lines of the array substrate, and the touch switches are also used as display switches of the array substrate; first, the driving IC transmits a display scan signal to the display switch through the display scan line to turn on the inside of the display switch, the display data line turns on the pixel electrode through the display switch, and then the driving IC transmits a display driving signal to the pixel electrode through the display data line, and the lateral sensing line is turned off during display driving without any operation.
The touch scan line is preferably in a lateral direction.
In an embodiment, as shown in fig. 1, the touch switches corresponding to the self-capacitance electrodes in the same row are simultaneously controlled by the same touch scan line, the touch scan lines are arranged between the self-capacitance electrodes in the adjacent rows at intervals, and the touch switches are also distributed in an array.
The distribution of the touch scanning lines and the touch switches of the self-capacitance touch screen with the structure is consistent with that of the display scanning lines and the display switches in the array substrate, so that the self-capacitance touch screen is conveniently integrated in the array substrate of the display panel to form an embedded touch display panel.
In another embodiment, as shown in fig. 2, one touch switch is controlled by one touch scan line, and the touch switches corresponding to the self-capacitance electrodes in the same row are staggered in the transverse direction.
The distribution of the touch scanning lines and the touch switches of the self-capacitance touch screen with the structure is different from the distribution of the display scanning lines and the display switches in the array substrate, so that the self-capacitance touch screen is difficult to integrate in the array substrate of the display panel and is preferably used as an external-hanging touch screen.
The touch switch is a TFT switch, the touch scanning line is connected to the grid electrode of the TFT switch, the longitudinal sensing line and the transverse sensing line are connected to the source electrode of the TFT switch, and the self-capacitance electrode is connected to the drain electrode of the TFT switch.
The self-capacitance touch screen can realize two-dimensional positioning, and can be embedded in an array substrate of a display panel to form an embedded touch display panel.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is specific and detailed, but the invention can not be understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by adopting the equivalent substitution or equivalent transformation should fall within the protection scope of the present invention.
Claims (9)
1. A self-capacitance touch screen is characterized by comprising a plurality of touch switches and a plurality of self-capacitance electrodes, wherein the self-capacitance electrodes are distributed in an array manner, and one self-capacitance electrode corresponds to one touch switch; and
the touch scanning lines are used for sending touch scanning signals to the touch switch so as to control the on or off of the inside of the touch switch;
the plurality of longitudinal induction lines are arranged along the longitudinal direction and used for enabling the self-capacitance electrodes in the same column to output longitudinal induction signals, and the self-capacitance electrodes in the same column are connected through the touch switch;
the plurality of transverse induction lines are used for outputting transverse induction signals for the self-capacitance electrodes in the same row and switching on the self-capacitance electrodes in the same row through the touch switches;
the longitudinal induction lines and the transverse induction lines are mutually communicated to form a grid shape, and the touch scanning lines are respectively insulated from the longitudinal induction lines and the transverse induction lines.
2. The self-capacitance touch screen of claim 1, wherein the longitudinal sensing lines are spaced between self-capacitance electrodes of adjacent columns, and the transverse sensing lines are spaced between self-capacitance electrodes of adjacent rows.
3. The self-capacitance touch screen of claim 1, wherein the touch scan line is in a lateral direction.
4. The self-capacitance touch screen according to any one of claims 1-3, wherein the touch switches corresponding to the self-capacitance electrodes in the same row are simultaneously controlled by the same touch scan line.
5. The self-capacitance touch screen according to claim 4, wherein the touch scan lines are arranged between the self-capacitance electrodes of adjacent rows at intervals, and the touch switches are also distributed in an array.
6. A self-capacitance touch screen according to any one of claims 1 to 3, wherein a touch switch is independently controlled by a touch scan line.
7. The self-capacitance touch screen of claim 6, wherein the touch switches corresponding to the self-capacitance electrodes in the same row are staggered in the transverse direction.
8. The self-capacitance touch screen of claim 1, wherein the touch switch is a TFT switch.
9. An in-cell touch display panel comprising the self-capacitive touch screen of any one of claims 1-8.
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| CN201921235602.XU CN210155648U (en) | 2019-08-01 | 2019-08-01 | Self-capacitance touch screen and embedded touch display panel |
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| CN201921235602.XU CN210155648U (en) | 2019-08-01 | 2019-08-01 | Self-capacitance touch screen and embedded touch display panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110489020A (en) * | 2019-08-01 | 2019-11-22 | 信利光电股份有限公司 | A kind of self-capacitance touch screen and its touch driving method and embedded touch display panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110489020A (en) * | 2019-08-01 | 2019-11-22 | 信利光电股份有限公司 | A kind of self-capacitance touch screen and its touch driving method and embedded touch display panel |
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