CN108762560B - Touch panel, control method thereof and display device - Google Patents
Touch panel, control method thereof and display device Download PDFInfo
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- CN108762560B CN108762560B CN201810515367.5A CN201810515367A CN108762560B CN 108762560 B CN108762560 B CN 108762560B CN 201810515367 A CN201810515367 A CN 201810515367A CN 108762560 B CN108762560 B CN 108762560B
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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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- 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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- Liquid Crystal Display Device Control (AREA)
Abstract
The invention provides a touch panel, a control method thereof and a display device, and belongs to the technical field of display. The touch panel of the present invention includes: the display device comprises a plurality of grid lines, a plurality of data lines, a grid driving circuit connected with the grid lines, a touch unit connected with the grid lines and the data lines, a display state detection unit, a data selector and a plurality of switch units; wherein the switching unit is connected between the gate line and the gate driving circuit; the display state detection unit is used for detecting the state of the touch panel; the data selector is connected with the switch unit and the display state detection unit, and is used for controlling the switch unit to be turned on through the first power voltage and outputting the second power voltage to the grid line when the display state detection unit detects that the touch panel is in a dormant state, so that the touch unit is turned off.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a touch panel, a control method of the touch panel and a display device of the touch panel.
Background
In the current high-resolution Touch and Display Drive Integrated (TDDI) product, due to wiring limitation, the distance from the edge of a Black Matrix (BM) to the grid electrode of a Thin Film Transistor (TFT) is short, and in addition, the color film alignment precision is influenced, so that the edge of a part of the product black matrix is overlapped with the grid electrode of the thin film transistor, the shading effect of the black matrix on the thin film transistor is poor, and the thin film transistor is sensitive to illumination.
Usually, when the display panel is in a Sleep state (i.e., the display module is in a Sleep state), in order to save power consumption, most circuits of the display module are in an off state, such as a gate driver circuit (GOA circuit), so that the gate scan signal is in a Floating state, but the measured gate scan signal is 0-3V, i.e., the thin film transistor connected to the gate line is not turned off; under the strong light irradiation of the surface of the touch panel, current carriers in a channel of the thin film transistor are activated, leakage current is increased, a modulation signal on a data line charges a pixel capacitor (one polar plate is a pixel electrode, the other polar plate is a common electrode, and the common electrode is reused as the touch electrode), so that the voltage on the touch electrode is changed, the touch signal quantity is obviously increased (the signal quantity of a part of areas can reach more than 2000 and is larger than that of fingers in touch), and at the moment, if the fingers block a light path in touch, the signal quantity is reduced on the contrary, so that the double-click awakening operation of the touch panel cannot be identified.
Disclosure of Invention
The present invention is directed to at least one of the technical problems in the prior art, and provides a touch panel, a control method thereof and a display device capable of improving a double-click wake-up performance of the touch panel.
The technical solution to solve the technical problem of the present invention is a touch panel, including: the touch control circuit comprises a plurality of grid lines, a plurality of data lines, a grid drive circuit connected with the grid lines and a touch control unit connected with the grid lines and the data lines; the touch panel further includes: a display state detection unit, a data selector and a plurality of switch units; wherein the content of the first and second substances,
the switch unit is connected between the grid line and the grid drive circuit;
the display state detection unit is used for detecting the state of the touch panel;
the data selector is connected with the switch unit and the display state detection unit, and is used for controlling the switch unit to be turned on through a first power voltage and outputting a second power voltage to the grid line when the display state detection unit detects that the touch panel is in a dormant state, so that the touch unit is turned off.
Preferably, the data selector is further configured to control the switch unit to be turned off by a second power voltage when the display state detection unit detects that the touch panel is in the display state.
Preferably, the touch panel further includes a display state control unit;
the display state control unit is connected with the gate drive circuit and the display state detection unit and used for outputting a control signal for controlling the state of the touch panel to the gate drive circuit, so that the display state control unit can acquire the state of the touch panel according to the control signal.
Preferably, the switching unit includes a switching transistor; wherein the content of the first and second substances,
the first pole of the switching transistor is connected with the second power supply voltage end of the data selector, the second pole of the switching transistor is connected with the grid line, and the control pole of the switching transistor is connected with the output end of the data selector.
Preferably, the data selector includes: the NOR gate comprises a NOT gate, a first AND gate, a second AND gate and a NOR gate; wherein the content of the first and second substances,
the input end of the NOT gate is used as the input end of the data selector and is connected with the display state detection unit and the first input end of the second AND gate, and the output end of the NOT gate is connected with the second input end of the first AND gate;
a first input end of the first AND gate is used as a second power supply voltage end of the data selector; a second input end of the second AND gate is used as a first power supply voltage end of the data selector;
and the first input end of the NOR gate is connected with the output end of the first AND gate, the second input end of the NOR gate is connected with the output end of the second AND gate, and the output end of the NOR gate is used as the output end of the data selector.
Preferably, the gate lines and the data lines are arranged in a crossing manner, and the touch units are defined at the crossing positions; the touch unit includes: a pixel switching transistor and a pixel capacitance; wherein the content of the first and second substances,
the first polar plate of the pixel capacitor is a pixel electrode, the second polar plate is a touch electrode and is reused as a common electrode;
the first pole of the pixel switch transistor is connected with the data line, the second pole of the pixel switch transistor is connected with the first pole plate of the pixel capacitor, and the control pole of the pixel switch transistor is connected with the grid line; the second polar plate of the pixel capacitor receives a common voltage signal in a display stage of the touch panel, and receives a touch driving signal in a touch stage.
The technical solution to solve the technical problem of the present invention is a control method of the touch panel, including:
detecting the state of the touch panel by a display state detection unit;
when the display state detection unit detects a control signal for turning off the touch panel in a dormant state, the display state detection unit controls the switch unit to be turned on through the first power voltage, and outputs the second power voltage to the grid line so as to turn off the touch unit.
Preferably, the method further comprises:
and when the display state detection unit detects that the touch panel is in the display state, the switch unit is controlled to be closed through a second power supply voltage.
Preferably, the touch panel further includes a display state control unit connected to the gate driving circuit;
the step of detecting the state of the touch panel by the display state detection unit specifically includes:
and acquiring the state of the touch panel by detecting a control signal which is output to the gate drive circuit by the display state control unit and is used for controlling the state of the touch panel.
The technical solution to solve the technical problem of the present invention is a display device, which includes the above-mentioned touch panel.
Drawings
Fig. 1 is a schematic structural diagram of a touch panel in a sleep state according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a display state of a touch panel according to embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a touch panel in a sleep state according to embodiment 2 of the present invention;
fig. 4 is a schematic structural diagram of a display state of a touch panel according to embodiment 2 of the present invention;
fig. 5 is a schematic diagram of a switching transistor as a switching unit of the touch panel according to embodiment 2 of the invention;
fig. 6 is a schematic structural diagram of a data selector of a touch panel in embodiment 2 of the invention.
Wherein the reference numerals are: 1. a gate drive circuit; 2. a touch unit; 3. a data selector; 4. a display state detection unit; 5. a switch unit; 6. a display state control unit; t1, a switching transistor; t2, pixel switching transistor; C. a pixel capacitance; AVDD, a first supply voltage terminal; AVEE and a second power supply voltage terminal.
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:
as shown in fig. 1, the present embodiment provides a touch panel, including: a plurality of Gate lines Gate (also shown as Gate 1-Gate), a plurality of Data lines Data (only Data1 is shown in the figure), a Gate driving circuit 1 connected with the Gate lines Gate, and a touch unit 2 connected with both the Gate lines Gate and the Data lines Data; specifically, the touch panel in the present embodiment further includes a display state detection unit 4, a data selector 3, and a plurality of switch units 5; the switching unit 5 is connected between the Gate line Gate and the Gate driving circuit 1; a display state detection unit 4 for detecting a state of the touch panel; the data selector 3 is connected to the switch unit 5 and the display state detection unit 4, and configured to control the switch unit 5 to be turned on by the first power voltage when the display state detection unit detects that the touch panel is in the sleep state, and output the second power voltage to the Gate line Gate, so as to turn off the touch unit 2.
Because the data selector 3 in the touch panel of this embodiment can control the switch unit 5 to be turned on by the first power voltage when the display state detection unit detects that the touch panel is in the sleep state, and output the second power voltage to the Gate line Gate, so as to turn off the touch unit 2, thereby effectively avoiding the problem that when the touch panel is in the sleep state, the Gate driving circuit 1 is turned off and does not output signals to the Gate line Gate connected thereto, so that the Gate line Gate is in the floating state, and the touch panel is under strong light irradiation, so that the touch unit 2 works to generate a larger touch signal amount, which causes the problem that the touch panel cannot be awakened by double-click.
As shown in fig. 2, when the display state detection unit detects that the touch panel is in the display state, the data selector 3 in the touch substrate of this embodiment may further control the switch unit 5 to turn off through the second power voltage, so as to prevent the second power voltage from affecting the Gate scanning signal input by the Gate driving circuit 1 to the Gate line Gate, and thus affecting the normal operation of the touch panel.
Accordingly, the present embodiment provides a method for controlling a touch panel, including:
the state of the touch panel being turned off is detected by the display state detection unit 4.
When the display state detection unit 4 detects a control signal for turning off the touch panel in a dormant state, the display state detection unit controls the display state detection unit to be turned on by the first power supply voltage and the switch unit 5, and outputs the second power supply voltage to the grid line Gate so as to turn off the touch unit 2, thereby effectively avoiding the problem that when the touch panel is in the dormant state, the grid drive circuit 1 is turned off and does not output signals to the grid line Gate connected with the grid drive circuit, so that the grid line Gate is in a floating state, and the touch panel is irradiated by strong light to cause the touch unit 2 to work to generate a larger touch signal amount and cause that the touch panel cannot be awakened by double click.
In order to make the touch panel structure in this embodiment more clear, the touch panel structure in this embodiment is specifically described in embodiment 2.
Example 2:
as shown in fig. 3, the present embodiment provides a touch panel, including: a plurality of Gate lines Gate, a plurality of Data lines Data, a Gate driving circuit 1 connected with the Gate lines Gate, and a touch unit 2 connected with both the Gate lines Gate and the Data lines Data; specifically, the touch panel in this embodiment further includes: a display state control unit 6, a display state detection unit 4, a data selector 3, and a plurality of switch units 5; the switching unit 5 is connected between the Gate line Gate and the Gate driving circuit 1; the display state control unit 6 is connected to the gate driving circuit 1 and the display state detection unit 4, and is configured to output a control signal for controlling the state of the touch panel to the gate driving circuit 1, so that the display state control unit 6 obtains the state of the touch panel according to the control signal; the data selector 3 is connected to the switch unit 5 and the display state detection unit 4, and configured to control the switch unit 5 to be turned on by the first power voltage when the display state detection unit 4 detects that the touch panel is in the sleep state, and output the second power voltage to the Gate line Gate, so as to turn off the touch unit 2.
Since the display state control unit 6 in the touch substrate of this embodiment is capable of outputting a control signal for controlling the state of the touch panel to the gate driving circuit 1 according to the display state detection unit 4, determining the current state of the touch panel, and when determining that the touch panel is currently in the sleep state according to the control signal, the switching unit 5 may be controlled to be turned on by the first power voltage using the data selector 3, and the second power voltage may be output to the Gate line Gate, so as to turn off the touch unit 2, thereby effectively avoiding that the Gate driving circuit 1 is turned off and does not output signals to the Gate lines Gate connected with the Gate driving circuit when the touch panel is in a dormant state, the grid lines Gate are in a floating state, and the touch panel is under strong light irradiation, so that the touch unit 2 works to generate a larger touch signal quantity, and the problem that the touch panel cannot be awakened by double-click is caused.
As shown in fig. 4, the data selector 3 in the touch substrate of this embodiment may further control the switch unit 5 to be turned off by the second power voltage when the display state detection unit detects that the touch panel is in the display state, so as to prevent the second power voltage from affecting the Gate scanning signal input to the Gate line Gate by the Gate driving circuit 1 and affecting the normal operation of the touch panel.
In this embodiment, for the high PPI of the Gate line Gate touch panel, it is preferable that the Gate line Gate and the Data line Data are arranged in a crossing manner, and a touch unit 2 is arranged at each crossing position, where the touch unit 2 includes: a pixel switching transistor T2 and a pixel capacitance C; the first polar plate of the pixel capacitor C is a pixel electrode, the second polar plate is a touch electrode and is reused as a common electrode; a first electrode of the pixel switch transistor T2 is connected to the Data line Data, a second electrode is connected to the first electrode plate of the pixel capacitor C, and a control electrode is connected to the Gate line Gate; the second polar plate of the pixel capacitor C receives a common voltage signal in the display stage of the touch panel, and receives a touch driving signal in the touch stage.
It should be understood that, when the touch panel is a liquid crystal panel in the present embodiment, the touch unit 2 can be reused as a pixel unit. That is, liquid crystal is filled between the pixel electrode and the common electrode, and the deflection angle of the liquid crystal is controlled by controlling the voltage loaded on the pixel electrode and the common electrode, so as to realize the display of different gray scales.
As shown in fig. 5, the switching unit 5 in the present embodiment includes a switching transistor T1; the first pole of the switching transistor T1 is connected to the second power voltage terminal AVEE of the data selector 3, the second pole is connected to the Gate line Gate, and the control pole is connected to the output terminal of the data selector 3. As shown in fig. 6, the data selector 3 includes: an NOT gate, a first AND gate AND1, a second AND gate AND2, AND a NOR gate OR; the input end of the NOT gate NOT is connected with the display state detection unit 4 AND the first input end of the second AND gate AND2, AND the output end is connected with the second input end of the first AND gate AND 1; a first input terminal of the first AND gate AND1 serves as a second power supply voltage terminal AVEE of the data selector 3; a second input terminal of the second AND gate AND2 serves as a first power supply voltage terminal AVDD of the data selector 3; the nor gate OR has a first input terminal connected to the output terminal of the first AND gate AND1, a second input terminal connected to the output terminal of the second AND gate AND2, AND an output terminal serving as the output terminal of the data selector 3.
The control method of the touch panel in this embodiment is described by taking an example in which the switching transistor is an N-type thin film transistor, the first power supply voltage is a high power supply voltage, and the second power supply voltage is a low power supply voltage; of course, when the switching transistor is a P-type thin film transistor, the first power supply voltage may be a low power supply voltage, and the second power supply voltage may be a high power supply voltage.
The control method of the touch panel of the embodiment specifically includes the following steps:
the control signal output to the gate drive circuit 1 by the display state control unit 6 is detected by the display state detection unit 4.
When the control signal is detected to be a signal (e.g. 11H) for controlling the sleep state of the touch panel, the input terminal of the data selector 3, i.e., the input terminal SEL of the NOT gate NOT is set to 0, the second input terminal of the second AND gate AND1 is used as the first power supply voltage terminal AVDD of the data selector 3, the gate-controlled switching transistor T1 that outputs the first power supply voltage to the switching transistor T1 is turned on, and outputs the second power voltage to the first pole of the switching transistor T1, and then to the Gate line Gate through the second pole of the switching transistor T1, to control the pixel transistor to be turned off, so as to prevent the Gate driving circuit 1 from turning off and not outputting signals to the Gate line Gate connected thereto when the touch panel is in a sleep state, the grid lines Gate are in a floating state, and the touch panel is under strong light irradiation, so that the touch unit 2 works to generate a larger touch signal quantity, and the problem that the touch panel cannot be awakened by double-click is caused.
When the display state detection unit 4 detects that the control signal output to the gate driving circuit 1 by the display state control unit 6 is a signal (for example, 10H) for controlling the touch panel to be in the display state, the input terminal of the data selector 3, that is, the input terminal SEL of the NOT gate is set to 1, and the output terminal of the nor gate is used as the output terminal of the data selector 3 to output the second power voltage, so that the switching transistor is turned off to prevent the normal display of the touch panel from being affected.
Example 3:
the present embodiment provides a display device, which includes the touch panel of embodiment 1 or 2.
Since the display device in this embodiment includes the touch panel in embodiment 1 or 2, the double-click wake-up function is significantly improved.
The display device may be a liquid crystal display device or an electroluminescent 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, a navigator, and the like.
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 touch panel, comprising: the touch control circuit comprises a plurality of grid lines, a plurality of data lines, a grid drive circuit connected with the grid lines and a touch control unit connected with the grid lines and the data lines; characterized in that, the touch panel further comprises: a display state detection unit, a data selector and a plurality of switch units; wherein the content of the first and second substances,
the switch unit is connected between the grid line and the grid drive circuit;
the display state detection unit is used for detecting the state of the touch panel;
the data selector is connected with the switch unit and the display state detection unit, and is used for controlling the switch unit to be turned on through a first power voltage and outputting a second power voltage to the grid line when the display state detection unit detects that the touch panel is in a dormant state, so that the touch unit is turned off.
2. The touch panel of claim 1, wherein the data selector is further configured to control the switch unit to be turned off by a second power voltage when the display state detection unit detects that the touch panel is in the display state.
3. The touch panel according to claim 1, further comprising a display state control unit;
the display state control unit is connected with the gate drive circuit and the display state detection unit and used for outputting a control signal for controlling the state of the touch panel to the gate drive circuit, so that the display state detection unit can acquire the state of the touch panel according to the control signal.
4. The touch panel according to claim 1, wherein the switching unit includes a switching transistor; wherein the content of the first and second substances,
the first pole of the switching transistor is connected with the second power supply voltage end of the data selector, the second pole of the switching transistor is connected with the grid line, and the control pole of the switching transistor is connected with the output end of the data selector.
5. The touch panel of claim 1, wherein the data selector comprises: the NOR gate comprises a NOT gate, a first AND gate, a second AND gate and a NOR gate; wherein the content of the first and second substances,
the input end of the NOT gate is used as the input end of the data selector and is connected with the display state detection unit and the first input end of the second AND gate, and the output end of the NOT gate is connected with the second input end of the first AND gate;
a first input end of the first AND gate is used as a second power supply voltage end of the data selector; a second input end of the second AND gate is used as a first power supply voltage end of the data selector;
and the first input end of the NOR gate is connected with the output end of the first AND gate, the second input end of the NOR gate is connected with the output end of the second AND gate, and the output end of the NOR gate is used as the output end of the data selector.
6. The touch panel according to claim 1, wherein the gate lines and the data lines are arranged to cross each other, and the touch cells are defined at the crossing positions; the touch unit includes: a pixel switching transistor and a pixel capacitance; wherein the content of the first and second substances,
the first polar plate of the pixel capacitor is a pixel electrode, the second polar plate is a touch electrode and is reused as a common electrode;
the first pole of the pixel switch transistor is connected with the data line, the second pole of the pixel switch transistor is connected with the first pole plate of the pixel capacitor, and the control pole of the pixel switch transistor is connected with the grid line; the second polar plate of the pixel capacitor receives a common voltage signal in a display stage of the touch panel, and receives a touch driving signal in a touch stage.
7. The method for controlling the touch panel according to any one of claims 1 to 6, comprising:
detecting the state of the touch panel by a display state detection unit;
when the display state detection unit detects a control signal for turning off the touch panel in a dormant state, the display state detection unit controls the switch unit to be turned on through the first power voltage, and outputs the second power voltage to the grid line so as to turn off the touch unit.
8. The method of controlling a touch panel according to claim 7, further comprising:
and when the display state detection unit detects that the touch panel is in the display state, the switch unit is controlled to be closed through a second power supply voltage.
9. The method of claim 7, wherein the touch panel further comprises a display state control unit connected to the gate driving circuit;
the step of detecting the state of the touch panel by the display state detection unit specifically includes:
and acquiring the state of the touch panel by detecting a control signal which is output to the gate drive circuit by the display state control unit and is used for controlling the state of the touch panel.
10. A display device characterized by comprising the touch panel according to any one of claims 1 to 6.
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| CN114327113B (en) * | 2020-09-30 | 2024-05-07 | 京东方科技集团股份有限公司 | Display touch device and control method |
| CN112130701B (en) * | 2020-10-22 | 2024-03-08 | 北京京东方光电科技有限公司 | Display touch device and power supply control method |
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| US8144126B2 (en) * | 2007-05-07 | 2012-03-27 | Cypress Semiconductor Corporation | Reducing sleep current in a capacitance sensing system |
| TWI469017B (en) * | 2008-04-02 | 2015-01-11 | Elan Microelectronics Corp | Capacitive touch device and its method for saving power consumption |
| CN101866231B (en) * | 2009-04-14 | 2013-01-30 | 联咏科技股份有限公司 | Control method and related device for detecting touch event in touch panel |
| US9696858B2 (en) * | 2013-07-08 | 2017-07-04 | Synaptics Incorporated | Display device having an integrated sensing device with improved proximity sensing |
| CN106249937B (en) * | 2015-06-05 | 2019-02-26 | 株式会社日本显示器 | Display device and display system with touch detection function |
| WO2017154657A1 (en) * | 2016-03-07 | 2017-09-14 | シャープ株式会社 | Liquid crystal display device with built-in touch sensor, and drive method for the device |
| CN105892118A (en) * | 2016-04-18 | 2016-08-24 | 武汉华星光电技术有限公司 | Mutual capacitance type In-cell display device and driving method thereof |
| CN106569583A (en) * | 2016-11-04 | 2017-04-19 | 惠州Tcl移动通信有限公司 | Double-click awakening screen power supply control method and system based on mobile terminal |
| CN107239169A (en) * | 2017-06-07 | 2017-10-10 | 深圳天珑无线科技有限公司 | A kind of control method and device of touch-screen touch controllable function |
| CN107390934B (en) * | 2017-07-28 | 2021-04-02 | 武汉天马微电子有限公司 | Display panel and display device |
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