CN106775176B - Self-contained touch display module, display driving method and touch display device - Google Patents
Self-contained touch display module, display driving method and touch display device Download PDFInfo
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- CN106775176B CN106775176B CN201710078759.5A CN201710078759A CN106775176B CN 106775176 B CN106775176 B CN 106775176B CN 201710078759 A CN201710078759 A CN 201710078759A CN 106775176 B CN106775176 B CN 106775176B
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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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- 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
-
- 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
Abstract
The invention provides a self-contained touch display module, a display driving method and a touch display device. The self-contained touch display module comprises a grid drive circuit, a grid line and a data line; a pixel electrode is arranged in a pixel area defined by the grid line and the data line; the pixel electrode is used for performing touch sensing in a touch time period included in each display period; the self-contained touch display module also comprises a data driving unit; the data driving unit is connected with the data lines and used for sending touch scanning signals to the data lines in the touch time period included in each display period. According to the invention, the pixel electrodes are multiplexed into the touch electrodes, and the data lines are multiplexed into the touch wires, so that higher touch precision can be achieved, the touch wires do not need to be additionally added, the transmittance of the liquid crystal display panel can be improved, and the array yield can be improved.
Description
Technical Field
The invention relates to the technical field of touch display, in particular to a self-contained touch display module, a display driving method and a touch display device.
Background
The conventional embedded touch screen is realized by dividing a common electrode into M × N squares, wherein M and N are positive integers, each square is used as a touch sensor, the touch sensors are connected to a driving chip through M × N touch wires, the driving chip outputs common voltage to the touch sensors to control display during each frame of display, and the driving chip outputs high-frequency touch scanning signals to the touch sensors to detect touch positions after each frame of display is finished.
Disclosure of Invention
The invention mainly aims to provide a self-contained touch display module, a display driving method and a touch display device, and solves the problems that the transmittance of a display panel is reduced, the array yield is reduced, a touch sensor cannot be matched with a pixel electrode in size, and higher touch precision cannot be achieved due to the fact that an additional touch wire needs to be added to the existing self-contained touch display module.
In order to achieve the above object, the present invention provides a self-contained touch display module, which includes a gate driving circuit, a gate line and a data line; a pixel electrode is arranged in a pixel area defined by the grid line and the data line; the pixel electrode is used for performing touch sensing in a touch time period included in each display period; the self-contained touch display module also comprises a data driving unit;
the data driving unit is connected with the data lines and used for sending touch scanning signals to the data lines in the touch time period included in each display period.
In practice, the self-contained touch display module further comprises: and the touch detection unit is connected with the data line and used for detecting a touch sensing signal fed back by the data line in the touch time period and detecting a touch event according to the touch sensing signal.
In practice, the data driving unit is further configured to send a corresponding data voltage to the data line in a display charging period included in each display period;
in each display period, the touch time period and the display charging time period are not overlapped.
In implementation, the self-contained touch display module is characterized by further comprising a display substrate and a common electrode; the grid line, the data line and the pixel electrode are arranged on the display substrate;
the common electrode is positioned between the pixel electrode and the display substrate.
The invention also provides a self-contained touch display driving method which is applied to the self-contained touch display module, each frame time comprises a plurality of display periods, and in each display period, the grid driving circuit scans the corresponding grid line; each display cycle comprises a touch time period; the self-contained touch display driving method comprises the following steps:
and in the touch time period, the data driving unit sends a touch scanning signal to the data line.
In practice, the self-contained touch display driving method of the present invention further comprises: and in the touch time period, the touch detection unit detects a touch sensing signal fed back by the data line and detects a touch event according to the touch sensing signal.
In implementation, each display cycle further comprises a display charging time period, and in each display cycle, the touch time period and the display charging time period are not overlapped; the self-contained touch display driving method further comprises: in the display charging period, the data driving unit transmits a corresponding data voltage to the data line.
In practice, the self-contained touch display driving method of the present invention further comprises: in each display period, the gate driving circuit scans the corresponding row of gate lines to control the conduction of the plurality of thin film transistors connected with the row of gate lines and to control the connection of the pixel electrodes in the row with the corresponding column of data lines.
The invention also provides a touch display device which comprises the self-contained touch display module.
Compared with the prior art, the self-contained touch display module, the display driving method and the touch display device have the advantages that the pixel electrodes are multiplexed into the touch electrodes, the data lines are multiplexed into the touch wires (the touch wires are used for sending touch scanning signals and receiving touch sensing signals sensed by the touch electrodes), the problem that the conventional self-contained touch display module cannot achieve the size of the pixel electrodes of the touch sensor and cannot achieve higher touch precision is solved, the data lines are multiplexed into the touch wires, no additional touch wires are required to be added, and the problems that the transmittance of a liquid crystal display panel is reduced and the yield of Array (Array) is reduced due to the fact that the additional touch wires are required in the prior art are solved.
Drawings
Fig. 1 is a structural diagram of a self-contained touch display module according to an embodiment of the invention;
FIG. 2 is a block diagram of a self-contained touch display module according to another embodiment of the present invention;
fig. 3 is a timing diagram illustrating an operation of the self-contained touch display module according to the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The self-contained touch display module comprises a grid drive circuit, a grid line and a data line; a pixel electrode is arranged in a pixel area defined by the grid line and the data line;
the pixel electrode is used for performing touch sensing in a touch time period included in each display period; the self-contained touch display module also comprises a data driving unit;
the data driving unit is connected with the data lines and used for sending touch scanning signals to the data lines in the touch time period included in each display period.
In actual operation, the gate driving circuit is used for scanning the mth row of gate lines in the mth display period of each frame time; m is a positive integer;
the self-contained touch display module in the embodiment of the invention reuses the pixel electrodes as the touch electrodes, reuses the data lines as the touch wires (the touch wires are wires for sending touch scanning signals and receiving touch sensing signals sensed by the touch electrodes), solves the problem that the conventional self-contained touch display module cannot realize the size of the pixel electrodes of the touch sensor and cannot achieve higher touch precision, reuses the data lines as the touch wires, does not need to additionally add the touch wires, and solves the problems that the transmittance of the liquid crystal display panel is reduced and the array yield is reduced due to the fact that the touch wires need to be additionally added in the prior art.
As shown in fig. 1, five rows of gate lines and seven columns of data lines are taken as an example, but not limited thereto. The grid lines marked as G1, G2, G3 and G4 are a first row of grid lines, a second row of grid lines, a third row of grid lines and a fourth row of grid lines in sequence; reference numerals S1, S2, S3, S4, S5, S6 and S7 denote a first column data line, a second column data line, a third column data line, a fourth column data line, a fifth column data line, a sixth column data line and a seventh column data line in sequence; the label is TFT, and the label is PE pixel electrode;
defining a pixel area by the five rows of grid lines and the seven lines of data lines;
each pixel region is internally provided with a pixel electrode and a thin film transistor;
the grid electrode of the thin film transistor is connected with the grid line, the source electrode of the thin film transistor is connected with the data line, and the drain electrode of the thin film transistor is connected with the pixel electrode;
the pixel electrode is used for performing touch sensing in a touch time period included in each display period;
as shown in fig. 1, the self-contained touch display module further includes a data driving unit 11;
the data driving unit 11 is respectively connected to the first column data line S1, the second column data line S2, the third column data line S3, the fourth column data line S4, the fifth column data line S5, the sixth column data line S6, and the seventh column data line S7, and configured to send touch scan signals to the first column data line S1, the second column data line S2, the third column data line S3, the fourth column data line S4, the fifth column data line S5, the sixth column data line S6, and the seventh column data line S7 in a touch time period included in each display cycle.
Specifically, the self-contained touch display module further comprises: and the touch detection unit is connected with the data line and used for detecting a touch sensing signal fed back by the data line in the touch time period and detecting a touch event according to the touch sensing signal.
In actual operation, the self-contained touch display module further comprises a touch detection unit which feeds back a touch sensing signal sensed by the pixel electrode in a touch time period through the data line and detects a touch event according to the touch sensing signal.
The touch detection unit detects a touch event, namely the touch detection unit judges whether touch exists according to a touch sensing signal fed back by the data line in the touch time period, and detects a touch position when the touch is judged to exist.
As shown in fig. 2, on the basis of fig. 1, the self-contained touch display module further includes a touch detection unit 12,
the touch detection unit 12 is respectively connected to the first column data line S1, the second column data line S2, the third column data line S3, the fourth column data line S4, the fifth column data line S5, the sixth column data line S6, and the seventh column data line S7, and is configured to receive a touch sensing signal sensed by a pixel electrode fed back by the data lines in a touch time period to detect a touch event.
Specifically, the data driving unit is further configured to send a corresponding data voltage to the data line in a display charging period included in each display period;
in each display period, the touch time period and the display charging time period are not overlapped.
In a specific implementation, the data driving unit is further configured to transmit the data voltage for display driving during the display charging period.
In practical operation, the self-contained touch display module further comprises a display substrate and a common electrode;
the grid line, the data line and the pixel electrode are arranged on the display substrate;
the common electrode is positioned between the pixel electrode and the display substrate. In order to avoid the influence of the capacitance shielding of the pixel electrode by the common electrode on the touch accuracy, it is necessary to avoid the common electrode being disposed between the pixel electrode and the display surface.
When the embodiment of the present invention shown in fig. 2 is in operation, as shown in fig. 3, G1, G2, G3, G4 are turned on line by line;
each display period T includes a data voltage holding time T0, a touch time period T1, and a display charging time period T2;
at each of the display periods, the display period,
in the touch time period t1, the data driving unit sends a high-frequency touch scanning signal to the pixel electrode through the data line to determine whether a touch exists and detect a touch position;
in the display charging period t2, the data driving unit transmits a data voltage to the pixel electrode through the data line to perform display charging;
in fig. 3, the data voltage holding time t0 is the time from when a certain row of gate lines is turned off to when the row of data voltage output is turned off, and is used to prevent the erroneous charging caused by the delay caused by the data voltage and the too long gate line.
The first gate scan signal transferred to G1, the second gate scan signal transferred to G2, the third gate scan signal transferred to G3, the fourth gate scan signal transferred to G4, and the signal transferred to S1 are shown in fig. 3.
The self-contained touch display driving method is applied to the self-contained touch display module, each frame time comprises a plurality of display periods, and in each display period, the grid driving circuit scans the corresponding grid line; each display cycle comprises a touch time period; the self-contained touch display driving method comprises the following steps:
and in the touch time period, the data driving unit sends a touch scanning signal to the data line.
The self-contained touch display driving method in the embodiment of the invention reuses the pixel electrodes as the touch electrodes, reuses the data lines as the touch wires (the touch wires are wires for sending touch scanning signals and receiving touch sensing signals sensed by the touch electrodes), solves the problem that the conventional self-contained touch display module cannot achieve the size of the pixel electrodes of the touch sensor and cannot achieve higher touch precision, reuses the data lines as the touch wires, does not need to additionally add the touch wires, and solves the problem that the transmittance of the liquid crystal display panel is reduced and the array yield is reduced due to the fact that the touch wires need to be additionally added in the prior art.
The self-contained touch display driving method provided by the embodiment of the invention further comprises the following steps: and in the touch time period, the touch detection unit detects a touch sensing signal fed back by the data line and detects a touch event according to the touch sensing signal.
Specifically, each display cycle further comprises a display charging time period, and in each display cycle, the touch time period and the display charging time period are not overlapped; the self-contained touch display driving method provided by the embodiment of the invention further comprises the following steps: in the display charging period, the data driving unit transmits a corresponding data voltage to the data line.
Specifically, the self-contained touch display driving method according to the embodiment of the present invention further includes: in each display period, the gate driving circuit scans the corresponding row of gate lines to control the conduction of the plurality of thin film transistors connected with the row of gate lines and to control the connection of the pixel electrodes in the row with the corresponding column of data lines.
The touch display device comprises the self-contained touch display module.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A self-contained touch display module comprises a grid drive circuit, a grid line and a data line; a pixel electrode is arranged in a pixel area defined by the grid line and the data line; the pixel electrode is used for touch induction in a touch time period included in each display period; the self-contained touch display module also comprises a data driving unit;
the data driving unit is connected with all the data lines and used for sending touch scanning signals to all the data lines in a touch time period included in each display period;
self-contained touch display module assembly still include: and the touch detection unit is respectively connected with the corresponding pixel electrodes through all the data lines and is used for detecting touch induction signals fed back by all the data lines in the touch time period and detecting touch events according to the touch induction signals.
2. The self-contained touch display module of claim 1, wherein the data driving unit is further configured to send a corresponding data voltage to the data lines during a display charging period included in each display cycle;
in each display period, the touch time period and the display charging time period are not overlapped.
3. The self-contained touch display module of claim 1, further comprising a display substrate and a common electrode;
the grid line, the data line and the pixel electrode are arranged on the display substrate;
the common electrode is positioned between the pixel electrode and the display substrate.
4. A self-contained touch display driving method is applied to the self-contained touch display module set as claimed in any one of claims 1 to 3, wherein each frame time comprises a plurality of display periods, and in each display period, a gate driving circuit scans a corresponding gate line; each display cycle comprises a touch time period; the self-contained touch display driving method comprises the following steps:
in the touch time period, the data driving unit sends touch scanning signals to all the data lines, and the touch detection unit detects touch sensing signals fed back by all the data lines and detects touch events according to the touch sensing signals.
5. The self-contained touch display driving method according to claim 4, wherein each display cycle further comprises a display charging period, and in each display cycle, the touch period and the display charging period do not overlap; the self-contained touch display driving method further comprises: in the display charging period, the data driving unit transmits a corresponding data voltage to the data line.
6. The self-contained touch display driving method of claim 4, further comprising: in each display period, the grid driving circuit scans the corresponding row grid line to control the conduction of a plurality of thin film transistors connected with the corresponding row grid line and control the connection of the pixel electrodes positioned in the corresponding row and the corresponding column data lines respectively.
7. A touch display device comprising the self-contained touch display module of any one of claims 1-3.
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| CN201710078759.5A CN106775176B (en) | 2017-02-14 | 2017-02-14 | Self-contained touch display module, display driving method and touch display device |
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| CN201710078759.5A CN106775176B (en) | 2017-02-14 | 2017-02-14 | Self-contained touch display module, display driving method and touch display device |
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| CN106775176B true CN106775176B (en) | 2020-06-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102377960B1 (en) | 2017-08-04 | 2022-03-22 | 엘지디스플레이 주식회사 | Display device |
| CN107452320B (en) * | 2017-09-25 | 2021-01-26 | 京东方科技集团股份有限公司 | Level shift circuit, display device, level shift circuit control method, and driving circuit of display device |
| CN107728367B (en) * | 2017-11-30 | 2020-07-28 | 武汉天马微电子有限公司 | Display panel driving method, display panel and display device |
| CN108508640B (en) | 2018-03-30 | 2021-03-02 | 京东方科技集团股份有限公司 | Display substrate, display device and wireless charging method |
| CN109375839B (en) * | 2018-12-03 | 2020-06-30 | 武汉华星光电半导体显示技术有限公司 | Touch screen and display device |
| 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 |
| CN111429802A (en) * | 2020-03-23 | 2020-07-17 | 武汉华星光电半导体显示技术有限公司 | Display device and electronic apparatus |
| TWI761224B (en) * | 2021-06-07 | 2022-04-11 | 力領科技股份有限公司 | Touch display driving method and touch display system using the same |
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| CN103500747A (en) * | 2013-09-30 | 2014-01-08 | 京东方科技集团股份有限公司 | Array substrate, array substrate driving method and display device |
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