CN109375819B - Touch display device and driving method thereof - Google Patents
Touch display device and driving method thereof Download PDFInfo
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- CN109375819B CN109375819B CN201811483195.4A CN201811483195A CN109375819B CN 109375819 B CN109375819 B CN 109375819B CN 201811483195 A CN201811483195 A CN 201811483195A CN 109375819 B CN109375819 B CN 109375819B
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- display panel
- control module
- electrode layer
- touch
- voltage
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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
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
Abstract
The invention provides a touch display device and a driving method thereof. The touch display device comprises a display panel, a touch layer and a control module, wherein the display panel comprises a plurality of data lines arranged at intervals, the touch layer comprises an induction electrode layer, the control module is electrically connected with the induction electrode layer through a detection signal line, when the touch display device is driven, the control module is used for detecting the voltage on the induction electrode layer through the detection signal line, and when the control module detects that the waveform of the voltage on the induction electrode layer has ripples, the control module overturns the polarity of the data voltage input by the plurality of data lines of the display panel, so that the abnormal ripples of the sensing signal on the induction electrode layer can be effectively eliminated, and the touch function is reliably realized.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch display device and a driving method thereof.
Background
With the development of Display technology, flat panel Display devices such as Liquid Crystal Display (LCD) devices and Organic Light Emitting Diode (OLED) Display devices have been replacing Cathode Ray Tube (CRT) Display screens due to their advantages of high image quality, power saving, thin body and wide application range, and are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers and desktop computers, and become the mainstream of Display devices.
Most of the existing liquid crystal display devices in the market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module (backlight module). The liquid crystal display panel operates on the principle that liquid crystal molecules are filled between a Thin Film Transistor Array (TFT Array Substrate) and a color filter (color filter, CF) Substrate, and driving voltages are applied to the two substrates to control the rotation direction of the liquid crystal molecules, so that light of the backlight module is refracted out to generate a picture.
An OLED display device generally uses an Indium Tin Oxide (ITO) pixel electrode and a metal electrode as an anode and a cathode of a device, respectively, and under a certain voltage, electrons and holes are injected from the cathode and the anode to an electron transport layer and a hole transport layer, respectively, and the electrons and the holes migrate to a light emitting layer through the electron transport layer and the hole transport layer, respectively, and meet in the light emitting layer to form excitons and excite light emitting molecules, which emit visible light through radiative relaxation.
With the development of display technology, consumer demand for touch display devices is increasing. Referring to fig. 1, a conventional touch display device generally includes a display panel 100, which may be an LCD and an OLED, and a touch layer 200 disposed on the display panel 100, wherein the touch layer 200 includes a touch electrode layer and a sensing electrode layer disposed opposite to each other, and referring to fig. 2, the touch electrode layer is driven at a specific frequency, and the sensing electrode layer is scanned at a specific frequency, so as to implement a touch function.
For example, referring to fig. 3, when the conventional touch display device displays a point V-band (Dot V Strip) picture, the waveform of the voltage on the sensing electrode layer has obvious ripples, which seriously interferes with the reception of the sensing signal and affects the implementation of the touch function.
Disclosure of Invention
The present invention provides a touch display device, which can eliminate the abnormal ripples of the sensing signal on the sensing electrode layer and reliably realize the touch function.
Another objective of the present invention is to provide a driving method of a touch display device, which can eliminate abnormal ripples of a sensing signal on an induction electrode layer, so that the touch display device can reliably implement a touch function.
In order to achieve the above object, the present invention first provides a touch display device, which includes a display panel, a touch layer disposed on the display panel, and a control module electrically connected to both the touch layer and the display panel;
the display panel comprises a plurality of data lines arranged at intervals; the touch layer comprises an induction electrode layer; the control module is electrically connected with the induction electrode layer through a detection signal wire;
a plurality of data lines of the display panel input data voltages; the control module detects the voltage on the induction electrode layer through the detection signal line, and when the control module detects that the waveform of the voltage on the induction electrode layer is corrugated, the control module reverses the polarity of data voltage input by a plurality of data lines of the display panel.
When the control module detects that the voltage on the induction electrode layer meets one of the conditions that the voltage is greater than a preset maximum threshold value and less than a preset minimum threshold value, the control module judges that the waveform of the voltage on the induction electrode layer has ripples.
The display panel is a liquid crystal display panel or an OLED display panel.
The touch display device also comprises a source driver electrically connected with the control module and the display panel; the control module is electrically connected with the display panel through the source driver; the source electrode driver is connected with the data lines; the source driver inputs data voltages to a plurality of data lines; when the control module detects that the waveform of the voltage on the induction electrode layer has ripples, the control module controls the source driver to invert the polarity of the data voltage input by a plurality of data lines of the display panel.
The touch control layer also comprises a touch control electrode layer arranged opposite to the induction electrode layer.
The invention also provides a driving method of the touch display device, which comprises the following steps:
step S1, providing a touch display device;
the touch display device comprises a display panel, a touch layer arranged on the display panel and a control module electrically connected with the touch layer and the display panel;
the display panel comprises a plurality of data lines arranged at intervals; the touch layer comprises an induction electrode layer; the control module is electrically connected with the induction electrode layer through a detection signal wire;
step S2, inputting data voltages to a plurality of data lines of the display panel;
step S3, the control module detects the voltage on the sensing electrode layer through the detection signal line, and when the control module detects that the waveform of the voltage on the sensing electrode layer has ripples, the control module reverses the polarity of the data voltage input by the data lines of the display panel.
In step S3, when the control module detects that the voltage on the sensing electrode layer satisfies one of a maximum threshold value and a minimum threshold value, it determines that the waveform of the voltage on the sensing electrode layer has ripples.
The display panel is a liquid crystal display panel or an OLED display panel.
The driving method of the touch display device further comprises a source driver electrically connected with the control module and the display panel; the control module is electrically connected with the display panel through the source driver; the source electrode driver is connected with the data lines;
in step S2, the source driver inputs data voltages to the plurality of data lines;
in step S3, when the control module detects that the waveform of the voltage on the sensing electrode layer has ripples, the control module controls the source driver to invert the polarity of the data voltage inputted by the plurality of data lines of the display panel.
The touch control layer also comprises a touch control electrode layer arranged opposite to the induction electrode layer.
The invention has the beneficial effects that: the touch display device comprises a display panel, a touch layer and a control module, wherein the display panel comprises a plurality of data lines arranged at intervals, the touch layer comprises an induction electrode layer, the control module is electrically connected with the induction electrode layer through a detection signal line, when the touch display device is driven, the control module is used for detecting the voltage on the induction electrode layer through the detection signal line, and when the control module detects that the waveform of the voltage on the induction electrode layer has ripples, the control module overturns the polarity of the data voltage input by the plurality of data lines of the display panel, so that the abnormal ripples of the sensing signal on the induction electrode layer can be effectively eliminated, and the touch function is reliably realized. The driving method of the touch display device can eliminate the abnormal ripples of the sensing signals on the sensing electrode layer, so that the touch display device can reliably realize the touch function.
Drawings
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
fig. 1 is a schematic structural diagram of a conventional touch display device;
FIG. 2 is a waveform diagram of voltages on the touch electrode layer and the sensing electrode layer in an ideal state of the conventional touch display device;
fig. 3 is a waveform diagram of voltages on the touch electrode layer and the sensing electrode layer when the Dot V Srtip screen is displayed by the conventional touch display device;
FIG. 4 is a schematic structural diagram of a touch display device according to the present invention;
FIG. 5 is a schematic diagram illustrating a connection between a display panel and a source driver of the touch display device according to the present invention;
FIG. 6 is a waveform diagram of voltages on the touch electrode layer and the sensing electrode layer when the Dot V Srtip screen is displayed by the touch display device of the present invention;
fig. 7 is a flowchart of a driving method of a touch display device according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 4, the present invention provides a touch display device, which includes a display panel 10, a touch layer 20 disposed on the display panel 10, and a control module 30 electrically connected to both the touch layer 20 and the display panel 10.
Referring to fig. 5, the display panel 10 includes a plurality of data lines 11 disposed at intervals. The touch layer 20 includes a sensing electrode layer 21. The control module 30 is electrically connected to the sensing electrode layer 21 through a detection signal line 40.
When the touch display device works, the data lines 11 of the display panel 10 input data voltages. The control module 30 detects the voltage on the sensing electrode layer 21 through the detection signal line 40, and when the control module 30 detects that the waveform of the voltage on the sensing electrode layer 21 has ripples, the control module 30 inverts the polarity of the data voltage input by the data lines 11 of the display panel 10.
Specifically, when the control module 30 detects that the voltage on the sensing electrode layer 21 satisfies one of a maximum threshold value and a minimum threshold value, it determines that the waveform of the voltage on the sensing electrode layer 21 has ripples.
Specifically, the display panel 10 is a liquid crystal display panel or an OLED display panel.
Specifically, referring to fig. 4 and 5, the touch display device further includes a source driver 50 electrically connected to the control module 30 and the display panel 10. The control module 30 is electrically connected to the display panel 10 through the source driver 50. The source driver 50 is connected to each of the plurality of data lines 11. The source driver 50 inputs a data voltage to the plurality of data lines 11. When the control module 30 detects that the waveform of the voltage on the sensing electrode layer 21 has ripples, the control module 30 controls the source driver 50 to invert the polarity of the data voltage inputted to the data lines 11 of the display panel 10.
Specifically, the touch layer 20 further includes a touch electrode layer 22 disposed opposite to the sensing electrode layer 21.
It should be noted that, when the touch display device of the present invention works, the control module 30 is utilized to detect the voltage on the sensing electrode layer 21 through the detection line 40, so as to monitor the waveform state of the voltage on the sensing electrode layer 21, and when it is detected that the waveform of the voltage on the sensing electrode layer 21 has ripples, the control module 30 directly reverses the polarity of the data voltage input by the data lines 11 of the display panel 10, by this way, the ripples of the waveform of the voltage on the sensing electrode layer 21 can disappear immediately, taking the Dot V Strip picture as an example, please refer to fig. 6, the ripples of the waveform of the voltage on the sensing electrode layer 21 in the present invention are effectively removed compared with the voltage waveform on the sensing electrode layer in the prior art in fig. 3, so compared with the prior art, the touch display device of the present invention can effectively remove the abnormal ripples of the voltage waveform of the voltage on the sensing electrode layer 21, the influence of abnormal ripples on the receiving of the sensing electrode layer 21 on the sensing signal is avoided, the normal realization of the touch function is ensured, the quality of a product is improved, and the problem of signal interference in the touch display device is solved.
Referring to fig. 7, based on the same inventive concept, the present invention further provides a driving method of a touch display device, including the following steps:
in step S1, please refer to fig. 4 and 5, a touch display device is provided.
The touch display device includes a display panel 10, a touch layer 20 disposed on the display panel 10, and a control module 30 electrically connected to both the touch layer 20 and the display panel 10.
The display panel 10 includes a plurality of data lines 11 disposed at intervals. The touch layer 20 includes a sensing electrode layer 21. The control module 30 is electrically connected to the sensing electrode layer 21 through a detection signal line 40.
Specifically, the display panel 10 is a liquid crystal display panel or an OLED display panel.
Specifically, the driving method of the touch display device further includes a source driver 50 electrically connected to the control module 30 and the display panel 10, wherein the control module 30 is electrically connected to the display panel 10 through the source driver 50, and the source driver 50 is connected to the plurality of data lines 11.
Specifically, the touch layer 20 further includes a touch electrode layer 22 disposed opposite to the sensing electrode layer 21.
In step S2, the data lines 11 of the display panel 10 input data voltages.
Specifically, in step S2, the source driver 50 inputs data voltages to the data lines 11.
In step S3, the control module 30 detects the voltage on the sensing electrode layer 21 through the detection signal line 40, and when the control module 30 detects that the waveform of the voltage on the sensing electrode layer 21 has ripples, the control module 30 inverts the polarity of the data voltage input by the data lines 11 of the display panel 10.
Specifically, in the step S3, when the control module 30 detects that the voltage on the sensing electrode layer 21 satisfies one of a maximum threshold value and a minimum threshold value, it determines that the waveform of the voltage on the sensing electrode layer 21 has ripples.
Specifically, in the step S3, when the control module 30 detects that the waveform of the voltage on the sensing electrode layer 21 has ripples, the control module 30 controls the source driver 50 to invert the polarity of the data voltage inputted by the data lines 11 of the display panel 10.
It should be noted that, in the driving method of the touch display device of the present invention, the control module 30 is utilized to detect the voltage on the sensing electrode layer 21 through the detection line 40, so as to monitor the waveform state of the voltage on the sensing electrode layer 21, when it is detected that the waveform of the voltage on the sensing electrode layer 21 has ripples, the control module 30 directly inverts the polarity of the data voltage input by the data lines 11 of the display panel 10, by this way, the ripples of the waveform of the voltage on the sensing electrode layer 21 can disappear immediately, taking the Dot V Strip picture as an example, please refer to fig. 6, the ripples of the waveform of the voltage on the sensing electrode layer 21 in the present invention are effectively removed compared with the voltage waveform on the sensing electrode layer in the prior art in fig. 3, so compared with the prior art, the touch display device of the present invention can effectively remove the abnormal ripples of the voltage waveform of the sensing electrode layer 21, the influence of abnormal ripples on the receiving of the sensing electrode layer 21 on the sensing signal is avoided, the normal realization of the touch function is ensured, the quality of a product is improved, and the problem of signal interference in the touch display device is solved.
In summary, the touch display device of the present invention includes a display panel, a touch layer and a control module, wherein the display panel includes a plurality of data lines arranged at intervals, the touch layer includes an inductive electrode layer, the control module is electrically connected to the inductive electrode layer through a detection signal line, when the control module is driven, the control module is used to detect a voltage on the inductive electrode layer through the detection signal line, and when the control module detects that a waveform of the voltage on the inductive electrode layer has ripples, the control module reverses polarities of data voltages input by the plurality of data lines of the display panel, so as to effectively eliminate abnormal ripples of the sensing signal on the inductive electrode layer, and reliably implement a touch function. The driving method of the touch display device can eliminate the abnormal ripples of the sensing signals on the sensing electrode layer, so that the touch display device can reliably realize the touch function.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (8)
1. A touch display device is characterized by comprising a display panel (10), a touch layer (20) arranged on the display panel (10) and a control module (30) electrically connected with the touch layer (20) and the display panel (10);
the display panel (10) comprises a plurality of data lines (11) arranged at intervals; the touch layer (20) comprises a sensing electrode layer (21); the control module (30) is electrically connected with the induction electrode layer (21) through a detection signal wire (40);
a plurality of data lines (11) of the display panel (10) input data voltages; the control module (30) detects the voltage on the induction electrode layer (21) through the detection signal line (40), and when the control module (30) detects that the waveform of the voltage on the induction electrode layer (21) has ripples, the control module (30) reverses the polarity of data voltage input by a plurality of data lines (11) of the display panel (10);
when the control module (30) detects that the voltage on the induction electrode layer (21) meets one of the conditions that the voltage is greater than a preset maximum threshold value and is less than a preset minimum threshold value, the waveform of the voltage on the induction electrode layer (21) is judged to have ripples.
2. Touch display device according to claim 1, wherein the display panel (10) is a liquid crystal display panel or an OLED display panel.
3. The touch display device according to claim 1, further comprising a source driver (50) electrically connected to the control module (30) and the display panel (10); the control module (30) is electrically connected with the display panel (10) through the source driver (50); the source electrode driver (50) is connected with a plurality of data lines (11); the source driver (50) inputs data voltages to a plurality of data lines (11); when the control module (30) detects that the waveform of the voltage on the sensing electrode layer (21) is rippled, the control module (30) controls the source driver (50) to invert the polarity of the data voltage input by the data lines (11) of the display panel (10).
4. Touch display device according to claim 1, wherein the touch layer (20) further comprises a touch electrode layer (22) arranged opposite the sensing electrode layer (21).
5. A driving method of a touch display device is characterized by comprising the following steps:
step S1, providing a touch display device;
the touch display device comprises a display panel (10), a touch layer (20) arranged on the display panel (10) and a control module (30) electrically connected with the touch layer (20) and the display panel (10);
the display panel (10) comprises a plurality of data lines (11) arranged at intervals; the touch layer (20) comprises a sensing electrode layer (21); the control module (30) is electrically connected with the induction electrode layer (21) through a detection signal wire (40);
step S2, inputting data voltages to a plurality of data lines (11) of the display panel (10);
step S3, the control module (30) detects the voltage on the sensing electrode layer (21) through the detection signal line (40), and when the control module (30) detects that the waveform of the voltage on the sensing electrode layer (21) has ripples, the control module (30) reverses the polarity of the data voltage input by the data lines (11) of the display panel (10);
in step S3, when the control module (30) detects that the voltage on the sensing electrode layer (21) satisfies one of a maximum threshold value and a minimum threshold value, it determines that the waveform of the voltage on the sensing electrode layer (21) has ripples.
6. The driving method of the touch display device according to claim 5, wherein the display panel (10) is a liquid crystal display panel or an OLED display panel.
7. The driving method of the touch display device according to claim 5, further comprising a source driver (50) electrically connected to the control module (30) and the display panel (10); the control module (30) is electrically connected with the display panel (10) through the source driver (50); the source electrode driver (50) is connected with a plurality of data lines (11);
in step S2, the source driver (50) inputs data voltages to a plurality of data lines (11);
in the step S3, when the control module (30) detects that the waveform of the voltage on the sensing electrode layer (21) has ripples, the control module (30) controls the source driver (50) to invert the polarity of the data voltage inputted by the data lines (11) of the display panel (10).
8. The driving method of the touch display device according to claim 5, wherein the touch layer (20) further comprises a touch electrode layer (22) disposed opposite to the sensing electrode layer (21).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483195.4A CN109375819B (en) | 2018-12-05 | 2018-12-05 | Touch display device and driving method thereof |
| PCT/CN2018/121850 WO2020113675A1 (en) | 2018-12-05 | 2018-12-18 | Touch display device and driving method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483195.4A CN109375819B (en) | 2018-12-05 | 2018-12-05 | Touch display device and driving method thereof |
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| Publication Number | Publication Date |
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| CN109375819A CN109375819A (en) | 2019-02-22 |
| CN109375819B true CN109375819B (en) | 2020-09-01 |
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| CN201811483195.4A Active CN109375819B (en) | 2018-12-05 | 2018-12-05 | Touch display device and driving method thereof |
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| CN (1) | CN109375819B (en) |
| WO (1) | WO2020113675A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006079405A (en) * | 2004-09-10 | 2006-03-23 | Oki Electric Ind Co Ltd | Information processor and controlling method thereof |
| KR101356968B1 (en) * | 2012-06-14 | 2014-02-03 | 엘지디스플레이 주식회사 | Display device with integrated touch screen |
| TWI482065B (en) * | 2012-10-16 | 2015-04-21 | Au Optronics Corp | Touch sensing display panel and driving method thereof |
| US9197167B2 (en) * | 2014-01-27 | 2015-11-24 | Pixart Imaging Inc. | Amplifying circuit and touch control sensing system |
| KR102215876B1 (en) * | 2014-02-03 | 2021-02-17 | 삼성디스플레이 주식회사 | Display apparatus and method for driving the same |
| CN108630159B (en) * | 2018-05-02 | 2020-06-16 | 深圳市华星光电技术有限公司 | Method and device for adjusting interference in liquid crystal touch screen and display device |
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- 2018-12-05 CN CN201811483195.4A patent/CN109375819B/en active Active
- 2018-12-18 WO PCT/CN2018/121850 patent/WO2020113675A1/en active Application Filing
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| Publication number | Publication date |
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| WO2020113675A1 (en) | 2020-06-11 |
| CN109375819A (en) | 2019-02-22 |
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