CN107272965B - Control method and control device of touch display panel and touch display device - Google Patents
Control method and control device of touch display panel and touch display device Download PDFInfo
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- CN107272965B CN107272965B CN201710562451.8A CN201710562451A CN107272965B CN 107272965 B CN107272965 B CN 107272965B CN 201710562451 A CN201710562451 A CN 201710562451A CN 107272965 B CN107272965 B CN 107272965B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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Abstract
本发明提供了一种触控显示面板的控制方法及控制装置、触控显示装置，涉及显示技术领域，可在一帧画面的显示周期内插入多次触控时段，提高触控精度。其中，触控显示面板的控制方法包括：一帧画面的显示周期包括多个显示时段和多个触控时段，其中，显示时段和触控时段相互交替；在各显示时段，向发光元件提供第一控制信号，使发光元件发光；在各触控时段，向发光元件提供第二控制信号，使发光元件停止发光，向触控单元提供触控驱动信号，进行触控识别。上述触控显示面板的控制方法用于控制触控显示面板实现显示和触控。
The present invention provides a control method and a control device of a touch display panel, and a touch display device, which relate to the field of display technology, and can insert multiple touch periods in the display period of one frame to improve the touch precision. The control method for a touch display panel includes: a display period of a frame of images includes multiple display periods and multiple touch periods, wherein the display periods and the touch periods alternate with each other; A control signal causes the light emitting element to emit light; in each touch period, a second control signal is provided to the light emitting element to stop the light emitting element from emitting light, and a touch driving signal is provided to the touch unit for touch recognition. The above-mentioned control method of a touch display panel is used to control the touch display panel to realize display and touch.
Description
Technical Field
The invention relates to the technical field of display, in particular to a control method and a control device of a touch display panel and a touch display device.
Background
Compared with other touch control modes such as resistance type touch control, wave type touch control and the like, the capacitance type touch control has the advantages of high touch control precision, high reaction speed and capability of realizing multi-point type touch control. In addition, the capacitive touch control mode is adopted, mechanical displacement of a touched entity is not generated, and abrasion of a contact point does not exist, so that the service life of the capacitive sensor is permanent in theory, and the maintenance cost is reduced to a certain extent.
Capacitive touch generally includes two modes, namely, on-cell capacitive touch and in-cell capacitive touch, where the off-cell capacitive touch is to embed a touch screen between a color filter and a polarizer of a display screen, and the off-cell capacitive touch is to embed a touch panel in a liquid crystal pixel. The embedded capacitive touch has the advantages of better touch signal quantity and reduction of the weight and thickness of the liquid crystal display, so that the embedded capacitive touch is more widely applied compared with the external capacitive touch.
In the conventional embedded capacitive touch technology, to implement the display and touch functions of the touch display panel, a display cycle of each frame of image is usually divided into a display time interval and a touch time interval in advance, the display function of the touch display panel is implemented in the display time interval, and the touch function of the touch display panel is implemented in the touch time interval. However, in the conventional touch display panel, only one touch time interval can be inserted after one complete display time interval in the display period of one frame of picture, which may cause a certain limitation to the touch precision.
Disclosure of Invention
The invention provides a control method and a control device of a touch display panel and a touch display device, which can insert multiple touch time intervals in a display period of a frame of picture and improve touch precision.
In order to achieve the purpose, the invention adopts the following technical scheme:
a first aspect of the present invention provides a method for controlling a touch display panel, including:
the display cycle of one frame of picture comprises a plurality of display time intervals and a plurality of touch time intervals, wherein the display time intervals and the touch time intervals are mutually alternated;
providing a first control signal to a light emitting element to make the light emitting element emit light in each display period;
and in each touch time interval, providing a second control signal to the light-emitting element to stop the light-emitting element from emitting light, and providing a touch driving signal to the touch unit to perform touch identification.
In the control method of the touch display panel provided by the invention, the display period of one frame of picture is divided into a plurality of display time intervals and a plurality of touch time intervals. The light-emitting element stops emitting light under the action of the second control signal every time the second control signal is provided, and provides a primary touch driving signal to the touch unit while providing the second control signal, and at the moment, the touch unit performs primary touch identification under the control of the touch driving signal. That is, each time the second control signal and the touch driving signal are provided, a touch period is inserted into a display period of one frame of the image. Compared with the prior art, the control method of the touch display panel provided by the invention can simultaneously provide the second control signal and the touch driving signal for a plurality of times in the display period of one frame of picture, so that a plurality of touch time intervals can be inserted in the display period of one frame of picture, and the touch unit can make a plurality of responses to touch actions generated on the surface of the touch display panel, thereby improving the touch precision.
The second aspect of the present invention provides a control device for a touch display panel, including a signal modulation unit and a signal output unit;
the signal modulation unit is used for modulating the signal sent by the signal output unit, so that the signal sent by the signal output unit corresponds to a plurality of display time intervals and a plurality of touch time intervals in a display period of one frame of picture respectively, wherein the display time intervals and the touch time intervals are mutually alternated;
the signal output unit is respectively connected with the touch control driving unit and the negative electrode of the light-emitting element;
the signal output unit is used for: providing a first control signal in each display period to make the light-emitting element emit light; and providing a second control signal in each touch time interval to stop the light-emitting element from emitting light, and providing a touch driving signal to the touch unit by the touch driving unit under the trigger of the second control signal to perform touch identification.
The beneficial effects of the control device of the touch display panel provided by the invention are the same as the beneficial effects of the control method of the touch display panel provided by the first aspect of the invention, and the details are not repeated here.
A third aspect of the invention provides a touch display device comprising a touch display panel and a control device of the touch display panel according to the second aspect of the invention.
The beneficial effects of the touch display device provided by the present invention are the same as the beneficial effects of the control method of the touch display panel provided by the first aspect of the present invention, and are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a control method of a touch display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control device of a touch display panel according to a second embodiment of the present invention;
fig. 3 is a signal timing diagram corresponding to the control device of the touch display panel according to the second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a touch display panel in a touch display device according to a third embodiment of the present invention.
Description of reference numerals:
1-a signal modulation unit; 2-a signal output unit;
3-a touch driving unit; 4-a light emitting element;
5-a touch unit; 6-a light emission driving unit;
7-touch sensing electrodes; 8-a first substrate base plate;
9-a second substrate base plate; 10-touch drive electrodes.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
Example one
As shown in fig. 1, the method for controlling a touch display panel includes:
step S1: the display cycle of one frame of picture comprises a plurality of display time intervals and a plurality of touch time intervals, wherein the display time intervals and the touch time intervals are mutually alternated.
Step S2: in each display period, a first control signal is supplied to the light emitting element to cause the light emitting element to emit light.
Step S3: and in each touch time interval, providing a second control signal to the light-emitting element to stop the light-emitting element from emitting light, and providing a touch driving signal to the touch unit to perform touch identification.
In the control method of the touch display panel provided in this embodiment, a display cycle of one frame of picture is divided into a plurality of display periods and a plurality of touch periods. The light-emitting element stops emitting light under the action of the second control signal every time the second control signal is provided, and provides a primary touch driving signal to the touch unit while providing the second control signal, and at the moment, the touch unit performs primary touch identification under the control of the touch driving signal. That is, each time the second control signal and the touch driving signal are provided, a touch period is inserted into a display period of one frame of the image. Compared with the prior art, the control method of the touch display panel provided by the embodiment can simultaneously provide the second control signal and the touch driving signal for multiple times in the display period of one frame of picture, so that multiple touch time intervals can be inserted in the display period of one frame of picture, and the touch unit can make multiple responses to touch actions on the surface of the touch display panel, thereby improving the touch precision.
It should be noted that, in this embodiment, when the display period of one frame of the image starts, the touch time period may be inserted first, or the touch time period may be inserted after one display time period ends. In addition, it can be understood that, in each touch time interval, the touch driving signals provided to the touch unit are all pulse signals.
Wherein, step S2 specifically includes: supplying a first control signal to a cathode of the light emitting element at each display period; and under the triggering of the first control signal, providing a light-emitting driving signal to the anode of the light-emitting element, wherein the light-emitting element emits light under the action of the light-emitting driving signal and the first control signal.
Step S3 specifically includes: providing a second control signal to the cathode of the light-emitting element in each touch time interval, and enabling the light-emitting element to stop emitting light under the action of the second control signal; and providing a second control signal to the touch sensing electrode, providing a touch driving signal to the touch driving electrode under the triggering of the second control signal, and performing touch identification by detecting the change of the second control signal on the touch sensing electrode.
When the light emitting element is required to emit light normally in the display period, the light emitting driving signal may be provided to the positive electrode of the light emitting element, and the first control signal may be provided to the negative electrode of the light emitting element, so that a potential difference is formed between the positive electrode and the negative electrode of the light emitting element, and the light emitting element is driven to emit light normally. When the light-emitting element is required to stop emitting light in the touch control period, the second control signal can be provided to the negative electrode of the light-emitting element, and the provided second control signal can enable the potential difference between the positive electrode and the negative electrode of the light-emitting element to be offset, so that the light-emitting element stops emitting light. It is understood that the light emission driving signal, the first control signal, and the second control signal may be voltage signals, and the voltage value of the first control signal is less than the voltage value of the light emission driving signal, and the voltage value of the second control signal is greater than or equal to the voltage value of the light emission driving signal.
The first control signal and the second control signal may be used not only as signals to be supplied to the negative electrodes of the light-emitting elements but also as trigger signals. Taking the light-emitting driving signal provided by the light-emitting driving unit and the touch driving signal provided by the touch driving unit as examples, the first control signal is provided at each display time interval, on one hand, the first control signal is transmitted to the cathode of the light-emitting element as a signal of the cathode of the light-emitting element, on the other hand, the first control signal is also transmitted to the light-emitting driving unit as a trigger signal of the light-emitting driving unit, and the light-emitting driving unit provides the light-emitting driving signal to the anode of the light-emitting element under the trigger of the first control signal.
Similarly, a second control signal is provided at each touch time interval, on one hand, the second control signal is transmitted to the cathode of the light emitting element to serve as a signal of the cathode of the light emitting element, on the other hand, the second control signal is also transmitted to the touch driving unit to serve as a trigger signal of the touch driving unit, and the touch driving unit provides a touch driving signal to the touch driving electrode in the touch driving unit under the trigger of the second control signal, so as to realize touch recognition.
In addition, in the prior art, after entering a touch period, a stable and continuous signal needs to be provided for the touch sensing electrode, and when the touch sensing electrode senses a touch action, the signal loaded on the touch sensing electrode emits light and changes, so as to perform touch identification according to the change condition of the signal. In the control method of the touch display panel provided in this embodiment, since a stable and continuous second control signal is provided in the touch time period, the provided second control signal can be simultaneously used as a signal loaded on the touch sensing electrode, and the touch recognition can be performed by detecting the change of the second control signal on the touch sensing electrode. By adopting the signal multiplexing mode, a signal wire for providing signals for the touch sensing electrode is not required to be independently arranged, so that the complexity of the arrangement of the signal wire can be reduced, and the manufacturing cost of the touch display device can be reduced.
In order to make the process of inserting the touch time intervals more regular and convenient to control, it is preferable that the time lengths of the display time intervals in the display period of one frame of the picture are equal, and the time lengths of the touch time intervals are equal.
It can be understood that the number of times of inserting the touch period within the display period of one frame of the image can be determined by the requirement of the user on the touch precision. When the user has a high requirement on the touch accuracy of the touch display panel, a large number of touch time intervals may be inserted into the display period of one frame of image, and when the user has a low requirement on the touch accuracy of the touch display panel, a small number of touch time intervals may be inserted into the display period of one frame of image.
Example two
As shown in fig. 2, the present embodiment provides a control device of a touch display panel, which includes a signal modulation unit 1 and a signal output unit 2.
The signal modulation unit 1 is configured to modulate the signal sent by the signal output unit 2, so that the signal sent by the signal output unit 2 corresponds to a plurality of display periods and a plurality of touch periods in a display period of a frame of picture, respectively, where the display periods and the touch periods alternate with each other.
The signal output unit 2 is connected to the touch driving unit 3 and the cathode of the light emitting element 4, respectively. The signal output unit 2 is configured to: supplying a first control signal to cause the light emitting element 4 to emit light in each display period; and providing a second control signal in each touch time interval to stop the light-emitting element 4 from emitting light, and providing a touch driving signal to the touch unit 5 by the touch driving unit 3 under the trigger of the second control signal to perform touch identification.
With the control device of the touch display panel provided in this embodiment, under the modulation of the signal modulation unit 1, the signal output unit 2 can respectively correspond to a plurality of display periods and a plurality of touch periods in the display period of one frame of picture. In the touch time period, the signal output unit 2 sends out a second control signal, on one hand, the second control signal is transmitted to the light emitting element 4 to stop the light emitting element 4 from emitting light, and on the other hand, the second control signal is transmitted to the touch driving unit 3 as a trigger signal of the touch driving unit 3 to enable the touch driving unit 3 to provide a touch driving signal to the touch unit 5 for touch recognition. Since the signal output unit 2 can provide the second control signal for multiple times in the display period of one frame of picture, multiple touch periods can be inserted in the display period of one frame of picture, so that the touch unit 5 can respond to the touch action on the surface of the touch display panel for multiple times, thereby improving the touch precision.
Further, the signal output unit 2 may be connected to a light emission driving unit 6, and the light emission driving unit 6 is connected to the anode of the light emitting element 4. The light emission driving unit 6 is configured to supply a light emission driving signal to the anode of the light emitting element 4 under the trigger of the first control signal when the signal output unit 2 supplies the first control signal in each display period. That is, in each display period, the signal output unit 2 provides the first control signal, on one hand, the first control signal is transmitted to the cathode of the light emitting element 4 as the signal of the cathode of the light emitting element 4, on the other hand, the first control signal is also transmitted to the light emitting driving unit 6 as the trigger signal of the light emitting driving unit 6, and the light emitting driving unit 6 provides the light emitting driving signal to the anode of the light emitting element 4 under the trigger of the first control signal, and at this time, a potential difference is formed between the anode and the cathode of the light emitting element 4, so as to drive the light emitting element 4 to normally emit light.
The following clearly and specifically describes, with reference to fig. 2 and fig. 3, a control method of the touch display panel provided in the first embodiment and a control device of the touch display panel provided in the second embodiment by using specific implementation manners:
for convenience of understanding, the display cycle of one frame of image includes three touch periods, and it is understood that the display cycle of one frame of image may include k touch periods, where k is an integer greater than or equal to 1. As shown in fig. 3, when the light emitting element is an organic light emitting diode, it is assumed that three display periods T are included in the display period of one frame of picture1d～T3dAnd three touch time periods T1t～T3tWherein the display period and T1d～T3dAnd touch time period T1t～T3tAlternate with each other. When the frame trigger signal STV is triggered at a low level, a display period of one frame starts.
In the display period T1dThe signal VSS provided by the signal output unit 2 is a low-level first control signal, and the gate line G is triggered by the low-level first control signal1-grid line GmSequentially supplying low-level conduction signals, the light-emitting drive signal supplied by the light-emitting drive unit 6 can be transmitted to the gate line G1-grid line GmThe corresponding organic light emitting diode anode due to the grid line G1-grid line GmThe signals received by the cathodes of the corresponding organic light emitting diodes are all the first control signals with low level, so that the signals are displayed in the display period T1dGrid line G1-grid line GmThe corresponding organic light emitting diodes can emit light normally line by line.
At the touch time interval T1tThe signal VSS provided by the signal output unit 2 is a high level second control signal, and at this time, the gate line G is connected to a gate line1-grid line GmThe potential of the cathode of the corresponding organic light emitting diode is pulled high, so that the gate line G1-grid line GmThe corresponding organic light emitting diode stops emitting light. Meanwhile, the touch driving unit 3 sequentially supplies the touch driving signal TX of high level to the touch unit 5 under the trigger of the second control signal of high level1～TXnAnd performing touch identification.
In the display period T2dThe signal VSS provided by the signal output unit 2 is a low-level first control signal, and the gate line G is triggered by the low-level first control signalm+1-grid line G2mSequentially supplying low-level conduction signals, the light-emitting drive signal supplied by the light-emitting drive unit 6 can be transmitted to the gate line Gm+1-grid line G2mThe corresponding organic light emitting diode anode due to the grid line Gm+1-grid line G2mThe signals received by the cathodes of the corresponding organic light emitting diodes are all the first control signals with low level, so that the signals are displayed in the display period T2dGrid line Gm+1-grid line G2mThe corresponding organic light emitting diodes can emit light normally line by line.
At the touch time interval T2tInput of signalsThe signal VSS provided by the output unit 2 is a high level second control signal, and at this time, the gate line G is connected to a gate linem+1-grid line G2mThe potential of the cathode of the corresponding organic light emitting diode is pulled high, so that the gate line Gm+1-grid line G2mThe corresponding organic light emitting diode stops emitting light. Meanwhile, the touch driving unit 3 sequentially supplies the touch driving signal TX of high level to the touch unit 5 under the trigger of the second control signal of high level1～TXnAnd performing touch identification.
In the display period T3dThe signal VSS provided by the signal output unit 2 is a low-level first control signal, and is triggered by the low-level first control signal through the gate line G2m+1-grid line GnSequentially supplying low-level conduction signals, the light-emitting drive signal supplied by the light-emitting drive unit 6 can be transmitted to the gate line G2m+1-grid line GnThe corresponding organic light emitting diode anode because the grid line G is arranged at the moment2m+1-grid line GnThe signals received by the cathodes of the corresponding organic light emitting diodes are all the first control signals with low level, so that the signals are displayed in the display period T2dGrid line G2m+1-grid line GnThe corresponding organic light emitting diodes can emit light normally line by line. At this time, the gate line G1-grid line GnAll the corresponding organic light emitting diodes emit light, and a complete light emitting process is realized.
At the touch time interval T3tThe signal VSS provided by the signal output unit 2 is a high level second control signal, and at this time, the gate line G is connected to a gate line2m+1-grid line GnThe potential of the cathode of the corresponding organic light emitting diode is pulled high, so that the gate line G2m+1-grid line GnThe corresponding organic light emitting diode stops emitting light. Meanwhile, the touch driving unit 3 sequentially supplies the touch driving signal TX of high level to the touch unit 5 under the trigger of the second control signal of high level1～TXnAnd performing touch identification.
EXAMPLE III
The embodiment provides a touch display device, which comprises a touch display panel and a control device of the touch display panel as described in the second embodiment.
Compared with the conventional touch display device, because the touch display device provided by the embodiment includes the control device of the touch display panel as described in the second embodiment, a plurality of touch time intervals can be inserted into a display cycle of a frame of a picture by using the touch display device provided by the embodiment, so that the touch display device has higher touch precision.
The touch display panel, such as a hybrid-in-cell (hybrid-in-cell) touch display panel, includes a first substrate and a second substrate disposed opposite to each other, and a touch unit and a light emitting element disposed between the first substrate and the second substrate. The touch control unit is connected with a touch control driving unit in a control device of the touch control display panel, the anode of the light-emitting element is connected with a light-emitting driving unit in the control device of the touch control display panel, and the cathode of the light-emitting element is connected with a signal output unit in the control device of the touch control display panel.
The touch unit may specifically include a touch driving electrode and a touch sensing electrode, both of which may be disposed on a side of the first substrate facing the second substrate, or both of which may be disposed on a side of the second substrate facing the second substrate, or as shown in fig. 4, the touch sensing electrode 7 is disposed on a side of the first substrate 8 facing the second substrate 9, and the touch driving electrode 10 is disposed on a portion of the second substrate 9 facing the first substrate 8, which corresponds to the display area.
When the touch unit comprises the touch driving electrode and the touch sensing electrode, the touch driving electrode is connected with the touch driving unit. Preferably, the touch sensing electrode may be connected to the signal output unit. In each touch time interval, the signal output unit provides a second control signal, the touch driving unit provides a touch driving signal to the touch driving electrode under the trigger of the second control signal, and the touch sensing electrode receives the second control signal provided by the signal output unit and performs touch identification by detecting the change of the second control signal on the touch sensing electrode.
In the touch control time period, the signal output unit can continuously provide a stable second control signal, so that the touch control sensing electrode is connected with the signal output unit, the second control signal provided by the signal output unit can be used as a signal loaded on the touch control sensing electrode, and a signal wire for providing the signal for the touch control sensing electrode is not required to be separately arranged in a signal multiplexing mode, so that the complexity of signal wire arrangement can be reduced, and the manufacturing cost of the touch control display device can be reduced.
Optionally, the light emitting element may be an organic light emitting diode, and when the light emitting element is an organic light emitting diode, the anode of the organic light emitting diode is connected to the light emitting driving unit, and the cathode of the organic light emitting diode is connected to the signal output unit.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
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| CN108664163A (en) * | 2018-04-26 | 2018-10-16 | 北京集创北方科技股份有限公司 | Control method and touch display system |
| CN108470543A (en) * | 2018-05-23 | 2018-08-31 | 武汉华星光电半导体显示技术有限公司 | A kind of pixel circuit and its driving method, display panel |
| CN111596780A (en) * | 2019-02-20 | 2020-08-28 | 富泰华工业（深圳）有限公司 | Touch display structure, intelligent device and driving method |
| CN110083268B (en) | 2019-04-25 | 2021-05-07 | 京东方科技集团股份有限公司 | Circuit control method and control device, display module and display device |
| CN112817486B (en) * | 2021-02-25 | 2023-12-01 | 奕力科技股份有限公司 | touch display device |
| CN114913799A (en) * | 2022-05-07 | 2022-08-16 | 深圳市爱协生科技有限公司 | Display control method, device and display device |
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| CN103207720B (en) * | 2013-03-29 | 2015-09-16 | 北京京东方光电科技有限公司 | A kind of control method of touch-control display panel and device and display device |
| CN103677412B (en) * | 2013-12-09 | 2016-08-31 | 合肥京东方光电科技有限公司 | A kind of In-cell touch panel and driving method thereof |
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| CN103150069A (en) * | 2013-03-01 | 2013-06-12 | 合肥京东方光电科技有限公司 | Capacitance type in cell touch panel and display device |
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| CN107272965A (en) | 2017-10-20 |
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