CN112650410B - Driving method of touch display panel and display device - Google Patents

Driving method of touch display panel and display device Download PDF

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Publication number
CN112650410B
CN112650410B CN202011531596.XA CN202011531596A CN112650410B CN 112650410 B CN112650410 B CN 112650410B CN 202011531596 A CN202011531596 A CN 202011531596A CN 112650410 B CN112650410 B CN 112650410B
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touch
display
area
sub
display panel
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CN112650410A (en
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索磊
林兆敏
唐铖
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • G06F1/3265—Power saving in display device
    • 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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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The embodiment of the application discloses a driving method of a touch display panel and display equipment, wherein the method comprises the following steps: acquiring a touch detection signal on the touch display panel; based on the touch detection signal, determining a touch area and touch signal intensity of each place in the touch area; and determining the display brightness of each display pixel of a target display area in the touch display panel based on the touch signal intensity of each place in the touch area, wherein the projection of the target display area on the plane of the touch display panel coincides with the projection of the touch area on the plane of the touch display panel. Therefore, a connection is established between the touch drive and the display drive of the touch display panel, the correlation among all the components in the touch display panel is improved, and in practical application, when the touch occurs on the surface of the touch display panel, the lower the display brightness of the display pixels corresponding to the touch area is, so that the power consumption of the touch display panel is reduced.

Description

Driving method of touch display panel and display device
Technical Field
The present application relates to the field of manufacturing technologies, and in particular, to a driving method of a touch display panel and a display device.
Background
With the continuous development of display technology, more and more display devices are widely applied to daily life and work of people, bring great convenience to daily life and work of people, and become an indispensable important tool for people at present.
At present, in practical application, most display devices integrate a touch control part, so that the display device has a touch control function on the basis of having a display function, and is suitable for the development of touch control technology. However, when the existing display device integrated with the touch control part works, the display part and the touch control part are two independent integers, so how to establish a connection between a display driver and a touch control driver in the display device with the touch control part, and the relevance among all the components in the display device is improved, and the display device becomes a research hot spot for a person skilled in the art.
Disclosure of Invention
In order to solve the above problems, an embodiment of the present application provides a driving method of a touch display panel, which can establish a connection between a display driver and a touch driver in a display device having a touch portion, and improve the correlation between components in the display device.
Specifically, an embodiment of the present application provides a method for driving a touch display panel, which is characterized by comprising:
acquiring a touch detection signal on the touch display panel;
based on the touch detection signal, determining a touch area and touch signal intensity of each place in the touch area;
And determining the display brightness of each display pixel of a target display area in the touch display panel based on the touch signal intensity of each place in the touch area, wherein the projection of the target display area on the plane of the touch display panel coincides with the projection of the touch area on the plane of the touch display panel.
In addition, the embodiment of the application also provides a display device, which comprises a touch display panel and a driving device, wherein the driving device is used for executing the following steps:
acquiring a touch detection signal on the touch display panel;
based on the touch detection signal, determining a touch area and touch signal intensity of each place in the touch area;
And determining the display brightness of each display pixel of a target display area in the touch display panel based on the touch signal intensity of each place in the touch area, wherein the projection of the target display area on the plane of the touch display panel coincides with the projection of the touch area on the plane of the touch display panel.
According to the driving method and the display device of the touch display panel, the touch area can be determined based on the touch detection signal, and the display brightness of the display area corresponding to the touch area can be adjusted, so that a connection is established between the touch drive and the display drive of the touch display panel, the correlation among all components in the touch display panel is improved, and in practical application, when the touch occurs on the surface of the touch display panel, the lower the display brightness of the display pixels corresponding to the touch area is, so that the power consumption of the touch display panel is reduced.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a driving method of a touch display panel according to an embodiment of the application;
fig. 2 is a schematic diagram of a touch area in a driving method of a touch display panel according to an embodiment of the application;
fig. 3 is an equivalent schematic diagram of a touch area in a driving method of a touch display panel according to an embodiment of the application;
Fig. 4 is a schematic diagram illustrating a touch detection signal representation value of a portion of the touch display panel when no touch is generated on the surface of the touch display panel in the driving method of the touch display panel according to an embodiment of the present application;
Fig. 5 is a representation value of touch detection signals at local positions of the touch display panel when the touch is generated on the surface of the touch display panel in the driving method of the touch display panel according to an embodiment of the present application;
fig. 6 is a schematic diagram of touch signal intensity at local locations of the touch display panel when a touch is generated on the surface of the touch display panel in the driving method of the touch display panel according to an embodiment of the present application;
fig. 7 is a schematic diagram of a ratio of touch signals at local locations of the touch display panel when a touch is generated on the surface of the touch display panel in the driving method of the touch display panel according to an embodiment of the present application;
fig. 8 is a schematic diagram of a ratio of touch signals corresponding to each display pixel in a local display area when a touch is generated on the surface of the touch display panel in the driving method of the touch display panel according to another embodiment of the application;
FIG. 9 is a schematic diagram of the ratio of the touch signals at the boundaries of the sub-regions shown in FIG. 8;
FIG. 10 is a schematic diagram of the touch signal ratio at the boundary of the two adjacent display sub-regions, taking the larger value of the touch signal ratio at the boundary of the two adjacent display sub-regions as the touch signal ratio at the boundary of the two adjacent display sub-regions when the touch signal ratios at the boundaries of the respective display sub-regions are different;
Fig. 11 is a schematic diagram of a ratio of touch signals corresponding to each display pixel in a local display area when a touch is generated on the surface of the touch display panel in the driving method of the touch display panel according to another embodiment of the present application;
FIG. 12 is a schematic diagram of a linear function;
FIG. 13 is a graph showing an exponential function;
Fig. 14 is a representation of feedback data (i.e., a touch detection signal) of a portion of a touch signal before a touch is not generated on a surface of the touch display panel in a driving method of a touch display panel according to still another embodiment of the present application;
fig. 15 is a display brightness representation value when a part of display pixels in the touch display panel display data source information display brightness before touch control occurs on the surface of the touch display panel in the driving method of the touch display panel according to still another embodiment of the present application;
Fig. 16 is a schematic diagram showing a representation of feedback data (i.e., a touch detection signal) of a portion of a touch signal when a touch is generated on a surface of a touch display panel in a driving method of the touch display panel according to another embodiment of the present application;
FIG. 17 is a schematic diagram showing display brightness characterization values of partial display pixels in the touch display panel after adjusting display brightness in an image data source corresponding to each display pixel in each display sub-area based on a touch signal ratio corresponding to each display pixel in each display sub-area according to a driving method of a touch display panel according to another embodiment of the present application;
Fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 19 is a schematic structural diagram of a display device according to another embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
As described in the background section, how to establish a connection between a display driver and a touch driver in a display device having a touch portion becomes a research focus of those skilled in the art when the display device having the touch portion is operated, in which the display portion and the touch portion are two independent units.
Specifically, the touch control part in the display device is composed of a touch control electrode and a touch control chip detection circuit, when in operation, the touch control chip detection circuit controls the touch control electrode and feeds back real-time touch control information to the host chip of the display device, the display part is composed of a display module and a display chip driving circuit, the display chip driving circuit controls and receives image information transmitted by the host chip and controls the display module to display, and the two parts work independently.
Moreover, when the touch control part and the display part in the display device are independently driven, the power consumption of the display device is the sum of the power consumption of the display part and the power consumption of the touch control part, and the power consumption is larger.
In view of the above, an embodiment of the present application provides a driving method of a touch display panel, as shown in fig. 1, the method includes:
S1: and acquiring a touch detection signal on the touch display panel.
In one embodiment of the present application, acquiring the touch detection signal on the touch display panel includes: the method comprises the steps of monitoring touch detection signals on the touch display panel in real time, so that the touch detection signals can be timely detected when touch occurs on the touch display panel; in another embodiment of the present application, acquiring the touch detection signal on the touch display panel includes: the touch detection signal on the touch display panel is obtained at a preset frequency, so that the power consumption of the touch display panel is reduced on the basis of timely detecting the touch detection signal.
S2: and determining a touch area and the touch signal intensity of each place in the touch area based on the touch detection signal.
Optionally, in an embodiment of the present application, determining the touch area and the touch signal intensity of each place in the touch area based on the touch detection signal includes: determining a touch area and the touch signal intensity of each place in the touch area based on the touch detection signal and a preset touch detection signal; the preset touch detection signal is a detection signal obtained when no touch is generated everywhere in the touch area.
It should be noted that, the principle of touch detection of the touch display panel is to implement touch detection based on capacitance change between touch electrodes in the touch display panel caused by a conductor close to the touch display panel, and in a specific application, when the touch display panel surface is touched, not only a capacitance signal of an area where the conductor is directly contacted with the touch display panel surface will change, but also a capacitance signal of a neighboring area centered on the area will change, so in an embodiment of the present application, as shown in fig. 2 and 3, the touch area includes a direct contact area a between the conductor and the touch display panel surface when the touch display panel surface is touched, and an area B with a certain distance between the conductor and the touch display panel surface, which is specific to the touch detection signal compared with a corresponding preset touch detection signal.
Specifically, based on the foregoing embodiment, in one embodiment of the present application, the touch area is an area where the touch detection signal changes compared with the corresponding preset touch detection signal, and in another embodiment of the present application, the touch area is an area where the difference between the touch detection signal and the corresponding preset touch detection signal is greater than a first preset value, and the specific value of the first preset value is not limited, specifically depending on the touch detection sensitivity of the touch display panel.
It should be noted that, in the touch area, when the distance between the conductor touching the surface of the touch display panel and the surface of the touch display panel is different, the corresponding intensities of the touch signals are also different.
Based on the above embodiments, in one embodiment of the present application, determining the touch area and the touch signal intensity of each place in the touch area based on the touch detection signal and a preset touch detection signal includes: and carrying out zeroing treatment on the touch detection signals of all the positions in the touch area based on the corresponding preset touch detection signals of all the positions in the touch area to obtain the touch signal intensity of all the positions in the touch area.
The process of obtaining the touch signal intensity of each location in the touch area in the embodiment of the present application is described below with reference to a specific embodiment.
For convenience of description, it is assumed that when no touch occurs on the surface of the touch display panel, the touch detection signals of each place in the touch display panel are the same, as shown in fig. 4, but in a specific practical application, when no touch occurs on the touch display panel, the touch detection signals of each place in the touch display panel may be the same, or may be different, or may be partially the same, or the application is not limited thereto, and is specific according to circumstances.
Specifically, in one embodiment of the present application, when no touch occurs on the surface of the touch display panel, the characterization value of the touch detection signal at each place in the touch display panel is 900, and the method continues as shown in fig. 4; when the touch control occurs on the surface of the touch control display panel, the touch control detection signals of all the positions in the touch control display panel are shown in fig. 5, and as can be seen from fig. 5, the touch control detection signals of partial regions of the touch control display panel are changed, the representation value of the touch control detection signals is reduced to 400, 500 or 600, and the region where the touch control detection signals are changed is the touch control region in the embodiment of the application; subtracting the representation value of the corresponding preset touch detection signal from the representation value of the touch detection signal at each place in the touch display panel, namely performing zeroing treatment on the touch detection signal at each place in the touch display panel to obtain the floating change value of the touch detection signal at each place in the touch area in the touch display panel, as shown in fig. 6, namely the touch signal intensity at each place in the touch area.
It should be noted that, in the embodiment of the present application, when the touch detection signals in the touch display panel are different, or partially the same, and partially different, the process of obtaining the touch signal intensity in the touch area is applicable as well, but in the data processing process of each step, the representation value of the preset touch detection signal corresponding to each touch detection signal is not fixed 900 any more, but the actual representation value of the corresponding preset touch detection signal.
S3: and determining the display brightness of each display pixel of a target display area in the touch display panel based on the touch signal intensity of each place in the touch area, wherein the projection of the target display area on the plane of the touch display panel coincides with the projection of the touch area on the plane of the touch display panel, namely the target display area is the area corresponding to the touch area in the display area of the touch display panel.
It should be noted that, the density of the display pixels in the touch display panel is large, the area of each display pixel is smaller, and the gap between the adjacent display pixels is smaller, so when the touch occurs on the surface of the touch display panel, the target display area corresponding to the touch area generally has a large number of display pixels.
Thus, in one embodiment of the present application, determining the display brightness of each display pixel of the target display area in the touch display panel based on the touch signal intensity everywhere in the touch area includes:
S31: and determining the touch signal ratio of each touch subarea in the touch area based on the touch signal intensity of each place in the touch area, wherein the touch signal ratio is the ratio of the touch signal intensity of each touch subarea to a touch detection signal when no touch signal occurs in the touch subarea. It should be noted that, in the embodiment of the present application, the intensities of the touch signals in the same touch sub-area are the same, and the intensities of the touch signals in different touch sub-areas are different, that is, in the embodiment of the present application, the area with the same intensity of the touch signal in the touch area is determined as one touch sub-area.
Taking the touch signal intensity shown in fig. 6 as an example, the ratio of the floating change value of the touch detection signal in each area of the touch display panel where the touch detection signal changes to the corresponding characterization value of the preset touch detection signal is calculated, so as to obtain the ratio of the touch signal in the touch area of the touch display panel, as shown in fig. 7.
S32: and determining the touch signal ratio corresponding to each display pixel in each display subarea based on the touch signal ratio of each touch subarea in the touch area and the number of display pixels included in each display subarea in the target display area, wherein the display subareas are in one-to-one correspondence with the touch subareas.
It should be noted that, in the embodiment of the present application, one display sub-area may include a plurality of display pixels, and in particular, in practical application, the area of one touch electrode in the touch display panel is generally N times that of the display pixels, so in the embodiment of the present application, one touch electrode corresponds to a plurality of display pixels. Specifically, in one embodiment of the present application, the touch display panel includes m×n touch sub-areas and x×y display pixels, and the number of display pixels included in each display sub-area isIf the touch display panel includes a 4×10 touch electrode matrix, the resolution of the display area corresponding to the touch electrode matrix is 1080×1920, that is, when the display pixel matrix of the display area corresponding to the touch electrode matrix is 1080×1920, the number of display pixels corresponding to the lower portion of one touch electrode is 270×192.
Therefore, in one embodiment of the present application, determining, based on the touch signal ratio of each touch sub-area in the touch area, the touch signal ratio corresponding to each display pixel in the display sub-area includes:
Based on the touch signal ratio of each touch sub-region in the touch region, determining the touch signal ratio corresponding to each display sub-region in the target display region, wherein the display sub-regions are in one-to-one correspondence with the touch sub-regions, that is, one display sub-region corresponds to one touch signal ratio, and different display sub-regions correspond to different touch signal ratios, as shown in fig. 8;
and determining the touch signal ratio corresponding to each display pixel in each display sub-area based on the touch signal ratio corresponding to each display sub-area and the number of display pixels included in each display sub-area.
It should be noted that, in the embodiment of the present application, each display sub-area includes a plurality of display pixels, and the number of display pixels included in different display sub-areas may be the same or different.
Specifically, based on the foregoing embodiments, in one embodiment of the present application, determining, based on the touch signal ratio corresponding to each display sub-area and the display number included in the display sub-area, the touch signal ratio corresponding to each display pixel in each display sub-area includes:
Determining a corresponding touch signal ratio at the boundary of each display subarea based on the corresponding touch signal ratio of each display subarea, as shown in fig. 8 and 9, wherein fig. 8 shows the corresponding touch signal ratio of each display pixel in the local area of the touch display panel, and fig. 9 shows the corresponding touch signal ratio at the boundary of each display subarea in fig. 8, and it is to be noted that the touch signal ratio represents the distance between the conductor and the surface of the touch display panel (i.e., the touch depth information), and the larger the touch signal ratio represents the smaller the distance between the conductor and the surface of the touch display panel (i.e., the smaller the touch depth information), and the smaller the touch signal ratio represents the larger the distance between the conductor and the surface of the touch display panel (i.e., the larger the touch depth information);
Based on the touch signal ratio corresponding to the boundary of each display subarea, determining a maximum value of the touch signal ratio corresponding to each display subarea, a minimum value of the touch signal ratio corresponding to each display subarea, a first display pixel corresponding to the maximum value of the touch signal ratio in each display subarea and a second display pixel corresponding to the minimum value of the touch signal ratio in each display subarea, wherein when the touch signal ratios at the boundaries of two adjacent display subareas are different, a larger value of the touch signal ratio corresponding to the boundary of the two adjacent display subareas is taken as the touch signal ratio at the boundary of the two adjacent display subareas, as shown in fig. 10;
And carrying out gradient processing on the touch signal ratio corresponding to the display pixels between the first display pixels and the second display pixels in each display sub-area based on the maximum value of the touch signal ratio corresponding to each display sub-area, the minimum value of the touch signal ratio corresponding to each display sub-area and the number of display pixels included in each display sub-area, and determining the touch signal ratio corresponding to each display pixel in each display sub-area.
It should be noted that, in the embodiment of the present application, based on the maximum value of the touch signal ratio corresponding to each display sub-area, the minimum value of the touch signal ratio corresponding to each display sub-area, and the number of display pixels included in each display sub-area, performing gradient processing on the touch signal ratio corresponding to the display pixels located between the first display pixel and the second display pixel in each display sub-area, and determining the touch signal ratio corresponding to each display pixel in each display sub-area includes: and carrying out gradient processing on the touch signal ratio corresponding to the display pixels between the first display pixels and the second display pixels in each display subarea based on the touch signal ratio maximum value corresponding to each display subarea, the touch signal ratio minimum value corresponding to each display subarea and the display pixel number between the first display pixels and the second display pixels in each display subarea, so as to obtain the touch signal ratio corresponding to each display pixel in each display subarea, as shown in fig. 11.
Specifically, in one embodiment of the present application, based on a maximum value of a touch signal ratio corresponding to each display sub-area, a minimum value of a touch signal ratio corresponding to each display sub-area, and the number of display pixels included in each display sub-area, a gradient process is performed on a touch signal ratio corresponding to a display pixel located between the first display pixel and the second display pixel in each display sub-area, and determining a touch signal ratio corresponding to each display pixel in each display sub-area includes:
And carrying out gradient processing on the touch signal ratio corresponding to the display pixels between the first display pixels and the second display pixels in each display sub-region by using a linear function (shown in fig. 12) based on the maximum value of the touch signal ratio corresponding to each display sub-region, the minimum value of the touch signal ratio corresponding to each display sub-region and the number of display pixels included in each display sub-region, and determining the touch signal ratio corresponding to each display pixel in each display sub-region.
In another embodiment of the present application, based on a maximum value of a touch signal ratio corresponding to each display sub-area, a minimum value of a touch signal ratio corresponding to each display sub-area, and the number of display pixels included in each display sub-area, performing gradient processing on a touch signal ratio corresponding to a display pixel located between the first display pixel and the second display pixel in each display sub-area, and determining a touch signal ratio corresponding to each display pixel in each display sub-area includes:
And carrying out gradient processing on the touch signal ratio corresponding to the display pixels between the first display pixels and the second display pixels in each display sub-region by utilizing an exponential function (shown in fig. 13) based on the maximum value of the touch signal ratio corresponding to each display sub-region, the minimum value of the touch signal ratio corresponding to each display sub-region and the number of display pixels included in each display sub-region, and determining the touch signal ratio corresponding to each display pixel in each display sub-region.
In the above embodiment, the linear function shown in fig. 12 is shown by way of example of linear decrease, and the exponential function shown in fig. 13 is shown by way of example of exponential decrease, but the present application is not limited thereto, and in other embodiments of the present application, the linear function may be a linear increasing function, and the exponential function may be an exponential increasing function, as the case may be.
In other embodiments of the present application, other functions may be used to perform gradient processing on the touch signal ratio corresponding to the display pixel between the first display pixel and the second display pixel in each display sub-area based on the maximum value of the touch signal ratio corresponding to each display sub-area, the minimum value of the touch signal ratio corresponding to each display sub-area, and the number of display pixels included in each display sub-area, so as to determine the touch signal ratio corresponding to each display pixel in each display sub-area. The application is not limited thereto, as the case may be.
S33: and determining the display brightness of each display pixel in each display sub-area based on the touch signal ratio corresponding to each display pixel in each display sub-area.
Optionally, in an embodiment of the present application, determining, based on a touch signal ratio corresponding to each display pixel in each display sub-area, display brightness of each display pixel in each display sub-area includes: and adjusting the display brightness in the image data source corresponding to each display pixel in each display sub-area based on the touch signal ratio corresponding to each display pixel in each display sub-area to obtain the display brightness of each display pixel in each display sub-area, so that the display brightness of the display pixels corresponding to different touch signal ratios in the touch display panel is different.
For easy understanding, the application is described by taking an achromatic image with a gray scale value of 127 in the data source information corresponding to each display pixel in the touch display panel as an example, but the application is not limited thereto, and the display brightness of each display pixel in the touch display panel depends on the display requirement.
As shown in fig. 14 and 15, fig. 14 shows a representation value of feedback data (i.e., a touch detection signal) of a touch signal before touch is not generated on the surface of the touch display panel, and fig. 15 shows a representation value of display brightness when each display pixel in the touch display panel displays display brightness in data source information. As shown in fig. 16 and 17, fig. 16 shows a representation value of feedback data (i.e., a touch detection signal) of a touch signal when touch occurs on the surface of the touch display panel, and fig. 17 shows a representation value of display brightness displayed by each display pixel in the touch display panel after adjusting display brightness in an image data source corresponding to each display pixel in each display sub-area based on a touch signal ratio corresponding to each display pixel in each display sub-area.
It should be noted that, in the above embodiments, when the touch occurs on the surface of the touch display panel, the touch detection signal of the touch area is reduced compared with the preset touch detection signal, but the application is not limited thereto, and in other embodiments of the application, the touch detection signal of the touch area may be increased compared with the preset touch detection signal when the touch occurs on the surface of the touch display panel, as the case may be.
Optionally, in an embodiment of the present application, when the touch occurs on the surface of the touch display panel, when a touch detection signal of a touch area is reduced compared with a preset touch detection signal, adjusting display brightness in an image data source corresponding to each display pixel in each display sub-area based on a touch signal ratio corresponding to each display pixel in each display sub-area, where obtaining the display brightness of each display pixel in each display sub-area includes:
Multiplying the display brightness in the image data source corresponding to each display pixel in each display sub-area by the value obtained by adding 1 to the touch signal ratio corresponding to each display pixel in each display sub-area to obtain the display brightness of each display pixel in each display sub-area, wherein the calculation formula is as follows: l2=l1 (1+t), where L2 represents the display brightness of each display pixel in each display sub-area, L1 represents the display brightness in the image data source corresponding to each display pixel in each display sub-area, and T represents the touch signal ratio corresponding to each display pixel in each display sub-area.
In another embodiment of the present application, when the touch occurs on the surface of the touch display panel, when the touch detection signal of the touch area is increased compared with the preset touch detection signal, based on the touch signal ratio corresponding to each display pixel in each display sub-area, adjusting the display brightness in the image data source corresponding to each display pixel in each display sub-area, where obtaining the display brightness of each display pixel in each display sub-area includes:
The display brightness of each display pixel in each display sub-area is obtained by multiplying the difference value obtained by subtracting the touch signal ratio corresponding to each display pixel in each display sub-area by the display brightness in the image data source corresponding to each display pixel in each display sub-area, and the calculation formula is as follows: l2=l1 (1-T), where L2 represents the display brightness of each display pixel in each display sub-area, L1 represents the display brightness in the image data source corresponding to each display pixel in each display sub-area, and T represents the touch signal ratio corresponding to each display pixel in each display sub-area.
As can be seen from the above, the touch display panel provided by the embodiment of the application can determine the touch area and adjust the display brightness of the display area corresponding to the touch area based on the touch detection signal, so as to establish a connection between the touch drive and the display drive of the touch display panel, and improve the correlation between the components in the touch display panel.
Moreover, in practical application, when the touch control occurs on the surface of the touch control display panel, the image of the area affected by the conductor on the surface of the touch control display panel is usually covered by the conductor and cannot be seen by the user. Therefore, on the basis of any one of the above embodiments, in one embodiment of the present application, the display brightness of the display pixels corresponding to the region with the stronger touch signal intensity in the touch region is lower, so as to reduce the power consumption of the touch display panel.
It should be noted that, in the embodiment of the present application, when the touch occurs on the surface of the touch display panel, the driving method of the touch display panel does not make the brightness of the display pixels corresponding to the touch area be zero, but gradually decreases along the direction from the boundary of the touch area to the center of the touch area according to the ratio of the touch signals corresponding to the display pixels in the touch area, so that on the basis of reducing the power consumption of the touch display panel, phenomena such as light diffraction are prevented from irradiating the area, which is not contacted by the conductor, in the touch area, and the display quality observed by the user is affected.
In practical use, the palm area is not in direct contact with the surface of the touch display panel when the finger is operated, at this time, a part of the palm area floats above the surface of the touch display panel, when the height of the floating area is lower than the highest touch sensing point (namely, the point with the touch depth information of 0%), the part floating on the surface of the touch display panel has touch response, namely, the touch depth information is gradually reduced from 0% to-100% of the full contact interval. Therefore, in the driving method provided by the embodiment of the application, the effect of brightness change from higher brightness to 0 brightness is displayed in the touch area, so that the aim of remarkably saving power consumption is fulfilled on the premise of not influencing the display effect observed by a user.
It should be further noted that, when the driving method of the touch display panel provided by the embodiment of the application is applied to a mobile phone or a wearable product in a game mode, the driving method has a very good effect of reducing power consumption.
Optionally, in an embodiment of the present application, on the basis of the foregoing embodiment, a sampling frequency of a touch detection signal of the touch display panel is greater than a refresh frequency of a display driving signal of the touch display panel, so as to avoid that, after a conductor on a surface of the touch display panel leaves, a brightness of a target display area of the touch display panel is still the brightness before the conductor on the surface of the touch display panel leaves, which affects display quality of the touch display panel.
In practical application, the touch of the conductor to the surface of the touch display panel may be point touch or may be a sliding track, and a certain time is required to adjust the display pixels at the positions where the conductor leaves to the display brightness corresponding to the image data source, so when the sampling frequency of the touch detection signal of the touch display panel is greater than the refresh frequency of the display driving signal of the touch display panel, but is relatively close to the refresh frequency of the display driving signal of the touch display panel, a certain tailing phenomenon may be generated in the process that the conductor on the surface of the touch display panel slides on the surface of the touch display panel, thereby affecting the display quality.
Optionally, in an embodiment of the present application, the sampling frequency of the touch detection signal of the touch display panel is 3-4 times the refresh frequency of the display driving signal of the touch display panel, so as not to affect the display quality of the touch display panel on the basis of reducing the power consumption of the touch display panel.
Correspondingly, the embodiment of the application also provides display equipment, which comprises a touch display panel and a driving device, wherein the driving device is used for executing the following steps:
acquiring a touch detection signal on the touch display panel;
based on the touch detection signal, determining a touch area and touch signal intensity of each place in the touch area;
And determining the display brightness of each display pixel of a target display area in the touch display panel based on the touch signal intensity of each place in the touch area, wherein the projection of the target display area on the plane of the touch display panel coincides with the projection of the touch area on the plane of the touch display panel.
It should be noted that, in the embodiment of the present application, the driving device may be used to execute the driving method provided in any of the embodiments, and since the specific implementation manner of the driving method is described in each of the embodiments, the description is omitted herein.
Optionally, in an embodiment of the present application, the touch display panel is an in-cell touch display panel, as shown in fig. 18, in an embodiment of the present application, the touch display panel 100 includes a display module 101 and a touch electrode layer 102 located in the display module 101, and the driving device 200 includes: the touch display device comprises a main board 201 and a driving circuit 202, wherein the main board 201 is used for providing data source data corresponding to each display pixel in the touch display panel, the driving circuit 202 is used for driving the display module and the touch module, and specifically, the driving circuit is used for executing:
acquiring a touch detection signal on the touch display panel;
based on the touch detection signal, determining a touch area and touch signal intensity of each place in the touch area;
and determining the display brightness of each display pixel of a target display area in the touch display panel based on the touch signal intensity of each place in the touch area and the image source data corresponding to each display pixel in the touch display panel, wherein the projection of the target display area on the plane of the touch display panel coincides with the projection of the touch area on the plane of the touch display panel.
In the embodiment of the application, when the display device works, the touch detection signal detected on the touch electrode layer is transmitted to the driving circuit, the image source data of the image to be displayed is transmitted to the driving circuit from the main board, after the touch detection signal is acquired by the driving circuit, the data source data corresponding to each display pixel in the touch area is processed based on the touch signal intensity of each place in the touch area, and the display brightness corresponding to each display pixel in the touch area is determined, so that the display module is controlled to display based on the display brightness in the data source data corresponding to each display pixel in the non-touch area and the processed display brightness corresponding to the display pixel in the touch area.
In another embodiment of the present application, the touch display panel is a plug-in touch display panel, and in an embodiment of the present application, as shown in fig. 19, the touch display panel 100 includes a stacked display module 110 and a touch module 120, and the driving device 200 includes: the touch detection circuit 210, the main board 220 and the display driving circuit 210, wherein the touch detection circuit 210 is configured to obtain a touch detection signal on the touch module 120, and determine a touch area and touch signal intensities of all positions in the touch area based on the touch detection signal; the main board 220 is configured to determine display brightness of each display pixel of a target display area in the touch display panel based on touch signal intensity of each place in the touch area and data source data corresponding to each display pixel in the touch display panel, where projection of the target display area on a plane where the touch display panel is located coincides with projection of the touch area on the plane where the touch display panel is located; the display driving circuit 210 is configured to control the display module 110 to display a display image of a target display area based on display brightness of each display pixel of the target display area in the touch display panel.
In the embodiment of the present application, the display driving circuit displays the display image based on the display brightness corresponding to the image source data for the non-touch area in the touch display panel.
On the basis of any of the above embodiments, in one embodiment of the present application, each function in the driving device is implemented by a hardware module, but the present application is not limited thereto, and in other embodiments of the present application, some functions in the driving device may be implemented by a processor chip, where appropriate.
In summary, according to the driving method and the display device for the touch display panel provided by the embodiments of the present application, based on the touch detection signal, the touch area can be determined and the display brightness of the display area corresponding to the touch area can be adjusted, so that a connection is established between the touch driving and the display driving of the touch display panel, the correlation between each component in the touch display panel is improved, and in practical application, when the touch occurs on the surface of the touch display panel, the lower the display brightness of the display pixel corresponding to the touch area is, so as to reduce the power consumption of the touch display panel.
In the description, each part is described in a parallel and progressive mode, and each part is mainly described as a difference with other parts, and all parts are identical and similar to each other.
The features described in the various embodiments of the present disclosure may be interchanged or combined with one another in the description to enable those skilled in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. The driving method of the touch display panel is characterized by comprising the following steps of:
acquiring a touch detection signal on the touch display panel;
based on the touch detection signal, determining a touch area and touch signal intensity of each place in the touch area;
based on the touch signal intensity of each place in the touch area, determining the display brightness of each display pixel of a target display area in the touch display panel, wherein the projection of the target display area on the plane of the touch display panel coincides with the projection of the touch area on the plane of the touch display panel;
Based on the touch signal intensity everywhere in the touch area, determining the display brightness of each display pixel of the target display area in the touch display panel includes:
determining a touch signal ratio of each touch subarea in the touch area based on the touch signal intensity of each place in the touch area, wherein the touch signal ratio is a ratio of the touch signal intensity of each touch subarea to a touch detection signal when no touch is generated in the touch subarea, the touch signal intensity in the same touch subarea is the same, and the touch signal intensities in different touch subareas are different;
Determining the touch signal ratio corresponding to each display pixel in each display sub-area based on the touch signal ratio of each touch sub-area in the touch area and the number of display pixels included in each display sub-area in the target display area, wherein the display sub-areas are in one-to-one correspondence with the touch sub-areas;
determining the display brightness of each display pixel in each display sub-area based on the touch signal ratio corresponding to each display pixel in each display sub-area;
Based on the touch signal ratio of each touch sub-region in the touch region and the number of display pixels included in each display sub-region in the target display region, determining the touch signal ratio corresponding to each display pixel in each display sub-region includes:
based on the touch signal ratio of each touch sub-region in the touch region, determining the touch signal ratio corresponding to each display sub-region in the target display region, wherein the display sub-regions are in one-to-one correspondence with the touch sub-regions;
and determining the touch signal ratio corresponding to each display pixel in each display sub-area based on the touch signal ratio corresponding to each display sub-area and the number of display pixels included in each display sub-area.
2. The driving method according to claim 1, wherein determining the touch area and the touch signal intensity everywhere in the touch area based on the touch detection signal comprises:
Determining a touch area and the touch signal intensity of each place in the touch area based on the touch detection signal and a preset touch detection signal;
the preset touch detection signal is a detection signal obtained when no touch is generated everywhere in the touch area.
3. The driving method according to claim 2, wherein determining the touch area and the touch signal intensity everywhere in the touch area based on the touch detection signal and a preset touch detection signal comprises:
and carrying out zeroing treatment on the touch detection signals of all the positions in the touch area based on the corresponding preset touch detection signals of all the positions in the touch area to obtain the touch signal intensity of all the positions in the touch area.
4. The driving method according to claim 1, wherein determining the touch signal ratio corresponding to each display pixel in each display sub-area based on the touch signal ratio corresponding to each display sub-area and the number of display pixels included in each display sub-area includes:
Determining corresponding touch signal ratios at boundaries of the display subareas based on the touch signal ratios corresponding to the display subareas;
based on the touch signal ratio corresponding to the boundary of each display subarea, determining a maximum value of the touch signal ratio corresponding to each display subarea, a minimum value of the touch signal ratio corresponding to each display subarea, a first display pixel corresponding to the maximum value of the touch signal ratio in each display subarea and a second display pixel corresponding to the minimum value of the touch signal ratio in each display subarea;
And carrying out gradient processing on the touch signal ratio corresponding to the display pixels between the first display pixels and the second display pixels in each display sub-area based on the maximum value of the touch signal ratio corresponding to each display sub-area, the minimum value of the touch signal ratio corresponding to each display sub-area and the number of display pixels included in each display sub-area, and determining the touch signal ratio corresponding to each display pixel in each display sub-area.
5. The driving method according to claim 4, wherein the step of performing gradient processing on the touch signal ratio corresponding to the display pixels between the first display pixels and the second display pixels in each display sub-area based on the maximum value of the touch signal ratio corresponding to each display sub-area, the minimum value of the touch signal ratio corresponding to each display sub-area, and the number of display pixels included in each display sub-area, and the step of determining the touch signal ratio corresponding to each display pixel in each display sub-area includes:
Based on the maximum value of the touch signal ratio corresponding to each display subarea, the minimum value of the touch signal ratio corresponding to each display subarea and the number of display pixels included in each display subarea, carrying out gradient processing on the touch signal ratio corresponding to the display pixels between the first display pixels and the second display pixels in each display subarea by using a linear function, and determining the touch signal ratio corresponding to each display pixel in each display subarea;
Or alternatively, the first and second heat exchangers may be,
And carrying out gradient processing on the touch signal ratio corresponding to the display pixels between the first display pixels and the second display pixels in each display sub-area by utilizing an exponential function based on the maximum value of the touch signal ratio corresponding to each display sub-area, the minimum value of the touch signal ratio corresponding to each display sub-area and the number of display pixels included in each display sub-area, and determining the touch signal ratio corresponding to each display pixel in each display sub-area.
6. The driving method according to claim 1, wherein determining the display brightness of each display pixel in each display sub-area based on the touch signal ratio corresponding to each display pixel in each display sub-area comprises:
And adjusting the display brightness in the image data source corresponding to each display pixel in each display sub-area based on the touch signal ratio corresponding to each display pixel in each display sub-area to obtain the display brightness of each display pixel in each display sub-area.
7. The driving method according to claim 1, wherein a sampling frequency of the touch detection signal of the touch display panel is greater than a refresh frequency of the display driving signal of the touch display panel.
8. The driving method according to claim 7, wherein a sampling frequency of the touch detection signal of the touch display panel is 3 to 4 times a refresh frequency of the display driving signal of the touch display panel.
9. A display device comprising a touch display panel and driving means for performing:
acquiring a touch detection signal on the touch display panel;
based on the touch detection signal, determining a touch area and touch signal intensity of each place in the touch area;
based on the touch signal intensity of each place in the touch area, determining the display brightness of each display pixel of a target display area in the touch display panel, wherein the projection of the target display area on the plane of the touch display panel coincides with the projection of the touch area on the plane of the touch display panel;
Based on the touch signal intensity everywhere in the touch area, determining the display brightness of each display pixel of the target display area in the touch display panel includes:
determining a touch signal ratio of each touch subarea in the touch area based on the touch signal intensity of each place in the touch area, wherein the touch signal ratio is a ratio of the touch signal intensity of each touch subarea to a touch detection signal when no touch is generated in the touch subarea, the touch signal intensity in the same touch subarea is the same, and the touch signal intensities in different touch subareas are different;
Determining the touch signal ratio corresponding to each display pixel in each display sub-area based on the touch signal ratio of each touch sub-area in the touch area and the number of display pixels included in each display sub-area in the target display area, wherein the display sub-areas are in one-to-one correspondence with the touch sub-areas;
determining the display brightness of each display pixel in each display sub-area based on the touch signal ratio corresponding to each display pixel in each display sub-area;
Based on the touch signal ratio of each touch sub-region in the touch region and the number of display pixels included in each display sub-region in the target display region, determining the touch signal ratio corresponding to each display pixel in each display sub-region includes:
based on the touch signal ratio of each touch sub-region in the touch region, determining the touch signal ratio corresponding to each display sub-region in the target display region, wherein the display sub-regions are in one-to-one correspondence with the touch sub-regions;
and determining the touch signal ratio corresponding to each display pixel in each display sub-area based on the touch signal ratio corresponding to each display sub-area and the number of display pixels included in each display sub-area.
10. The display device of claim 9, wherein the touch display panel comprises: the display module and the touch electrode layer are positioned in the display module; the driving device comprises a main board and a driving circuit, wherein the main board is used for providing image source data corresponding to each display pixel in the touch display panel; the driving circuit is used for executing:
acquiring a touch detection signal on the touch display panel;
based on the touch detection signal, determining a touch area and touch signal intensity of each place in the touch area;
and determining the display brightness of each display pixel of a target display area in the touch display panel based on the touch signal intensity of each place in the touch area and the image source data corresponding to each display pixel in the touch display panel, wherein the projection of the target display area on the plane of the touch display panel coincides with the projection of the touch area on the plane of the touch display panel.
11. The display device of claim 9, wherein the touch display panel comprises: the display module and the touch module of range upon range of, drive arrangement includes: the touch detection circuit, the main board and the display driving circuit; wherein,
The touch detection circuit is used for acquiring a touch detection signal on the touch module and determining a touch area and the touch signal intensity of each place in the touch area based on the touch detection signal;
The main board is used for determining display brightness of each display pixel of a target display area in the touch display panel based on touch signal intensity of each place in the touch area and image source data corresponding to each display pixel in the touch display panel, and projection of the target display area on a plane of the touch display panel coincides with projection of the touch area on the plane of the touch display panel;
the display driving circuit is used for controlling the display module to display a display image of a target display area based on display brightness of each display pixel of the target display area in the touch display panel.
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