CN112650410A - 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
CN112650410A
CN112650410A CN202011531596.XA CN202011531596A CN112650410A CN 112650410 A CN112650410 A CN 112650410A CN 202011531596 A CN202011531596 A CN 202011531596A CN 112650410 A CN112650410 A CN 112650410A
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China
Prior art keywords
touch
display
area
display panel
sub
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CN202011531596.XA
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CN112650410B (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

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; determining a touch area and the strength of touch signals at each position in the touch area based on the touch detection signal; and determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of the touch signal at each position in the touch area, wherein the projection of the target display area on the plane of the touch display panel is superposed with the projection of the touch area on the plane of the touch display panel. Therefore, a relation 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 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 reduced, 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 disclosure 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 the daily life and work of people, and become an indispensable important tool for people at present.
Currently, in practical applications, most display devices integrate a touch portion, so that the display device has a touch function on the basis of a display function, so as to be suitable for the development of a touch technology. However, when the existing display device integrated with the touch portion works, the display portion and the touch portion are two independent bodies, so how to establish a connection between the display driver and the touch driver in the display device with the touch portion and improve the correlation between the components in the display device becomes a research hotspot of those skilled in the art.
Disclosure of Invention
In order to solve the above problem, embodiments of the present application provide a driving method for a touch display panel, which can establish a relationship between a display driver and a touch driver in a display device having a touch portion, and improve a correlation between components in the display device.
Specifically, an embodiment of the present application provides a driving method for a touch display panel, which includes:
acquiring a touch detection signal on the touch display panel;
determining a touch area and the strength of touch signals at each position in the touch area based on the touch detection signal;
and determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of the touch signal at each position in the touch area, wherein the projection of the target display area on the plane of the touch display panel is superposed with the projection of the touch area on the plane of the touch display panel.
In addition, an embodiment of the present application further provides a display device, including a touch display panel and a driving apparatus, where the driving apparatus is configured to perform:
acquiring a touch detection signal on the touch display panel;
determining a touch area and the strength of touch signals at each position in the touch area based on the touch detection signal;
and determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of the touch signal at each position in the touch area, wherein the projection of the target display area on the plane of the touch display panel is superposed with the projection of the touch area on the plane of the touch display panel.
The driving method and the display device for 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 that the touch drive and the display drive of the touch display panel are linked, the correlation among all components in the touch display panel is improved, and in practical application, when the touch display panel is touched, the lower the display brightness of the display pixel corresponding to the touch area is reduced, so that the power consumption of the touch display panel is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a driving method of a touch display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic view of a touch area in a driving method of a touch display panel according to an embodiment of the present 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 present application;
fig. 4 is a diagram illustrating representative values of touch detection signals at various positions of a touch display panel when no touch occurs on a surface of the touch display panel in a driving method of the touch display panel according to an embodiment of the present disclosure;
fig. 5 is a representation of representative values of touch detection signals at various positions of a touch display panel when a touch occurs on a surface of the touch display panel in a driving method of the touch display panel according to an embodiment of the present application;
fig. 6 is a schematic diagram illustrating intensity of touch signals at various positions of a local portion of the touch display panel when a touch occurs on a surface of the touch display panel in a driving method of the touch display panel according to an embodiment of the present application;
fig. 7 is a schematic diagram illustrating a ratio of touch signals at various parts of a touch display panel when a touch occurs on a surface of the touch display panel in a driving method of the touch display panel according to an embodiment of the present application;
fig. 8 is a schematic diagram illustrating a ratio of touch signals corresponding to display pixels in a local display area when a touch occurs on a surface of the touch display panel in a driving method of the touch display panel according to another embodiment of the present application;
FIG. 9 is a schematic diagram illustrating a ratio of touch signals corresponding to the boundaries of the display sub-regions in FIG. 8;
fig. 10 is a schematic diagram illustrating that when the touch signal ratios corresponding to the boundaries of the display sub-areas shown in fig. 9 are different, the larger value of the touch signal ratios corresponding to the boundaries of the two adjacent display sub-areas is taken as the touch signal ratio at the boundaries of the two adjacent display sub-areas;
fig. 11 is a schematic diagram illustrating a ratio of touch signals corresponding to display pixels in a local display area when a touch occurs on a surface of a touch display panel in a driving method of the touch display panel according to yet another embodiment of the present application;
FIG. 12 is a diagram of a linear function;
FIG. 13 is a schematic diagram of an exponential function;
fig. 14 is a schematic diagram illustrating a representative value of feedback data (i.e., a touch detection signal) of a portion of a touch signal that is not touched on a surface of a touch display panel in a driving method of the touch display panel according to yet another embodiment of the present application;
fig. 15 is a diagram illustrating a display brightness representation value when a part of display pixels in a touch display panel display brightness in data source information before a touch is not generated on a surface of the touch display panel in a driving method of the touch display panel according to yet another embodiment of the present application;
fig. 16 is a representation of a feedback data (i.e., a touch detection signal) of a portion of a touch signal when a touch occurs on a surface of the touch display panel in a driving method of the touch display panel according to yet another embodiment of the present application;
fig. 17 is a schematic diagram of a display luminance representation value displayed by a part of display pixels in the touch display panel after adjusting display luminance 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 in a driving method of the touch display panel according to still 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 technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited to the specific embodiments disclosed below.
As described in the background section, in the existing display device integrated with a touch portion, when the display portion and the touch portion are working, the two independent entities are provided, and how to establish a connection between a display driver and a touch driver in the display device with the touch portion becomes a research hotspot of those skilled in the art.
Specifically, a touch part in the display device is composed of a touch electrode and a touch chip detection circuit, when the display device works, the touch chip detection circuit controls the touch electrode and feeds real-time touch information back to a host chip of the display device, a 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 part and the display part in the display device are driven independently, 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 part, and the power consumption is large.
In view of this, an embodiment of the present invention provides a driving method of a touch display panel, as shown in fig. 1, the method including:
s1: and acquiring a touch detection signal on the touch display panel.
In an embodiment of the present application, acquiring the touch detection signal on the touch display panel includes: monitoring a touch detection signal on the touch display panel in real time so that the touch detection signal can be detected in time 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 method comprises the steps of obtaining a touch detection signal on the touch display panel at a preset frequency, and reducing the power consumption of the touch display panel on the basis of timely detecting the touch detection signal.
S2: and determining a touch area and the strength of the touch signal at each position in the touch area based on the touch detection signal.
Optionally, in an embodiment of the present application, determining, based on the touch detection signal, a touch area and touch signal intensities at various places in the touch area includes: determining a touch area and the strength of touch signals at each position 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 occurs at each position in the touch area.
It should be noted that the principle of the touch display panel for detecting touch is to implement touch detection based on capacitance change between touch electrodes in the touch display panel caused by conductors close to the touch display panel, in a specific application, when the touch display panel is touched, not only the capacitance signal of the area where the conductor directly contacts the touch display panel but also the capacitance signal of the adjacent area centered on the area will change, and therefore, in the embodiment of the present application, as shown in fig. 2 and 3, the touch area includes not only when a touch is generated on the surface of the touch display panel, the touch control display panel comprises a conductor, a direct contact area A of the conductor and the surface of the touch control display panel, and an area B of the conductor, wherein the area B is a certain distance away from the surface of the touch control display panel, and the direct contact area A is determined by the change of the touch control detection signal compared with a preset touch control detection signal corresponding to the touch control detection signal.
Specifically, on the basis of the above embodiments, in one embodiment of the present application, the touch area is an area where the touch detection signal changes compared to the corresponding preset touch detection signal, and in another embodiment of the present application, the touch area is an area where a difference between the touch detection signal and the corresponding preset touch detection signal is greater than a first preset value.
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 intensity of the corresponding touch signal is also different.
On the basis of the foregoing embodiments, in an embodiment of the present application, determining the touch area and the touch signal intensity of each location in the touch area based on the touch detection signal and a preset touch detection signal includes: and performing zeroing processing on the touch detection signals at all positions in the touch area based on the corresponding preset touch detection signals at all positions in the touch area to obtain the touch signal intensity at all positions in the touch area.
In the following, a process of obtaining the touch signal strength at each location in the touch area in the embodiment of the present application is described with reference to a specific embodiment.
For convenience of description, it is assumed that when no touch is generated on the surface of the touch display panel, the touch detection signals at various places in the touch display panel are the same as shown in fig. 4, but in a specific practical application, when no touch is generated on the touch display panel, the touch detection signals at various places in the touch display panel may be the same or different, or may be partially the same or partially different, that is, the preset touch detection signals at various places in the touch display panel may be the same or different or may be partially the same or partially different, which is not limited in this application, and is determined according to the circumstances.
Specifically, in an embodiment of the present application, when no touch is generated on the surface of the touch display panel, the characterization values of the touch detection signals at various positions in the touch display panel are all 900, and continue as shown in fig. 4; when the surface of the touch display panel is touched, the touch detection signals at various positions in the touch display panel are shown in fig. 5, and as can be seen from fig. 5, the touch detection signals in a partial area of the touch display panel are changed, the representation values of the touch detection signals are reduced to 400, 500 or 600, and the area where the touch detection signals are changed is the touch area in the embodiment of the present application; subtracting the corresponding characteristic value of the preset touch detection signal from the characteristic value of the touch detection signal at each location in the touch display panel, that is, performing zeroing processing on the touch detection signal at each location in the touch display panel to obtain a floating variation value of the touch detection signal at each location in a touch area in the touch display panel, as shown in fig. 6, that is, the strength of the touch signal at each location in the touch area.
It should be noted that, in the embodiment of the present application, when the touch detection signals at various positions in the touch display panel are different, or partially the same, and partially different, the above process of obtaining the strength of the touch signal at various positions in the touch area is also applicable, and only in the data processing process at each step, the representation value of the preset touch detection signal corresponding to each touch detection signal is no longer fixed 900, but is the actual representation value of the corresponding preset touch detection signal.
S3: determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of a touch signal at each position in the touch area, wherein the projection of the target display area on the plane of the touch display panel is overlapped 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, in the touch display panel, the density of the display pixels is large, the area of each display pixel is small, and the gap between adjacent display pixels is small, so that when a touch occurs on the surface of the touch display panel, the target display area corresponding to the touch area usually has a large number of display pixels.
Therefore, in an 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 at each location in the touch area includes:
s31: determining a touch signal ratio of each touch sub-area in the touch area based on the strength of each touch signal in the touch area, wherein the touch signal ratio is the ratio of the strength of each touch sub-area to a touch detection signal when no touch signal occurs in the touch sub-area. It should be noted that, in the embodiment of the present application, the touch signal intensities in the same touch sub-area are the same, and the touch signal intensities in different touch sub-areas are different, that is, in the embodiment of the present application, the area with the same touch signal intensity in the touch sub-area is determined as one touch sub-area.
Taking the touch signal strength shown in fig. 6 as an example, a ratio of a floating variation value of each touch detection signal in a region where the touch detection signal in the touch display panel varies and a characterization value of a preset touch detection signal corresponding to the floating variation value is taken as a ratio, so as to obtain a touch signal ratio in the touch region in 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 correspond to the touch subareas one by one.
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 applications, an area of one touch electrode in the touch display panel is usually N times that of the display pixels, and therefore, in the embodiment of the present application, one touch electrode corresponds to a plurality of display pixels. Specifically, in an embodiment of the present application, the touch display panel includes m × n touch sub-regions and x × y display pixels, and each display sub-region includes display pixels of which the number is
Figure BDA0002852255860000081
If the touch display panel includes a 4 × 10 touch electrode matrix, and the resolution of the display area corresponding to the touch electrode matrix is 1080 × 1920, that is, 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 side of one touch electrode is 270 × 192.
Therefore, in an embodiment of the present application, determining, based on the touch signal ratio of each touch sub-area in the touch sub-area, the touch signal ratio corresponding to each display pixel in the display sub-area includes:
determining a touch signal ratio corresponding to each display subarea in the target display area based on the touch signal ratio of each touch subarea in the touch area, as shown in fig. 8, wherein the display subareas correspond to the touch subareas one by one, that is, one display subarea corresponds to one touch signal ratio, and different display subareas correspond to different touch signal ratios;
and determining the touch signal ratio corresponding to each display pixel in each display subarea based on the touch signal ratio corresponding to each display subarea and the number of the display pixels included in each display subarea.
It should be noted that, in the embodiment of the present application, each display sub-region includes a plurality of display pixels, and the number of the display pixels included in different display sub-regions may be the same or different.
Specifically, on the basis of the foregoing embodiment, in an 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 touch signal ratio corresponding to each display sub-area boundary based on the touch signal ratio corresponding to each display sub-area, as shown in fig. 8 and fig. 9, where fig. 8 shows the touch signal ratio corresponding to each display pixel in the local area of the touch display panel, and fig. 9 shows the touch signal ratio corresponding to each display sub-area boundary in fig. 8, it should be noted that the touch signal ratio represents a distance between a conductor and the surface of the touch display panel (i.e., touch depth information), and a larger touch signal ratio represents a smaller distance between the conductor and the surface of the touch display panel (i.e., a smaller touch depth information), and a smaller touch signal ratio represents a larger distance between the conductor and the surface of the touch display panel (i.e., a larger touch depth information);
determining a maximum value of a touch signal ratio corresponding to each display sub-region, a minimum value of a touch signal ratio corresponding to each display sub-region, a first display pixel of the maximum value of the touch signal ratio corresponding to each display sub-region, and a second display pixel of the minimum value of the touch signal ratio corresponding to each display sub-region based on the touch signal ratio corresponding to each display sub-region boundary, where it should be noted that, when the touch signal ratios at the boundaries of two adjacent display sub-regions are different, the larger value of the touch signal ratios corresponding to the boundaries of the two adjacent display sub-regions is taken as the touch signal ratio at the boundaries of the two adjacent display sub-regions, as shown in fig. 10;
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, 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-region, and determining the touch signal ratio corresponding to each display pixel in each display sub-region.
It should be noted that, in this embodiment of the application, 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, performing gradient processing on the touch signal ratio corresponding to the display pixel located between the first display pixel and the second display pixel in each display sub-region, and determining the touch signal ratio corresponding to each display pixel in each display sub-region includes: 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 located between the first display pixel and the second display pixel in each display sub-region, 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-region to obtain the touch signal ratio corresponding to each display pixel in each display sub-region, as shown in fig. 11.
Specifically, in an embodiment of the present application, 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, performing gradient processing on the touch signal ratio corresponding to the display pixel located between the first display pixel and the second display pixel in each display sub-region, and determining the touch signal ratio corresponding to each display pixel in each display sub-region includes:
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, performing gradient processing on the touch signal ratio corresponding to the display pixel located between the first display pixel and the second display pixel in each display sub-region by using a linear function (as shown in fig. 12), and determining the touch signal ratio corresponding to each display pixel of each display sub-region in each display sub-region.
In another embodiment of the present application, 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, performing gradient processing on the touch signal ratio corresponding to the display pixel located between the first display pixel and the second display pixel in each display sub-region, and determining the touch signal ratio corresponding to each display pixel in each display sub-region includes:
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, performing gradient processing on the touch signal ratio corresponding to the display pixel located between the first display pixel and the second display pixel in each display sub-region by using an exponential function (as shown in fig. 13), and determining the touch signal ratio corresponding to each display pixel of each display sub-region in each display sub-region.
In the above embodiment, the linear function shown in fig. 12 is a linear decrease as an example, and the exponential function shown in fig. 13 is an exponential decrease as an example, but the present application does not limit this, and in other embodiments of the present application, the linear function may be a linear increase function, and the exponential function may be an exponential increase function, as the case may be.
In other embodiments of the present application, 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, other functions may be further used to perform gradient processing on the touch signal ratio corresponding to the display pixel located between the first display pixel and the second display pixel in each display sub-region, so as to determine the touch signal ratio corresponding to each display pixel of each display sub-region in each display sub-region. The present 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 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 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 convenience of understanding, the application takes an achromatic color 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 does not limit this, and the display brightness of each display pixel in the touch display panel depends on the display requirement.
As shown in fig. 14 and fig. 15, fig. 14 shows a representation value of feedback data (i.e., a touch detection signal) of a touch signal before touch occurs 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 characteristic value of feedback data (i.e., a touch detection signal) of a touch signal when a touch occurs on the surface of the touch display panel, and fig. 17 shows a characteristic value of display brightness displayed by each display pixel in the touch display panel after adjusting the 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, the description is given by taking an example that when a touch occurs on the surface of the touch display panel, the touch detection signal in the touch area is reduced compared with the preset touch detection signal, but the present application does not limit this example.
Optionally, in an embodiment of the application, when a touch detection signal of a touch area is reduced compared to a preset touch detection signal when a touch occurs on the surface of the touch display panel, based on a 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, so as to obtain 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 denotes the display luminance of each display pixel in each display sub-region, L1 denotes the display luminance in the image data source corresponding to each display pixel in each display sub-region, and T denotes the touch signal ratio corresponding to each display pixel in each display sub-region.
In another embodiment of the present application, when a touch detection signal of a touch area is increased compared to a preset touch detection signal when a touch occurs on the surface of the touch display panel, based on a touch signal ratio corresponding to each display pixel in each display sub-area, adjusting display brightness in an image data source corresponding to each display pixel in each display sub-area to obtain the display brightness of each display pixel in each display sub-area includes:
and multiplying the difference value obtained by subtracting the touch signal ratio corresponding to each display pixel in each display sub-area from 1 by the display brightness in the image data source 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 denotes the display luminance of each display pixel in each display sub-region, L1 denotes the display luminance in the image data source corresponding to each display pixel in each display sub-region, and T denotes the touch signal ratio corresponding to each display pixel in each display sub-region.
As can be seen from the above, the touch display panel provided in the embodiment of the present application may 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 driver and the display driver of the touch display panel, and improve the correlation between the components in the touch display panel.
Moreover, in practical applications, when a touch is generated on the surface of the touch display panel, the image of the area of the touch display panel affected by the conductor is usually covered by the conductor and cannot be seen by a user. Therefore, on the basis of any of the above embodiments, in an embodiment of the present application, the display brightness of the display pixels corresponding to the region with 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 this embodiment of the application, when a touch occurs on the surface of the touch display panel, the driving method of the touch display panel does not make all the luminances of the display pixels corresponding to the touch area zero, but gradually decreases along the boundary of the touch area to the center direction of the touch area according to the touch signal ratio corresponding to each display pixel in the touch area, so as to avoid the phenomenon of light diffraction and the like from irradiating the area not contacted by the conductor in the touch area on the basis of reducing the power consumption of the touch display panel, thereby avoiding the influence on the display quality viewed by the user.
In addition, in practical use, the palm area is not in direct contact with the surface of the touch display panel during finger operation, at this time, a part of the palm area is suspended above the surface of the touch display panel, and when the height of the floating area is lower than the highest touch sensing point (i.e., the point with the touch depth information of 0%), the part floating on the surface of the touch display panel has touch response, i.e., the touch depth information gradually decreases from 0% to-100% of the full contact interval. Therefore, in the driving method provided by the embodiment of the application, the luminance change effect from higher luminance to 0 luminance is presented in the touch area, so that the purpose of saving power consumption significantly is achieved on the premise of not affecting the display effect viewed by the user.
It should be further noted that the driving method of the touch display panel provided in the embodiment of the present application has a very good power consumption reduction effect when applied to a mobile phone or a wearable product in a game mode.
Optionally, on the basis of the foregoing embodiment, in an embodiment of the present application, 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 prevent that after a conductor on a surface of the touch display panel leaves, a luminance of a target display area of the touch display panel is still a luminance before the conductor on the surface of the touch display panel leaves, which affects a display quality of the touch display panel.
It should be noted that, in practical applications, the touch of the conductor on the surface of the touch display panel may be point touch or may also be a sliding track, and a certain time is required to adjust the display pixel at the position where the conductor is away 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 closer to the refresh frequency of the display driving signal of the touch display panel, a certain tailing phenomenon may occur during the sliding of the conductor on the surface of the touch display panel, which affects 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 to 4 times of 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, an embodiment of the present application further provides a display device, which includes a touch display panel and a driving apparatus, where the driving apparatus is configured to perform:
acquiring a touch detection signal on the touch display panel;
determining a touch area and the strength of touch signals at each position in the touch area based on the touch detection signal;
and determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of the touch signal at each position in the touch area, wherein the projection of the target display area on the plane of the touch display panel is superposed 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 apparatus may be configured to execute the driving method provided in any one of the embodiments, and since the specific implementation of the driving method has been described in each of the embodiments, no further description is given here.
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 the 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: a main board 201 and a driving circuit 202, wherein the main board 201 is configured to provide data source data corresponding to each display pixel in the touch display panel, the driving circuit 202 is configured to drive the display module and the touch module, and specifically, the driving circuit is configured to execute:
acquiring a touch detection signal on the touch display panel;
determining a touch area and the strength of touch signals at each position in the touch area based on the touch detection signal;
determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of each touch signal in the touch area and 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 is overlapped with the projection of the touch area on the plane of the touch display panel.
It should be noted that, in this embodiment of the application, when the display device is in operation, a touch detection signal detected on the touch electrode layer is transmitted to the driving circuit, image source data of an image to be displayed is transmitted to the driving circuit from the main board, and after the driving circuit acquires the touch detection signal, the driving circuit processes data source data corresponding to each display pixel in the touch area based on the strength of the touch signal at each position in the touch area, and determines display brightness corresponding to each display pixel in the touch area, 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 an external touch display panel, in the embodiment of the present application, as shown in fig. 19, the touch display panel 100 includes a display module 110 and a touch module 120 that are stacked, and the driving device 200 includes: the touch detection circuit 210 is configured to acquire a touch detection signal on the touch module 120, and determine a touch area and the strength of a touch signal in the touch area based on the touch detection signal; the main board 220 is configured to determine the display brightness of each display pixel in a target display area in the touch display panel based on the touch signal intensity at each location in the touch area and data source data corresponding to each display pixel in the touch display panel, where a projection of the target display area on a plane where the touch display panel is located coincides with a 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 the display image of the target display area based on the display brightness of each display pixel of the target display area in the touch display panel.
In this embodiment, for the non-touch area of the touch display panel, the display driving circuit displays a display image based on the corresponding display brightness in the image source data.
In addition to any of the above embodiments, in an embodiment of the present application, the implementation of each function in the driving apparatus is implemented by a hardware module, but the present application does not limit this, and in other embodiments of the present application, part of the functions in the driving apparatus may also be implemented by a processor chip, as the case may be.
In summary, the driving method and the display device of the touch display panel provided in the embodiment of the present 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 relationship between the touch drive and the display drive of the touch display panel, improve the correlation between the components in the touch display panel, and in practical applications, when a touch occurs on the surface of the touch display panel, reduce the lower the display brightness of the display pixel corresponding to the touch area, so as to reduce the power consumption of the touch display panel.
All parts in the specification are described in a mode of combining parallel and progressive, each part is mainly described to be different from other parts, and the same and similar parts among all parts can be referred to each other.
In the above description of the disclosed embodiments, features described in various embodiments in this specification can be substituted for or combined with each other to enable those skilled in the art to make or use the present 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 (13)

1. A driving method of a touch display panel is characterized by comprising the following steps:
acquiring a touch detection signal on the touch display panel;
determining a touch area and the strength of touch signals at each position in the touch area based on the touch detection signal;
and determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of the touch signal at each position in the touch area, wherein the projection of the target display area on the plane of the touch display panel is superposed with the projection of the touch area on the plane of the touch display panel.
2. The driving method according to claim 1, wherein determining the touch signal intensity of the touch area and the locations within the touch area based on the touch detection signal comprises:
determining a touch area and the strength of touch signals at each position 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 occurs at each position in the touch area.
3. The driving method according to claim 2, wherein determining the touch signal intensity of the touch area and the touch signal intensity of each location in the touch area based on the touch detection signal and a predetermined touch detection signal comprises:
and performing zeroing processing on the touch detection signals at all positions in the touch area based on the corresponding preset touch detection signals at all positions in the touch area to obtain the touch signal intensity at all positions in the touch area.
4. The driving method according to claim 1, wherein determining the display brightness of each display pixel of the target display area in the touch display panel based on the touch signal intensity at each location in the touch area comprises:
determining a touch signal ratio of each touch sub-area in the touch area based on the strength of each touch signal in the touch area, wherein the touch signal ratio is the ratio of the strength of the touch signal of each touch sub-area to a touch detection signal when no touch occurs in the touch sub-area, the strength of the touch signal in the same touch sub-area is the same, and the strength of the touch signal in different touch sub-areas is different;
determining a touch signal ratio corresponding to each display pixel in each display subarea based on a 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 correspond to the touch subareas one by one;
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.
5. The driving method according to claim 4, wherein 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 comprises:
determining a touch signal ratio corresponding to each display subarea in the target display area based on the touch signal ratio of each touch subarea in the touch area, wherein the display subareas correspond to the touch subareas one by one;
and determining the touch signal ratio corresponding to each display pixel in each display subarea based on the touch signal ratio corresponding to each display subarea and the number of the display pixels included in each display subarea.
6. The driving method according to claim 5, wherein determining the touch signal ratio corresponding to each display pixel in each display sub-region based on the touch signal ratio corresponding to each display sub-region and the number of display pixels included in each display sub-region comprises:
determining the corresponding touch signal ratio at the boundary of each display subarea based on the corresponding touch signal ratio of each display subarea;
determining a maximum touch signal ratio value corresponding to each display subarea in each display subarea, a minimum touch signal ratio value corresponding to each display subarea, a first display pixel corresponding to the maximum touch signal ratio value in each display subarea and a second display pixel corresponding to the minimum touch signal ratio value in each display subarea based on a touch signal ratio value corresponding to the boundary of each display subarea;
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, 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-region, and determining the touch signal ratio corresponding to each display pixel in each display sub-region.
7. The driving method according to claim 6, wherein performing gradient processing on the touch signal ratio corresponding to the display pixel located between the first display pixel and the second display pixel in each display sub-region based on the maximum touch signal ratio corresponding to each display sub-region, the minimum 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 comprises:
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, performing gradient processing on the touch signal ratio corresponding to the display pixels positioned 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 the like, or, alternatively,
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, 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 subarea by using an exponential function, and determining the touch signal ratio corresponding to each display pixel in each display subarea.
8. The driving method according to claim 4, wherein determining the display brightness of each display pixel in each display sub-region based on the touch signal ratio corresponding to each display pixel in each display sub-region 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.
9. 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.
10. The driving method as claimed in claim 9, wherein 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.
11. A display device comprising a touch display panel and a driving means, the driving means being configured to perform:
acquiring a touch detection signal on the touch display panel;
determining a touch area and the strength of touch signals at each position in the touch area based on the touch detection signal;
and determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of the touch signal at each position in the touch area, wherein the projection of the target display area on the plane of the touch display panel is superposed with the projection of the touch area on the plane of the touch display panel.
12. The display device according to claim 11, wherein the touch display panel comprises: the display module comprises a display module and a touch electrode layer 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 drive circuit is used for executing:
acquiring a touch detection signal on the touch display panel;
determining a touch area and the strength of touch signals at each position in the touch area based on the touch detection signal;
determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of each touch signal in the touch area and 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 is overlapped with the projection of the touch area on the plane of the touch display panel.
13. The display device according to claim 11, wherein the touch display panel comprises: range upon range of display module assembly and touch-control module assembly, drive arrangement includes: the touch control detection circuit comprises a touch control detection circuit, a main board and a display driving circuit; wherein the content of the first and second substances,
the touch detection circuit is used for acquiring a touch detection signal on the touch module and determining a touch area and the strength of each touch signal in the touch area based on the touch detection signal;
the main board is used for determining the display brightness of each display pixel of a target display area in the touch display panel based on the strength of each touch signal in the touch area and image source data corresponding to each display pixel in the touch display panel, and the projection of the target display area on the plane of the touch display panel is superposed with the 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 the display image of the target display area based on the display brightness of each display pixel of the target display area in the touch display panel.
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