CN112527144A - Driving method of touch display device and touch display device - Google Patents
Driving method of touch display device and touch display device Download PDFInfo
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- CN112527144A CN112527144A CN202011384882.8A CN202011384882A CN112527144A CN 112527144 A CN112527144 A CN 112527144A CN 202011384882 A CN202011384882 A CN 202011384882A CN 112527144 A CN112527144 A CN 112527144A
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- 238000001514 detection method Methods 0.000 claims abstract description 152
- 230000035484 reaction time Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 16
- 238000013480 data collection Methods 0.000 description 4
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- 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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The invention discloses a driving method of a touch display device and the touch display device, wherein the driving method comprises the following steps: acquiring a first preset time of a display stage between every two adjacent touch control stages in an image frame and a second preset time of the display stage after the last touch control stage in the image frame; determining a first time length of a display stage between every two adjacent touch control stages according to a first preset time length of the display stage between every two adjacent touch control stages, and determining a second time length of the display stage after the last touch control stage in the image frame according to a second preset time length of the display stage after the last touch control stage in the image frame; in the display stage, display driving is carried out on the touch display device according to the first time length and the second time length; in the touch control stage, a touch control driving signal is applied to the touch control display device, so that the touch control sensing reaction time is reduced, and the touch control detection efficiency of the touch control display panel is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method of a touch display device and a touch display device.
Background
Currently, touch display panels are widely used by people, for example, smart phones, tablet computers, and the like all use touch display panels, and the existing embedded touch technologies are mainly classified into two types, one is an On Cell type (On Cell) touch detection circuit and the other is an In Cell type (In Cell) touch detection circuit.
In the prior art, when a touch display panel displays a frame of picture, a touch stage and a display stage are set at intervals, a noise detection stage is set after the last touch driving stage of each touch detection frame for performing noise detection, when a touch operation of a touch subject exists at a certain touch driving stage of the first touch detection frame of the display panel, a detection period T ' when the display panel detects that a touch exists at the touch driving stage is T1' + T2' + T3' + T4', where T1' is a time when the touch detection frame at a position where the touch operation of the touch subject occurs exists, T2' is a secondary detection stage, T3' is a data collection stage, and T4' is a data processing stage. Because the display panel detects that the touch detection period of the touch position of the touch main body is relatively long, when the display panel is applied to vehicle-mounted display, the long touch detection period easily reduces the response error touch speed of the display panel, so that the response of touch detection is very slow, and the touch detection speed cannot meet the requirement of the touch display device.
Disclosure of Invention
The embodiment of the invention provides a driving method of a touch display device and the touch display device so as to improve the touch detection efficiency of a touch display panel.
In a first aspect, an embodiment of the present invention provides a driving method for a touch display device, where each image frame includes a plurality of display stages and a plurality of touch stages; each image frame comprises at least one touch detection frame, each touch detection frame comprises a plurality of touch stages, and the driving method comprises the following steps:
acquiring a first preset time of the display stage between every two adjacent touch control stages in the image frame and a second preset time of the display stage after the last touch control stage in the image frame;
determining a first time length of the display stage between the adjacent touch control stages according to a first preset time length of the display stage between the adjacent touch control stages, and determining a second time length of the display stage after the last touch control stage in the image frame according to a second preset time length of the display stage after the last touch control stage in the image frame;
in the display stage, display driving is carried out on the touch display device according to the first time length and the second time length;
in a touch control stage, applying a touch control driving signal to the touch control display device;
wherein a plurality of the display stages and a plurality of the touch stages in each image frame are alternately distributed; the preset time length of the display stage between every two adjacent touch control stages is greater than the first time length of the display stage between every two adjacent touch control stages, and the second time length of the display stage after the last touch control stage in the image frame comprises a time difference value between the first time length of the display stage between every two adjacent touch control stages and the first preset time length and a second preset time length.
A second aspect. An embodiment of the present invention further provides a touch display device, which is driven by applying the driving method of the touch display device according to any one of the first aspect.
According to the driving method of the touch display panel and the touch display device provided by the embodiment of the invention, the duration of the display stage between the adjacent touch stages is set as the first duration, the display stage after the last touch stage in each image is set as the second duration, and the display panel is driven and displayed in the display stage according to the first duration and the second duration.
Drawings
FIG. 1 is a driving timing diagram of a driving method of a touch display device in the prior art;
FIG. 2 is a timing diagram of a touch detection cycle in the prior art;
fig. 3 is a flowchart illustrating a driving method of a touch display device according to an embodiment of the invention;
FIG. 4 is a driving timing diagram corresponding to the driving method of the touch display device shown in FIG. 3;
FIG. 5 is a timing diagram of a touch detection cycle according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a touch driving circuit according to an embodiment of the invention;
fig. 7 is a flowchart illustrating another driving method of a touch display device according to an embodiment of the invention;
fig. 8 is a driving timing diagram corresponding to another driving method of a touch display device according to an embodiment of the invention;
FIG. 9 is a timing diagram illustrating another touch detection cycle according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a touch detection device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
With the development of display technology, in the prior art, a display control module and a touch control module are integrated on one driver IC, and the display and touch functions of a display panel are realized by performing time-sharing driving on the display panel. Fig. 1 is a driving timing diagram of a driving method of a touch display device in the prior art, and fig. 2 is a timing diagram of a touch detection cycle in the prior art, as shown in fig. 1 and fig. 2, each image frame includes a plurality of display phases (fig. 1 is denoted by P1 'to P11') and a plurality of touch phases, the plurality of touch phases includes a plurality of touch driving phases and at least one noise detection phase (fig. 1 is denoted by a1 'to a4' and denoted by N '), the plurality of display phases and the plurality of touch phases are arranged at intervals, and the noise detection phase N' is arranged after the last touch driving phase of each touch detection frame for performing noise detection. Fig. 1 is a schematic structural diagram of a touch display panel in the prior art, as shown in fig. 1, when a touch operation of a touch subject exists at a certain touch driving stage of a first touch detection frame detected by a conventional display panel, and a detection period T 'of a touch at the touch driving stage detected by the display panel is T' T1'+ T2' + T3'+ T4' as shown in fig. 2, where T1 'is a time when a touch detection frame at a position where the touch operation of the touch subject occurs exists, that is, when a touch electrode of a first touch stage T1' is touched, a touch driving circuit cannot detect the touch at the position, and needs to wait until a second touch detection frame T2 'to detect the touch, that is, the time of T1'. T2' is a secondary detection stage, when the scanning of all touch electrodes in the touch display panel is completed in the first touch detection frame, the finger touches the touch electrode of the first touch area T1' to be detected, i.e. the time of T2' is needed, the time of T2' is also the time of a touch detection frame, however, according to the touch calculation accuracy principle, the erroneous determination caused by the interference caused by jitter and the like is prevented, and T2' is discarded. T3' is a data collection stage, in which touch position data is collected only after the second detection is completed and the third touch detection frame finishes scanning all the touch electrodes in the touch display panel. T4' is a data processing stage, T4' is a data processing and touch position determining stage, and the time of T4' is related to the operation speed of the touch chip. Since the touch detection period of the current display panel at the touch position where the touch subject is detected to be present is relatively long (T ' ═ T1' + T2' + T3' + T4'), when the display panel is applied to the vehicle-mounted display, the long touch detection period easily reduces the speed of the display panel reflecting the false touch, affects the safety performance of the vehicle, and reduces the user experience.
To solve the above technical problem, an embodiment of the present invention provides a driving method of a touch display device, fig. 3 is a schematic flowchart of the driving method of the touch display device according to the embodiment of the present invention, fig. 4 is a driving timing diagram corresponding to the driving method of the touch display device provided in fig. 3, fig. 5 is a timing diagram of a touch detection period provided in the embodiment of the present invention, and fig. 6 is a schematic structural diagram of a touch driving circuit according to the embodiment of the present invention, as shown in fig. 3, fig. 4, fig. 5, and fig. 6, each image frame includes a plurality of display stages and a plurality of touch stages, each image frame includes at least one touch detection frame, each touch detection frame includes a plurality of touch stages, and the driving method includes:
s110, acquiring a first preset time length of a display stage between every two adjacent touch control stages in the image frame and a second preset time length of the display stage after the last touch control stage in the image frame.
For example, as shown in fig. 2, the first preset duration of the display phase between adjacent touch phases in each image frame is t1', and the second preset duration of the display phase after the last touch phase in the image frame is t 2'.
S120, determining a first time length of a display stage between every two adjacent touch control stages according to a first preset time length of the display stage between every two adjacent touch control stages, and determining a second time length of the display stage after the last touch control stage in the image frame according to a second preset time length of the display stage after the last touch control stage in the image frame.
After the first preset time t1' of the display stage between the adjacent touch stages is determined, the first time t1 of the display stage between the adjacent touch stages is determined according to the first preset time t1', and the first time t1 is smaller than the first preset time t1 '. After the first duration t1 of the display stage between each two adjacent touch stages is determined, since the duration of the display stage between the two adjacent touch stages is reduced, there is a certain time for the display panel to perform neither display nor touch detection in the time of a fixed frame of display image, so that the display panel is in a no-motion state, and the duration of the display stage reduced between the two adjacent touch stages is used to compensate the display stage after the last touch stage of an image frame, that is, the second duration t2 of the display stage after the last touch stage in an image frame includes the time difference between the first duration and the first preset duration of the display stage between the two adjacent touch stages and the second preset duration, so as to avoid the no-motion state of the display panel in an image frame.
And S130, in the display stage, performing display driving on the touch display device according to the first time length and the second time length.
Referring to fig. 4, each image frame includes a plurality of display phases (fig. 4 exemplarily shows a plurality of display phases by P1 to P11) and a plurality of touch phases, and the display phases and the touch phases in each image frame are alternately distributed, and in fig. 4, the display phases include P1 to P11 and the touch phases include T1 to T4, in one image display frame, when the touch display panel is in the display phase, the display panel performs the display scanning of P1 to P11, and does not perform the touch scanning, and when the touch display panel is in the touch phase, the display panel sequentially performs the touch scanning of T1 to T4, and does not perform the display scanning.
And performing display driving according to the first duration t1 of the display stage between the determined adjacent touch stages and the second duration t2 of the display stage after the last touch stage in the image frame. Since a plurality of display phases are included in one image frame, for example, in the display phase P2 between the first touch phase a1 and the second touch phase a2, when the display phase is in the P2 display phase, a gray scale voltage is applied to the data line by applying a gate driving signal to the gate of the driving transistor corresponding to the display phase P2, so that the pixel unit corresponding to the display phase is turned on and can display according to the gray scale voltage provided by the source driving module. And the other display stages are analogized in the same way, so that the driving transistors corresponding to the display stages are turned on through the display stages in one frame of image, and the image display is realized through the applied gray scale voltage, so that the display of one frame of image is realized.
And S140, applying a touch driving signal to the touch display device in a touch stage.
Since one image frame includes a plurality of touch stages, as shown in fig. 4, for example, one image frame includes two touch detection frames, when the display panel is in the touch stage, since the display panel includes a plurality of touch areas sequentially arranged along the pixel row direction or the pixel column direction, fig. 6 exemplarily shows 4 touch areas, in one touch detection frame, after SW1 outputs an active level signal, each touch electrode block in Mux1 connected to SW1 receives a touch driving signal to complete touch driving of a first touch area of the first touch detection frame, corresponding to stage a1 in fig. 4, after SW2 outputs an active level signal, each touch electrode block in Mux2 connected to SW2 receives a touch driving signal to complete touch driving of a second touch area of the first touch detection frame, corresponding to stage a2 in fig. 4, after SW3 outputs an active level signal, at this time, each touch electrode block in the Mux3 connected to the SW3 receives a touch driving signal to complete touch driving of the third touch area of the first touch detection frame, which corresponds to stage A3 in fig. 4, and after the SW4 outputs an active level signal, each touch electrode block in the Mux4 connected to the SW4 receives a touch driving signal to complete touch driving of the fourth touch area of the first touch detection frame, which corresponds to stage a4 in fig. 4. The touch driving signals are sequentially applied to the touch electrode blocks of the touch areas, so that the touch driving signals are correspondingly applied to the touch areas one by one in a plurality of touch driving stages of each touch detection frame, and the touch driving of the display panel is realized.
It should be noted that fig. 4 exemplarily shows that one image frame includes two touch detection frames, and it may also be set that the first image frame includes one touch detection frame.
As shown in fig. 5, in the display stage, the touch display panel is set to perform display driving on the touch display device according to the first duration and the second duration, and the time for reducing the display stage between two adjacent touch stages is increased in the display stage after the last touch stage of the current image frame, when there is a touch of the touch subject at the first touch driving stage T1, a period of one touch detection is T in fig. 5, wherein T is T1+ T2+ T3+ T4, T1 is the time of the touch detection frame at the position where the touch operation occurs to the touch main body, T2 is the secondary detection stage, T3 is the data collection stage, T4 is the data processing stage, the sum of the duration T2 of the secondary detection stage and the duration T3 of the data collection stage is an image frame, and the duration T4 of the data processing stage is a fixed duration, which is related to the operation speed of the touch chip. Since the duration for which the display period between two adjacent touch periods is set is reduced from the first preset duration change t1' to the first duration t1, that is, at this time, T1 indicates that the time of the touch detection frame at the position where the touch operation occurs is T1 ═ P3+ P4+ P5+ a2+ A3+ A4+ N ═ 4T1+ a2+ A3+ A4+ N, and compared with the time T1 ═ P2' + P3' + P4' + P5' + a2' + A3' + A4' + N ═ 4T1' + a2+ A3+ A4+ N at the position where the touch operation occurs in the prior art, the time duration of 4(T1' -T1) is reduced, so that the problem of the touch delay is improved, and the effect of improving the touch detection efficiency is achieved, when the touch display panel is applied to a vehicle, the sensitivity of corresponding equipment is improved, the use safety of the whole vehicle is further improved, and the touch detection efficiency of the display panel is improved.
For example, fig. 4 and fig. 5 both illustrate that the touch operation of the touch subject occurs in the first touch stage of the first touch detection frame, and the touch stages in which the touch operation of the touch subject occurs may also be set as the second touch stage a2, the third touch stage A3, and the fourth touch stage a 4.
According to the driving method of the touch display panel provided by the embodiment of the invention, the duration of the display stage between the adjacent touch stages is set as the first duration, the display stage after the last touch stage in each image frame is set as the second duration, and the display panel is driven and displayed in the display stage according to the first duration and the second duration.
Optionally, the duration of the image frame is T, and the first duration of the display phase between each two adjacent touch phases is T1, where T1 is greater than or equal to 0.08T and less than 0.09T.
For example, in conjunction with fig. 2 and 5, when the first preset duration t1 'of the display stage between adjacent touch stages is set to be 9% of the duration of the image frame, the second preset duration t2' of the display stage after the last touch stage in the image frame is set to be 3% of the duration of the image frame, it is determined that the first duration t1 of the display stage between adjacent touch stages is 8% of the duration of the image frame according to the first preset duration of the display stage between adjacent touch stages, and the second duration t2 of the display stage after the last touch stage in the image frame is 12% of the duration of the image frame. If the touch operation of the touch object occurs in the first touch stage of the first touch detection frame, at this time, the touch detection period of the touch display panel corresponding to fig. 2 is T ' T1' + T2' + T3' + T4', T1' + P2' + P3' + P4' + P5' + a2' + A3' + A4' + N-36% + a2' + A3' + A4' + N, the touch detection period of the touch display panel corresponding to fig. 5 is T ' T1+ T2+ T3+ T4, and T1 ═ P2+ P3+ P4+ P5+ a2+ A3+ A4+ N = 32% + a2+ A3+ A4+ N, and the T1 stage is decreased by 4%.
It should be noted that, after the first preset time T1' of the display stage between each two adjacent touch stages is determined to occupy the time of the image frame, the determined first time of the display stage between each two adjacent touch stages is T1, and T1 is greater than or equal to 0.08T and less than 0.09T, so as to avoid the problem that the display of the display panel is abnormal due to the reduced time of the display stage between each two adjacent touch stages, and when the reduced time of the display stage makes up for the second preset time of the display stage after the last touch stage in the image frame, the second preset time is too long.
Optionally, on the basis of the foregoing embodiment, fig. 7 is a flowchart illustrating another driving method of a touch display device according to an embodiment of the present invention, and as shown in fig. 7, applying a touch driving signal to the touch display device in a touch stage includes:
s210, applying a touch driving signal to the touch display device through a touch driving stage.
The plurality of touch phases of the at least one touch detection frame include a plurality of touch driving phases and at least one noise detection phase.
S220, noise detection is carried out through a noise detection stage to obtain a touch detection noise signal.
Because the touch stage comprises a touch driving stage and a noise detection stage, when the display panel is in the touch stage, a touch driving signal is applied to the touch display device in the touch driving stage, and noise detection is performed in the noise detection stage. When the touch operation of a touch main body is detected in the touch driving stage of the first touch detection frame, a touch driving signal is applied to the display panel through the touch driving stage, whether a touch electrode and a voltage to earth in the touch display panel are changed or not is detected according to the touch driving signal, the position where touch occurs is determined, and then noise detection is carried out according to the acquired detection data in the noise detection stage.
Optionally, on the basis of the foregoing embodiment, fig. 8 is a driving timing diagram corresponding to another driving method of a touch display device according to an embodiment of the present invention, as shown in fig. 8, the number of display phases between two adjacent touch phases is N, and a second time duration of the display phase after the last touch phase in an image frame is t2, where 0.03+0.001N ≦ t2 < 0.03+ 0.01N.
For example, as shown in fig. 8, when one touch detection frame is included in one image frame, and the display stages between two adjacent touch stages include P2, P3, P4 and P5, at this time, since the duration of the display stage between two adjacent touch stages is reduced from a first preset duration t1 'to a first duration t1, the reduced display duration 4(t1' -t1) of the display stage between two adjacent touch stages may be increased in the display stage after the last touch stage in the image frame, and if the duration of the second preset duration t2 'of the display stage after the last touch stage in the image frame is set to be 3% of the duration of one image frame, the second duration of the display stage after the last touch stage in the image frame is t2, and t2 is 0.03+4(t1' -t 1). Since the first preset duration t1' of the display stage between the adjacent touch stages can be reduced by a duration in the range of 0.001 to 0.01, the comparison with the second duration t2 of the display stage after the last touch stage in the corresponding image frame in fig. 8 satisfies: t2 is more than or equal to 0.03 and 0.001 multiplied by 4 and less than 0.03 and 0.01 multiplied by 4.
It should be noted that, the duration of the display stage after the last touch stage in the image frame in the example of fig. 8 is 3% of the duration of one image frame, and the duration of the display stage after the last touch stage in the image frame may be set to take other values. In fig. 8, one image frame includes one touch detection frame, the number of display stages between two adjacent touch stages is 4, and when one image frame includes two touch detection frames, as shown in fig. 4, the number of display stages between two adjacent touch stages is 9, for different driving schemes, the second time duration t2 of the display stage after the last touch stage in the image frame in the embodiment of the present invention satisfies the formula: t2 is more than or equal to 0.03+0.001 × 9 and less than 0.03+0.01 × 9, so that the second duration of the display stage after the last touch stage in the image frame is t2 and the number of the display stages between two adjacent touch stages, and the duration of the display stage after the last touch stage in the image frame occupies the duration of one image frame.
Optionally, on the basis of the foregoing embodiment, fig. 9 is a timing diagram of another touch detection period provided in the embodiment of the present invention, and as shown in fig. 9, the driving method further includes: determining a touch area according to the applied touch driving signal, wherein at least part of the touch detection frame comprises the touch area.
For example, referring to fig. 5 and fig. 9, when a finger touches a touch electrode of the first touch area Mux1 corresponding to the first touch phase a1, the touch driving circuit cannot detect the touch, and needs to wait for the second touch detection frame to detect the touch, and then misses the time of T1, where the time of T1 includes, for example, the time of time-sharing scanning the touch electrode of the second touch area Mux2 corresponding to the second touch phase a2, the touch electrode of the third touch area Mux3 corresponding to the third touch phase A3, and the touch electrode of the fourth touch area Mux4 corresponding to the fourth touch phase a 4. After the scanning of all touch electrodes in the touch display panel is completed in the second touch detection frame, the finger touching the first touch area Mux1 is found, i.e. the time of T2 is needed, the time of T2 is also the time of one touch detection frame, however, according to the touch calculation accuracy principle, T2 is discarded. In the third touch detection frame T3, the touch scan signal is applied to the touch electrodes of the first touch area Mux1 corresponding to the first touch stage a1 in a time-sharing manner, and the touch scan signal is applied to the touch electrodes in the second touch area Mux2 corresponding to the second touch stage a2, so that after the scanning of all the touch electrodes of the first touch area Mux1 and the second touch area Mux2 is completed, the touch position data is collected, and since the third touch area Mux3 and the fourth touch area Mux4 do not touch, it is not necessary to provide the touch scan signal to the touch electrodes in the third touch area Mux3 and the fourth touch area Mux4, so that compared with the prior art that the touch position data is collected after the scanning of all the touch electrodes in the touch display panel is completed in the third touch detection frame, the time for scanning the third touch area Mux3 and the fourth touch area Mux4 is reduced. And then entering a stage T4, wherein the stage T4 is a stage of data processing and touch position determination. From the above, the time required for completing the whole process of determining the touch position is T1+ T2+ T3+ T4, and the duration of the T3 stage is reduced, so that the problem of touch delay is further improved, the effect of improving the touch detection efficiency is realized, and when the touch display panel is applied to a vehicle, the sensitivity of corresponding equipment is improved, and the use safety of the whole vehicle is further improved.
It should be noted that fig. 9 only illustrates the application of the first touch scan signal to the touch electrodes of the first touch zone Mux1 and the application of the first touch scan signal to the touch electrodes of the second touch zone Mux2 in a time-sharing manner in the third touch detection frame, but the application is not limited thereto, and those skilled in the art can set the application according to actual situations. In other optional embodiments, the first touch scan signal may be applied to the touch electrodes of the first touch zone Mux1 and the first touch scan signal may be applied to the touch electrodes of the third touch zone Mux3 in a time-sharing manner; or, applying the first touch scan signal to the touch electrodes of the first touch zone Mux1 and applying the first touch scan signal to the touch electrodes of the fourth touch zone Mux4 in a time-sharing manner; or, the first touch scan signal is applied to the touch electrodes of the first touch region Mux1, the first touch scan signal is applied to the touch electrodes of the second touch region Mux2, and the first touch scan signal is applied to the touch electrodes of the third touch region Mux3 in a time-sharing manner; or, applying the first touch scan signal to the touch electrodes of the first touch zone Mux1, applying the first touch scan signal to the touch electrodes of the second touch zone Mux2, and applying the first touch scan signal to the touch electrodes of the fourth touch zone Mux4 in a time-sharing manner; or, the first touch scan signal is applied to the touch electrodes of the first touch zone Mux1, the first touch scan signal is applied to the touch electrodes of the third touch zone Mux3, and the first touch scan signal is applied to the touch electrodes of the fourth touch zone Mux4 in a time-sharing manner. The time sequence of the first touch scan signal applied to the touch electrode of each touch area is not limited in this embodiment.
Optionally, after the ith touch stage of the current touch detection frame is finished, if the touch of the touch subject reappears in the area corresponding to the application of the touch driving signal to the touch display device at the ith touch stage, touch detection is performed according to the touch driving signal applied to the touch display device by the second touch detection frame after the current touch detection frame.
For example, referring to fig. 5, in fig. 5, when a touch of a touch subject is detected in a first touch stage of a first touch detection frame, and after the touch detection frame in which the touch of the touch subject exists is ended, if a touch of the touch subject in the same position as that of the first touch detection frame exists in a second touch detection frame, i.e., in a time period T2, that is, in a time period T2, a touch of the touch subject also exists in a touch stage T1, which indicates that touches of the touch subject in the same position exist in both touch detection frames, therefore, it may be determined that the position in which the touch of the touch subject exists is not caused by a false touch, and at this time, touch detection is performed according to a touch signal applied to the touch display device by the second touch detection frame after the current touch detection frame. The touch detection is carried out by setting the touch signal applied to the touch display device according to the second touch detection frame after the current touch detection frame, so that the touch of a touch main body on the display panel caused by the mistaken touch of the touch display panel can be avoided, and the accuracy of the touch detection result of the display panel is improved.
Optionally, the time duration of each touch stage is the same, and the time duration of the display stage between each adjacent touch stages is the same.
When the display panel displays a frame of image, in a first display stage, a gate driving signal is respectively applied to the gate of the driving transistor corresponding to the first display stage, and a gray scale voltage is applied to the data line, so that the pixel unit corresponding to the first display stage is enabled to be selected and can display according to the gray scale voltage provided by the source electrode driving module. In the second display stage, respectively applying a gate driving signal to the gate of the driving transistor corresponding to the second display stage, applying a gray scale voltage to the data line, so that the pixel unit corresponding to the second display stage is turned on and can be displayed according to the gray scale voltage provided by the source driving module, and so on, in the last display stage in the image frame, respectively applying a gate driving signal to the gate of the driving transistor corresponding to the last display stage, applying a gray scale voltage to the data line, so that the pixel unit corresponding to the last display stage is turned on and can be displayed according to the gray scale voltage provided by the source driving module, and by setting the same duration of each display stage, it is ensured that when the touch display panel is in the display stage in one frame of image, the duration of the driving signal of each display stage is the same at this time, the uniformity of the display panel in displaying a frame of picture is ensured. The principle that the time length of each touch stage is set to be the same is the same as the principle that the time length of the display stage is set to be the same, and the detailed description is omitted here.
Optionally, the duration of the noise detection stage is the same as the duration of the touch driving stage.
Because the touch control stage comprises the touch control driving stage and the noise detection stage, the time length of the noise detection stage and the time length of the touch control driving stage can be set, the touch control time length of the touch control display panel in the touch control stage is reduced, and the display effect of the display panel is ensured.
It should be noted that, as exemplarily shown in fig. 4, the duration of the noise detection phase is the same as the duration of the touch driving phase, and the duration of the noise detection phase may also be set to be longer than the duration of the touch driving phase, so as to ensure that enough detection data is obtained in the noise detection phase for noise detection.
Optionally, the duration of the touch stage is less than the duration of the display stage.
Because human eyes have a certain time window for identifying the image transformation, the time length of the display stage is set to be longer than that of the touch drive stage, so that the visual experience is not influenced.
Optionally, the driving method further includes: and performing touch detection according to the feedback touch sensing signal and the touch detection noise signal.
When the touch display panel is in a touch stage, noise detection is performed in a noise detection period. Assuming that an excitation signal f is preset in the touch stage, in the noise detection stage of the first touch detection frame, the excitation signal with the frequency f is applied and an induction signal is obtained, so that the noise value under the frequency f is detected. In the second touch detection frame detection stage, if a touch operation of the touch subject exists in the touch driving stage at the same position as the first touch detection frame, in the second touch detection frame noise detection stage, an excitation signal with the frequency f is applied and an induction signal is obtained, so that a noise value at the frequency f is detected, and the noise value in the first touch detection frame is the same as the noise value in the second touch detection frame, and at this time, touch detection can be performed according to the feedback touch sensing signal and the touch detection noise signal.
Optionally, referring to fig. 6, the touch display device includes a plurality of touch regions (the exemplary Mux1, Mux2, Mux3, and Mux4 in fig. 6 represent touch regions) sequentially arranged along a pixel row direction or a pixel column direction, and applying the touch driving signal to the touch display device through the touch driving stage includes: and applying touch driving signals to the touch areas in a one-to-one correspondence manner at a plurality of touch driving stages of each touch detection frame.
As shown in fig. 6, when the display panel is in the touch stage, since the display panel includes a plurality of touch regions sequentially arranged along the pixel row direction or the pixel column direction, fig. 6 exemplarily shows 4 touch regions, in the touch detection frame stage, after SW1 outputs an active level signal, each touch electrode block in the first touch region Mux1 connected to SW1 receives a touch driving signal, after SW2 outputs an active level signal, each touch electrode block in the second touch region Mux2 connected to SW2 receives a touch driving signal, after SW3 outputs an active level signal, each touch electrode block in the third touch region Mux3 connected to SW3 receives a touch driving signal, after SW4 outputs an active level signal, each touch electrode block in the fourth touch region Mux4 connected to SW4 receives a touch driving signal, and by sequentially applying the touch driving signal to the touch electrode blocks in the touch regions, the touch driving signals are correspondingly applied to the touch areas in a one-to-one mode in the touch driving stages of each touch detection frame.
Optionally, the touch display device includes a plurality of touch blocks sequentially arranged along a pixel row direction or a pixel column direction; each touch control area group comprises a plurality of touch control areas which are sequentially arranged along the arrangement direction of the touch control area group, and touch control driving signals are applied to the touch control display device through a touch control driving stage, wherein the touch control driving stage comprises the following steps:
and applying touch driving signals to the touch areas in a one-to-one correspondence manner at a plurality of touch driving stages of each touch detection frame.
When one image frame includes a plurality of touch driving frames, touch driving signals may be applied to a plurality of touch areas in a one-to-one correspondence manner at a plurality of touch driving stages of each touch detection frame, as shown in fig. 5, since one image frame includes two touch detection frames, and both the two touch detection frames include touch driving stages a1, a2, A3, and a4, at the first touch driving stage a1, touch driving signals may be applied to touch driving stages a1 of the two touch detection frames, so that touch driving signals may be applied to touch areas with the same arrangement sequence number of different touch areas at the same touch driving stage.
Optionally, the touch display device includes a plurality of display areas sequentially arranged along a pixel column direction, and the touch display device is driven to display through a display stage, including:
and carrying out display driving on a plurality of display areas in a one-to-one correspondence manner in a plurality of display stages of each image frame.
Illustratively, with continuing reference to fig. 4, P1, P2, … … P11 represent a plurality of display phases in one image frame, and when the display panel is in the display phases, the plurality of display phases in each image frame implement display driving of display areas arranged in sequence along the pixel column direction, wherein one display phase represents scanning of several rows of pixels, and in one image frame, the display driving of the plurality of display areas arranged along the pixel column direction is completed.
Optionally, on the basis of the foregoing embodiment, an embodiment of the present invention further provides a touch display device, where the touch display device is driven by applying the driving method of the touch display device described in any of the foregoing embodiments, and the touch display device includes a touch display panel 400 and a driving circuit 500, where the touch display panel includes a liquid crystal panel or an OLED panel, the driving circuit 500 performs display driving on the touch display panel at each display stage, performs touch detection driving on the touch display panel at each touch stage, and performs noise detection on the touch display panel at a noise detection stage.
It should be noted that the touch display device provided in the embodiment of the present invention may be a mobile phone, a tablet computer, a smart wearable device (e.g., a smart watch), or other display devices with a fingerprint identification function known to those skilled in the art, which is not limited in the embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (14)
1. A driving method of a touch display device is characterized in that each image frame comprises a plurality of display stages and a plurality of touch stages; each image frame comprises at least one touch detection frame, each touch detection frame comprises a plurality of touch stages, and the driving method comprises the following steps:
acquiring a first preset time of the display stage between every two adjacent touch control stages in the image frame and a second preset time of the display stage after the last touch control stage in the image frame;
determining a first time length of the display stage between the adjacent touch control stages according to a first preset time length of the display stage between the adjacent touch control stages, and determining a second time length of the display stage after the last touch control stage in the image frame according to a second preset time length of the display stage after the last touch control stage in the image frame;
in the display stage, display driving is carried out on the touch display device according to the first time length and the second time length;
in a touch control stage, applying a touch control driving signal to the touch control display device;
wherein a plurality of the display stages and a plurality of the touch stages in each image frame are alternately distributed; the first preset time length of the display stage between every two adjacent touch control stages is larger than the first time length of the display stage between every two adjacent touch control stages, and the second time length of the display stage after the last touch control stage in the image frame comprises a time difference value between the first time length of the display stage between every two adjacent touch control stages and the first preset time length and a second preset time length.
2. The driving method as claimed in claim 1, wherein the duration of the image frame is T, and the first duration of the display phase between each adjacent touch phases is T1, where 0.08T ≦ T1 < 0.09T.
3. The driving method according to claim 1, wherein the touch phases of at least one of the touch detection frames comprise a touch driving phase and at least one noise detection phase;
applying a touch driving signal to the touch display device through a touch stage comprises:
applying a touch driving signal to the touch display device through a touch driving stage;
and performing noise detection in a noise detection stage to obtain a touch detection noise signal.
4. The driving method according to claim 1, wherein the number of display phases between two adjacent touch phases is N; the second time length of the display stage after the last touch stage in the image frame is t2, wherein t2 is more than or equal to 0.03+0.001N and less than or equal to 0.03+ 0.01N.
5. The driving method according to claim 1, further comprising:
determining a touch area according to the applied touch driving signal;
the at least part of the touch detection frame includes the touch area.
6. The driving method according to claim 1, further comprising:
after the ith touch stage of the current touch detection frame is finished, if the touch of the touch main body reappears in the area corresponding to the touch driving signal applied to the touch display device by the ith touch stage, performing touch detection according to the touch driving signal applied to the touch display device by the second touch detection frame after the current touch detection frame.
7. The driving method according to claim 1, wherein the duration of each touch phase is the same; the display stages between the adjacent touch stages have the same duration.
8. The driving method according to claim 3, wherein the duration of the noise detection phase is the same as the duration of the touch driving phase.
9. The driving method according to claim 1, wherein a duration of the touch phase is less than a duration of the display phase.
10. The driving method according to claim 3, further comprising:
and performing touch detection according to the feedback touch sensing signal and the touch detection noise signal.
11. The driving method according to claim 1, wherein the touch display device comprises a plurality of touch areas sequentially arranged along a pixel row direction or a pixel column direction; the applying a touch driving signal to the touch display device through the touch stage includes:
and adding touch driving signals to the touch areas in a one-to-one correspondence manner at a plurality of touch stages of each touch detection frame.
12. The driving method according to claim 1, wherein the touch display device comprises a plurality of touch blocks arranged in sequence in a pixel row direction or a pixel column direction; each touch control area group comprises a plurality of touch control areas which are sequentially arranged along the arrangement direction of the touch control area group; the applying a touch driving signal to the touch display device through the touch stage includes:
adding touch driving signals to the touch areas in a one-to-one correspondence manner at a plurality of touch stages of each touch detection frame;
and the touch areas with the same arrangement serial numbers of different touch area groups apply touch driving signals at the same touch stage.
13. The driving method according to claim 1, wherein the touch display device comprises a plurality of display areas sequentially arranged along a pixel column direction; the touch display device is subjected to display driving in the display stage; the method comprises the following steps:
and carrying out display driving on the display areas in a one-to-one correspondence manner in a plurality of display stages of each image frame.
14. A touch display device, wherein the touch display device is driven by applying the driving method of the touch display device according to any one of claims 1 to 13.
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