CN105630234B - Touch display device and touch detection method - Google Patents
Touch display device and touch detection method Download PDFInfo
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- CN105630234B CN105630234B CN201510965131.8A CN201510965131A CN105630234B CN 105630234 B CN105630234 B CN 105630234B CN 201510965131 A CN201510965131 A CN 201510965131A CN 105630234 B CN105630234 B CN 105630234B
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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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- 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
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract
The invention discloses a touch display device and a touch detection method, wherein the touch display device comprises a grid driving circuit and a touch driving circuit, and the grid driving circuit comprises a first circuit and a second circuit; in a frame picture driving period, a display interruption period is set in the driving switching of the first circuit and the second circuit, and the touch driving circuit provides a touch signal in the display interruption period. The touch detection method comprises the following steps: in a frame picture driving period, the grid driving circuit controls the first circuit and the second circuit to provide scanning signals for the touch display device; the touch control driving circuit provides a touch control signal in the display interruption period.
Description
Technical Field
The embodiment of the invention relates to the technical field of touch display, in particular to a touch display device and a touch detection method.
Background
With the popularization of smart devices such as smart phones, touch display panels are also widely used. The conventional touch display device generally needs to perform time-sharing driving on a touch display panel. As shown in fig. 1, each frame of driving period includes a display stage a and a touch stage B, and in the display stage a, the gate driving circuit of the touch display panel provides a display scanning signal for the gate lines of the touch display panel to enable the touch display panel to implement a display function; in the touch stage B, the touch driving circuit of the touch display panel provides a touch driving signal to the touch electrode of the touch display panel, so that the touch display panel can realize a touch function. In the touch display time-sharing driving process, after all gate lines are scanned by each frame, the touch signal is output and scanned, so that the scanning frequency of the gate driving circuit is consistent with the output and scanning frequency of the touch signal, that is, one frame of image is displayed only corresponding to one touch signal output and scanning, which limits the touch scanning frequency and affects the touch reporting rate and the touch sensitivity.
To increase the touch scan frequency, one existing solution is to output the scan by randomly inserting the touch signal during each frame of the display phase. However, in this method, when a touch stage is randomly inserted into the display stage of each frame, only the output signal of the gate driving circuit is turned off, and the input signal of the gate driving circuit still needs to be maintained.
Disclosure of Invention
The invention provides a touch display device and a touch detection method, which are used for increasing touch scanning frequency and touch reporting rate on the basis of ensuring the stability of a display picture.
In a first aspect, an embodiment of the present invention provides a touch display device, including a gate driving circuit and a touch driving circuit, where the gate driving circuit includes a first circuit and a second circuit;
in a frame picture driving period, a display interruption period is set in the driving switching of the first circuit and the second circuit, and the touch driving circuit provides a touch signal in the display interruption period.
In a second aspect, an embodiment of the present invention further provides a touch detection method, where the touch display device according to the first aspect is adopted, and the method includes:
in a frame picture driving period, the grid driving circuit controls the first circuit and the second circuit to provide scanning signals for the touch display device; the touch control driving circuit provides a touch control signal in the display interruption period.
In the invention, in a frame of image driving period, a display interruption period is set in the drive switching of a first circuit and a second circuit of a grid driving circuit, and the touch driving circuit provides a touch signal in the display interruption period, so that the problem of cross striations in a panel display image caused by random insertion of the touch signal output scanning in each frame of image display scanning driving time in order to increase the touch scanning frequency in the prior art is solved.
Drawings
Fig. 1 is a schematic diagram of a touch and display driving timing sequence provided in the prior art;
fig. 2 is a schematic structural diagram of a touch display device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a touch and display driving timing sequence according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another touch display device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a touch and display driving timing sequence of the touch display device shown in FIG. 4;
FIG. 6 is a schematic diagram of another touch and display driving timing sequence of the touch display device shown in FIG. 4;
fig. 7 is a schematic structural diagram of another touch display device according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a touch and display driving timing sequence of the touch display device shown in FIG. 7;
FIG. 9 is a schematic diagram of another timing diagram of touch and display driving of the touch display device shown in FIG. 7.
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.
Fig. 2 is a schematic structural diagram of a touch display device according to an embodiment of the present invention, and as shown in fig. 2, the touch display device includes: the touch control circuit comprises a gate driving circuit 10 and a touch control driving circuit 20, wherein the gate driving circuit 10 comprises a first circuit 11 and a second circuit 12. In one frame of frame driving period, a display interruption period is set in the driving switching of the first circuit 11 and the second circuit 12, and the touch driving circuit 20 provides a touch signal in the display interruption period. Fig. 3 is a schematic diagram of a touch and display driving timing sequence according to an embodiment of the invention. As shown in fig. 4, the touch display device provided in the embodiment of the invention adopts a time-sharing driving method for touch control and display, and the driving period of each frame is described with reference to fig. 2 and fig. 3. In each frame driving period, the first circuit 11 and the second circuit 12 of the gate driving circuit 10 are configured to provide a display scan signal to the gate lines of the touch display panel, and exemplarily, a stage where the first circuit 11 provides the display scan signal is labeled as a first display period S1, and a stage where the second circuit 12 provides the display scan signal is labeled as a second display period S2. When the driving of the first circuit 11 is finished, a display interrupt period is set before the driving of the second circuit 12 is started, the touch driving circuit 20 provides a touch signal in the display interrupt period, and a touch driving period performed in the display interrupt period is referred to as a first touch period S3. In addition, after the display driving scanning of the first circuit 11 and the second circuit 12 is finished for each frame, the touch driving circuit 20 may further provide a touch signal, where the touch driving period is denoted as a second touch period S4.
The invention not only provides the touch driving signal after each frame of display driving is finished, but also sets the display interruption period in the drive switching of the first circuit 11 and the second circuit 12 of the grid driving circuit 10 in one frame of picture driving period, and the touch driving circuit 20 provides the touch signal in the display interruption period. Since the first circuit 11 of the gate driving circuit 10 is driven to be in a complete off state, that is, the input signal and the output signal of the first circuit 11 and the second circuit 12 of the gate driving circuit 10 are both in an off state before the second circuit 12 of the gate driving circuit 10 is driven to be on, the display interrupt period is set in the driving switching of the first circuit 11 and the second circuit 12 of the gate driving circuit 10, and the touch driving circuit 20 provides the touch signal in the display interrupt period, so that the coupling with the input signal of the gate driving circuit 10 is not caused, and therefore, the problem of cross striations occurring in the panel display image can be solved.
On the basis of the foregoing embodiment, optionally, the first circuit 11 includes N first sub-circuits, and the second circuit 12 includes M second sub-circuits, where N and M are positive integers, output ends of cascaded shift registers in the first sub-circuits are respectively connected to corresponding odd-numbered scan lines, and output ends of cascaded shift registers in the second sub-circuits are respectively connected to corresponding even-numbered scan lines; at least one of the driving switching between any two first sub-circuits, the driving switching between any two second sub-circuits, and the driving switching between any one first sub-circuit and any one second sub-circuit is provided with a display interruption period, and the touch driving circuit 20 provides a touch signal in the display interruption period.
Fig. 4 is a schematic structural diagram of another touch display device according to an embodiment of the present invention, and fig. 4 exemplarily sets that the first circuit 11 includes 2 first sub-circuits, respectively, a first sub-circuit 111 and a first sub-circuit 112, and the second circuit 12 includes 2 second sub-circuits, respectively, a second sub-circuit 121 and a second sub-circuit 122. The shift register G cascaded in the first sub-circuit 111 and the first sub-circuit 1122n-1Are respectively connected with the corresponding odd-numbered scanning lines, and the second sub-circuit 121 and the second sub-circuit 122 are cascaded with the shift register G2nThe output ends of the first and second scanning lines are respectively connected with corresponding even-numbered scanning lines, wherein n is a positive integer; at least one of the driving switching between the first sub-circuit 111 and the first sub-circuit 112, the driving switching between the second sub-circuit 121 and the second sub-circuit 122, the driving switching between the first sub-circuit 111 and the second sub-circuit 121 or the second sub-circuit 122, and the driving switching between the first sub-circuit 112 and the second sub-circuit 121 or the second sub-circuit 122 is provided with a display interruption period, and the touch driving circuit 20 provides a touch signal in the display interruption period.
Wherein each first sub-circuit comprises: a first initial signal input terminal, a first clock signal input terminal and a second clock signal input terminal; each second sub-circuit comprises: a second initial signal input terminal, a third clock signal input terminal, and a fourth clock signal input terminal.
As shown in fig. 4, the first initial signal input terminal of the first sub-circuit 111 is labeled as STV1L, the first initial signal input terminal of the first sub-circuit 112 is labeled as STV2L, the second initial signal input terminal of the second sub-circuit 121 is labeled as STV1R, and the second initial signal input terminal of the second sub-circuit 122 is labeled as STV 2R.
On the basis of the above embodiments, optionally, the touch display device may perform touch and display according to the following driving methods: in a frame picture driving period, after a first sub-circuit driving scanning is finished, another first sub-circuit or a second sub-circuit driving scanning is started;
after the second sub-circuit finishes the driving scanning, the other first sub-circuit or the second sub-circuit starts the driving scanning.
Still taking the touch display device shown in fig. 4 as an example, fig. 5 is a schematic diagram of a touch and display driving timing sequence of the touch display device shown in fig. 4, and a driving period of each frame is described with reference to fig. 4 and fig. 5. In fig. 5, the first clock signal input terminal of the first sub-circuit 111 is denoted as CKB1L, the second clock signal input terminal is denoted as CK1L, the first clock signal input terminal of the first sub-circuit 112 is denoted as CKB2L, the second clock signal input terminal is denoted as CK2L, the third clock signal input terminal of the second sub-circuit 121 is denoted as CKB1R, the fourth clock signal input terminal is denoted as CK1R, the third clock signal input terminal of the second sub-circuit 122 is denoted as CKB2R, and the fourth clock signal input terminal is denoted as CK 2R.
Referring to fig. 5, in a frame driving period, the driving scanning sequence of each first sub-circuit and each second sub-circuit is sequentially: the first sub-circuit 111, the second sub-circuit 121, the first sub-circuit 112 and the second sub-circuit 122, that is, after the driving scanning of the first sub-circuit 111 is finished, the second sub-circuit 121 drives the scanning to start; after the second sub-circuit 121 finishes driving scanning, the first sub-circuit 112 starts driving scanning; after the first sub-circuit 112 finishes the driving scanning, the second sub-circuit 122 starts the driving scanning. The scanning sequence of the shift registers in each of the first and second sub-circuits is G1、G5、…；G2、G6、…；G3、G7、…；G4、G8、…。
At least one of the driving switching between the first sub-circuit 111 and the second sub-circuit 121, the driving switching between the second sub-circuit 121 and the first sub-circuit 112, and the driving switching between the first sub-circuit 112 and the second sub-circuit 122 is provided with a display interruption period, and the touch driving circuit provides a touch signal in the display interruption period. For example, fig. 5 sets a display interruption period in the driving switching between the first sub-circuit 111 and the second sub-circuit 121, the driving switching between the second sub-circuit 121 and the first sub-circuit 112, and the driving switching between the first sub-circuit 112 and the second sub-circuit 122, and the touch driving circuit provides a touch signal in the display interruption period. For convenience of description, the touch state control signal is denoted as TP, and when the touch state control signal is at a high level, touch detection is performed, and when the touch state control signal is at a low level, touch detection is stopped. The touch driving circuit provides a touch signal in a display interruption period of driving switching between the first sub-circuit 111 and the second sub-circuit 121, and performs touch detection to be recorded as a touch period T1; providing a touch signal in a display interruption period of the touch driving circuit for driving and switching between the second sub-circuit 121 and the first sub-circuit 112, and performing touch detection to be recorded as a touch period T2; the touch driving circuit provides a touch signal in a display interruption period of the driving switching between the first sub-circuit 112 and the second sub-circuit 122, and performs a touch detection as a touch period T3. In addition, after the display driving scanning of the first circuit 11 and the second circuit 12 is finished for each frame, the touch driving circuit 20 may further provide a touch signal, where the touch driving period is denoted as a touch period T4. When the touch display operation is performed according to the driving timing shown in fig. 5, the touch display device displays a frame corresponding to four times of touch signal output scanning, and if the display scanning frequency is 60Hz, the corresponding touch scanning frequency is 240 Hz. It should be noted that if any one of the driving switching between the first sub-circuit 111 and the second sub-circuit 121, the driving switching between the second sub-circuit 121 and the first sub-circuit 112, and the driving switching between the first sub-circuit 112 and the second sub-circuit 122 sets a display interruption period, the touch driving circuit provides a touch signal in the display interruption period, and then the touch display device displays a frame corresponding to two times of output scanning of the touch signal, and if the display scanning frequency is 60Hz, then the corresponding touch scanning frequency is 120 Hz. If any two of the driving switching between the first sub-circuit 111 and the second sub-circuit 121, the driving switching between the second sub-circuit 121 and the first sub-circuit 112, and the driving switching between the first sub-circuit 112 and the second sub-circuit 122 set a display interruption period, the touch driving circuit provides a touch signal in the display interruption period, and the touch display device displays a frame corresponding to three times of output scanning of the touch signal, and if the display scanning frequency is 60Hz, the corresponding touch scanning frequency is 180 Hz.
It should be noted that, in the exemplary one-frame picture driving period in fig. 5, the driving scanning order of each first sub-circuit and each second sub-circuit is set as follows: the first sub-circuit 111, the second sub-circuit 121, the first sub-circuit 112, and the second sub-circuit 122 are not limited to the embodiment of the present invention, and in other embodiments, the driving scanning sequence of the first sub-circuit 111, the second sub-circuit 121, the first sub-circuit 112, and the second sub-circuit 122 may be appropriately adjusted according to the actual application scenario, which is not limited in the embodiment of the present invention, for example, the driving scanning sequence sequentially includes: a first sub-circuit 111, a first sub-circuit 112, a second sub-circuit 122 and a second sub-circuit 121.
Fig. 6 is a schematic diagram of another touch and display driving timing sequence of the touch display device shown in fig. 4, and a driving period of each frame is described with reference to fig. 4 and 6. A display interrupt period is set in the driving switching between the first sub-circuit 112 and the second sub-circuit 121, and the touch driving circuit provides a touch signal in the display interrupt period. After the driving scanning of the first sub-circuit 111 and the first sub-circuit 112 is finished, the second sub-circuit 121 and the second sub-circuit 122 have a display interruption time before the driving scanning is started (which is equivalent to that after all the odd-numbered scanning lines of the touch display device are finished and before all the even-numbered scanning lines are started), and at this time, each of the first sub-circuits in the first circuit and each of the second sub-circuits in the second circuit in the gate driving circuit are in an off state. And the touch control driving circuit provides a touch control signal during the display interruption time.
As shown in FIG. 6, during the one-frame picture driving period, the trigger signal of the first initial signal input terminal STV1L of the first sub-circuit 111 overlaps the trigger signal of the first initial signal input terminal STV2L of the first sub-circuit 112
And (4) one period. The trigger signal at the second initial signal input terminal STV1R of the second sub-circuit 121 overlaps with the trigger signal at the second initial signal input terminal STV2R of the second sub-circuit 122
And (4) one period. In the touch display device shown in fig. 4, according to the touch and display driving timing shown in fig. 7, the scanning sequence of the shift registers in each of the first sub-circuit and the second sub-circuit is G1、G3、…G2n-1；G2、G4、…G2n。
For convenience of description, the touch state control signal is denoted as TP, and when the touch state control signal is at a high level, touch detection is performed, and when the touch state control signal is at a low level, touch detection is stopped. The touch driving circuit 20 provides a touch signal in a display interruption period of driving switching between the first sub-circuit 112 and the second sub-circuit 121, and performs touch detection to be a touch period T5; in addition, after the display driving scanning of the first circuit 11 and the second circuit 12 is finished for each frame, the touch driving circuit 20 may further provide a touch signal, where the touch driving period is denoted as a touch period T6. When the touch display operation is performed according to the driving timing shown in fig. 6, the touch display device displays a frame corresponding to two times of touch signal output scanning, and if the display scanning frequency is 60Hz, the corresponding touch scanning frequency is 120 Hz.
It should be noted that, in the embodiment of the present invention, the number of the first sub-circuits included in the first circuit and the number of the second sub-circuits included in the second circuit are not limited. The exemplary arrangement of fig. 4-6 is that the first circuit includes 2 first sub-circuits and the second circuit includes 2 second sub-circuits, but is not limited to this embodiment. In other embodiments, can be according toIn practical application scenarios, other numbers of first sub-circuits are arranged in the first circuit, and other numbers of second sub-circuits are arranged in the second circuit. Theoretically, the larger the number of the first sub-circuits included in the first circuit and the number of the second sub-circuits included in the second circuit, the larger the number of the display interruption periods can be set in the driving switching between the first sub-circuits and the second sub-circuits, so that the corresponding touch scanning frequency increases, but the larger the number of the first sub-circuits included in the first circuit and the number of the second sub-circuits included in the second circuit, the larger the number of times of inputting data signals when the touch display panel displays images may be caused to increase, and therefore, it is preferable to set the number of the first sub-circuits included in the first circuit to be 1, 2, or 3, and the number of the second sub-circuits included in the second circuit to be 1, 2, or 3. If the first circuit includes N first sub-circuits and the second circuit includes M second sub-circuits, when N is equal to N>1, corresponding to fig. 6, it is necessary to set the trigger signals at the first initial signal input terminals of the first sub-circuits to be overlapped in sequence
A period of time; when M is>When 1, the trigger signals of the second initial signal input ends of the second sub-circuits are overlapped in sequence
And (4) one period.
Fig. 7 is a schematic structural diagram of another touch display device according to an embodiment of the invention, and as shown in fig. 7, the first circuit 11 includes 3 first sub-circuits, which are respectively a first sub-circuit 111, a first sub-circuit 112, and a first sub-circuit 113, and the second circuit 12 includes 3 second sub-circuits, which are respectively a second sub-circuit 121, a second sub-circuit 122, and a second sub-circuit 123. The shift register G cascaded in the first sub-circuit 111, the first sub-circuit 112, and the first sub-circuit 1132n-1Respectively connected to corresponding odd-numbered rows of scan lines, a shift register G cascaded in the second sub-circuit 121, the second sub-circuit 122 and the second sub-circuit 1232nThe output ends of the first and second scanning lines are respectively connected with corresponding even-numbered scanning lines, wherein n is a positive integer; each first sonAt least one of driving and switching among circuits (including the first sub-circuit 111, the first sub-circuit 112 and the first sub-circuit 113), among second sub-circuits (including the second sub-circuit 121, the second sub-circuit 122 and the second sub-circuit 123), and among the first sub-circuits and the second sub-circuits is provided with a display interruption period, and the touch driving circuit 20 provides a touch signal in the display interruption period.
Wherein each first sub-circuit comprises: a first initial signal input terminal, a first clock signal input terminal and a second clock signal input terminal; each second sub-circuit comprises: a second initial signal input terminal, a third clock signal input terminal, and a fourth clock signal input terminal.
As shown in fig. 7, the first initial signal input terminal of the first sub-circuit 111 is labeled as STV1L, the first initial signal input terminal of the first sub-circuit 112 is labeled as STV2L, the first initial signal input terminal of the first sub-circuit 113 is labeled as STV3L, the second initial signal input terminal of the second sub-circuit 121 is labeled as STV1R, the second initial signal input terminal of the second sub-circuit 122 is labeled as STV2R, and the second initial signal input terminal of the second sub-circuit 123 is labeled as STV 3R.
The touch display panel shown in fig. 7 can perform touch and display in the following driving manner: in a frame picture driving period, after a first sub-circuit driving scanning is finished, another first sub-circuit or a second sub-circuit driving scanning is started;
after the second sub-circuit finishes the driving scanning, the other first sub-circuit or the second sub-circuit starts the driving scanning.
Fig. 8 is a schematic diagram of a touch and display driving timing sequence of the touch display device shown in fig. 7. The driving period of each frame is explained with reference to fig. 7 and 8. In fig. 8, the first clock input terminal of the first sub-circuit 111 is denoted as CKB1L, and the second clock input terminal is denoted as CK 1L; the first clock input terminal of the first sub-circuit 112 is denoted as CKB2L, and the second clock input terminal is denoted as CK 2L; the first clock input terminal of the first sub-circuit 113 is denoted as CKB3L, and the second clock input terminal is denoted as CK 3L; the third clock signal input terminal of the second sub-circuit 121 is marked as CKB1R, and the fourth clock signal input terminal is marked as CKB1RThe signal input end is marked as CK 1R; the third clock signal input terminal of the second sub-circuit 122 is denoted as CKB2R, and the fourth clock signal input terminal is denoted as CK 2R; the third clock input terminal of the second sub-circuit 123 is denoted as CKB3R, and the fourth clock input terminal is denoted as CK 3R. Referring to fig. 9, in a frame driving period, the driving scanning sequence of each first sub-circuit and each second sub-circuit is sequentially: a first sub-circuit 111, a second sub-circuit 121, a first sub-circuit 112, a second sub-circuit 122, a first sub-circuit 113 and a second sub-circuit 123. After the driving scanning of the first sub-circuit 111 is finished, the driving scanning of the second sub-circuit 121 is started; after the second sub-circuit 121 finishes driving scanning, the first sub-circuit 112 starts driving scanning; after the driving scanning of the first sub-circuit 112 is finished, the second sub-circuit 122 drives the scanning to start, after the driving scanning of the second sub-circuit 122 is finished, the driving scanning of the first sub-circuit 113 is started, and after the driving of the first sub-circuit 113 is finished, the driving scanning of the second sub-circuit 123 is started. The scanning sequence of the shift registers in each of the first and second sub-circuits is G1、G7、…；G2、G8、…；G3、G9、…；G4、G10、…；G5、G11、…；G6、G12、…。
At least one of the driving switching between the first sub-circuit 111 and the second sub-circuit 121, the driving switching between the second sub-circuit 121 and the first sub-circuit 112, the driving switching between the first sub-circuit 112 and the second sub-circuit 122, the driving switching between the second sub-circuit 122 and the first sub-circuit 113, and the driving switching between the first sub-circuit 113 and the second sub-circuit 123 has a display interruption period, and the touch driving circuit provides a touch signal in the display interruption period. For example, fig. 8 sets a display interruption period in the driving switching between the first sub-circuit 111 and the second sub-circuit 121, the driving switching between the second sub-circuit 121 and the first sub-circuit 112, the driving switching between the first sub-circuit 112 and the second sub-circuit 122, the driving switching between the second sub-circuit 122 and the first sub-circuit 113, and the driving switching between the first sub-circuit 113 and the second sub-circuit 123, and the touch driving circuit provides a touch signal in the display interruption period. For convenience of description, the touch state control signal is denoted as TP, and when the touch state control signal is at a high level, touch detection is performed, and when the touch state control signal is at a low level, touch detection is stopped. The touch driving circuit provides a touch signal in a display interruption period of driving switching between the first sub-circuit 111 and the second sub-circuit 121, and performs touch detection to be recorded as a touch period t 1; providing a touch signal in a display interruption period of the touch driving circuit for driving and switching between the second sub-circuit 121 and the first sub-circuit 112, and performing touch detection to be recorded as a touch period t 2; providing a touch signal in a display interruption period of the touch driving circuit driving and switching between the first sub-circuit 112 and the second sub-circuit 122, and performing touch detection to be recorded as a touch period t 3; providing a touch signal in a display interruption period of the touch driving circuit driving and switching between the second sub-circuit 122 and the first sub-circuit 113, and performing touch detection to be recorded as a touch period t 4; the touch driving circuit provides a touch signal in a display interruption period of the driving switching between the first sub-circuit 113 and the second sub-circuit 123, and performs touch detection as a touch period t 5. In addition, after the display driving scanning of the first circuit 11 and the second circuit 12 is finished for each frame, the touch driving circuit 20 may further provide a touch signal, where the touch driving period is denoted as a touch period t 6. When the touch display operation is performed according to the driving timing shown in fig. 8, the touch display device displays a frame corresponding to six times of output scanning of the touch signal, and if the display scanning frequency is 60Hz, the corresponding touch scanning frequency is 360 Hz.
It should be noted that when any 1, any 2, any 3, or any 4 of the driving switching between the first sub-circuit 111 and the second sub-circuit 121, the driving switching between the second sub-circuit 121 and the first sub-circuit 112, the driving switching between the first sub-circuit 112 and the second sub-circuit 122, the driving switching between the second sub-circuit 122 and the first sub-circuit 113, and the driving switching between the first sub-circuit 113 and the second sub-circuit 123 are provided with a display interrupt period, the touch driving circuit 20 provides a touch signal in the display interrupt period, and after the display driving scanning of the first circuit 11 and the second circuit 12 in each frame is finished, the touch driving circuit 20 also provides the touch signal, corresponding touch scanning frequencies are respectively: 120Hz, 180Hz, 240Hz, and 300 Hz.
Fig. 9 is a schematic diagram of another driving timing diagram for touch control and display of the touch display device shown in fig. 7, and a driving period of each frame is described with reference to fig. 7 and 9. As shown in FIG. 9, the trigger signal at the first initial signal input STV1L of the first sub-circuit 111 overlaps with the trigger signal at the first initial signal input STV2L of the first sub-circuit 112
And (4) one period. The trigger signal of the first initial signal input terminal STV2L of the first sub-circuit 112 overlaps with the trigger signal of the first initial signal input terminal STV3L of the first sub-circuit 113
And (4) one period. The trigger signal at the second initial signal input terminal STV1R of the second sub-circuit 121 overlaps with the trigger signal at the second initial signal input terminal STV2R of the second sub-circuit 122
One period, the trigger signal of the second initial signal input terminal STV2R of the second sub-circuit 122 overlaps with the trigger signal of the second initial signal input terminal STV3R of the second sub-circuit 123
And (4) one period. In the touch display device shown in fig. 7, according to the touch and display driving timing sequence shown in fig. 9, the scanning sequence of the shift registers in each of the first sub-circuit and the second sub-circuit is G1、G3、G5、…G2n-1；G2、G4、G6、…G2n。
A display interrupt period is set in the driving switching between the first sub-circuit 113 and the second sub-circuit 121, and the touch driving circuit 20 provides a touch signal in the display interrupt period. That is, after the driving scanning of the first sub-circuit 113 is finished, and before the driving scanning of the second sub-circuit 121 is started, there is a display interruption time, and at this time, each of the first sub-circuits in the first circuit in the gate driving circuit and each of the second sub-circuits in the second circuit are both in an off state. And the touch control driving circuit provides a touch control signal during the display interruption time.
For convenience of description, the touch state control signal is denoted as TP, and when the touch state control signal is at a high level, touch detection is performed, and when the touch state control signal is at a low level, touch detection is stopped. The touch driving circuit 20 provides a touch signal in a display interruption period of driving switching between the first sub-circuit 113 and the second sub-circuit 121, and performs touch detection to be recorded as a touch period t 7; in addition, after the display driving scanning of the first circuit 11 and the second circuit 12 is finished for each frame, the touch driving circuit 20 may further provide a touch signal, where the touch driving period is denoted as a touch period t 8. When the touch display operation is performed according to the driving timing shown in fig. 9, the touch display device displays a frame corresponding to two times of touch signal output scanning, and if the display scanning frequency is 60Hz, the corresponding touch scanning frequency is 120 Hz.
The invention also provides a touch detection method, which adopts the touch display device of any of the above embodiments, and the method comprises the following steps: in a frame of picture driving period, the grid driving circuit controls the first circuit and the second circuit to provide scanning signals for the touch display device; the touch driving circuit provides a touch signal in a display interruption period.
The touch detection method provided by the invention not only provides the touch driving signal after each frame of display driving is finished, but also sets the display interruption period in the drive switching of the first circuit and the second circuit of the grid driving circuit in one frame of picture driving period, and the touch driving circuit provides the touch signal in the display interruption period. The first circuit and the second circuit of the grid driving circuit are in a complete off state before the first circuit of the grid driving circuit is driven to be started, namely, the input signals and the output signals of the first circuit and the second circuit of the grid driving circuit are in an off state, so that a display interruption period is set in the drive switching of the first circuit and the second circuit of the grid driving circuit, the touch driving circuit provides touch signals in the display interruption period, and the coupling of the touch signals with the input signals of the grid driving circuit is not caused, so that the problem of cross striations in a panel display image can be solved.
On the basis of the foregoing embodiment, optionally, when the first circuit includes N first sub-circuits and the second circuit includes M second sub-circuits, a display interruption period is set in any two of the first sub-circuit driving switching, any two of the second sub-circuit driving switching, and at least one of any one of the first sub-circuit driving switching and any one of the second sub-circuit driving switching; the touch control driving circuit provides a touch control signal in a display interruption period, wherein N and M are positive integers.
On the basis of the foregoing embodiment, optionally, in the touch display device, each of the first sub-circuits includes: a first initial signal input terminal, a first clock signal input terminal and a second clock signal input terminal; each second sub-circuit comprises: a second initial signal input terminal, a third clock signal input terminal, and a fourth clock signal input terminal;
the polarity of the clock signals of the first clock signal input end and the second clock signal input end is opposite; the polarity of the clock signals at the third clock signal input end and the fourth clock signal input end is opposite; in a frame picture driving period, after a first sub-circuit driving scanning is finished, another first sub-circuit or a second sub-circuit driving scanning is started;
after the second sub-circuit finishes the driving scanning, the other first sub-circuit or the second sub-circuit starts the driving scanning.
Optionally, when N is>1, the trigger signals of the first initial signal input ends of the first sub-circuits are overlapped in sequence
A period of time; when M is>When 1, the trigger signals of the second initial signal input ends of the second sub-circuits are overlapped in sequence
And (4) one period.
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 (7)
1. A touch display device comprises a grid driving circuit and a touch driving circuit, and is characterized in that the grid driving circuit comprises a first circuit and a second circuit;
in a frame picture driving period, a display interruption period is set in the driving switching of the first circuit and the second circuit, and the touch driving circuit provides a touch signal in the display interruption period;
the first circuit comprises N first sub-circuits, the second circuit comprises M second sub-circuits, wherein N and M are positive integers, output ends of cascaded shift registers in the first sub-circuits are respectively connected with corresponding odd-numbered scanning lines, and output ends of cascaded shift registers in the second sub-circuits are respectively connected with corresponding even-numbered scanning lines; at least one of drive switching between any two of the first sub-circuits, drive switching between any two of the second sub-circuits, and drive switching between any one of the first sub-circuits and any one of the second sub-circuits is provided with a display interrupt period, and the touch drive circuit provides a touch signal in the display interrupt period;
n first sub-circuits in the first circuit are sequentially connected with the corresponding odd-numbered scanning lines in a circulating mode; m second sub-circuits in the second circuit are sequentially connected with the corresponding even-numbered scanning lines in a circulating mode;
each of the first sub-circuits includes: a first initial signal input terminal, a first clock signal input terminal and a second clock signal input terminal; each of the second sub-circuits includes: a second initial signal input terminal, a third clock signal input terminal, and a fourth clock signal input terminal; the first clock signal input end, the third clock signal input end and the fourth clock signal input end input signals with different time sequences, and the second clock signal input end, the third clock signal input end and the fourth clock signal input end input signals with different time sequences.
2. The touch display device of claim 1,
in a frame driving period, after the driving scanning of one first sub-circuit is finished, the driving scanning of the other first sub-circuit or the second sub-circuit is started;
and after the second sub-circuit drives and scans, the other first sub-circuit or the second sub-circuit drives and scans to start.
3. The touch display device of claim 1, wherein when N is greater than N>1, the trigger signals of the first initial signal input ends of the first sub-circuits are overlapped in sequence
A period of time; when M is>1, the trigger signals of the second initial signal input ends of the second sub-circuits are overlapped in sequence
And (4) one period.
4. The touch display device of claim 1, wherein the first circuit comprises two of the first sub-circuits and the second circuit comprises two of the second sub-circuits.
5. A touch detection method, using the touch display device according to any one of claims 1 to 4, the method comprising:
in a frame picture driving period, the grid driving circuit controls the first circuit and the second circuit to provide scanning signals for the touch display device; the touch control driving circuit provides a touch control signal in the display interruption period;
when the first circuit comprises N first sub-circuits and the second circuit comprises M second sub-circuits, a display interruption period is set in at least one of any two of the first sub-circuit driving switching, any two of the second sub-circuit driving switching, and any one of the first sub-circuit driving switching and any one of the second sub-circuit driving switching; the touch control driving circuit provides a touch control signal in the display interruption period, wherein N and M are positive integers;
n first sub-circuits in the first circuit are sequentially connected with the corresponding odd-numbered scanning lines in a circulating mode; m second sub-circuits in the second circuit are sequentially connected with the corresponding even-numbered scanning lines in a circulating mode;
in the touch display device, each of the first sub-circuits includes: a first initial signal input terminal, a first clock signal input terminal and a second clock signal input terminal; each of the second sub-circuits includes: a second initial signal input terminal, a third clock signal input terminal, and a fourth clock signal input terminal; the first clock signal input end, the third clock signal input end and the fourth clock signal input end input signals with different time sequences, and the second clock signal input end, the third clock signal input end and the fourth clock signal input end input signals with different time sequences.
6. The touch detection method according to claim 5,
the polarity of the clock signals of the first clock signal input end and the second clock signal input end is opposite; the polarity of the clock signals at the third clock signal input end and the fourth clock signal input end is opposite; in a frame driving period, after the driving scanning of one first sub-circuit is finished, the driving scanning of the other first sub-circuit or the second sub-circuit is started;
and after the second sub-circuit drives and scans, the other first sub-circuit or the second sub-circuit drives and scans to start.
7. The touch detection method according to claim 5, wherein when N is greater than N>1, the trigger signals of the first initial signal input ends of the first sub-circuits are overlapped in sequence
A period of time; when M is>1, the trigger signals of the second initial signal input ends of the second sub-circuits are overlapped in sequence
And (4) one period.
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| CN107424558B (en) * | 2017-06-22 | 2020-04-03 | 上海中航光电子有限公司 | Light-emitting drive circuit and organic light-emitting display panel |
| CN109509414A (en) * | 2017-09-15 | 2019-03-22 | 敦泰电子有限公司 | Embedded display equipment and its scan method |
| CN107861660B (en) | 2017-12-05 | 2021-03-19 | 合肥京东方光电科技有限公司 | Touch detection device and touch detection method thereof |
| TWI735831B (en) * | 2017-12-14 | 2021-08-11 | 矽創電子股份有限公司 | Touch and display driver integration circuit |
| CN107967888B (en) | 2018-01-02 | 2021-01-15 | 京东方科技集团股份有限公司 | Gate drive circuit, drive method thereof and display panel |
| CN108510953B (en) * | 2018-04-17 | 2021-11-26 | 厦门天马微电子有限公司 | Display panel and display device |
| CN111508402B (en) * | 2019-01-30 | 2023-08-01 | 瀚宇彩晶股份有限公司 | Gate drive circuit and touch display device |
| CN113903283B (en) * | 2020-07-06 | 2023-10-13 | 敦泰电子股份有限公司 | Driving system and method of touch display panel |
| CN114093329B (en) * | 2020-07-31 | 2023-05-23 | 京东方科技集团股份有限公司 | Driving method and driving device of display panel and display device |
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| CN112599101A (en) * | 2020-12-18 | 2021-04-02 | 京东方科技集团股份有限公司 | Driving method and device and display device |
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