CN110554806A - driving method and device of touch display panel and touch display panel - Google Patents
driving method and device of touch display panel and touch display panel Download PDFInfo
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- CN110554806A CN110554806A CN201910837518.3A CN201910837518A CN110554806A CN 110554806 A CN110554806 A CN 110554806A CN 201910837518 A CN201910837518 A CN 201910837518A CN 110554806 A CN110554806 A CN 110554806A
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- 230000000694 effects Effects 0.000 description 4
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- 230000010354 integration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
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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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Abstract
The invention provides a driving method and device of a touch display panel and the touch display panel, belongs to the technical field of display, and can solve the problem that the touch performance is influenced due to the fact that the existing touch time is too short. The driving method of the touch display panel of the invention, the touch display panel includes: the touch control device comprises a plurality of grid lines, a plurality of touch control drive wires and a source electrode drive chip; the grid line is divided into a plurality of grid line groups; the driving method comprises the following steps: driving a display frame of the touch display panel to display frame by frame; the driving method comprises the following steps of for each frame of display picture: a display stage: scanning the plurality of grid lines line by line along the direction departing from the source electrode driving chip; the scanning time of each grid line group is sequentially increased along the direction departing from the source electrode driving chip; and (3) a touch control stage: and writing touch driving signals into the touch driving lines line by line.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a driving method and device of a touch display panel and the touch display panel.
Background
With the continuous development of display technologies, users have higher and higher requirements for high resolution, light weight, and narrow frame of a touch display module, and therefore, integration of Touch and Display Driver Integration (TDDI) has become a development trend in the display field.
The inventor finds that at least the following problems exist in the prior art: at present, in a TDDI product, each row of gate lines is scanned line by line according to the same scanning time, and simultaneously, each row of pixel units is charged line by line through data lines, however, the distance between each row of pixel units and a source driving chip is different, due to the existence of a load, the actual charging time of each row of pixel units is not different, and the farther away from the source driving chip, the larger the load is, the shorter the actual charging time of the pixel units is. In order to ensure the display effect of each row of pixel units, a longer scanning time is required to satisfy the charging time of each row of pixel units, and therefore, a longer display time is required. Thus, although the display effect of each row of pixel units is ensured, the longer display time extrudes the touch time of the TDDI product, so that the touch time is shorter in the time of driving one frame of display picture. The shorter touch time has a serious impact on the touch performance of the TDDI product.
disclosure of Invention
the present invention is directed to at least one of the technical problems in the prior art, and provides a driving method and device for a touch display panel, and a touch display panel.
the technical solution to solve the technical problem of the present invention is a driving method of a touch display panel, where the touch display panel includes: the touch control device comprises a plurality of grid lines, a plurality of touch control drive wires and a source electrode drive chip; the grid lines are divided into a plurality of grid line groups; the driving method includes: driving a display frame of the touch display panel to display frame by frame; wherein, for each frame display picture, the driving method comprises the following steps:
A display stage: scanning the plurality of grid lines line by line along a direction departing from the source electrode driving chip; the scanning time of each grid line group is sequentially increased along the direction departing from the source electrode driving chip;
And (3) a touch control stage: and writing touch driving signals into the touch driving lines line by line.
optionally, each gate line group includes one gate line;
A display stage: scanning the plurality of grid lines line by line along a direction departing from the source electrode driving chip; and the scanning time of each grid line is sequentially increased along the direction departing from the source electrode driving chip.
Alternatively, the incremental scanning time between any two adjacent gate lines is equal.
Optionally, each gate line group includes a plurality of gate lines;
A display stage: scanning the plurality of grid lines line by line along a direction departing from the source electrode driving chip; and the scanning time of each grid line group is sequentially increased along the direction departing from the source electrode driving chip.
Optionally, the number of the gate lines in each of the gate line groups is equal.
Optionally, the scanning time of each gate line in the same gate line group is equal, and the scanning time of the gate lines in different gate line groups is not equal.
Optionally, the incremental scanning time of any two of the gate line groups is equal.
The technical solution to solve the technical problem of the present invention is a driving apparatus for a touch display panel, the touch display panel including: the touch control device comprises a plurality of grid lines, a plurality of touch control drive wires and a source electrode drive chip; the grid lines are divided into a plurality of grid line groups; the driving device includes: the driving device is used for driving the display picture of the touch display panel to display frame by frame; wherein, for each frame display picture, the driving device comprises:
The display driving unit is used for scanning the grid lines line by line along the direction departing from the source electrode driving chip; the scanning time of each grid line group is sequentially increased along the direction departing from the source electrode driving chip;
And the touch driving unit is used for writing touch driving signals into the touch driving lines line by line.
the technical solution to solve the technical problem of the present invention is a touch display panel, which includes the driving device of the touch display panel provided above.
Optionally, the touch display panel comprises an in-cell touch display panel.
Drawings
FIG. 1 is a timing diagram illustrating a driving method of a touch display panel according to the prior art;
Fig. 2 is a flowchart of a driving method of a touch display panel according to an embodiment of the present invention;
Fig. 3 is a timing diagram of a driving method of a touch display panel according to an embodiment of the invention;
Fig. 4 is a timing diagram illustrating another driving method of a touch display panel according to an embodiment of the invention;
Fig. 5 is a schematic structural diagram of a driving device of a touch display panel according to an embodiment of the present invention.
Wherein the reference numerals are:
501-display driving unit, and 502-touch driving unit.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
At present, a touch display panel generally scans each row of gate lines line by line according to the same scanning time, and charges each row of pixel units line by line through data lines. Taking a touch display panel with a resolution of 1080 x 1920 as an example, a typical refresh rate is 60 hertz (Hz), i.e., a driving time corresponding to each frame of display screen is 16.6 milliseconds (ms), wherein the touch time is 2.0ms, the display time is 14.6ms, a scanning time allocated to a gate line corresponding to each row of pixel units is 7.6 microseconds (μ s), i.e., a theoretical charging time of each row of pixel units is 7.6 μ s. The mode of even distribution can satisfy the normal display effect and the stability of the display. Fig. 1 is a timing diagram of a driving method of a touch display panel in the prior art, as shown in fig. 1, from a 1 st row of gate lines to a 1920 th row of gate lines, theoretically, the scanning time of each row is 7.6 μ s, and due to the existence of a load, the farther from a source driver chip, the larger the load, the longer the delay of the corresponding charging time. For example, the charging time delay corresponding to the pixel unit controlled by the gate line in the row 1 is shorter and substantially the same as the scanning time because the pixel unit is closer to the source driver chip, that is, the actual charging time is 7.6 μ s, and the charging time delay corresponding to the pixel unit controlled by the gate line in the row 1920 is more serious because the pixel unit is farther from the source driver chip, and the actual charging time is only 5 μ s. It can be seen that the charging time of 5 μ s for each row of pixel units can satisfy the normal display effect, the longer charging time for the pixel units controlled by the gate line closer to the source driver chip causes the waste of the display time, and meanwhile, the longer display time extrudes the touch time, so that the touch time is shorter, the normal touch time of 2.5ms cannot be achieved, and the touch performance of the touch display panel is seriously affected. It can be understood that there is a load between the gate line and the gate driving line, which also has a certain delay, but the load is relatively small, and due to the requirement of narrow frame and high resolution, the array substrate row driving (GOA) technology is already the mainstream circuit design scheme, so the delay is much smaller.
in order to solve the problem that the touch time of a touch display panel is short in the prior art, embodiments of the present invention provide a driving method and device for a touch display panel, and a touch display panel. The following describes in detail a driving method and apparatus for a touch display panel and the touch display panel provided in the embodiments of the present invention with reference to the drawings, taking a touch display panel with a resolution of 1080 × 1920 and a refresh rate of 60Hz as an example.
example one
The touch display panel provided by the embodiment of the invention comprises: the touch control device comprises a plurality of grid lines, a plurality of data lines, pixel units in cross areas of the grid lines and the data lines, a plurality of touch control driving lines, a plurality of touch control induction lines, touch control units in cross areas of the touch control driving lines and the touch control induction lines, a source electrode driving chip and a touch control driving chip, wherein the source electrode driving chip and the touch control driving chip can be integrated into a whole or can be used independently. The plurality of data lines may be connected to the source driving chip, and may provide data voltages to the pixel units through the plurality of data lines and charge the pixel units in each row. The touch driving lines and the touch sensing lines can be connected with the driving chip, touch driving signals are provided for the touch unit through the touch driving lines, and then the position where touch occurs is determined by detecting the change of capacitance data in the touch sensing lines. Therefore, the display function and the touch control function of the touch control display panel are realized, and the display frame of the touch control display panel is displayed frame by frame. In the embodiment of the present invention, the gate lines may be divided into a plurality of gate line groups. It should be noted that, the resolution of the pixel units is generally much greater than that of the touch units, and therefore, in the embodiment of the present invention, each of the plurality of pixel units may correspond to one touch unit.
Fig. 2 is a flowchart of a driving method of a touch display panel according to an embodiment of the present invention, as shown in fig. 2, the driving method includes the following steps for each frame of display screen:
S201, a display stage: scanning the plurality of grid lines line by line along the direction departing from the source electrode driving chip; and the scanning time of each grid line group is sequentially increased along the direction departing from the source electrode driving chip.
in step S201, during the display phase of one frame of display image, the gate lines are sequentially scanned along the direction away from the source driver chip, i.e. in the order from the 1 st gate line to the 1920 st gate line. Correspondingly, the source driving chip can provide data voltage for each row of pixel units line by line through the data lines and charge each row of pixel units, thereby realizing the display of the whole picture. The 1920 gate lines may be divided into a plurality of gate line groups, each gate line group includes at least one gate line, the scanning time of the gate lines in each gate line group may be sequentially increased, and the specific grouping manner of the gate lines will be described in detail in the following embodiments. The scanning time of the gate lines can be the sum of the scanning time of each gate line in the gate line group, and the scanning time of the gate line group which is farther away from the source driving chip is longer, so that the corresponding pixel unit can have enough charging time, and the normal display of each pixel unit is ensured. Of course, the sum of the scanning times of the gate line groups is determined by the individual scanning times of the gate lines, and therefore, the scanning times of the gate line groups can also be characterized by the scanning times of the individual gate lines in the gate line groups.
S202, a touch stage: and writing touch driving signals into the touch driving lines line by line.
In the step S202, in the touch stage of one frame of display image, the touch driving signals may be written to the touch driving lines line by line according to the driving method in the prior art, and the capacitance change of the touch unit is read through the touch sensing lines to determine the position where touch occurs, so as to implement the touch function of the touch display panel.
it should be noted that, the steps S201 and S202 may be performed in the order shown in fig. 2, or may be performed in other orders, and the order is not limited in this embodiment. It should be further noted that in S202, the writing sequence of the driving signals in the touch stage may write the driving signals to the touch driving lines line by line along a direction away from the touch driving chip, or write the driving signals in other sequences, which is not limited in the embodiment of the present invention,
In the embodiment of the invention, the distance between each row of pixel units and the source driving chip is different, due to the existence of the load, the actual charging time of each row of pixel units has a certain delay compared with the scanning time, and the longer the distance from the source driving chip is, the longer the delay is, the scanning time of each gate line group can be controlled to be sequentially increased progressively, so that the pixel units closer to the source driving chip can save the scanning time, and the pixel units farther from the source driving chip can be ensured to have enough charging time. For a frame of display image, the display time can be saved and the touch time can be increased while ensuring the normal display of the display image, so that the touch performance of the touch display panel can be improved, and the influence on the touch accuracy, linearity, signal-to-noise ratio and other performances of the touch display panel due to the over-short touch time can be avoided.
In one possible implementation, only one gate line may be included in each gate line group. Fig. 3 is a timing diagram of a driving method of a touch display panel according to an embodiment of the invention, as shown in fig. 3, in a display stage: and scanning each row of gate lines line by line according to preset scanning time along a direction departing from the source driving chip, namely the direction from the 1 st gate line to the 1920 th gate line, and the scanning time of each gate line is increased gradually in sequence. Specifically, as shown in fig. 3, since the actual charging time of the pixel unit controlled by the 1920 th gate line farthest from the source driver chip is 5 μ s, the normal display of the whole display screen can be satisfied. Meanwhile, the 1 st grid line is closer to the source electrode driving chip, so that the scanning time of the 1 st grid line is almost not delayed from the charging time of the corresponding pixel unit. Therefore, the scanning time of the 1 st gate line can be set to 5 μ s, and the actual charging time of the pixel unit controlled by the corresponding 1 st gate line is also 5 μ s. According to the calculation of the delay time in the prior art, the delay between the scanning time of the 1920 th gate line and the charging time of the corresponding pixel unit is 2 μ s, so that the scanning time of the 1920 th gate line can be set to be at least 7 μ s, and the charging time of the corresponding pixel unit can be ensured to be at least 5 μ s. The gate lines between the 1 st gate line and the 1920 th gate line can ensure that the corresponding pixel units have enough charging time by adjusting the respective scanning time, so that the normal display of a frame of display picture is ensured.
Based on the above possible implementation manners, in a preferred manner, the incremental scanning time between any two adjacent gate lines from the 1 st gate line to the 1920 th gate line is equal. As shown in fig. 3, the scanning time of the 1 st gate line is set to 5 μ s, the scanning time of the 1920 th gate line is set to 7 μ s, and by calculating that (7-5)/1920 is approximately equal to 1 nanosecond (ns), the scanning time of each gate line is increased by about 1ns from the 1 st gate line to the 1920 th gate line until the scanning time of the 1920 th gate line is 7 μ s, for convenience of understanding, the increasing time between two adjacent gate lines in the embodiment of the present invention is set to 1ns, which is slightly longer than 1ns in practice, so as to ensure that the scanning time of the 1920 th gate line is 7 μ s. That is, the scanning time of the 1 st gate line is 5 μ s, the scanning time of the 2 nd gate line is 5 μ s +1ns, the scanning time of the 3 rd gate line is 5 μ s +2ns, and so on, the scanning time of the 1919 gate line is 5 μ s +1999ns, and the scanning time of the 1920 th gate line is 5 μ s +2000 ns. As can be seen from fig. 3, the display time of one frame of the display screen of the touch display panel is: 5.001 mus +5.002 mus +5.003 mus + … … +6.999 mus is equal to about 11.6ms, so that the corresponding touch time is 14.6ms-11.6ms and equal to 3.0ms, and compared with the touch time of 2.0ms driven by a driving method in the prior art, the touch time is greatly prolonged while the pixel units of each row are ensured to have enough charging time, so that the touch performance of the touch display panel can be ensured. And the incremental scanning time between any two adjacent grid lines is equal, so that the scanning time of each grid line can be conveniently set.
In another possible implementation manner, each gate line group may include a plurality of gate lines. Fig. 4 is a timing diagram of another driving method of a touch display panel according to an embodiment of the invention, as shown in fig. 4, in a display stage: scanning each row of gate lines line by line according to preset scanning time along a direction departing from the source driver chip, namely the direction from the 1 st gate line to the 1920 th gate line, wherein the scanning time of each gate line group is increased gradually in sequence. Specifically, all the gate lines may be divided into 4 gate line groups, and the number of the gate lines in each gate line group is equal, that is, each gate line group includes 480 gate lines, the scanning time of each gate line in the 1 st gate line group is set to 5.5 μ s, and the scanning time of each gate line in the 4 th gate line group is set to 7.0 μ s. The 2 nd gate line group and the 3 rd gate line group in the middle can also ensure that the corresponding pixel units have enough charging time by adjusting the scanning time of the gate lines in the respective gate line groups, thereby ensuring the normal display of a frame of display picture.
Based on the above possible implementation manners, in a preferred manner, the incremental scanning time of any two gate line groups is equal. Specifically, the scanning time of each gate line in the 1 st gate line group is set to 5.5 μ s, the scanning time of each gate line in the 2 nd gate line group is set to 6.0 μ s, the scanning time of each gate line in the 3 rd gate line group is set to 6.5 μ s, and the scanning time of each gate line in the 4 th gate line group is set to 7.0 μ s. As can be seen from fig. 4, the display time of one frame of the display screen of the touch display panel is: (5.5 μ s +6.0 μ s +6.5 μ s +7.0 μ s) 480 equals 12.0 ms. Therefore, the corresponding touch time is 14.6ms-12.0ms and is equal to 2.6ms, and compared with the display time of 2.0ms driven by a driving mode in the prior art, the touch time is greatly increased while the pixel units in each row are ensured to have enough charging time, so that the touch performance of the touch display panel can be ensured. And the incremental scanning time between any two adjacent grid line groups is equal, so that the scanning time of each grid line can be conveniently set.
Example two
Based on the same inventive concept, an embodiment of the present invention provides a driving apparatus for a touch display panel, where the touch display panel includes: the touch control device comprises a plurality of grid lines, a plurality of touch control drive wires and a source electrode drive chip; the grid line is divided into a plurality of grid line groups; the drive device includes: a driving device for driving the display frame of the touch display panel to display frame by frame; wherein, for each frame of the display screen, as shown in fig. 5, the driving device comprises: a display driving unit 501 and a touch driving unit 502.
The display driving unit 501 is configured to scan the plurality of gate lines line by line along a direction away from the source driver chip; and the scanning time of each grid line group is sequentially increased along the direction departing from the source electrode driving chip.
The touch driving unit 502 is configured to write touch driving signals to the touch driving lines line by line.
it can be understood that the driving apparatus for a touch display panel according to the embodiment of the present invention is used to implement steps S201 to S202 in the driving method according to the above embodiment, and the implementation principle of the driving apparatus for a touch display panel according to the embodiment is similar to that of the driving method for a touch display panel according to the above embodiment, and is not described herein again.
EXAMPLE III
Based on the same inventive concept, an embodiment of the present invention provides a touch display panel, where the touch display panel includes a driving apparatus of the touch display panel provided in the above embodiment, and an implementation principle of the driving apparatus is similar to that of the driving method of the touch display panel provided in the above embodiment, and is not described herein again.
Optionally, the touch display panel provided by the embodiment of the invention comprises an in-cell touch display panel.
It can be understood that the embedded touch display panel can embed the touch panel into the display panel, so that the thickness of the touch display panel can be reduced while the display and touch functions are realized, and the light and thin structure of the product is facilitated.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A driving method of a touch display panel, the touch display panel comprising: the touch control device comprises a plurality of grid lines, a plurality of touch control drive wires and a source electrode drive chip; the grid lines are divided into a plurality of grid line groups; characterized in that the driving method comprises: driving a display frame of the touch display panel to display frame by frame; wherein, for each frame display picture, the driving method comprises the following steps:
A display stage: scanning the plurality of grid lines line by line along a direction departing from the source electrode driving chip; the scanning time of each grid line group is sequentially increased along the direction departing from the source electrode driving chip;
And (3) a touch control stage: and writing touch driving signals into the touch driving lines line by line.
2. The driving method of the touch display panel according to claim 1, wherein each of the gate line groups includes one of the gate lines;
A display stage: scanning the plurality of grid lines line by line along a direction departing from the source electrode driving chip; and the scanning time of each grid line is sequentially increased along the direction departing from the source electrode driving chip.
3. the driving method of the touch display panel according to claim 2, wherein the incremental scanning time between any two adjacent gate lines is equal.
4. The driving method of the touch display panel according to claim 1, wherein each of the gate line groups includes a plurality of gate lines;
A display stage: scanning the plurality of grid lines line by line along a direction departing from the source electrode driving chip; and the scanning time of each grid line group is sequentially increased along the direction departing from the source electrode driving chip.
5. The driving method of the touch display panel according to claim 4, wherein the number of the gate lines in each of the gate line groups is equal.
6. The driving method of the touch display panel according to claim 4, wherein the scanning time of each gate line in the same gate line group is equal, and the scanning time of the gate lines in different gate line groups is not equal.
7. The driving method of the touch display panel according to claim 4, wherein the incremental scanning time of any two of the gate line groups is equal.
8. A driving apparatus of a touch display panel, the touch display panel comprising: the touch control device comprises a plurality of grid lines, a plurality of touch control drive wires and a source electrode drive chip; the grid lines are divided into a plurality of grid line groups; characterized in that the drive means comprise: the driving device is used for driving the display picture of the touch display panel to display frame by frame; wherein, for each frame display picture, the driving device comprises:
The display driving unit is used for scanning the grid lines line by line along the direction departing from the source electrode driving chip; the scanning time of each grid line group is sequentially increased along the direction departing from the source electrode driving chip;
and the touch driving unit is used for writing touch driving signals into the touch driving lines line by line.
9. a touch display panel comprising the driving apparatus of the touch display panel according to claim 8.
10. The touch display panel of claim 9, wherein the touch display panel comprises an in-cell touch display panel.
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| CN201910837518.3A CN110554806A (en) | 2019-09-05 | 2019-09-05 | driving method and device of touch display panel and touch display panel |
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| CN201910837518.3A CN110554806A (en) | 2019-09-05 | 2019-09-05 | driving method and device of touch display panel and touch display panel |
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| US20190073069A1 (en) * | 2017-09-05 | 2019-03-07 | Au Optronics Corporation | Non in-cell touch display apparatus and touch detection method thereof |
| CN110070818A (en) * | 2019-04-10 | 2019-07-30 | 深圳市华星光电技术有限公司 | Grid drive method for display panel |
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| CN103745694A (en) * | 2013-11-27 | 2014-04-23 | 深圳市华星光电技术有限公司 | Driving method and driving circuit of display panel |
| CN106898325A (en) * | 2017-04-27 | 2017-06-27 | 南京中电熊猫平板显示科技有限公司 | Liquid crystal display faceplate device and its driving method |
| US20190073069A1 (en) * | 2017-09-05 | 2019-03-07 | Au Optronics Corporation | Non in-cell touch display apparatus and touch detection method thereof |
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