CN113900534B - Driving system and method of touch display panel - Google Patents
Driving system and method of touch display panel Download PDFInfo
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- CN113900534B CN113900534B CN202010641648.2A CN202010641648A CN113900534B CN 113900534 B CN113900534 B CN 113900534B CN 202010641648 A CN202010641648 A CN 202010641648A CN 113900534 B CN113900534 B CN 113900534B
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- 238000000034 method Methods 0.000 title claims description 25
- 230000008878 coupling Effects 0.000 claims abstract description 26
- 238000010168 coupling process Methods 0.000 claims abstract description 26
- 238000005859 coupling reaction Methods 0.000 claims abstract description 26
- 239000011159 matrix material Substances 0.000 claims abstract description 6
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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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
- G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
Abstract
A driving system of a touch display panel comprises a panel and a grid driving circuit. The panel is provided with an active area and a plurality of touch electrodes arranged on the active area in a matrix form. The gate driving circuit is connected with a plurality of gate lines which are sequentially arranged on the active area to provide gate driving voltage for driving, wherein at least one gate line which is not covered by the touch electrode is arranged in the gate lines which are positioned in the range formed by the upper and lower adjacent touch electrodes, and the gate line which is not covered by the touch electrode, at least one gate line in front of the gate line and at least one gate line behind the gate line are selected as the gate lines which influence coupling. When the grid lines with the influence coupling are driven, the grid driving circuit enables the interval between the opening time of each at least one grid line in the grid lines with the influence coupling and the opening time of the grid lines before the grid lines to be larger than a preset interval, and the interval between the opening time of each other grid lines with the influence coupling and the opening time of the grid lines before the grid lines is equal to the preset interval.
Description
Technical Field
The present invention relates to a driving system and method for a touch display panel, and more particularly, to a driving system and method for a touch display panel capable of avoiding cross-talk caused by gaps between touch point electrode layouts.
Background
In the conventional In-cell touch display panel, as shown In fig. 1, the common electrode layer (VCOM) which is originally covered by the whole layer is cut into a plurality of touch electrodes, and as a result of the above-mentioned cutting of the common electrode layer 12 into a plurality of touch electrodes 11, the common electrode layer 12 which is originally covered by the whole layer must be cut to form an area which is not covered by the common electrode layer 12, and this area may cause a difference In load of pixels of the touch display panel, and when the Gate Lines (Gate Lines) are driven, the Gate Lines (for example, G [ i ]) which are not covered by the common electrode layer 12, and the Gate Lines (for example, G [ i-1], G [ i+1 ]) which are still covered by the common electrode layer 12 may generate different coupling amounts, which may cause a difference In coupling amount between the divided common electrode layers 12, thereby forming a cross-stripe (Mura) phenomenon. In particular, as shown in fig. 2, for the GOA (Gate driver On Array) touch display panel, the gate driving modes are all fixed-pitch scanning, so that the front and rear gate lines are continuously turned on and the turn-on time is different by a preset pitch (1H), and the coupling amount to the common electrode layer of the panel is larger in the adjacent gate lines due to the longer output width (8H) of the gate driving voltage of the gate lines, so that when the area not covered by the common electrode layer is encountered, the difference between the display and other areas covered by the common electrode layer is more likely to be caused.
Therefore, the conventional touch display panel cannot avoid the cross-stripe phenomenon caused by cutting the common electrode layer into a plurality of touch electrodes, and thus needs to be improved.
Disclosure of Invention
The invention mainly aims to provide a driving system and a driving method of a touch display panel, which can avoid transverse stripes caused by a layout gap of a touch electrode by a driving mode of non-fixed-interval scanning of a grid driving circuit.
According to an aspect of the present invention, a driving system of a touch display panel is provided, which includes: a panel having an active region and a plurality of touch electrodes, wherein the plurality of touch electrodes are arranged on the active region in a matrix form; and a gate driving circuit connected to the gate lines sequentially disposed on the active region to provide a gate driving voltage for driving, wherein at least one of the gate lines in a range formed by the upper and lower adjacent touch electrodes is uncovered by the touch electrode, and the uncovered gate line, the at least one gate line in front of the uncovered gate line, and the at least one gate line behind the uncovered gate line are selected as the coupling-influencing gate line, wherein when the coupling-influencing gate line is driven, the gate driving circuit makes a distance between a time for opening each of the coupling-influencing gate lines and a time for opening a previous gate line of the coupling-influencing gate line larger than a preset distance, and a distance between a time for opening each remaining coupling-influencing gate line and a time for opening a previous gate line of the coupling-influencing gate line is equal to the preset distance.
According to another aspect of the present invention, a method for driving a touch display panel having an active region, a plurality of touch electrodes arranged in a matrix form on the active region, and a plurality of gate lines sequentially arranged on the active region is provided, wherein at least one of the gate lines located in a range formed by the touch electrodes adjacent to each other is not covered by the touch electrodes, the method includes: selecting the gate line uncovered by the touch electrode, and at least one gate line in front of the gate line and at least one gate line behind the gate line as the gate line influencing coupling; and sequentially driving the gate lines in a range formed by the touch electrodes adjacent to each other, wherein when the coupling-influencing gate lines are driven, a distance between the opening time of each at least one gate line and the opening time of the previous gate line in the coupling-influencing gate lines is larger than a preset distance, and a distance between the opening time of each other coupling-influencing gate lines and the opening time of the previous gate lines is equal to the preset distance.
The foregoing summary and the following detailed description are exemplary in nature and are intended to further illustrate the invention as claimed, while other objects and advantages of the invention are set forth in the following description and drawings.
Drawings
Fig. 1 schematically shows a structure of a touch display panel in which a common electrode layer, which is originally an entirely covered layer, is cut into a plurality of touch electrodes.
Fig. 2 is a timing chart of gate driving of the GOA touch display panel.
Fig. 3 is a schematic diagram of a driving system of a touch display panel according to the present invention.
Fig. 4 schematically shows a gate line not completely covered by a common electrode layer on a panel, and a plurality of gate lines in front of and a plurality of gate lines below the gate line.
Fig. 5 is a driving timing chart of the driving method of the touch display panel of the present invention.
Symbol description:
panel 10
Common electrode layer 12
Touch electrode 11,14,141,142
Gate drive circuit 20
Left gate driving circuit 20L
Right gate driving circuit 20R
Source electrode driving circuit 30
Active region 18
Gate lines G1-G N
Gate lines G [ i-x2] to G [ i+y2]
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific examples described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Fig. 3 schematically shows a driving system of a touch display panel of the present invention, which includes a panel 10, a gate driving circuit 20 and a source driving circuit 30, wherein the panel 10 is, for example, a touch display panel, the panel 10 has an active region 18 for displaying or touching, the common electrode layer 12 of the panel 10 is cut into a plurality of touch electrodes 14, the plurality of touch electrodes 14 are arranged on the active region 18 of the panel 10 in a matrix form, each touch electrode 14 is, for example, a rectangle, the gate driving circuit 20 may be an integrated circuit chip connected to the panel 10 or a circuit directly fabricated on the panel 10, the gate driving circuit 20 is connected to a plurality of gate lines G1 to G N for providing gate driving voltages, the gate lines G1 to G N are sequentially disposed on the active region 18 of the panel 10 from top to bottom, the gate driving circuit 20 sequentially drives a plurality of gate lines G1 to G N, and the source driving circuit 30 provides data voltages for the panel 10 to display data.
In the embodiment of FIG. 3, the gate driving circuit 20 is divided into a left gate driving circuit 20L and a right gate driving circuit 20R respectively disposed at the left side and the right side of the active region 18 of the panel 10, the left gate driving circuit 20L provides gate driving voltages for a plurality of gate lines G1, G3, G5G … G N-5, G N-3, G N-1) with odd numbers, and the right gate driving circuit 20R provides gate driving voltages for a plurality of gate lines G2, G4, G6G … G N-4, G N-2, G N with even numbers. However, in other embodiments, the gate driving circuit 20 of the present invention may be a single circuit disposed on one side of the panel 10, and may be driven by a plurality of gate lines G1, G2, G3, … G N-2, G N-1, and G N for providing gate driving voltages.
As shown in fig. 3, since the common electrode layer 12 of the panel 10 is cut into the plurality of touch electrodes 14 to form an area not covered by the common electrode layer 12, a portion of the plurality of gate lines G [1] to gn of the gate driving circuit 20 is located in the area not covered by the common electrode layer 12 (i.e., not covered by the touch electrodes 14 adjacent to each other up and down) and is not covered by the common electrode layer 12. That is, part of the gate lines of the active region 18 of the panel 10 are covered by the touch electrode 14, and part of the gate lines are not covered by the touch electrode 14. And at least one gate line G i not covered by the common electrode layer 12 (touch electrode 14) among the gate lines located in the range formed by the touch electrodes 141,142 adjacent to each other in the upper and lower directions according to the display resolution and touch resolution of the panel 10.
In the driving method of the touch display panel of the present invention, the driving method of the gate driving circuit 20 does not adopt a fixed pitch scan to enable the front and rear gate lines to be turned on continuously and the turned on time to be different by a fixed pitch (1H), but selects a gate line G [ i ] uncovered by the upper and lower adjacent touch electrodes 141,142, and at least one gate line (G [ i-1] …) in front of the gate line G [ i+1] …) as the gate line for influencing the coupling, so that the turned on time of each gate line for influencing the coupling is different from the turned on time of the previous gate line by a pitch greater than a preset pitch, thereby reducing the coupling effect of the gate line to the common electrode layer 12, and the turned on time of each remaining gate line for influencing the coupling is different from the turned on time of the previous gate line by a pitch equal to the preset pitch. The default pitch is a pitch (1H) that enables the front and rear gate lines to be continuously turned on and the turned-on time is different in the existing gate driving mode of fixed pitch scanning.
Fig. 4 schematically shows a gate line G [ i ] not covered by the common electrode layer 12 (the touch electrode 14) on the panel 10, and a plurality of gate lines G [ i-1], G [ i-2], G [ i-3] … G [ i-x2] … in front of the same, and a plurality of gate lines G [ i+1], G [ i+2], G [ i+3] … G [ i+y2] … in back of the same, wherein i is an index value between 1 and N, x2, y2 are positive integers greater than 0, the gate line G [ i-x2] is a gate line covered by the touch electrode 141 directly above the gate line G [ i ], and the gate line G [ i+y2] is a gate line covered by the touch electrode 142 directly below the gate line G [ i ].
In the method for driving a touch display panel according to the present invention, the gate line G [ i-x2] … G [ i-x1] … G [ i-3], G [ i-2], G [ i-1], G [ i+1], G [ i+2], G [ i+3] … G [ i+y1] … G [ i+y2] is selected based on the gate line G [ i ] not covered by the common electrode layer 12 (the touch electrode 14), and at least one gate line G [ i-1] to G [ i-x1] located in front of the gate line G [ i ] and at least one gate line G [ i+1] to G [ i+y1] located behind the gate line G [ i ] are positive integers larger than 0, wherein x1, y1 is smaller than x2 and y1 is smaller than y2.
The driving method of the touch display panel of the present invention sequentially drives a plurality of gate lines G [ i-x2] to G [ i+y2], wherein when the plurality of gate lines G [ i-x2] to G [ i-x1-1] are driven, the gate driving circuit 20 makes the interval between the time of opening each gate line G [ i-x2] to G [ i-x1-1] and the time of opening the previous gate line equal to the preset interval; when driving the plurality of gate lines G [ i-x1] to G [ i+y1], the gate driving circuit 20 makes a gap between a time when each of the (x1+y1) gate lines G [ i-x1] to G [ i+y1] is turned on and a time when a previous gate line is turned on be greater than the preset gap, for example, twice the preset gap, and a gap between a time when each of the (x1+y1) gate lines G [ i-x1] to G [ i+y1] is turned on and a time when a previous gate line is turned on still be equal to the preset gap; when driving the plurality of gate lines G [ i+y1+1] to G [ i+y2], the gate driving circuit 20 makes a difference between a time when each gate line G [ i+y1+1] to G [ i+y2] is turned on and a time when a previous gate line is turned on equal to the preset interval.
Specifically, in an embodiment of the driving method of the touch display panel of the present invention, x1=1, y1=1, that is, when three gate lines G [ i-1], G [ i ], G [ i+1] are driven, a gap between a time when each of the three gate lines G [ i-1], G [ i+1] is driven (at least one gate line, for example, the gate line G [ i-1], the gate line G [ i ], the gate line G [ i+1], the gate lines G [ i-1] and G [ i ], the gate lines G [ i ] and G [ i+1], or the gate lines G [ i-1] to G [ i+1] is greater than the preset gap, for example, twice the preset gap, and a time when each of the remaining gate lines of the three gate lines G [ i-1], G [ i+1] is driven is equal to the preset gap between the time when the gate lines are driven and the preceding gate line. Herein, "each of the at least one gate line" may be understood as meaning "each of the at least one gate line".
In another embodiment of the driving method of the touch display panel of the present invention, when driving the plurality of gate lines G [ i-x2] to G [ i-x1-1], the gate driving circuit 20 makes the interval between the turn-on time of each gate line G [ i-x2] to G [ i-x1-1] and the turn-on time of the previous gate line equal to the preset interval; when driving the plurality of gate lines G [ i-x1] to G [ i+y1], the gate driving circuit 20 makes a difference between a time when each of the (x1+y1+1) gate lines G [ i-x1] to G [ i+y1] is turned on and a time when a previous gate line is turned on be greater than the preset interval, for example, be twice the preset interval; when driving the plurality of gate lines G [ i+y1+1] to G [ i+y2], the gate driving circuit 20 makes a difference between a time when each gate line G [ i+y1+1] to G [ i+y2] is turned on and a time when a previous gate line is turned on equal to the preset interval. Fig. 5 shows a driving timing chart of the driving method according to the embodiment, wherein x1 is equal to 1, y1 is equal to 2, x2 is equal to 5 or an integer greater than 5, and y2 is equal to 5 or an integer greater than 5.
In addition, in the foregoing embodiments, since the gate driving circuit 20 is driven by non-fixed-pitch scanning, the timing of the source driving circuit 30 providing the data voltage is also changed in compliance to correctly display the data on the active region 18 of the panel 10, which will be understood by those skilled in the art in view of the disclosure of the present invention, and will not be described in detail.
In summary, in the driving method of non-fixed pitch scanning of the gate driving circuit, the time pitch for opening the gate lines at the interface of the touch electrode can be lengthened, so that the time for recovering the common electrode layer after being coupled is enough, the influence of the gate lines on the coupling of the common electrode layer can be effectively reduced, the common electrode layer has better stability, and the cross grain phenomenon caused by uneven load of the common electrode layer is further alleviated.
The above embodiments are merely illustrative, and the scope of the invention claimed should be determined by the claims and not limited to the above embodiments.
Claims (16)
1. A driving system of a touch display panel, comprising:
a panel having an active region and a plurality of touch electrodes, wherein the plurality of touch electrodes are arranged on the active region in a matrix form;
a gate driving circuit connected with the gate lines sequentially arranged on the active region to provide gate driving voltage for driving, wherein at least one gate line uncovered by the touch electrode is arranged in the gate lines in the range formed by the upper and lower adjacent touch electrodes, and the gate line uncovered by the touch electrode, at least one gate line in front of the gate line and at least one gate line behind the gate line are selected as the gate line for influencing coupling,
when the gate lines with the influence coupling are driven, the gate driving circuit enables the interval between the opening time of each gate line with the influence coupling and the opening time of the gate line before the gate line with the influence coupling to be larger than a preset interval, and the interval between the opening time of each gate line with the influence coupling and the opening time of the gate line before the gate line with the influence coupling except the gate line with the influence coupling is equal to the preset interval.
2. The system of claim 1, wherein the gate driving circuit causes each of the at least one gate lines of the coupling-affected gate lines to be turned on at a pitch different from a time at which a previous gate line is turned on by twice the preset pitch.
3. The system of claim 1, wherein the gate driving circuit makes a difference between a turn-on time of each gate line and a turn-on time of a previous gate line equal to the predetermined distance when driving the gate lines except the coupling-affected gate line within a range formed by the upper and lower adjacent touch electrodes.
4. The touch display panel driving system according to claim 1, wherein the gate line not covered by the touch electrode, and a preceding gate line and a following gate line thereof are selected to affect the coupled gate lines.
5. The system of claim 4, wherein the gate driving circuit causes a difference between a time when each of the at least one gate lines of the three impact-coupled gate lines is turned on and a time when a previous gate line is turned on to be greater than the predetermined distance.
6. The system of claim 5, wherein the gate driving circuit causes each of the at least one gate lines of the three impact-coupled gate lines to be turned on at a distance twice the predetermined distance from a time when a previous gate line is turned on.
7. The system of claim 1, wherein the gate driving circuit causes a difference between a time when each of the gate lines of the effect-coupled gate lines is turned on and a time when a previous gate line is turned on to be greater than the predetermined distance when the effect-coupled gate lines are driven; when driving the gate lines except the gate lines which affect the coupling and are positioned in the range formed by the upper and lower adjacent touch electrodes, the gate driving circuit enables the interval between the opening time of each gate line and the opening time of the previous gate line to be equal to the preset interval.
8. The system of claim 7, wherein the gate driving circuit causes a time period for which each of the gate lines of the effect-coupled gate lines is turned on to be different from a time period for which a previous gate line is turned on by a distance twice the predetermined distance when the effect-coupled gate lines are driven.
9. A method for driving a touch display panel having an active region, a plurality of touch electrodes arranged in a matrix form on the active region, and a plurality of gate lines sequentially arranged on the active region, wherein at least one of the gate lines located in a range formed by the touch electrodes adjacent to each other is uncovered by the touch electrodes, the method comprising:
selecting the gate line uncovered by the touch electrode, and at least one gate line in front of the gate line and at least one gate line behind the gate line as the gate line influencing coupling; and
and sequentially driving the gate lines in a range formed by the touch electrodes adjacent to each other, wherein when the gate lines influencing the coupling are driven, the interval between the opening time of each gate line of the gate lines influencing the coupling and the opening time of the gate line preceding the gate line is larger than a preset interval, and the interval between the opening time of each gate line influencing the coupling and the opening time of the gate line preceding the gate line except the gate line influencing the coupling is equal to the preset interval.
10. The method of claim 9, wherein each of the at least one gate line of the effect-coupled gate lines is turned on at a pitch different from a time at which a previous gate line is turned on by twice the preset pitch when the effect-coupled gate line is driven.
11. The method of claim 9, wherein a distance between a turn-on time of each gate line and a turn-on time of a previous gate line is equal to the predetermined distance when driving the gate lines in a range formed by the upper and lower adjacent touch electrodes except the coupling-affected gate line.
12. The method of claim 9, wherein the gate line not covered by the touch electrode and one gate line in front of and one gate line behind it are selected to affect the coupled gate lines.
13. The method of claim 12 wherein, when driving the coupling-influencing gate lines, a time at which each of the at least one gate lines of the three coupling-influencing gate lines is turned on is separated from a time at which its previous gate line is turned on by a distance greater than the predetermined distance.
14. The method of claim 13, wherein each of the at least one gate lines of the three effect-coupled gate lines is turned on at a pitch different from a time at which a previous gate line is turned on by twice the preset pitch when the effect-coupled gate line is driven.
15. The method of claim 9, wherein, when driving the coupling-affected gate lines, a gap between a time when each of the coupling-affected gate lines is turned on and a time when a previous gate line is turned on is greater than the preset gap; when driving the grid lines except the grid lines which affect the coupling and are positioned in the range formed by the upper and lower adjacent touch electrodes, the interval between the opening time of each grid line and the opening time of the previous grid line is equal to the preset interval.
16. The method of claim 15 wherein, when driving the operatively coupled gate lines, a time period between when each gate line of the operatively coupled gate lines is turned on and a time period when a preceding gate line is turned on is twice the predetermined time period.
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