CN114327154B - Driving framework for improving touch sensitivity of display panel and driving method thereof - Google Patents
Driving framework for improving touch sensitivity of display panel and driving method thereof Download PDFInfo
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Abstract
The invention discloses a driving framework for improving touch sensitivity of a display panel and a driving method thereof, wherein every four TP units form a TP unit group with two rows and two columns, each TP unit comprises a plurality of TP sensors which are arranged in an array, all TP sensors of two TP units with different columns and rows in one TP unit group are commonly connected to one driving signal line, and all TP sensors of other two TP units with different columns and rows in one TP unit group are commonly connected to the other driving signal line; all TP sensors of the same driving signal line are numbered according to the position sequence and are respectively connected with one path of switching signal Sx, and TP sensors which are connected to different driving signal lines and have the same position sequence number are connected with the same path of switching signal Sx. When a TP sensor at a non-center position in the TP unit is detected, the opening times of the two driving signal lines are overlapped. The invention effectively avoids the influence of parasitic capacitance on the touch sensitivity of the panel.
Description
Technical Field
The present invention relates to the field of panel driving technologies, and in particular, to a driving architecture for improving touch sensitivity of a display panel and a driving method thereof.
Background
As shown in fig. 1, which is a conventional TP Demux driving architecture, fig. 2 is a driving timing of the pair. Under the driving architecture, when Sx11 is at a high level, sx12 and Sx22 are at a low level, parasitic capacitances (Cp 1, cp 2) exist in Sx11, sx12 and Sx22, and when Sx12 is at a high level, sx11 and Sx21 are at a low level, and similarly, parasitic capacitances exist between Sx12, sx11 and Sx21, which affect the touch sensitivity of the panel.
Disclosure of Invention
The invention aims to provide a driving framework for improving touch sensitivity of a display panel and a driving method thereof.
The technical scheme adopted by the invention is as follows:
A driving framework for improving touch sensitivity of a display panel comprises more than four TP units and two driving signal lines output by a driving IC, wherein each four TP units form a TP unit group with two rows and two columns, each TP unit comprises a plurality of TP sensors, and the TP sensors of the TP units are arranged in an array;
All TP sensors of two TP units of different columns and different rows in one TP unit group are commonly connected to one driving signal line, and all TP sensors of other two TP units of different columns and different rows in one TP unit group are commonly connected to the other driving signal line;
All TP sensors connected to the same driving signal line in one TP unit group are numbered according to the position sequence and are respectively connected with one switch signal Sx, and TP sensors connected to different driving signal lines in one TP unit group and having the same position sequence number are connected with the same switch signal Sx.
Further, the TP unit comprises 9 TP sensors, and the 9 TP sensors are arranged in an array of three rows and three columns.
Further, when the TP sensor at the center of the TP unit is detected, the high and low levels output on the two driving signal lines are opposite, so as to complete touch detection.
Further, when the TP sensor at a non-central position in the TP unit is detected, the on-times of the two driving signal lines overlap (overlap), that is, before one driving signal line goes from a high level to a low level, the other driving signal line goes from a low level to a high level in advance, and the two driving signal lines output a high level in a part of the time period; one of the driving signal lines is changed from a low level to a high level in advance before the other driving signal line is changed from the high level to the low level, and the two driving signal line parts output the high level simultaneously.
Further, when the TP sensor at the non-center position in the TP unit is detected, the TP sensor is driven according to the following four stages of time sequence circulation;
a first stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a low level;
a second stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level;
A third stage in which one of the drive signal lines outputs a low level and the other drive signal line outputs a high level;
and a fourth stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level.
Further, the high-level voltages output from both the drive signal lines are the same.
A driving method of a driving framework for improving touch sensitivity of a display panel comprises the following steps:
Step 1, judging whether a TP sensor detected currently is positioned at the middle position of a TP unit; if yes, executing the step 2; otherwise, executing the step 3;
Step 2, driving the two driving signal lines respectively according to the conventional time sequence, namely, the high and low levels output by the two driving signal lines are opposite, and executing step 1 after touch detection is completed;
Step 3, when the TP sensor at the non-central position in the TP unit is detected, the method is driven according to the following four stages of time sequence circulation;
a first stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a low level;
a second stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level;
A third stage in which one of the drive signal lines outputs a low level and the other drive signal line outputs a high level;
and a fourth stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level.
Further, the switch information Sx detected in four stages is respectively obtained, and the actual touch point is determined based on the difference of the detected switch information Sx;
When the first stage and the second stage detect that the switch signal Sx at the same position is at a high level, judging that the TP sensor connected to one of the drive signal lines and connected with the detected switch signal Sx is a current actual touch point;
when the third stage and the fourth stage both detect that the switch signal Sx at the same position is at the high level, it is determined that the TP sensor connected to the other driving signal line and connected to the detected switch signal Sx is the current actual touch point.
By adopting the technical scheme, all TP sensors of two TP units of different columns and different rows in one TP unit group are commonly connected to one driving signal line, and all TP sensors of other two TP units of different columns and different rows in one TP unit group are commonly connected to the other driving signal line. When the TP sensor at the central position in the TP unit is detected, the high and low levels output on the two driving signal lines are opposite to each other, so that touch detection is completed. When a TP sensor at a non-central position in the TP unit is detected, the opening time of two driving signal lines is overlapped (overlap), namely, one driving signal line is changed from a low level to a high level in advance before the other driving signal line is changed from the high level to the low level, and the two driving signal lines output the high level in a part of time period; one of the driving signal lines is changed from a low level to a high level in advance before the other driving signal line is changed from the high level to the low level, and the two driving signal line parts output the high level simultaneously. The invention effectively avoids the influence of parasitic capacitance on the touch sensitivity of the panel.
Drawings
The invention is described in further detail below with reference to the drawings and detailed description;
FIG. 1 is a schematic diagram of a conventional TP Demux driving architecture;
FIG. 2 is a schematic diagram of a conventional TP Demux driving timing sequence;
FIG. 3 is a schematic diagram of a driving architecture for improving touch sensitivity of a display panel according to the present invention;
FIG. 4 is a schematic diagram showing a driving structure for improving touch sensitivity of a display panel according to the present invention;
FIG. 5 is a schematic diagram showing driving timing when TP sensor at non-center position is detected in a driving structure for improving touch sensitivity of a display panel according to the present invention;
fig. 6 is a schematic diagram of the state when the on (high level) time overlaps on two driving signal lines of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.
As shown in one of fig. 3 to 6, the present invention discloses a driving architecture for improving touch sensitivity of a display panel, which includes more than four TP units and two driving signal lines output by a driving IC, wherein each four TP units form a TP unit group with two rows and two columns, each TP unit includes a plurality of TP sensors, and the TP sensors of the TP units are arranged in an array;
All TP sensors of two TP units of different columns and different rows in one TP unit group are commonly connected to one driving signal line, and all TP sensors of other two TP units of different columns and different rows in one TP unit group are commonly connected to the other driving signal line;
All TP sensors connected to the same driving signal line in one TP unit group are numbered according to the position sequence and are respectively connected with one switch signal Sx, and TP sensors connected to different driving signal lines in one TP unit group and having the same position sequence number are connected with the same switch signal Sx.
Further, the TP unit comprises 9 TP sensors, and the 9 TP sensors are arranged in an array of three rows and three columns.
Further, when the TP sensor at the center of the TP unit is detected, the high and low levels output on the two driving signal lines are opposite, so as to complete touch detection.
Further, when the TP sensor at a non-central position in the TP unit is detected, the on-times of the two driving signal lines overlap (overlap), that is, before one driving signal line goes from a high level to a low level, the other driving signal line goes from a low level to a high level in advance, and the two driving signal lines output a high level in a part of the time period; one of the driving signal lines is changed from a low level to a high level in advance before the other driving signal line is changed from the high level to the low level, and the two driving signal line parts output the high level simultaneously.
Further, when the TP sensor at the non-center position in the TP unit is detected, the TP sensor is driven according to the following four stages of time sequence circulation;
a first stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a low level;
a second stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level;
A third stage in which one of the drive signal lines outputs a low level and the other drive signal line outputs a high level;
and a fourth stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level.
Further, the high-level voltages output from both the drive signal lines are the same.
A driving method of a driving framework for improving touch sensitivity of a display panel comprises the following steps:
Step 1, judging whether a TP sensor detected currently is positioned at the middle position of a TP unit; if yes, executing the step 2; otherwise, executing the step 3;
Step 2, driving the two driving signal lines respectively according to the conventional time sequence, namely, the high and low levels output by the two driving signal lines are opposite, and executing step 1 after touch detection is completed;
Step 3, when the TP sensor at the non-central position in the TP unit is detected, the method is driven according to the following four stages of time sequence circulation;
a first stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a low level;
a second stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level;
A third stage in which one of the drive signal lines outputs a low level and the other drive signal line outputs a high level;
and a fourth stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level.
Further, the switch information Sx detected in four stages is respectively obtained, and the actual touch point is determined based on the difference of the detected switch information Sx;
When the first stage and the second stage detect that the switch signal Sx at the same position is at a high level, judging that the TP sensor connected to one of the drive signal lines and connected with the detected switch signal Sx is a current actual touch point;
when the third stage and the fourth stage both detect that the switch signal Sx at the same position is at the high level, it is determined that the TP sensor connected to the other driving signal line and connected to the detected switch signal Sx is the current actual touch point.
The specific working principle of the invention will now be described in detail:
As shown in fig. 3, as an embodiment, 9 TP sensors are grouped together, and the 9 TP sensors supply the same driving signal at the same time.
As shown in fig. 3, each small box represents a TP sensor, and the numbers (X, Y) in the box represent the Sx (X) and TP Demux switch (Y) to which they are connected, respectively, taking (15, 2) as an example: 15 represents that the Sx signal connected with the signal is Sx15;2 indicates that the TP Demux switch to which it is connected is 2, i.e., TP Demux2.
When the system detects a sensor such as (5, 1), (5, 2), (14, 1), (14, 2) at the center of the TP sensor of each TP unit. As shown in fig. 4, taking (5, 1) as an example, at this time, (5, 1) and its peripheral sensor are at the same high level as the signal given thereto, at this time, (5, 1) and its peripheral sensor have no parasitic capacitance, and the touch sensitivity can be improved.
When the system detects TP sensors at the edge of each TP unit, i.e., TP sensors other than the center of each TP unit, the driving timing of the TP sensors at (6, 1) is illustrated in fig. 5.
When the system detects the (6, 1) position, TP Demux1 is turned on first, as shown in stage ① in FIG. 5, TP Demux2 is turned off, where Sx 1-Sx 9 controlled by TP Demux1 are the same high level driving signals, and Sx 1-Sx 9 controlled by TP Demux2 are turned off at low level. At this time, the TP sensor at the (6, 1) position and the TP sensor at the (1, 2), (4, 2), (7, 2) position generate parasitic capacitance, which affects the touch sensitivity. The turn-on time of TP Demux1 and TP Demux2 is now overlapped (overlap), before the high level of TP Demux1 ends, TP Demux2 is turned on in advance, and in the overlapped part of the high level of the driving signal, TP sensors around (6, 1) and the Sx signal of the driving signal are at the same high level, as shown in fig. 6, at this time, no interference of parasitic capacitance exists, and the touch sensitivity is improved.
However, for the Sx6 signal, the (6, 1) and (6, 2) signals are driven simultaneously at the overlapping position of the high level signals, which is easy to produce and is easy to touch by mistake. The system frame measurement mode is adjusted as follows: when the system is to detect the (6, 1) position, TP Demux1 is turned on first, stage ① in FIG. 5, when the system detects the (6, 1) position; proceeding to stage ② in FIG. 5, TP Demux1/2 is simultaneously on and the system detects both (6, 1) and (6, 2), and when the system detects the same position in stage ①②, the system can determine that the actually required detected position is (6, 1). Similarly, stage ③④ of FIG. 5 is used to detect location (6, 2). Stage ①②③④ in FIG. 5 is a loop, i.e., stage ①② detects TP sensor controlled by TP Demux1 in the same root Sx, and stage ③④ detects TP sensor controlled by TP Demux2, thus detecting TP sensor located at different positions throughout and generating no false touch.
By adopting the technical scheme, all TP sensors of two TP units of different columns and different rows in one TP unit group are commonly connected to one driving signal line, and all TP sensors of other two TP units of different columns and different rows in one TP unit group are commonly connected to the other driving signal line. When the TP sensor at the central position in the TP unit is detected, the high and low levels output on the two driving signal lines are opposite to each other, so that touch detection is completed. When a TP sensor at a non-central position in the TP unit is detected, the opening time of two driving signal lines is overlapped (overlap), namely, one driving signal line is changed from a low level to a high level in advance before the other driving signal line is changed from the high level to the low level, and the two driving signal lines output the high level in a part of time period; one of the driving signal lines is changed from a low level to a high level in advance before the other driving signal line is changed from the high level to the low level, and the two driving signal line parts output the high level simultaneously. The invention effectively avoids the influence of parasitic capacitance on the touch sensitivity of the panel.
It will be apparent that the described embodiments are some, but not all, embodiments of the application. Embodiments of the application and features of the embodiments may be combined with each other without conflict. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Claims (6)
1. The utility model provides an improve drive framework of display panel touch sensitivity which characterized in that: the driving circuit comprises more than four TP units and two driving signal lines output by a driving IC, wherein each four TP units form a TP unit group with two rows and two columns, each TP unit comprises a plurality of TP sensors, and the TP sensors of the TP units are arranged in an array;
All TP sensors of two TP units of different columns and different rows in one TP unit group are commonly connected to one driving signal line, and all TP sensors of other two TP units of different columns and different rows in one TP unit group are commonly connected to the other driving signal line;
All TP sensors connected to the same driving signal line in one TP unit group are numbered according to the position sequence and are respectively connected with one path of switching signal Sx, and TP sensors connected to different driving signal lines in one TP unit group and having the same position sequence number are connected with the same path of switching signal Sx;
when the TP sensor at the central position in the TP unit is detected, the high and low levels output on the two driving signal lines are opposite to each other, so that touch detection is completed;
When a TP sensor at a non-central position in the TP unit is detected, the opening time of two driving signal lines is overlapped, namely, one driving signal line is changed from a low level to a high level in advance before the other driving signal line is changed from the high level to the low level, and the two driving signal lines output the high level in a part of time period; one of the driving signal lines is changed from a low level to a high level in advance before the other driving signal line is changed from the high level to the low level, and the two driving signal line parts output the high level simultaneously.
2. The driving architecture for improving touch sensitivity of a display panel according to claim 1, wherein: the TP unit comprises 9 TP sensors, and the 9 TP sensors are arranged in an array of three rows and three columns.
3. The driving architecture for improving touch sensitivity of a display panel according to claim 1, wherein: when the TP sensor at the non-central position in the TP unit is detected, the TP sensor is driven according to the following four stages of time sequence circulation;
a first stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a low level;
a second stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level;
A third stage in which one of the drive signal lines outputs a low level and the other drive signal line outputs a high level;
and a fourth stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level.
4. The driving architecture for improving touch sensitivity of a display panel according to claim 1, wherein: the high level voltages output by the two driving signal lines are the same.
5. A driving method of a driving architecture for improving touch sensitivity of a display panel, adopting the driving architecture for improving touch sensitivity of a display panel according to any one of claims 1 to 4, characterized in that: the driving method comprises the following steps:
Step 1, judging whether a TP sensor detected currently is positioned at the middle position of a TP unit; if yes, executing the step 2; otherwise, executing the step 3;
Step 2, driving the two driving signal lines respectively according to the conventional time sequence, namely, the high and low levels output by the two driving signal lines are opposite, and executing step 1 after touch detection is completed;
Step 3, when the TP sensor at the non-central position in the TP unit is detected, the method is driven according to the following four stages of time sequence circulation;
a first stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a low level;
a second stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level;
A third stage in which one of the drive signal lines outputs a low level and the other drive signal line outputs a high level;
and a fourth stage in which one of the drive signal lines outputs a high level and the other drive signal line outputs a high level.
6. The driving method of the driving architecture for improving touch sensitivity of a display panel according to claim 5, wherein: further comprising the steps of:
Respectively acquiring switch information Sx detected in four stages, and determining actual touch points based on different detected switch information Sx;
When the first stage and the second stage detect that the switch signal Sx at the same position is at a high level, judging that the TP sensor connected to one of the drive signal lines and connected with the detected switch signal Sx is a current actual touch point;
when the third stage and the fourth stage both detect that the switch signal Sx at the same position is at the high level, it is determined that the TP sensor connected to the other driving signal line and connected to the detected switch signal Sx is the current actual touch point.
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| KR20140148362A (en) * | 2014-12-11 | 2014-12-31 | 주식회사 지2터치 | Touch detecting means, method and touch screen panel using driving back, and display device embedding said the touch screen panel |
| CN105139813A (en) * | 2014-06-02 | 2015-12-09 | 三星显示有限公司 | Display apparatus and method of driving the same |
| CN113986052A (en) * | 2021-10-29 | 2022-01-28 | 福建华佳彩有限公司 | Driving method for improving touch sensitivity |
| CN217404845U (en) * | 2022-02-11 | 2022-09-09 | 福建华佳彩有限公司 | Drive architecture for improving touch sensitivity of display panel |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139813A (en) * | 2014-06-02 | 2015-12-09 | 三星显示有限公司 | Display apparatus and method of driving the same |
| KR20140148362A (en) * | 2014-12-11 | 2014-12-31 | 주식회사 지2터치 | Touch detecting means, method and touch screen panel using driving back, and display device embedding said the touch screen panel |
| CN113986052A (en) * | 2021-10-29 | 2022-01-28 | 福建华佳彩有限公司 | Driving method for improving touch sensitivity |
| CN217404845U (en) * | 2022-02-11 | 2022-09-09 | 福建华佳彩有限公司 | Drive architecture for improving touch sensitivity of display panel |
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