CN111625148A - Embedded display screen and driving method thereof - Google Patents
Embedded display screen and driving method thereof Download PDFInfo
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- CN111625148A CN111625148A CN202010477448.8A CN202010477448A CN111625148A CN 111625148 A CN111625148 A CN 111625148A CN 202010477448 A CN202010477448 A CN 202010477448A CN 111625148 A CN111625148 A CN 111625148A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses an embedded display screen, which comprises a display area and a non-display area, wherein the non-display area surrounds the display area; the display area is provided with a plurality of driving signal lines with equal length and a plurality of electrode blocks distributed in an array manner, and each electrode block is connected with at least one driving signal line; the non-display area is provided with a driving unit and a voltage compensation unit, the driving unit is connected to one end of each driving signal line, and the voltage compensation unit is connected to the other end of each driving signal line; the driving unit and the voltage compensation unit are used for outputting common electrode signals to the electrode blocks through the driving signal lines simultaneously during display so that the electrode blocks can be used as common electrodes. The embedded display screen has better display uniformity. The invention also discloses a driving method.
Description
Technical Field
The invention relates to a touch display technology, in particular to an embedded display screen and a driving method thereof.
Background
An in-cell (INCELL) display screen is a display screen with touch sensing electrodes or fingerprint sensing electrodes integrated therein, and generally, a common electrode layer inside the display screen is divided into blocks and multiplexed as the touch sensing electrodes or the fingerprint sensing electrodes, and a common electrode signal is output to the common electrode layer during display, and a touch sensing electrode signal or a fingerprint sensing electrode signal is output to the common electrode layer during touch control or fingerprint recognition.
As shown in fig. 1, the conventional in-cell display screen includes a display area and a non-display area, the non-display area surrounds the display area, the display area is provided with a plurality of driving signal lines 12 'and a plurality of electrode blocks 11' distributed in an array, the non-display area is provided with a driving unit 13 ', and each electrode block 11' is connected to the driving unit 13 'through at least one corresponding driving signal line 12'; when performing display, the driving unit 13 'outputs a common electrode signal to each electrode block 11' through each driving signal line 12 'so that the electrode block 11' functions as a common electrode, and when performing touch control or fingerprint recognition, the driving unit 13 'outputs a touch sensing electrode signal or a fingerprint sensing electrode signal to each electrode block 11' through each driving signal line 12 'so that the electrode block 11' functions as a touch sensing electrode or a fingerprint sensing electrode.
Since the electrode blocks 11 'are located at different positions, the lengths of the driving signal lines 12' for connecting the electrode blocks 11 'and the driving unit 13' are different, and thus, when a display is performed, the common electrode signal is attenuated on the driving signal lines 12 'to different degrees, resulting in a slight difference in the common voltage of the electrode blocks 11', and further causing display unevenness.
Disclosure of Invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides an embedded display panel and a driving method thereof, which have better display uniformity.
The technical problem to be solved by the invention is realized by the following technical scheme:
an in-cell display screen includes a display area and a non-display area surrounding the display area;
the display area is provided with a plurality of driving signal lines with equal length and a plurality of electrode blocks distributed in an array manner, and each electrode block is connected with at least one driving signal line;
the non-display area is provided with a driving unit and a voltage compensation unit, the driving unit is connected to one end of each driving signal line, and the voltage compensation unit is connected to the other end of each driving signal line; the driving unit and the voltage compensation unit are used for outputting common electrode signals to the electrode blocks through the driving signal lines simultaneously during display so that the electrode blocks can be used as common electrodes.
Further, the driving unit is also used for outputting sensing electrode signals to the electrode blocks through the driving signal lines during sensing so that the electrode blocks are used as sensing electrodes.
Furthermore, the common electrode signal output by the driving unit to each electrode block is equal in magnitude and same in polarity as the common electrode signal output by the driving unit to each electrode block.
Further, the voltage compensation unit includes a voltage driving module.
Further, the voltage switch module comprises a voltage switch module, a switch control line and a voltage signal line,
one end of the switch control line is connected to the driving unit, and the other end of the switch control line is connected to the voltage switch module; the driving unit is also used for outputting an opening signal to the voltage switch module through the switch control line during display so as to switch on the interior of the voltage switch module;
one end of the voltage signal wire is connected to the driving unit, and the other end of the voltage signal wire is connected to each driving signal wire through the voltage switch module; the driving unit is also used for outputting a common electrode signal to each electrode block through the voltage signal line, the voltage switch module and each driving signal line during display.
Further, the voltage switch module includes a plurality of voltage switches, and each voltage switch controls the connection or disconnection between the corresponding driving signal line and the voltage signal line.
Further, the voltage switch is a TFT switch.
A driving method of an embedded display screen comprises a display area and a non-display area, wherein the non-display area surrounds the display area, and a plurality of driving signal lines with equal length and a plurality of electrode blocks distributed in an array form are arranged on the display area; in displaying, common electrode signals are simultaneously output to the respective electrode blocks at both ends of the respective driving signal lines so that the electrode blocks serve as common electrodes.
Further, at the time of sensing, a sensing electrode signal is outputted to each electrode block at one end of each driving signal line so that the electrode block functions as a sensing electrode.
Further, the common electrode signal output to each electrode block at one end of each driving signal line is equal in magnitude and same in polarity as the common electrode signal output to each electrode block at the other end of each driving signal line.
The invention has the following beneficial effects: according to the embedded display screen and the driving method thereof, all the driving signal lines are set to be equal in length, and when displaying, public electrode signals are output to all the electrode blocks at two ends of each driving signal line simultaneously.
Drawings
FIG. 1 is a diagram of a conventional embedded display;
FIG. 2 is a schematic view of an embedded display panel according to the present invention;
FIG. 3 is a schematic view of another embedded display panel according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 2 and 3, an in-cell display includes a display area and a non-display area surrounding the display area;
the display area is provided with a plurality of driving signal lines 12 with equal length and a plurality of electrode blocks 11 distributed in an array, and each electrode block 11 is connected with at least one driving signal line 12.
A driving method is applied to the embedded display screen, and time-sharing driving is adopted during driving, so that the electrode block 11 can be used as a common electrode and a sensing electrode (such as a touch sensing electrode or a fingerprint sensing electrode) at the same time, namely, during display driving, sensing driving is not carried out, and similarly, during sensing driving, display driving is not carried out; in displaying, a common electrode signal is simultaneously output to each electrode block 11 at both ends of each driving signal line 12, so that the electrode blocks 11 function as common electrodes; at the time of sensing, a sensing electrode signal is outputted to each electrode block 11 at one end of each driving signal line 12 so that the electrode block 11 functions as a sensing electrode.
According to the embedded display screen and the driving method thereof, all the driving signal lines 12 are set to be equal in length, and when displaying, common electrode signals are output to all the electrode blocks 11 at two ends of each driving signal line 12 simultaneously, because the lengths of all the driving signal lines 12 are equal, on the same driving signal line 12, if the attenuation of the common electrode signal on one end is large during transmission, the attenuation of the common electrode signal on the other end is small during transmission, the common electrode signals on the two ends are finally complementary, so that the sizes of the final common electrode signals on all the driving signal lines 12 are equal, and the display is more uniform.
Specifically, a driving unit 13 and a voltage compensation unit 14 are arranged on a non-display area of the embedded display screen, the driving unit 13 is connected to one end of each driving signal line 12, and the voltage compensation unit 14 is connected to the other end of each driving signal line 12; the driving unit 13 and the voltage compensation unit 14 are configured to output a common electrode signal to each electrode block 11 through each driving signal line 12 at the same time when displaying, so that the electrode block 11 functions as a common electrode.
The common electrode signals output by the driving unit 13 to each electrode block 11 are equal in magnitude and same in polarity as the common electrode signals output by the driving unit 13 to each electrode block 11; and the magnitude of the common electrode signal is equal to that of the common electrode signal used in the conventional in-cell display panel shown in fig. 1.
Meanwhile, the driving unit 13 is further configured to output a sensing electrode signal to each electrode block 11 through each driving signal line 12 at the time of sensing, so that the electrode block 11 functions as a sensing electrode.
The driving unit 13 is a driving chip, and can generate a common electrode signal to be supplied to each electrode block 11 during displaying, and can generate a sensing electrode signal to be supplied to each electrode block 11 during sensing.
In one embodiment, as shown in fig. 2, the voltage compensation unit 14 includes a voltage driving module 141, and the voltage driving module 141 is a separate driving chip, and can separately generate a common electrode signal to be provided to each electrode block 11 during displaying.
In another embodiment, as shown in fig. 3, the voltage switch module 142 includes a voltage switch module 142, a switch control line 143 and a voltage signal line 144,
one end of the switch control line 143 is connected to the driving unit 13, and the other end is connected to the voltage switch module 142; the driving unit 13 is further configured to output an on signal to the voltage switch module 142 through the switch control line 143 during displaying, so as to turn on the inside of the voltage switch module 142;
one end of the voltage signal line 144 is connected to the driving unit 13, and the other end is connected to each driving signal line 12 through the voltage switch module 142; the driving unit 13 is further configured to output a common electrode signal to each electrode block 11 through the voltage signal line 144, the voltage switch module 142, and each driving signal line 12 during displaying.
In this embodiment, the voltage compensation module cannot generate a common electrode signal individually for each electrode block 11 during displaying, but the driving unit 13 needs to generate two common voltage signals at the same time, one common voltage signal is directly output to each electrode block 11 through each driving signal line 12, and the other common voltage signal is output to the voltage switch module 142 through the voltage signal line 144 and then indirectly output to each electrode block 11 through the internally turned-on voltage switch module 142.
The voltage switch module 142 includes a plurality of voltage switches, and each voltage switch controls the connection or disconnection between the corresponding driving signal line 12 and the voltage signal line 144.
In this case, the voltage switch is a TFT switch having a gate, a source, and a drain, the gate of which is connected to the switch control line 143, the source of which is connected to the voltage signal line 144, and the drain of which is connected to the corresponding driving signal line 12; when the grid is at a low level, the source and the drain are disconnected, and the voltage signal line 144 and the corresponding driving signal line 12 are also disconnected; when the gate receives an on signal from the switch signal line, the gate is switched to a high level, the source and the drain are connected, the voltage signal line 144 and the corresponding driving signal line 12 are also connected, and the common voltage signal received by the source from the voltage signal line 144 can be provided to the corresponding electrode block 11 through the drain and the corresponding driving signal line 12.
When the specific embodiment is implemented, the voltage compensation module may include a plurality of switch control lines 143 and a plurality of voltage signal lines 144, each switch control line 143 is correspondingly connected with one or more voltage switches, and each voltage signal line 144 is also correspondingly connected with one or more voltage switches; most preferably, all the voltage switches of the present case share the same switch control line 143 and the same voltage signal line 144 to internally turn on and pass the common voltage signal at the same time.
The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.
Claims (10)
1. An in-cell display screen is characterized by comprising a display area and a non-display area, wherein the non-display area surrounds the display area;
the display area is provided with a plurality of driving signal lines with equal length and a plurality of electrode blocks distributed in an array manner, and each electrode block is connected with at least one driving signal line;
the non-display area is provided with a driving unit and a voltage compensation unit, the driving unit is connected to one end of each driving signal line, and the voltage compensation unit is connected to the other end of each driving signal line; the driving unit and the voltage compensation unit are used for outputting common electrode signals to the electrode blocks through the driving signal lines simultaneously during display so that the electrode blocks can be used as common electrodes.
2. The in-cell display panel of claim 1, wherein the driving unit is further configured to output a sensing electrode signal to each electrode block through each driving signal line during sensing, so that the electrode block functions as a sensing electrode.
3. The in-cell display panel of claim 1, wherein the common electrode signals output by the driving unit to the respective electrode blocks are equal in magnitude and same in polarity as the common electrode signals output by the driving unit to the respective electrode blocks.
4. The in-cell display panel of any of claims 1-3, wherein the voltage compensation unit comprises a voltage driving module.
5. The in-cell display panel of any of claims 1-3, wherein the voltage switch module comprises a voltage switch module, a switch control line, and a voltage signal line,
one end of the switch control line is connected to the driving unit, and the other end of the switch control line is connected to the voltage switch module; the driving unit is also used for outputting an opening signal to the voltage switch module through the switch control line during display so as to switch on the interior of the voltage switch module;
one end of the voltage signal wire is connected to the driving unit, and the other end of the voltage signal wire is connected to each driving signal wire through the voltage switch module; the driving unit is also used for outputting a common electrode signal to each electrode block through the voltage signal line, the voltage switch module and each driving signal line during display.
6. The in-cell display screen of claim 5, wherein the voltage switch module comprises a plurality of voltage switches, each voltage switch controlling a corresponding driving signal line to be connected to or disconnected from the voltage signal line.
7. The in-cell display panel of claim 6, wherein the voltage switch is a TFT switch.
8. The driving method of the embedded display screen is characterized in that the embedded display screen comprises a display area and a non-display area, wherein the non-display area surrounds the display area, and a plurality of driving signal lines with equal length and a plurality of electrode blocks distributed in an array form are arranged on the display area; in displaying, common electrode signals are simultaneously output to the respective electrode blocks at both ends of the respective driving signal lines so that the electrode blocks serve as common electrodes.
9. The method of claim 8, wherein the sensing electrode signal is outputted to each electrode block at one end of each driving signal line during sensing, so that the electrode block functions as a sensing electrode.
10. The method of claim 8, wherein the common electrode signal output to each electrode block at one end of each driving signal line is equal in magnitude and same in polarity as the common electrode signal output to each electrode block at the other end of each driving signal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010477448.8A CN111625148A (en) | 2020-05-29 | 2020-05-29 | Embedded display screen and driving method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010477448.8A CN111625148A (en) | 2020-05-29 | 2020-05-29 | Embedded display screen and driving method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105426026A (en) * | 2014-09-10 | 2016-03-23 | 乐金显示有限公司 | Touch sensing device and display device using the same |
| CN106855763A (en) * | 2017-03-10 | 2017-06-16 | 武汉华星光电技术有限公司 | A kind of array base palte and self-tolerant embedded touch control display panel |
| TW201741824A (en) * | 2016-05-25 | 2017-12-01 | 鴻海精密工業股份有限公司 | Touch panel and display device |
| CN110737140A (en) * | 2019-10-31 | 2020-01-31 | 厦门天马微电子有限公司 | Display panel, control method thereof and display device |
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2020
- 2020-05-29 CN CN202010477448.8A patent/CN111625148A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105426026A (en) * | 2014-09-10 | 2016-03-23 | 乐金显示有限公司 | Touch sensing device and display device using the same |
| TW201741824A (en) * | 2016-05-25 | 2017-12-01 | 鴻海精密工業股份有限公司 | Touch panel and display device |
| CN106855763A (en) * | 2017-03-10 | 2017-06-16 | 武汉华星光电技术有限公司 | A kind of array base palte and self-tolerant embedded touch control display panel |
| CN110737140A (en) * | 2019-10-31 | 2020-01-31 | 厦门天马微电子有限公司 | Display panel, control method thereof and display device |
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Application publication date: 20200904 |
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