CN113823244A - Panel driving circuit supporting high refresh rate display technology - Google Patents
Panel driving circuit supporting high refresh rate display technology Download PDFInfo
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- CN113823244A CN113823244A CN202111315301.XA CN202111315301A CN113823244A CN 113823244 A CN113823244 A CN 113823244A CN 202111315301 A CN202111315301 A CN 202111315301A CN 113823244 A CN113823244 A CN 113823244A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 26
- 201000005569 Gout Diseases 0.000 claims description 12
- 230000006866 deterioration Effects 0.000 abstract description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 238000005457 optimization Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a panel driving circuit supporting a high-refresh-rate display technology, which comprises a driving module, a voltage stabilizing module and a frequency conversion module, wherein the driving circuit of the frequency conversion module consists of two elements and three input signals, wherein the two elements are an N-type TFT and a P-type TFT respectively, the three input signals are VSS, FRSW and VSSL respectively, the source electrode of the N-type TFT is electrically connected to the VSSL, the grid electrode of the N-type TFT is used for receiving a first control signal FRSW, the drain electrode of the N-type TFT is electrically connected to the voltage stabilizing module, the source electrode of the P-type TFT is electrically connected to the VSS, the drain electrode of the P-type TFT is electrically connected to the voltage stabilizing module, the grid electrode of the P-type TFT is used for receiving a second control signal FRSW, two signal receiving ports for transmitting signals through the frequency conversion module are arranged on the voltage stabilizing module, and on the premise of only increasing the prolonging of the leakage time, the risk of pixel leakage and the display deterioration are reduced.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a panel driving circuit supporting a high-refresh-rate display technology.
Background
The high refresh rate display technology can make the dynamic picture switch more smooth, and is more excellent in the electronic competition game experience and the movie experience. However, as the display refresh rate increases, the liquid crystal panel itself has certain challenges, such as optimization of the driving circuit, selection of faster liquid crystal, increase of panel power consumption, and the like; in addition, when the terminal realizes the dynamic refresh rate adjustment, the purpose of keeping the display time fixed and then realizing frequency conversion by increasing or reducing the blank time is often adopted.
There is a LCD panel that can support the refresh rate of 120Hz, resolution HD + (720 RGB 1640). Its one-frame time is 8.3ms, effective display time is 6.6ms, blank time is 1.7 ms. When it is switched to 90Hz display, the one frame time is 11.1ms, the effective display time is still 6.6ms, and the blank time is increased to 4.5 ms. When it is switched to 60Hz display, the one frame time is 16.7ms, the effective display time is still 6.6ms, and the blank time is increased to 10.1 ms. When it is switched to 30Hz, the one-frame time is 33.3ms, the effective display time is still 6.6ms, and the blank time is increased to 26.7ms, as shown in the dynamic frequency conversion data display of the liquid crystal display panel of the attached FIG. 3 of the specification.
The following disadvantages still remain: although the scheme is easy to achieve the purpose of dynamic frequency conversion, when switching to low-frequency operation, the blank time is prolonged, which results in that the time for maintaining the pixel voltage is also prolonged, the risk of electric leakage is increased, the accuracy of data display is affected, and thus the brightness and color effect of display with different refresh rates are affected.
Disclosure of Invention
The present invention is directed to a panel driving circuit supporting a high refresh rate display technology to solve the above-mentioned problems.
In order to achieve the purpose, the invention provides the following technical scheme: a panel driving circuit supporting high refresh rate display technology comprises a driving module, a voltage stabilizing module and a frequency conversion module, wherein the driving circuit of the frequency conversion module consists of two elements and three input signals, wherein the two elements are an N-type TFT and a P-type TFT respectively, the three input signals are VSS, FRSW and VSSL respectively, the source electrode of the N-type TFT is electrically connected to the VSSL, the grid electrode is used for receiving a first control signal FRSW, the drain electrode of the N-type TFT is electrically connected to the voltage stabilizing module, the source electrode of the P-type TFT is electrically connected to the VSS, the drain electrode of the P-type TFT is electrically connected to the voltage stabilizing module, the grid electrode is used for receiving a second control signal FRSW, two signal receiving ports for transmitting signals through the frequency conversion module are arranged on the voltage stabilizing module, the voltage stabilizing module provides low level support for GOUT output of the driving module, the voltage stabilizing module is electrically connected with the driving module and supplies power to the driving module, the frequency conversion module improves the closing voltage of a Gate signal required by the action of the in-plane pixel TFT, and the driving module comprises four ports which are STV, RST, CLK and GOUT respectively.
As a further optimization of this solution, the FRSW is low at 90Hz operation at high frequency, and the Gate signal low level at this time is controlled by VSS, so as to confirm that the pixel TFT is turned off at a lower voltage when the leakage time is longer, thereby preventing the pixel leakage.
As a further optimization of the present technical solution, the FRSW is at a high level during the low frequency 60Hz operation, and the Gate signal low level at this time is controlled by the lower VSSL, so that the TFT can be turned off with a lower voltage under the condition that the leakage time is increased, thereby preventing the leakage.
As a further optimization of the technical solution, the driving module is connected to an STV interface end, and the STV interface end is used for scanning an input signal of the driving module.
As a further optimization of the technical solution, the driver module is respectively connected to a RST interface end and a CLK interface end, the CLK interface end is used for the driver module to control the time of signal input, and the RST interface end is used for the driver module to initialize signals in a circuit.
As a further optimization of the technical solution, the driving module is connected to a GOUT interface end, and the GOUT interface end is used for outputting signals of the driving module.
The invention has the technical effects and advantages that: the panel driving circuit supporting the high refresh rate display technology is additionally provided with a frequency conversion module on the basis of a traditional driving module and a voltage stabilizing module, the driving circuit of the frequency conversion module consists of two elements and three input signals, wherein the two elements are an N-type TFT and a P-type TFT respectively, the three input signals are VSS, FRSW and VSSL respectively, the FRSW is used for adjusting the frequency of a frame number, the FRSW is in a low level when the FRSW operates at a high frequency of 90Hz, the low level of a Gate signal is controlled by the VSS, the FRSW is in a high level when the FRSW operates at a high frequency of 60Hz, and the low level of the Gate signal is controlled by the VSSL.
The frequency conversion module of the panel driving circuit can be composed of more groups of TFT switches, can meet the requirements of high-refresh panels and dynamic switching under different refresh rates. On the premise of only increasing the blank time (prolonging the leakage time), the risk of pixel leakage and display deterioration is reduced, and when the liquid crystal display is applied at different refresh rates, the leakage time of the liquid crystal display is different, and the low-frequency leakage time is longer than the high-frequency leakage time.
Drawings
FIG. 1 is a driving circuit diagram of the present invention;
FIG. 2 is a timing diagram illustrating the operation of the frequency conversion module according to the present invention;
FIG. 3 is a diagram of a dynamic frequency conversion data display of the LCD panel according to the present invention.
In the figure: 1. a drive module; 2. a voltage stabilization module; 3. and a frequency conversion module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a panel driving circuit supporting a high refresh rate display technology comprises a driving module 1, a voltage stabilizing module 2 and a frequency conversion module 3, wherein the driving circuit of the frequency conversion module 3 consists of two elements and three input signals, wherein the two elements are an N-type TFT and a P-type TFT respectively, the three input signals are VSS, FRSW and VSSL respectively, the source electrode of the N-type TFT is electrically connected to the VSSL, the grid electrode is used for receiving a first control signal FRSW, the drain electrode of the N-type TFT is electrically connected to the voltage stabilizing module 2, the source electrode of the P-type TFT is electrically connected to VSS, the drain electrode of the P-type TFT is electrically connected to the voltage stabilizing module 2, the grid electrode is used for receiving a second control signal FRSW, two signal receiving ports for transmitting signals through the frequency conversion module 3 are arranged on the voltage stabilizing module 2, the voltage stabilizing module 2 provides low level support for GOUT output of the driving module 1, the voltage stabilizing module 2 is electrically connected with the driving module 1 and supplies power to the driving module 1, the frequency conversion module 3 improves the turn-off voltage of a Gate signal required by the in-plane pixel TFT action, the driving module 1 comprises four ports, the four ports are respectively STV, RST, CLK and GOUT, the driving module 1 is connected with an STV interface end, the STV interface end is used for scanning an input signal of the driving module 1, the driving module 1 is respectively connected with an RST interface end and a CLK interface end, the CLK interface end is used for controlling the signal input time of the driving module 1, the RST interface end is used for initializing a signal in a circuit of the driving module 1, the driving module 1 is connected with the GOUT interface end, and the GOUT interface end is used for outputting the signal of the driving module 1.
As shown in fig. 2, FRSW is at a low level when operating at 90Hz, and the Gate signal at this time is controlled by VSS, which is used to switch the voltage regulator module 2 between the frequency converter modules 3 when operating at 60Hz, and FRSW is at a high level when operating at this time by VSSL being lower.
According to the panel driving circuit supporting the high-refresh-rate display technology, the two circuit modules, namely the driving module 1 and the voltage stabilizing module 2, are driving circuits used in the existing liquid crystal display, and can be a 7T1C circuit or a 13T1C circuit, and the output waveform of the traditional GIP circuit is easily affected by the leakage of a transistor (especially a depletion transistor), so that the output waveform of the GIP circuit is distorted. The distorted output waveform can cause the on and off of the transistor in the display area in the display screen to cause the display of the display screen to be abnormal, so that a 7T1C circuit or a 13T1C circuit is selected, the frequency conversion module 3 consists of 2 elements and 3 input signals, and according to the difference of the use refresh rate, the control signal FRSW outputs high level or low level to provide VSS or VSSL for the voltage stabilizing circuit.
Specifically, referring to fig. 1, it is a first stage of a Gate driving circuit of an in-plane pixel TFT, and different from a common design, the circuit in the technical solution is provided with a frequency conversion module 3 in addition to the original driving module 1 and voltage stabilizing module 2.
Specifically, referring to fig. 2, the frequency conversion module of the present invention may be composed of more groups of TFT switches, and is not limited to the embodiment, and when dynamic changes of three refresh rates of 120Hz/90Hz/60Hz are required, the frequency conversion module may be separately driven by low-level voltages of three levels;
the technical scheme provides a new panel driving circuit, so that the pixel voltage holding capacity is better guaranteed when the high refresh panel carries out dynamic frequency conversion, and the due brightness and color level can still be kept in a longer blank time.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a support panel drive circuit of high refresh rate display technology, includes drive module (1), voltage stabilizing module (2) and frequency conversion module (3), its characterized in that: the driving circuit of the frequency conversion module (3) is composed of two elements and three input signals, wherein the two elements are an N-type TFT and a P-type TFT respectively, the three input signals are VSS, FRSW and VSSL respectively, the source electrode of the N-type TFT is electrically connected to VSSL, the grid electrode is used for receiving a first control signal FRSW, the drain electrode of the N-type TFT is electrically connected to a voltage stabilizing module (2), the source electrode of the P-type TFT is electrically connected to VSS, the drain electrode of the P-type TFT is electrically connected to a voltage stabilizing module (2), the grid electrode is used for receiving a second control signal FRSW, the voltage stabilizing module (2) is provided with two signal receiving ports for transmitting signals through the frequency conversion module (3), the voltage stabilizing module (2) provides low level standard position support for GOUT output of the driving module (1), the voltage stabilizing module (2) is electrically connected with the driving module (1) and supplies power to the driving module (1), the frequency conversion module (3) enables the closing voltage of a Gate signal required by the in-plane pixel TFT to act to be obtained, the driving module (1) comprises four ports, and the four ports are STV, RST, CLK and GOUT respectively.
2. A panel driving circuit supporting a high refresh rate display technology according to claim 1, wherein: FRSW is low at 90Hz, and Gate signal low is controlled by VSS.
3. A panel driving circuit supporting a high refresh rate display technology according to claim 1, wherein: the FRSW is high when operating at low frequency 60Hz, and the Gate signal low level is controlled by VSSL.
4. A panel driving circuit supporting a high refresh rate display technology according to claim 1, wherein: the driving module (1) is connected with an STV interface end, and the STV interface end is used for scanning input signals of the driving module (1).
5. A panel driving circuit supporting a high refresh rate display technology according to claim 1, wherein: the driving module (1) is respectively connected with a RST interface end and a CLK interface end, the CLK interface end is used for controlling the time of signal input of the driving module (1), and the RST interface end is used for initializing signals in a circuit by the driving module (1).
6. A panel driving circuit supporting a high refresh rate display technology according to claim 1, wherein: the driving module (1) is connected with a GOUT interface end, and the GOUT interface end is used for outputting signals of the driving module (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315301.XA CN113823244A (en) | 2021-11-08 | 2021-11-08 | Panel driving circuit supporting high refresh rate display technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315301.XA CN113823244A (en) | 2021-11-08 | 2021-11-08 | Panel driving circuit supporting high refresh rate display technology |
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| CN113823244A true CN113823244A (en) | 2021-12-21 |
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| CN202111315301.XA Pending CN113823244A (en) | 2021-11-08 | 2021-11-08 | Panel driving circuit supporting high refresh rate display technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115731895A (en) * | 2022-11-24 | 2023-03-03 | 惠科股份有限公司 | Control method of driving circuit, driving circuit and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162570A (en) * | 2006-10-10 | 2008-04-16 | 精工爱普生株式会社 | Power supply circuit, driver circuit, electro-optical device, electronic instrument, and common electrode drive method |
| CN104332182A (en) * | 2014-10-03 | 2015-02-04 | 友达光电股份有限公司 | Shift register device |
| US20200265786A1 (en) * | 2018-12-11 | 2020-08-20 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Pixel drive circuit, display device and driving method |
| CN113284454A (en) * | 2021-06-30 | 2021-08-20 | 云谷（固安）科技有限公司 | Pixel circuit and display panel |
| CN216212273U (en) * | 2021-11-08 | 2022-04-05 | 福建华佳彩有限公司 | Panel driving circuit supporting high refresh rate display technology |
-
2021
- 2021-11-08 CN CN202111315301.XA patent/CN113823244A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162570A (en) * | 2006-10-10 | 2008-04-16 | 精工爱普生株式会社 | Power supply circuit, driver circuit, electro-optical device, electronic instrument, and common electrode drive method |
| CN104332182A (en) * | 2014-10-03 | 2015-02-04 | 友达光电股份有限公司 | Shift register device |
| US20200265786A1 (en) * | 2018-12-11 | 2020-08-20 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Pixel drive circuit, display device and driving method |
| CN113284454A (en) * | 2021-06-30 | 2021-08-20 | 云谷（固安）科技有限公司 | Pixel circuit and display panel |
| CN216212273U (en) * | 2021-11-08 | 2022-04-05 | 福建华佳彩有限公司 | Panel driving circuit supporting high refresh rate display technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115731895A (en) * | 2022-11-24 | 2023-03-03 | 惠科股份有限公司 | Control method of driving circuit, driving circuit and display device |
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