CN114694611A - Novel liquid crystal residual image processing technology for Mini LED display screen - Google Patents
Novel liquid crystal residual image processing technology for Mini LED display screen Download PDFInfo
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- CN114694611A CN114694611A CN202210020493.XA CN202210020493A CN114694611A CN 114694611 A CN114694611 A CN 114694611A CN 202210020493 A CN202210020493 A CN 202210020493A CN 114694611 A CN114694611 A CN 114694611A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 42
- 238000005516 engineering process Methods 0.000 title claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 230000003068 static effect Effects 0.000 claims abstract description 10
- 206010047571 Visual impairment Diseases 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims abstract description 3
- 230000002441 reversible effect Effects 0.000 claims abstract description 3
- 230000007704 transition Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000008054 signal transmission Effects 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
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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
- G09G3/3406—Control of illumination source
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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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
- G09G2320/0257—Reduction of after-image effects
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
A novel liquid crystal afterimage processing technology of a Mini LED display screen comprises a connecting module and a liquid crystal display module; the connecting module respectively outputs a first signal and a second signal, the first signal is converted into a channel signal SPI with the number of BLU partitions, the second signal is a picture signal, and the second signal is input into the liquid crystal display module; the connection module comprises a detection module and a signal compensation module, the detection module is used for detecting a display picture of the liquid crystal module, the signal compensation module is used for providing a compensation signal, and when the detection module detects that the display picture is a high gray scale difference picture in a static mode, the signal compensation module is enabled to perform reverse direction compensation on liquid crystal channels in corresponding areas of the high gray scale picture and the low gray scale picture and channel voltages of the Mini-LED, so that deflection voltages of different gray scale areas of the liquid crystal display module are kept consistent. The lighting test performance of the checkerboard detection picture is greatly improved, the performance is greatly improved when special application scenes such as frame backgrounds of electronic books and education machines are used for a long time, and the problem of liquid crystal residual images caused by long-term static lighting can be almost eliminated.
Description
Technical Field
The invention relates to the field of liquid crystal display modules, in particular to a novel liquid crystal residual image processing technology for a Mini LED display screen.
Background
And displaying the picture to be displayed on the liquid crystal display panel frame by adjusting the gray scale of each sub-pixel in the liquid crystal display panel, wherein the duration of each image frame is not equal so as to reduce the DC bias voltage existing in the sub-pixel. The disadvantages of this approach are: 1. changing the duration of the image frame, namely increasing the duration, namely reducing the data refreshing frequency and enabling the image frame to flicker visually; 2. another is to shorten the duration, i.e. increase the refresh frequency, which may result in insufficient charging time and failure of normal display.
The liquid crystal display displays a static picture for a long time, which causes the accumulation of biased charges, and the accumulation of charges in different areas with larger gray scale difference in the same static picture causes the residual image left in the next picture to be a residual image, especially under the application conditions of electronic tags, electronic books, background frames of education machines, and the like. Therefore, in order to solve the above problems, a novel liquid crystal afterimage processing process for a Mini LED display screen is required.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel liquid crystal residual image processing technology of a Mini LED display screen, and the specific technical scheme is as follows:
a novel liquid crystal residual image processing technology for a Mini LED display screen is characterized by comprising the following steps: the LCD device comprises a connecting module and an LCD module;
the connection module respectively outputs a first signal and a second signal, the first signal is converted into a channel signal SPI with the number of BLU partitions, the second signal is a picture signal, and the second signal is input into the liquid crystal display module;
the connection module comprises a detection module and a signal compensation module, the detection module is used for detecting a display picture of the liquid crystal module, the signal compensation module is used for providing a compensation signal, and when the detection module detects that the display picture is a high gray scale difference picture in a static mode, the signal compensation module is enabled to perform reverse direction compensation on liquid crystal channel voltages of corresponding areas of the high gray scale picture and the low gray scale picture and channel voltages of the Mini-LED, so that deflection voltages of different gray scale areas of the liquid crystal display module are kept consistent.
Further: and setting a transition frame in N frames before switching pictures every time, gradually transitioning the voltage of the liquid crystal module and the channel voltage of the LED to a final value in the N frames of the transition frame, and reducing the visual impact of sudden brightness change, wherein N is a value less than the refresh frequency number.
The invention has the beneficial effects that: the lighting test performance of the checkerboard detection picture is greatly improved, the performance is greatly improved when special application scenes such as frame backgrounds of electronic books and education machines are used for a long time, and the problem of liquid crystal residual images caused by long-term static lighting can be almost eliminated.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a static image of the source of the SOC signal detected by the detection module;
FIG. 3 is the backlight data of the liquid crystal module before compensation;
FIG. 4 is the compensated backlight data of the liquid crystal module;
FIG. 5 is a diagram of step-by-step switching data of the BLU signal.
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.
As shown in fig. 1:
the utility model provides a novel Mini LED display screen liquid crystal afterimage processing technology, the picture signal transmission of complete machine output to connecting module, this connecting module corresponds Briger MCU in figure 1, this connecting module contains detection module and signal compensation module, this connecting module exports two way signals of first signal and second signal respectively, first signal converts the picture signal into the channel signal SPI of BLU subregion number, the second signal is with picture signal to liquid crystal display module.
The detection module is used for detecting a display picture of the liquid crystal module, the signal compensation module is used for providing a compensation signal, when the detection module detects that the display picture is a high gray scale difference picture in a static mode, the signal compensation module is enabled to automatically compensate liquid crystal channel and Mini-LED channel voltages in corresponding areas of the high gray scale picture and the low gray scale picture in opposite directions, deflection voltages of different gray scale areas of the liquid crystal panel are kept consistent as much as possible, transition frames are set in N frames before pictures are switched every time, the liquid crystal Source voltage and the LED Source voltage are gradually transited to final values in the N frame transition frames according to step, and the impact of brightness mutation on vision is reduced, wherein N is a proper value smaller than a refreshing frequency number.
Specifically, as shown in fig. 3, the detection module detects that the data gray scale difference of different areas of the image is large in the static mode, starts the dynamic compensation function, adjusts the BLU brightness corresponding to the "L0" area to L0, and adjusts the liquid crystal Source voltage to "L255" to be consistent with the Source voltage of the high gray scale area as shown in fig. 4, i.e., the bias characteristic of the whole liquid crystal is balanced, and when the image is switched to other common images, no image retention occurs.
As long as the detection module detects the picture and the Source voltages of different gray scale areas of the liquid crystal panel are basically consistent by changing the Mini-LED and the liquid crystal channel voltage, the transition frame is required to be included no matter the transition frame is set in the detection mode or the detection mode is exited.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. A novel liquid crystal residual image processing technology for a Mini LED display screen is characterized by comprising the following steps: the LCD device comprises a connecting module and an LCD module;
the connection module respectively outputs a first signal and a second signal, the first signal is converted into a channel signal SPI with the number of BLU partitions, the second signal is a picture signal, and the second signal is input into the liquid crystal display module;
the connection module comprises a detection module and a signal compensation module, the detection module is used for detecting a display picture of the liquid crystal module, the signal compensation module is used for providing a compensation signal, and when the detection module detects that the display picture is a high gray scale difference picture in a static mode, the signal compensation module is enabled to perform reverse direction compensation on liquid crystal channel voltages of corresponding areas of the high gray scale picture and the low gray scale picture and channel voltages of the Mini-LED, so that deflection voltages of different gray scale areas of the liquid crystal display module are kept consistent.
2. The novel liquid crystal afterimage processing process for the Mini LED display screen according to claim 1, which is characterized in that: and setting a transition frame in N frames before switching pictures every time, gradually transitioning the voltage of the liquid crystal module and the channel voltage of the LED to a final value in the N frames of the transition frame, and reducing the visual impact of sudden brightness change, wherein N is a value less than the refresh frequency number.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210020493.XA CN114694611A (en) | 2022-01-10 | 2022-01-10 | Novel liquid crystal residual image processing technology for Mini LED display screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210020493.XA CN114694611A (en) | 2022-01-10 | 2022-01-10 | Novel liquid crystal residual image processing technology for Mini LED display screen |
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| CN114694611A true CN114694611A (en) | 2022-07-01 |
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| CN202210020493.XA Pending CN114694611A (en) | 2022-01-10 | 2022-01-10 | Novel liquid crystal residual image processing technology for Mini LED display screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115909972A (en) * | 2022-11-29 | 2023-04-04 | 京东方科技集团股份有限公司 | Display control method, display driver chip, device and storage medium |
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| JP2003207762A (en) * | 2001-11-09 | 2003-07-25 | Sharp Corp | Liquid crystal display device |
| CN102074207A (en) * | 2009-11-20 | 2011-05-25 | 群康科技(深圳)有限公司 | Liquid crystal display |
| CN105096829A (en) * | 2015-08-18 | 2015-11-25 | 青岛海信电器股份有限公司 | Ghost shadow elimination method and device and displayer |
| CN106205523A (en) * | 2016-07-13 | 2016-12-07 | 深圳市华星光电技术有限公司 | The ameliorative way of liquid crystal indicator image retention and device |
| CN107331357A (en) * | 2017-06-22 | 2017-11-07 | 深圳市华星光电技术有限公司 | Improve the method for liquid crystal display panel ghost |
| CN108538252A (en) * | 2018-04-13 | 2018-09-14 | 京东方科技集团股份有限公司 | A kind of voltage compensating method, device, display equipment and calculate readable storage medium storing program for executing |
| CN110648643A (en) * | 2019-09-30 | 2020-01-03 | 京东方科技集团股份有限公司 | Voltage adjusting method and device and display device |
| CN112951161A (en) * | 2021-02-24 | 2021-06-11 | 厦门天马微电子有限公司 | Display panel driving method and display device |
-
2022
- 2022-01-10 CN CN202210020493.XA patent/CN114694611A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003207762A (en) * | 2001-11-09 | 2003-07-25 | Sharp Corp | Liquid crystal display device |
| CN102074207A (en) * | 2009-11-20 | 2011-05-25 | 群康科技(深圳)有限公司 | Liquid crystal display |
| CN105096829A (en) * | 2015-08-18 | 2015-11-25 | 青岛海信电器股份有限公司 | Ghost shadow elimination method and device and displayer |
| CN106205523A (en) * | 2016-07-13 | 2016-12-07 | 深圳市华星光电技术有限公司 | The ameliorative way of liquid crystal indicator image retention and device |
| CN107331357A (en) * | 2017-06-22 | 2017-11-07 | 深圳市华星光电技术有限公司 | Improve the method for liquid crystal display panel ghost |
| CN108538252A (en) * | 2018-04-13 | 2018-09-14 | 京东方科技集团股份有限公司 | A kind of voltage compensating method, device, display equipment and calculate readable storage medium storing program for executing |
| CN110648643A (en) * | 2019-09-30 | 2020-01-03 | 京东方科技集团股份有限公司 | Voltage adjusting method and device and display device |
| CN112951161A (en) * | 2021-02-24 | 2021-06-11 | 厦门天马微电子有限公司 | Display panel driving method and display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115909972A (en) * | 2022-11-29 | 2023-04-04 | 京东方科技集团股份有限公司 | Display control method, display driver chip, device and storage medium |
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Application publication date: 20220701 |