CN106448610B - The method for solving colour cast under liquid crystal display low brightness signal - Google Patents
The method for solving colour cast under liquid crystal display low brightness signal Download PDFInfo
- Publication number
- CN106448610B CN106448610B CN201611143123.6A CN201611143123A CN106448610B CN 106448610 B CN106448610 B CN 106448610B CN 201611143123 A CN201611143123 A CN 201611143123A CN 106448610 B CN106448610 B CN 106448610B
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- voltage
- gamma
- liquid crystal
- low brightness
- brightness signal
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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
-
- 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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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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)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention discloses the method for solving colour cast under liquid crystal display low brightness signal, this method comprises: adjusting the Gamma correction voltage value under low brightness signal intensity by equal proportion, to improve the driving voltage and windup-degree under low brightness signal, to compensate liquid crystal color, so that liquid crystal display not colour cast.The colour cast complementary color under liquid crystal display low brightness signal may be implemented in the method for solving colour cast under liquid crystal display low brightness signal.
Description
Technical field
The present invention relates to liquid crystal display brightness regulations, and in particular, to solves under liquid crystal display low brightness signal partially
The method of color.
Background technique
In liquid crystal display low brightness signal, since the torsion inertia of liquid crystal is larger.The starting driving needed
Voltage is higher, and the torsion inertia of liquid crystal molecule is also variant.Therefore the windup-degree of different liquid crystals is different, such dark field signal
Brightness it is relatively low, while there is obvious colour cast in dark balance under low signal brightness, and can not be mended with normal color lamp color-complementing method
It repays.
Summary of the invention
The object of the present invention is to provide a kind of methods of colour cast under solution liquid crystal display low brightness signal, solve liquid crystal
The colour cast complementary color under liquid crystal display low brightness signal may be implemented in the method for colour cast under display screen low brightness signal.
To achieve the goals above, the present invention provides a kind of sides of colour cast under solution liquid crystal display low brightness signal
Method, this method comprises:
The Gamma correction voltage value under low brightness signal intensity is adjusted by equal proportion, to improve the drive under low brightness signal
Dynamic voltage and windup-degree, to compensate liquid crystal color, so that liquid crystal display not colour cast.
Preferably, the method for the driving voltage under raising low brightness signal and windup-degree includes:
The picture signal sent out by the DA translation circuit to TCON plate is to carry out the nonlinear transformation close to S-shaped, pixel
Voltage and gamma-corrected voltage synthesis superposition obtain resultant voltage, and resultant voltage is added to the display unit of liquid crystal display.
Preferably, chip is generated by gamma power supply and generates gamma-corrected voltage, the gamma power supply generates the type of chip
Number be BUF20820AIDCPR.
Preferably, the gamma power supply generates 18 channels in chip and exports the gamma-corrected voltage, and in addition are produced from 2 channels
The gamma-corrected voltage of raw VCOM voltage, each channel output is different.
Preferably, include: by the method that equal proportion adjusts the Gamma correction voltage value under low brightness signal intensity
It is compared according to predeterminated voltage benchmark and the resultant voltage, is lower than the resultant voltage in predeterminated voltage benchmark
When, reduce Gamma correction voltage value；When predeterminated voltage benchmark is higher than the resultant voltage, Gamma correction voltage value is improved.
Preferably, chip is generated to the gamma power supply by FPGA to control, export different gamma-corrected voltages.
The present invention is allowed to different degrees of increase by finely tuning 256 rank low and middle-end of gamma curve, 64 rank RGB coefficient, can be more
Mend the problem of dark balance cannot be considered in terms of.When dark field brightness is relatively low, to 256 rank low and middle-end of gamma curve, 64 rank RGB gamma value into
The promotion of row same degree is improved with driving voltage and windup-degree is properly increased.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the connection figure for illustrating the circuit of colour cast under a kind of solution liquid crystal display low brightness signal of the invention.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Traditional color-complementing method is to carry out complementary color using turquoise color lamp, but the complementary color can expire under the conditions of brightness is higher
The requirement of coordinate of standard purity.But when luminance signals are lower.Since liquid crystal molecule inertia enhances.The difference of deflection angle.It needs higher
Driving voltage.Traditional color-complementing method is unable to satisfy colour cast problem under low-light level.
The present invention provides a kind of method for solving colour cast under liquid crystal display low brightness signal, this method comprises:
The Gamma correction voltage value under low brightness signal intensity is adjusted by equal proportion, to improve the drive under low brightness signal
Dynamic voltage and windup-degree, to compensate liquid crystal color, so that liquid crystal display not colour cast.
By above-mentioned mode, require signal colour under low-light level to meet user normally without obvious colour cast.
The present invention is allowed to different degrees of increase by finely tuning 256 rank low and middle-end of gamma curve, 64 rank RGB coefficient, can be more
Mend the problem of dark balance cannot be considered in terms of.When dark field brightness is relatively low, to 256 rank low and middle-end of gamma curve, 64 rank RGB gamma value into
The promotion of row same degree is improved with driving voltage and windup-degree is properly increased.
Below in conjunction with attached drawing 1, the application is further detailed, in order to improve the scope of application of the application, especially
It is realized using following specific embodiments.
In a kind of specific embodiment of the invention, in order to improve the driving voltage and torsion angle under low brightness signal
Degree, this method comprises:
The picture signal sent out by the DA translation circuit to TCON plate is to carry out the nonlinear transformation close to S-shaped, pixel
Voltage and gamma-corrected voltage synthesis superposition obtain resultant voltage, and resultant voltage is added to the display unit of liquid crystal display.
By above-mentioned mode, the input-output curve of liquid crystal display systems is finally made to meet actual requirement.Make liquid crystal display
Reproduction restores well arranged coloury image.
In this embodiment, chip is generated by gamma power supply and generates gamma-corrected voltage, the gamma power supply produces
The model BUF20820AIDCPR of raw chip.
In this embodiment, the gamma power supply generates 18 channels in chip and exports the gamma-corrected voltage,
Other 2 channel generates VCOM voltage, and the gamma-corrected voltage of each channel output is different.
The generation of gamma electric voltage value is that professional gamma power supply generates chip first, is exported by said chip different
Gamma electric voltage.
Wherein, V1~V16 is the voltage value that gamma chip generates.It can be with gamma power supply core by the SPI communication of FPGA
18,19 feet of piece carry out communication and export different gamma values,.By finely tuning gamma value under low-light level, i.e. fine adjustment V1~V4's
Voltage value is changed the colour cast problem under low brightness signal.
In this embodiment, the method for the Gamma correction voltage value under low brightness signal intensity is adjusted by equal proportion
May include:
It is compared according to predeterminated voltage benchmark and the resultant voltage, is lower than the resultant voltage in predeterminated voltage benchmark
When, reduce Gamma correction voltage value；When predeterminated voltage benchmark is higher than the resultant voltage, Gamma correction voltage value is improved.
By above-mentioned mode, the adjustment of Gamma correction voltage may be implemented.
In this embodiment, chip is generated to the gamma power supply by FPGA to control, export different gals
Horse correction voltage.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (3)
1. a kind of method for solving colour cast under liquid crystal display low brightness signal, which is characterized in that this method comprises:
The Gamma correction voltage value under low brightness signal intensity is adjusted by equal proportion, to improve the electricity of the driving under low brightness signal
Pressure and windup-degree, to compensate liquid crystal color, so that liquid crystal display not colour cast；
The driving voltage and the method for windup-degree improved under low brightness signal include:
The picture signal sent out by the DA translation circuit to TCON plate is to carry out the nonlinear transformation close to S-shaped, pixel voltage
Resultant voltage is obtained with gamma-corrected voltage synthesis superposition, resultant voltage is added to the display unit of liquid crystal display；
Chip is generated by gamma power supply and generates gamma-corrected voltage, and the gamma power supply generates the model of chip
BUF20820AIDCPR；
The gamma power supply generates 18 channels in chip and exports the gamma-corrected voltage, and in addition 2 channels generate VCOM voltage,
The gamma-corrected voltage of each channel output is different.
2. the method according to claim 1 for solving colour cast under liquid crystal display low brightness signal, which is characterized in that pass through
The method of Gamma correction voltage value under equal proportion adjustment low brightness signal intensity includes:
It is compared according to predeterminated voltage benchmark and the resultant voltage, when predeterminated voltage benchmark is lower than the resultant voltage,
Reduce Gamma correction voltage value；When predeterminated voltage benchmark is higher than the resultant voltage, Gamma correction voltage value is improved.
3. the method according to claim 1 for solving colour cast under liquid crystal display low brightness signal, which is characterized in that pass through
FPGA generates chip to the gamma power supply and controls, and exports different gamma-corrected voltages.
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| CN201611143123.6A CN106448610B (en) | 2016-12-13 | 2016-12-13 | The method for solving colour cast under liquid crystal display low brightness signal |
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| CN201611143123.6A CN106448610B (en) | 2016-12-13 | 2016-12-13 | The method for solving colour cast under liquid crystal display low brightness signal |
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| CN106448610B true CN106448610B (en) | 2019-02-12 |
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| CN110648628B (en) * | 2019-09-29 | 2021-10-22 | 联想(北京)有限公司 | Display processing method, display processing device and electronic equipment |
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| JP2006058603A (en) * | 2004-08-20 | 2006-03-02 | Sony Corp | Flat display device and driving method for flat display device |
| CN1953032A (en) * | 2005-10-21 | 2007-04-25 | 神基科技股份有限公司 | Gamma correction and system with this gamma correction |
| CN101419783A (en) * | 2007-10-22 | 2009-04-29 | 中华映管股份有限公司 | Gamma curve correcting method |
| CN101556774A (en) * | 2008-04-10 | 2009-10-14 | 北京京东方光电科技有限公司 | Device and method for driving liquid crystal display |
| CN102347005A (en) * | 2010-07-30 | 2012-02-08 | 奇美电子股份有限公司 | Image adjusting method and device |
| CN102708813A (en) * | 2011-05-12 | 2012-10-03 | 京东方科技集团股份有限公司 | Liquid crystal display device and liquid crystal display method |
| CN105895044A (en) * | 2016-06-07 | 2016-08-24 | 深圳市华星光电技术有限公司 | Liquid crystal display and method for improving large view angle color bias of liquid crystal display |
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2016
- 2016-12-13 CN CN201611143123.6A patent/CN106448610B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006058603A (en) * | 2004-08-20 | 2006-03-02 | Sony Corp | Flat display device and driving method for flat display device |
| CN1953032A (en) * | 2005-10-21 | 2007-04-25 | 神基科技股份有限公司 | Gamma correction and system with this gamma correction |
| CN101419783A (en) * | 2007-10-22 | 2009-04-29 | 中华映管股份有限公司 | Gamma curve correcting method |
| CN101556774A (en) * | 2008-04-10 | 2009-10-14 | 北京京东方光电科技有限公司 | Device and method for driving liquid crystal display |
| CN102347005A (en) * | 2010-07-30 | 2012-02-08 | 奇美电子股份有限公司 | Image adjusting method and device |
| CN102708813A (en) * | 2011-05-12 | 2012-10-03 | 京东方科技集团股份有限公司 | Liquid crystal display device and liquid crystal display method |
| CN105895044A (en) * | 2016-06-07 | 2016-08-24 | 深圳市华星光电技术有限公司 | Liquid crystal display and method for improving large view angle color bias of liquid crystal display |
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