CN105388649B - The compensation method of the visual angle colour cast of LCD screen - Google Patents
The compensation method of the visual angle colour cast of LCD screen Download PDFInfo
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- CN105388649B CN105388649B CN201511003613.1A CN201511003613A CN105388649B CN 105388649 B CN105388649 B CN 105388649B CN 201511003613 A CN201511003613 A CN 201511003613A CN 105388649 B CN105388649 B CN 105388649B
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- gamma curve
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- visual angle
- colour cast
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- 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
-
- 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
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
-
- 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
-
- 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
- G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Theoretical Computer Science (AREA)
- Nonlinear Science (AREA)
- Computer Hardware Design (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention discloses a kind of compensation method of the visual angle colour cast of LCD screen, including one face measuring process, one face calculate step, a side view measuring process, a side view calculate step, a compensation calculation step, a corrected Calculation step and a regulating step.It faces difference that local gamma curve and side view local gamma curve obtain using relatively described and obtains the compensation gamma curve, the gamma curve of facing is adjusted, and then the big visual angle colour cast whiting of the LCD screen is made to be obviously improved.
Description
Technical field
The invention relates to a kind of compensation methodes, in particular to a kind of compensation side of the visual angle colour cast of LCD screen
Method.
Background technology
Due to liquid crystal display (Liquid Crystal Display, hereinafter referred to as LCD) screen have energy conservation and environmental protection,
The advantages such as light, are widely used and promote on the field of display at present, wherein being vertically aligned (Vertical-
Alignment, VA) LCD screen product design because the LCD screen has higher contrast and faster response
Speed, and then obtain generally approval in the market.But the LCD screen being vertically aligned and transverse electric field effect display technology (In
Plane Switching Liquid Crystal, IPS) design of display compares, and the LCD screen being vertically aligned has natural
Defect, that is, for big visual angle colour cast (colorshift) phenomenon than more serious, this defect is the LCD screen being vertically aligned
Design is intrinsic, and the low phenomenon of the big visual angle colour cast of the LCD screen can not simultaneously completely eliminate.
Therefore, it is necessary to the LCD screen to the prior art improves, it is low with the big visual angle colour cast for solving the prior art
Problem.
Invention content
In view of this, the purpose of the present invention is to provide a kind of compensation method of the visual angle colour cast of LCD screen, using comparing
It is described to face difference that local gamma curve and side view local gamma curve obtain and obtain the compensation gamma curve, to institute
It states and faces gamma curve and be adjusted, and then the big visual angle colour cast whiting of the LCD screen is made to be obviously improved.
For achieve the above purposes, one embodiment of the invention provides a kind of compensation method of the visual angle colour cast of LCD screen, packet
Containing step 1 face measuring process, one face calculate step, a side view measuring process, a side view calculate step, a compensation calculation
Step, a corrected Calculation step and a regulating step.It is described face measuring process be measure a LCD screen a central point just
Depending on one face gamma curve, such as measured using an instrument；The calculating step of facing is by being faced described in calculating
Gamma curve obtains one and faces local gamma curve；The side view measuring process is the side for the central point for measuring the LCD screen
Depending on a side view gamma curve, wherein a side-looking direction relative to a central point of the LCD screen a normal formed side
Depending on angle α；It is to obtain a side view local gamma curve by calculating the side view gamma curve that the side view, which calculates step,；It is described
Compensation calculation step is to obtain a compensation gal by facing local gamma curve and side view local gamma curve described in calculating
Horse curve；The corrected Calculation step is to obtain an amendment gamma curve by calculating the compensation gamma curve；The adjusting
Step is to adjust the LCD screen, such as while contacting the LCD screen using a probe vertical is adjusted, and makes described face
Gamma curve is adjusted to meeting the amendment gamma curve.
It is in one embodiment of this invention, described that face gamma curve corresponding with grayscale numerical value 0 to 255.
In one embodiment of this invention, the calculation formula for facing local gamma curve is：
Wherein Zn ' faces local gamma curve described in being, Zn is to face the n-th gray-scale intensity, and Z0 is to face minimum brightness,
Z255 is to face maximum brightness, the integer that n is 0 to 255.
In one embodiment of this invention, the side view gamma curve is corresponding with grayscale numerical value 0 to 255.
In one embodiment of this invention, the calculation formula of side view local gamma curve is：
Wherein Cn ' is side view local gamma curve, and Cn is the n-th gray-scale intensity of side view, and C0 is side view minimum brightness,
C255 is side view maximum brightness, the integer that n is 0 to 255.
In one embodiment of this invention, the calculation formula of the compensation gamma curve is：
Bn=2 × (Zn '-Cn ')；
Wherein Bn is to face local gamma curve after compensating.
In one embodiment of this invention, the calculation formula for correcting gamma curve is：
Ln=(Z255-Z0) × (n/255) ^Bn+Z0；
Wherein Ln is the brightness of the n-th grayscale after compensation.
In one embodiment of this invention, the side view angle α is between 0 to 60 degree.
As described previously for the compensation of the visual angle colour cast of the LCD screen, the LCD screen being especially vertically aligned compares
It is described to face difference that local gamma curve and side view local gamma curve obtain and obtain the compensation gamma curve, and
Recalculate the amendment gamma curve according to the compensation gamma curve, by it is described face gamma curve inversely compensation and adjust
To after consistent with the amendments gamma curve, the side view gamma curve will be more nearly described in face gamma curve, and then make
The big visual angle colour cast whiting of the LCD screen is obviously improved.
Description of the drawings
Fig. 1 is a flow chart of a preferred embodiment of the compensation method of the visual angle colour cast of LCD screen of the present invention.
Fig. 2 be a preferred embodiment of the compensation method of the visual angle colour cast of LCD screen of the present invention to face local gamma bent
One relational graph of the local gamma value and grayscale numerical value of line, side view local gamma curve and amendment gamma curve.
Fig. 3 be a preferred embodiment of the compensation method of the visual angle colour cast of LCD screen of the present invention amendment gamma curve and
Face brightness and one relational graph of grayscale numerical value of gamma curve.
Specific implementation mode
The explanation of following embodiment is to refer to additional schema, to illustrate the particular implementation that the present invention can be used to implement
Example.Furthermore the direction term that the present invention is previously mentioned, for example, above and below, top, bottom, front, rear, left and right, inside and outside, side, surrounding, in
Centre, it is horizontal, laterally, vertically, longitudinally, axial direction, radial direction, top layer or lowest level etc., be only the direction with reference to annexed drawings.Cause
This, the direction term used is to illustrate and understand the present invention, rather than to limit the present invention.
Please refer to shown in Fig. 1, be liquid crystal display of the present invention (Liquid Crystal Display, hereinafter referred to as
LCD) a preferred embodiment of the compensation method of the visual angle colour cast of screen, to being vertically aligned (Vertical-
Alignment, VA) the visual angle colour cast of LCD screen compensate, wherein the compensation method of the visual angle colour cast of the LCD screen
Including step 1 face measuring process S201, one face calculate step S202, a side view measuring process S203, a side view calculate step
Rapid S204, a compensation calculation step S205, a corrected Calculation step S206 and a regulating step S207.It is noted that at this
In embodiment, the compensation method first carry out described in face measuring process S201 and it is described face calculate step S202, then again
It carries out the side view measuring process S203 and the side view calculates step S204；In other embodiments, above-mentioned compensation method
The side view measuring process S203 can also first be carried out and the side view calculates step S204, then carry out facing measuring process
S201, one, which face, calculates step S202, and sequence is not limited to the exposure of the present embodiment.The present invention will be in being detailed below
Detail structure, assembled relation and its operation principles of each above-mentioned each component of embodiment.
It is continuous referring to Fig.1 shown in, in facing measuring process S201, it is described face measuring process S201 be using an instrument with
The LCD screen (not being painted) that one direction pair one faced is vertically aligned measures, and then obtains one in face of the LCD screen
One faced of central point faces gamma (gamma) curve Lo, wherein the gamma curve Lo that faces is brightness curve, and with ash
Exponent number value 0 to 255 is corresponding.
It please refers to shown in Fig. 1 and 2, in facing calculating step S202, the calculating step S202 that faces is to pass through calculating
It is described face gamma curve Lo and obtain one face local gamma (Local gamma) curve L1, it is described to face local gamma curve
The calculation formula of L1 is：
Wherein Zn ' faces local gamma curve described in being, Zn is to face the n-th gray-scale intensity, and Z0 is to face minimum brightness,
Z255 is to face maximum brightness, the integer that n is 0 to 255.
Continuous shown referring to Fig.1, in side view measuring process S203, the side view measuring process S203 is to use the instrument
The LCD screen is measured with a side-looking direction, and then obtains the side of the side view for the central point for facing the LCD screen
Depending on gamma (gamma) curve, wherein the side view gamma curve is brightness curve, and it is corresponding with grayscale numerical value 0 to 255.Separately
Outside, the side-looking direction forms a side view angle α relative to a normal of the central point of the LCD screen, in the present embodiment,
The side view angle α is 45 degree (see Fig. 2), and in other embodiments, the angle of the side view angle α can be between 0 to 60 degree.
Continue referring to Fig.1 and shown in 2, in side view calculates step S204, it is to pass through calculating that the side view, which calculates step S204,
The side view gamma curve obtains a side view local gamma curve L2, and the calculation formula of the side view local gamma curve L2 is：
Wherein Cn ' is side view local gamma curve, and Cn is the n-th gray-scale intensity of side view, and C0 is side view minimum brightness,
C255 is side view maximum brightness, the integer that n is 0 to 255.
Continuous shown referring to Fig.1, in compensation calculation step S205, the compensation calculation step S205 is by described in calculating
It faces local gamma curve L1 and side view local gamma curve obtains L2 and obtains a compensation gamma curve, the compensation gamma curve
Calculation formula be：
Bn=2 × (Zn '-Cn ')；
Wherein Bn is to face local gamma curve after compensating.
Continuous shown referring to Fig.1, in corrected Calculation step S206, the corrected Calculation step S206 is by described in calculating
It compensates gamma curve and obtains an amendment gamma curve L3, the calculation formula for correcting gamma curve L3 is：
Ln=(Z255-Z0) × (n/255) ^Bn+Z0；
Wherein Ln is the brightness of the n-th grayscale after compensation.
It please refers to shown in Fig. 1 and 3, in regulating step S207, the regulating step S207 is connect using a probe vertical
The LCD screen is touched and be aligned, and the LCD screen is adjusted, the gamma curve Lo that faces is made to adjust (reverse benefit
Repay) to meeting the amendment gamma curve L3.It is noted that the mode of the adjusting is corresponded to according to 0 to 255 grayscale numerical value
Brightness and standard gamma curve (gamma value 2.2), calculate the brightness that multiple grayscale tie up a little corresponding theoretical value, and then adjust
Current brightness is adjusted to the brightness of theoretical value by voltage, wherein it is 0,1,31,127,223,254 that the grayscale, which ties up numerical value a little,
And 255.
As described previously for the compensation of the visual angle colour cast of the LCD screen, the LCD screen being especially vertically aligned compares
It is described to face local gamma curve L1 and side view local gamma curve obtains the difference of L2 and obtains the compensation gamma curve,
And the amendment gamma curve L3 is recalculated according to the compensation gamma curve, the gamma curve Lo that faces inversely is mended
It repays and adjusts to after consistent with the amendment gamma curve L3, the side view gamma curve, which will be more nearly, described faces gamma song
Line Lo, and then the big visual angle colour cast whiting of the LCD screen is made to be obviously improved.
The present invention is described by above-mentioned related embodiment, however above-described embodiment is only the example for implementing the present invention.
It must be noted that, it has been disclosed that embodiment be not limiting as the scope of the present invention.On the contrary, being contained in the spirit of claims
And range modification and impartial setting be included in the scope of the present invention.
Claims (8)
1. a kind of compensation method of the visual angle colour cast of LCD screen, it is characterised in that：The method includes step：
One faces measuring process, and one faced for measuring a central point of a LCD screen faces gamma curve；
One faces calculating step, and local gamma curve is faced by facing gamma curve acquisition one described in calculating；
One side view measuring process measures a side view gamma curve of the side view of the central point of the LCD screen,
A wherein side-looking direction forms a side view angle α relative to a normal of a central point of the LCD screen；
One side view calculates step, and a side view local gamma curve is obtained by calculating the side view gamma curve；
One compensation calculation step obtains one and mends by facing local gamma curve and side view local gamma curve described in calculating
Repay gamma curve；
One corrected Calculation step obtains an amendment gamma curve by calculating the compensation gamma curve；And
One regulating step adjusts the LCD screen, and the gamma curve of facing is made to adjust to meeting the amendment gamma curve.
2. the compensation method of the visual angle colour cast of LCD screen as described in claim 1, it is characterised in that：It is described to face gamma song
Line is corresponding with grayscale numerical value 0 to 255.
3. the compensation method of the visual angle colour cast of LCD screen as claimed in claim 2, it is characterised in that：It is described to face local gal
The calculation formula of horse curve is：
Wherein Zn ' faces local gamma curve described in being, Zn is to face the n-th gray-scale intensity, and Z0 is to face minimum brightness, and Z255 is
Face maximum brightness, the integer that n is 0 to 255.
4. the compensation method of the visual angle colour cast of LCD screen as claimed in claim 3, it is characterised in that：The side view gamma is bent
Line is corresponding with grayscale numerical value 0 to 255.
5. the compensation method of the visual angle colour cast of LCD screen as claimed in claim 4, it is characterised in that：Side view local gal
The calculation formula of horse curve is：
Wherein Cn ' is side view local gamma curve, and Cn is the n-th gray-scale intensity of side view, and C0 is side view minimum brightness, and C255 is
Side view maximum brightness, the integer that n is 0 to 255.
6. the compensation method of the visual angle colour cast of LCD screen as claimed in claim 5, it is characterised in that：The compensation gamma is bent
The calculation formula of line is：
Bn=2 × (Zn '-Cn ')；
Wherein Bn is to face local gamma curve after compensating.
7. the compensation method of the visual angle colour cast of LCD screen as claimed in claim 6, it is characterised in that：The amendment gamma is bent
The calculation formula of line is：
Ln=(Z255-Z0) × (n/255) ^ Bn+Z0；
Wherein Ln is the brightness of the n-th grayscale after compensation.
8. the compensation method of the visual angle colour cast of LCD screen as described in claim 1, it is characterised in that：The side view angle α is
Between 0 to 60 degree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511003613.1A CN105388649B (en) | 2015-12-28 | 2015-12-28 | The compensation method of the visual angle colour cast of LCD screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511003613.1A CN105388649B (en) | 2015-12-28 | 2015-12-28 | The compensation method of the visual angle colour cast of LCD screen |
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| CN105388649A CN105388649A (en) | 2016-03-09 |
| CN105388649B true CN105388649B (en) | 2018-09-28 |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106251822A (en) * | 2016-09-27 | 2016-12-21 | 南京中电熊猫液晶显示科技有限公司 | A kind of colour cast control method of liquid crystal display |
| CN106601200A (en) * | 2016-12-08 | 2017-04-26 | 深圳市华星光电技术有限公司 | Drive method and drive device of display panel and display device |
| CN107068096A (en) * | 2017-05-11 | 2017-08-18 | 京东方科技集团股份有限公司 | Gamma voltage compensation systems, method and display device |
| CN107358929B (en) | 2017-08-28 | 2019-03-05 | 惠科股份有限公司 | Method for calculating visual angle compensation of display device, visual angle compensation structure and display device |
| CN108320716B (en) | 2018-01-10 | 2019-09-17 | 惠科股份有限公司 | Driving method and device of display panel |
| CN108335678B (en) | 2018-01-10 | 2019-09-17 | 惠科股份有限公司 | Driving method and device of display panel |
| CN109147712B (en) * | 2018-10-08 | 2020-06-26 | 惠州市华星光电技术有限公司 | Method and system for improving visual angle color cast of display panel |
| CN109300434B (en) * | 2018-10-31 | 2021-01-15 | 上海天马微电子有限公司 | Display device and adjusting method of viewing angle chromatic aberration thereof |
| KR102705271B1 (en) * | 2018-11-14 | 2024-09-11 | 삼성디스플레이 주식회사 | Display device |
| CN109410871A (en) * | 2018-12-12 | 2019-03-01 | 惠科股份有限公司 | Display device and display control method |
| CN109729331A (en) * | 2018-12-29 | 2019-05-07 | 深圳Tcl新技术有限公司 | Display screen color regards solution, TV, computer readable storage medium and system |
| CN110310588A (en) * | 2019-06-27 | 2019-10-08 | 昆山国显光电有限公司 | A kind of display device |
| CN111292697A (en) * | 2020-03-27 | 2020-06-16 | Tcl华星光电技术有限公司 | Method for improving color cast of display device |
| CN111796440B (en) * | 2020-07-07 | 2023-07-25 | Tcl华星光电技术有限公司 | Display panel adjusting method and device |
| CN112767891B (en) * | 2021-01-20 | 2022-07-12 | Tcl华星光电技术有限公司 | Mura compensation method, display panel and display device |
| CN116631350B (en) * | 2023-05-26 | 2024-04-12 | 惠科股份有限公司 | Display color shift optimization method, display driving method and display |
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