CN109584792A - A kind of grayscale gamma fast adjustment method of OLED screen - Google Patents
A kind of grayscale gamma fast adjustment method of OLED screen Download PDFInfo
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- CN109584792A CN109584792A CN201811305869.1A CN201811305869A CN109584792A CN 109584792 A CN109584792 A CN 109584792A CN 201811305869 A CN201811305869 A CN 201811305869A CN 109584792 A CN109584792 A CN 109584792A
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract
The present invention discloses a kind of grayscale gamma fast adjustment method of OLED screen, pass through curve matching mode, the gamma register value of R, G, B and brightness gamma are associated, obtain reasonable gamma register curve, fast and easy calculates the register value for needing to be adjusted grayscale, and can carry out fast search adjustment in small range；The gamma register matched curve for R, G, B that recordable history is debugged, in case data reference in later period debugging；According to the gamma register matched curve of R, G, B that history is debugged, Rapid matching coefficient and the register value of each grayscale currently debugged can be calculated.The present invention first passes through mathematical computations and physical computing reduces gamma register adjusting range, gamma register is quickly adjusted based on quickly searching plain algorithm afterwards, direct ash chromatic graph carries out chromaticity coordinate and is finely adjusted, and is guaranteeing quickly to adjust while guaranteeing that gray scale is shown to meet chromaticity coordinate condition.
Description
Technical field
The invention belongs to photoelectric fields, and in particular to the method for adjustment of OLED screen a kind of more particularly to a kind of OLED screen
Grayscale gamma fast adjustment method.
Background technique
OLED screen have ultra-thin, self-luminous, visual angle is wide, response is fast, luminous efficiency is high, thermal adaptability is good, driving voltage
Low, the features such as low energy consumption, the use of OLED have been a kind of development trends, and it can be family that OLED, which has very wide application prospect,
The end product manufacturers such as electricity, communication, computer, instrument and meter provide new display methods, also bring for consumer more cheap
Portable, browsing, read and ornamental, and OLED needs multiple processes in process of production, and wherein grayscale gamma adjustment just belongs to
In a procedure therein.OLED grayscale gamma adjustment is adjusted mainly for the brightness value of OLED gray display picture, is made
It shows that picture more adapts to human eye and responds to the variation of brightness, reaches preferable display effect.
Referring to attached drawing 1, Gamma is derived from the response curve of the CRT monitor of early stage, that is, output brightness and input voltage
Non-linear relation.So-called gamma adjustment is exactly to be adjusted to the gamma curve of display image, with the image to display screen
Display carries out non-linear tone adjustment, increases dark parts and light-colored part ratio in picture signal, to improve image
Contrast effect.
Gamma adjustment changes input voltage value by adjusting gamma correction register in screen, to change
The output for becoming screen, reaches preferable display effect.
Understand according to inventor, the prior art, which has the disadvantage in that, regulates the speed slowly, is unable to satisfy quick adjustment demand.?
Reasonable adjusting range can not be determined during adjustment gamma register value, and can not the reasonable register value of fast search；
Chromaticity coordinate can not be corrected after to 3 color register gamma adjustment or chromaticity coordinate is regulated the speed relatively slowly, and is not achieved
Ideal effect.
In consideration of it, in order to solve this problem, proposing that a kind of grayscale gamma fast adjustment method of OLED screen is the present invention
The project to be studied.
Summary of the invention
The present invention provides a kind of grayscale gamma fast adjustment method of OLED screen, and its purpose is to solve the prior art
Regulate the speed it is slow, the problem of ideal effect is not achieved.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: a kind of quick side of adjustment the grayscale gamma of OLED screen
Method, including set-up procedure and non-set-up procedure for the first time for the first time；
Wherein, the set-up procedure for the first time follows the steps below operation:
S1, each R, G, the B-register for adjusting 255 grayscale in the picture after OLED screen is lighted based on fast convergence searching algorithm are initial
Value, and by the R, G, B-register initial value write-in gamma register, 255 grayscale is adjusted to object brightness Lv
With target color coordinates (x, y)；
S2 reads the R, G, B-register initial value, and according to formula reg=K* (L/255)γ, calculate next grayscale to be adjusted
Each R, G, B-register value；Wherein, K is each R, G, the B-register initial value of 255 grayscale, and L is grayscale value to be adjusted, and γ is
Gamma coefficient；
Each R, G for the next grayscale to be adjusted being calculated in the S2, B-register value are written the gamma and posted by S3
Storage adjusts next grayscale to be adjusted to object brightness Lv and target color coordinates (x, y)；
S4 is fitted to obtain formula according to each R, G of the grayscale adjusted in the S3 step, B-register value using least square method
Reg=K* (L/255)γMiddle γ value；
S5, and so on, step S3 to S4 is repeated, until needing that grayscale adjustment is adjusted to complete；
S6, according to formula reg=K* (L/255)γ, using least square method be fitted to obtain COEFFICIENT K r, Kg, Kb of each R, G, B and
γr、γg、γb, and COEFFICIENT K r, Kg, Kb and γ that fitting is obtainedr、γg、γbIt is stored in database or data set.
Related content in above-mentioned technical proposal is explained as follows:
1, in above scheme, the non-set-up procedure for the first time follows the steps below operation:
SS1, based on the adjustment of fast convergence searching algorithm by each R, G of 255 grayscale in the picture of OLED screen adjusted for the first time,
255 grayscale under current state are transferred to the object brightness Lv and target color coordinates (x, y) by B-register value；
Each register value of 255 grayscale R, G, the B adjusted in the step SS1 is substituted into formula reg=K* (L/255) by SS2γ
In, design factor K, and matched one group of coefficient is searched for from database or data set；
SS3, according to the obtained coefficient of SS2 and formula reg=K* (L/255)γCalculate the gamma of next grayscale R, G, B to be measured
Register value；
SS4 detects the current Lv brightness of next grayscale to be measured and chromaticity coordinates (x, y)；
SS5 judges whether the current Lv brightness of next grayscale to be measured and chromaticity coordinates (x, y) meet target Lv brightness and color is sat
It marks (x, y), is such as unsatisfactory for, is then quickly adjusted；If met, then SS4 is repeated until all grayscale detections to be measured finish；
SS6, according to formula reg=K* (L/255)γUsing least square method be fitted to obtain COEFFICIENT K r, Kg, Kb of R, G, B and
γr、γg、γb, and the coefficient that fitting obtains is compared with database or data intensive data, such as exist same or similar
Coefficient does not store then, and otherwise obtained coefficient is stored in database or data set.
2, in above scheme, 255 grayscale refers to that grayscale value is 255.Until needing that grayscale adjustment is adjusted to complete, it is often referred to
Be by grayscale value be 0-255 all grayscale adjustment complete.
Due to the above technical solutions, the present invention has the following advantages over the prior art:
The present invention first passes through mathematical computations and physical computing reduces gamma register adjusting range, rear to be based on quickly searching plain algorithm
Quickly adjustment gamma register, directly ash chromatic graph carry out chromaticity coordinate and are finely adjusted, and are guaranteeing quickly adjustment while guaranteeing gray scale
Display meets chromaticity coordinate condition.
Detailed description of the invention
Attached drawing 1 is the non-linear relation schematic diagram that brightness and input voltage are exported in prior art gamma curve；
Attached drawing 2 is the flow diagram of set-up procedure for the first time in the present embodiment fast adjustment method.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments:
A kind of embodiment: grayscale gamma fast adjustment method of OLED screen
Referring to attached drawing 2, including set-up procedure and non-set-up procedure for the first time for the first time, it is grasped on the basis of OLED screen picture is lighted
Make, in the present embodiment, the grayscale value range of OLED screen picture is [0,255], wherein the set-up procedure for the first time is according to following step
Rapid operation:
S1 uses fast convergence searching algorithm to adjust 255 grayscale in the picture after OLED screen is lighted (i.e. grayscale value is 255 picture)
Each R, G, B-register initial value (regR255, regG255, regB255), and by the R, G, B-register initial value
(regR255, regG255, regB255) is respectively written into gamma register, and 255 grayscale is adjusted to object brightness
Lv and target color coordinates (x, y).
S2 reads 255 grayscale R, G, B-register value regR255, regG255, regB255, according to formula reg=K* (L/
255)γ, each register value of gamma of next grayscale R, G, B to be adjusted are calculated, that is, calculates each R, G, B of next grayscale to be adjusted
Register value, at this point, each grayscale to be adjusted is not identical as the value of the modulated grayscale in front；Wherein, K R, G, B gamma post
Storage is in the register value of 255 grayscale, i.e. K is each R, G of 255 grayscale, B-register initial value is i.e. by each R, G, B of 255 grayscale
Value (Kr=regR255, Kg=regG255, Kb=regB255) of the register initial value as K, L are grayscale value to be adjusted, and γ is
Gamma coefficient, γ initial value are 1/2.2.
S3, will be described in each R, G for the next grayscale to be adjusted that be calculated in the S2, the write-in of B-register value
Gamma register is treated and grayscale progress small range is adjusted quickly to adjust, next grayscale to be adjusted is adjusted to object brightness
Lv and target color coordinates (x, y).
S4 is fitted to obtain according to each R, G of the grayscale adjusted in the S3 step, B-register value using least square method
Formula reg=K* (L/255)γMiddle γ value.
S5 repeats S3 to S4, until needing that grayscale adjustment is adjusted to complete.For example, after the 1st adjustment OLED screen is lighted
Picture in 255 grayscale (i.e. grayscale value be 255 pictures) each R, G, B-register initial value, after the 2nd time adjustment OLED screen is lighted
Picture in each R, G of 254 grayscale (i.e. grayscale value be 254 pictures), B-register value, the picture after the 3rd time adjustment OLED screen is lighted
Each R, G of 253 grayscale (i.e. grayscale value is 253 pictures), B-register value in face, and so on, the 256th adjustment OLED screen point
Each R, G of 0 grayscale (i.e. grayscale value is 0 picture), B-register value in picture after bright, until needing that grayscale adjustment is adjusted to complete.
S7, according to formula reg=K* (L/255)γ, it is fitted to obtain COEFFICIENT K r, Kg, Kb of R, G, B using least square method
And γr、γg、γb, and in coefficient deposit database (can be data set) that fitting is obtained.
In the present embodiment, non-set-up procedure for the first time follows the steps below operation:
SS1, based on the adjustment of fast convergence searching algorithm by each R, G of 255 grayscale in the picture of OLED screen adjusted for the first time,
255 grayscale under current state are transferred to the object brightness Lv and target color coordinates (x, y), target at this time by B-register value
Brightness Lv and target color coordinates (x, y) respectively in adjustment for the first time object brightness Lv and target color coordinates (x, y) correspondence it is identical.
Each register value of 255 grayscale R, G, the B adjusted in the step SS1 is substituted into formula reg=K* (L/ by SS2
255)γ, design factor K, and the matched one group of coefficient of search from above-mentioned database (can be data set).
SS3, according to the obtained coefficient of SS2 and formula reg=K* (L/255)γCalculate next grayscale R, G, B to be measured
Gamma register value.
SS4 detects current Lv brightness and the chromaticity coordinates (x, y) of next grayscale to be measured.
SS5, judge the current Lv brightness of next grayscale to be measured and chromaticity coordinates (x, y) whether meet target Lv brightness and
Target color coordinates (x, y), are such as unsatisfactory for, then are quickly adjusted；As met, then step SS4 is repeated until all to be measured
Grayscale detection finishes.Wherein, how to judge whether current Lv brightness and chromaticity coordinates (x, y) meet target Lv brightness and aim colour is sat
Marking (x, y) is the prior art, and details are not described herein again.
SS6, according to formula reg=K* (L/255)γ, it is fitted to obtain COEFFICIENT K r, Kg, Kb of R, G, B using least square method
And γr、γg、γb, and the coefficient that fitting obtains is compared with data in database, such as exist approximate (same or similar)
Coefficient does not store then, and otherwise obtained coefficient is stored in database.
The gamma register value of R, G, B and brightness gamma are associated by the present invention by curve matching mode,
Reasonable gamma register curve is obtained, fast and easy calculates the register value for needing to be adjusted grayscale, and can carry out in small range
Fast search adjustment；The gamma register matched curve for R, G, B that recordable history is debugged, in case number in later period debugging
According to reference；According to the gamma register matched curve of R, G, B that history is debugged, Rapid matching coefficient and can calculate current
The register value of each grayscale of debugging.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art's energy
The solution contents of the present invention much of that are simultaneously implemented accordingly, and it is not intended to limit the scope of the present invention.It is all spiritual according to the present invention
Equivalent change or modification made by essence, should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of grayscale gamma fast adjustment method of OLED screen, it is characterised in that: non-adjust including set-up procedure for the first time and for the first time
Synchronizing is rapid；
Wherein, the set-up procedure for the first time follows the steps below operation:
S1, each R, G, the B-register for adjusting 255 grayscale in the picture after OLED screen is lighted based on fast convergence searching algorithm are initial
Value, and by the R, G, B-register initial value write-in gamma register, 255 grayscale is adjusted to object brightness Lv
With target color coordinates (x, y)；
S2 reads the R, G, B-register initial value, and according to formula reg=K* (L/255)γ, calculate next grayscale to be adjusted
Each R, G, B-register value；Wherein, K is each R, G, the B-register initial value of 255 grayscale, and L is grayscale value to be adjusted, and γ is
Gamma coefficient；
Each R, G for the next grayscale to be adjusted being calculated in the S2, B-register value are written the gamma and posted by S3
Storage adjusts next grayscale to be adjusted to object brightness Lv and target color coordinates (x, y)；
S4 is fitted to obtain formula according to each R, G of the grayscale adjusted in the S3 step, B-register value using least square method
Reg=K* (L/255)γMiddle γ value；
S5, and so on, step S3 to S4 is repeated, until needing that grayscale adjustment is adjusted to complete；
S6, according to formula reg=K* (L/255)γ, using least square method be fitted to obtain COEFFICIENT K r, Kg, Kb of each R, G, B and
γr、γg、γb, and COEFFICIENT K r, Kg, Kb and γ that fitting is obtainedr、γg、γbIt is stored in database or data set.
2. the grayscale gamma fast adjustment method of OLED screen according to claim 1, it is characterised in that:
The non-set-up procedure for the first time follows the steps below operation:
SS1, based on the adjustment of fast convergence searching algorithm by each R, G of 255 grayscale in the picture of OLED screen adjusted for the first time,
255 grayscale under current state are transferred to the object brightness Lv and target color coordinates (x, y) by B-register value；
Each register value of 255 grayscale R, G, the B adjusted in the step SS1 is substituted into formula reg=K* (L/255) by SS2γ
In, design factor K, and matched one group of coefficient is searched for from database or data set；
SS3, according to the obtained coefficient of SS2 and formula reg=K* (L/255)γCalculate the gamma of next grayscale R, G, B to be measured
Register value；
SS4 detects the current Lv brightness of next grayscale to be measured and chromaticity coordinates (x, y)；
SS5, judges whether the current Lv brightness of next grayscale to be measured and chromaticity coordinates (x, y) meet target Lv brightness and target
Chromaticity coordinates (x, y), is such as unsatisfactory for, then is quickly adjusted；If met, then SS4 is repeated until all grayscale to be measured detect
It finishes；
SS6, according to formula reg=K* (L/255)γIt is fitted to obtain COEFFICIENT K r, Kg, Kb and γ of R, G, B using least square methodr、
γg、γb, and the coefficient that fitting obtains is compared with database or data intensive data, such as there is same or similar coefficient
It does not store then, otherwise obtained coefficient is stored in database or data set.
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| CN110310596A (en) * | 2019-06-17 | 2019-10-08 | 武汉精立电子技术有限公司 | A kind of the GAMMA adjusting initial value prediction technique and system of OLED mould group |
| CN110459170A (en) * | 2019-10-11 | 2019-11-15 | 武汉精立电子技术有限公司 | A kind of mould group Gamma bearing calibration, terminal device and computer-readable medium |
| CN110517634A (en) * | 2019-08-28 | 2019-11-29 | 霸州市云谷电子科技有限公司 | Gamma-debugged method, gamma-debugged system and display device |
| CN111524484A (en) * | 2020-04-30 | 2020-08-11 | 苏州佳智彩光电科技有限公司 | Rapid Gamma adjustment method and one-time burning OTP system |
| CN111551348A (en) * | 2020-05-08 | 2020-08-18 | 昆山国显光电有限公司 | Gamma debugging method and device |
| CN114170960A (en) * | 2021-12-07 | 2022-03-11 | 南京国兆光电科技有限公司 | Customized Gamma correction method for silicon-based OLED micro display screen |
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| CN114170960B (en) * | 2021-12-07 | 2023-10-03 | 南京国兆光电科技有限公司 | Custom Gamma correction method for silicon-based OLED micro-display screen |
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