CN106791761A - Improve the uneven GAMMA adjustment methods of LCD screen colour temperature - Google Patents
Improve the uneven GAMMA adjustment methods of LCD screen colour temperature Download PDFInfo
- Publication number
- CN106791761A CN106791761A CN201611176311.9A CN201611176311A CN106791761A CN 106791761 A CN106791761 A CN 106791761A CN 201611176311 A CN201611176311 A CN 201611176311A CN 106791761 A CN106791761 A CN 106791761A
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- lcd screen
- colour temperature
- debugging
- subregion
- gamma
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
-
- 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
- G09G3/2003—Display of colours
-
- 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
Abstract
The present invention relates to LCD screen technology.The present invention is to solve available liquid crystal screen color temperature debugging method cannot ensure whole LCD screen white balance uniformity problem, there is provided a kind of uneven GAMMA adjustment methods of improvement LCD screen colour temperature, its technical scheme can be summarized as：The colour cast situation of LCD screen being observed first, selecting N sectional image signals to send LCD screen to according to colour cast situation, GAMMA debugging is carried out to it with N subregions respectively.The beneficial effects of the invention are as follows facilitating user, it is adaptable to intelligent refrigerator.
Description
Technical field
The present invention relates to LCD screen technology, more particularly to LCD screen colour temperature debugging technique.
Background technology
When different grayscale signals are shown, human eye is easy to go out respectively the slight colour cast shown on GTG to LCD screen,
The namely colour temperature difference in different intensity gray scales.In order to ensure the consistent GTG effect of screen, it is necessary to each different GTG
On RGB (RGB) parameter carry out correspondence compensation, correct color temp deviation, this is must not in LCD TV scheduling and planning
Can lack, referred to as color temperature debugging method.
As LCD TV market competition is aggravated, each producer can all relax OC, the backlight of LCD screen for reduces cost
The quality management and control standard of lamp bar and diaphragm etc., therefore has there is the uneven colour cast of colour temperature unavoidably in single LCD screen, and
According to traditional color temperature debugging method, a GAMMA debugging is only carried out with center's point of screen as debug point, cannot met whole
The white balance correction of individual screen, specific adjustment method can be found in number of patent application for " 201110370678.5 ", entitled " liquid
The patent application of the color temperature debugging method of brilliant screen ", and because with the popularization of the ultra high-definition signal such as 4K, consumer is increasingly
The visual enjoyment of high-quality is pursued, the inconsistent colour cast problem for causing of screen color temp cannot have been stood, it is therefore desirable to Yi Zhongke
Ensure the uniformity of the white balance of whole LCD screen to improve the uneven GAMMA adjustment methods of LCD screen colour temperature.
The content of the invention
Color temperature debugging method the invention aims to solve current LCD screen cannot ensure whole LCD screen
A kind of problem of white balance uniformity, there is provided the uneven GAMMA adjustment methods of improvement LCD screen colour temperature.
The present invention solves its technical problem, and the technical scheme of use is to improve the uneven GAMMA of LCD screen colour temperature to adjust
Method for testing, it is characterised in that comprise the following steps：
The colour cast situation of step 1, observation LCD screen, selects N sectional image signals to send liquid crystal to according to colour cast situation
Screen, GAMMA debugging is carried out to it with N subregions, and it by the whole screen cutting of LCD screen is N number of size that the N subregions refer to
The different subregion of same position；
Step 2, the central point colour temperature and chromaticity coordinates of testing each subregion, judge whether to need debugging, if desired then enter step
Rapid 3, the subregion is not debugged otherwise；
Step 3, each subregion respectively to needing debugging individually carry out GAMMA debugging；
The corresponding GAMMA curve datas of each subregion that step 4, preservation have been debugged, 128 and 255 GTGs after record debugging
Colour temperature numerical value, and write the GAMMA curves of each subregion, debugging is completed.
Specifically, in step 1, the N subregions are 4 subregions or 9 subregions or 16 subregions.
Further, in step 1, comprise the following steps：
Step 101, write linear GAMMA curves in LCD screen and be observed, observe the colour cast situation of LCD screen；
Step 102, according to colour cast situation select N sectional image signals send LCD screen to, it is carried out with N subregions
GAMMA is debugged.
Specifically, before step 101, it is further comprising the steps of：
Step 100, LCD screen to be debugged is carried out preheating reach thermal balance.
Further, in step 2, comprise the following steps：
Step 201, to the luminance signal test N subregions of LCD screen input N subregions 100%, each central point colour temperature and color are sat
Mark, colour temperature is designated as Tm respectively, and chromaticity coordinates is designated as (Xm, Ym) respectively, and m is the positive integer of 0 to N-1, and wherein T0 is in a certain subregion
It is also the central point colour temperature of whole screen while heart point colour temperature, similarly, (X0, Y0) is the same of a certain regional center (RC) point chromaticity coordinates
When be also whole screen central point chromaticity coordinates；
Step 202, by remove T0 Tm values subtract each other with T0 respectively, contrasted according to the value for obtaining and preset value, if greatly
Then it is judged to that the subregion needs debugging in preset value, is otherwise judged to that the subregion need not be debugged.
Specifically, the preset value is 500K.
Further, step 202 can be replaced：
Step 203, (Xm, the Ym) value that will remove (X0, Y0) are subtracted each other with (X0, Y0) obtain (Δ Xm, Δ Ym) respectively, are calculated
Whether Δ Sm=Δ Xm Δ Ym, the Δ Sm that judgement is obtained if more than predetermined value if are judged to the subregion need adjust more than predetermined value
Examination, is otherwise judged to that the subregion need not be debugged.
Specifically, the predetermined value is 0.003.
Further, step 3 is specially：GAMMA debugging is individually carried out to each subregion for needing debugging respectively, and is directed to
Each subregion cross-connecting area, to ensure LCD screen colour temperature uniformity, it is necessary to ensure the cross-connecting area white balance uniformity, colour temperature is without big
Deviation transitions smooth nature, eliminates flex point.
Specifically, step 4 is specially：The corresponding GAMMA curve datas of each subregion that preservation has been debugged, after record debugging
The colour temperature numerical value of 128 and 255 GTGs, and the GAMMA curves of each subregion are write, the luminance signal test of N subregions 100% is input into again
With confirmation debugging result, debugging completion.
The beneficial effects of the invention are as follows uneven by above-mentioned improvement LCD screen colour temperature in the present invention program
GAMMA adjustment methods, LCD screen is divided into multiple subregions carries out GAMMA debugging respectively, it is not necessary to increase test equipment, just
Ensure that the uniformity of the white balance of whole LCD screen.
Specific embodiment
With reference to embodiment, technical scheme is described in detail.
The uneven GAMMA adjustment methods of LCD screen colour temperature that improve of the present invention are：LCD screen is observed first
Colour cast situation, selects N sectional image signals to send LCD screen to according to colour cast situation, and GAMMA tune is carried out to it with N subregions
Examination, it by the whole screen cutting of LCD screen is the different subregion of N number of size same position that the N subregions refer to, re-test is each
The central point colour temperature and chromaticity coordinates of subregion, judge whether to need debugging, if not the subregion is not debugged then, if desired then
GAMMA debugging, the corresponding GAMMA curve numbers of each subregion that preservation has been debugged individually are carried out to each subregion for needing debugging respectively
According to, the colour temperature numerical value of 128 and 255 GTGs after record debugging, and the GAMMA curves of each subregion are write, debugging is completed.
Embodiment
The embodiment of the present invention improves the uneven GAMMA adjustment methods of LCD screen colour temperature, and it is comprised the following steps：
The colour cast situation of step 1, observation LCD screen, selects N sectional image signals to send liquid crystal to according to colour cast situation
Screen, GAMMA debugging is carried out to it with N subregions, and it by the whole screen cutting of LCD screen is N number of size that the N subregions refer to
The different subregion of same position.
In this step, N subregions can be 4 subregions or 9 subregions or 16 subregions, general screen uniformity it is good use 4 points
Area carries out GAMMA debugging, if colour cast it is serious can carry out GAMMA debugging using 9 subregions or 16 subregions, it is not recommended that adopt
Debugged with too high subregion, that can increase debugging work load and implementation complexity.
This step may include step in detail below：
Step 101, write linear GAMMA curves in LCD screen and be observed, observe the colour cast situation of LCD screen；
Step 102, according to colour cast situation select N sectional image signals send LCD screen to, it is carried out with N subregions
GAMMA is debugged.
Before step 101, can also comprise the following steps：
Step 100, LCD screen to be debugged is carried out preheating reach thermal balance.Ensure the optical data brightness in test
With color temperature value accurately and reliably.
Step 2, the central point colour temperature and chromaticity coordinates of testing each subregion, judge whether to need debugging, if desired then enter step
Rapid 3, the subregion is not debugged otherwise.
This step may include following steps：
Step 201, to the luminance signal test N subregions of LCD screen input N subregions 100%, each central point colour temperature and color are sat
Mark, colour temperature is designated as Tm respectively, and chromaticity coordinates is designated as (Xm, Ym) respectively, and m is the positive integer of 0 to N-1, and wherein T0 is in a certain subregion
It is also the central point colour temperature of whole screen while heart point colour temperature, similarly, (X0, Y0) is the same of a certain regional center (RC) point chromaticity coordinates
When be also whole screen central point chromaticity coordinates；
Step 202, by remove T0 Tm values subtract each other with T0 respectively, contrasted according to the value for obtaining and preset value, if greatly
Then it is judged to that the subregion needs debugging in preset value, is otherwise judged to that the subregion need not be debugged.
Wherein, preset value can be 500K.
Step 202 can be replaced：
Step 203, (Xm, the Ym) value that will remove (X0, Y0) are subtracted each other with (X0, Y0) obtain (Δ Xm, Δ Ym) respectively, are calculated
Whether Δ Sm=Δ Xm Δ Ym, the Δ Sm that judgement is obtained if more than predetermined value if are judged to the subregion need adjust more than predetermined value
Examination, is otherwise judged to that the subregion need not be debugged.
Wherein, predetermined value can be 0.003.
Step 3, each subregion respectively to needing debugging individually carry out GAMMA debugging.
This step can be specially：GAMMA debugging is individually carried out to each subregion for needing debugging respectively, and for each subregion
Cross-connecting area, to ensure LCD screen colour temperature uniformity, it is necessary to ensure the cross-connecting area white balance uniformity, colour temperature is without large deviation transition
Smooth nature, eliminates flex point.When GAMM debugging is individually carried out to each subregion, its debud mode is identical with existing debud mode, this
Place is no longer described in detail.
The corresponding GAMMA curve datas of each subregion that step 4, preservation have been debugged, 128 and 255 GTGs after record debugging
Colour temperature numerical value, and write the GAMMA curves of each subregion, debugging is completed.
This step can be specially：The corresponding GAMMA curve datas of each subregion that preservation has been debugged, after record debugging 128
With the colour temperature numerical value of 255 GTGs, and write the GAMMA curves of each subregion, be input into again the luminance signal test of N subregions 100% and
Confirm debugging result, debugging is completed.
Claims (10)
1. the uneven GAMMA adjustment methods of LCD screen colour temperature are improved, it is characterised in that comprised the following steps：
The colour cast situation of step 1, observation LCD screen, selects N sectional image signals to send LCD screen to according to colour cast situation,
GAMMA debugging is carried out to it with N subregions, it by the whole screen cutting of LCD screen is N number of size identical bits that the N subregions refer to
Put different subregions；
Step 2, the central point colour temperature and chromaticity coordinates of testing each subregion, judge whether to need debugging, if desired then enter step 3,
The subregion is not debugged otherwise；
Step 3, each subregion respectively to needing debugging individually carry out GAMMA debugging；
The corresponding GAMMA curve datas of each subregion that step 4, preservation have been debugged, the color of 128 and 255 GTGs after record debugging
Warm numerical value, and the GAMMA curves of each subregion are write, debugging is completed.
2. it is as claimed in claim 1 to improve the uneven GAMMA adjustment methods of LCD screen colour temperature, it is characterised in that step 1
In, the N subregions are 4 subregions or 9 subregions or 16 subregions.
3. it is as claimed in claim 1 to improve the uneven GAMMA adjustment methods of LCD screen colour temperature, it is characterised in that step 1
In, comprise the following steps：
Step 101, write linear GAMMA curves in LCD screen and be observed, observe the colour cast situation of LCD screen；
Step 102, according to colour cast situation select N sectional image signals send LCD screen to, GAMMA is carried out to it with N subregions
Debugging.
4. it is as claimed in claim 1 to improve the uneven GAMMA adjustment methods of LCD screen colour temperature, it is characterised in that step
It is further comprising the steps of before 101：
Step 100, LCD screen to be debugged is carried out preheating reach thermal balance.
5. it is as claimed in claim 1 to improve the uneven GAMMA adjustment methods of LCD screen colour temperature, it is characterised in that step 2
In, comprise the following steps：
Step 201, to the luminance signal test N subregions of LCD screen input N subregions 100% each central point colour temperature and chromaticity coordinates,
Colour temperature is designated as Tm respectively, and chromaticity coordinates is designated as (Xm, Ym) respectively, and m is the positive integer of 0 to N-1, and wherein T0 is a certain regional center (RC) point
It is also the central point colour temperature of whole screen while colour temperature, similarly, while (X0, Y0) is a certain regional center (RC) point chromaticity coordinates
It is the central point chromaticity coordinates of whole screen；
Step 202, by remove T0 Tm values subtract each other with T0 respectively, contrasted according to the value for obtaining and preset value, if be more than in advance
If value is then judged to that the subregion needs debugging, otherwise it is judged to that the subregion need not be debugged.
6. it is as claimed in claim 5 to improve the uneven GAMMA adjustment methods of LCD screen colour temperature, it is characterised in that described
Preset value is 500K.
7. it is as claimed in claim 5 to improve the uneven GAMMA adjustment methods of LCD screen colour temperature, it is characterised in that step
202 can be replaced：
Step 203, (Xm, the Ym) value that will remove (X0, Y0) are subtracted each other with (X0, Y0) obtain (Δ Xm, Δ Ym) respectively, calculate Δ Sm
Whether=Δ Xm Δ Ym, the Δ Sm that judgement is obtained if more than predetermined value if are judged to the subregion need debugging more than predetermined value, no
Then it is judged to that the subregion need not be debugged.
8. it is as claimed in claim 7 to improve the uneven GAMMA adjustment methods of LCD screen colour temperature, it is characterised in that described
Predetermined value is 0.003.
9. it is as claimed in claim 5 to improve the uneven GAMMA adjustment methods of LCD screen colour temperature, it is characterised in that step 3
Specially：GAMMA debugging is individually carried out to each subregion for needing debugging respectively, and for each subregion cross-connecting area, to ensure liquid
Brilliant screen color temp uniformity is, it is necessary to ensure the cross-connecting area white balance uniformity, colour temperature is turned without large deviation transitions smooth nature, elimination
Point.
10. the uneven GAMMA adjustment methods of LCD screen colour temperature, its feature are improved as described in claim 5 or 6 or 7 or 8
It is that step 4 is specially：The corresponding GAMMA curve datas of each subregion that preservation has been debugged, 128 and 255 ashes after record debugging
The colour temperature numerical value of rank, and the GAMMA curves of each subregion are write, the luminance signal test of N subregions 100% is input into again and confirms debugging
As a result, debugging is completed.
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Cited By (5)
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| CN107591134A (en) * | 2017-08-16 | 2018-01-16 | 深圳创维－Rgb电子有限公司 | The compensation method of MURA phenomenons, TV and computer-readable recording medium |
| CN109036260A (en) * | 2018-08-31 | 2018-12-18 | 北京集创北方科技股份有限公司 | Data processing method, display driver chip and display equipment |
| CN109471276A (en) * | 2018-11-07 | 2019-03-15 | 凌云光技术集团有限责任公司 | A kind of liquid crystal display colour cast defect inspection method and device |
| CN110767197A (en) * | 2019-01-31 | 2020-02-07 | 昆山国显光电有限公司 | Display control method, difference information determination device, and display device |
| CN112419989A (en) * | 2019-08-20 | 2021-02-26 | 合肥鑫晟光电科技有限公司 | Correction method of display device |
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| CN112419989A (en) * | 2019-08-20 | 2021-02-26 | 合肥鑫晟光电科技有限公司 | Correction method of display device |
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