CN100388348C - Automatic measurement and correction method and system for LCD GAMMA curve and color temperature - Google Patents
Automatic measurement and correction method and system for LCD GAMMA curve and color temperature Download PDFInfo
- Publication number
- CN100388348C CN100388348C CNB2005100502013A CN200510050201A CN100388348C CN 100388348 C CN100388348 C CN 100388348C CN B2005100502013 A CNB2005100502013 A CN B2005100502013A CN 200510050201 A CN200510050201 A CN 200510050201A CN 100388348 C CN100388348 C CN 100388348C
- Authority
- CN
- China
- Prior art keywords
- gamma
- correction
- lcd
- colour temperature
- measurement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012937 correction Methods 0.000 title claims abstract description 55
- 238000005259 measurement Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000013078 crystal Substances 0.000 claims description 33
- 239000012085 test solution Substances 0.000 claims description 33
- 238000004891 communication Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 11
- 238000009529 body temperature measurement Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 230000009897 systematic effect Effects 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000001915 proofreading effect Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000012790 confirmation Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 102000003668 Destrin Human genes 0.000 abstract 1
- 108090000082 Destrin Proteins 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Landscapes
- Controls And Circuits For Display Device (AREA)
- Liquid Crystal Display Device Control (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
The present invention provides a method and a system for LCD GAMMA curvature correction and color temperature automatic adjustment. The system comprises a system host computer, a detector, a color analyzer, a video standard signal source, a data interface and a system measurement and correction software, and the present invention can carry out the GAMMA curvature correction and white balance adjustment to general-purpose TV and computer displays such as LCD, high clear rear projection, etc. and the LCD with a plurality of structures such as TN, STN, DSTN, TFT, etc. so as to improve the display quality of video images of the LCD. The system host computer integrates a plurality of video signal sources, GAMMA curved line and colour temperature automatic measurement and correction software and data interfaces into a whole, system parameters can be arranged manually or automatically, and the system configuration is simple. The GAMMA correction and the calling of the white balance adjustment software are convenient, the GAMMA curved line and colour temperature automatic measurement and correction of the LCD can be completed rapidly, and the correction effect can be detected visually. The present invention can be used for departments such as scientific research, production, quality detection and maintenance, and the GAMMA curvature correction and the white balance adjustment for LCD products can be completed rapidly and visually with high accuracy.
Description
Affiliated field
Patent of the present invention relates to video display apparatus and measures and alignment technique, the LCD of multi-purpose TV, computer monitor and TN (twisted nematic) such as the LCD of especially suitable employing GAMMA curve and colour temperature measurement and correction, high definition rear-projection, STN (super-twist nematic), DSTN (double-layer super-twist nematic), TFT multiple structures such as (film transistor types) is used for the said goods in the GAMMA of production, detection and maintenance process curve and the automatic method and system of measuring and proofreading and correct of colour temperature.
Background technology
At present, the liquid crystal display applications scope is wide, the every field that entered society and come into huge numbers of families, and the pattern of display comprises desk-top and laptop computer displays, industrial electronic screen, desk-top televisor, rear-projection and plasma TV etc.With matrix LCD LCD video picture principle is example, it is based on liquid crystal is placed between two electro-conductive glass, the driven effect of electric field between two electrodes, cause the liquid crystal molecule twisted-nematic, the transmission of control light source forms the image demonstration of light and shade with covering, but by means of colored filter display color image.
As everyone knows, the electro-optic transfer characteristic of liquid crystal display device is determined by glass substrate, liquid crystal material and concentration, driving circuit, and is relevant with driving voltage.As shown in Figure 1, when driving voltage was between driving voltage threshold value V1 and saturation voltage value V2, the transmittance of liquid crystal display device and driving voltage just had better linearity.And the electro-optical characteristic that meets human eye vision is as shown in Figure 2, human eye vision view and admire brightness to details in a play not acted out on stage, but told through dialogues change responsive, the slight change that can differentiate gray scale, and the luminosity of bright field is changed insensitive, gray level resolution is poor.Because the LCD electro-optic transfer characteristic has very big-difference with the electro-optical characteristic that meets human eye vision, LCD can not guarantee to reappear the gray shade scale of scenery, if the electric light transformation curve of R, G, B three primary colours (or discrete) inequality, as Fig. 3, white color can not be reappeared, then the white balance error can be occurred.Therefore, the electro-optic transfer characteristic of LCD must be through overcorrect, so that meet the electro-optical characteristic of human eye vision.The electro-optic transfer characteristic of LCD generally adopts manual debugging to proofread and correct, and relies on commissioning staff's vision and experience to debug and proofread and correct.
Existing LCD alignment technique: publication number is the Jap.P. " Device And Method For Correcting GAMMA Voltage And Video Data OfLiquid Crystal Display Device " of 2002-123232, and the GAMMA corrective system does not adopt white balance to measure and adjust; Publication number is the Jap.P. " GAMMA Characteristic CorrectingMethod For Liquid Crystal Display Device And Liquid Crystal DisplayDevice " of 05-298604, and the method for correcting liquid crystal display gray-level characteristic adopts brightness photometer.
There is following defective in prior art:
(1) brightness and the color of each GTG of human eye evaluating liquid crystal display, be subjected to the restriction of operating personnel's factors such as level, experience and environment, the GAMMA curve and the white balance of manual synchronizing LCD can not guarantee the GTG reproduction of product and the performance that white balance is adjusted;
(2) system of correcting liquid crystal display gray-level characteristic adopts brightness photometer, can not measure and proofread and correct GAMMA curve red, green, Lan Sanse simultaneously, and the efficient that GAMMA proofreaies and correct is low, and calibration result is poor.
(3) adopt and not have the GAMMA corrective system that function was measured and adjusted to white balance, can't behind correcting liquid crystal display gray-level characteristic, remake white balance and measure and adjust, thereby further visual test GAMMA curvature correction effect;
(4) along with the continuous development of lcd technology, the GAMMA curvature correction system of prior art needs the specification of video signal source more, adopts the hardware system of the video signal source that separates, and configuration is complicated, operates not simple and direct.
Summary of the invention
In order to overcome the above-mentioned shortcoming of prior art, patent of the present invention proposes a kind of LCD GAMMA curve and the automatic measurement of colour temperature and bearing calibration and system.System host integrates video signal source, GAMMA curve and the automatic measurement of colour temperature and correction software and signal processor, system configuration is simple, GAMMA proofreaies and correct and white balance is adjusted software transfer conveniently, can finish fast the GAMMA curve of LCD and the automatic measurement and the correction of colour temperature, and visual test GAMMA curvature correction effect.
The technical solution used in the present invention is:
LCD GAMMA curve and colour temperature are measured and bearing calibration automatically, and LCD GAMMA curve and colour temperature measure automatically and bearing calibration comprises the following steps:
(1) at first setting up LCD GAMMA curve and colour temperature measures and corrective system automatically, this system comprises system host, detector, color analyzer, video signal source, data-interface and systematic survey and correction software, and system host is equipped with operating system in advance;
(2) the test solution crystal display being inserted LCD GAMMA curve and colour temperature measures and corrective system automatically;
(3) system has the mode of alternative measurement and correction: GAMMA curved measurement and correction, white balance are measured and are adjusted; If select GAMMA curved measurement and correction, change step (4); If select white balance to measure and adjust, change step (5);
(4) GAMMA curved measurement and correction:
A. start-up system GAMMA curved measurement and correction program;
B. communications status self check:
Check system main frame and I
2The communications status of C bus interface board and color analyzer, system works for confirmation is normal;
C., correlation parameter is set:
1. the GTG of selecting measurement and proofreading and correct has 8,16,32,64,128,256 rank available;
2. select the vision signal pattern: AV pattern, VGA pattern are arranged, available;
3. the GAMMA correcting theory directrix curve that meets human eye is set;
D. use linear GAMMA correction coefficient C
(K, I)=I, I=1～256 GTG; K=R, G, B three looks, the GAMMA that upgrades the test solution crystal display shows;
E. the system host control signal is according to the grey exponent number of setting, change test signal by " step pitch ", receive color analyzer to the measurement data result of each GTG color and carry out computing, obtain the red, green, blue three look output light intensity L of test solution crystal display
(K, I), and actual GAMMA curve send monitor to show;
System host calculates conversion of signals coefficient A by following formula
(K, I):
L
(K，I)＝A
(K，I)C
(K，I)/I (1)
In the formula: I is the input signal of 256 GTGs, I=1～256;
K is the RGB component, K=R, G, B;
L
(K, I)Red, green, blue three look output light intensities for the test solution crystal display;
C
(K, I)Be the data of test solution crystal display RGB component in the GAMMA table of corrections;
F. the GAMMA correcting theory curve that meets human eye according to setting is measured actual GAMMA curve, by formula (1) by the step pitch interpolation calculation, to the RGB redgreenblue calculated signals GAMMA correction coefficient C under each GTG value
(K, I)
G. use new GAMMA correction coefficient C
(K, I)Upgrade the GAMMA table of corrections of test solution crystal display;
H. repeat e., f., g. three processes, with the GAMMA curvature correction of test solution crystal display to the theoretical curve value;
I. the GAMMA calibration result figure that shows by monitor confirms the result to test solution crystal display GAMMA curved measurement and correction;
(5) white balance is measured and is adjusted:
A. the start-up system white balance is measured the adjustment program;
B. select to adjust automatically or artificial the adjustment;
1) the adjustment parameter is set:
1. select to measure passage;
2. select the white balance adjusting process;
3. error is adjusted in white chromaticity coordinates of established standards and permission;
4. white brightness value and allow to adjust error sets up standard;
2) self-adjusting I
2The C parameter is provided with:
1. adjust the memory address of qualified white balance parameter value;
2. preset the RGB initial value of three rifle bright fields and details in a play not acted out on stage, but told through dialogues;
3. the scalable numerical value span of white balance parameter is set;
4. select to adjust the time limit;
C. system host is controlled white field signal source and is produced bright field or details in a play not acted out on stage, but told through dialogues white signal, and receives the measurement result chromaticity coordinates x that color analyzer transmits, y value, brightness Y numerical value, and the error amount of demonstration and signal standards;
D. according to the error amount that shows, manual or adjust the chromaticity coordinates and the brightness of bright field or details in a play not acted out on stage, but told through dialogues automatically;
E. the error amount of bright field and details in a play not acted out on stage, but told through dialogues all qualified after, finish that white balance is measured and adjust.
LCD GAMMA curve that described method constitutes and colour temperature are measured and corrective system automatically, comprise system host, detector, color analyzer, video signal source, data communication interface and systematic survey and correction software, are:
(1) described system host is Industrial Control Computer or PC;
(2) described detector is the chromaticity detector that has the optical imagery camera lens;
(3) described video signal source comprises: video VGA and AV signal source, and wherein vision signal is from independently video signal source or video signal source plug-in card;
(4) described data-interface comprises: system bus interface, serial communication interface;
(5) described systematic survey and correction software comprise: GAMMA curved measurement and correction software and colour temperature measurement and adjustment software, software loading is on system host.
Described LCD GAMMA curve and colour temperature are measured and corrective system automatically, and be: described video signal source plug-in card comprises VGA signal plug-in card and AV signal plug-in card, in the slot of insertion system main frame.
Described LCD GAMMA curve and colour temperature are measured and corrective system automatically, be: described system host is Industrial Control Computer or the PC that disposes video VGA and AV signal plug-in card and data communication bus interface card plate, in the slot of signal source plug-in card and data communication bus interface card plate insertion system main frame.
Described LCD GAMMA curve and colour temperature are measured and corrective system automatically, are: the type of test solution crystal display comprises TN (twisted-nematic) type, STN (supertwist is to row) type, the Twisted Nematic of DSTN (double layers super twisted nematic) type, TFT (thin film transistor (TFT)) type thin film transistor.
Described LCD GAMMA curve and colour temperature are measured and corrective system automatically, and be: the distance L of test solution crystal display and detector is fixed between 0～140mm.
Substantial effect of the present invention:
(1) system host has the video signal source plug-in card of measuring GAMMA curve and white balance adjustment, multiple signal source can produce institute's video and need signal, be convenient under the unlike signal environment, LCD be carried out integrated correction, and be convenient to system's miniaturization and complete machineization.
(2) system has colour temperature measurement and calibration system, GAMMA is proofreaied and correct the actual effect of back colour temperature and can measure, and measures fast, and effect is directly perceived.
(3) working software has strong suitability, can use various types of color analyzers polytype LCD to be carried out the measurement and the correction of GAMMA curve and white balance.
(4) chromaticity coordinates and the brightness under the different GTGs of system's energy measurement, the effect that GAMMA is proofreaied and correct can detect intuitively.
(5) adopt color analyzer, receive RGB three look gray level video signal, measure and proofread and correct the GAMMA curve of RGB three looks simultaneously.
The present invention proposes a kind of LCD GAMMA curvature correction and colour temperature automatic adjusting method and system, this system comprises system host, detector, color analyzer, video standard signal source, data-interface and systematic survey and correction software, can realize multiple structural liquid crystal displays such as multi-purpose TV, computer monitor and TN, STN, DSTN, TFT such as LCD, high definition rear-projection TV are carried out GAMMA curvature correction and white balance adjustment, so that improve the video image display quality of LCD.System host integrates various video signal source and data-interface, systematic parameter can be selected to adopt manual or be provided with automatically, be applied to scientific research, production, quality inspection and maintenance department, high precision, finish LCD GAMMA curvature correction and white balance adjustment quickly and intuitively.
Description of drawings
Fig. 1 is the synoptic diagram of LCD LCD electro-optical characteristic;
Fig. 2 is the TV electro-optical characteristic synoptic diagram that meets human eye vision;
Fig. 3 is the RGB three look GAMMA curve synoptic diagrams without the correcting liquid crystal display;
Fig. 4 is LCD GAMMA curve of the present invention and one of colour temperature measurement and automatic correction system embodiment block diagram;
Fig. 5 is two of LCD GAMMA curve of the present invention and colour temperature measurement and automatic correction system embodiment block diagram;
Fig. 6 measures and the correcting process sketch automatically for LCD GAMMA curve of the present invention;
Fig. 7 measures and adjusts general flow chart automatically for LCD white balance of the present invention;
Fig. 8 is a design sketch before the embodiment of the invention LCD GAMMA curvature correction.
Embodiment
Describe the course of work of LCD GAMMA curve of the present invention and the automatic measurement of colour temperature and bearing calibration and system embodiment in detail to accompanying drawing 9 below in conjunction with accompanying drawing 4.
One of LCD GAMMA curve of the present invention that Fig. 4 provides and colour temperature measurement and automatic correction system embodiment block diagram, LCD GAMMA curve and colour temperature measurement and automatic correction system are made of computing machine 13, detector 11, color analyzer 12, video signal source 14, data communication interface 15 and systematic survey and the correction software of band monitor, and video signal source 14 wherein and data communication interface 15 are separate equipment or device; The video inputs of test solution crystal display 16 connects the output terminal of video signal source 14, the control end of video signal source 14 connects the control interface of computing machine 13, detector 11 picks up color signal from test solution crystal display 16 display screens, detector 11 output terminals are connected on the input end of color analyzer 12, the output terminal of color analyzer 12 is added in the data communication mouth of computing machine 13, and the GAMMA table of corrections data-carrier store input end of test solution crystal display 16 is received in the signal output of computing machine 13 through data communication interface 15.
Fig. 5 provides LCD GAMMA curve of the present invention and colour temperature measurement and second embodiment block diagram of automatic correction system, this system is made up of the vision signal detector 52 and the system host 53 of CM-7L color analyzer 51 and standard configuration thereof, and the test solution crystal display is 54.System host 53 is a main frame with the industrial computer 531 of band monitor 534, lump line interface plug-in card 532 and video signal source plug-in unit 533 and GAMMA correction software 535 and white balance are adjusted software 536 automatically and are one, bus interface plug-in card 532 and video signal source plug-in unit 533 insert respectively in the card slots of industrial computer 531 mainboards, and industrial computer 531 mainboards are set up respectively with video signal source plug-in unit 533 with bus interface plug-in card 532 and communicated by letter and control linkage.Bus interface plug-in card 532 adopts the Philips I with multi-host communication function
2C bus interface plug-in card, video signal source plug-in unit 533 comprises AV signal plug-in card and the VGA signal plug-in card of being with lead-out terminal, and the video output terminal of the communication interface of bus interface plug-in card 532 and video signal source plug-in unit 533 is connected respectively to the display chip serial transmission mouth and the video input terminal of test solution crystal display 54.Vision signal detector 52 is high precision chromaticity transducers of band optical imagery camera lens, the signal input part incoming video signal detector 52 of CM-7L color analyzer 51, the RS232 serial delivery outlet of CM-7L color analyzer 51 inserts the RS232 serial input port of industrial computer 531; Measuring distance between test solution crystal display 54 and the vision signal detector 52 should remain on the arbitrary value between 0 to 140mm.
Below in conjunction with Fig. 6 and Fig. 7 the flow process that two LCD GAMMA curves of the embodiment of the invention and colour temperature measurement and automatic correction system are measured and adjusted automatically the automatic measurement of test solution crystal display GAMMA curve and correcting process and white balance is described:
Each device power-up of system, software brings into operation.At first main frame 531 sends the self check control signal to bus interface board 53, and whether the inquiry bus interface board is working properly.After the bus interface board return signal, it is normal communicate by letter between expression main frame and the bus board, if the not response of certain hour internal bus plate represents then between main frame and the bus board that foundation is communicated by letter, points out on monitor 534 interfaces.After bus communication is normal, enters parameter the interface is set, bus parameter manually or automatically is set; Signal exponent number and variation step pitch.
Under measurement pattern, at first system host 531 control of video signal sources 533 send black signal to test solution LCD 54, measure the chromaticity coordinates x of LCD, y and brightness Y, according to the 1931CIE chromaticity coordinate system, be the survey Parameters Transformation tristimulus values of color, then, change the GTG signal according to " step pitch " that be provided with, increase the brightness of signal, measure the also chromaticity coordinates x of tracer signal once more, y and brightness Y value, data processing, compute correction data.Repeat above-mentioned step, be changed to maximal value, finish measurement up to the GTG signal.After one group of data being surveyed are made normalized, be X-axis with the input signal strength, the tristimulus values of output is a Y-axis, draws test solution crystal display GAMMA curve, and is presented on the monitor 54.After finishing the measurement pattern measurement, change correction mode automatically over to.The GAMMA theoretical curve that meets human eye at first is set, then, according to the parameter that is provided with, after measuring the actual GAMMA curve of liquid crystal display device again, call computing module, with reference to the GAMMA theoretical curve, after the GAMMA table correction data that calculating makes new advances, call serial communication modular, the new GAMMA table data of calculating are written to the E of liquid crystal display device
2Among the PROM.Can remeasure the GAMMA curve of the liquid crystal display device under new correction data correction at last.The match situation of ideal curve and measured curve more once.
After finishing LCD GAMMA curvature correction, the start-up system white balance is measured and the adjustment program.Select to adjust automatically or artificial the adjustment, system enters the white balance measurement pattern.
The adjustment parameter at first is set:
1. select the main channel and the accessory channel of measurement.Have 0～29 to amount to 30 main channels selection is provided, the LCD that can be every kind of model is set a main channel.Have 1～6 to amount to 6 accessory channels selection is provided.The corresponding a kind of colour temperature of each accessory channel can be provided with the parameter of corresponding accessory channel.
2. select the white balance adjusting process.Have red rifle to fix, green electron gun is fixed, blue electron gun is fixed three kinds of technologies, the model of visual test solution crystal display is selected different adjusting processes.
3. error is adjusted in white chromaticity coordinates of established standards and permission.Set chromaticity coordinates x, the y of bright field and details in a play not acted out on stage, but told through dialogues, the x under the CIE1931 colorimeter system of permission, y deviate, or the JND deviation that allows.Color space can be selected the CIE1931xyz space, or the even color space of CIE1964uv, and the even color space of CIE1976u ' v '.
4. error is adjusted in established standards white brightness Y and permission.
Self-adjusting I
2The C parameter is provided with:
1. address of devices and memory address, data span.
2. preset the RGB initial value of three rifle bright fields and details in a play not acted out on stage, but told through dialogues.Prevalue is a sexadecimal number, determines according to the analog value in the standard color monitor internal memory.
3. select suitable adjustment time limit value.
After finishing bus parameter and being provided with parameter will be set is kept in the current accessory channel.And the parameter that will work as prepass be delivered to selected 0～29 in a main channel.
During adjustment, system host passes through I
2C interface transmits initial value: bright field excitation R, and G, the B value, details in a play not acted out on stage, but told through dialogues ends R, G, the B value is controlled white field signal source and is produced bright field or details in a play not acted out on stage, but told through dialogues white signal, receives the measurement result x that color analyzer transmits, y, Y data, and the margin of error of demonstration and standard room.
According to the error between the standard value of bright field measured value and setting, automatically or the chromaticity coordinates and the brightness of manual setting bright field, pass through I
2C interface transmits new bright field excitation R, G, and the B value measures the measurement result x that one group of color analyzer transmits, y, Y data.
After judging that the bright field adjustment is qualified, switch to the details in a play not acted out on stage, but told through dialogues test signal and measure.The same bright field of test adjustment process.
After the measured value of bright field and details in a play not acted out on stage, but told through dialogues is all qualified, show the measurement result of bright field and details in a play not acted out on stage, but told through dialogues, and will adjust qualified bright field excitation R, G, B value and details in a play not acted out on stage, but told through dialogues end R, G, the B value is sent test solution crystal display E
2The PROM storage.
Finishing white balance measures and adjusts.If adjust overstepping the time limit, then finish to adjust, and prompting " overtime ".
Fig. 8 and Fig. 9 have provided design sketch and GAMMA curvature correction and the automatic adjusted design sketch of white balance before the embodiment of the invention LCD GAMMA curvature correction.
Claims (8)
1. LCD GAMMA curve and colour temperature are measured and bearing calibration automatically, and LCD GAMMA curve and colour temperature measure automatically and bearing calibration comprises the following steps:
(1) at first setting up LCD GAMMA curve and colour temperature measures and corrective system automatically, this system comprises system host, detector, color analyzer, video signal source, data-interface and systematic survey and correction software, and system host is equipped with operating system in advance;
(2) the test solution crystal display being inserted LCD GAMMA curve and colour temperature measures and corrective system automatically;
(3) system has the mode of alternative measurement and correction: GAMMA curved measurement and correction, white balance are measured and are adjusted; If select GAMMA curved measurement and correction, change step (4); If select white balance to measure and adjust, change step (5);
(4) GAMMA curved measurement and correction:
A. start-up system GAMMA curved measurement and correction program;
B. communications status self check:
Check system main frame and I
2The communications status of C bus interface board and color analyzer, system works for confirmation is normal;
C., correlation parameter is set:
1. GTG and the variation " step pitch " thereof of selecting measurement and proofreading and correct has 8,16,32,64,128,256 rank available;
2. select the vision signal pattern: AV pattern, VGA pattern are arranged, available;
3. the GAMMA correcting theory curve that meets human eye is set;
D. use linear GAMMA correction coefficient C
(K, I)=I, I=1～256 GTG; K=R, G, B three looks, the GAMMA that upgrades the test solution crystal display shows;
E. the system host control signal changes test signal according to the grey exponent number of setting by " step pitch ", receives color analyzer to the measurement data of each GTG color and carry out computing, obtains the red, green, blue three look output light intensity L of test solution crystal display
(K, I), and actual GAMMA curve send monitor to show;
System host calculates conversion of signals coefficient A by following formula
(K, I):
L
(K，I)＝A
(K，I)C
(K，I)/I (1)
In the formula: I is the input signal of 256 GTGs, I=1～256;
K is the RGB component, K=R, G, B;
L
(K, I)Red, green, blue three look output light intensities for the test solution crystal display;
C
(K, I)Be the data of test solution crystal display RGB component in the GAMMA table of corrections;
F. the GAMMA correcting theory curve that meets human eye according to setting is measured actual GAMMA curve, by formula (1) by the step pitch interpolation calculation, to the RGB redgreenblue calculated signals GAMMA correction coefficient C under each GTG value
(K, I)
G. use new GAMMA correction coefficient C
(K, v)Upgrade the GAMMA table of corrections of test solution crystal display;
H. repeat e., f., g. three processes, with the GAMMA curvature correction of test solution crystal display to the theoretical curve value;
I. the GAMMA calibration result figure that shows by monitor confirms the result to test solution crystal display GAMMA curved measurement and correction;
(5) white balance is measured and is adjusted:
A. the start-up system white balance is measured the adjustment program;
B. select to adjust automatically or artificial the adjustment;
1) the adjustment parameter is set:
1. select to measure passage;
2. select the white balance adjusting process;
3. error is adjusted in white chromaticity coordinates of established standards and permission;
4. white brightness value and allow to adjust error sets up standard;
2) self-adjusting I
2The C parameter is provided with:
1. adjust the memory address of qualified white balance parameter value;
2. preset the RGB initial value of three rifle bright fields and details in a play not acted out on stage, but told through dialogues;
3. white balance parameter numerical value span is set;
4. select to adjust the time limit;
C. system host is controlled white field signal source and is produced bright field or details in a play not acted out on stage, but told through dialogues white signal, and receives the measurement result chromaticity coordinates x that color analyzer transmits, y value, brightness Y numerical value, and the error amount of demonstration and standard white field;
D. according to the error amount that shows, manual or adjust the chromaticity coordinates and the brightness of bright field or details in a play not acted out on stage, but told through dialogues automatically;
E. the error amount of bright field and details in a play not acted out on stage, but told through dialogues all qualified after, finish that white balance is measured and adjust.
2. the LCD GAMMA curve of method formation and colour temperature are measured and corrective system automatically according to claim 1, comprise system host, detector, color analyzer, video signal source, data communication interface and systematic survey and correction software, it is characterized in that:
(1) described system host is Industrial Control Computer or PC;
(2) described detector is the chromaticity detector that has the optical imagery camera lens;
(3) described video signal source comprises video VGA and AV signal source, and wherein vision signal is from video signal source plug-in card or video signal source independently;
(4) described data communication interface comprises: system bus interface, serial communication interface;
(5) described systematic survey and correction software comprise: GAMMA curved measurement and correction software and colour temperature measurement and adjustment software, software loading is on system host.
3. LCD GAMMA curve as claimed in claim 2 and colour temperature are measured and corrective system automatically, and it is characterized in that: described video signal source plug-in card comprises VGA signal source plug-in card and AV signal source plug-in card, in the slot of insertion system main frame.
4. as claim 2 or 3 described LCD GAMMA curves and automatic measurement of colour temperature and corrective system, it is characterized in that: described system host is Industrial Control Computer or the PC that disposes video VGA and AV signal source plug-in card and data communication bus interface card plate, in the slot of signal source plug-in card and data communication bus interface card plate insertion system main frame.
5. as claim 2 or 3 described LCD GAMMA curves and automatic measurement of colour temperature and corrective system, it is characterized in that: the type of test solution crystal display comprises TN (twisted-nematic) type, STN (supertwist is to row) type, the Twisted Nematic of DSTN (double layers super twisted nematic) type, TFT (thin film transistor (TFT)) type thin film transistor.
6. LCD GAMMA curve as claimed in claim 4 and colour temperature are measured and corrective system automatically, it is characterized in that: the type of test solution crystal display comprises TN (twisted-nematic) type, STN (supertwist is to row) type, the Twisted Nematic of DSTN (double layers super twisted nematic) type, TFT (thin film transistor (TFT)) type thin film transistor.
7. as claim 2 or 3 described LCD GAMMA curves and automatic measurement of colour temperature and corrective system, it is characterized in that: the distance L of test solution crystal display and detector is fixed between 0～140mm.
8. LCD GAMMA curve as claimed in claim 5 and colour temperature are measured and corrective system automatically, and it is characterized in that: the distance L of test solution crystal display and detector is fixed between 0～140mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100502013A CN100388348C (en) | 2005-04-08 | 2005-04-08 | Automatic measurement and correction method and system for LCD GAMMA curve and color temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100502013A CN100388348C (en) | 2005-04-08 | 2005-04-08 | Automatic measurement and correction method and system for LCD GAMMA curve and color temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1845232A CN1845232A (en) | 2006-10-11 |
| CN100388348C true CN100388348C (en) | 2008-05-14 |
Family
ID=37064157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100502013A Expired - Fee Related CN100388348C (en) | 2005-04-08 | 2005-04-08 | Automatic measurement and correction method and system for LCD GAMMA curve and color temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100388348C (en) |
Families Citing this family (52)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2441354B (en) * | 2006-08-31 | 2009-07-29 | Cambridge Display Tech Ltd | Display drive systems |
| CN101231830B (en) * | 2007-01-26 | 2010-05-26 | 群康科技(深圳)有限公司 | Method for generating LCD device gamma correction table |
| CN101193318B (en) * | 2007-05-31 | 2010-12-22 | 深圳创维－Rgb电子有限公司 | Automatic adjusting system and its method for LCD TV white balance |
| CN101471044B (en) * | 2007-12-27 | 2011-02-02 | 奇景光电股份有限公司 | Method for accelerated regulation of gamma comparison table |
| CN101471045B (en) * | 2007-12-27 | 2010-10-20 | 奇景光电股份有限公司 | Method for regulating gamma comparison table through gamma curve and color temperature curve |
| CN101583050B (en) * | 2008-05-16 | 2011-01-19 | 中茂电子(深圳)有限公司 | Method and system for rapidly and automatically adjusting color temperature |
| CN101587686B (en) * | 2008-05-23 | 2011-12-14 | 群康科技(深圳)有限公司 | Liquid crystal display (LCD) device and control method thereof |
| CN101667416B (en) * | 2008-09-05 | 2012-08-29 | 深圳Tcl新技术有限公司 | Method for adjusting and analyzing color temperature and GAMMA of display |
| CN101750764B (en) * | 2008-12-02 | 2011-12-14 | 比亚迪股份有限公司 | Gamma curve detection method and system of LCD screen |
| CN101521834B (en) * | 2009-04-02 | 2012-07-04 | 深圳市茁壮网络股份有限公司 | Automatic testing method, device and system |
| CN101860764B (en) | 2009-04-08 | 2012-07-18 | 鸿富锦精密工业（深圳）有限公司 | White balance adjustment method |
| CN101527136B (en) * | 2009-04-23 | 2010-09-29 | 杨德文 | Sectional generating method of display chroma curve |
| CN101668225B (en) * | 2009-09-25 | 2012-09-26 | 深圳创维－Rgb电子有限公司 | Method for adjusting gamma curve to improve image of flat television |
| CN101695112B (en) * | 2009-10-28 | 2011-08-17 | 四川长虹电器股份有限公司 | Method for regulating luminance and contrast ratio of digital televisions |
| CN102111584B (en) * | 2009-12-25 | 2014-09-24 | 康佳集团股份有限公司 | Method and system for setting display parameters of liquid crystal television |
| CN101827277A (en) * | 2010-05-07 | 2010-09-08 | 青岛海信电器股份有限公司 | Method and system for acquiring gamma base color data of liquid crystal display terminal |
| CN101887673B (en) * | 2010-07-21 | 2011-11-30 | 福建捷联电子有限公司 | Method for dynamically predicting color temperatures of liquid crystal display television |
| CN102348126A (en) * | 2010-08-02 | 2012-02-08 | 厦门华侨电子股份有限公司 | Method for realizing automatic adjustment of Gamma curve of television through computer |
| TWI455107B (en) * | 2011-11-07 | 2014-10-01 | Mstar Semiconductor Inc | Method for panel color correction and associated color correction system |
| CN102547372B (en) * | 2011-12-31 | 2014-06-04 | 四川长虹电器股份有限公司 | Method for determining color lookup table parameters of liquid crystal display television and system device therefore |
| CN102761749B (en) * | 2012-07-25 | 2014-04-23 | 四川虹微技术有限公司 | Device for generating gamma correction data table of plasma TV video image |
| CN102761748B (en) * | 2012-07-25 | 2014-04-23 | 四川虹微技术有限公司 | Method for generating gamma correction data table of plasma TV video image |
| TWI507971B (en) * | 2013-04-16 | 2015-11-11 | Wistron Corp | Method and system for adjusting display parameters |
| CN103761934A (en) * | 2014-01-20 | 2014-04-30 | 华映视讯（吴江）有限公司 | Measurement system and method for built-in color style builder |
| CN104064134B (en) * | 2014-05-30 | 2016-07-27 | 深圳市显创光电有限公司 | A kind of display screen effect adjustment method |
| CN104200791A (en) * | 2014-09-24 | 2014-12-10 | 深圳市兆驰股份有限公司 | Fast adaptive white balance correction method |
| DE102014221057A1 (en) * | 2014-10-16 | 2016-04-21 | Continental Automotive Gmbh | Method for operating a display device, arrangement and motor vehicle |
| CN104486609A (en) * | 2015-01-26 | 2015-04-01 | 南京巨鲨显示科技有限公司 | Color temperature and GAMMA curve tuning and measuring integrated machine-by-machine correction flow |
| CN104766574B (en) * | 2015-03-24 | 2019-02-12 | 小米科技有限责任公司 | Color temperature adjusting method and device |
| CN104809974B (en) * | 2015-04-22 | 2017-11-14 | 信利（惠州）智能显示有限公司 | The gamma and correct automatically white balance method and device of a kind of display device |
| CN104751756B (en) * | 2015-04-23 | 2017-12-12 | 京东方科技集团股份有限公司 | Conditioning optics, method and the display device of display panel |
| CN105138185B (en) * | 2015-09-30 | 2019-01-25 | 深圳天珑无线科技有限公司 | Display screen parameter calibrating method and device |
| CN105872511B (en) * | 2016-02-05 | 2017-12-01 | 四川长虹电器股份有限公司 | The method that flat panel TV colour temperature uniformity is improved using a plurality of gamma |
| CN106023942B (en) | 2016-08-01 | 2019-01-18 | 京东方科技集团股份有限公司 | A kind of grayscale color difference adjusting method, device and the display device of display panel |
| CN106357766B (en) * | 2016-09-18 | 2019-04-30 | 河海大学 | A kind of Medical display equipment remotely correcting method based on look-up table Fast Generation |
| WO2018090361A1 (en) * | 2016-11-21 | 2018-05-24 | 弗埃斯工业技术（苏州）有限公司 | Apparatus for testing gamma value of display on laptop |
| CN106657843A (en) * | 2016-12-13 | 2017-05-10 | 四川长虹电器股份有限公司 | Quantitative debugging method for brightness of liquid crystal display television |
| CN106454306A (en) * | 2016-12-19 | 2017-02-22 | 四川长虹电器股份有限公司 | Automatic white balance debugging method at smart TV side |
| CN106710496A (en) * | 2017-01-18 | 2017-05-24 | 深圳市视显光电技术有限公司 | Device and method for online debugging of parameters of LCD logic board |
| CN107039018B (en) * | 2017-05-27 | 2019-04-30 | 深圳市华星光电半导体显示技术有限公司 | Transparent display colour temperature regulating system and transparent display color temperature adjusting method |
| CN107093413B (en) * | 2017-06-29 | 2019-10-15 | 武汉精测电子集团股份有限公司 | A kind of gamma adjusting method of LCD screen |
| CN109994062A (en) * | 2018-01-02 | 2019-07-09 | 深圳市巨烽显示科技有限公司 | A kind of display correction parameter extraction devices, systems, and methods |
| CN110310611A (en) * | 2018-03-20 | 2019-10-08 | 福建华佳彩有限公司 | A kind of algorithm of novel efficient correction Gamma and chromaticity coordinates |
| CN108932936B (en) * | 2018-09-10 | 2020-12-04 | 深圳市华星光电技术有限公司 | Gray scale brightness adjusting method and display device |
| CN109147708B (en) * | 2018-09-30 | 2021-02-26 | 重庆惠科金渝光电科技有限公司 | Gamma value adjusting method and device of display panel and display equipment |
| CN109286803A (en) * | 2018-10-11 | 2019-01-29 | 四川长虹电器股份有限公司 | A kind of method that production line automatically selects TV Gamma |
| CN110827775B (en) * | 2019-09-17 | 2021-08-10 | 广州朗国电子科技有限公司 | Visual display calibration method, device and system for GAMMA (GAMMA ray GAMMA) of all-in-one machine screen |
| CN113270054A (en) * | 2021-05-17 | 2021-08-17 | 京东方科技集团股份有限公司 | Image quality detection of display equipment, image quality detection report generation method and device equipment |
| CN114141212A (en) * | 2021-12-29 | 2022-03-04 | 上海立可芯半导体科技有限公司 | Gamma correction coefficient calculation method for LCD screen of mobile phone |
| CN114333730B (en) * | 2021-12-31 | 2022-10-14 | 东莞市德普特电子有限公司 | Device and method for debugging LCM GAMMA and FLICKER |
| CN115050341B (en) * | 2022-08-15 | 2022-12-09 | 广州朗国电子科技股份有限公司 | Method and device for uniformly adjusting screen color and storage medium |
| CN117253459B (en) * | 2023-11-20 | 2024-01-09 | 汕头市超声仪器研究所股份有限公司 | Gamma adjustment method for liquid crystal display |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184952A (en) * | 1996-10-31 | 1998-06-17 | 索尼公司 | Image projecting apparatus and the method of adjustment |
| US6281944B1 (en) * | 1997-08-25 | 2001-08-28 | Lg Electronics Inc. | Apparatus and method for correcting non-linear characteristics in display device |
| JP2002123232A (en) * | 2000-06-28 | 2002-04-26 | Lg Philips Lcd Co Ltd | Device and method for correcting gamma voltage and video data of liquid crystal display device |
| CN1499472A (en) * | 2002-11-05 | 2004-05-26 | 奇景光电股份有限公司 | Gamma correcting device for liquid crystal display and LCD for device |
| CN1538305A (en) * | 2003-04-18 | 2004-10-20 | 瑞轩科技股份有限公司 | Device and method for automatic regalating temp of display colour |
-
2005
- 2005-04-08 CN CNB2005100502013A patent/CN100388348C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184952A (en) * | 1996-10-31 | 1998-06-17 | 索尼公司 | Image projecting apparatus and the method of adjustment |
| US6281944B1 (en) * | 1997-08-25 | 2001-08-28 | Lg Electronics Inc. | Apparatus and method for correcting non-linear characteristics in display device |
| JP2002123232A (en) * | 2000-06-28 | 2002-04-26 | Lg Philips Lcd Co Ltd | Device and method for correcting gamma voltage and video data of liquid crystal display device |
| CN1499472A (en) * | 2002-11-05 | 2004-05-26 | 奇景光电股份有限公司 | Gamma correcting device for liquid crystal display and LCD for device |
| CN1538305A (en) * | 2003-04-18 | 2004-10-20 | 瑞轩科技股份有限公司 | Device and method for automatic regalating temp of display colour |
Non-Patent Citations (4)
| Title |
|---|
| 2849白平衡仪I2C总线自动调整系统的设计. 姚军，徐蔚，刘家俊，毕如道.计量技术，第12期. 2000 |
| 2849白平衡仪I2C总线自动调整系统的设计. 姚军，徐蔚，刘家俊，毕如道.计量技术，第12期. 2000 * |
| 高清晰度电视白平衡自动调整系统的研究. 姚军.电视技术，第8期. 2002 |
| 高清晰度电视白平衡自动调整系统的研究. 姚军.电视技术，第8期. 2002 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1845232A (en) | 2006-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100388348C (en) | Automatic measurement and correction method and system for LCD GAMMA curve and color temperature | |
| CN103067743B (en) | System and method of quick adjustment of liquid crystal display television | |
| US8106866B2 (en) | Method for establishing gamma correction table for liquid crystal display | |
| US7932917B2 (en) | Method of controlling picture quality in flat panel display for compensating brightness of a display stain of indeterminate shape | |
| EP3340227B1 (en) | Display apparatus and method for driving the same | |
| CN100420982C (en) | Flat display apparatus and picture quality controlling method thereof | |
| US7746364B2 (en) | Brightness correction method and system utilizing the same | |
| CN102231016B (en) | Method, device and system for compensating brightness of liquid crystal module | |
| US8610781B2 (en) | System and method for light compensation in a video panel display | |
| CN105259687A (en) | Liquid crystal display screen picture consistency adjusting method and system | |
| CN102203847A (en) | Method for controlling power of image display light emission device, image display light emission device, display device, and television reception device | |
| CN103559866B (en) | A kind of image display control method and device | |
| CN101521779A (en) | Display device and method for regulating color tone or hue | |
| CN109410839B (en) | Correction optimization method and device for display screen, electronic equipment and storage medium | |
| CN101471045A (en) | Method for regulating gamma comparison table through gamma curve and color temperature curve | |
| CN101697271A (en) | Direct-type LED backlight color uniformity correction system and direct-type LED backlight color uniformity correction method | |
| CN100529914C (en) | LCD apparatus with uniform LC layer | |
| CN110992913A (en) | Color supplement correction method for liquid crystal display screen | |
| CN114170941B (en) | Display brightness matching method and display | |
| US11341876B2 (en) | White balance adjusting system for display device and adjusting method thereof | |
| US11200858B1 (en) | Color-calibration system and color-calibration method of display panel | |
| CN110428787B (en) | System and method for establishing overdrive lookup table | |
| CN1723699A (en) | Projection system with contrast homogeneity correction | |
| CN100426059C (en) | Liquid-crystal display panel | |
| JP2002149135A (en) | Transmission type image display device, and device and method for adjustment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20110408 |