CN1845232A - 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
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Abstract
The invention provides a GAMMA curvature correction and color-temperature automatic regulating method for liquid crystal display and the system. The said system consists of a system host-machine, a detector, a color analyzer, a video standard signal source, a data interface,and a system measure and correction software, which can perform GAMMA curvature correction and white balance adjustment for multi-purpose TV and computer display including LCD and high-resolution back projection and multi-structure liquid crystal display including TN, STN, DSTN and TFT to improve the videograph display quality of the liquid crystal display. The system host-machine connects multiple video signal sources, automatic measurement and correction software for GAMMA curvature and color-temperature and data interface together, the system parameter can be set manually or automatically, the system configuration is simple, GAMMA curvature correction and white balance adjustment software can be conveniently transferred, and can rapidly finish automatic measurement and correction for GAMMA curvature and color-temperature and can visually inspect the effect. The invention can be used in departments including scientific research, production, quality inspection and maintenance and can visually finish the GAMMA curvature correction and white balance adjustment for the LCD products with high accuracy and quick-speed.
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:
The automatic measurement of LCD GAMMA curve and colour temperature and bearing calibration and system, 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 measurement and correction, white balance are measured and are adjusted;
(4) GAMMA curved measurement and correction:
A. start-up system GAMMA curved measurement and correction program;
B., 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. set GAMMA calibration standard curve;
C. 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;
D. use linear GAMMA correction data 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. according to the standard GAMMA curve of setting, press the step pitch interpolation calculation by formula 1, 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 typical 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. white chromaticity coordinates of established standards and permissible error;
4. white brightness value and permissible error set up standard;
2) self-adjusting I
2The C parameter is provided with:
1. memory address;
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. span;
4. 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 x that color analyzer transmits, y, Y data, 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 can be independently signal source or 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: the vision signal plug-in card of described system configuration 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. the automatic measurement of LCD GAMMA curve and colour temperature and bearing calibration and system, 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 measurement and correction, white balance are measured and are adjusted;
(4) GAMMA curved measurement and correction:
A. start-up system GAMMA curved measurement and correction program;
B., 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. set GAMMA calibration standard curve;
C. 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;
D. use linear GAMMA correction data 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. according to the standard GAMMA curve of setting, press the step pitch interpolation calculation by formula 1, to the RGB redgreenblue calculated signals GAMMA correction coefficient C under each GTG value
(K, I)
G. use new GAMMA correction data 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 typical 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. white coordinate of established standards and permissible error;
4. white brightness value and permissible error set up standard;
2) self-adjusting I
2The C parameter is provided with:
1. memory address;
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. span;
4. 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 x that color analyzer transmits, y, Y data, 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 and 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, can be signal source plug-in card or 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: the vision signal plug-in card of described system configuration comprises VGA signal plug-in card and AV signal 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 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. LCD GAMMA curve as claimed in claim 4 and colour temperature are measured and corrective system automatically, it is characterized in that: 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.
6. as claim 2 or 3 or 5 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.
7. LCD GAMMA curve as claimed in claim 6 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.
8. as claim 2 or 3 or 5 or 7 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.
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CN117253459A (en) * | 2023-11-20 | 2023-12-19 | 汕头市超声仪器研究所股份有限公司 | Gamma adjustment method for liquid crystal display |
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