CN108333801B - System and method for collecting chromatic value of liquid crystal module - Google Patents
System and method for collecting chromatic value of liquid crystal module Download PDFInfo
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- CN108333801B CN108333801B CN201810035754.9A CN201810035754A CN108333801B CN 108333801 B CN108333801 B CN 108333801B CN 201810035754 A CN201810035754 A CN 201810035754A CN 108333801 B CN108333801 B CN 108333801B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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 invention discloses a system and a method for collecting chromatic values of a liquid crystal module, wherein the system comprises a plurality of self-correcting colorimeters arranged in a production line working area of a display and a spectrometer arranged in a sample monitoring area of the display; the self-correcting colorimeter is used for self-correcting chromatic values according to the spectral radiation curve and the correction parameters transmitted by the PC, and after the self-correction is completed, the spectral data corresponding to the display on the assembly line station are collected and transmitted to the PC; the spectrometer is used for acquiring a spectral radiation curve of a display in a display sample monitoring area; and the PC is used for calculating the correction parameters of each self-correcting colorimeter and then receiving the spectral data, collected by the self-correcting colorimeters after self-correction, of the corresponding displays on the assembly line stations. The invention improves the large-scale array application of the colorimeter in a low-cost mode, meets the requirements of the production line on various aspects of speed, precision and cost, and is very suitable for industrial large-scale production.
Description
Technical Field
The invention relates to the technical field of liquid crystal module chromaticity correction, in particular to a system and a method for collecting chromaticity values of a liquid crystal module.
Background
The liquid crystal module generation factory corrects the chromatic value of the display module through the spectrometer or the colorimeter, the spectrometer colorimeter generally has the advantages of low speed and high precision, and the tristimulus value colorimeter has the advantages of high speed and low cost, but the precision of the tristimulus value colorimeter is poorer than that of a spectrograph. Due to the process difference among the filter plates, individual precision difference generally exists in the tristimulus value colorimeter. In the actual use process, different screens need to be corrected, and correction parameters of respective types of screens are generated, for example, ca310 includes 99 channels, and each channel can store parameters of one type of screen. On the display assembly line, the colorimeter on each station all needs to carry out parameter correction to the display that is producing, and is time-consuming and laborious.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a liquid crystal module colorimetric value acquisition system and a colorimetric value acquisition method, which improve the large-scale array application of colorimeters in a low-cost mode, meet the requirements of the production line on multiple aspects of speed, precision and cost, and are very suitable for industrial large-scale production.
In order to achieve the aim, the system for acquiring the chromatic value of the liquid crystal module is characterized by comprising a plurality of self-calibration colorimeters arranged in a production line working area of a display and a spectrometer arranged in a sample monitoring area of the display, wherein the spectrometer and each self-calibration colorimeter are connected with a PC (personal computer) through a communication data bus;
the self-correcting colorimeter is used for fitting a fitted spectral radiation curve MS according to a spectral radiation curve M transmitted by a PC, acquiring and outputting an original tristimulus value S and sending the original tristimulus value S to the PC, carrying out colorimetric value self-correction on a correction parameter C returned by the PC, acquiring a corrected tristimulus value corresponding to a display on a production line station after the self-correction is finished and transmitting the corrected tristimulus value to the PC;
the spectrometer is used for collecting a spectral radiation curve M of a display in a display sample monitoring area and transmitting the spectral radiation curve M to the PC;
and the PC is used for sending the spectral radiation curve M collected by the spectrometer to all the self-correcting colorimeters in the production line working area of the display, calculating the correction parameter C of each self-correcting colorimeter, and then receiving the corrected tristimulus values DS of the display corresponding to the production line station collected by the self-correcting colorimeter after self-correction is finished.
Further, the formula colorimeter of autotuning includes colorimeter, orthotic devices and camera lens, the colorimeter all is connected with the PC with orthotic devices, the camera lens receives the spectral data that corresponds the display on the assembly line station to transmit to the colorimeter through optic fibre, orthotic devices is used for sending corresponding light radiation according to the spectral radiation curve that PC transmitted, the colorimeter is used for gathering the light source that orthotic devices launched, exports the chromatic value to PC to correct according to the correction parameter that PC transmitted, gathers the spectral data that corresponds the display on the assembly line station again after the correction is accomplished and transmits to PC.
Furthermore, the correcting device comprises a communication interface, an MCU, a constant current source array, an LED array driver and an LED light source: the communication interface is used for communicating with a PC (personal computer) and receiving spectral parameters; the MCU is used for controlling current output of each path in the constant current source array; the constant current source array is used for respectively outputting current to each path in the LED array drive according to the control of the MCU; the LED array driver is used for driving the LED light source to emit light according to the current output by the constant current source array; the LED light source is used for emitting light radiation.
Furthermore, the constant current source array and the LED array driver are provided with 20 branches, the LED light sources are 20 LED lamps with different main wavelengths, and the spectral wavelength range of the LED lamps is 400nm-780 nm.
Further, the spectral wavelengths of the 20 LED lamps are uniformly spaced in steps of 20 nm.
Further, the self-calibration colorimeter (1) has 99 channels.
A method based on the system for collecting chromatic values of the liquid crystal modules is characterized by comprising the following steps:
1) the spectrometer collects a spectral radiation curve M of a display in a display sample monitoring area and transmits the spectral radiation curve M to the PC, and the PC sends the spectral radiation curve M to all self-correcting colorimeters in a display assembly line working area;
2) the self-calibration colorimeter fits a fitted spectral radiation curve MS according to a spectral radiation curve M transmitted by a PC, measures an original tristimulus value S and transmits the measured original tristimulus value S to the PC, and the PC calculates a correction parameter C according to the original tristimulus value S of each self-calibration colorimeter and transmits the correction parameter C to the corresponding self-calibration colorimeter;
3) each self-correcting colorimeter corrects the original tristimulus values S according to the correction parameters C transmitted by the PC, acquires corrected tristimulus values DS corresponding to the display on the assembly line station after self-correction is completed and transmits the corrected tristimulus values DS to the PC;
4) and the PC records the spectral data of the display corresponding to each self-correcting colorimeter on the station of the production line.
Preferably, the spectral radiation curve MS fitted in step 2) is obtained by fitting an array composed of LED lamps with different dominant wavelengths, and the fitting method is: and MS is N x LK, and LK is M/N, wherein LK is a proportionality coefficient related to the luminous intensity, M is a three-primary-color spectral radiation curve of the display module, and N is a spectral luminous array matrix formed by the LED lamp rated brightness (simultaneously recording the current driving parameter I array under the brightness).
Preferably, the method for calculating the correction parameter in step 2) is C ═ DE/S, where C is the correction parameter, DE is the tristimulus value calculated according to the three primary color spectral parameters of the display module, and S is the original tristimulus value output by the colorimeter to be corrected.
Preferably, the colorimeter to be corrected in the step 3) performs correction by using DS ═ S × C, where DS is a corrected tristimulus value.
The invention has the advantages that:
1) the correction work of a single colorimeter is completed rapidly: the novel colorimeter correction device utilizes the spectrum adjustable light source, can rapidly reproduce the shape of the spectrum curve of various characteristic screens, and meets the correction work of the colorimeter. The single device can simulate the spectral characteristics of various displays and finish the adjustment work of a single colorimeter in a short time. The factory efficiency and the regular correction efficiency of the colorimeter are improved.
2) Providing gamut simulation and traversal of existing devices and theoretical devices: the system can simulate the collected module and actual color gamut traversal and simulation work of the module which is to be designed but has no real object, and provides a display module spectrum sample for a module manufacturer.
3) Possess the precision advantage that traditional tristimulus value sensor did not possess, possess the speed advantage that the spectrum appearance did not possess simultaneously, can avoid the flat cost of expense that expensive equipment updates and bring for the product through the current assembly line body of reforming transform existing tristimulus value colorimeter simultaneously, have high cost-to-effect ratio.
4) The method provides an upgrading scheme for old tristimulus-value colorimeters with slightly low factory precision, avoids increasing factory expenditure due to direct updating, and saves equipment cost.
Drawings
Fig. 1 is a schematic structural diagram of a novel colorimeter correction system of the present invention.
Fig. 2 is a schematic structural view of a novel colorimeter correction device of the present invention.
In the figure: the system comprises a display assembly line working area A, a display a corresponding to an assembly line station, a display B, a self-calibration colorimeter 1, a spectrometer 2, a PC3, a colorimeter 1-1, a correction device 1-2, a lens 1-3, a communication interface 1-21, an MCU1-22, a constant current source array 1-23, an LED array driver 1-24 and an LED light source 1-25 in a display sample monitoring area B.
Detailed Description
The invention is described in further detail below with reference to the following figures and examples, which should not be construed as limiting the invention.
As shown in fig. 1, the present invention provides a system for collecting chromatic values of a liquid crystal module, which includes a plurality of self-calibration colorimeters 1 disposed in a display pipeline working area a and a spectrometer 2 disposed in a display sample monitoring area B, wherein the spectrometer 2 and each self-calibration colorimeter 1 are connected to a PC3 through a communication data bus.
The self-calibration colorimeter 1 is used for self-calibrating the colorimetric values according to the spectral radiation curves and the correction parameters transmitted by the PC3, acquiring spectral data corresponding to the display a on the assembly line station after self-calibration is completed, and transmitting the spectral data to the PC 3. The spectrometer 2 is used to collect the spectral radiance curve of the display B in the display sample monitoring area B and transmit it to the PC 3. The PC3 is used for sending the spectral radiation curve that spectrum appearance 2 gathered to all the formula colorimeters 1 of display assembly line work area A of proofreading, and calculate the correction parameter of every formula colorimeter 1 of proofreading, and the spectral data that corresponds display a on the assembly line station that receives the formula colorimeter 1 after the proofreading is accomplished and gathers again.
As shown in fig. 2, the self-calibration colorimeter 1 comprises a colorimeter 1-1, a correction device 1-2 and a lens 1-3, wherein the colorimeter 1-1 and the correction device 1-2 are both connected with a PC3, the lens 1-3 receives spectral data of a display a corresponding to a production line station and transmits the spectral data to the colorimeter 1-1 through an optical fiber, the correction device 1-2 is used for emitting corresponding optical radiation according to a spectral radiation curve transmitted by a PC3, the colorimeter 1-1 is used for collecting a light source emitted by the correction device 1-2, outputs a colorimetric value to the PC3 and corrects the colorimetric value according to correction parameters transmitted by the PC3, and then collects the spectral data of the display a corresponding to the production line station after correction is completed and transmits the spectral data to the PC 3.
The correcting device 1-2 comprises communication interfaces 1-21, MCUs 1-22, constant current source arrays 1-23, LED array drivers 1-24 and LED light sources 1-25: the communication interfaces 1-21 are used for communicating with the PC3 and receiving spectral parameters; the MCU1-22 is used for controlling the voltage output of each path in the constant current source arrays 1-23; the constant current source arrays 1-23 are used for respectively outputting voltage to each path of the LED array drivers 1-24 according to the control of the MCUs 1-22; the LED array driver 1-24 is used for driving the LED light source 1-25 to emit light according to the voltage output by the constant current source array 1-23; the LED light sources 1-25 are used to emit light radiation. The constant current source array 1-23 and the LED array driver 1-24 have 20 branches, and the LED light source 1-25 has 20 branches.
The method for collecting the chromaticity by using the system for collecting the chromaticity value of the liquid crystal module comprises the following steps:
1) the spectrometer 3 collects a spectral radiation curve of a display B in a display sample monitoring area B and transmits the spectral radiation curve to the PC3, and the PC3 sends the spectral radiation curve to all self-correcting colorimeters 1 in a display assembly line working area A;
21) the communication interface 1-21 of the correction device 1-2 in the self-correcting colorimeter 1 receives the spectral radiation curve;
22) the MCU1-22 converts the spectrum to be simulated into corresponding current through data processing and table lookup, and controls the constant current source array 1-23 to control the LED array driver 1-24 to drive the LED light source 1-25 to emit light according to the current of each path;
23) the colorimeter 1-1 collects the light source emitted by the correcting device 1-2 and outputs the original tristimulus values to the PC 3;
24) the PC3 compares the original tristimulus values fed back by each self-calibration colorimeter 1 with the tristimulus values calculated by the spectral radiation curve, calculates the correction parameters of each self-calibration colorimeter 1 and transmits the correction parameters to the corresponding self-calibration colorimeter 1;
3) each self-calibration colorimeter 1 carries out calibration according to the calibration parameters transmitted by the PC3, and after the self-calibration is finished, spectral data corresponding to the display a on the assembly line station are collected and transmitted to the PC 3;
4) the PC3 records the spectral data for each self-calibrating colorimeter 1 for display a at the in-line station.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make various changes and modifications within the spirit and scope of the present invention without departing from the spirit and scope of the appended claims.
Claims (9)
1. The utility model provides a liquid crystal module chromatic value collection system which characterized in that: the system comprises a plurality of self-calibration colorimeters (1) arranged in a display assembly line working area (A) and spectrometers (2) arranged in a display sample monitoring area (B), wherein the spectrometers (2) and each self-calibration colorimeter (1) are connected with a PC (3) through a communication data bus;
the self-correcting colorimeter (1) is used for fitting a fitted spectral radiation curve MS according to a spectral radiation curve M transmitted by the PC (3), collecting and outputting an original tristimulus value S and sending the original tristimulus value S to the PC (3), performing chromatic value self-correction on a correction parameter C returned by the PC (3), collecting a corrected tristimulus value corresponding to the display (a) on a production line station after the self-correction is completed, and transmitting the corrected tristimulus value to the PC (3); the method for fitting the spectral radiance curve comprises the following steps: MS = N × LK, LK = M/N, wherein LK is a proportionality coefficient related to luminous intensity, M is a three-primary-color spectral radiation curve of the display module, and N is a spectral luminous array matrix formed when the LED lamp is rated in brightness; the calculation method of the correction parameter C is C = DE/S, DE is a tristimulus value calculated according to the three primary color spectral parameters of the display module, and S is an original tristimulus value output by the colorimeter to be corrected;
the spectrometer (2) is used for collecting a spectral radiation curve M of a display (B) in a display sample monitoring area (B) and transmitting the spectral radiation curve M to the PC (3);
the PC (3) is used for sending the spectral radiation curve M collected by the spectrometer (2) to all the self-correcting colorimeters (1) in the working area (A) of the display assembly line, calculating a correction parameter C of each self-correcting colorimeter (1), and then receiving a corrected tristimulus value DS corresponding to the display (a) on an assembly line station collected by the self-correcting colorimeter (1) after self-correction is completed; the self-correcting colorimeter (1) comprises a colorimeter (1-1), a correcting device (1-2) and a lens (1-3),
the colorimeter (1-1) and the correcting device (1-2) are connected with the PC (3), the lens (1-3) receives spectral data corresponding to the display (a) on the assembly line station and transmits the spectral data to the colorimeter (1-1) through optical fibers, the correcting device (1-2) is used for emitting corresponding optical radiation according to a spectral radiation curve transmitted by the PC (3), the colorimeter (1-1) is used for collecting a light source emitted by the correcting device (1-2), outputting a chromatic value to the PC (3) and correcting according to correction parameters transmitted by the PC (3), and after correction is completed, spectral data corresponding to the display (a) on the assembly line station are collected and transmitted to the PC (3).
2. The system for collecting chromatic values of liquid crystal modules of claim 1, wherein: the correcting device (1-2) comprises a communication interface (1-21), an MCU (1-22), a constant current source array (1-23), an LED array driver (1-24) and an LED light source (1-25): the communication interface (1-21) is used for communicating with the PC (3) and receiving the spectral parameters; the MCU (1-22) is used for controlling voltage output of each path in the constant current source array (1-23); the constant current source arrays (1-23) are used for respectively outputting voltage to each path of the LED array drivers (1-24) according to the control of the MCU (1-22); the LED array driver (1-24) is used for driving the LED light source (1-25) to emit light according to the voltage output by the constant current source array (1-23); the LED light sources (1-25) are used for emitting light radiation.
3. The system for collecting chromatic values of liquid crystal modules of claim 2, wherein: the constant current source array (1-23) and the LED array driver (1-24) are provided with 20 branches, the LED light sources (1-25) are 20 LED lamps with different main wavelengths, and the spectral wavelength range of the LED lamps is 400nm-780 nm.
4. The system for collecting chromatic values of liquid crystal modules of claim 3, wherein: the spectral wavelengths of the 20 LED lamps are arranged at regular intervals in 20nm steps.
5. The system for collecting chromatic values of liquid crystal modules of claim 1, wherein: the self-calibration colorimeter (1) has 99 channels.
6. The method for collecting chromatic values of liquid crystal modules according to any one of claims 1 to 5, wherein the method comprises the following steps: the method comprises the following steps:
1) the spectrometer (3) collects a spectral radiation curve M of a display (B) in a display sample monitoring area (B) and transmits the spectral radiation curve M to the PC (3), and the PC (3) sends the spectral radiation curve M to all self-correcting colorimeters (1) in a display assembly line working area (A);
2) the self-correcting colorimeter (1) fits a fitted spectral radiation curve MS according to a spectral radiation curve M transmitted by the PC (3), an original tristimulus value S is measured and transmitted to the PC (3), and the PC (3) calculates a correction parameter C according to the original tristimulus value S of each self-correcting colorimeter (1) and transmits the correction parameter C to the corresponding self-correcting colorimeter (1);
3) each self-correcting colorimeter (1) corrects an original tristimulus value S according to a correction parameter C transmitted by the PC (3), acquires a corrected tristimulus value DS corresponding to the display (a) on a production line station after self-correction is completed, and transmits the corrected tristimulus value DS to the PC (3);
4) and the PC (3) records the spectral data of each self-calibration colorimeter (1) corresponding to the display (a) on the assembly line station.
7. The method for collecting chromatic values of liquid crystal modules of claim 6, wherein: the spectral radiation curve MS fitted in the step 2) is obtained by fitting an array composed of LED lamps with different main wavelengths, and the fitting method comprises the following steps: MS = N × LK, LK = M/N, wherein LK is a proportionality coefficient related to luminous intensity, M is a three primary colors spectral radiation curve of the display module, and N is a spectral luminous array matrix formed when the LED lamp is rated in brightness.
8. The method for collecting chromatic values of liquid crystal modules of claim 6, wherein: the calculation method of the correction parameters in the step 2) is C = DE/S, wherein C is the correction parameters, DE is the tristimulus values calculated according to the three primary color spectral parameters of the display module, and S is the original tristimulus values output by the colorimeter to be corrected.
9. The method for collecting chromatic values of liquid crystal modules of claim 6, wherein: the method for correcting the colorimeter to be corrected in the step 3) is DS = S × C, wherein DS is a corrected tristimulus value.
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| CN106328070A (en) * | 2016-09-28 | 2017-01-11 | 武汉精测电子技术股份有限公司 | OLED module Gamma adjustment and calibration method and device |
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