CN101089945B - Optical color parameter correction method and device of plane display - Google Patents

Abstract

A method and device for correcting light and color parameters of a flat-panel display, using a single-point calibration method to measure the flat-panel display in advance to obtain correction parameters for each pixel and storing them in a correction parameter storage device, and using a DVI receiver to receive video signal source data And decode it, extract the three primary color data of each pixel, complete the synchronization processing of clock recovery and data, and perform calculation and processing on the correction parameters of each pixel and the three primary color data of each pixel after decoding in the correction operation device, To adjust the light and color parameters of each component pixel of the flat panel display to ensure that the flat panel display reproduces the best image. The invention does not change the digital signal transmission protocol, and is compatible with the DVI digital video interface input of the flat panel display. The flat panel display with digital video interface can directly receive and display the converted image signal data from the digital video interface, and has the advantages of good compatibility, easy operation, and convenient upgrade.

Description

A method and device for correcting light and color parameters of a flat panel display

technical field

The invention relates to a method and device for correcting light and color parameters of a flat panel display, in particular to a method and device for correcting light and color parameters of a flat panel display based on a computer standard video digital interface.

Background technique

In recent years, with the development of flat-panel display technology and image display technology, display devices tend to be large-area, digital, and high-definition, so the requirements for uniformity and other indicators of flat-panel displays are getting higher and higher. Existing display devices are especially large-area flat-panel displays composed of discrete light-emitting pixel units (groups). Due to the discreteness of the discrete light-emitting pixel units (groups), and the huge number of light-emitting pixel units (groups), each of the same flat-panel display The light-color parameters of the light-emitting pixel unit (group) have a large dispersion; it causes uneven brightness and chromaticity of the flat-panel display, making the flat-panel display poor in consistency, seriously affecting the image display quality of the display, and becoming a bottleneck restricting the development of large-screen flat-panel displays. For various types of flat-panel displays, especially flat-panel displays composed of discrete light-emitting pixels, there are also differences in physical properties or light and color of the light-emitting devices or display components during production, and some flat-panel displays have attenuation characteristics, which increase with the use cycle. The range of inconsistencies in light and color parameters is more obvious. There are differences in individual parameters of light-emitting pixels such as brightness, chromaticity, color temperature, and color saturation, which also increase the inconsistency between the image displayed on the flat panel display and the original image.

As shown in Figure 1, the existing digital flat panel display adopts the DVI (Digital Visual Interface) standard to directly receive the digital video signal output by the computer standard digital video interface through the DVI receiver as image display data. Due to the differences in the individual parameters of the light-emitting pixels of flat-panel displays, such as brightness, chromaticity, color temperature, and color saturation, the brightness, chromaticity, color temperature, and color saturation displayed by each light-emitting pixel of the flat-panel display are the same as the digital video signals output by the standard digital video interface of the computer. Inconsistencies occur so that flat panel displays cannot reproduce the original image well.

Contents of the invention

The problem to be solved by the present invention is to provide a method for correcting light and color parameters of a flat panel display. The single point calibration method is used to measure the flat panel display in advance to obtain the correction parameters of each pixel, and the correction parameters of each pixel are connected to the standard digital video interface of the computer. The output image display data is calculated and processed to adjust the light and color parameters of each component pixel of the flat panel display, so that the uniformity of the flat panel display is good, and the flat panel display can reproduce the best image; in order to realize the correction of the light and color parameters of the above flat panel display method, and the present invention also provides a device for correcting light and color parameters of a flat panel display.

In order to solve the above-mentioned technical problems, the flat panel display light color parameter correction method of the present invention adopts the following steps:

Pre-measure each pixel of the flat panel display, obtain the light and color correction parameters of each pixel and load them into the storage device;

Decode the video signal source data from the computer, extract the red (R), green (G) and blue (B) three primary color image data of each pixel, and complete the clock recovery and data synchronization processing;

Perform digital operations and processing on the decoded red (R), green (G) and blue (B) primary color data of each pixel and the light color correction parameters of each pixel to obtain the fitted red (R) data of each pixel. , green (G), blue (B) three primary color data;

Restore the red (R), green (G) and blue (B) primary color data of each pixel after fitting into the same format as the video signal source data, and send it to the flat panel display.

For realizing above-mentioned method, flat panel display light color parameter correcting device of the present invention comprises DVI receiver 4, image channel 5, correction operation device 6, DVI sender 7, correction parameter storage device 8; One end of DVI receiver 4 and computer 1 Connect, receive the DVI video signal source data output by computer 1 and decode it, extract the red (R), green (G), blue (B) three primary color data of each pixel, and complete the synchronous processing of clock recovery and data; The other end of the DVI receiver 4 is connected to the correction operation device 6 through the image channel 5, and the red (R), green (G) and blue (B) three primary color data of each pixel after decoding are transmitted to the correction operation device through the image channel 5 6; one end of the correction parameter storage device 8 is connected with the correction computing device 6, and the correction parameter is transmitted to the correction computing device 6, and each pixel red (R), green (G), blue (B) after decoding is decoded by the correction computing device 6 ) three primary color data and the correction parameter data are calculated and processed, output the red (R), green (G), blue (B) three primary color data after fitting; the other end of correction operation device 6 is connected with DVI transmitter 7, The fitted red (R), green (G) and blue (B) primary color data are restored by the DVI transmitter 7 into the same format as the video signal source data and sent to the flat panel display 3 .

In order to make the light and color parameters of each display unit of the flat panel display consistent throughout the life cycle, the light and color parameters of each pixel of the flat panel display can be calibrated periodically.

The present invention uses the DVI receiver to receive the digital video signal output by the computer standard digital video interface DVI (Digital Visual Interface) and decodes it, performs arithmetic processing on the correction parameters of each pixel and the original image data after decoding, and then utilizes the DVI transmitter The fitted image signal is restored to the same format as the video signal source data, and sent to the flat-panel display to achieve the purpose of correcting the light and color parameters of the flat-panel display. For the flat panel display whose input interface is DVI digital video interface input, the method is equivalent to transparent transmission, does not change the digital signal transmission protocol, and is compatible with the flat panel display DVI digital video interface input.

The device of the present invention is a digital signal transmission and display system that uses the DVI standard to connect the video signal source and the flat panel display device, and the flat panel display with a digital video interface (DVI) can directly receive and display the transformed video from the digital video interface. Image signal data, the device does not change the original video data transmission mode, interface standard and flat panel display; it has the advantages of good compatibility, easy operation, and convenient upgrade.

Description of drawings:

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram of the connection between a DVI standard video signal source and a digital flat panel display in the prior art.

Fig. 2 is a schematic structural diagram of a device for correcting light and color parameters of a flat panel display according to the present invention.

3 is a schematic structural diagram of a correction device for light and color parameters of a flat panel display according to Embodiment 1 of the present invention.

4 is a schematic structural diagram of a correction device for light and color parameters of a flat panel display according to Embodiment 2 of the present invention.

5 is a schematic structural diagram of a light color parameter correction device for a flat panel display that realizes image scaling of an LED display screen according to Embodiment 4 of the present invention.

6 is a schematic structural diagram of a flat panel display light color parameter correction device for realizing virtual display of an LED display according to Embodiment 5 of the present invention.

FIG. 7 is a schematic structural diagram of a light color parameter correction device for a flat-panel display that realizes setting the gamma value of an LED display according to Embodiment 6 of the present invention.

Detailed ways

As shown in Figure 1, it is a schematic diagram of the connection between the DVI standard video signal source and the digital flat panel display 3 in the prior art, the display device end DVI receiver 4 of the flat panel display 3 is directly connected with the DVI transmitter 7 of the computer 1 through the DVI cable 2, and receives DVI standard video signal output by computer 1. Since there is no light and color parameter correction device, there will be differences between the image displayed on the flat panel display 3 and the video image output by the computer 1, and the consistency is poor.

As shown in FIG. 2 , it is a structural schematic diagram of a correction device for light and color parameters of the flat panel display 3 of the present invention. The correcting device of flat panel display 3 light color parameters of the present invention comprises DVI receiver 4, image channel 5, correcting operation device 6, DVI sender 7, correcting parameter storage device 8; One end of DVI receiver 4 is connected with computer 1, receives The DVI video signal source data output by the computer 1 is decoded, and the three primary color data of red (R), green (G) and blue (B) are extracted for each pixel, and the synchronization processing of clock recovery and data is completed; the DVI receiver The other end of 4 is connected with the correction operation device 6 through the image channel 5, and the red (R), green (G), blue (B) three primary color data of each pixel after decoding are transmitted to the correction operation device 6 through the image channel 5; One end of the parameter storage device 8 is connected with the correction operation device 6, and the correction parameters are transmitted to the correction operation device 6, and the red (R), green (G), blue (B) three primary color data and Calibrate parameter data for calculation and processing, and output the fitted red (R), green (G), blue (B) three primary color data; the fitted red (R), green (G), blue (B) three primary color data The primary color data is restored to the same format as the video signal source data by the DVI transmitter 7 and sent to the flat panel display 3 .

Different flat panel displays 3 have different light and color parameters for each pixel, and the light and color correction parameter tables for normalization processing are different. The other end of the correction parameter storage device 8 has five connection methods: a, the communication port with the computer 1 is RS232 serial port or parallel port connection, the correction parameters are sent to the correction parameter storage device 8 through the communication port of the computer 1, that is, the RS232 serial port or parallel port; b, connected with the USB port of the computer 1, and the correction parameters are sent to the correction parameter storage device through the USB port of the computer 1 8; c, connected with the U disk, the correction parameter storage device 8 reads the correction parameters from the U disk; d, connected with the DVI receiver 4, the correction parameters can be added to the DVI standard signal, and sent to the correction parameter storage device 8 according to the protocol Middle; e, be connected with EEPROM memory 9, the other end of EEPROM memory 9 is connected with computer 1 communication port, i.e. RS232 serial port or parallel port, computer 1's USB port or U disk, and the correction parameter is through computer 1 communication port, i.e. RS232 serial port or parallel port, The USB port of the computer 1 or the U disk is stored in the EEPROM memory 9 , and the correction parameter storage device 8 reads the correction parameters from the EEPROM memory 9 .

Using the device of the present invention can load different light color correction parameter tables for different flat panel displays 3 without changing the device of the present invention, which is equivalent to a transparent device for users.

Embodiment one

The first embodiment is a device for correcting brightness and chromaticity parameters of an LED display screen. As shown in FIG. 3 , the correction parameter storage device 8 uses a light color correction parameter buffer 10 . One end of DVI receiver 4 is connected with computer 1, receives the DVI video signal source data that computer 1 outputs and decodes it, extracts red (R), green (G), blue (B) three primary color data of each pixel, Complete the synchronous processing of clock recovery and data; the other end of the DVI receiver 4 is connected with the correction operation device 6 through the image channel 5, and the red (R), green (G) and blue (B) three primary color data of each pixel after decoding It is transmitted to the correction operation device 6 through the image channel 5; one end of the light color correction parameter register 10 has four connection modes: a, connect with the DVI receiver 4, the brightness and the chromaticity correction parameter of the corresponding physical pixel of the specific LED display screen are added into the DVI standard signal, sent according to the protocol, and the brightness and chromaticity correction parameters separated by the DVI receiver 4 are loaded into the light color correction parameter register 10; b, connected with the USB port of the computer 1, corresponding to the specific LED display The brightness and chromaticity correction parameters of the physical pixels are loaded into the light color correction parameter buffer 10 through the USB port of the computer 1; c, connected with the RS232 serial port or parallel port of the computer 1, the brightness and chromaticity of the physical pixels corresponding to the specific LED display The correction parameters are loaded into the light color correction parameter buffer 10 through the communication port of the computer 1, that is, the RS232 serial port or the parallel port; d, connected to the U disk, and the brightness and chromaticity correction parameters corresponding to the physical pixels of the specific LED display are loaded into the optical color correction parameter through the U disk. Color correction parameter register 10. The other end of the light color correction parameter buffer 10 is connected to the correction operation device 6, and the correction parameters are transmitted to the correction operation device 6, and the red (R), green (G), and blue (B) after decoding are decoded by the correction operation device 6. The brightness and chromaticity data of the three primary colors are calculated and processed with the calibration parameter data, and the red (R), green (G) and blue (B) three primary color data after fitting are output; the red (R), green ( G), the blue (B) three primary color data are recovered into the same format as the video signal source data by the DVI transmitter 7, and sent to the flat panel display 3.

Among Fig. 3, DVI receiver 4 receives standard DVI video input signal, decodes signal through DVI receiver 4, finishes clock recovery and synchronous processing of data, decomposes the red (R), green (G), green (G) of each pixel. The blue (B) three-primary color image data signal is transmitted to the correction operation device 6 through the image channel 5 . The light color correction parameter register 10 stores brightness and chromaticity correction parameters corresponding to physical pixels of a specific LED display screen. These luminance and chromaticity correction parameters and the video signal luminance and chromaticity values of the corresponding correction points of the image channel 5 are corrected by the computing device 6 to realize the luminance and chromaticity correction computing function, that is, the brightness and chromaticity of the LED flat panel display 3 can be realized simultaneously. Correction. The red (R), green (G) and blue (B) three-primary color image data after the calibration operation produces the fitting are carried out serialization processing to the final video signal through the TMDS transmitter in the DVI transmitter 7, and the original three groups 8bits RGB signal, synchronous signal, control signal and clock signal are converted and minimized encoding to form four-channel positive and negative complementary signal data, that is, DVI standard video signal output.

It should be noted that the calibration parameters described in FIG. 3 are directly loaded, and the calibration parameter data is volatile data. When the display system is powered on, all calibration parameters must be reloaded to take effect. After the system is powered off, all calibration parameters are lost.

Embodiment two

FIG. 4 is a schematic structural diagram of the light and color parameter EEPROM loading method of the correction device for light and color parameters of the flat panel display 3 of the present invention. As shown in the figure, the connection mode of DVI receiver 4, image channel 5, correction operation device 6, and DVI transmitter 7 is the same as that of Embodiment 1; correction parameter storage device 8 adopts EEPROM memory 9 and light color correction parameter register 10, EEPROM One end of the memory 9 is connected to the light color correction parameter register 10, and the other end of the light color correction parameter register 10 is connected to the correction operation device 6; the other end of the EEPROM memory 9 has five connection modes: a, communication port with the computer 1 That is RS232 serial port or parallel port connection; b. connection with the USB port of the computer 1; c. connection with the U disk; d. connection with the DVI receiver 4; f. connection with the external EEPROM reader. The correction parameters are stored in the EEPROM memory 9 in five ways: a, through the communication port of the computer 1, that is, the RS232 serial port or the parallel port; c, the device of the present invention has a USB port Master end, which can be externally connected to a U disk, and the correction parameters can be read from the U disk; d, the correction parameters can also be added to the DVI standard signal, sent according to the protocol, and passed through the DVI receiver 4. Separate the correction E parameters and store them in the EEPROM memory 9; f. The correction parameters are pre-written in the EEPROM memory 9 through an external EEPROM reader.

All the calibration parameters in Figure 4 are loaded in EEPROM, and the calibration parameter data is non-volatile data. When the display system is powered on, all calibration parameters do not need to be reloaded.

Embodiment three

This embodiment is a special case of implementation 1 and implementation 2. Only the brightness of the LED display screen is corrected, and the light color correction parameter register 10 only stores correction parameters for brightness, which includes two situations:

1. For the brightness correction parameters of the display screen, it is superimposed and calculated with the brightness value of the video signal at the corresponding correction point, and is output as the video signal output of the corresponding correction point of the LED display. Full screen single primary color brightness normalization.

2. The video display has a white point matching problem. The red, green, and blue luminance of the video display must have a suitable luminance ratio range in order to display a more ideal white field (white balance). Generally, Asians adapt to warmer whites, and the ratio of red, green, and blue brightness for LED displays is about 3:6:1. Generally, Europeans tend to be cooler white, and the ratio of red, green, and blue brightness is about 2:7:1. Therefore, white field matching is only a range, which is set according to people's subjective feeling, and there is no fixed value. In the special case of brightness correction in the present invention, the brightness correction parameters of red, green, and blue primary colors are multiplied by the red, green, and blue brightness ratio coefficients required to match the white field, and the white field matching setting and adjustment can be realized while the brightness is corrected. Function.

Embodiment four

This embodiment mainly realizes the image scaling and matching between the LED display screen composed of independent pixels and the video source image. FIG. 5 is a structural schematic diagram of the correction device for light and color parameters of the flat panel display 3 applied to the image scaling of the LED display screen of the present invention. One end of the DVI receiver 4 is connected with the computer 1, and the other end is connected with the scaling operation unit 11 through the image channel 5, the other end of the scaling operation unit 11 is connected with the correction operation device 6, and the other end of the correction operation device 6 is connected with the DVI transmitter 7 connection; the correction parameter storage device 8 is connected with the DVI receiver 4 or the computer 1 communication port, that is, the RS232 serial port or the parallel port, and the correction parameter is sent to the correction parameter storage device 8 through the computer 1 communication port, that is, the RS232 serial port or the parallel port, or the correction parameter is added to The DVI standard signal is sent according to the protocol, and the correction parameters are separated by the DVI receiver 4 and stored in the correction parameter storage device 8 . One end of the image scaling command buffer 12 is connected to the correction parameter storage device 8, and one end is connected to the DVI receiver 4 or the communication port of the computer 1, that is, the RS232 serial port or the parallel port. The image scaling command word is loaded in two ways: a, through the communication port of the computer 1 That is, the RS232 serial port or parallel port is sent to the image scaling command buffer 12; b, the image scaling command word can be added to the DVI standard signal, and sent according to the agreement, the image scaling command word separated by the DVI receiver 4 in Fig. 5 is stored in the image scaling command buffer 12. The correction parameters stored in the correction parameter storage device 8 are scaled by the image scaling command buffer 12 and then transmitted to the correction operation device 6; the red (R), green (G), green (G), and The blue (B) three-primary color image data signal is transmitted to the scaling calculation unit 11 through the image channel 5 for scaling, and the scaled image data signal is superimposed and calculated with the scaled correction parameters in the correction calculation device 6, thereby realizing image scaling. Correct the light color parameters at the same time. All image scaling operations are completed by hardware without affecting the real-time transmission of images. The correction parameter storage device 8 adopts the light color correction parameter register 10 , or adopts the EEPROM memory 9 and the light color correction parameter register 10 .

Embodiment five

FIG. 6 is a schematic diagram of the structure of the correction device for light and color parameters of the flat panel display 3 of the present invention applied to the virtual display of the LED display. This embodiment is actually a special case of the fourth embodiment to realize the image scaling function. Because some LED displays do not require stepless scaling, the application of stepless scaling for LED displays with smaller areas and larger pixel pitches is of little significance. Generally, the method of virtual display is used to increase the information by 2 times in the length and width directions of the image, that is, to increase the density display of the image source information on the physical pixels of the LED display, that is, there are real image points and virtual image points, and the use of human vision Persistence characteristics, can perceive image information increased by 4 times. (Refer to "A Method for Improving Display Image Resolution by Pixel Multiplexing" (Patent Application No. 200510016948.7)) As shown in Figure 6, one end of the DVI receiver 4 is connected to the computer 1, and the other end is connected to the virtual computer through the image channel 5. Computing unit 13 is connected, and the other end of virtual computing unit 13 is connected with correction computing device 6, and the other end of correction computing device 6 is connected with DVI transmitter 7; Correction parameter storage device 8 and DVI receiver 4 or computer 1 communication port are RS232 serial port or parallel port connection, the calibration parameters are sent to the calibration parameter storage device 8 through the communication port of the computer 1, that is, the RS232 serial port or parallel port, or the calibration parameters are added to the DVI standard signal, sent according to the protocol, and the calibration parameters are separated by the DVI receiver 4 Stored in the correction parameter storage device 8. One end of the image virtual display command buffer 14 is connected with the correction parameter storage device 8, and one end is connected with the DVI receiver 4 or the communication port of the computer 1, that is, the RS232 serial port or the parallel port. The image virtual display command word is loaded in two ways: a, through the computer 1 The communication port is the RS232 serial port or the parallel port and sends to the image virtual display command register 14; b, the image virtual display command word can be added to the DVI standard signal, sent according to the protocol, and the image virtual display separated by the DVI receiver 4 in Fig. 5 The command words are stored in the image virtual display command buffer 14 . The correction parameters stored in the correction parameter storage device 8 are transmitted to the correction operation device 6 after the image virtual display command buffer 14 performs a virtual operation; the red (R) and green (G ), blue (B) three-primary color image data signals are transmitted to the image virtual operation unit 13 through the image channel 5 for virtual operation, and the image data signal after the virtual operation is superimposed with the correction parameters after the virtual operation in the correction operation device 6 , so as to realize the correction of light color parameters while the image is displayed virtually. The correction parameter storage device 8 adopts the light color correction parameter register 10 , or adopts the EEPROM memory 9 and the light color correction parameter register 10 .

Embodiment six

All linear flat panel displays 3 have the problem of γ correction, and the patent of the present invention can also realize setting of γ value and adjustment of contrast. FIG. 7 is a schematic structural diagram of the application of the device for correcting the light and color parameters of the flat panel display 3 of the present invention to the setting of the γ value of the LED display. As shown in Figure 7, one end of the DVI receiver 4 is connected to the computer 1, and the other end is connected to the gamma value conversion operation unit 15 through the image channel 5, and the other end of the gamma value conversion operation unit 15 is connected to the correction operation device 6, and the correction operation The other end of the device 6 is connected to the DVI transmitter 7; the correction parameter storage device 8 is connected to the DVI receiver 4 or the communication port of the computer 1, that is, the RS232 serial port or parallel port, and the correction parameters are sent to the calibration station through the communication port of the computer 1, that is, the RS232 serial port or the parallel port. The parameter storage device 8, or add the correction parameter to the DVI standard signal, send it according to the protocol, separate the correction parameter through the DVI receiver 4 and store it in the correction parameter storage device 8. One end of the set image gamma value buffer 16 is connected with the correction parameter storage device 8, and one end is connected with the DVI receiver 4 or the communication port of the computer 1, that is, the RS232 serial port or parallel port, and the image gamma value is loaded in two ways: a, through computer 1 communication Mouth is RS232 serial port or parallel port and sends to setting image gamma value register 16; B, image gamma value can be added in the DVI standard signal, sends by agreement, the image gamma value separated by DVI receiver 4 among Fig. 5 is stored in Set the image gamma value buffer 16. The other end of the set image gamma value buffer 16 is connected to the gamma value conversion computing unit 15 . The correction parameters stored in the correction parameter storage device 8 are transferred to the correction operation device 6 through the set image gamma value buffer 16 for gamma value conversion operation; the red (R), green (G), blue (B) three primary color image data signals are transmitted to the image gamma value conversion calculation unit 15 through the image channel 5 for gamma value conversion calculation, and the image data signal after the gamma value conversion calculation is combined with the gamma value in the correction calculation device 6 The correction parameters after the value transformation operation are superimposed, so as to realize the correction of the light color parameters while the γ value is transformed. The correction parameter storage device 8 adopts the light color correction parameter register 10 , or adopts the EEPROM memory 9 and the light color correction parameter register 10 .

Image channel 5, correction operation device 6, light color correction parameter buffer 10, image scaling command buffer 12, image scaling operation unit 11, image virtual display command buffer 14, image virtual operation unit 13, image gamma value in the present invention The buffer 16 and the image gamma value conversion operation unit 15 are all integrated into the programmable logic device through programming, and the programmable logic device is EP1C6Q240C8N. DVI receiver 4 selects model TFP101APZP; DVI transmitter 7 selects model TFP410PAP. EEPROM memory 9 selects ATMEL606-24C512 for use.

Claims (8)

1. A method for correcting light and color parameters of a flat panel display, comprising the steps of: Pre-measure each pixel of the flat panel display, obtain the light and color correction parameters of each pixel and load them into the storage device; Decode the video signal source data from the computer, extract the red, green and blue primary color image data of each pixel, and complete the clock recovery and data synchronization processing; Perform digital calculation and processing on the decoded red, green and blue primary color data of each pixel and the light color correction parameters of each pixel to obtain the fitted red, green and blue primary color data of each pixel; It is characterized in that it also includes the following steps: The fitted red, green and blue primary color data of each pixel is restored to the same format as the video signal source data and sent to the flat panel display. 2. A light color parameter correction device for a flat panel display, comprising a DVI receiver (4), a correction operation device (6), a correction parameter storage device (8), and one end of the DVI receiver (4) is connected with a computer (1), Receive the DVI video signal source data output by the computer (1) and decode it, extract the red, green, and blue primary color data of each pixel, and complete the clock recovery and data synchronization processing; one end of the correction parameter storage device (8) It is connected with the correction operation device (6), and the correction parameters are transmitted to the correction operation device (6), and the correction operation device (6) performs calculation and processing on the decoded red, green and blue primary color data and correction parameter data of each pixel , the red, green, blue three primary color data after output fitting; It is characterized in that also comprising image channel (5), DVI sender (7); The other end of DVI receiver (4) passes image channel (5) and correction Computing device (6) is connected, and the red, green, blue three primary color data of each pixel after decoding is transmitted to correcting computing device (6) through image channel (5); The other end of correcting computing device (6) and DVI sender ( 7) connection, the red, green and blue primary color data after fitting are recovered into the same format as the video signal source data by the DVI transmitter (7), and sent to the flat panel display (3). the 3. flat panel display light and color parameter correcting device according to claim 2, it is characterized in that correction parameter storage device (8) adopts light and color correction parameter register (10); One end of light and color correction parameter register (10) and The DVI receiver (4), the RS232 serial port or parallel port of the computer (1), the USB port or the U disk of the computer (1) are connected, and the other end of the light color correction parameter register (10) is connected with the correction operation device (6). 4. The flat panel display light and color parameter correction device according to claim 2, characterized in that the correction parameter storage device (8) adopts EEPROM memory (9) and light color correction parameter register (10), one end of the EEPROM memory (9) One end of the light color correction parameter register (10) is connected, and the other end of the light color correction parameter register (10) is connected with the correction operation device (6); the other end of the EEPROM memory (9) is connected with the communication port of the computer (1). RS232 serial port or parallel port, USB port of computer (1), and U disk, DVI receiver (4) or external EEPROM reader/writer. 5. The flat panel display light color parameter correcting device according to claim 2, characterized in that the image channel (5) is connected with the correcting computing device (6) through the zoom computing unit (11); one end of the correction parameter storage device (8) is connected to DVI receiver (4) or computer (1) communication port is connected with RS232 serial port or parallel port, and the other end is connected with image scaling command buffer (12); one end of image scaling command buffer (12) is connected with DVI receiver (4) Or the computer (1) communication port is RS232 serial port or parallel port connection, and the other end is connected with the correction operation device (6); the correction parameters are sent to the correction parameter storage device (8) by the computer (1) communication port, namely the RS232 serial port or parallel port, or Add the correction parameters to the DVI standard signal and send them according to the protocol. The correction parameters separated by the DVI receiver (4) are stored in the correction parameter storage device (8); the correction parameters stored in the correction parameter storage device (8) pass through the image The scaling command register (12) is transmitted to the correction operation device (6) after scaling; the image scaling command word is sent to the image scaling command register (12) through the communication port of the computer (1), that is, the RS232 serial port or the parallel port, or the image scaling command Word is added in the DVI standard signal, sends by agreement, and the image scaling command word separated through DVI receiver (4) is stored in the image scaling command register (12). 6. The flat panel display light color parameter correction device according to claim 2, characterized in that the image channel (5) is connected with the correction operation device (6) through a virtual operation unit (13); one end of the correction parameter storage device (8) is connected to DVI receiver (4) or computer (1) communication port is RS232 serial port or parallel port connection, and the other end is connected with image virtual display command buffer (14); one end of image virtual display command buffer (14) is connected with DVI receiver (4) ) or the computer (1) communication port is RS232 serial port or parallel port connection, and the other end is connected with the correction operation device (6); the correction parameter is sent to the correction parameter storage device (8) by the computer (1) communication port that is the RS232 serial port or parallel port, Or the correction parameter is added in the DVI standard signal, sends by agreement, and the correction parameter separated by DVI receiver (4) is stored in the correction parameter storage device (8); The correction parameter stored by the correction parameter storage device (8) passes through The image virtual display command buffer (14) is transmitted to the correction operation device (6) after virtual calculation; the image virtual display command word is sent to the image virtual display command buffer (14) through the communication port of the computer (1), that is, the RS232 serial port or parallel port or the image virtual display command word is added in the DVI standard signal, and is sent by agreement, and the image virtual display command word separated by the DVI receiver (4) is stored in the image virtual display command register (14). 7. The flat panel display light color parameter correction device according to claim 2, characterized in that the image channel (5) is connected with the correction operation device (6) through the gamma value conversion operation unit (15); the correction parameter storage device (8) One end is connected with the DVI receiver (4) or the communication port of the computer (1), that is, the RS232 serial port or the parallel port, and the other end is connected with the setting image gamma value register (16); one end of the setting image gamma value register (16) is connected with the DVI The receiver (4) or the communication port of the computer (1) is connected to the RS232 serial port or parallel port, and the other end is connected to the correction operation device (6); the correction parameters are sent to the correction parameter storage device through the computer (1) communication port, namely the RS232 serial port or parallel port (8), or correction parameters are added to the DVI standard signal, sent by agreement, and the correction parameters separated by the DVI receiver (4) are stored in the correction parameter storage device (8); the correction parameter storage device (8) stores The correction parameters are transferred to the correction operation device (6) through the set image gamma value buffer (16) for gamma value conversion operation; the image gamma value is sent to the set image gamma value through the communication port of the computer (1), that is, the RS232 serial port or parallel port buffer (16); or the image gamma value is added to the DVI standard signal, sent by agreement, and the image gamma value separated by the DVI receiver (4) is stored in the set image gamma value buffer (16). 8. The light and color parameter correction device for flat panel displays according to claims 5 to 7, characterized in that the correction parameter storage device (8) adopts a light and color correction parameter register (10), or adopts an EEPROM memory (9) and light and color correction Parameter register (10). the

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