CN111768745B - System debugging method for improving liquid crystal display television color gamut contact ratio - Google Patents
System debugging method for improving liquid crystal display television color gamut contact ratio Download PDFInfo
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- CN111768745B CN111768745B CN202010788225.3A CN202010788225A CN111768745B CN 111768745 B CN111768745 B CN 111768745B CN 202010788225 A CN202010788225 A CN 202010788225A CN 111768745 B CN111768745 B CN 111768745B
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/57—Control of contrast or brightness
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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- Processing Of Color Television Signals (AREA)
Abstract
The invention discloses a system debugging method for improving the color gamut contact ratio of a liquid crystal television, which presets the parameter ranges of three factors and judges whether the acquired parameter values of the three factors are in the preset ranges of the parameters, and comprises the following steps: acquiring a parameter I of a core factor; judging whether the parameter I is within a preset range of the register value; acquiring a parameter II of the TCON; judging whether the parameter II is in a preset range of the value of the function storage register; r, G, B spectral structure wavelength parameters of lamp beads of the backlight system factor lamp bar are obtained; detecting and judging whether the wavelength parameter of the spectrum structure is in a preset range of the peak wavelength value by the frequency spectrograph; and the lamp beads corresponding to the wavelength parameters of the spectrum structure are used as backlight lamp bars of the liquid crystal display television by the parameters I and II automatically executed by the operation terminal. The invention achieves the purposes of improving the color gamut contact ratio of the liquid crystal display television, increasing the color gamut contact ratio by 13-15% and reducing the true color.
Description
Technical Field
The invention relates to the field of color gamut display of liquid crystal televisions, in particular to a system debugging method for improving the color gamut contact ratio of a liquid crystal television.
Background
The color gamut coverage rate is always an important measurement index of color expression of the liquid crystal display television as an industry standard and represents the display quantity of colors, but under the condition of the same color gamut coverage rate, the color display effect is often different, some color saturation is not enough or the color tone displays obvious color cast, the same color gamut coverage rate can be seen, and different color reducibility exists. Therefore, the color gamut contact ratio index is newly added in the new high-quality liquid crystal television color evaluation system, and the index can describe the color display quantity, better describe the color reducibility and the primary color deviation of the liquid crystal television and better represent the color accuracy. In order to better meet the new standard of the industry, simultaneously, the color gamut contact ratio of the product is improved, the image quality effect is improved, the liquid crystal television can not only achieve the standard in the color display quantity, but also reduce the distortion of color display and improve the color reducibility.
Disclosure of Invention
The invention aims to provide a system debugging method for improving the color gamut contact ratio of a liquid crystal display television, which is used for achieving the purposes of improving the color gamut contact ratio of the liquid crystal display television and restoring the true color.
The invention solves the problems through the following technical scheme:
a system debugging method for improving the color gamut contact ratio of a liquid crystal television acquires a core factor, a TCON factor and a backlight system factor which influence the color gamut contact ratio, presets the parameter ranges of the three factors, and judges whether the parameter values acquired by the three factors are within the preset ranges of the parameters comprises the following steps:
step 1) obtaining a parameter I of a core factor;
step 2) judging whether the parameter I is in a register value preset range, if so, storing the parameter I and entering the next step, and if not, returning to the step 1) to adjust the parameter value;
step 3), TCON factors comprise three functions of LINE OD, C GAIN and VAC, function storage registers of the three functions are set, and parameters II of the three functions are obtained;
step 4) judging whether the parameter II is in a preset range of the function storage register value, if so, storing the parameter II and entering the next step, and if not, returning to the step 3) to adjust the parameter value;
step 5), R, G, B spectral structure wavelength parameters of lamp beads of the backlight system factor lamp bar are obtained;
step 6), detecting and judging whether the wavelength parameter of the spectrum structure is in a preset range of the peak wavelength value by a frequency spectrograph, if so, entering step 7), otherwise, reconfiguring the fluorescent powder component of the lamp bead in the backlight lamp bar, and executing step 5) and step 6);
and 7) automatically executing the parameter I in the step 2) and the parameter II in the step 4) by the operation terminal, and taking the lamp beads corresponding to the spectral structure wavelength parameters in the step 6) as backlight lamp bars of the liquid crystal television.
Preferably, the engine factors that affect the gamut overlap ratio include saturation, brightness, contrast, monochrome field brightness, gamma curve, and white balance parameters.
Preferably, the preset range of the register value of the saturation is set to be greater than 130, the preset range of the register value of the brightness is set to be 122-128, the preset range of the register value of the contrast is set to be greater than 125, and the preset range of the register value of the white balance is set to be 20-100.
Preferably, the color temperature characteristic value of the gamma curve is larger than 6500K.
Preferably, the preset range of the storage register value of cgain is set to be less than 0x 60.
Preferably, the spectral structures include a red powder configuration and spectral structure, a green powder configuration and spectral structure, and a blue chip light emission spectral structure.
Preferably, the preset range of the red peak wavelength value of the red powder configuration and the spectrum structure is set to be 603.5nm-606.5nm, the preset range of the green peak wavelength value of the green powder configuration and the spectrum structure is set to be 509.5nm-512.5nm, and the preset range of the blue peak wavelength value of the blue chip light-emitting spectrum structure is 445nm-450 nm.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the method analyzes factors and related functions influencing the color gamut contact ratio of the liquid crystal television through experiments, extracts key factors, improves the color gamut contact ratio, reduces color distortion and primary color deviation, improves the use experience of users, improves the color gamut contact ratio of the whole liquid crystal television, and improves the total color gamut contact ratio by 13-15% under the condition of ensuring normal color gamut coverage ratio through correct function setting, parameter matching, storage unit increasing, parameter adjusting range formulating and automatic software detection and adjustment.
Drawings
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a liquid crystal OC transmission spectrum curve according to the present invention.
Fig. 3 is a comparison graph of the spectra of the high color gamut light bar and the common color gamut light bar according to the present invention.
FIG. 4 is a graph of the white field spectrum of the backlight after it has passed through the OC according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1:
referring to fig. 1, a system debugging method for improving color gamut contact ratio of a liquid crystal television obtains a core factor, a TCON factor and a backlight system factor which affect the color gamut contact ratio, presets parameter ranges of the three factors, and judges whether obtained parameter values of the three factors are within the preset ranges of the parameters, including the following steps:
step 1) obtaining a parameter I of a core factor; the core factors influencing the color gamut contact ratio comprise saturation, brightness, contrast, monochromatic field brightness, gamma curve and white balance; saturation, which is an analog quantity for adjusting the shade of color, the user adjustment range of saturation is 0-100, and the corresponding register value adjustment range is 0-255. The adjustment is carried out in the adjustment range, the maximum absolute value of the influence of the color gamut contact ratio is 52.2%, the influence degree is large, the saturation is an important influence factor of the color gamut contact ratio, and the color gamut contact ratio and the subjective effect can be ensured only by obtaining the optimal adjustment range. The brightness refers to the analog quantity for adjusting the brightness of the image, the brightness user adjustment range is 0-100, and the corresponding register value adjustment range is 0-255. The adjustment of the brightness has an effect of 5% on the gamut overlap ratio. The contrast and the contrast adjustment can ensure that the depth of field of the image is better, the image is darker in black and whiter in white. The user adjustment range of the contrast is 0-100, and the corresponding register value adjustment range is 0-255. Adjusted within this adjustment range, the gamut overlap effect was 4.5%. The brightness of the monochromatic field mainly refers to the brightness adjustment of red, green, blue, cyan, purple, yellow and skin color in the setting of the machine core. Of these color adjustments, the blue color adjustment has the greatest effect on the gamut overlap ratio, with an effect of 5.3%. The Gamma curve has the function of enabling the brightness curve index of the whole machine to meet the requirement of 2.2 for human eyes to watch, and simultaneously enabling the color temperature to reach the required target color temperature value. Gamma adjustment is divided into 3 parts, namely a first part, a standard Gamma part, a second part, UMAX, a third part and an eye protection mode; in order to meet the requirements of various graphic modes of the whole machine, a plurality of gamma curves are built in, the influence of each gamma curve on the color gamut overlapping degree is different, wherein the influence is the second kind and the third kind, and the influence is the largest. When the color temperature corresponding to the gamma curve is reduced, the color gamut contact ratio is reduced, and the reduction range is 1.5%. White balance, the adjusting parameters of white balance are R gain, G gain and B gain, and the user adjusting range is 0-100. The RGBG aims at adjusting the color temperature of a white field of the liquid crystal television to meet the specified requirements, the adjustment of white balance has influence on the brightness of the whole machine, and simultaneously has influence on the overlap ratio of color gamut, and the influence is 0.9 percent. When the adjustment of one of the terms is lower than the value of 10, the color gamut coincidence degree is sharply reduced to be more than 40%.
And 2) judging whether the parameter I is in a register value preset range, if so, storing the parameter I and entering the next step, and if not, returning to the step 1) to adjust the parameter value. And the parameter I is subjected to parameter adjustment according to a certain step value. The preset range of the register debugging value of the saturation is set to be larger than 130, the preset range of the register debugging value of the brightness is set to be 122-128, the preset range of the register value of the contrast is set to be larger than 125, and the preset range of the register debugging value of the white balance is set to be 20-100; the color temperature characteristic value of the gamma curve is larger than 6500K.
And step 3), TCON factors comprise three functions of LINE OD, C GAIN and VAC, function storage registers of the three functions are set, and parameters II of the three functions are obtained. The TCON is a key part for connecting the core board and the liquid crystal module circuit board, converts an image signal, a control signal and a clock signal output by the core board into a row and column control signal which can be identified by the liquid crystal module through a format, and is arranged in the television main chip and combined with the main chip into a whole. The LINE OD function improves the response time of the liquid crystal display television, the influence on the color gamut coincidence degree is 3%, and the color gamut coincidence degree is reduced under the condition that the LINE OD function is not set; the VAC function has the effects of improving the chromaticity visual angle of the liquid crystal television, the influence of VAC is smaller than that of LINE OD and is 0.25%, the VAC function is opened, the color gamut coincidence degree is improved, and the color visual angle is increased; c GAIN is the function of adjusting the color GAIN on the TCON board, and the function directly adjusts the total color GAIN, and the influence reaches 5.8 percent, and is mainly used in the 848 core TCONLESS state.
And 4) judging whether the parameter II is in a preset range of the function storage register value or whether the function is a preset value, if so, storing the parameter II and entering the next step, otherwise, returning to the step 3) for parameter adjustment, and adjusting the parameter according to the addition and subtraction of a certain step value by the parameter II. The influence of the LINE OD, the C GAIN and the VAC functions is C GAIN, LINE OD and VAC in sequence; the preset range of the C GAIN's stored register value is set to less than 0x 60.
Step 5), R, G, B spectral structure wavelength parameters of lamp beads of the backlight system factor lamp bar are obtained; the spectrum structure comprises a red powder configuration and spectrum structure, a green powder configuration and spectrum structure and a blue chip light-emitting spectrum structure.
Step 6), detecting and judging whether the wavelength parameter of the spectrum structure is in a preset range of the peak wavelength value by a frequency spectrograph, if so, entering step 7), otherwise, reconfiguring the fluorescent powder component of the lamp bead in the backlight lamp bar, and executing step 5) and step 6); the preset range of the red peak wavelength value of the red powder configuration and the spectrum structure is set to be 603.5nm-606.5nm, the preset range of the green peak wavelength value of the green powder configuration and the spectrum structure is set to be 509.5nm-512.5nm, and the preset range of the blue peak wavelength value of the blue chip light-emitting spectrum structure is 445nm-450 nm.
And 7) automatically executing the parameter I in the step 2) and the parameter II in the step 4) by the operation terminal, and taking the lamp beads corresponding to the spectral structure wavelength parameters in the step 6) as backlight lamp bars of the liquid crystal television.
The color gamut overlapping degree is determined according to the matching degree of the light bar and the liquid crystal OC of the backlight system factor. Different liquid crystal OC matches same backlight, and the influence to colour gamut coincidence degree is greater than 5%, and the lamp strip of different spectrums produces great influence to colour gamut coincidence degree, and the influence degree is 20%. Different liquid crystal OCs, under the condition of the same backlight, the spectral transmittance curves of the three colors R G B are different, as shown in fig. 2, the R G B finally results in the difference of the curves and the difference of the color gamut overlapping degree after combination, under the condition of the same liquid crystal OC, the wavelength parameter of the spectral structure is set in the preset range of the peak wavelength value, the color gamut overlapping degree can reach the highest, and the passing condition of the spectral energy is shown in fig. 4.
When the high color gamut light bar is applied, in order to improve the color gamut coincidence of a high color gamut complete machine by more than 90%, the light bar is improved on red powder, and the peak wavelength value is generally less than 650nm, as shown in fig. 3.
The method analyzes factors and related functions influencing the color gamut contact ratio of the liquid crystal television through experiments, extracts key factors, improves the color gamut contact ratio, reduces color distortion and primary color deviation, improves the use experience of users, improves the color gamut contact ratio of the whole liquid crystal television, and improves the total color gamut contact ratio by 13-15% under the condition of ensuring normal color gamut coverage ratio through correct function setting, parameter matching, storage unit increasing, parameter adjusting range formulating and automatic software detection and adjustment.
Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are intended to be preferred embodiments of the present invention, it is to be understood that the invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.
Claims (7)
1. A system debugging method for improving the color gamut contact ratio of a liquid crystal display television is characterized by comprising the following steps: the method comprises the following steps of acquiring the cassette mechanism factors, TCON factors and backlight system factors which affect the color gamut contact ratio, presetting the parameter ranges of the three factors, and judging whether the acquired parameter values of the three factors are within the preset ranges of the parameters:
step 1) obtaining a parameter I of a core factor;
step 2) judging whether the parameter I is in a register value preset range, if so, storing the parameter I and entering the next step, and if not, returning to the step 1) to adjust the parameter value;
step 3), TCON factors comprise three functions of LINE OD, C GAIN and VAC, function storage registers of the three functions are set, and parameters II of the three functions are obtained;
step 4) judging whether the parameter II is in a preset range of the function storage register value, if so, storing the parameter II and entering the next step, and if not, returning to the step 3) to adjust the parameter value;
step 5), R, G, B spectral structure wavelength parameters of lamp beads of the backlight system factor lamp bar are obtained;
step 6), detecting and judging whether the wavelength parameter of the spectrum structure is in a preset range of the peak wavelength value by a frequency spectrograph, if so, entering step 7), otherwise, reconfiguring the fluorescent powder component of the lamp bead in the backlight lamp bar, and executing step 5) and step 6);
and 7) automatically executing the parameter I in the step 2) and the parameter II in the step 4) by the operation terminal, and taking the lamp beads corresponding to the spectral structure wavelength parameters in the step 6) as backlight lamp bars of the liquid crystal television.
2. The system debugging method for improving the color gamut contact ratio of the liquid crystal display television according to claim 1, wherein: the core factors that affect gamut overlap include saturation, brightness, contrast, monochrome field brightness, gamma curve, and white balance parameters.
3. The system debugging method for improving the color gamut contact ratio of the liquid crystal display television according to claim 2, wherein: the preset range of the register value of the saturation is set to be larger than 130 and not more than 255, the preset range of the register value of the brightness is set to be 122-128, the preset range of the register value of the contrast is set to be larger than 125 and not more than 255, and the preset range of the register value of the white balance is set to be 20-100.
4. The system debugging method for improving the color gamut contact ratio of the liquid crystal display television according to claim 2, wherein: the color temperature characteristic value of the gamma curve is larger than 6500K.
5. The system debugging method for improving the color gamut contact ratio of the liquid crystal display television according to claim 1, wherein: the preset range of the C GAIN's stored register value is set to less than 0x 60.
6. The system debugging method for improving the color gamut contact ratio of the liquid crystal display television according to claim 1, wherein: the spectrum structure comprises a red powder configuration and spectrum structure, a green powder configuration and spectrum structure and a blue chip light-emitting spectrum structure.
7. The system debugging method for improving the color gamut contact ratio of the liquid crystal display television according to claim 6, wherein: the preset range of the red peak wavelength value of the red powder configuration and the spectrum structure is set to be 603.5nm-606.5nm, the preset range of the green peak wavelength value of the green powder configuration and the spectrum structure is set to be 509.5nm-512.5nm, and the preset range of the blue peak wavelength value of the blue chip light-emitting spectrum structure is 445nm-450 nm.
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| CN101520991A (en) * | 2008-02-27 | 2009-09-02 | 深圳Tcl新技术有限公司 | Image status adjustment method for liquid crystal display |
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