CN101894541A - Method and system for correcting color temperature of display device - Google Patents
Method and system for correcting color temperature of display device Download PDFInfo
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- CN101894541A CN101894541A CN 201010222755 CN201010222755A CN101894541A CN 101894541 A CN101894541 A CN 101894541A CN 201010222755 CN201010222755 CN 201010222755 CN 201010222755 A CN201010222755 A CN 201010222755A CN 101894541 A CN101894541 A CN 101894541A
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Abstract
The invention discloses a method and a device for correcting the color temperature of a display device, which aim to solve the problem of unsatisfactory correction of the color temperature of the display device in the prior art. The method for correcting the color temperature of the display device comprises the following steps of: controlling the display device, so that the display device displays a full-white image of which the gray scale is selected; detecting color coordinates and color temperature of the full-white image displayed by the display device; and adjusting the R gray scale and/or B gray scale of the display device on the current gray scale according to the color coordinates, and when the color temperature of the full-white image displayed by the display device after adjustment is within set range, storing a current adjustment result according to the selected gray scale. By adopting the technical scheme of the invention, the deviation of the color temperature of the display device can be adjusted accurately, so that the good display effect is acquired.
Description
Technical field
The present invention relates to field of computer technology, in particular to a kind of method and system of correcting color temperature of display device.
Background technology
Colour temperature is the important parameter of display device, is directly connected to the picture quality of display device.In theory, the image that shows when the gray-scale value of R, the G of display device, B equates is complete white image, but because the various defectives of hardware device, the color temp of Xian Shiing is undesirable in these cases, make image look inclined to one side indigo plant or yellow partially, need proofread and correct this moment to the colour temperature of display device.
In present display device, the method for proofreading and correct colour temperature generally is to preserve the empirical value of a correction in display device, and display device is all proofreaied and correct colour temperature according to this empirical value when showing each image gray.
In relevant technical scheme, undesirable to the effect that color temperature of display device is proofreaied and correct, at this problem, effective solution is not proposed as yet at present.
Summary of the invention
The object of the present invention is to provide a kind of method and apparatus of correcting color temperature of display device, to solve the unfavorable problem of effect of in the prior art color temperature of display device being proofreaied and correct.
To achieve these goals, according to an aspect of the present invention, provide a kind of method of correcting color temperature of display device.
The method of this correcting color temperature of display device of the present invention comprises: step a, the described display device of control make it to show the complete white image of selected gray scale; The chromaticity coordinates and the colour temperature of the described complete white image that step b, the described display device of detection show; Step c, adjust described display device in the gray scale of the R of current gray level and/or the gray scale of B according to described chromaticity coordinates, when the colour temperature of the described complete white image of adjusting the described display device demonstration in back is in setting range, preserve current adjustment result corresponding to described selected gray scale.
Further, before described step a, also comprise: a plurality of selected gray scale of from GTG ratio, selecting to comprise the first selected gray scale; Also comprise after described step c: repeatedly carry out described step a, step b and step c successively, selected gray scale and the selected gray scale among the executed step a during wherein each execution in step a are inequality.
To achieve these goals, according to an aspect of the present invention, provide the method for another correcting color temperature of display device.
The method of this correcting color temperature of display device of the present invention comprises: step a, the described display device of control make it to show the complete white image of selected gray scale; Chromaticity coordinates, colour temperature and the brightness of the described complete white image that step b, the described display device of detection show; Step c, adjust described display device in the gray scale of the R of current gray level and/or the gray scale of B according to described chromaticity coordinates, the brightness that is in setting range and described complete white image when the colour temperature of adjusting the described complete white image that the described display device in back shows is satisfied when pre-conditioned, preserves current adjustment result corresponding to described selected gray scale.
Further, before described step a, also comprise: a plurality of selected gray scale of from GTG ratio, selecting to comprise the first selected gray scale; Also comprise after described step c: repeatedly carry out described step a, step b and step c successively, selected gray scale and the selected gray scale among the executed step a during wherein each execution in step a are inequality.
Further, described pre-conditioned comprising: the brightness flop phenomenon does not appear in the described complete white image that described display device shows.
To achieve these goals, according to an aspect of the present invention, provide a kind of system of correcting color temperature of display device.
The system of correcting color temperature of display device of the present invention comprises output unit, measurement mechanism and calculation element, and wherein: described output unit is used for sending the information of image and the adjustment result of described calculation element being sent to described display device to display device; Described measurement mechanism is used for detecting the chromaticity coordinates and the colour temperature of this image that described display device shows under the situation of image for the complete white image of selected gray scale that described output unit sends; Described calculation element, be used for adjusting described display device in the gray scale of the R of current gray level and/or the gray scale of B according to the detected chromaticity coordinates of described measurement mechanism, when the colour temperature of the described complete white image of adjusting the described display device demonstration in back is in setting range, current adjustment result is sent to described output unit.
Further, described measurement mechanism also is used for detecting the brightness of this image that described display device shows under the situation of image for the complete white image of selected gray scale that described output unit sends; Described calculation element also is used for adjusting described display device in the gray scale of the R of current gray level and/or the gray scale of B according to the detected chromaticity coordinates of described measurement mechanism, the brightness that is in setting range and described complete white image when the colour temperature of adjusting the described complete white image that the described display device in back shows is satisfied when pre-conditioned, and current adjustment result is sent to described display device.
Use technical scheme of the present invention, adjust the chromaticity coordinates of display device each gray scale in the GTG system, make the colour temperature of each gray scale near desired color temperature, this mode can be adjusted the deviation of the colour temperature of display device comparatively exactly, thereby obtains good display.And the method in the present embodiment has been also noted that the phenomenon of avoiding occurring the brightness upset, has guaranteed the rationality of display effect.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram according to the method for the correcting color temperature of display device in the embodiment of the invention;
Fig. 2 is an XYZ chromaticity diagram;
Fig. 3 is the synoptic diagram according to the system architecture of the correcting color temperature of display device in the embodiment of the invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Fig. 1 is the process flow diagram according to the method for the correcting color temperature of display device in the embodiment of the invention.As shown in Figure 1, this method comprises that mainly step S11 is to step S23.
Step S11: send complete white image to display device.
Pass through in this step to the complete white image of display device transmission, be somebody's turn to do complete white image thereby the control display device makes it demonstration, this full gray scale of image in vain is previously selected, and after the process flow process of Fig. 1, display device promptly obtains proofreading and correct for the colour temperature of this gray scale.
Step S13: detect the full chromaticity coordinates and the colour temperature of image in vain that display device shows.
Can use existing various pick-up unit to detect, and write down detected chromaticity coordinates and colour temperature.
Step S15: judge whether detected colour temperature is in setting range.If enter step S23, otherwise enter step S17.
Step S17: adjust display device in the gray scale of the R of current gray level and/or the gray scale of B according to detected chromaticity coordinates.
Step S19: will adjust the result and send to display device.
Step S21: display device shows complete white image according to the adjustment result who receives.
Enter step S13 after this step, proceed to detect.
Step S23: preserve data.
Below in conjunction with Fig. 2 above step is described further, Fig. 2 is an XYZ chromaticity diagram.In general desired color temperature about 9000K, is reflected on the chromatic diagram, and the C point is the standard white light, and it has desired color temperature.The purpose of color temperature correction is that the chromaticity coordinates of the complete white image of current demonstration is adjusted to as much as possible near the C point, certainly because the limitation of hardware performance, in general can't adjust to the C point fully, but for the recognition capability of human eye, near chromaticity coordinates image in scope C point looks to be exactly the white of standard of comparison.
Below lift a numerical example.For example, the complete white image that sends to display device adopts 256 GTG ratios, R=G=B=100 wherein, and detecting the color temperature value that obtains the image that display device shows is 7500.Because desired color temperature is about 9000, thus the gray scale of R need be reduced, with the gray scale increase of B.Can adjust according to predefined adjustment algorithm, for example each the adjustment adopted identical adjustment step value, perhaps adopts corresponding adjustment step value according to color temperature value and the difference between the desired color temperature value that detection obtains.Adjust the colour temperature and the chromaticity coordinates of the image that detects the display device demonstration afterwards once more at every turn and further adjust chromaticity coordinates, and judge according to colour temperature whether the adjustment to chromaticity coordinates can finish, and promptly whether colour temperature is in setting range.When the colour temperature of the complete white image of adjusting back display device demonstration was in setting range, the preservation data among the execution in step S23 specifically were to preserve the adjustment result corresponding to the previously selected gray scale among the step S11.In this example, for example ought adjust to R=96, during B=112, colour temperature is 9200, is in the setting range (8900,9300), just preserves the chromaticity coordinates of the image of current demonstration, is (0.285,0.296).This chromaticity coordinates is corresponding to the degree of 100 in 256 GTG ratios GTG.After that is to say that above-mentioned steps is carried out, finish for the colour temperature adjustment of 100 degree GTGs.Promptly according to R=96, G=100, B=112 are that benchmark shows to display device for the demonstration of 100 degree GTGs later on.
Can adjust the colour temperature of other gray scales according to the method described above.Previously selected gray scale can be a certain gray scale in 256 GTG ratios or the 1024 GTG ratios among the step S11, after adjustment finishes, correspondingly still from 256 GTG ratios or 1024 GTG ratios, select other gray scales again, begin to adjust from step S11, gray scale selected when the selected gray scale among the execution in step S11 is with executed step S11 at every turn is different, like this carry out 256 times or 1024 times above-mentioned steps after, the colour temperature of each GTG has all obtained adjustment in 256 GTGs or 1024 GTGs.Can certainly select a part of gray scale to adjust.
When carrying out the colour temperature adjustment for a plurality of GTGs, the brightness flop phenomenon may occur sometimes, after for example finishing corresponding to the colour temperature adjustment of two gray scales, the brightness of the complete white image of low gray scale is higher than the brightness of the entirely white image of higher gray scale on the contrary.This point can be understood in conjunction with Fig. 2, when adjusting colour temperature and make the chromaticity coordinates of the complete white image that shows, can level off to the C point from all directions, so complete white image for a certain gray scale, have a plurality of brightness with the C point apart under the identical situation at chromaticity coordinates, brightness wherein may be lower than the brightness of the lower a certain complete white image of gray scale, otherwise perhaps.Then must avoid if this occurs, will readjust chromaticity coordinates this moment, only do not preserve the result who adjusts again under the situation of brightness upset appears in complete white image.
This mode in the present embodiment can be carried out the colour temperature adjustment at each GTG, can adjust the deviation of the colour temperature of display device comparatively exactly, thereby obtains good display.And the method in the present embodiment has been also noted that the phenomenon of avoiding occurring the brightness upset, has guaranteed the rationality of display effect.
Below the system of the correcting color temperature of display device in the present embodiment is made an explanation, as shown in Figure 3, Fig. 3 is the synoptic diagram according to the system architecture of the correcting color temperature of display device in the embodiment of the invention again.
Corrective system 30 among Fig. 3 comprises output unit 32, measurement mechanism 34 and calculation element 36, the colour temperature that is used for proofreading and correct display device 38, and wherein output unit 32, measurement mechanism 34 are connected with display device 38.
Output unit 32 is used for sending the information of images and the adjustment result of calculation element 36 being sent to display device 38 to display device 38; Measurement mechanism 34 is used for detecting the chromaticity coordinates and the colour temperature of this image that display device 38 shows under the situation of image for the complete white image of selected gray scale that output unit 32 sends; Calculation element 36 is used for adjusting display device 38 in the gray scale of the R of current gray level and/or the gray scale of B according to measurement mechanism 34 detected chromaticity coordinatess, when the colour temperature of the complete white image of adjusting 38 demonstrations of back display device is in setting range, current adjustment result is sent to output unit 32.
Corrective system 30 among Fig. 3 can also be taken the phenomenon of brightness upset into consideration and carry out color temperature correction.Specifically be that measurement mechanism 34 also is used for detecting the brightness of this image that display device 38 shows under the situation of image for the complete white image of selected gray scale that output unit 32 sends; Calculation element 36 also is used for adjusting display device 38 in the gray scale of the R of current gray level and/or the gray scale of B according to measurement mechanism 34 detected chromaticity coordinatess, satisfy when pre-conditioned when the colour temperature of adjusting the complete white image that back display device 38 shows is in setting range and brightness that should complete white image, current adjustment result is sent to display device 38.Here pre-conditioned can be to need the various conditions investigated, wherein can comprise the investigation for the brightness flop phenomenon.
As can be seen from the above description, use the technical scheme of present embodiment, adjust the chromaticity coordinates of display device each gray scale in the GTG system, make the colour temperature of each gray scale near desired color temperature, this mode can be adjusted the deviation of the colour temperature of display device comparatively exactly, thereby obtains good display.And the method in the present embodiment has been also noted that the phenomenon of avoiding occurring the brightness upset, has guaranteed the rationality of display effect.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the memory storage and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the method for a correcting color temperature of display device is characterized in that, comprising:
Step a, the described display device of control make it to show the complete white image of the first selected gray scale;
The chromaticity coordinates and the colour temperature of the described complete white image that step b, the described display device of detection show;
Step c, adjust described display device in the gray scale of the R of current gray level and/or the gray scale of B according to described chromaticity coordinates, when the colour temperature of the described complete white image of adjusting the described display device demonstration in back is in setting range, preserve current adjustment result corresponding to described selected gray scale.
2. method according to claim 1 is characterized in that,
Before described step a, also comprise: a plurality of selected gray scale of from GTG ratio, selecting to comprise the first selected gray scale;
Also comprise after described step c: repeatedly carry out described step a, step b and step c successively, selected gray scale and the selected gray scale among the executed step a during wherein each execution in step a are inequality.
3. the method for a correcting color temperature of display device is characterized in that, comprising:
Step a, the described display device of control make it to show the complete white image of the first selected gray scale;
Chromaticity coordinates, colour temperature and the brightness of the described complete white image that step b, the described display device of detection show;
Step c, adjust described display device in the gray scale of the R of current gray level and/or the gray scale of B according to described chromaticity coordinates, the brightness that is in setting range and described complete white image when the colour temperature of adjusting the described complete white image that the described display device in back shows is satisfied when pre-conditioned, preserves current adjustment result corresponding to described selected gray scale.
4. method according to claim 1 is characterized in that,
Before described step a, also comprise: a plurality of selected gray scale of from GTG ratio, selecting to comprise the first selected gray scale;
Also comprise after described step c: repeatedly carry out described step a, step b and step c successively, selected gray scale and the selected gray scale among the executed step a during wherein each execution in step a are inequality.
5. method according to claim 4 is characterized in that, described pre-conditioned comprising: the brightness flop phenomenon does not appear in the described complete white image that described display device shows.
6. the system of a correcting color temperature of display device is characterized in that, comprises output unit, measurement mechanism and calculation element, wherein:
Described output unit is used for sending the information of image and the adjustment result of described calculation element being sent to described display device to display device;
Described measurement mechanism is used for detecting the chromaticity coordinates and the colour temperature of this image that described display device shows under the situation of image for the complete white image of selected gray scale that described output unit sends;
Described calculation element, be used for adjusting described display device in the gray scale of the R of current gray level and/or the gray scale of B according to the detected chromaticity coordinates of described measurement mechanism, when the colour temperature of the described complete white image of adjusting the described display device demonstration in back is in setting range, current adjustment result is sent to described output unit.
7. system according to claim 6 is characterized in that,
Described measurement mechanism also is used for detecting the brightness of this image that described display device shows under the situation of image for the complete white image of selected gray scale that described output unit sends;
Described calculation element also is used for adjusting described display device in the gray scale of the R of current gray level and/or the gray scale of B according to the detected chromaticity coordinates of described measurement mechanism, the brightness that is in setting range and described complete white image when the colour temperature of adjusting the described complete white image that the described display device in back shows is satisfied when pre-conditioned, and current adjustment result is sent to described display device.
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| CN114283760A (en) * | 2020-09-27 | 2022-04-05 | 京东方科技集团股份有限公司 | Color temperature curve correction method, system, equipment and medium |
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Application publication date: 20101124 |