CN101996612A - Correction method for enhancing brightness uniformity of display device and relevant device - Google Patents
Correction method for enhancing brightness uniformity of display device and relevant device Download PDFInfo
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Abstract
The invention relates to a correction method for enhancing the brightness uniformity of a display device and a relevant device. The correction method is used for enhancing the brightness uniformity of the display device, the display device comprises a plurality of sampling points, the correction method comprises the following steps of: controlling the display device to display a plurality of images which correspond to a plurality of grey-scale values; detecting the brightness of each sampling point corresponding to each image to obtain a plurality of first brightness signals corresponding to each sampling point; converting a plurality of first brightness signals corresponding to each sampling point into a plurality of second brightness signals according to a conversion function; determining one linear correction function corresponding to each sampling point according to a plurality of second brightness signals corresponding to each sampling point and a plurality of grey-scale values; and correcting the output brightness of each sampling point according to the linear correction function corresponding to each sampling point.
Description
Technical field
The present invention relates to a kind of bearing calibration and relevant apparatus that is used for promoting the brightness uniformity of display device, particularly relate to a kind of bearing calibration and relevant apparatus that reduces luminance errors and significantly reduce the brightness uniformity of gamma correction time.
Background technology
Along with the continuous development of video signal science and technology, high image quality and high-resolution liquid crystal indicator or plasma display etc. extensively are subjected to attracting attention of everybody.For making display device present good image quality, display device also must be accomplished perfection to the homogeneity of picture brightness the consistance of brightness (or be called) as far as possible except must demonstrating good chromaticity.With the liquid crystal indicator is example, if examine a liquid crystal indicator without gamma correction with naked eyes, ordinary person can find easily that zone in the liquid crystal indicator and the brightness between the zone are not quite similar.Secondly, if reality is measured with photometer, then can find different pixels when performance same gray level data, its actual brightness value that is measured and inhomogeneous, during especially as if zone line that compares picture and fringe region, can observe bigger luminance difference usually.In this case,, must when product design, add the circuit that can supply gamma correction, and in the production run of display device, add rigorous gamma correction program for the brightness uniformity that makes display device can reach certain standard.
Generally speaking, the brightness correcting method that is used for display device in the prior art only carries out actual brightness measurement and correction at single GTG.For instance, the display device that has 256 GTGs with luminance signal is an example, and gamma correction program of the prior art generally is to carry out gamma correction and compensation between pixel and the pixel at wherein middle GTG (GTG value=128).Thus, this kind brightness correcting method only can guarantee the consistance of single GTG brightness between pixel and the pixel, and shows through the experimental measurement result, generally still has to surpass 20% luminance errors.Therefore, in order to make high-quality display device (luminance errors is in 10%), more accurate and believable gamma correction is real to be indispensable step.
Be example again with the liquid crystal indicator, because the Luminance Distribution of back lighting device is even inadequately, and the difference that is used for driving liquid crystal optics characteristic in the magnitude of voltage of pixel and the pixel, the brightness performance of liquid crystal indicator definitely can't reach good consistance, therefore need be by other method compensation, make the brightness can be even.Please refer to Fig. 1, Fig. 1 is the configuration diagram of a luminance correction device 10 of prior art.Luminance correction device 10 is used for a display device MONITOR1 is carried out gamma correction, and it includes an image control module 100, an amount of brightness measurement unit 102 and a gamma correction unit 104.Image control module 100 is used for controlling the picture of display device MONITOR1 demonstration corresponding to specific grey-scale, and amount of brightness measurement unit 102 is used for measuring the brightness of specific assignment sampling point, and gamma correction unit 104 then is used for proofreading and correct the output brightness of specific assignment sampling point.
Please refer to Fig. 2, Fig. 2 be the display device MONITOR1 of Fig. 1 when showing the signal of a same gray level, the brightness synoptic diagram that picture institute practical manifestation goes out.When the shown GTG of the image control module 100 whole pictures of control is 128, center section pixel PIXEL_A is measured via amount of brightness measurement unit 102, the brightness value of its gained is defined as 128 after calibration, the brightness value of edge part pixel PIXEL_B and PIXEL_C then is respectively values not of uniform size such as 90 or 100 in regular turn.Therefore, if gamma correction unit 104 is that 128 value is done gamma correction at single GTG, can be benchmark then, and pixel PIXEL_B and PIXEL_C are increased grey jump δ E1 and δ E2 respectively with as intensity correction values with pixel PIXEL_A.In other words, 128+ δ E1 and 128+ δ E2 are the brightness new GTG values consistent with the brightness of pixel PIXEL_A that makes pixel PIXEL_B and PIXEL_C respectively.Thus, when the GTG of correction reference is 128, if make the GTG value of PIXEL_B and PIXEL_C add intensity correction values, then can make the brightness of pixel PIXEL_B and PIXEL_C and pixel PIXEL_A have same brightness as reference point.Bearing calibration according to this, (with Fig. 2 is example to all pixels corresponding to certain single GTG, this moment, GTG was 128) corrected value (for example: δ E1, δ E2 etc.), all can be measured and calculate each pixel in the picture according to above-mentioned steps is 128 o'clock intensity correction values with respect to GTG.Secondly, the intensity correction values of all pixels can be concentrated in the storer that is stored in the display device MONITOR1, in order to when normal mode is operated, display device MONITOR1 just can be shown earlier with the corrected value addition of being deposited in input signal and pairing GTG value and the storer again.Therefore, at this single GTG, display device MONITOR1 just can demonstrate the picture of brightness unanimity.
In addition, can both carry out gamma correction in order to make all GTGs of display device MONITOR1, prior art also has based on above-mentioned single gray scale correction, and with the function corresponding relation between curve emulation brightness and the GTG.Display device MONITOR1 and when normal mode is operated according to this curvilinear function, calculates the corrected value of other GTG, to carry out the function of gamma correction.Yet this curve in order to corresponding relation between definition brightness and the GTG is not to be obtained from actual measurement, but dependence experience and conjecture, therefore by there being bigger error between resulting corrected value of curvilinear function and the actual value often.
In brief, above-mentioned gray scale correction method is only done actual measurement and correction at single GTG, and must measure one by one and proofread and correct all pixels.According to prior art, the pixel that the single display device is comprised surpasses 1,000,000 easily, if one by one each pixel is measured and proofreaies and correct, the required time of correction of then finishing a display device will be very long, even reach tens of hours, directly influence production efficiency.In addition, storer is in order to store the corrected value of all pixels, and its spent storage space is very huge, and cost is also higher relatively.
Summary of the invention
Therefore, fundamental purpose of the present invention promptly is to provide a kind of bearing calibration and relevant apparatus that is used for promoting the brightness uniformity of a display device.
The present invention discloses a kind of bearing calibration that is used for promoting the brightness uniformity of a display device, and this display device comprises a plurality of sampling spots, and this bearing calibration includes this display device of control and shows a plurality of pictures, and these a plurality of pictures are corresponding to a plurality of GTG values; Detect of the brightness of each sampling spot, to obtain a plurality of first luminance signals corresponding to each sampling spot corresponding to each picture; According to a transfer function, will be converted into a plurality of second luminance signals corresponding to a plurality of first luminance signals of each sampling spot; According to these a plurality of second luminance signals and these a plurality of GTG values corresponding to each sampling spot, decision is corresponding to a linearity correction function of each sampling spot; And according to this linearity correction function corresponding to each sampling spot, the output brightness of proofreading and correct each sampling spot.
The present invention also discloses a kind of means for correcting of brightness uniformity of enhancement one display device, this display device comprises a plurality of sampling spots, this means for correcting includes an image control module, shows a plurality of pictures in order to control this display device, and these a plurality of pictures are corresponding to a plurality of GTG values; One amount of brightness measurement unit is in order to detect the brightness of each sampling spot corresponding to each picture, to obtain a plurality of first luminance signals corresponding to each sampling spot; One signal conversion unit is coupled to this amount of brightness measurement unit, in order to according to a transfer function, will be converted into a plurality of second luminance signals corresponding to a plurality of first luminance signals of each sampling spot; One function decision unit is coupled to this signal conversion unit and this image control module, in order to according to these a plurality of second luminance signals and these a plurality of GTG values corresponding to each sampling spot, determines the linearity correction function corresponding to each sampling spot; And a gamma correction unit, be coupled to this function decision unit, in order to according to this linearity correction function corresponding to each sampling spot, the output brightness of proofreading and correct each sampling spot.
Description of drawings
Fig. 1 is the configuration diagram of a luminance correction device of prior art.
Fig. 2 be the display device of Fig. 1 when showing the signal of a same gray level, the brightness synoptic diagram that picture institute practical manifestation goes out.
Fig. 3 is the configuration diagram of the embodiment of the invention one means for correcting.
Fig. 4 A to Fig. 4 C is the synoptic diagram of the pairing linearity correction function of two different sampling spots.
Fig. 5 A and Fig. 5 B are a sampling spot distribution schematic diagram of the present invention.
Fig. 6 is the synoptic diagram of a correcting process of the embodiment of the invention.
The reference numeral explanation
10 luminance correction devices
100 image control modules
102 amount of brightness measurement units
104 gamma correction unit
δ E1, δ E2 ash jump
MONITOR1, MONITOR2 display device
PIXEL_A, PIXEL_B, PIXEL_C pixel
60 correcting process
62,64,66,68,70,72,74 steps
30 means for correctings
600 image control modules
602 amount of brightness measurement units
604 signal conversion units
606 functions decision unit
608 gamma correction unit
Embodiment
Please refer to Fig. 3, Fig. 3 is the configuration diagram of the embodiment of the invention one means for correcting 30.Means for correcting 30 is used for a display device MONITOR2 is carried out gamma correction, to promote its brightness uniformity.Display device MONITOR2 includes a plurality of default sampling spot SP_1～SP_M, and is distributed in fifty-fifty on the screen of display device MONITOR2.Means for correcting 30 includes an image control module 600, an amount of brightness measurement unit 602, a signal conversion unit 604, function decision unit 606 and a gamma correction unit 608.Image control module 600 is used for controlling display device MONITOR2 display frame PIC_1～PIC_N, and picture PIC_1～PIC_N is corresponding to GTG value GL_1～GL-K.Amount of brightness measurement unit 602 is used for detecting the brightness of sampling spot SP_1～SP_M corresponding to each picture PIC_1～PIC_N, to obtain the luminance signal LO_1～LO_M corresponding to sampling spot SP_1～SP_M.Signal conversion unit 604 is used for according to a transfer function LOG, will be converted into luminance signal NL_1～NL_M corresponding to luminance signal LO_1～LO_M of sampling spot SP_1～SP_M.Function decision unit 606 is used for according to luminance signal NL_1～NL_M and GTG value GL_1～GL_K corresponding to sampling spot SP_1～SP_M, and decision is corresponding to linearity correction function G C_1～GC_M of sampling spot SP_1～SP_M.Gamma correction unit 608 is used for proofreading and correct the output brightness of sampling spot SP_1～SP_M according to the linearity correction function G C_1～GC_M corresponding to sampling spot SP_1～SP_M.
In simple terms, after amount of brightness measurement unit 602 is obtained luminance signal LO_1～LO_M corresponding to sampling spot SP_1～SP_M, signal conversion unit 604 is by transfer function LOG, to be converted into luminance signal NL_1～NL_M corresponding to luminance signal LO_1～LO_M of sampling spot SP_1～SP_M, the GTG value GL_1～GL_K that cooperates raw frames again is by the linearity correction function G C_1～GC_M of function decision unit 606 decisions corresponding to sampling spot SP_1～SP_M.By this, the output brightness of sampling spot SP_1～SP_M can be proofreaied and correct according to the linearity correction function of each sampling spot in gamma correction unit 608.Preferably, transfer function LOG is a logarithm function (logarithmic function), when GTG and brightness are finished coordinate conversion respectively, can make mathematical relation between the two be converted into a kind of linear relationship.Thus, will make the complexity of the funtcional relationship between GTG and the brightness greatly reduce.For example, function decision unit 606 can use the best to join legitimacy (best fit method) and determine the parameter value that the linearity correction function of each sampling spot is comprised, or the mode of use linear interpolation (linear interpolation), set up the brightness look-up table (Gamma table) that is specific to all GTG values of pixels sampled SP 1～SP M.Therefore, the present invention need not carry out full GTG and measure, and can obtain the correction result of high precision equally.
Specifically, the common available exponential function of the brightness of display device MONITOR2 and the corresponding relation between the GTG is represented.Yet,, therefore can't directly derive accurate full GTG brightness look-up table with the mode of linear interpolation because exponential function is a nonlinear function.Otherwise if use logarithmic function respectively coordinate conversion to be carried out in brightness and GTG, the corresponding relation that then can make brightness and GTG is transformed into a linear function by original exponential function.
In addition, for conveniently carrying out gamma correction, the operator of means for correcting 30 can be by choosing a sampling spot as benchmark pixel SSP among sampling spot SP_1～SP_M, the benchmark when making remaining sampling spot carry out correcting luminance with the linearity correction function of benchmark pixel SSP as remaining sampling spot.In addition, the method for the full GTG intensity correction values of deriving still must be decided according to the relativeness of the linearity correction function of the linearity correction function of benchmark pixel and other pixels sampled.About different linearity correction function relativenesses therebetween, below be illustrated with three kinds of situations of Fig. 4 A to Fig. 4 C.Wherein, Fig. 4 A to Fig. 4 C is all the synoptic diagram of the pairing linearity correction function of two different sampling spots.
Situation one
Shown in Fig. 4 A, the linearity correction function of benchmark pixel and the linearity correction function of other pixels sampled are parallel relation.Subsidiary one what carry is that the shown situation of Fig. 4 A is a kind of more common situation.In the case, the linearity correction function of benchmark pixel SSP (curve A 1) is identical with the slope of the linearity correction function (curve B 1) of other pixel.For curve B is overlapped with curve A, can derive the gap (δ E) between its relative GTG value and the adjusted new GTG value, and curve B and curve A are coincided together via the luminance difference of calculating specific grey-scale.In this way, calculate and set up the brightness look-up table of each pixels sampled rapidly.
Situation two
Shown in Fig. 4 B, the linearity correction function of benchmark pixel has different slopes and intercept with the linearity correction function of other pixel.In the case, the linearity correction function of benchmark pixel (curve A 2) is different with the slope of the linearity correction function (curve B 2) of other pixel, in order to derive the gap (δ E) between its relative GTG value and the adjusted new GTG value, so that curve A 2 can overlap with curve B 2, can use maximum gray (at this, maximum gray value=255) and the pairing brightness part of benchmark as a comparison, and with this calculate the brightness look-up table of each pixels sampled rapidly.
Situation three
Shown in Fig. 4 C, the linearity correction function almost parallel of the linearity correction function of benchmark pixel and other pixel, and slope does not have fixing.In the case, at first must select a GTG value GL_I, find brightness NL_I on its linearity correction function (curve A 3) corresponding to GTG value GL_I inferior to benchmark pixel, then according to this brightness NL_I on the linearity correction function (curve B 3) of other pixel, find GTG value GL_J corresponding to brightness NL_I.Step just can be derived the gap (δ E) between each relative GTG value and the adjusted new GTG value in regular turn according to this, and derives the brightness look-up table of each pixels sampled with this.
In addition, gamma correction unit 608 also can utilize the account form of weighted sum (weighted sum), according to the brightness look-up table of adjacent samples pixel, calculates the intensity correction values of pixels sampled with exterior pixel, makes each pixel in the picture all obtain gamma correction.That is to say that the present invention can proofread and correct the output brightness of display pixel other parts (pixel) in addition according to the linearity correction function corresponding to each sampling spot.Wherein, calculating the employed weighted value of weighted sum is that distance is bigger corresponding to the distance between pixel and the contiguous pixels sampled, and its pairing weighted value is littler, otherwise then bigger.
In sum, at first, it is benchmark pixel that the present invention selects a pixels sampled, make in the picture other pixel energy with benchmark pixel as calibration standard.When the measurement of pixels sampled (comprising benchmark pixel and other pixels sampled) via amount of brightness measurement unit 602, and obtain after 3～16 brightness and the relation between the GTG that do not wait, signal conversion unit 604 utilizes transfer function LOG to carry out coordinate conversion, with original exponential relationship between the brightness of pixel and the GTG, after coordinate conversion, in new coordinate, be transformed into linear relationship.Thus, function decision unit 606 just can utilize linear interpolation, derives that other becomes the exclusive linearity correction function of each pixels sampled without brightness and GTG relation that reality measures in each pixels sampled.Secondly, gamma correction unit 608 can be according to the linearity correction function of pixels sampled, compare with the linearity correction function of benchmark pixel, calculate and derive the brightness look-up table (Gamma Table) of the input GTG value that is used for adjusting pixels sampled, be used for making input GTG value via the brightness look-up table, produce new GTG value, and this new GTG value can make pixels sampled reach consistent effect with the brightness of benchmark pixel.In other words, the brightness of pixels sampled can approach the brightness of benchmark pixel and the funtcional relationship of input GTG as far as possible with respect to the funtcional relationship that is presented between the adjusted new GTG value.Generally speaking, the major function of means for correcting 30 is to derive each GTG value of each pixel and the relation (δ E) between the adjusted new GTG value.
In addition, it should be noted that means for correcting 30 also can be applicable to the gamma correction to solid color, such as three kinds of primary colors of the RGB in the display device (primary color) can use individually also this method to carry out the gamma correction of solid color.
In the prior art, owing to do not carry out coordinate conversion, make that the funtcional relationship between brightness and the GTG is not a kind of linear relationship, thereby be not suitable for the mode of the linear interpolation brightness look-up table of deriving.Therefore, prior art can only measure mode with reality, sets up complete brightness look-up table at each pixels sampled, so will make the actual measurement time draw oversizely, significantly improves production cost.Secondly, prior art also has with experience or based on the mode of guessing, according to the actual amount measured value of single or minority, add by experience and judge that the curve of gained is inserted in measurement reluctantly, so Chang Wufa sets up more accurate brightness look-up table.In comparison, disclosed means for correcting 30 both can make the measurement time significantly reduce, and can save the storage space that major part is used for storing the brightness look-up table, and obtained accurate gamma correction result.
In addition, for promoting the efficient of brightness correcting function, the present invention is according to certain regularity of distribution when selecting sampling spot.Please refer to Fig. 5 A and Fig. 5 B, Fig. 5 A and Fig. 5 B are according to a sampling spot distribution schematic diagram of the present invention.It should be noted that submarginal part in Fig. 5 B, there is certain interval at sampling spot and edge, thus, can make the error in measurement of amount of brightness measurement unit 602 drop to minimum.
The function mode of means for correcting 30 can reduce a correcting process 60, as shown in Figure 6.Correcting process 60 includes following steps:
Step 62: beginning.
Step 64: image control module 600 control display device MONITOR2 show the picture PIC_1～PIC_N corresponding to GTG value GL_1～GL_K.
Step 66: amount of brightness measurement unit 602 detects the brightness of sampling spot SP_1～SP_M corresponding to picture PIC_1～PIC_N, to obtain the luminance signal LO_1～LO_M corresponding to sampling spot SP_1～SP_M.
Step 68: signal conversion unit 604 will be converted into luminance signal NL_1～NL_M corresponding to luminance signal LO_1～LO_M of sampling spot SP_1～SP_M according to transfer function LOG.
Step 70: function decision unit 606 is according to luminance signal NL_1～NL_M and GTG value GL_1～GL_K corresponding to sampling spot SP_1～SP_M, and decision is corresponding to linearity correction function G C_1～GC_M of sampling spot SP_1～SP_M.
Step 72: the output brightness of sampling spot SP_1～SP_M is proofreaied and correct according to the linearity correction function G C_1～GC_M corresponding to sampling spot SP_1～SP_M in gamma correction unit 608.
Step 74: finish.
Generally speaking, disclosed brightness correcting method and device, can measure a specific quantity (about 3～16 s') brightness and GTG relation in each pixels sampled, carry out coordinate conversion via a transfer function, make original exponential relationship between brightness and the GTG, after coordinate conversion, be transformed into linear relationship, and, set up the brightness look-up table of each pixels sampled fast in the linear interpolation mode.And the present invention can further utilize the account form of weighted sum (weighted sum), according to the brightness look-up table of adjacent samples pixel, calculates the intensity correction values of pixels sampled with exterior pixel, makes each pixel in the picture all obtain gamma correction.
According to the related experiment result, via the brightness look-up table of gained of the present invention, error all can remain on below 10% after the correction of its brightness.In addition, the required gamma correction time of each display device also can shorten to several minutes to tens of hours by a few hours, and its economic benefit is very apparent.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (14)
1. bearing calibration of promoting the brightness uniformity of a display device, this display device comprises a plurality of sampling spots, and this bearing calibration includes:
Control this display device and show a plurality of pictures, these a plurality of pictures are corresponding to a plurality of GTG values;
Detect of the brightness of each sampling spot, to obtain a plurality of first luminance signals corresponding to each sampling spot corresponding to each picture;
According to a transfer function, will be converted into a plurality of second luminance signals corresponding to a plurality of first luminance signals of each sampling spot;
According to these a plurality of second luminance signals and these a plurality of GTG values corresponding to each sampling spot, decision is corresponding to a linearity correction function of each sampling spot; And
According to this linearity correction function corresponding to each sampling spot, the output brightness of proofreading and correct each sampling spot.
2. bearing calibration as claimed in claim 1, wherein this transfer function is a logarithm function.
3. bearing calibration as claimed in claim 1, wherein according to these a plurality of second luminance signals corresponding to each sampling spot, decision is corresponding to this linearity correction function of each sampling spot, be according to corresponding to this a plurality of second luminance signals of each sampling spot, join the parameter value that legitimacy determines that this linearity correction function corresponding to each sampling spot is comprised with the best.
4. bearing calibration as claimed in claim 1, wherein these a plurality of sampling spots are the parts corresponding to a viewing area of this display device.
5. bearing calibration as claimed in claim 4, it also includes according to this linearity correction function corresponding to each sampling spot, proofreaies and correct the output brightness of the other parts of this viewing area.
6. bearing calibration as claimed in claim 1, wherein these a plurality of sampling spots are corresponding to the part of a plurality of display pixels of this display device.
7. bearing calibration as claimed in claim 6, it also includes according to this linearity correction function corresponding to each sampling spot, proofreaies and correct the output brightness of the other parts of these a plurality of display pixels.
8. means for correcting of promoting the brightness uniformity of a display device, this display device comprises a plurality of sampling spots, and this means for correcting includes:
One image control module shows a plurality of pictures in order to control this display device, and these a plurality of pictures are corresponding to a plurality of GTG values;
One amount of brightness measurement unit is in order to detect the brightness of each sampling spot corresponding to each picture, to obtain a plurality of first luminance signals corresponding to each sampling spot;
One signal conversion unit is coupled to this amount of brightness measurement unit, in order to according to a transfer function, will be converted into a plurality of second luminance signals corresponding to a plurality of first luminance signals of each sampling spot;
One function decision unit is coupled to this signal conversion unit and this image control module, in order to according to these a plurality of second luminance signals and these a plurality of GTG values corresponding to each sampling spot, determines the linearity correction function corresponding to each sampling spot; And
One gamma correction unit is coupled to this function decision unit, in order to basis this linearity correction function corresponding to each sampling spot, the output brightness of proofreading and correct each sampling spot.
9. means for correcting as claimed in claim 8, wherein this transfer function is a logarithm function.
10. correction side as claimed in claim 8 device, wherein this function decision unit is used for according to this a plurality of second luminance signals corresponding to each sampling spot, joins the parameter value that legitimacy determines that this linearity correction function corresponding to each sampling spot is comprised with the best.
11. means for correcting as claimed in claim 8, wherein these a plurality of sampling spots are corresponding to the part of a viewing area of this display device.
12. means for correcting as claimed in claim 11, wherein this gamma correction unit also is used for proofreading and correct the output brightness of the other parts of this viewing area according to this linearity correction function corresponding to each sampling spot.
13. means for correcting as claimed in claim 8, wherein these a plurality of sampling spots are corresponding to the part of a plurality of display pixels of this display device.
14. means for correcting as claimed in claim 13, wherein this gamma correction unit also is used for proofreading and correct the output brightness of the other parts of these a plurality of display pixels according to this linearity correction function corresponding to each sampling spot.
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| CN106782422A (en) * | 2017-03-23 | 2017-05-31 | 南京巨鲨显示科技有限公司 | A kind of full frame digital brightness balanced device of liquid crystal display and its bearing calibration |
| WO2019037176A1 (en) * | 2017-08-25 | 2019-02-28 | 惠科股份有限公司 | Method and device for optimizing brightness compensation |
| US10510289B2 (en) | 2017-08-25 | 2019-12-17 | HKC Corporation Limited | Optimization method and device for brightness compensation |
| CN108962184A (en) * | 2018-06-22 | 2018-12-07 | 苏州佳世达电通有限公司 | Bearing calibration, sampling display device and the correcting display device of display device |
| CN108962184B (en) * | 2018-06-22 | 2021-08-03 | 苏州佳世达电通有限公司 | Display device calibration method, sampling display device and calibration display device |
| CN109712579A (en) * | 2018-11-29 | 2019-05-03 | 青岛海信电器股份有限公司 | A kind of calibration method and device of brightness measurement |
| CN112581912A (en) * | 2019-09-29 | 2021-03-30 | 上海和辉光电有限公司 | Display compensation method, display compensation device and electronic equipment |
| CN110796979A (en) * | 2019-11-14 | 2020-02-14 | 华兴源创(成都)科技有限公司 | Driving method and driving device of display panel |
| CN112599074A (en) * | 2020-05-28 | 2021-04-02 | 西安诺瓦星云科技股份有限公司 | Display module correction method, device and system and display screen correction method and device |
| CN113889036A (en) * | 2021-10-13 | 2022-01-04 | 合肥维信诺科技有限公司 | Method for determining compensation gray scale value, compensation method, compensation device, compensation equipment and compensation medium |
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Application publication date: 20110330 |