CN107068076A - The adjusting method and system of brightness of display screen uniformity - Google Patents

The adjusting method and system of brightness of display screen uniformity Download PDF

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Publication number
CN107068076A
CN107068076A CN201611271539.6A CN201611271539A CN107068076A CN 107068076 A CN107068076 A CN 107068076A CN 201611271539 A CN201611271539 A CN 201611271539A CN 107068076 A CN107068076 A CN 107068076A
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image
pixel
low
value
frequency
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王甜甜
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Shenzhen TCL New Technology Co Ltd
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Shenzhen TCL New Technology Co Ltd
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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
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The invention discloses a kind of adjusting method of brightness of display screen uniformity and system, this method includes：Under brightness of display screen uniformity shaping modes, liquid crystal display output test image for low-and high-frequency processing terminal collecting test image, and sends low-frequency compensation image and high frequency compensation image according to test image and sample image to liquid crystal display；Liquid crystal display parsing the low-frequency compensation image and high frequency compensation image that receive, obtain in low-frequency compensation image the corresponding high frequency compensation value of each pixel in the corresponding low-frequency compensation value of each pixel and high frequency compensation image；Liquid crystal display adjusts the brightness value in display screen with test image same position pixel according to low-frequency compensation value and high frequency compensation value, to adjust the uniformity of display screen display brightness.The present invention is realized while brightness of display screen inhomogeneities is eliminated, and improves the display effect of display screen.

Description

The adjusting method and system of brightness of display screen uniformity
Technical field
The present invention relates to the adjusting method and system of display technology field, more particularly to a kind of brightness of display screen uniformity.
Background technology
With the fast development of liquid crystal display technology, in order that the picture that the display screen for obtaining liquid crystal display is shown Become apparent from, the uniformity requirement more and more higher for the brightness that people show to display screen.At present, in order to improve brightness of display screen Inhomogeneities, generally by the driving current of the display pixel three-color light-emitting diode of control display screen, to reach that control is aobvious The purpose of brightness ratio between the identical primary colours of display pixel of display screen, realizes the regulation to brightness of display screen uniformity, still, By way of such a regulation brightness of display screen uniformity the LED component of liquid crystal display will be caused chroma offset occur, So that the display effect of display screen is worse.
The content of the invention
It is a primary object of the present invention to provide the adjusting method and system of a kind of brightness of display screen uniformity, it is intended to eliminate While brightness of display screen inhomogeneities, improve the display effect of display screen.
To achieve the above object, a kind of adjusting method for brightness of display screen uniformity that the present invention is provided, the display screen The adjusting method of brightness uniformity comprises the following steps：
Under brightness of display screen uniformity shaping modes, liquid crystal display output test image, for low-and high-frequency processing Terminal gathers the test image, and sends low-frequency compensation figure to liquid crystal display according to the test image and sample image Picture and high frequency compensation image, wherein, the figure that the test image is exported when uneven for the brightness of display screen of liquid crystal display Picture, the sample image is the image exported when brightness of display screen is uniform；
Low-frequency compensation image and high frequency compensation image that liquid crystal display parsing is received, are obtained in low-frequency compensation image The corresponding high frequency compensation value of each pixel in the corresponding low-frequency compensation value of each pixel and high frequency compensation image；
Liquid crystal display according to low-frequency compensation value and high frequency compensation value adjust in display screen with test image identical bits The brightness value of pixel is put, to adjust the uniformity of display screen display brightness.
Preferably, the liquid crystal display according to low-frequency compensation value and high frequency compensation value adjust in display screen with test The step of brightness value of image same position pixel, includes：
Liquid crystal display is respectively by the corresponding low-frequency compensation value of each pixel in low-frequency compensation image and test image The pixel value of middle same position pixel is overlapped, and obtains the corresponding low frequency regulated value of the pixel of each in test image, and Respectively by the picture of same position pixel in the corresponding high frequency compensation value of each pixel in high frequency compensation image and test image Plain value is overlapped, and obtains the corresponding high frequency regulated value of the pixel of each in test image；
Liquid crystal display according to low frequency regulated value and high frequency regulated value set in display screen with test image identical bits Put the brightness value of pixel.
Preferably, the liquid crystal display according to low frequency regulated value and high frequency regulated value set in display screen with test The step of brightness value of image same position pixel, includes：
Liquid crystal display is respectively by the corresponding low frequency regulated value of the pixel of each in test image and high frequency regulated value It is overlapped, obtains the corresponding low-and high-frequency regulated value of the pixel of each in test image；
Liquid crystal display calculates the average value of low-and high-frequency regulated value, and sets aobvious according to the average value of low-and high-frequency regulated value With the brightness value of test image same position pixel in display screen.
To achieve the above object, the present invention provides a kind of adjusting method of brightness of display screen uniformity, the display screen again The adjusting method of brightness uniformity comprises the following steps：
The sample image that the brightness of display screen of low-and high-frequency processing terminal collection liquid crystal display is exported when uniform, Yi Jixian The test image exported during display screen brightness irregularities；
When the brightness of display screen for detecting liquid crystal display is uneven, low-and high-frequency processing terminal passes through high-pass filter And low pass filter is filtered to test image respectively, the High frequency filter image and LPF after high-pass filtering are obtained Low frequency filtering image afterwards；
Low-and high-frequency processing terminal calculates the difference of the pixel value of sample image and the pixel value of High frequency filter image, obtains high Frequency compensation image, and the difference of the pixel value of sample image and the pixel value of low frequency filtering image is calculated, obtain low-frequency compensation figure Picture；
Low-and high-frequency processing terminal sends high frequency compensation image and low-frequency compensation image to liquid crystal display, for liquid crystal Display device is based on high frequency compensation image and low-frequency compensation image adjustment brightness of display screen uniformity.
Preferably, the pixel value and the pixel value of High frequency filter image of the low-and high-frequency processing terminal calculating sample image Difference, obtains high frequency compensation image, and calculates the difference of the pixel value of sample image and the pixel value of low frequency filtering image, obtains The step of taking low-frequency compensation image includes：
Low-and high-frequency processing terminal calculates the pixel value of each pixel of sample image and phase in low frequency filtering image respectively With the difference of the pixel value of position pixel, each pixel in low-frequency compensation image and low-frequency compensation image is obtained corresponding Low-frequency compensation value, and the pixel value and same position pixel in High frequency filter image of each pixel of sample image are calculated respectively The difference of the pixel value of point, obtains the corresponding high frequency compensation of each pixel in high frequency compensation image and high frequency compensation image Value.
In addition, to achieve the above object, the present invention also provides a kind of regulating system of brightness of display screen uniformity, described aobvious The regulating system of display screen brightness uniformity includes liquid crystal display and low-and high-frequency processing terminal, wherein, the liquid crystal display Equipment includes：
Output module, under brightness of display screen uniformity shaping modes, exporting test image, for low-and high-frequency processing Terminal gathers the test image, and sends low-frequency compensation figure to liquid crystal display according to the test image and sample image Picture and high frequency compensation image, wherein, the figure that the test image is exported when uneven for the brightness of display screen of liquid crystal display Picture, the sample image is the image exported when brightness of display screen is uniform；
Acquisition module, for parsing the low-frequency compensation image and high frequency compensation image that receive, obtains low-frequency compensation image In the corresponding high frequency compensation value of each pixel in the corresponding low-frequency compensation value of each pixel and high frequency compensation image；
Adjustment module, for according to low-frequency compensation value and high frequency compensation value adjust in display screen with test image identical bits The brightness value of pixel is put, to adjust the uniformity of display screen display brightness.
The low-and high-frequency processing terminal is used to send low-frequency compensation image and high frequency compensation image to liquid crystal display.
Preferably, the adjustment module includes：
Superpositing unit, for respectively by the corresponding low-frequency compensation value of each pixel in low-frequency compensation image and test image The pixel value of middle same position pixel is overlapped, and obtains the corresponding low frequency regulated value of the pixel of each in test image, and Respectively by the picture of same position pixel in the corresponding high frequency compensation value of each pixel in high frequency compensation image and test image Plain value is overlapped, and obtains the corresponding high frequency regulated value of the pixel of each in test image；
Setting unit, for according to low frequency regulated value and high frequency regulated value set in display screen with test image identical bits Put the brightness value of pixel.
Preferably, the setting unit includes：
Subelement is superimposed, for respectively adjusting the corresponding low frequency regulated value of the pixel of each in test image and high frequency Value is overlapped, and obtains the corresponding low-and high-frequency regulated value of the pixel of each in test image；
Subelement, the average value for calculating low-and high-frequency regulated value are set, and set according to the average value of low-and high-frequency regulated value Put the brightness value with test image same position pixel in display screen.
In addition, to achieve the above object, the present invention also provides the regulating system of brightness of display screen uniformity, the display again Shielding the regulating system of brightness uniformity includes liquid crystal display and low-and high-frequency processing terminal, wherein, the low-and high-frequency processing Terminal includes：
Acquisition module, the sample image that the brightness of display screen for gathering liquid crystal display is exported when uniform, Yi Jixian The test image exported during display screen brightness irregularities；
Filtration module, for when the brightness of display screen for detecting liquid crystal display is uneven, passing through high-pass filter And low pass filter is filtered to test image respectively, the High frequency filter image and LPF after high-pass filtering are obtained Low frequency filtering image afterwards；
Computing module, the difference for calculating the pixel value of sample image and the pixel value of High frequency filter image obtains high Frequency compensation image, and the difference of the pixel value of sample image and the pixel value of low frequency filtering image is calculated, obtain low-frequency compensation figure Picture；
Sending module, for high frequency compensation image and low-frequency compensation image to be sent to liquid crystal display, for liquid crystal Display device is based on high frequency compensation image and low-frequency compensation image adjustment brightness of display screen uniformity.
Preferably, the computing module also includes：
The pixel value and same position pixel in low frequency filtering image of each pixel of sample image are calculated respectively The difference of pixel value, obtains the corresponding low-frequency compensation value of each pixel in low-frequency compensation image and low-frequency compensation image, and The pixel value and the pixel value of same position pixel in High frequency filter image of each pixel of sample image are calculated respectively Difference, obtains the corresponding high frequency compensation value of each pixel in high frequency compensation image and high frequency compensation image.
The sample image that the brightness of display screen of low-and high-frequency processing terminal collection liquid crystal display of the present invention is exported when uniform, And brightness of display screen it is uneven when the test image that exports, under brightness of display screen uniformity shaping modes, liquid crystal display is set Standby output test image, so that low-and high-frequency processing terminal gathers the test image, and according to the test image and sample graph As sending low-frequency compensation image and high frequency compensation image, the low frequency that liquid crystal display parsing is received to liquid crystal display Image and high frequency compensation image are compensated, the corresponding low-frequency compensation value of each pixel and high frequency in low-frequency compensation image is obtained and mends Repay the corresponding high frequency compensation value of the pixel of each in image, according to low-frequency compensation value and high frequency compensation value adjust in display screen with The brightness value of test image same position pixel, to adjust the uniformity of display screen display brightness.Due to low-frequency compensation value and High frequency compensation value be the test image of liquid crystal display output pixel value and sample image pixel value difference, and export The display screen display brightness of another liquid crystal display of the sample image is uniform, therefore by by low-frequency compensation value and height Frequency offset is compensated into test image, to adjust the brightness value in display screen with test image same position pixel so that Export the display screen display brightness and another liquid crystal display of output sample image of the liquid crystal display of test image Display screen display brightness is consistent, so as to eliminate brightness of display screen inhomogeneities, improves the display effect of display screen.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the first embodiment of the adjusting method of brightness of display screen uniformity of the present invention；
Fig. 2 is the schematic diagram of a scenario of low-frequency compensation image of the present invention；
Fig. 3 is the schematic diagram of a scenario of high frequency compensation image of the present invention；
The schematic flow sheet for the refinement step that Fig. 4 is step S130 in first embodiment shown in Fig. 1 of the present invention；
Fig. 5 is the schematic diagram of a scenario that low frequency of the present invention adjusts image；
Fig. 6 is the schematic diagram of a scenario that high frequency of the present invention adjusts image；
Fig. 7 illustrates for the flow of step S132 refinement step in the adjusting method of brightness of display screen uniformity of the present invention Figure；
Fig. 8 is the schematic flow sheet of the second embodiment of the adjusting method of brightness of display screen uniformity of the present invention；
Fig. 9 is the schematic diagram of a scenario of sample image of the present invention；
Figure 10 is the schematic diagram of a scenario of test image of the present invention；
Figure 11 for brightness of display screen uniformity of the present invention regulating system in liquid crystal display first embodiment work( Can module diagram；
Figure 12 is adjusted in the second embodiment for liquid crystal display in the regulating system of brightness of display screen uniformity of the present invention Save the refinement high-level schematic functional block diagram of module；
Figure 13 is adjusted in the 3rd embodiment for liquid crystal display in the regulating system of brightness of display screen uniformity of the present invention Save the refinement high-level schematic functional block diagram of unit；
Figure 14 is the fourth embodiment of low-and high-frequency processing terminal in the regulating system of brightness of display screen uniformity of the present invention High-level schematic functional block diagram.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Based on above mentioned problem, the present invention provides a kind of adjusting method of brightness of display screen uniformity.
Reference picture 1, Fig. 1 illustrates for the flow of the first embodiment of the adjusting method of brightness of display screen uniformity of the present invention Figure.
In the present embodiment, the adjusting method of the brightness of display screen uniformity includes：
Step S110, under brightness of display screen uniformity shaping modes, liquid crystal display output test image, for height Low frequency processing terminal collecting test image, and low-frequency compensation figure is sent to liquid crystal display according to test image and sample image Picture and high frequency compensation image, wherein, the figure that the test image is exported when uneven for the brightness of display screen of liquid crystal display Picture, the sample image is the image exported when brightness of display screen is uniform；
In the present embodiment, it is each in the image of display screen output when liquid crystal display inputs uniform irradiation level The pixel value of color channel all pixels point is identical, and such as when liquid crystal display projects uniform light source, display screen is defeated Go out homogeneity picture, if the part existing defects being adjusted in liquid crystal display to inputting uniform irradiation level (are such as produced Material is poor used in CCD in liquid crystal display) so that the pixel of each color channel in the image of display screen output Pixel value it is different, cause the brightness value of each pixel in the display screen of liquid crystal display inconsistent, so as to cause display The brightness irregularities of screen.When the brightness of display screen uniformity of liquid crystal display is poor, tester can be to the liquid crystal display The brightness of display screen uniformity of equipment is adjusted, to eliminate the inhomogeneities of brightness of display screen.In brightness of display screen uniformity Under shaping modes, liquid crystal display output test image, for example, the display screen of liquid crystal display currently shows grey chromatic graph Picture, for low-and high-frequency processing terminal collecting test image.Low-and high-frequency processing terminal gathers the brightness of display screen of liquid crystal display The sample image exported when uniform, and brightness of display screen it is uneven when the test image that exports, wherein, the sample image is aobvious Display screen display brightness is uniform preferably another liquid crystal display output, and the low-and high-frequency processing terminal passes through high-pass filter And low pass filter is filtered to test image respectively, the High frequency filter image and LPF after high-pass filtering are obtained Low frequency filtering image afterwards, and the pixel value of sample image and the pixel value of High frequency filter image and low frequency filter are calculated respectively The difference of the pixel value of ripple image, obtain corresponding with High frequency filter image high frequency compensation image and with low frequency filtering image pair High frequency compensation image and low-frequency compensation image are sent to liquid crystal display and set by the low-frequency compensation image answered, low-and high-frequency processing terminal It is standby.
Step S120, low-frequency compensation image and high frequency compensation image that liquid crystal display parsing is received, obtains low frequency Compensate in image that the corresponding high frequency of each pixel is mended in the corresponding low-frequency compensation value of each pixel and high frequency compensation image Repay value；
When liquid crystal display receives the low-frequency compensation image and high frequency compensation image of the transmission of low-and high-frequency processing terminal, Parse low-frequency compensation image and high frequency compensation image, obtain in low-frequency compensation image the corresponding low-frequency compensation value of each pixel with And the corresponding high frequency compensation value of each pixel in high frequency compensation image.
With reference to Fig. 2 and Fig. 3, for the description of image, low-frequency compensation image A1 measurements of the chest, waist and hips spatial image as shown in B1, its In, measurements of the chest, waist and hips spatial image B1 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, low-frequency compensation image A1 The heavier place of middle shade, represents that the frequency of pixel is lower, is reflected on measurements of the chest, waist and hips spatial image B1 and understands, the lower picture of frequency Vegetarian refreshments spoke value is smaller, the lighter place of shade in low-frequency compensation image A1, represents that the frequency of pixel is higher, is reflected in measurements of the chest, waist and hips Understood on spatial image B1, the higher pixel spoke value of frequency is bigger；High frequency compensation image A2 measurements of the chest, waist and hips spatial image such as B2 It is shown, wherein, measurements of the chest, waist and hips spatial image B2 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, the high frequency compensation The lighter place of shade in image A2, represents that the frequency of pixel is higher, is reflected on measurements of the chest, waist and hips spatial image B2 and understands, frequency is got over High pixel spoke value is bigger, the heavier place of shade in high frequency compensation image A2, represents that the frequency of pixel is smaller, reflection Understood on measurements of the chest, waist and hips spatial image B2, the smaller pixel spoke value of frequency is smaller.
Step S130, liquid crystal display according to low-frequency compensation value and high frequency compensation value adjust in display screen with test chart As the brightness value of same position pixel, to adjust the uniformity of display screen display brightness.
Liquid crystal display repays low-frequency compensation value and high frequency compensation value complement in test image, with adjust in display screen with Low-frequency compensation value and high frequency compensation value complement are repaid survey by the brightness value of test image same position pixel, i.e. liquid crystal display Attempt as in same position pixel pixel value in, and according to the pixel value of the test image after compensation set display screen in The brightness value of test image same position pixel, for example, liquid crystal display is by the i-th row jth row picture in low-frequency compensation image The corresponding low-frequency compensation value complement of vegetarian refreshments is repaid in the i-th row jth row pixel of test image, and by i-th in high frequency compensation image The corresponding high frequency compensation value complement of row jth row pixel is repaid in the i-th row jth row pixel of test image, now the test chart The corresponding pixel value of the i-th row jth row pixel of picture is the pixel value after compensation, according to the pixel value after the compensation and in advance If brightness value conversion formula, calculate the brightness value of the i-th row jth row pixel in the display screen, show bright to adjust display screen The uniformity of degree.Wherein, the default brightness value conversion formula is：
Y(i,j)=aR(i,j)+bG(i,j)+cB(i,j)
Wherein, Y(i,j)For the brightness value of the i-th row jth row pixel in display screen, R(i,j)For the i-th row jth in test image The R values of pixel value, G after the compensation of row pixel(i,j)The G values of pixel value after being compensated for the i-th row jth row pixel in test image, B(i,j)For the B values of pixel value after the i-th row jth row pixel compensation in test image, i and j are integer, and a, b, c are coefficient.
The sample exported when the brightness of display screen of low-and high-frequency processing terminal collection liquid crystal display is uniform in the present embodiment Image, and brightness of display screen it is uneven when the test image that exports, under brightness of display screen uniformity shaping modes, liquid crystal Show that equipment exports test image, so that low-and high-frequency processing terminal gathers the test image, and according to the test image and sample This image sends low-frequency compensation image and high frequency compensation image, liquid crystal display parsing low-frequency compensation figure to liquid crystal display Picture and high frequency compensation image, obtain the corresponding low-frequency compensation value of each pixel and high frequency compensation image in low-frequency compensation image In the corresponding high frequency compensation value of each pixel, according to low-frequency compensation value and high frequency compensation value adjust in display screen with test chart As the brightness value of same position pixel, to adjust the uniformity of display screen display brightness.Because low-frequency compensation value and high frequency are mended The difference of the pixel value for the test image that value is liquid crystal display output and the pixel value of sample image is repaid, and exports the sample The display screen display brightness of another liquid crystal display of image is uniform, therefore by by low-frequency compensation value and high frequency compensation Value complement is repaid in test image, to adjust the brightness value in display screen with test image same position pixel so that output is surveyed Attempt the display screen of the display screen display brightness and another liquid crystal display of output sample image of the liquid crystal display of picture Display brightness is consistent, so as to eliminate brightness of display screen inhomogeneities, improves the display effect of display screen.
Further, referring to Fig. 4, being the refinement step of step S130 in first embodiment of the invention, step S130 Refinement step include：
Step S131, liquid crystal display respectively by the corresponding low-frequency compensation value of each pixel in low-frequency compensation image with The pixel value of same position pixel is overlapped in test image, is obtained the corresponding low frequency of the pixel of each in test image and is adjusted Section value, and respectively by same position pixel in the corresponding high frequency compensation value of each pixel in high frequency compensation image and test image The pixel value of point is overlapped, and obtains the corresponding high frequency regulated value of the pixel of each in test image；
Step S132, liquid crystal display according to low frequency regulated value and high frequency regulated value set in display screen with test The brightness value of image same position pixel.
In the present embodiment, default low frequency regulated value calculation formula is：
I11(i,j)=I1(i,j)+test(i,j)
Wherein, I11(i,j)For the corresponding low frequency regulated value of the i-th row jth row pixel, I1 in test image(i,j)For low frequency Compensate the low-frequency compensation value of the i-th row jth row pixel in image, test(i,j)For the i-th row jth row pixel in test image Pixel value.The pixel value of the pixel of each in test image and low frequency are mended respectively based on default low frequency regulated value calculation formula The low-frequency compensation value for repaying same position pixel in image is overlapped, and obtains the corresponding low frequency of each pixel in test image Regulated value, now replaces each pixel corresponding low frequency regulated value the pixel of same position pixel in the test image Value, obtains low frequency regulation image A3.And according to default high frequency regulated value calculation formula respectively by the pixel of each in test image The high frequency compensation value of the pixel value and same position pixel in high frequency compensation image of point is overlapped, and obtains each in test image The corresponding high frequency regulated value of individual pixel, now replaces identical in the test image by the corresponding high frequency regulated value of each pixel The pixel value of position pixel, obtains high frequency regulation image A4.Wherein, the default high frequency regulated value calculation formula is：
I22(i,j)=I2(i,j)+test(i,j)
Wherein, I22(i,j)For the corresponding high frequency regulated value of the i-th row jth row pixel, I2 in test image(i,j)For high frequency Compensate the high frequency compensation value of the i-th row jth row pixel in image, test(i,j)For the i-th row jth row pixel in test image Pixel value.
After calculating obtains low frequency regulated value and high frequency regulated value, liquid crystal display is according to low frequency regulated value and high frequency Regulated value sets the brightness value with test image same position pixel in display screen.
With reference to Fig. 5 and Fig. 6, for the description of image, the low frequency adjusts image A3 measurements of the chest, waist and hips spatial image as shown in B3, its In, measurements of the chest, waist and hips spatial image B3 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, low frequency regulation image A3 The heavier place of middle shade, represents that the frequency of pixel is lower, is reflected on measurements of the chest, waist and hips spatial image B3 and understands, the lower picture of frequency Vegetarian refreshments spoke value is smaller, and the lighter place of shade, represents that the frequency of pixel is higher, be reflected in measurements of the chest, waist and hips in low frequency regulation image A3 Understood on spatial image B3, the higher pixel spoke value of frequency is bigger；High frequency regulation image A4 measurements of the chest, waist and hips spatial image such as B4 It is shown, wherein, measurements of the chest, waist and hips spatial image B4 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, high frequency regulation The lighter place of shade in image A4, represents that the frequency of pixel is higher, is reflected on measurements of the chest, waist and hips spatial image B4 and understands, frequency is got over High pixel spoke value is bigger, and the heavier place of shade, represents that the frequency of pixel is smaller, reflection in high frequency regulation image A4 Understood on measurements of the chest, waist and hips spatial image B4, the smaller pixel spoke value of frequency is smaller.
It should be noted that the pixel value of each pixel includes R values, G values and B values these three component values, such as exist When the corresponding low frequency of the i-th row jth row pixel is adjusted in calculating test image, by the i-th row jth row pixel in low-frequency compensation image The G values of the low-frequency compensation value of point are added with the G values of the pixel value of the i-th row jth row pixel in test image, obtain test image In the corresponding low frequency regulated value of the i-th row jth row pixel G values, i.e. I11 (G)(i,j)=I1 (G)(i,j)+test(G)(i,j)。
The present embodiment is by liquid crystal display respectively by the corresponding low-frequency compensation of each pixel in low-frequency compensation image Value and the pixel value of same position pixel in test image are overlapped, and obtain the pixel of each in test image corresponding low Frequency regulated value, and respectively by same position in the corresponding high frequency compensation value of each pixel in high frequency compensation image and test image The pixel value of pixel is overlapped, and is obtained the corresponding high frequency regulated value of the pixel of each in test image, is adjusted according to low frequency Value and high frequency regulated value set the brightness value in display screen with test image same position pixel.Due to when test image with During the difference that sample image is present, calculated based on sample image when the corresponding low frequency regulated value of the pixel of each in test image And high frequency regulated value, therefore shown according to the corresponding low frequency regulated value of each pixel and high frequency regulated value regulation display screen The uniformity of brightness, not only ensures the accuracy of regulation brightness of display screen uniformity, and it is equal to improve display screen display brightness The regulation efficiency of even property.
Further, referring to Fig. 7, being the refinement of step S132 in the adjusting method of brightness of display screen uniformity of the present invention Step, step S132 refinement step includes：
Step S1321, liquid crystal display respectively by the corresponding low frequency regulated value of the pixel of each in test image and High frequency regulated value is overlapped, and obtains the corresponding low-and high-frequency regulated value of the pixel of each in test image；
Step S1322, liquid crystal display calculates the average value of low-and high-frequency regulated value, and according to the flat of low-and high-frequency regulated value Average sets the brightness value with test image same position pixel in display screen.
In the present embodiment, liquid crystal display respectively by the corresponding low frequency regulated value of the pixel of each in test image with High frequency regulated value is overlapped, and obtains the corresponding low-and high-frequency regulated value of each pixel in test image, and calculate test image In the corresponding high frequency regulated value of each pixel average value, i.e., the corresponding high frequency regulated value of each pixel in test image D(i,j)=I11(i,j)+I22(i,j), calculate this and according to the average value of low-and high-frequency regulated value set display screen in test image phase With the brightness value D of position pixel(i,j)Average value, and according to low-and high-frequency regulated value D(i,j)Average value set display screen in With the brightness value of test image same position pixel.
It should be noted that the average value of the corresponding low-and high-frequency regulated value of each pixel all includes in the test image R values, G values and B values these three component values, then set according to the average value of default brightness value conversion formula and low-and high-frequency regulated value With the brightness value of test image same position pixel in display screen, to adjust the uniformity of display screen display brightness.
The present embodiment by liquid crystal display respectively by the corresponding low frequency regulated value of the pixel of each in test image with And high frequency regulated value is overlapped, the corresponding low-and high-frequency regulated value of the pixel of each in test image is obtained, and calculate low-and high-frequency The average value of regulated value, and according to the average value of low-and high-frequency regulated value set display screen in test image same position pixel Brightness value.Due to when calculating obtains the average value of the corresponding low-and high-frequency regulated value of each pixel in test image, showing By the regulation of the pixel value of the pixel of each in test image to consistent with the pixel value of the pixel of each in sample image, and because of The brightness of display screen of the corresponding sample liquid crystal display of sample image is uniform, therefore, passes through the flat of low-and high-frequency regulated value Average sets the brightness value in display screen with test image same position pixel so that the brightness that regulation display screen is shown Uniformity is consistent with the uniformity of the brightness of display screen of sample liquid crystal display, and noise spot will not be introduced by such a mode, Also chroma offset will not be produced.
The present invention further provides a kind of adjusting method of brightness of display screen uniformity.
Reference picture 8, Fig. 8 illustrates for the flow of the second embodiment of the adjusting method of brightness of display screen uniformity of the present invention Figure.
In the present embodiment, the adjusting method of the brightness of display screen uniformity includes：
Step S210, the sample graph that the brightness of display screen of low-and high-frequency processing terminal collection liquid crystal display is exported when uniform Picture, and brightness of display screen it is uneven when the test image that exports；
In the present embodiment, liquid crystal display is by bluetooth, Wi-Fi, wireless network card or wired connection mode and is somebody's turn to do Low-and high-frequency processing terminal is associated.Low-and high-frequency processing terminal calls the camera of local terminal to shoot the figure that liquid crystal display is currently exported Picture, obtains test image A6, and obtain the sample image A5 of collection that local terminal has been stored or current.Wherein, in order to get Sample image A5, by consistent with the model of the liquid crystal display, and the uniform another liquid crystal display of brightness of display screen is set Image of the standby output under identical irradiation level, shoots the image, obtains sample image A5；The high frequency and low frequency of the sample image Identical, the display effect of sample image is preferable.For example, A videos are currently played in liquid crystal display, when being played to the a1 times During point, the brightness of display screen for detecting liquid crystal display is uneven, and low-and high-frequency processing terminal shoots and shown at the a1 time points The shown display image of screen, obtains test image A6, and sample liquid crystal display is worked as when playing the A videos when playing During a1 time points, low-and high-frequency processing terminal is shot in the display image shown by the a1 time point display screens, obtains sample image A5。
Or, when the brightness of display screen for detecting liquid crystal display is uneven, tester can utilize video camera The image that liquid crystal display is currently exported is shot, test image is obtained, the test image is input to low-and high-frequency processing terminal In, so that low-and high-frequency processing terminal obtains the test image.
Shot it should be noted that either shoot still low-and high-frequency processing terminal by video camera, they Resolution ratio it is consistent with the resolution sizes of liquid crystal display, compensation error can be so reduced, for example, liquid crystal display Resolution ratio be 2120*3800, then the resolution ratio of video camera also be 2120*3800.The sample image and the test image The image that can also be able to be non-single-pass with single pass image, this programme for convenience of description, preferably single pass sample image And test image.
With reference to Fig. 9 and Figure 10, for the description of image, sample image A5 measurements of the chest, waist and hips spatial image as shown in B5, wherein, Measurements of the chest, waist and hips spatial image B5 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, sample image A5 uniformities compared with Good, i.e. the high-frequency signal of each pixel is consistent with low frequency signal in sample image A5, and being reflected in can on measurements of the chest, waist and hips spatial image B5 Know, change of the good image of uniformity almost without any Wave crest and wave trough；Test image A6 measurements of the chest, waist and hips spatial image such as B6 institutes Show, wherein, measurements of the chest, waist and hips spatial image B6 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, test image A6 The lighter place of middle shade, represents that the frequency of pixel is higher, is reflected on measurements of the chest, waist and hips spatial image B6 and understands, the higher picture of frequency Vegetarian refreshments spoke value is bigger, the heavier place of shade in test image A6, represents that the frequency of pixel is smaller, is reflected in three confining spaces Understood on image B6, the smaller pixel spoke value of frequency is smaller.
Step S220, when the brightness of display screen for detecting liquid crystal display is uneven, low-and high-frequency processing terminal passes through High-pass filter and low pass filter are filtered to test image respectively, obtain high-pass filtering after High frequency filter image with And the low frequency filtering image after LPF；
When the brightness of display screen for detecting liquid crystal display is uneven, low-and high-frequency processing terminal passes through high-pass filter High-pass filtering is carried out to test image, retains the low frequency part in the HFS information in test image, filtering test image Information, the pixel value for obtaining part pixel in the High frequency filter image after high-pass filtering, High frequency filter image changes, with Test image is inconsistent in the pixel value of the pixel of same position, and the pixel value of another part pixel does not change, It is consistent in the pixel value of the pixel of same position with test image, by the picture of the i-th row jth row pixel in High frequency filter image Plain value is labeled as L_H(i,j), and test image is filtered by low pass filter, retain the low frequency part in test image HFS information in information, filtering test image, is obtained in the low frequency filtering image after LPF, low frequency filtering image The pixel value of partial pixel point changes, inconsistent in the pixel value of the pixel of same position with test image, and another The pixel value of partial pixel point does not change, consistent in the pixel value of the pixel of same position with test image, by low frequency The pixel value of the i-th row jth row pixel is labeled as L_L in filtering image(i,j), wherein, i and j are integer.
Step S230, low-and high-frequency processing terminal calculates the difference of the pixel value of sample image and the pixel value of High frequency filter image Value, obtains high frequency compensation image, and calculates the difference of the pixel value of sample image and the pixel value of low frequency filtering image, obtains low Frequency compensation image；
High frequency compensation image and low-frequency compensation image are sent to liquid crystal display and set by step S240, low-and high-frequency processing terminal It is standby, so that liquid crystal display is based on high frequency compensation image and low-frequency compensation image adjustment brightness of display screen uniformity.
The difference of the pixel value of sample image and the pixel value of High frequency filter image is calculated, high frequency compensation image is obtained, and The difference of the pixel value of this image and the pixel value of low frequency filtering image is calculated, low-frequency compensation image is obtained, by high frequency compensation figure Picture and low-frequency compensation image are sent to liquid crystal display, so that liquid crystal display is based on high frequency compensation image and low-frequency compensation Image adjustment brightness of display screen uniformity.
It is understood that when the figure for shooting other liquid crystal displays output consistent with the liquid crystal display model Picture, when obtaining the second test image, the low-and high-frequency processing terminal is by high-pass filter and low pass filter respectively to second Test image is filtered, and obtains the second High frequency filter image after high-pass filtering and the second low frequency filtering after LPF Image, if the second High frequency filter image is consistent with High frequency filter image, and the second low frequency filtering image and low frequency filtering image Unanimously, then the low-and high-frequency processing terminal high frequency compensation image and low-frequency compensation image can be sent to the liquid crystal display type Number other consistent liquid crystal displays, to improve the regulation efficiency of brightness of display screen uniformity.
The sample graph that the brightness of display screen of the present embodiment low-and high-frequency processing terminal collection liquid crystal display is exported when uniform Picture, and brightness of display screen it is uneven when the test image that exports, when the brightness of display screen for detecting liquid crystal display is uneven When even, test image is filtered respectively by high-pass filter and low pass filter, the high frequency after high-pass filtering is obtained Low frequency filtering image after filtering image and LPF, calculates the pixel value of sample image and the pixel of High frequency filter image The difference of value, obtains high frequency compensation image, and calculates the difference of the pixel value of sample image and the pixel value of low frequency filtering image, Low-frequency compensation image is obtained, high frequency compensation image and low-frequency compensation image are sent to liquid crystal display, for liquid crystal display Equipment is based on high frequency compensation image and low-frequency compensation image adjustment brightness of display screen uniformity.Due to by high-pass filter and Low pass filter separates the radio-frequency component and low-frequency component of test image, enabling the correct picture for calculating sample image Element value and the high frequency compensation value of the pixel value of High frequency filter image, and the pixel value and low frequency filtering image of sample image picture The low-frequency compensation value of element value, it is equal according to high frequency compensation value and low-frequency compensation value regulation brightness of display screen to improve liquid crystal display The accuracy of even property.
Further, above-mentioned steps S230 is specifically included：Low-and high-frequency processing terminal calculates each picture of sample image respectively The difference of the pixel value of vegetarian refreshments and the pixel value of same position pixel in low frequency filtering image, obtain low-frequency compensation image and The corresponding low-frequency compensation value of each pixel in low-frequency compensation image, and the pixel of each pixel of sample image is calculated respectively Value and the difference of the pixel value of same position pixel in High frequency filter image, obtain high frequency compensation image and high frequency compensation figure The corresponding high frequency compensation value of each pixel as in.
In the present embodiment, default low-frequency compensation value calculation formula is：
I1(i,j)=sample(i,j)-I_L(i,j)
Wherein, I1(i,j)For the low-frequency compensation value of the i-th row jth row pixel, sample(i,j)For the i-th row in sample image The pixel value of jth row pixel, I_L(i,j)For the pixel value of the i-th row jth row pixel in low frequency filtering image.According to default Low-frequency compensation value calculation formula calculates the pixel value and same position picture in low frequency filtering image of each pixel of sample image The difference of the pixel value of vegetarian refreshments, obtains multiple low-frequency compensation values.And sample is calculated according to default high frequency compensation value calculation formula The difference of the pixel value of each pixel of image and the pixel value of same position pixel in High frequency filter image, is obtained multiple High frequency compensation value.The default high frequency compensation value calculation formula is：
I2(i,j)=sample(i,j)-I_H(i,j)
Wherein, I2(i,j)For the high frequency compensation value of the i-th row jth row pixel, sample(i,j)For the i-th row in sample image The pixel value of jth row pixel, I_H(i,j)For the pixel value of the i-th row jth row pixel in low frequency filtering image.
According to the pixel position of the corresponding low-frequency compensation value of each pixel and each low-frequency compensation value, a frame is obtained Low-frequency compensation image, according to the pixel position of the corresponding high frequency compensation value of each pixel and each high frequency compensation value, is obtained To a frame high frequency compensation image.
The present embodiment calculates the pixel value and low frequency of each pixel of sample image by low-and high-frequency processing terminal respectively The difference of the pixel value of same position pixel in filtering image, obtains each in low-frequency compensation image and low-frequency compensation image The corresponding low-frequency compensation value of individual pixel, and the pixel value and High frequency filter image of each pixel of sample image are calculated respectively The difference of the pixel value of middle same position pixel, obtains each pixel pair in high frequency compensation image and high frequency compensation image The high frequency compensation value answered.It is bright come the display screen for compensating liquid crystal display by the low-frequency compensation image and high frequency compensation image The uniformity of degree, improves compensation speed.
The present invention further provides a kind of regulating system of brightness of display screen uniformity.
Reference picture 12, Figure 12 is the functional module of the first embodiment of the regulating system of brightness of display screen uniformity of the present invention Schematic diagram.
In the present embodiment, the regulating system liquid crystal display of the brightness of display screen uniformity and low-and high-frequency processing Terminal, wherein, the liquid crystal display includes：Output module 110, acquisition module 120 and adjustment module 130.
The output module 110, under brightness of display screen uniformity shaping modes, test image being exported, for height Low frequency processing terminal collecting test image, and low-frequency compensation figure is sent to liquid crystal display according to test image and sample image Picture and high frequency compensation image, wherein, the figure that the test image is exported when uneven for the brightness of display screen of liquid crystal display Picture, the sample image is the image exported when brightness of display screen is uniform；
In the present embodiment, it is each in the image of display screen output when liquid crystal display inputs uniform irradiation level The pixel value of color channel all pixels point is identical, and such as when liquid crystal display projects uniform light source, display screen is defeated Go out homogeneity picture, if the part existing defects being adjusted in liquid crystal display to inputting uniform irradiation level (are such as produced Material is poor used in CCD in liquid crystal display) so that the pixel of each color channel in the image of display screen output Pixel value it is different, cause the brightness value of each pixel in the display screen of liquid crystal display inconsistent, so as to cause display The brightness irregularities of screen.When the brightness of display screen uniformity of liquid crystal display is poor, tester can be to the liquid crystal display The brightness of display screen uniformity of equipment is adjusted, to eliminate the inhomogeneities of brightness of display screen.In brightness of display screen uniformity Under shaping modes, the output test image of output module 110 in liquid crystal display, for low-and high-frequency processing terminal collecting test Image.The sample image that the brightness of display screen of low-and high-frequency processing terminal collection liquid crystal display is exported when uniform, and display The test image exported during screen brightness irregularities, wherein, the sample image is that display screen display brightness is uniform preferably another Liquid crystal display output, the low-and high-frequency processing terminal is by high-pass filter and low pass filter respectively to test image It is filtered, obtains the High frequency filter image after high-pass filtering and the low frequency filtering image after LPF, and calculate respectively The difference of the pixel value of sample image and the pixel value of High frequency filter image and the pixel value of low frequency filtering image, is obtained and height The corresponding high frequency compensation image of frequency filtering image and low-frequency compensation image corresponding with low frequency filtering image, low-and high-frequency processing is eventually End sends high frequency compensation image and low-frequency compensation image to liquid crystal display.
The acquisition module 120, for parsing the low-frequency compensation image and high frequency compensation image that receive, obtains low frequency and mends Repay the corresponding high frequency compensation of each pixel in the corresponding low-frequency compensation value of the pixel of each in image and high frequency compensation image Value；
When the acquisition module 120 in liquid crystal display receive low-and high-frequency processing terminal transmission low-frequency compensation image and During high frequency compensation image, parsing low-frequency compensation image and high frequency compensation image obtain each pixel pair in low-frequency compensation image The corresponding high frequency compensation value of each pixel in the low-frequency compensation value and high frequency compensation image answered.
With reference to Fig. 2 and Fig. 3, for the description of image, low-frequency compensation image A1 measurements of the chest, waist and hips spatial image as shown in B1, its In, measurements of the chest, waist and hips spatial image B1 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, low-frequency compensation image A1 The heavier place of middle shade, represents that the frequency of pixel is lower, is reflected on measurements of the chest, waist and hips spatial image B1 and understands, the lower picture of frequency Vegetarian refreshments spoke value is smaller, the lighter place of shade in low-frequency compensation image A1, represents that the frequency of pixel is higher, is reflected in measurements of the chest, waist and hips Understood on spatial image B1, the higher pixel spoke value of frequency is bigger；High frequency compensation image A2 measurements of the chest, waist and hips spatial image such as B2 It is shown, wherein, measurements of the chest, waist and hips spatial image B2 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, the high frequency compensation The lighter place of shade in image A2, represents that the frequency of pixel is higher, is reflected on measurements of the chest, waist and hips spatial image B2 and understands, frequency is got over High pixel spoke value is bigger, the heavier place of shade in high frequency compensation image A2, represents that the frequency of pixel is smaller, reflection Understood on measurements of the chest, waist and hips spatial image B2, the smaller pixel spoke value of frequency is smaller.
The adjustment module 130, for according to low-frequency compensation value and high frequency compensation value adjust in display screen with test chart As the brightness value of same position pixel, to adjust the uniformity of display screen display brightness.
Adjustment module 130 in liquid crystal display repays low-frequency compensation value and high frequency compensation value complement in test image, To adjust the brightness value in display screen with test image same position pixel, i.e. adjustment module 130 by low-frequency compensation value and height Frequency offset is compensated into test image in the pixel value of same position pixel, and according to the pixel of the test image after compensation Value sets brightness value with test image same position pixel in display screen, for example, liquid crystal display is by low-frequency compensation figure The corresponding low-frequency compensation value complement of the i-th row jth row pixel is repaid in the i-th row jth row pixel of test image as in, and will The corresponding high frequency compensation value complement of the i-th row jth row pixel repays the i-th row jth row pixel of test image in high frequency compensation image In point, now the corresponding pixel value of the i-th row jth row pixel of the test image is the pixel value after compensation, according to the compensation Pixel value and default brightness value conversion formula afterwards, calculate the brightness value of the i-th row jth row pixel in the display screen, with Adjust the uniformity of display screen display brightness.Wherein, the default brightness value conversion formula is：
Y(i,j)=aR(i,j)+bG(i,j)+cB(i,j)
Wherein, Y(i,j)For the brightness value of the i-th row jth row pixel in display screen, R(i,j)For the i-th row jth in test image The R values of pixel value, G after the compensation of row pixel(i,j)The G values of pixel value after being compensated for the i-th row jth row pixel in test image, B(i,j)For the B values of pixel value after the i-th row jth row pixel compensation in test image, i and j are integer, and a, b, c are coefficient.
The sample exported when the brightness of display screen of low-and high-frequency processing terminal collection liquid crystal display is uniform in the present embodiment Image, and brightness of display screen it is uneven when the test image that exports, under brightness of display screen uniformity shaping modes, export mould Block 110 exports test image, so that low-and high-frequency processing terminal gathers the test image, and according to the test image and sample Image sends low-frequency compensation image and high frequency compensation image to liquid crystal display, and acquisition module 120 parses the low frequency received Image and high frequency compensation image are compensated, the corresponding low-frequency compensation value of each pixel and high frequency in low-frequency compensation image is obtained and mends The corresponding high frequency compensation value of the pixel of each in image is repaid, adjustment module 130 is adjusted according to low-frequency compensation value and high frequency compensation value The brightness value with test image same position pixel in display screen is saved, to adjust the uniformity of display screen display brightness.Due to Low-frequency compensation value and high frequency compensation value are the pixel value and the pixel value of sample image of the test image of liquid crystal display output Difference, and the display screen display brightness for exporting another liquid crystal display of the sample image is uniform, therefore pass through will Low-frequency compensation value and high frequency compensation value complement are repaid in test image, with adjust in display screen with test image same position pixel Brightness value so that output test image liquid crystal display display screen display brightness with output sample image another liquid The display screen display brightness of crystal display device is consistent, so as to eliminate brightness of display screen inhomogeneities, improves the display effect of display screen Really.
Further, based on the first embodiment, the of the regulating system of brightness of display screen uniformity of the present invention is proposed Two embodiments, in the present embodiment, reference picture 13, the adjustment module 130 include compensating unit 131, setting unit 132.
The compensating unit 131, for respectively by the corresponding low-frequency compensation value of each pixel in low-frequency compensation image with The pixel value of same position pixel is overlapped in test image, is obtained the corresponding low frequency of the pixel of each in test image and is adjusted Section value, and respectively by same position pixel in the corresponding high frequency compensation value of each pixel in high frequency compensation image and test image The pixel value of point is overlapped, and obtains the corresponding high frequency regulated value of the pixel of each in test image；
The setting unit 132, for according to low frequency regulated value and high frequency regulated value set in display screen with test chart As the brightness value of same position pixel.
In the present embodiment, default low frequency regulated value calculation formula is：
I11(i,j)=I1(i,j)+test(i,j)
Wherein, I11(i,j)For the corresponding low frequency regulated value of the i-th row jth row pixel, I1 in test image(i,j)For low frequency Compensate the low-frequency compensation value of the i-th row jth row pixel in image, test(i,j)For the i-th row jth row pixel in test image Pixel value.Compensating unit 131 is based on default low frequency regulated value calculation formula respectively by the picture of the pixel of each in test image Plain value and the low-frequency compensation value of same position pixel in low-frequency compensation image are overlapped, and obtain each pixel in test image The corresponding low frequency regulated value of point, now replaces same position picture in the test image by the corresponding low frequency regulated value of each pixel The pixel value of vegetarian refreshments, obtains low frequency regulation image A3.And according to default high frequency regulated value calculation formula respectively by test image In the high frequency compensation value of pixel value and same position pixel in high frequency compensation image of each pixel be overlapped, obtain and survey Attempt the corresponding high frequency regulated value of each pixel as in, the corresponding high frequency regulated value of each pixel is now replaced into the test The pixel value of same position pixel in image, obtains high frequency regulation image A4.Wherein, the default high frequency regulated value calculates public Formula is：
I22(i,j)=I2(i,j)+test(i,j)
Wherein, I22(i,j)For the corresponding high frequency regulated value of the i-th row jth row pixel, I2 in test image(i,j)For high frequency Compensate the high frequency compensation value of the i-th row jth row pixel in image, test(i,j)For the i-th row jth row pixel in test image Pixel value.
After calculating obtains low frequency regulated value and high frequency regulated value, setting unit 132 is according to low frequency regulated value and high frequency Regulated value sets the brightness value with test image same position pixel in display screen.
With reference to Fig. 5 and Fig. 6, for the description of image, the low frequency adjusts image A3 measurements of the chest, waist and hips spatial image as shown in B3, its In, measurements of the chest, waist and hips spatial image B3 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, low frequency regulation image A3 The heavier place of middle shade, represents that the frequency of pixel is lower, is reflected on measurements of the chest, waist and hips spatial image B3 and understands, the lower picture of frequency Vegetarian refreshments spoke value is smaller, and the lighter place of shade, represents that the frequency of pixel is higher, be reflected in three in low frequency regulation image A3 Understood on confining space image B3, the higher pixel spoke value of frequency is bigger；High frequency regulation image A4 measurements of the chest, waist and hips spatial image is such as Shown in B4, wherein, measurements of the chest, waist and hips spatial image B4 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, the high frequency modulation The lighter place of shade in image A4 is saved, represents that the frequency of pixel is higher, is reflected on measurements of the chest, waist and hips spatial image B4 and understands, frequency Higher pixel spoke value is bigger, and the heavier place of shade, represents that the frequency of pixel is smaller, instead in high frequency regulation image A4 Reflect and understood on measurements of the chest, waist and hips spatial image B4, the smaller pixel spoke value of frequency is smaller.
It should be noted that the pixel value of each pixel includes R values, G values and B values these three component values, such as exist When the corresponding low frequency of the i-th row jth row pixel is adjusted in calculating test image, by the i-th row jth row pixel in low-frequency compensation image The G values of the low-frequency compensation value of point are added with the G values of the pixel value of the i-th row jth row pixel in test image, obtain test image In the corresponding low frequency regulated value of the i-th row jth row pixel G values, i.e. I11 (G)(i,j)=I1 (G)(i,j)+test(G)(i,j)。
The present embodiment is by liquid crystal display respectively by the corresponding low-frequency compensation of each pixel in low-frequency compensation image Value and the pixel value of same position pixel in test image are overlapped, and obtain the pixel of each in test image corresponding low Frequency regulated value, and respectively by same position in the corresponding high frequency compensation value of each pixel in high frequency compensation image and test image The pixel value of pixel is overlapped, and is obtained the corresponding high frequency regulated value of the pixel of each in test image, is adjusted according to low frequency Value and high frequency regulated value set the brightness value in display screen with test image same position pixel.Due to when test image with During the difference that sample image is present, calculated based on sample image when the corresponding low frequency regulated value of the pixel of each in test image And high frequency regulated value, therefore shown according to the corresponding low frequency regulated value of each pixel and high frequency regulated value regulation display screen The uniformity of brightness, not only ensures the accuracy of regulation brightness of display screen uniformity, and it is equal to improve display screen display brightness The regulation efficiency of even property.
Further, based on the second embodiment, the of the regulating system of brightness of display screen uniformity of the present invention is proposed Three embodiments, in the present embodiment, reference picture 14, the setting unit 132 include superposition subelement 1321, set subelement 1322。
The superposition subelement 1321, for respectively by the corresponding low frequency regulated value of the pixel of each in test image and High frequency regulated value is overlapped, and obtains the corresponding low-and high-frequency regulated value of the pixel of each in test image；
The setting subelement member 1322, the average value for calculating low-and high-frequency regulated value, and according to low-and high-frequency regulated value Average value brightness value with test image same position pixel in display screen is set.
In the present embodiment, superposition subelement 1321 is respectively by the corresponding low frequency regulated value of the pixel of each in test image It is overlapped with high frequency regulated value, obtains the corresponding low-and high-frequency regulated value of each pixel in test image, subelement is set 1322 calculate the average value of the corresponding high frequency regulated value of each pixel in test image, i.e., each pixel pair in test image The high frequency regulated value D answered(i,j)=I11(i,j)+I22(i,j), calculate this and display screen set according to the average value of low-and high-frequency regulated value In brightness value D with test image same position pixel(i,j)Average value, set subelement 1322 simultaneously adjusted according to low-and high-frequency Value D(i,j)Average value brightness value with test image same position pixel in display screen is set.
It should be noted that the average value of the corresponding low-and high-frequency regulated value of each pixel all includes in the test image R values, G values and B values these three component values, then set according to the average value of default brightness value conversion formula and low-and high-frequency regulated value With the brightness value of test image same position pixel in display screen, to adjust the uniformity of display screen display brightness.
The present embodiment by liquid crystal display respectively by the corresponding low frequency regulated value of the pixel of each in test image with And high frequency regulated value is overlapped, the corresponding low-and high-frequency regulated value of the pixel of each in test image is obtained, and calculate low-and high-frequency The average value of regulated value, and according to the average value of low-and high-frequency regulated value set display screen in test image same position pixel Brightness value.Due to when calculating obtains the average value of the corresponding low-and high-frequency regulated value of each pixel in test image, showing By the regulation of the pixel value of the pixel of each in test image to consistent with the pixel value of the pixel of each in sample image, and because of The brightness of display screen of the corresponding sample liquid crystal display of sample image is uniform, therefore, passes through the flat of low-and high-frequency regulated value Average sets the brightness value in display screen with test image same position pixel so that the brightness that regulation display screen is shown Uniformity is consistent with the uniformity of the brightness of display screen of sample liquid crystal display, and noise spot will not be introduced by such a mode, Also chroma offset will not be produced.
It is of the invention further to provide a kind of regulating system of brightness of display screen uniformity again.
Reference picture 14, Figure 14 is the 4th of low-and high-frequency processing terminal in the regulating system of brightness of display screen uniformity of the present invention The high-level schematic functional block diagram of embodiment.
In the present embodiment, the low-and high-frequency processing terminal includes：Acquisition module 210, filtration module 220, computing module 230 and sending module 240.
The acquisition module 210, the sample image that the brightness of display screen for gathering liquid crystal display is exported when uniform, And brightness of display screen it is uneven when the test image that exports；
In the present embodiment, liquid crystal display is by bluetooth, Wi-Fi, wireless network card or wired connection mode and is somebody's turn to do Low-and high-frequency processing terminal is associated.Acquisition module 210 in low-and high-frequency processing terminal calls the camera of local terminal to shoot liquid crystal display The image that equipment is currently exported, obtains test image A6, and obtain the sample image A5 of collection that local terminal has been stored or current. Wherein, in order to get sample image A5, by consistent with the model of the liquid crystal display, and brightness of display screen is uniform Another liquid crystal display exports the image under identical irradiation level, shoots the image, obtains sample image A5；The sample graph The high frequency of picture is same with low-frequency phase, and the display effect of sample image is preferable.For example, A videos are currently played in liquid crystal display, When being played to a1 time points, the brightness of display screen for detecting liquid crystal display is uneven, and low-and high-frequency processing terminal, which is shot, to exist Display image shown by the a1 time point display screens, obtains test image A6, and sample liquid crystal display is regarded playing the A During frequency, when playing when a1 time points, low-and high-frequency processing terminal is shot in the display image shown by the a1 time point display screens, Obtain sample image A5.
Or, when the brightness of display screen for detecting liquid crystal display is uneven, tester can utilize video camera The image that liquid crystal display is currently exported is shot, test image is obtained, the test image is input to low-and high-frequency processing terminal In, so that low-and high-frequency processing terminal obtains the test image.
Shot it should be noted that either shoot still low-and high-frequency processing terminal by video camera, they Resolution ratio it is consistent with the resolution sizes of liquid crystal display, compensation error can be so reduced, for example, liquid crystal display Resolution ratio be 2120*3800, then the resolution ratio of video camera also be 2120*3800.The sample image and the test image The image that can also be able to be non-single-pass with single pass image, this programme for convenience of description, preferably single pass sample image And test image.
With reference to Fig. 9 and Figure 10, for the description of image, sample image A5 measurements of the chest, waist and hips spatial image as shown in B5, wherein, Measurements of the chest, waist and hips spatial image B5 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, sample image A5 uniformities compared with Good, i.e. the high-frequency signal of each pixel is consistent with low frequency signal in sample image A5, and being reflected in can on measurements of the chest, waist and hips spatial image B5 Know, change of the good image of uniformity almost without any Wave crest and wave trough；Test image A6 measurements of the chest, waist and hips spatial image such as B6 institutes Show, wherein, measurements of the chest, waist and hips spatial image B6 Z axis is spoke value, and X-axis and Y-axis represent the position where pixel, test image A6 The lighter place of middle shade, represents that the frequency of pixel is higher, is reflected on measurements of the chest, waist and hips spatial image B6 and understands, the higher picture of frequency Vegetarian refreshments spoke value is bigger, the heavier place of shade in test image A6, represents that the frequency of pixel is smaller, is reflected in three confining spaces Understood on image B6, the smaller pixel spoke value of frequency is smaller.
The filtration module 220, for when the brightness of display screen for detecting liquid crystal display is uneven, passing through high pass Wave filter and low pass filter are filtered to test image respectively, obtain the High frequency filter image after high-pass filtering and low Low frequency filtering image after pass filter；
When the brightness of display screen for detecting liquid crystal display is uneven, the filtration module in low-and high-frequency processing terminal 220 carry out high-pass filtering by high-pass filter to test image, retain the HFS information in test image, filtering test Low frequency part information in image, obtains part pixel in the High frequency filter image after high-pass filtering, High frequency filter image Pixel value changes, inconsistent in the pixel value of the pixel of same position with test image, and another part pixel Pixel value does not change, consistent in the pixel value of the pixel of same position with test image, by i-th in High frequency filter image The pixel value of row jth row pixel is labeled as L_H(i,j), and test image is filtered by low pass filter, retain test HFS information in low frequency part information in image, filtering test image, obtains the low frequency filtering figure after LPF The pixel value of part pixel changes in picture, low frequency filtering image, with test image the pixel of same position picture Element value is inconsistent, and the pixel value of another part pixel does not change, with test image same position pixel Pixel value is consistent, and the pixel value of the i-th row jth row pixel in low frequency filtering image is labeled as into L_L(i,j), wherein, i and j are whole Number.
The computing module 230, the difference for calculating the pixel value of sample image and the pixel value of High frequency filter image, High frequency compensation image is obtained, and calculates the difference of the pixel value of sample image and the pixel value of low frequency filtering image, low frequency is obtained Compensate image；
The sending module 240, for high frequency compensation image and low-frequency compensation image to be sent to liquid crystal display, with Feed flow crystal display device is based on high frequency compensation image and low-frequency compensation image adjustment brightness of display screen uniformity.
Computing module 230 calculates the difference of the pixel value of sample image and the pixel value of High frequency filter image, obtains high frequency Image is compensated, and calculates the difference of the pixel value of this image and the pixel value of low frequency filtering image, low-frequency compensation image is obtained, sent out Module 240 is sent to send high frequency compensation image and low-frequency compensation image to liquid crystal display, so that liquid crystal display is based on High frequency compensation image and low-frequency compensation image adjustment brightness of display screen uniformity.
It is understood that when the figure for shooting other liquid crystal displays output consistent with the liquid crystal display model Picture, when obtaining the second test image, the low-and high-frequency processing terminal is by high-pass filter and low pass filter respectively to second Test image is filtered, and obtains the second High frequency filter image after high-pass filtering and the second low frequency filtering after LPF Image, if the second High frequency filter image is consistent with High frequency filter image, and the second low frequency filtering image and low frequency filtering image Unanimously, then the low-and high-frequency processing terminal high frequency compensation image and low-frequency compensation image can be sent to the liquid crystal display type Number other consistent liquid crystal displays, to improve the regulation efficiency of brightness of display screen uniformity.
The computing module 230, is additionally operable to calculate the pixel value and low frequency filtering of each pixel of sample image respectively The difference of the pixel value of same position pixel in image, obtains each pixel in low-frequency compensation image and low-frequency compensation image The corresponding low-frequency compensation value of point, and it is identical with High frequency filter image to calculate the pixel value of each pixel of sample image respectively The difference of the pixel value of position pixel, obtains the corresponding height of each pixel in high frequency compensation image and high frequency compensation image Frequency offset.
In the present embodiment, default low-frequency compensation value calculation formula is：
I1(i,j)=sample(i,j)-I_L(i,j)
Wherein, I1(i,j)For the low-frequency compensation value of the i-th row jth row pixel, sample(i,j)For the i-th row in sample image The pixel value of jth row pixel, I_L(i,j)For the pixel value of the i-th row jth row pixel in low frequency filtering image.Computing module 230 calculate the pixel value and low frequency filtering image of each pixel of sample image according to default low-frequency compensation value calculation formula The difference of the pixel value of middle same position pixel, obtains multiple low-frequency compensation values.And calculated according to default high frequency compensation value Formula calculates the pixel value of each pixel of sample image and the pixel value of same position pixel in High frequency filter image Difference, obtains multiple high frequency compensation values.The default high frequency compensation value calculation formula is：
I2(i,j)=sample(i,j)-I_H(i,j)
Wherein, I2(i,j)For the high frequency compensation value of the i-th row jth row pixel, sample(i,j)For the i-th row in sample image The pixel value of jth row pixel, I_H(i,j)For the pixel value of the i-th row jth row pixel in low frequency filtering image.
Computing module 230 replaces each pixel corresponding low-frequency compensation value on the picture of low-frequency image relevant position pixel Element value, obtains low-frequency compensation image, and the corresponding high frequency compensation value of each pixel is replaced into high frequency imaging relevant position pixel The pixel value of point, obtains high frequency compensation image.
The sample image that the brightness of display screen of the present embodiment collection liquid crystal display is exported when uniform, and display screen are bright The test image exported when spending uneven, when the brightness of display screen for detecting liquid crystal display is uneven, is filtered by high pass Ripple device and low pass filter are filtered to test image respectively, obtain High frequency filter image and low pass after high-pass filtering Filtered low frequency filtering image, calculates the difference of the pixel value of sample image and the pixel value of High frequency filter image, obtains high Frequency compensation image, and the difference of the pixel value of sample image and the pixel value of low frequency filtering image is calculated, obtain low-frequency compensation figure Picture, high frequency compensation image and low-frequency compensation image are sent to liquid crystal display, so that liquid crystal display is mended based on high frequency Repay image and low-frequency compensation image adjustment brightness of display screen uniformity.Due to that will be tested by high-pass filter and low pass filter The radio-frequency component and low-frequency component of image are separated, enabling the correct pixel value for calculating sample image and High frequency filter figure The high frequency compensation value of the pixel value of picture, and sample image pixel value and low frequency filtering image pixel value low-frequency compensation Value, to improve the accuracy that liquid crystal display adjusts brightness of display screen uniformity according to high frequency compensation value and low-frequency compensation value.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills Art field, is included within the scope of the present invention.

Claims (10)

1. a kind of adjusting method of brightness of display screen uniformity, it is characterised in that the regulation side of the brightness of display screen uniformity Method comprises the following steps：
Under brightness of display screen uniformity shaping modes, liquid crystal display output test image, for low-and high-frequency processing terminal Gather the test image, and according to the test image and sample image to liquid crystal display send low-frequency compensation image and High frequency compensation image, wherein, the image that the test image is exported when uneven for the brightness of display screen of liquid crystal display, institute State the image that sample image exports for brightness of display screen when uniform；
Low-frequency compensation image and high frequency compensation image that liquid crystal display parsing is received, obtain each in low-frequency compensation image The corresponding high frequency compensation value of each pixel in the corresponding low-frequency compensation value of pixel and high frequency compensation image；
Liquid crystal display according to low-frequency compensation value and high frequency compensation value adjust in display screen with test image same position picture The brightness value of vegetarian refreshments, to adjust the uniformity of display screen display brightness.
2. the adjusting method of brightness of display screen uniformity as claimed in claim 1, it is characterised in that the liquid crystal display According to the step in low-frequency compensation value and high frequency compensation value regulation display screen with the brightness value of test image same position pixel Suddenly include：
Liquid crystal display is respectively by the corresponding low-frequency compensation value of each pixel in low-frequency compensation image and phase in test image Pixel value with position pixel is overlapped, and obtains the corresponding low frequency regulated value of the pixel of each in test image, and respectively By the pixel value of same position pixel in the corresponding high frequency compensation value of each pixel in high frequency compensation image and test image It is overlapped, obtains the corresponding high frequency regulated value of the pixel of each in test image；
Liquid crystal display according to low frequency regulated value and high frequency regulated value set in display screen with test image same position picture The brightness value of vegetarian refreshments.
3. the adjusting method of brightness of display screen uniformity as claimed in claim 2, it is characterised in that the liquid crystal display Step in display screen with the brightness value of test image same position pixel is set according to low frequency regulated value and high frequency regulated value Suddenly include：
Liquid crystal display is respectively carried out the corresponding low frequency regulated value of the pixel of each in test image and high frequency regulated value Superposition, obtains the corresponding low-and high-frequency regulated value of the pixel of each in test image；
Liquid crystal display calculates the average value of low-and high-frequency regulated value, and sets display screen according to the average value of low-and high-frequency regulated value In brightness value with test image same position pixel.
4. a kind of adjusting method of brightness of display screen uniformity, it is characterised in that the regulation side of the brightness of display screen uniformity Method comprises the following steps：
The sample image that the brightness of display screen of low-and high-frequency processing terminal collection liquid crystal display is exported when uniform, and display screen The test image exported during brightness irregularities；
When the brightness of display screen for detecting liquid crystal display is uneven, low-and high-frequency processing terminal by high-pass filter and Low pass filter is filtered to test image respectively, is obtained after High frequency filter image and LPF after high-pass filtering Low frequency filtering image；
Low-and high-frequency processing terminal calculates the difference of the pixel value of sample image and the pixel value of High frequency filter image, obtains high frequency and mends Image is repaid, and calculates the difference of the pixel value of sample image and the pixel value of low frequency filtering image, low-frequency compensation image is obtained；
Low-and high-frequency processing terminal sends high frequency compensation image and low-frequency compensation image to liquid crystal display, for liquid crystal display Equipment is based on high frequency compensation image and low-frequency compensation image adjustment brightness of display screen uniformity.
5. the adjusting method of brightness of display screen uniformity as claimed in claim 4, it is characterised in that the low-and high-frequency processing is eventually End calculates the difference of the pixel value of sample image and the pixel value of High frequency filter image, obtains high frequency compensation image, and calculate sample The difference of the pixel value of this image and the pixel value of low frequency filtering image, the step of obtaining low-frequency compensation image includes：
Low-and high-frequency processing terminal calculates the pixel value and identical bits in low frequency filtering image of each pixel of sample image respectively The difference of the pixel value of pixel is put, the corresponding low frequency of each pixel in low-frequency compensation image and low-frequency compensation image is obtained Offset, and the pixel value and same position pixel in High frequency filter image of each pixel of sample image are calculated respectively The difference of pixel value, obtains the corresponding high frequency compensation value of each pixel in high frequency compensation image and high frequency compensation image.
6. a kind of regulating system of brightness of display screen uniformity, it is characterised in that the regulation system of the brightness of display screen uniformity System includes liquid crystal display and low-and high-frequency processing terminal, wherein, the liquid crystal display includes：
Output module, under brightness of display screen uniformity shaping modes, test image being exported, for low-and high-frequency processing terminal Gather the test image, and according to the test image and sample image to liquid crystal display send low-frequency compensation image and High frequency compensation image, wherein, the image that the test image is exported when uneven for the brightness of display screen of liquid crystal display, institute State the image that sample image exports for brightness of display screen when uniform；
Acquisition module, for parsing the low-frequency compensation image and high frequency compensation image that receive, obtains each in low-frequency compensation image The corresponding high frequency compensation value of each pixel in the corresponding low-frequency compensation value of individual pixel and high frequency compensation image；
Adjustment module, for according to low-frequency compensation value and high frequency compensation value adjust in display screen with test image same position picture The brightness value of vegetarian refreshments, to adjust the uniformity of display screen display brightness.
The low-and high-frequency processing terminal is used to send low-frequency compensation image and high frequency compensation image to liquid crystal display.
7. the regulating system of brightness of display screen uniformity as claimed in claim 6, it is characterised in that the adjustment module bag Include：
Superpositing unit, for respectively by the corresponding low-frequency compensation value of each pixel in low-frequency compensation image and phase in test image Pixel value with position pixel is overlapped, and obtains the corresponding low frequency regulated value of the pixel of each in test image, and respectively By the pixel value of same position pixel in the corresponding high frequency compensation value of each pixel in high frequency compensation image and test image It is overlapped, obtains the corresponding high frequency regulated value of the pixel of each in test image；
Setting unit, for according to low frequency regulated value and high frequency regulated value set in display screen with test image same position picture The brightness value of vegetarian refreshments.
8. the regulating system of brightness of display screen uniformity as claimed in claim 7, it is characterised in that the setting unit bag Include：
Subelement is superimposed, for respectively entering the corresponding low frequency regulated value of the pixel of each in test image and high frequency regulated value Row superposition, obtains the corresponding low-and high-frequency regulated value of the pixel of each in test image；
Subelement, the average value for calculating low-and high-frequency regulated value are set, and set aobvious according to the average value of low-and high-frequency regulated value With the brightness value of test image same position pixel in display screen.
9. a kind of regulating system of brightness of display screen uniformity, it is characterised in that the regulation system of the brightness of display screen uniformity System includes liquid crystal display and low-and high-frequency processing terminal, wherein, the low-and high-frequency processing terminal includes：
Acquisition module, the sample image that the brightness of display screen for gathering liquid crystal display is exported when uniform, and display screen The test image exported during brightness irregularities；
Filtration module, for when the brightness of display screen for detecting liquid crystal display is uneven, by high-pass filter and Low pass filter is filtered to test image respectively, is obtained after High frequency filter image and LPF after high-pass filtering Low frequency filtering image；
Computing module, the difference for calculating the pixel value of sample image and the pixel value of High frequency filter image obtains high frequency and mended Image is repaid, and calculates the difference of the pixel value of sample image and the pixel value of low frequency filtering image, low-frequency compensation image is obtained；
Sending module, for high frequency compensation image and low-frequency compensation image to be sent to liquid crystal display, for liquid crystal display Equipment is based on high frequency compensation image and low-frequency compensation image adjustment brightness of display screen uniformity.
10. the regulating system of brightness of display screen uniformity as claimed in claim 9, it is characterised in that the computing module is also Including：
The pixel of the pixel value and same position pixel in low frequency filtering image of each pixel of sample image is calculated respectively The difference of value, obtains the corresponding low-frequency compensation value of each pixel in low-frequency compensation image and low-frequency compensation image, and respectively The difference of the pixel value and the pixel value of same position pixel in High frequency filter image of each pixel of sample image is calculated, Obtain the corresponding high frequency compensation value of each pixel in high frequency compensation image and high frequency compensation image.
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