CN114999372A - Method for correcting bright and dark lines of LED display unit - Google Patents
Method for correcting bright and dark lines of LED display unit Download PDFInfo
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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The invention relates to a method for correcting bright and dark lines of an LED display unit, which is a method for compensating abnormal values of the brightness integral of a gap area by performing Gaussian filtering on the area integral conforming to conditions according to the rule that the brightness integral of the area of an LED display screen is approximately periodically fluctuated, and calculating correction coefficients at two sides of the gap. The method can accurately position in the bright and dark line correction process, reduce the bright and dark line correction errors, is suitable for the visual difference of bright and dark lines on two sides of a gap caused by the physical splicing gap of the LED display screen of an automatic correction system, and improves the screen display effect.
Description
Technical Field
The invention belongs to the technical field of collection and correction of LED display screens, and relates to a splicing gap correction method of an LED display unit, which is suitable for automatic correction.
Background
According to the traditional large-size LED display screen correction method, a large number of screens are required to be built and then collected and corrected in different areas, bright and dark lines are corrected, the process is complicated, a large amount of manpower is required to be input, damage is caused in the transportation process or the boxes are not put according to the appointed sequence, the box placing positions need to be corrected again or checked one by one, and unnecessary troubles are caused.
Disclosure of Invention
The invention aims to provide a method for correcting bright and dark lines of an LED display unit, which is suitable for automatic correction, and the method can save labor and is convenient to correct.
In order to solve the technical problem, the method for correcting the bright and dark lines of the LED display unit specifically comprises the following steps:
acquiring an image of an LED display unit by using a camera, and processing the image of the LED display unit to obtain pixel coordinates of a splicing and meeting point of each module;
aiming at any two adjacent modules in a row, when the vertical seams are corrected, the two sides of each vertical seam are taken to be outwards and transversely expanded by the width of z multiplied by w, and the middle (x) is taken in the longitudinal direction 1 ～x 2 ) Integration area A of height x h m1n1 All pixel values are used for luminance integration, and x is more than or equal to 5% 1 ≤10％，5％≤x 2 Less than or equal to 10 percent; for any two adjacent modules in a row, when correcting the transverse seam, taking the outward longitudinal extension z x h height of two sides of each transverse seam, and taking the middle (y) in the transverse direction 1 ～y 2 ) Integration region B of xw width m2n2 All pixel values are used for luminance integration, and y is more than or equal to 5% 1 ≤10％，5％≤y 2 Less than or equal to 10 percent; z is more than or equal to 85% and less than or equal to 95%; w is the pixel width occupied by each module, and h is the pixel height occupied by each module;
will integrate the area A m1n1 Equally dividing the pixel into a plurality of vertical sub-integration areas according to the width w/s, and connecting the pixel mean values of all the vertical sub-integration areas into a line LW according to the sequence of numbering from left to right m1n1 (ii) a Wherein s is the number of transverse lamp points of the module; integrating area B m2n2 Equally dividing the horizontal sub-integration regions into a plurality of horizontal sub-integration regions according to the height h/t, and connecting the pixel mean values of all the horizontal sub-integration regions into a line LH according to the numbering sequence from top to bottom m2n2 (ii) a Wherein t is the number of the longitudinal lamp points of the module; using filter functions
For LW m1n1 And LH m2n2 Gaussian filtering is carried out to obtain LW m1n1 And LH m2n2 A filtered waveform, wherein
Is LW m1n1 The ordinate of the point on the filtered waveform corresponding to the ith vertical sub-integration area,
is LH m2n2 The ordinate of the point on the filtered waveform corresponding to the jth transverse sub-integration zone,
is the pixel mean of the ith vertical sub-integration region,
the pixel mean value of the jth transverse sub-integration area is obtained; r is a filter radius, and the value of r is equal to 1-10 pixel sizes; sigma is a standard deviation, and sigma is 1-5;
definition of LW m1n1 The waveform after filtering is a transverse periodic waveform; searching an extreme point A on the standard waveform L closest to the junction point; setting an extreme point A to correspond to the a-th period of the transverse periodic waveform, setting an extreme point B before the extreme point A to correspond to the B-th period of the transverse periodic waveform, and setting an extreme point C after the extreme point A to correspond to the C-th period of the transverse periodic waveform; the vertical coordinates of each point in the b-th period and the corresponding point in the c-th period are comparedTaking the average value as the corrected longitudinal coordinate of the corresponding point of the a-th period, and restoring the waveform of the a-th period; setting the corresponding point on the transverse periodic waveform corresponding to the extreme point A as A k Then, the corresponding point A is k Dividing the corrected vertical coordinate of n corresponding points on two sides of the vertical seam by the vertical coordinate before correction to obtain the repair correction coefficient of n rows of pixel points on two sides of the vertical seam; in the same way, the repairing correction coefficients of the pixel points on the two sides of the transverse seam can be obtained; n is more than or equal to 2 and less than or equal to 5;
for any two adjacent modules in a row, correspondingly multiplying the n restoration correction coefficients on the two sides of the vertical seam by the correction coefficients of the n rows of lamp points on the two sides of the vertical seam to obtain the final correction coefficients of the n rows of lamp points on the two sides of the vertical seam; and for any two adjacent modules in the row, correspondingly multiplying the m repairing correction coefficients on the two sides of the transverse seam by the correction coefficients of the m rows of lamp points on the two sides of the transverse seam to obtain the final correction coefficients of the m rows of lamp points on the two sides of the transverse seam, and correcting the pixel values of the lamp points on the two sides of the vertical seam and the transverse seam by adopting the final correction coefficients to finish the brightness repairing of the LED display unit.
The pixel width w and the height h occupied by the modules are calculated according to the camera pixel size occupied by the LED display unit image, the number of modules in each row and the number of modules in each column.
The pixel width w and the height h occupied by the module can be calculated according to pixel coordinates of any four adjacent intersection points.
When the vertical seams are corrected, the two sides of each vertical seam are preferably extended outwards and transversely by 0.9 xw width, and the integration area A with the middle (0.1-0.9) xh height is taken in the longitudinal direction m1n1 All pixel values are used for luminance integration.
When the transverse seams are corrected, the integral area B with the height of 0.9 multiplied by h and the middle width of (0.1-0.9) multiplied by w is preferably taken from the two sides of each transverse seam and extended outwards and longitudinally m2n2 All pixel values are used for luminance integration.
The filter radius r is preferably equal to 9 pixel size.
Preferably σ -3.
Has the advantages that: according to the rule that the brightness integral value of the area of the LED display screen fluctuates approximately periodically, the method for compensating the abnormal value of the brightness integral of the area of the gap by performing Gaussian filtering on the integral value of the area meeting the conditions calculates the correction coefficients of the two sides of the gap, is suitable for any screen point interval, and has good correction effect no matter the modes such as whole-screen large-area acquisition or fixed-point pipeline operation acquisition and the like
The method can accurately position in the bright and dark line correction process, reduce the bright and dark line correction errors, is suitable for the visual difference of bright and dark lines on two sides of a gap caused by the physical splicing gap of the LED display screen of an automatic correction system, and improves the screen display effect.
Drawings
Fig. 1 is a schematic diagram of the operation of an automated collection and correction platform.
In the figure: an LED display unit; 2. an automated correction system platform; 3. a camera.
FIG. 2 is a schematic diagram of a single module of an LED display screen.
Fig. 3 is a diagram illustrating the selection of the integrated mean region.
Fig. 4 is a graph of the variation trend before and after filtering of each sub-integral mean value in a vertical seam integral region (the abscissa is the vertical sub-integral region number, and the ordinate is the vertical sub-integral region pixel mean value).
Fig. 5 is a graph of the variation trend before and after filtering of each sub-integral mean value in the transverse seam integral region (the abscissa is the transverse sub-integral region number, and the ordinate is the transverse sub-integral region pixel mean value).
FIG. 6 is a graph showing the trend of the mean change of the pixels of the vertical sub-integration regions before and after the vertical seam trimming.
FIG. 7 is a graph showing the trend of the change of the pixel mean value of each lateral sub-integration region in the front and rear integration regions before and after the transverse seam trimming.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, it being understood that the specific embodiments described herein are illustrative of the invention only and are not limiting. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; the two elements may be connected directly or indirectly through an intermediate medium, or the two elements may be connected through an intermediate medium or may be in an interactive relationship with each other. The specific meanings of the above terms in the present invention can be specifically understood in specific cases by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," or "beneath" a second feature includes the first feature being directly under or obliquely below the second feature, or simply means that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The following describes the technical solution of the present invention in detail by taking an example of a module in which the LED display unit is 1.5875mm in dot pitch, the number of modules in each row is 2, the number of modules in each column is 3, the number of transverse light dots of the module is s-96, and the number of longitudinal light dots is t-72.
The method for correcting the bright and dark lines of the LED display unit comprises the following steps:
firstly, as shown in fig. 1, fixing an LED display unit on an automatic correction system platform, and acquiring an image of the LED display unit by using a camera; the LED display unit can be a module or a box body formed by splicing a plurality of LED modules, or an LED display screen formed by splicing a plurality of LED box bodies; processing the image of the LED display unit to obtain pixel coordinates of the splicing and meeting point of each module; calculating the pixel width w and height h occupied by the module and the pixel size occupied by each lamp point of the LED display unit;
the pixel width w and the height h occupied by the modules can be calculated according to the camera pixel size occupied by the LED display unit image, the number of modules in each row and the number of modules in each column; if the camera pixel size W occupied by the LED display unit image is 1862 in the horizontal direction and 2094 in the vertical direction, the pixel width W occupied by the module is 931/2, the pixel height H occupied by the module is H/3 698, and the pixel size occupied by each light point is 9.6979 and 10 in the W/s direction;
the pixel width w and height h occupied by the module can also be obtained by the following method:
four adjacent intersection points are arbitrarily selected, as shown in FIG. 2, and the pixel coordinates thereof are P1(1022,1217),
P2(1953,1215), P3(1024,1914) and P4(1954,1913); taking P1(1022,1217) and P3(1024,1914) as positioning points, and taking P2(1953,1215) and P4(1954,1913) as auxiliary points; calculating the pixel width w and height h occupied by each module, wherein
Secondly, as shown in fig. 3, when the vertical seams of any two adjacent modules in a row are corrected, the outward lateral expansion 931 × 0.9 width of each vertical seam (rounding off the result), and the middle 698 × 0.1-698 × 0.9 height integral area a (rounding off the result) is taken in the longitudinal direction m1n1 All pixel values are used for luminance integration; for any two adjacent modules in a row, when the transverse seam is corrected, the two sides of each transverse seam are taken to extend outwards longitudinally to be 698 multiplied by 0.9 (the result is rounded and takenIntegration), an integral region B of a width of 931X 0.1 to 931X 0.9 (rounding off) in the transverse direction is taken m2n2 All pixel values are used for luminance integration.
Integrating area A m1n1 Equally dividing the vertical sub-integration regions into a plurality of vertical sub-integration regions with the width of 931/96 & lt 10 & gt, respectively numbering the vertical sub-integration regions from left to right as 1,2 and … i …, taking a pixel mean value of each vertical sub-integration region, and dividing the integration region A into a plurality of integration regions m1n1 All vertical sub-integral area pixel mean values are connected into a line LW according to the number m1n1 The variation trend of the pixel mean value of each row of lamp points on the two sides of the vertical seam can be observed; integrating area B m2n2 Equally dividing the horizontal sub-integration region into a plurality of sub-integration regions with the height of 698/72 ≈ 10, numbering 1,2, … j … from top to bottom, taking the pixel mean value of each horizontal sub-integration region, and dividing the integration region B into two sub-integration regions m2n2 The pixel mean values of all the transverse sub-integration regions are connected into a line LH according to the number m2n2 And the variation trend of the pixel mean value of each row of lamp points on the two sides of the transverse seam can be observed.
Because the general results of w/s and h/t in the third step are not integers, the width of each vertical sub-integration area and the height of each horizontal sub-integration area are not the condition that the number of pixels of the camera is actually occupied by the lamp points; LW as shown in FIGS. 4 and 5 m1n1 And LH m2n2 Will be periodically changed, and due to measurement errors and calculation errors, LW m1n1 And LH m2n2 Each point in the line is slightly off the standard period, so for LW m1n1 And LH m2n2 Performing Gaussian filtering to obtain LW m1n1 And LH m2n2 The filtered waveform, the filter function is:
wherein
Is LW m1n1 The ordinate of the point on the filtered waveform corresponding to the ith vertical sub-integration area,
is LH m2n2 The filtered waveform corresponds to the jth transverse directionThe ordinate of the point of the sub-integrated area,
is the pixel mean of the ith vertical sub-integration region,
the pixel mean value of the jth transverse sub-integration area is obtained; r is a filter radius, the value of which is equal to 1-10 pixel size, preferably equal to 9 pixel size; σ is a standard deviation, σ 1-5, and preferably σ ═ 3.
Definition of LW m1n1 The waveform after filtering is a transverse periodic waveform; LH m2n2 The waveform after filtering is a longitudinal periodic waveform; each period of the transverse periodic waveform approximately corresponds to the period of the standard waveform; assuming that an intersection point between two adjacent modules in any row and two adjacent modules in the next row is P1(1022,1217) (which may be an upper intersection point or a lower intersection point), finding an extreme point a closest to P1(1022,1217) on the transverse periodic waveform; setting an extreme point A to correspond to the a-th period of the transverse periodic waveform, setting an extreme point B before the extreme point A to correspond to the B-th period of the transverse periodic waveform, and setting an extreme point C after the extreme point A to correspond to the C-th period of the transverse periodic waveform; averaging the ordinate of each point in the b-th period and the ordinate of the corresponding point in the c-th period to serve as the corrected ordinate of the corresponding point in the a-th period, and restoring the waveform in the a-th period; for example, as shown in fig. 4, the waveform after the a-th cycle repair is obtained by averaging the ordinate of the point B16 with the ordinate of the point C79 as the corrected ordinate of the point a49, …, the ordinate of the point B19 with the ordinate of the point C82 as the corrected ordinate of the point a52, … …, the ordinate of the point B46 with the ordinate of the point C109 as the corrected ordinate of the point a 76; the comparison result of the waveform data before and after the correction of the a-th period is shown in fig. 6; LH m2n2 The filtered waveform is a longitudinal periodic waveform; each period of the longitudinal periodic waveform approximately corresponds to the period of the standard waveform; assuming that the intersection point between two adjacent modules in any row and two adjacent modules in the previous row is P3(1024,1914), finding the extreme point F nearest to P3(1024,1914) on the standard waveform cycle, and setting the extreme point F corresponding to the vertical lineTo the f-th cycle of the periodic waveform; similarly, the waveform of the f-th cycle is repaired, and the comparison result of the waveform data before and after the correction of the f-th cycle is shown in fig. 7; wherein, the spine part deviating from the filtered waveform is the original waveform data, and the part attached to the standard waveform L is the corrected waveform data; assuming that the extreme point A corresponds to the 64 th vertical sub-integrated area (namely A64), dividing the corrected vertical coordinate of the corresponding point A64 corresponding to the extreme point A and the front corresponding point A63 and the rear two corresponding points A65 and A66 by the vertical coordinate before correction to obtain the repair correction coefficients of 4 rows of lamp points on both sides of the vertical joint; in the same way, the repair correction coefficients of 4 rows of lamp points on both sides of the transverse seam can be obtained; wherein the matrix of the correction coefficient for repairing the vertical seam is
The transverse seam repair correction coefficient matrix is
And finishing the calculation of the transverse seam and vertical seam repairing correction coefficients.
Correspondingly multiplying the total 4 restoration correction coefficients at the two sides of the vertical joint by the correction coefficients of the total 4 rows of lamp points at the two sides of the vertical joint aiming at any two adjacent modules in a row to obtain the final correction coefficients of the total 4 rows of lamp points at the two sides of the vertical joint; for any two adjacent modules in a column, multiplying the total 4 repair correction coefficients at two sides of the transverse seam by the correction coefficients of the total 4 rows of lamp points at two sides of the transverse seam to obtain the final correction coefficients of the total 4 rows of lamp points at two sides of the transverse seam; and sending the final correction coefficient to a control system to finish the luminance seam repair of the LED display unit.
The present invention is not limited to the above examples, z is in the range of 85% to 95%, x 1 In the range of 5% to 10%, x 2 In the range of 5% to 10%, y 1 In the range of 5% to 10%, y 2 Can be within the range of 5-10%. When z is 0.9, x 1 ＝0.1，x 2 ＝0.9，y 1 ＝0.1，y 2 When r is equal to 9 pixel sizes and σ is equal to 3, the effect is best; when z is less than 0.9, x 1 ≥0.1，x 2 When the correction value is less than or equal to 0.9, the data volume is possibly insufficient, and the correction effect is poor; when z is less than 0.9, y 1 ≥0.1，y 2 When the correction effect is less than or equal to 0.9, errors can be introduced into the data, even an overlapped part exists, and the correction effect is poor; when r is smaller than 9 pixels, the effect waveform is not obvious, and the period cannot be accurately positioned; when sigma is less than 3 and more than 3, the waveform is not standard, and the period cannot be accurately positioned.
Claims (7)
1. A method for correcting bright and dark lines of an LED display unit is characterized by comprising the following steps:
acquiring an image of an LED display unit by using a camera, and processing the image of the LED display unit to obtain pixel coordinates of a splicing and meeting point of each module;
aiming at any two adjacent modules in a row, when the vertical seams are corrected, the two sides of each vertical seam are taken to be outwards and transversely expanded by the width of z multiplied by w, and the middle (x) is taken in the longitudinal direction 1 ～x 2 ) Integration area A of height x h m1n1 All pixel values are used for luminance integration, and x is more than or equal to 5% 1 ≤10％，5％≤x 2 Less than or equal to 10 percent; for any two adjacent modules in a row, when correcting the transverse seam, taking the outward longitudinal extension z x h height of two sides of each transverse seam, and taking the middle (y) in the transverse direction 1 ～y 2 ) Integration region B of xw width m2n2 All pixel values are used for luminance integration, y is more than or equal to 5% 1 ≤10％，5％≤y 2 Less than or equal to 10 percent; z is more than or equal to 85% and less than or equal to 95%; w is the pixel width occupied by each module, and h is the pixel height occupied by each module;
will integrate the area A m1n1 Equally dividing the pixel into a plurality of vertical sub-integration areas according to the width w/s, and connecting the pixel mean values of all the vertical sub-integration areas into a line LW according to the sequence of numbering from left to right m1n1 (ii) a Wherein s is the number of transverse lamp points of the module; integrating region B m2n2 Equally dividing the horizontal sub-integration regions into a plurality of horizontal sub-integration regions according to the height h/t, and connecting all the horizontal sub-integration region pixel mean values into a line LH according to the sequence of numbering from top to bottom m2n2 (ii) a Wherein t is the number of the longitudinal lamp points of the module; using filter functions
For LW m1n1 And LH m2n2 Performing Gaussian filtering to obtain LW m1n1 And LH m2n2 A filtered waveform, wherein
Is LW m1n1 The ordinate of the point on the filtered waveform corresponding to the ith vertical sub-integration area,
is LH m2n2 The ordinate of the point on the filtered waveform corresponding to the jth transverse sub-integration zone,
is the pixel mean of the ith vertical sub-integration region,
the pixel mean value of the jth transverse sub-integration area is obtained; r is a filter radius, and the value of r is equal to 1-10 pixel sizes; sigma is a standard deviation, and sigma is 1-5;
definition of LW m1n1 The waveform after filtering is a transverse periodic waveform; searching an extreme point A on the standard waveform L closest to the junction point; setting an extreme point A to correspond to the a-th period of the transverse periodic waveform, setting an extreme point B before the extreme point A to correspond to the B-th period of the transverse periodic waveform, and setting an extreme point C after the extreme point A to correspond to the C-th period of the transverse periodic waveform; averaging the vertical coordinates of each point in the b-th period and the vertical coordinates of the corresponding point in the c-th period to serve as the corrected vertical coordinates of the corresponding point in the a-th period, and restoring the waveform of the a-th period; setting the corresponding point on the transverse periodic waveform corresponding to the extreme point A as A k Then, the corresponding point A is k Dividing the corrected vertical coordinate of n corresponding points on two sides of the vertical seam by the vertical coordinate before correction to obtain the repair correction coefficient of n rows of pixel points on two sides of the vertical seam; in the same way, the repairing correction coefficients of the pixel points on the two sides of the transverse seam can be obtained; n is more than or equal to 2 and less than or equal to 5;
for any two adjacent modules in a row, correspondingly multiplying the n restoration correction coefficients on the two sides of the vertical seam by the correction coefficients of the n rows of lamp points on the two sides of the vertical seam to obtain the final correction coefficients of the n rows of lamp points on the two sides of the vertical seam; and for any two adjacent modules in the row, correspondingly multiplying the m repairing correction coefficients on the two sides of the transverse seam by the correction coefficients of the m rows of lamp points on the two sides of the transverse seam to obtain the final correction coefficients of the m rows of lamp points on the two sides of the transverse seam, and correcting the pixel values of the lamp points on the two sides of the vertical seam and the transverse seam by adopting the final correction coefficients to finish the brightness repairing of the LED display unit.
2. The method according to claim 1, wherein the width w and the height h of the pixels occupied by the modules are calculated according to the size of the camera pixels occupied by the image of the LED display unit, the number of modules in each row and the number of modules in each column.
3. The method according to claim 1, wherein the width w and the height h of the pixel occupied by the module are calculated according to any adjacent four intersection point pixel coordinates.
4. The method according to claim 1, wherein the vertical seams are corrected by extending the two sides of each vertical seam outward and horizontally by 0.9 xw width and taking the middle (0.1-0.9) xh height of the integration area A in the longitudinal direction m1n1 All pixel values are used for luminance integration.
5. The method for correcting the bright and dark lines of the LED display unit according to claim 1, wherein the lateral seams are corrected by using an integration area B with the height of 0.9 x h and the width of the middle (0.1-0.9) x w, wherein the two sides of each lateral seam are extended outwards and longitudinally m2n2 All pixel values are used for luminance integration.
6. The method of claim 1, wherein the filter radius r is equal to 9 pixel size.
7. The method for correcting bright and dark lines of an LED display unit as claimed in claim 6, wherein σ is 3.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115482776A (en) * | 2022-10-31 | 2022-12-16 | 长春希达电子技术有限公司 | Method, system and device for correcting bright and dark lines of virtual pixel display screen and display system |
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| CN115482776A (en) * | 2022-10-31 | 2022-12-16 | 长春希达电子技术有限公司 | Method, system and device for correcting bright and dark lines of virtual pixel display screen and display system |
| CN115482776B (en) * | 2022-10-31 | 2023-02-10 | 长春希达电子技术有限公司 | Method, system and device for correcting bright and dark lines of virtual pixel display screen and display system |
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