CN102123287A - Method for acquiring luminance and chrominance parameters of LED display screen in non line-by-line manner - Google Patents

Abstract

The invention relates to a method for acquiring luminance and chrominance parameters of an LED display screen in a non line-by-line manner. The method comprises the following steps of: dividing a display screen containing M lines and N rows pixels into m areas; when a CCD (Charge-Couple Device) camera is used for acquiring the luminance and chrominance parameters of the display screen, displaying by controlling 0-2 lines of pixels of each area, and enabling other lines of pixels to be in a closed state till the luminance and chrominance parameters all the lines of pixels are acquired; equally dividing the acquired luminance and chrominance parameter data of pixels, which are simultaneously displayed in a single line, by using a line number N to obtain the luminance and chrominance parameter data of each pixel; and equally dividing the acquired luminance and chrominance parameter data of pixels, which are simultaneously displayed in double lines, by using the line number N, and then carrying out average segmentation on the luminance and chrominance data of two pixels of the two adjacent lines to obtain the luminance and chrominance parameter data of each pixel. In the invention, the position of the camera is unnecessary to adjust due to overlarge LED display screen so that the accuracy for acquiring and positioning is improved, and favorable practicality is achieved.

Description

Non-row-by-row and non-row-by-column LED display screen brightness and chromaticity parameter collection method

technical field

The invention relates to a method for collecting brightness and chromaticity parameters of LED displays, in particular to a non-row-by-row and non-column-by-row non-row-by-column method for collecting brightness and chromaticity parameters of LED display screens.

Background technique

LED large-screen displays are composed of hundreds of thousands or millions of independent LED light-emitting diodes. Due to the semiconductor characteristics of the LED device itself and the modular assembly method of the LED display, there are inconsistencies within the LED display module and between modules. Only when the difference in brightness and chromaticity between each pixel of the LED display device is collected, can it be uniformly corrected. The brightness and chromaticity collection of early display devices mainly used luminance meters and colorimeters. Using a luminance meter and a colorimeter to measure can have high measurement accuracy, but this method can only measure one point at a time, and the speed is slow. It is difficult to measure large-area LED display devices. At present, a new type of equipment used for LED brightness and chromaticity data collection is to use a CCD camera as the collection device.

Under normal circumstances, the number of pixels of a CCD camera is limited. For a LED display screen with a relatively small area, it can be photographed at one time. Each LED display pixel has a number of CCD pixels corresponding to the spot of the CCD. In this case, the photoelectric parameter data of each pixel of the LED display screen can be obtained accurately and effectively due to the interval between CCD pixels that are not affected by light signals. When the area of the LED display screen becomes larger, although each LED display pixel has a number of CCD pixels corresponding to the light spot of the CCD during acquisition, there is no CCD pixel interval that is not affected by the light signal between each light spot. , so that the light spots of each pixel of the LED display screen are mixed together, which is not conducive to accurate and effective acquisition of photoelectric parameter data. The method to solve this problem can be to divide the LED display screen into several areas, which are collected by the camera one by one and then stitched together. Finally, the brightness and chromaticity information of the display pixels in multiple acquisition areas are combined to form the bright color of the display pixels of the complete display screen. degree information. However, since the LED display screen can be spliced infinitely, and the display screen can be composed of up to millions of pixels, the number of pixels displayed in the display area of each acquisition is limited, and the acquisition needs to be repeated dozens or even hundreds of times, and each movement of the camera may cause This leads to the appearance of human error, so the existing acquisition methods are difficult to meet the acquisition requirements of the brightness and chromaticity information of the LED display screen.

Contents of the invention

The present invention provides a non-row-by-row and non-row-by-column LED display screen that can complete the brightness and chromaticity data collection of a large LED screen without changing the original position of the camera, and can accurately and effectively obtain the photoelectric parameter data of each pixel on the screen Brightness and chromaticity parameter collection method.

In order to solve the above technical problems, the non-row-by-row and non-row-by-column LED display screen brightness and chromaticity parameter acquisition method of the present invention can adopt the following three technical solutions:

Technical solution one

The non-row-by-row and non-column-by-row LED display screen brightness and chromaticity parameter collection method of the present invention comprises the following steps:

(1), the display screen comprising M rows and N columns of pixels is divided into m regions, each region contains N columns of pixels, and the sum of the number of pixel rows in all regions is M;

(2) Use a CCD camera to collect the brightness and chromaticity parameters of the display screen; when collecting each time, control 0 to 2 rows of pixels in each area to display, while the remaining rows of pixels are in the off state, and the displayed values are displayed in different acquisitions The pixels are in different rows until the brightness and chromaticity parameters of all rows of pixels are collected;

(3), the brightness and chromaticity parameter data of the pixel brightness and chromaticity parameter data that the single row that gathers is equally divided with column number N to display simultaneously, obtain the brightness and chromaticity parameter data of each pixel in the single row of pixels; data, and then averagely divide the brightness and chromaticity data of two pixels in two adjacent rows to obtain the brightness and chromaticity parameter data of each pixel in the two rows of pixels.

In the present invention, each area has only a single row (1 row) or double row (2 rows) of pixels to display each time of acquisition, and there is a CCD pixel interval that is not affected by the light signal between the rows, and the comparison of the spot division of each row Therefore, it is beneficial to obtain the photoelectric parameter data of each pixel accurately and effectively. In this way, the CCD camera does not need to adjust the position of the camera because the LED display screen is too large, which improves the accuracy of acquisition and positioning, and has good practicability.

Technical solution two

The non-row-by-row and non-column-by-row LED display screen brightness and chromaticity parameter collection method of the present invention comprises the following steps:

(1), the display screen comprising M rows and N columns of pixels is divided into n regions, each region contains M rows of pixels, and the sum of the number of pixel columns in all regions is N;

(2) Use a CCD camera to collect the brightness and chromaticity parameters of the display screen; when collecting each time, control 0 to 2 columns of pixels in each area to display, while the remaining columns of pixels are in the off state, and the displayed values are displayed during different acquisitions The pixels are in different columns until the brightness and chrominance parameters of all columns of pixels are collected;

(3), the brightness and chromaticity parameter data of the pixel displaying simultaneously of the single column that is collected with row number M equally, obtain the brightness and chromaticity parameter data of each pixel in the single column pixel; parameter data, and then averagely divide the brightness and chrominance data of two pixels in two adjacent columns to obtain the brightness and chrominance parameter data of each pixel in the two columns of pixels.

In the present invention, each region has only a single row (1 row) or a double row (2 rows) of pixels to display each time it is collected, and there is a CCD pixel interval that is not affected by the light signal between the rows, and the comparison of the spot division of each row Clear, and thus conducive to accurate and effective access to photoelectric parameter data. In this way, the CCD camera does not need to adjust the position of the camera because the LED display screen is too large, which improves the accuracy of acquisition and positioning, and has good practicability.

Technical solution three:

Considering the comprehensive influence of the screen, the non-row-by-row and non-row-by-column LED display screen brightness parameter acquisition method of the present invention can also include the following steps:

(1), the display screen comprising M rows and N columns of pixels is divided into m regions, each region contains N columns of pixels, and the sum of the number of pixel rows in all regions is M;

(2) Use a CCD camera to collect the brightness and chromaticity parameters of the display screen; when collecting each time, control 0 to 2 rows of pixels in each area to display, while the remaining rows of pixels are in the off state, and the displayed values are displayed in different acquisitions The pixels are in different rows until the brightness and chromaticity parameters of all rows of pixels are collected;

(3), the brightness and chromaticity parameter data of the pixel brightness and chromaticity parameter data that the single row that gathers is equally divided with column number N to display simultaneously, obtain the brightness and chromaticity parameter data of each pixel in the single row of pixels; data, and then averagely divide the luminance and chrominance data of 2 pixels in two adjacent rows to obtain the luminance and chromaticity parameter data of each pixel in the two rows of pixels;

(4), the display screen comprising M rows and N columns of pixels is divided into n regions, each region contains M rows of pixels, and the sum of the number of pixel columns in all regions is N;

(5) Use a CCD camera to collect the brightness and chromaticity parameters of the display screen; when collecting each time, control 0 to 2 columns of pixels in each area to display, while the remaining columns of pixels are in a closed state, and the displayed values are displayed during different acquisitions The pixels are in different columns until the brightness and chrominance parameters of all columns of pixels are collected;

(6), the brightness and chromaticity parameter data of the pixel brightness and chromaticity parameter data that the single column that gathers with row number M divides collection simultaneously, obtains the brightness and chromaticity parameter data of each pixel in the single column pixel; data, and then averagely divide the brightness and chromaticity data of 2 pixels in two adjacent columns to obtain the brightness and chromaticity parameter data of each pixel in the double-column pixels;

(7), the brightness and chromaticity data of each pixel obtained in step (4) and step (6) are respectively added and then averaged to obtain the average brightness and chromaticity parameter data of each pixel on the display screen.

Considering the comprehensive influence of the screen, the comprehensive result can be obtained by combining the brightness and chromaticity parameter data of the non-progressive LED display screen and the non-column-by-column LED display screen brightness and chromaticity parameter data. The specific method is to average the brightness and chromaticity parameter data of each pixel of the non-progressive LED display screen and the brightness and chromaticity parameter data of each pixel of the non-column-by-column LED display screen to obtain a comprehensive non-progressive non-column-by-row LED display screen. Brightness and chrominance parameter data. The test results show that the data obtained by averaging the brightness and chromaticity parameter data of each pixel of the non-row-by-row LED display screen and the brightness and chromaticity parameter data of each pixel of the non-row-by-column LED display screen is closer to the effect when the entire screen pixels are lit at the same time , so the data obtained are more accurate.

Beneficial effects: the present invention does not need to adjust the position of the camera because the LED display screen is too large, improves the accuracy of acquisition and positioning, and has good practicability. At the same time, since several columns or rows are displayed during collection, it is closer to the effect of full-screen lighting, and the data has better adaptability.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram of the acquisition process of an LED display screen with a relatively small area in the background technology of the present invention.

Fig. 2 is a schematic diagram of the collection process of the LED display screen with relatively large area in the background technology of the present invention.

FIG. 3 is a schematic diagram of the specific working process of the method for collecting brightness and chromaticity parameters of a non-progressive LED display screen.

FIG. 4 is a schematic diagram of the specific working process of the non-column-by-column method for collecting brightness and chromaticity parameters of the LED display screen.

5 and 6 are schematic diagrams of the specific working process of Embodiment 1 of the present invention.

7 and 8 are schematic diagrams of the specific working process of Embodiment 2 of the present invention.

Fig. 9, Fig. 10 and Fig. 11 are schematic diagrams of the specific working process of Embodiment 3 of the present invention.

Fig. 12, Fig. 13 and Fig. 14 are schematic diagrams of the specific working process of Embodiment 4 of the present invention.

Detailed ways

1 in the figure represents the LED display screen to be collected, 2 represents the mapping of each pixel of the LED display screen on the camera CCD array, a represents the light entering the camera, 3 represents the pixels on the LED display screen (emphasis on the lighting state), 4 Indicates the corresponding pixel spot mapped on the camera CCD array to display screen pixel 3, and 5 indicates the acquisition array of the CCD camera.

In general, the number of pixels of a CCD camera is limited, and it can be photographed at one time for a relatively small LED display screen. As shown in Figure 1, it can be seen that each LED display pixel has a number of CCD pixels corresponding to the light spot of the CCD. Obtain the photoelectric parameter data of each pixel of the LED display screen.

But sometimes we face such a situation, that is, the area of the LED display screen is relatively large, and we face such a problem during collection. As shown in Figure 2, it can be seen that although each LED display pixel has a number of CCD pixels corresponding to the light spot of the CCD, there is no CCD pixel interval that is not affected by the light signal between each light spot, so The light spots of each pixel of the LED display screen are mixed together, which is not conducive to accurate and effective acquisition of photoelectric parameter data.

The content of the present invention is mainly divided into a non-row-by-row LED display screen brightness and chromaticity parameter collection method and a non-column-by-column LED display screen brightness and chromaticity parameter collection method.

The specific working process of the non-progressive LED display screen brightness and chromaticity parameter acquisition method is shown in Figure 3.

For a display screen with M rows and N columns, it can be divided into m regions, each region contains N columns of pixels, and the number of rows of pixels in each region can be equal or different, but the total number of rows of pixels in m regions is one must be equal to M (as shown in FIG. 3, M=N=8, m=2).

Assume that each area has p _i rows and N columns (1≤i≤m), that is, the first area includes p ₁ row and N columns of pixels, the second area includes p ₂ rows and N columns of pixels...the mth area includes p _m rows and N columns pixel, then p ₁ +p ₂ +...+p _m =M. p ₁ , p ₂ , . . . , p _m may be equal or unequal (as shown in FIG. 3 , p ₁ =p ₂ =4).

As shown in Figure 3, the specific working process of the non-progressive LED display screen brightness and chromaticity parameter acquisition method is as follows:

In the first acquisition, the first row of pixels in each area of the m regions of the LED display screen is displayed, and the remaining rows of pixels are in the off state under the control of the display control system, that is, at this time, the first row, p ₁ +1 row, p ₁ +p ₂ +1 row of pixels...display, so that on the CCD array of the camera, there is a CCD pixel interval that is not affected by the light signal between the rows, and the spot division of each row is relatively clear. The luminance and chromaticity data of pixels can be equally divided by the number of columns N, so that the luminance and chromaticity data of each pixel on these rows can be obtained. Then carry out the next round of collection, the second row of pixels in the m areas of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, the second row, p ₁ +2 row , p ₁ +p ₂ +2 rows of pixels...display, so that on the CCD array of the camera, the light spots of each row are relatively clearly divided, and the data of each pixel between rows can be equally divided by the number of columns N, so that these rows can be obtained The brightness and chromaticity data of each pixel on the LED display screen; by analogy, the data collection of the entire display screen is completed, and the brightness and chromaticity parameter data results of each pixel of the LED display screen are obtained.

In this process, sometimes in order to speed up, the method of simultaneously displaying two rows of pixels in one area can be used, of course, the acquisition accuracy is sacrificed, but in this way, the acquisition speed will be doubled. In the first acquisition, the pixels of the first row and the second row in the m areas of the LED display screen are displayed, and the pixels of the remaining rows are all in the off state under the control of the display control system, that is, the first row, the second row, the second row p ₁ + 1 line, p ₁ + 2 line, p ₁ + p ₂ + 1 line, p ₁ + p ₂ + 2 line of pixels...display, so that on the CCD array of the camera, between lines and lines in each area There is a CCD pixel interval that is not affected by the light signal, and the spot segmentation of each row is relatively clear, and there is an overlap between rows in an area, so that the data of each pixel between two rows in the area can be used by the number of columns N is divided equally, so that the brightness and chrominance data of 2 pixels in adjacent rows on these rows can be obtained, and the average segmentation can be performed, and the accuracy will be reduced to a certain extent; for the next round of collection, the third row, the fourth row, p ₁ + 3 lines, p ₁ + 4 lines, p ₁ + p ₂ + 3 lines, p ₁ + p ₂ + 4 lines of pixels... display, so that on the CCD array of the camera, between lines in each area There is a CCD pixel interval that is not affected by the light signal, and the spot segmentation of each row is relatively clear, and there is an overlap between rows in an area, so that the data of each pixel between two rows in the area can be used in the number of columns N In this way, the brightness and chromaticity data of two adjacent pixels on these rows can be obtained, and the average segmentation can be performed, and the accuracy is reduced; thus, the brightness and chromaticity data of each pixel on these rows can be obtained; and so on, Complete the data acquisition of the entire display screen. Obtain the brightness and chromaticity parameter data results of each pixel of the LED display screen.

The specific working process of the non-column-by-column LED display screen brightness and chromaticity parameter acquisition method is shown in Figure 4.

For a display screen with M rows and N columns, it can be divided into n areas, each area contains M rows of pixels, and the number of columns of pixels in each area can be equal or different, but the total number of columns of pixels in n areas Must be equal to M (as shown in FIG. 4, M=N=8, n=2).

Assume that each area is M rows q _j columns (1≤i≤n), that is, the first area includes M rows q ₁ column of pixels, the second area includes M rows q ₂ columns of pixels...the nth area includes M rows q _n columns pixel, then q ₁ +q ₂ +...+q _n =N. q ₁ , q ₂ , ..., q _n may be equal or unequal (as shown in FIG. 4 , q ₁ =q ₂ =4).

As shown in Figure 4, the specific working process of the non-column-by-column LED display screen brightness and chromaticity parameter acquisition method is as follows:

In the first acquisition, the first column of pixels in the n areas of the LED display screen is displayed, and the remaining columns of pixels are in the off state under the control of the display control system, that is, at this time, the first column, q ₁ + 1 column, q ₁ +q ₂ +1 column of pixels...display, so that on the CCD array of the camera, there is a CCD pixel interval between the columns that is not affected by the light signal. The data can be equally divided by the number of rows M, so that the brightness and chromaticity data of each pixel on these columns can be obtained; Under the control of the system, they are all in the off state, that is, at this time, the pixels in the second column, q ₁ + 2 column, q ₁ + q ₂ + 2 column... are displayed, so that on the CCD array of the camera, the comparison of the spot division of each column Specifically, the data of each pixel between columns can be equally divided by the number of rows M, so as to obtain the brightness and chromaticity data of each pixel on these columns; by analogy, the data collection of the entire display screen is completed. Obtain the brightness and chromaticity parameter data results of each pixel of the LED display screen.

In this process, sometimes in order to speed up, you can use the method of displaying two columns of pixels at the same time in one area. Of course, the acquisition accuracy is sacrificed, but in this way, the acquisition speed will be doubled. In the first acquisition, the pixels in the first column and the second column in the n areas of the LED display screen are displayed, and the pixels in the remaining columns are all in the off state under the control of the display control system, that is, the first column and the second column are at this time , q ₁ + 1 column, q ₁ + 2 column, q ₁ + q ₂ + 1 column, q ₁ + q ₂ + 2 column of pixels... display, so that on the CCD array of the camera, the columns and columns in each area There is a CCD pixel interval that is not affected by the optical signal, the spot segmentation of each column is relatively clear, and there is an overlap between columns in an area, so that the data of each pixel between the two columns in the area can be used in rows Number M to divide equally, so that the brightness and chrominance data of 2 pixels in adjacent columns on these columns can be obtained, and the average segmentation can be performed, and the accuracy will be reduced to a certain extent; then the next round of collection, the third column and the fourth column , q ₁ + 3 columns, q ₁ + 4 columns, q ₁ + q ₂ + 3 columns, q ₁ + q ₂ + 4 columns of pixels... display, so that on the CCD array of the camera, the columns and columns in each area There is a CCD pixel interval that is not affected by the optical signal, the spot segmentation of each column is relatively clear, and there is an overlap between columns in an area, so that the data of each pixel between the two columns in the area can be used in rows Number M to divide equally, so as to obtain the brightness and chromaticity data of two pixels in adjacent columns on these columns, the same average division can be performed, and the accuracy will be reduced; thus, the brightness and chromaticity data of each pixel on these rows can be obtained; By analogy, the data acquisition of the entire display screen is completed. Obtain the brightness and chromaticity parameter data results of each pixel of the LED display screen.

It is also possible to display one row or one column of pixels in some areas, two rows or columns of pixels in some areas, and no pixels in other areas during each acquisition.

Example 1

For a display screen with 8 rows and 8 columns, it can be divided into 4 regions, each region has 2 rows and 8 columns, and the number of rows in each region of the 4 regions is equal.

As shown in Figure 5, during the first acquisition, the first row of pixels in the four regions of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, at this time the first row, 3 lines, 5 lines of pixels...display, so that on the CCD array of the camera, there is a CCD pixel interval that is not affected by the light signal between the lines, and the spot division of each line is relatively clear, and the data of each pixel between the lines The number of columns can be divided equally by 8, so that the brightness and chrominance data of each pixel on these rows can be obtained.

As shown in Figure 6, the second round of acquisition is carried out, the second row of pixels in the 4 regions of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, at this time the second row, 4 rows, 6 rows of pixels...display, so that on the CCD array of the camera, the light spots of each row are relatively clearly divided, and the data of each pixel between rows can be equally divided by the number of columns 8, so that the data of each pixel on these rows can be obtained Brightness and chromaticity data; and so on, to complete the data acquisition of the entire display screen. Obtain the data results of the brightness and chromaticity parameters of the LED display screen.

Example 2

For a display screen with 8 rows and 8 columns, it can be divided into 4 regions, each region has 2 columns and 8 rows, and the number of columns in each region of the 4 regions is equal.

As shown in Figure 7, during the first acquisition, the first column of pixels in the four regions of the LED display screen is displayed, and the remaining columns of pixels are in the off state under the control of the display control system, that is, at this time the first column, 3 columns, 5 columns of pixels...display, so that on the CCD array of the camera, there is a CCD pixel interval that is not affected by the optical signal between the columns, and the spot division of each column is relatively clear, and the data of each pixel between the columns The number of rows can be divided equally by 8, so that the brightness and chrominance data of each pixel on these columns can be obtained.

As shown in Figure 8, the second round of acquisition is carried out, the second row of pixels in the 4 regions of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, at this time the second row, 4 columns, 6 columns of pixels...display, so that on the CCD array of the camera, the light spots of each column are relatively clearly divided, and the data of each pixel between columns can be equally divided by the number of rows 8, so that the data of each pixel on these columns can be obtained Brightness and chromaticity data; and so on, to complete the data acquisition of the entire display screen. Obtain the data results of the brightness and chromaticity parameters of the LED display screen.

Example 3

For a display screen with 8 rows and 8 columns, it can be divided into 3 areas, and each area has a maximum of 3 rows and 8 columns. The number of rows in each area of the 3 areas is not equal, but these 3 areas The total number of rows must be equal to 8.

As shown in Figure 9, during the first acquisition, the first row of pixels in the three regions of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, at this time the first row, 4 lines, 7 lines of pixels...display, so that on the CCD array of the camera, there is a CCD pixel interval that is not affected by the light signal between the lines, and the spot division of each line is relatively clear, and the data of each pixel between the lines The number of columns can be divided equally by 8, so that the brightness and chrominance data of each pixel on these rows can be obtained.

As shown in Figure 10, the second round of acquisition is carried out, the second row of pixels in the three regions of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, at this time the second row, 5 rows, 8 rows of pixels...display, so that on the CCD array of the camera, the light spots of each row are relatively clearly divided, and the data of each pixel between rows can be equally divided by the number of columns 8, so that the data of each pixel on these rows can be obtained Brightness data.

As shown in Figure 11, the third round of acquisition is carried out, the third row of pixels in the three regions of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, at this time the third row, 6 rows of pixels...display, so that on the CCD array of the camera, the light spots of each row are relatively clearly divided, and the data of each pixel between rows can be equally divided by the number of columns 8, so that the brightness and chromaticity data of each pixel on these rows can be obtained ; By analogy, the data acquisition of the entire display screen is completed. Obtain the data results of the brightness and chromaticity parameters of the LED display screen.

Example 4

For a display screen with 8 rows and 8 columns, it can be divided into 3 areas, and each area has a maximum of 3 columns and 8 rows. The number of columns in each area of the 3 areas is not equal, but these 3 areas The total number of columns must be equal to 8.

As shown in Figure 12, during the first acquisition, the first column of pixels in the three regions of the LED display screen is displayed, and the remaining columns of pixels are all in the off state under the control of the display control system, that is, at this time the first column, 4 columns, 7 columns of pixels...display, so that on the CCD array of the camera, there is a CCD pixel interval that is not affected by the optical signal between the columns, and the spot division of each column is relatively clear, and the number of pixels between the columns

The data can be equally divided by the number of rows of 8, so that the brightness and chrominance data of each pixel on these columns are obtained;

As shown in Figure 13, the second round of acquisition is carried out, the second row of pixels in the three regions of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, at this time the second row, 5-column, 8-column pixels...display, so that on the CCD array of the camera, the light spots of each column are relatively clearly divided, and the data of each pixel between columns can be equally divided by the number of rows 8, so that the data of each pixel on these columns can be obtained Brightness data.

As shown in Figure 14, the third round of acquisition is performed, the third column of pixels in the three areas of the LED display screen is displayed, and the remaining columns of pixels are all in the off state under the control of the display control system, that is, at this time the third column, 6 columns of pixels...display, so that on the CCD array of the camera, the light spots of each column are relatively clearly divided, and the data of each pixel between columns can be divided equally by the number of rows 8, so that the brightness and chromaticity data of each pixel on these columns can be obtained ; By analogy, the data acquisition of the entire display screen is completed. Obtain the data results of the brightness and chromaticity parameters of the LED display screen.

Example 5

For a display screen with 8 rows and 8 columns, it can be divided into 4 regions, each region has 2 rows and 8 columns, and the number of rows in each region of the 4 regions is equal.

Carry out non-column-by-column acquisition, as shown in Figure 5, at the first acquisition, the first row of pixels in the 4 areas of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system. That is, at this time, the pixels in the first row, third row, and fifth row... are displayed. In this way, on the CCD array of the camera, there is a CCD pixel interval that is not affected by the optical signal between the rows, and the spot division of each row is relatively clear. The data of each pixel between the rows can be equally divided by the number of columns of 8, so as to obtain the brightness and chrominance data of each pixel on these rows.

As shown in Figure 6, the second round of acquisition is carried out, the second row of pixels in the 4 regions of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, at this time the second row, 4 rows, 6 rows of pixels...display, so that on the CCD array of the camera, the light spots of each row are relatively clearly divided, and the data of each pixel between rows can be equally divided by the number of columns 8, so that the data of each pixel on these rows can be obtained Brightness and chromaticity data; and so on, to complete the data acquisition of the entire display screen. Obtain the non-progressive brightness and chromaticity parameter data results of the LED display screen.

The non-column-by-column collection is performed below, as shown in Figure 7, when the first collection is made, the first column of pixels in the 4 areas of the LED display screen is displayed, and the remaining columns of pixels are all in the off state under the control of the display control system , that is, the pixels in the first column, the third column, and the fifth column are displayed at this time. In this way, on the CCD array of the camera, there is a CCD pixel interval that is not affected by the optical signal between the columns, and the spot division of each column is relatively clear. , the data of each pixel between the columns can be equally divided by the number of rows 8, so that the brightness and chrominance data of each pixel on these columns can be obtained.

As shown in Figure 8, the second round of acquisition is carried out, the second row of pixels in the 4 regions of the LED display screen is displayed, and the remaining rows of pixels are all in the off state under the control of the display control system, that is, at this time the second row, 4 columns, 6 columns of pixels...display, so that on the CCD array of the camera, the light spots of each column are relatively clearly divided, and the data of each pixel between columns can be equally divided by the number of rows 8, so that the data of each pixel on these columns can be obtained Brightness and chromaticity data; and so on, to complete the data acquisition of the entire display screen. Obtain the non-column-by-column brightness and chromaticity parameter data results of the LED display screen.

The non-row-by-line brightness and chromaticity parameter data results of the front LED display screen and the non-column brightness and chromaticity parameter data results of the LED display screen are averaged according to the effect data of each primary color of each pixel, and the final brightness and chromaticity parameter data results of the LED display screen are obtained. .

Claims (3)

1. the non-non-line by line LED display curtain light tone degree parameter collecting method by row is characterized in that comprising the steps:

(1), the display screen that will comprise the capable N row of M pixel is divided into m zone, all comprise N row pixel in each zone, and the number of lines of pixels sum of All Ranges is M;

(2), adopt the CCD camera that the light tone degree parameter of display screen is gathered; During each the collection, wherein 0～2 row pixel of controlling each zone shows, and the remaining row pixel is in closed condition, and the pixel different rows that shows when homogeneous is gathered, and finishes until the light tone degree parameter acquisition of all row pixels;

(3), divide the pixel light tone degree supplemental characteristic that the single file of collection shows simultaneously equally, obtain the light tone degree supplemental characteristic of each pixel in the single row of pixels with columns N; Divide the pixel light tone degree supplemental characteristic that the duplicate rows of collection shows simultaneously equally with columns N, and then the light tone degrees of data of 2 pixels of adjacent two row is once on average cut apart, obtain the light tone degree supplemental characteristic of each pixel in the duplicate rows pixel.

2. the non-non-line by line LED display curtain light tone degree parameter collecting method by row is characterized in that comprising the steps:

(1), the display screen that will comprise the capable N row of M pixel is divided into n zone, all comprise the capable pixel of M in each zone, and the pixel columns sum of All Ranges is N;

(2), adopt the CCD camera that the light tone degree parameter of display screen is gathered; During each the collection, wherein 0～2 row pixel of controlling each zone shows, and all the other row pixels are in closed condition, and the pixel different lines that shows when homogeneous is gathered, and finishes until the light tone degree parameter acquisition of all row pixels;

(3), with the single-row pixel light tone degree supplemental characteristic that shows simultaneously that line number M divides collection equally, obtain the light tone degree supplemental characteristic of each pixel in the single column of pixels; Divide the light tone degree supplemental characteristic of the pixel that the biserial of collection shows simultaneously equally with line number M, and then the light tone degrees of data of 2 pixels of adjacent two row is once on average cut apart, obtain the light tone degree supplemental characteristic of each pixel in the biserial pixel.

3. the non-non-line by line LED display curtain light tone degree parameter collecting method by row is characterized in that comprising the steps:

(1), the display screen that will comprise the capable N row of M pixel is divided into m zone, all comprise N row pixel in each zone, and the number of lines of pixels sum of All Ranges is M;

(2), adopt the CCD camera that the light tone degree parameter of display screen is gathered; During each the collection, wherein 0～2 row pixel of controlling each zone shows, and the remaining row pixel is in closed condition, and the pixel different rows that shows when homogeneous is gathered, and finishes until the light tone degree parameter acquisition of all row pixels;

(3), divide the pixel light tone degree supplemental characteristic that the single file of collection shows simultaneously equally, obtain the light tone degree supplemental characteristic of each pixel in the single row of pixels with columns N; Divide the pixel light tone degree supplemental characteristic that the duplicate rows of collection shows simultaneously equally with columns N, and then the light tone degrees of data of 2 pixels of adjacent two row is once on average cut apart, obtain the light tone degree supplemental characteristic of each pixel in the duplicate rows pixel;

(4), the display screen that will comprise the capable N row of M pixel is divided into n zone, all comprise the capable pixel of M in each zone, and the pixel columns sum of All Ranges is N;

(5), adopt the CCD camera that the light tone degree parameter of display screen is gathered; During each the collection, wherein 0～2 row pixel of controlling each zone shows, and all the other row pixels are in closed condition, and the pixel different lines that shows when homogeneous is gathered, and finishes until the light tone degree parameter acquisition of all row pixels;

(6), with the single-row pixel light tone degree supplemental characteristic that shows simultaneously that line number M divides collection equally, obtain the light tone degree supplemental characteristic of each pixel in the single column of pixels; Divide the pixel light tone degree supplemental characteristic that the biserial of collection shows simultaneously equally with line number M, and then the light tone degrees of data of 2 pixels of adjacent two row is once on average cut apart, obtain the light tone degree supplemental characteristic of each pixel in the biserial pixel;

(7), step (4) and step (6) are obtained the light tone degrees of data of each pixel, and addition is average more respectively, obtains the average light tone degree supplemental characteristic of each pixel on the display screen.

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