CN117912383B - Method for testing brightness uniformity of flat panel display equipment - Google Patents
Method for testing brightness uniformity of flat panel display equipment Download PDFInfo
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Abstract
The invention discloses a method for testing brightness and color uniformity of flat panel display equipment, which relates to the technical field of optical measurement and comprises the following steps: fixing the flat panel display device to be tested to the turntable fixture; outputting full white field/monochromatic field signals meeting the resolution requirements to display equipment and displaying normally; calculating the actual width size and the actual height size of an effective display screen of the flat panel display device in the image; controlling the brightness detector and the machine vision collector to move to 3 times of the actual height dimension of the screen from the screen; calculating the distance between the center point in the image and the leftmost upper corner of the effective display picture of the screen; calculating the coordinates of each to-be-measured point or the offset relative to the initial position according to the number of to-be-measured points, the actual width dimension and the actual height dimension of the effective display screen, and finally guiding the servo guide rail to align and test according to the positions of each to-be-measured point; the invention greatly improves the test efficiency and the accuracy of the bright color uniformity result on the whole.
Description
Technical Field
The invention relates to the technical field of optical measurement, in particular to a method for testing brightness and color uniformity of flat panel display equipment.
Background
With the development of flat panel display equipment technology, the requirements of people on the display effect and the visual experience of the flat panel display equipment are higher and higher, however, the main technical indexes affecting the display effect and the visual experience of the flat panel display equipment are the brightness uniformity parameters, and the brightness uniformity results of the flat panel display equipment are directly affected by the brightness uniformity results and the visual experience of clients, so that the full detection and the result evaluation of the brightness uniformity of the flat panel display equipment are more focused in the manufacturing process of the flat panel display equipment, such as the display equipment manufacturers such as the groggy, the glory and the millet are more harsh on the brightness uniformity detection requirements of the flat panel display equipment, and the main factors affecting the accuracy and the efficiency of experimental test results are that the accuracy of the real size of the effective display screen of the flat panel display equipment is manually measured, the initial position alignment and the alignment accuracy of coordinates of all points to be tested are improved, and the accuracy and the test efficiency of the brightness uniformity test of the flat panel display equipment are rack brains and a full idea.
The existing flat panel display equipment brightness uniformity test system relates to a functional module which mainly comprises a brightness detector, image generating equipment, a PC host, a turntable clamp and a servo mechanism. The brightness and color detector is fixed on the Z axis of the servo mechanism and used for collecting brightness and color parameters on the effective display screen; the image generating device is used for outputting full white field/single color field graphic signals meeting the resolution requirements to the display device; the PC host device is used for controlling the brightness detector to collect data, extracting, processing and controlling the image generating device to switch output signals to the display device machine and other data processing and calculating; the turntable clamp is used for fixing the flat panel display equipment in a standard tool state to be tested; the servo structure guide rail aligns the position of the to-be-measured point due to the movement of the bright color detector.
In the traditional testing method, the effective display size of the measuring screen is mainly manually measured, the measuring precision and efficiency are relatively low, and the testing precision deviation directly influences the calculation of the position coordinates of the subsequent point to be tested; the initial position alignment process of the brightness uniformity test is mainly finished by manually controlling a servo mechanism, and the initial position alignment is time-consuming and is easy to generate alignment deviation; the alignment of the positions of each to-be-measured point mainly depends on the control of the servo mechanism to shift one by one, the length of a guide rail of the servo mechanism is generally 4-5 meters or even longer, and the movement precision of the servo mechanism cannot be corrected and is difficult to ensure.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a method for testing the brightness uniformity of flat panel display equipment, which greatly improves the testing efficiency and the accuracy of the brightness uniformity result on the whole.
In order to achieve the above purpose, the invention adopts the following technical scheme: a method for testing the brightness uniformity of a flat panel display device comprises the following steps:
Step 1, moving a flat panel display device to be measured to a turntable clamp, adjusting the posture of the flat panel display device on the turntable clamp, enabling the effective display screen plane to be kept coincident with the scale plane of a measuring and calibrating tool in the vertical direction, and fixing the flat panel display device; the measuring calibration tool is always fixed in the testing process, the scale plane of the measuring calibration tool is always parallel to an intersecting plane formed by a Z axis and a Y axis of a servo mechanism, a machine vision collector and a bright color detector are fixed on the Z axis of the servo mechanism, the front end plane of the machine vision collector and the front end plane of the bright color detector fixed on the Z axis are always overlapped in the vertical direction, the relative positions of the machine vision collector and the bright color detector are always fixed, and the machine vision collector and the bright color detector are integrally displaced along with the movement adjustment of the servo mechanism;
Step 2, the PC host automatically controls the servo mechanism to adjust the vertical distance between the forefront end face of the lens of the machine vision collector, which is fixed on the Z axis, and the effective light-emitting plane of the flat panel display device to be S, and the corresponding position is the initial position on the X axis of the servo mechanism, wherein a limiting block on the servo mechanism can ensure the accuracy of the distance S;
step 3, the PC host sends an instruction to automatically control the image generating device to output a full-white image signal meeting the test resolution requirement to the flat panel display device, and the flat panel display device normally displays a full-white image;
Step 4, automatically controlling a machine vision collector on a Z-axis fixed servo guide rail by a PC host, moving to the position of all effective display screens of the flat panel display equipment and all scale surfaces of a measuring and calibrating tool at the lower left corner, automatically controlling a liquid lens by the PC host to focus in real time and feed back the position state of the liquid lens in the moving process, automatically controlling the machine vision collector by the PC host to complete one-time image collection, automatically calculating pixels occupied by the actual size of the measuring and calibrating tool in an image through an algorithm, and calculating the actual width size and the actual height size of the effective display screens of the flat panel display equipment in the image by taking the actual size as a measuring reference;
Step 5, the PC host automatically controls the geometric center of the front end of the lens of the bright color detector fixed on the Z axis of the servo mechanism to be opposite to the geometric center of an effective display picture of the flush panel display device, the PC host automatically adjusts the X axis of the servo mechanism to operate to the initial position of the servo mechanism, meanwhile, the actual height dimension value of the 3 times of screen is transmitted to the servo mechanism, the servo mechanism is guided to adjust the bright color detector and the machine vision collector on the Z axis, the servo mechanism is automatically moved to a standard distance which is 3 times of the actual height dimension of the screen from the panel display device along the X axis, and the liquid lens automatically completes focusing in the moving process of the machine vision collector;
Step 6, automatically controlling a machine vision collector by a PC host to finish image collection once again at a position which is 3 times of the standard distance of the actual height dimension of the screen from the effective display screen of the flat panel display device, measuring pixels occupied by the actual dimension of the calibration tool in a calculated image, taking the calculated pixels as measurement reference to calculate the distance between the image center point in an image picture and the leftmost upper corner of the effective display screen of the flat panel display device, guiding a bright color detector on a Z axis of a servo mechanism to be opposite to the leftmost upper corner of the effective display screen of the flat panel display device, and finishing initial position alignment before testing of the bright color detector;
step 7, the system automatically calculates the position coordinates of each to-be-measured point or the offset relative to the initial position according to the number of to-be-measured points, the actual width dimension, the actual height dimension and other parameters of the effective display screen, finally automatically guides the servo mechanism to align the brightness detector on the Z axis according to the positions of each to-be-measured point, controls the brightness detector by the PC to complete brightness and chromaticity data acquisition, and completes uniformity test;
and 8, the PC host sends an instruction to automatically control the image generating device to sequentially output red, green and blue monochromatic field image signals meeting the test resolution requirements to the flat panel display device and normally display the signals, and the step 7 is repeated every time a monochromatic field image is output, so that all uniformity tests are sequentially completed.
As a further improvement of the present invention, in the step 2, the distance S is set in a range of 10 mm.ltoreq.S.ltoreq.50 mm.
As a further improvement of the present invention, in step 4, the length-width dimension of the effective display screen of the flat panel display device in the image is calculated as follows:
The actual length DeltaL of the calibration tool in the image is calculated to occupy the number n of pixels, the actual physical size represented by each pixel in the image of the machine vision collector is obtained to be DeltaL/n, the actual size of the width W of the effective display screen of the flat panel display device in the image is calculated to be DeltaL multiplied by n1/n when the width W of the effective display screen in the image occupies the number n1 of pixels, the actual size of the height H of the effective display screen of the flat panel display device in the image is calculated to be DeltaL multiplied by n2/n when the height H of the effective display screen in the image occupies the number n2 of pixels.
As a further improvement of the present invention, when the machine vision collector is fixed up and down with the light color detector, the machine vision collector is directly under the light color detector, and the step 6 specifically includes:
When the machine vision collector and the bright color detector are fixed up and down, assuming that the distance between the machine vision collector and the bright color detector in the vertical direction is S1, calculating the number n3 of pixels occupied by the actual length DeltaL on the measuring and calibrating tool in the image, obtaining the actual physical size DeltaL/n 3 represented by each pixel in the image of the machine vision collector, calculating the number n4 of pixels in the Y-axis direction and the number n5 of pixels in the Z-axis direction, which are the center point of the image and far from the leftmost corner of the effective display screen of the flat panel display device, controlling the servo mechanism to move DeltaL multiplied by n4/n3 along the negative direction of the Y-axis and move [ DeltaLmultiplied by n5/n3] -S1 along the positive direction of the Z-axis, and enabling the bright color detector to face the upper left corner of the effective display screen of the flat panel display device, thereby completing automatic alignment of the initial position.
As a further improvement of the present invention, when the machine vision collector is fixed up and down with the light color detector, the machine vision collector is directly above the light color detector, and the step 6 specifically includes:
When the machine vision collector and the bright color detector are fixed up and down, assuming that the distance between the machine vision collector and the bright color detector in the vertical direction is S1, calculating the number n3 of pixels occupied by the actual length DeltaL on the measuring and calibrating tool in the image, obtaining the actual physical size DeltaL/n 3 represented by each pixel in the image of the machine vision collector, calculating the number n4 of pixels in the Y-axis direction and the number n5 of pixels in the Z-axis direction, which are the center point of the image and far from the leftmost corner of the effective display screen of the flat panel display device, controlling the servo mechanism to move DeltaL multiplied by n4/n3 along the negative direction of the Y-axis and move [ DeltaLmultiplied by n5/n3] +S1 along the positive direction of the Z-axis, and enabling the bright color detector to face the upper left corner of the effective display screen of the flat panel display device, thereby completing automatic alignment of the initial position.
As a further improvement of the present invention, when the machine vision collector is fixed to the left and right of the bright color detector, the machine vision collector is located at the left side of the bright color detector, and the step 6 specifically includes:
When the machine vision collector and the bright color detector are fixed left and right, assuming that the distance between the machine vision collector and the bright color detector in the horizontal direction is S1, calculating the number n3 of pixels occupied by the actual length DeltaL on a measuring and calibrating tool in an image, obtaining the actual physical size DeltaL/n 3 represented by each pixel in the image of the machine vision collector, calculating the number n4 of pixels in the Y-axis direction and the number n5 of pixels in the Z-axis direction, which are the center point of the image and far from the leftmost corner of the effective display screen of the flat panel display device, and controlling a servo mechanism to move [ DeltaL multiplied by n4/n3] +S1 along the negative direction of the Y-axis and move DeltaL multiplied by n5/n3 along the positive direction of the Z-axis, wherein the bright color detector is opposite to the upper left corner of the effective display screen of the flat panel display device, thereby completing automatic alignment of the initial position.
As a further improvement of the present invention, when the machine vision collector is fixed to the left and right of the light color detector, the machine vision collector is on the right side of the light color detector, and the step 6 specifically includes:
When the machine vision collector and the bright color detector are fixed left and right, assuming that the distance between the machine vision collector and the bright color detector in the horizontal direction is S1, calculating the number n3 of pixels occupied by the actual length DeltaL on the measuring and calibrating tool in the image, obtaining the actual physical size DeltaL/n 3 represented by each pixel in the image of the machine vision collector, calculating the number n4 of pixels in the Y-axis direction and the number n5 of pixels in the Z-axis direction, which are the center point of the image and far from the leftmost corner of the effective display screen of the flat panel display device, controlling the servo mechanism to move [ DeltaL multiplied by n4/n3] -S1 along the negative direction of the Y-axis, and moving DeltaL multiplied by n5/n3 along the positive direction of the Z-axis, wherein the bright color detector is opposite to the left corner of the effective display screen of the flat panel display device, and thus completing automatic alignment of the initial position.
The beneficial effects of the invention are as follows:
According to the invention, automatic accurate measurement of the effective display screen size, accurate determination of the initial position, automatic calculation of the distribution of the point to be detected, accurate guide of the displacement of a servo mechanism and the like of the flat panel display device in the process of detecting the brightness uniformity of the flat panel display device are realized through an industrial vision measurement, calibration and guide algorithm; the functions greatly improve the speed and the precision of the effective display screen size measurement of the flat panel display equipment, quickly and accurately calculate the initial position, the position and the coordinates of the to-be-measured point, and precisely guide the brightness detector on the servo mechanism to align the positions of all the test points, thereby greatly improving the test efficiency and the accuracy of the brightness uniformity result.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a measurement calibration tool according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the positions of a machine vision collector and a brightness detector (the machine vision collector is located right below the brightness detector) according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a distribution of test points according to an embodiment of the present invention.
Reference numerals:
1. The device comprises a flat panel display device 2, a measuring and calibrating tool 3, a machine vision collector 4 and a brightness detector.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples:
as shown in fig. 1, the method for testing the brightness uniformity of the display device comprises the following steps:
Step 1: as shown in fig. 2, the flat panel display device 1 to be measured is moved to the turntable jig, the posture of the flat panel display device 1 on the turntable jig is adjusted so that the effective display screen plane thereof keeps overlapping with the scale plane of the measurement calibration tool 2 in the vertical direction, and the flat panel display device 1 is fixed. The measuring calibration tool 2 is always fixed in the test process, and the scale plane of the measuring calibration tool is always parallel to an intersecting plane formed by the Z axis and the Y axis of the servo mechanism. As shown in fig. 3, a machine vision collector 3 and a brightness detector 4 are fixed on a Z axis of the servo mechanism, the front end plane of the machine vision collector 3 and the front end plane of the brightness detector 4 fixed on the Z axis are always overlapped in the vertical direction, the relative positions of the machine vision collector 3 and the brightness detector 4 are always fixed, and the machine vision collector 3 and the brightness detector 4 can be integrally displaced and changed along with the motion adjustment of the servo mechanism;
Step 2, as shown in fig. 3, the PC host automatically controls the servo mechanism to adjust the vertical distance between the forefront end surface of the lens of the machine vision collector 3 with the Z axis fixed and the effective light-emitting plane of the flat panel display device to be S, wherein the position is the initial position on the X axis of the servo mechanism, a limit block on the servo mechanism can ensure the accuracy of the distance S, and the distance S can be set to be more than or equal to 10mm and less than or equal to 50mm;
step 3, the PC host sends an instruction to automatically control the image generating device to output a full-white image signal meeting the test resolution requirement to the flat panel display device and enable the flat panel display device to normally display a full-white image;
Step 4, as shown in fig. 3, the PC host automatically controls the machine vision collector 3 on the fixed Z-axis of the servo guide rail, moves to the position where the machine vision collector can completely shoot all effective display screens of the flat panel display device and all scale surfaces of the measuring and calibrating tool at the lower left corner, during the moving process, the PC host automatically controls the liquid lens to focus in real time and feed back the position state of the liquid lens, then the PC host automatically controls the machine vision collector 3 to complete image collection once, calculates the number n of pixels occupied by the actual length delta L of the measuring and calibrating tool in the image, obtains the actual physical size represented by each pixel in the image of the machine vision collector 3 as delta L/n, calculates the number n1 of pixels occupied by the width W of the effective display screen of the flat panel display device in the image, calculates the actual size of the width W of the effective display screen as delta l×n1/n, and calculates the number n2 of pixels occupied by the height H of the effective display screen of the flat panel display device in the image.
Step 5, as shown in fig. 3, the PC host automatically controls the geometric center of the front end of the lens of the bright color detector 4 fixed on the Z axis of the servo mechanism to be aligned with the geometric center of the effective display screen of the flat panel display device, and the PC host automatically adjusts the X axis of the servo mechanism to operate to the initial position, and simultaneously transmits the actual height dimension value of 3 times of the screen to the servo mechanism, and guides the servo mechanism to adjust the bright color detector 4 and the machine vision collector 3 on the Z axis to automatically move along the X axis to a standard distance which is 3 times of the actual height dimension of the screen from the flat panel display device, and the liquid lens automatically completes focusing during the movement of the machine vision collector 3;
Step 6, as shown in fig. 3, the pc host automatically controls the machine vision collector 3 to complete image collection once again at a position which is 3 times the standard distance of the actual height dimension of the screen from the flat panel display device to the effective display screen, if the machine vision collector 3 is fixed under the bright color detector 4, and the distance between the machine vision collector 3 and the bright color detector 4 in the vertical direction is S1, by calculating the number n3 of pixels occupied by the actual length Δl on the calibration tool in the image, the actual physical size represented by each pixel in the image of the machine vision collector 3 is Δl/n3, calculating the number n4 of pixels in the Y-axis direction and the number n5 of pixels in the Z-axis direction, and controlling the servo mechanism to move by [ Δl×n4/n 3] in the negative direction of the Y-axis direction, and the bright color detector 4 is right opposite to the upper left corner of the effective screen, thereby completing initial position automatic alignment;
and 7, as shown in fig. 4, automatically calculating the position coordinate of each to-be-measured point or the offset relative to the initial position according to the number of to-be-measured points, the actual width dimension W and the actual height dimension H of the effective display screen and other parameters, finally automatically guiding the servo mechanism to align the brightness detector on the Z axis according to the positions of each to-be-measured point, and controlling the brightness detector by the PC to complete the brightness and chromaticity data acquisition and complete the uniformity test.
And 8, the PC host sends an instruction to automatically control the image generating device to sequentially output red, green and blue monochromatic field image signals meeting the test resolution requirements to the flat panel display device and normally display the signals, and the step 7 is repeated every time a monochromatic field image is output, so that all uniformity tests are sequentially completed.
In this embodiment, the machine vision collector may extend an industrial camera system, an industrial smart camera system; the flat panel display device can be expanded into a display, a television, an all-in-one machine and the like
In this embodiment, the measurement calibration tool may be reduced to an L-shape with only one side graduation.
In the specific implementation, the relative position fixing mode of the machine vision collector and the bright color detector can be left and right fixing or up and down fixing, and the positions of the machine vision collector and the bright color detector can be interchanged.
The foregoing examples merely illustrate specific embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (6)
1. The method for testing the brightness and color uniformity of the flat panel display device is characterized by comprising the following steps of:
Step 1, moving a flat panel display device to be measured to a turntable clamp, adjusting the posture of the flat panel display device on the turntable clamp, enabling the effective display screen plane to be kept coincident with the scale plane of a measuring and calibrating tool in the vertical direction, and fixing the flat panel display device; the measuring calibration tool is always fixed in the testing process, the scale plane of the measuring calibration tool is always parallel to an intersecting plane formed by a Z axis and a Y axis of a servo mechanism, a machine vision collector and a bright color detector are fixed on the Z axis of the servo mechanism, the front end plane of the machine vision collector and the front end plane of the bright color detector fixed on the Z axis are always overlapped in the vertical direction, the relative positions of the machine vision collector and the bright color detector are always fixed, and the machine vision collector and the bright color detector are integrally displaced along with the movement adjustment of the servo mechanism;
Step 2, the PC host automatically controls the servo mechanism to adjust the vertical distance between the forefront end face of the lens of the machine vision collector, which is fixed on the Z axis, and the effective light-emitting plane of the flat panel display device to be S, and the corresponding position is the initial position on the X axis of the servo mechanism, wherein a limiting block on the servo mechanism ensures the accuracy of the distance S;
step 3, the PC host sends an instruction to automatically control the image generating device to output a full-white image signal meeting the test resolution requirement to the flat panel display device, and the flat panel display device normally displays a full-white image;
Step 4, automatically controlling a machine vision collector on a Z-axis fixed servo guide rail by a PC host, moving to the position of all effective display screens of the flat panel display equipment and all scale surfaces of a measuring and calibrating tool at the lower left corner, automatically controlling a liquid lens by the PC host to focus in real time and feed back the position state of the liquid lens in the moving process, automatically controlling the machine vision collector by the PC host to complete one-time image collection, automatically calculating pixels occupied by the actual size of the measuring and calibrating tool in an image through an algorithm, and calculating the actual width size and the actual height size of the effective display screens of the flat panel display equipment in the image by taking the actual size as a measuring reference;
In step 4, the length and width dimensions of the effective display screen of the flat panel display device in the image are calculated as follows:
Calculating the number n of pixels occupied by the actual length DeltaL on the measuring and calibrating tool in the image to obtain the actual physical size DeltaL/n represented by each pixel in the image of the machine vision collector, calculating the actual size of the width W of the effective display screen of the display device in the image to be DeltaL multiplied by n1/n, and calculating the actual size of the height H of the effective display screen of the flat panel display device in the image to be DeltaL multiplied by n2/n;
Step 5, the PC host automatically controls the geometric center of the front end of the lens of the bright color detector fixed on the Z axis of the servo mechanism to be opposite to the geometric center of an effective display picture of the flush panel display device, the PC host automatically adjusts the X axis of the servo mechanism to operate to the initial position of the servo mechanism, meanwhile, the actual height dimension value of the 3 times of screen is transmitted to the servo mechanism, the servo mechanism is guided to adjust the bright color detector and the machine vision collector on the Z axis, the servo mechanism is automatically moved to a standard distance which is 3 times of the actual height dimension of the screen from the panel display device along the X axis, and the liquid lens automatically completes focusing in the moving process of the machine vision collector;
Step 6, automatically controlling a machine vision collector by a PC host to finish image collection once again at a position which is 3 times of the standard distance of the actual height dimension of the screen from the effective display screen of the flat panel display device, measuring pixels occupied by the actual dimension of the calibration tool in a calculated image, taking the calculated pixels as measurement reference to calculate the distance between the image center point in an image picture and the leftmost upper corner of the effective display screen of the flat panel display device, guiding a bright color detector on a Z axis of a servo mechanism to be opposite to the leftmost upper corner of the effective display screen of the flat panel display device, and finishing initial position alignment before testing of the bright color detector;
Step 7, the system automatically calculates the position coordinates of each to-be-measured point or the offset relative to the initial position according to the number of to-be-measured points, the actual width size and the actual height size of the effective display screen, finally automatically guides the servo mechanism to align the brightness detector on the Z axis according to the positions of each to-be-measured point, controls the brightness detector by a PC to complete brightness and chromaticity data acquisition, and completes uniformity test;
and 8, the PC host sends an instruction to automatically control the image generating device to sequentially output red, green and blue monochromatic field image signals meeting the test resolution requirements to the flat panel display device and normally display the signals, and the step 7 is repeated every time a monochromatic field image is output, so that all uniformity tests are sequentially completed.
2. The method of claim 1, wherein in the step2, the distance S is set to be in a range of 10 mm.ltoreq.S.ltoreq.50 mm.
3. The method for testing the uniformity of brightness and color of a flat panel display device according to claim 1, wherein the machine vision collector is located right under the brightness and color detector when the machine vision collector is fixed up and down with the brightness and color detector, said step 6 is specifically as follows:
When the machine vision collector and the bright color detector are fixed up and down, assuming that the distance between the machine vision collector and the bright color detector in the vertical direction is S1, calculating the number n3 of pixels occupied by the actual length DeltaL on the measuring and calibrating tool in the image, obtaining the actual physical size DeltaL/n 3 represented by each pixel in the image of the machine vision collector, calculating the number n4 of pixels in the Y-axis direction and the number n5 of pixels in the Z-axis direction, which are the center point of the image and far from the leftmost corner of the effective display screen of the flat panel display device, controlling the servo mechanism to move DeltaL multiplied by n4/n3 along the negative direction of the Y-axis and move [ DeltaLmultiplied by n5/n3] -S1 along the positive direction of the Z-axis, and enabling the bright color detector to face the upper left corner of the effective display screen of the flat panel display device, thereby completing automatic alignment of the initial position.
4. The method for testing the uniformity of brightness and color of a flat panel display device according to claim 1, wherein the machine vision collector is located right above the brightness and color detector when the machine vision collector is vertically fixed to the brightness and color detector, wherein the step 6 is specifically as follows:
When the machine vision collector and the bright color detector are fixed up and down, assuming that the distance between the machine vision collector and the bright color detector in the vertical direction is S1, calculating the number n3 of pixels occupied by the actual length DeltaL on the measuring and calibrating tool in the image, obtaining the actual physical size DeltaL/n 3 represented by each pixel in the image of the machine vision collector, calculating the number n4 of pixels in the Y-axis direction and the number n5 of pixels in the Z-axis direction, which are the center point of the image and far from the leftmost corner of the effective display screen of the flat panel display device, controlling the servo mechanism to move DeltaL multiplied by n4/n3 along the negative direction of the Y-axis and move [ DeltaLmultiplied by n5/n3] +S1 along the positive direction of the Z-axis, and enabling the bright color detector to face the upper left corner of the effective display screen of the flat panel display device, thereby completing automatic alignment of the initial position.
5. The method for testing the uniformity of brightness and color of a flat panel display device according to claim 1, wherein the machine vision collector is on the left side of the brightness and color detector when the machine vision collector is fixed on the left side of the brightness and color detector, said step 6 is specifically as follows:
When the machine vision collector and the bright color detector are fixed left and right, assuming that the distance between the machine vision collector and the bright color detector in the horizontal direction is S1, calculating the number n3 of pixels occupied by the actual length DeltaL on a measuring and calibrating tool in an image, obtaining the actual physical size DeltaL/n 3 represented by each pixel in the image of the machine vision collector, calculating the number n4 of pixels in the Y-axis direction and the number n5 of pixels in the Z-axis direction, which are the center point of the image and far from the leftmost corner of the effective display screen of the flat panel display device, and controlling a servo mechanism to move [ DeltaL multiplied by n4/n3] +S1 along the negative direction of the Y-axis and move DeltaL multiplied by n5/n3 along the positive direction of the Z-axis, wherein the bright color detector is opposite to the upper left corner of the effective display screen of the flat panel display device, thereby completing automatic alignment of the initial position.
6. The method for testing the uniformity of brightness and color of a flat panel display device according to claim 1, wherein the machine vision collector is on the right side of the brightness and color detector when the machine vision collector is fixed on the left and right sides of the brightness and color detector, wherein the step 6 is specifically as follows:
When the machine vision collector and the bright color detector are fixed left and right, assuming that the distance between the machine vision collector and the bright color detector in the horizontal direction is S1, calculating the number n3 of pixels occupied by the actual length DeltaL on the measuring and calibrating tool in the image, obtaining the actual physical size DeltaL/n 3 represented by each pixel in the image of the machine vision collector, calculating the number n4 of pixels in the Y-axis direction and the number n5 of pixels in the Z-axis direction, which are the center point of the image and far from the leftmost corner of the effective display screen of the flat panel display device, controlling the servo mechanism to move [ DeltaL multiplied by n4/n3] -S1 along the negative direction of the Y-axis, and moving DeltaL multiplied by n5/n3 along the positive direction of the Z-axis, wherein the bright color detector is opposite to the left corner of the effective display screen of the flat panel display device, and thus completing automatic alignment of the initial position.
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