CN110047421B - Display panel classification method - Google Patents
Display panel classification method Download PDFInfo
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- CN110047421B CN110047421B CN201910451287.2A CN201910451287A CN110047421B CN 110047421 B CN110047421 B CN 110047421B CN 201910451287 A CN201910451287 A CN 201910451287A CN 110047421 B CN110047421 B CN 110047421B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2003—Display of colours
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
Abstract
The embodiment of the invention discloses a classification method of display panels. The method comprises the steps of obtaining the display chromaticity of a first preset visual angle and the display chromaticity of a second preset visual angle of a display panel; calculating a color cast difference vector of the display chromaticity of the first preset visual angle relative to the display chromaticity of a second preset visual angle; and classifying the display panel according to the color cast difference vector. According to the embodiment of the invention, the color cast of the display panel can be more accurately judged, so that the display panel can be more accurately classified, the factory-delivered display panel can better meet the requirements of users, and the user experience is improved.
Description
Technical Field
The embodiment of the invention relates to a display technology, in particular to a classification method of a display panel.
Background
With the development of display technology, people have higher and higher requirements on the image display quality of display panels, and the problem that the existing display panels have display deviation at different viewing angles is a problem to be solved urgently in the display field.
Disclosure of Invention
The invention provides a name for realizing more accurate judgment of color cast of a display panel, so that the display panel is more accurately classified, the factory-delivered display panel can better meet the requirements of users, and the user experience is improved.
The embodiment of the invention provides a classification method of display panels, which comprises the following steps:
acquiring display chromaticity of a first preset visual angle and display chromaticity of a second preset visual angle of a display panel;
calculating a color cast difference vector of the display chromaticity of the first preset visual angle relative to the display chromaticity of the second preset visual angle;
and classifying the display panel according to the color cast difference vector.
Optionally, classifying the display panel according to the color cast difference vector includes:
calculating the size and the direction of a color cast vector of the color cast difference vector;
and initially classifying the display panel according to the size of the color cast vector, and classifying the display panel according to the direction of the color cast vector.
Optionally, the initially classifying the display panel according to the size of the color cast vector and classifying the display panel according to the direction of the color cast vector includes:
and when the size of the color cast vector is larger than a first set threshold and smaller than a second set threshold, classifying the display panels according to the direction of the color cast vector.
Classifying the display panel according to the color cast difference vector, including:
calculating the size and the direction of a color cast vector of the color cast difference vector;
and initially classifying the display panel according to the color cast vector direction, and classifying the display panel according to the size of the color cast vector.
Optionally, the method further includes:
acquiring the display brightness of a first preset visual angle and the display brightness of a second preset visual angle of a display panel;
calculating the brightness difference between the display brightness of the first preset visual angle and the display brightness of the second preset visual angle;
and classifying the display panel according to the brightness difference and the color cast difference vector.
Optionally, classifying the display panel according to the brightness difference and the color shift difference vector includes:
calculating the size and direction of the color cast vector of the color cast difference vector;
and when the size of the color cast vector is larger than a first set threshold and smaller than a second set threshold, classifying the display panel according to the direction of the color cast vector and the brightness difference.
Optionally, before the obtaining of the display chromaticity of the first preset viewing angle and the display chromaticity of the second preset viewing angle of the display panel, the method further includes:
and driving the display panel to display a white picture.
Optionally, the second preset viewing angle is a zero viewing angle, and the zero viewing angle is a viewing angle at which the sight is perpendicular to the light emitting surface of the display panel.
Optionally, the first preset viewing angle includes at least two different viewing angles.
Optionally, the classification of the display panel is determined according to a maximum value of a color shift vector size and/or a color shift vector direction in at least two color shift difference vectors corresponding to at least two different viewing angles.
According to the embodiment of the invention, the color cast difference vector of the display chromaticity of the first preset visual angle relative to the display chromaticity of the second preset visual angle is calculated, and the display panel is classified according to the color cast difference vector.
Drawings
Fig. 1 is a flowchart of a method for classifying display panels according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
Just as the problem of display deviation of a display panel in different viewing angles mentioned in the background art, the inventor finds, through research, that in the prior art, the management and control of the display deviation problem are generally realized by classifying the display panel through sample limitation and manual observation, and subjective visual differences exist when classification is performed through manual observation, so that the difference of the viewing angle chromaticity of the display panel after leaving a factory is still not improved.
Based on the foregoing problem, the present embodiment provides a method for classifying a display panel, and fig. 1 is a flowchart of the method for classifying a display panel according to the present embodiment, and referring to fig. 1, the method includes:
step 110, obtaining a display chromaticity of a first preset viewing angle and a display chromaticity of a second preset viewing angle of the display panel.
And 120, calculating a color cast difference vector of the display chromaticity of the first preset view angle relative to the display chromaticity of the second preset view angle.
And step 130, classifying the display panel according to the color cast difference vector.
The first preset visual angle and the second preset visual angle are different visual angles, and the display chromaticity of the first preset visual angle and the display chromaticity of the second preset visual angle can be respectively acquired by adopting visual angle optical measurement equipment. The display chromaticity is generally expressed by color coordinates, and thus the color shift difference vector is calculated by the color coordinates when calculating the color shift difference vector of the display chromaticity of the first preset viewing angle and the display chromaticity of the second preset viewing angle.
In addition, the display panels are classified according to the color shift difference vector, that is, according to the size and direction of the color shift vector of the color shift difference vector. The color cast vector is the vector size of the color cast difference vector, and the color cast vector direction is the vector direction of the color cast difference vector. The size of the color shift vector reflects the absolute value of the color shift, and the direction of the color shift vector reflects the type of the color shift, for example, when a white picture is displayed, the types of the color shifts corresponding to different directions of the color shift vector are different, for example, the color shifts corresponding to different directions of the color shift may be yellow, red, or blue, etc.
The scheme of this embodiment is through calculating the colour cast difference vector of the display colourity of first preset visual angle and the display colourity of second preset visual angle, and classify display panel according to colour cast difference vector, because colour cast difference vector can not only embody the absolute value size of colour cast, can also embody the direction of colour cast, the scheme of this embodiment judges display panel's colour cast more accurately, thereby it is more accurate to the classification of display panel, make the display panel who dispatches from the factory more can satisfy user's requirement, promote user experience, and the compensation precision of the follow-up compensation of showing the difference to display panel has been improved.
It should be noted that the second preset viewing angle may be a viewing angle most frequently viewed by the user. Illustratively, the most frequently watched visual angle of the user is a zero visual angle, the second preset visual angle may be set to be the zero visual angle, the first preset visual angle is a visual angle other than the zero visual angle, and when the most frequently watched visual angle of the user is a 15-degree visual angle, the second preset visual angle may be set to be the 15-degree visual angle, and the first preset visual angle is a visual angle other than the 15-degree visual angle. In addition, the first preset visual angle and the second preset visual angle can be any different visual angles, so that the color cast of any two visual angles of the display panel can be judged.
Optionally, classifying the display panel according to the color cast difference vector includes:
calculating the size and direction of the color cast vector of the color cast difference vector;
and initially classifying the display panel according to the size of the color cast vector, and classifying the display panel according to the direction of the color cast vector.
Specifically, the display panels with smaller color shift vectors may be classified into one category, and the display panels with larger color shift vectors may be classified into another category, where the color shift vectors in the middle are classified according to the color shift vector direction. The display panel can also be classified into a plurality of classes according to the size of the color cast vector, and each class is classified according to the direction of the color cast vector. Illustratively, the color shift vector direction can be classified into 0-30 degrees, 30-60 degrees, and so on.
According to the embodiment, the display panel is initially classified according to the size of the color cast vector, and then the display panel is classified according to the direction of the color cast vector, so that the color cast of the display panel is judged more accurately, the classification of the display panel is more accurate, the factory-leaving display panel can meet the requirements of users, and the user experience is improved. In addition, the display panels are initially classified according to the size of the color cast vector, the display panels with larger color cast vector size can be firstly separated, and then the panels with the color cast vector size meeting the requirements are subdivided, so that the workload of classification is reduced, and the classification speed is improved.
Optionally, classifying the display panel according to the color cast vector magnitude and the color cast vector direction includes:
and when the size of the color cast vector is larger than a first set threshold and smaller than a second set threshold, classifying the display panel according to the direction of the color cast vector.
Specifically, when the size of the color cast vector is smaller, the human eyes cannot recognize the color cast, the display panels of the type do not need to be subdivided, and when the size of the color cast vector is larger than a first set threshold, the display panels of the type can be classified into one type. When the size of the color cast vector is larger, the color cast is too obvious, the quality of the display panel is poorer, the user requirements are not met, and the display panel does not need to be subdivided, so that the display panel can be classified into one class when the size of the color cast vector is larger than a second set threshold value. When the size of the color cast vector is larger than a first set threshold and smaller than a second set threshold, the display panel is classified according to the color cast vector direction, so that the color cast of the display panel can be judged more accurately, the classification of the display panel is more accurate, the classification workload is reduced, and the classification efficiency is improved.
It should be noted that the first set threshold and the second set threshold may be determined according to the nature of the display panel and the user requirement.
Optionally, after classifying the display panel according to the color cast vector direction, the method further includes:
and classifying each type of display panel according to the size of the color cast vector. By the arrangement, more careful and accurate classification can be performed on the color cast of the display panel, different user requirements can be met, and user experience is improved.
For example, when the size of the color shift vector is greater than a first set threshold and less than a second set threshold, the display panels are classified into n categories according to the color shift vector direction, and when a user has a high requirement on the size of the color shift vector of the display panel, each category of display panel may be subdivided according to the size of the color shift vector, so that the display panels of each color shift type may be further classified according to the severity of the color shift (the larger the size of the color shift vector, the more severe the color shift).
Optionally, classifying the display panel according to the color cast difference vector includes:
calculating the size and the direction of a color cast vector of the color cast difference vector;
and initially classifying the display panel according to the color cast vector direction, and classifying the display panel according to the size of the color cast vector.
The display panels are initially classified according to the color cast vector direction, namely, the display panels are initially classified according to the color cast types of the display panels, and then the display panels are classified according to the size of the color cast vectors, namely, the display panels of all the color cast types are subdivided according to the size of the color cast vectors.
Specifically, some users may not need display panels of some color cast types, the display panels are initially classified according to a proper color cast direction, the display panels with the color cast types not meeting the user requirements can be removed firstly, and then the display panels with the color cast types meeting the user requirements are subdivided according to the size of a color cast vector, so that the color cast judgment of the display panels is more accurate, the classification workload is reduced and the classification efficiency is improved.
Optionally, the method further includes:
acquiring the display brightness of a first preset visual angle and the display brightness of a second preset visual angle of a display panel;
calculating the brightness difference between the display brightness of the first preset visual angle and the display brightness of the second preset visual angle;
and classifying the display panel according to the brightness difference and the color cast difference vector.
Specifically, because the too big image display quality at different visual angles that also can influence of the luminance difference at different visual angles of demonstration, classify display panel through luminance difference and the colour cast difference vector according to first predetermined visual angle and second predetermined visual angle for the display difference to the different visual angles of display panel judges more accurately, it is more accurate to classify, make the display panel who dispatches from the factory according to different user's requirements more can satisfy user's demand, more be favorable to promoting user experience, and provide the basis for the follow-up compensation of showing the difference to display panel.
Optionally, classifying the display panel according to the brightness difference and the color shift difference vector includes:
calculating the vector magnitude and the vector direction of the color cast difference vector;
and when the size of the color cast vector is larger than a first set threshold and smaller than a second set threshold, classifying the display panel according to the color cast vector direction and the brightness difference.
Specifically, the display panels may be classified according to the direction of the color shift vector, and each of the classes may be subdivided according to the brightness difference. Or the display panels can be classified according to the brightness difference and then according to the direction of the color cast vector.
For example, the display panels with the brightness difference larger than the third set threshold may be classified into one type, and since the display panels with the larger brightness difference do not meet the user requirements, the display panels of this type may not be subdivided, and only the display panels with the brightness difference smaller than the third set threshold are subdivided according to the color cast vector direction, so that the classification workload may be reduced, and the user experience may be improved.
It should be noted that the size of the third set threshold may be set according to the nature of the display panel and the user requirement, and for example, the third set threshold may be less than or equal to 10% of the display brightness of the second set viewing angle.
Optionally, before the obtaining of the display chromaticity of the first preset viewing angle and the display chromaticity of the second preset viewing angle of the display panel, the method further includes:
and driving the display panel to display a white picture.
Specifically, the sub-pixel units of the three colors of red, green and blue all display the maximum gray scale when the white picture is displayed, that is, the sub-pixel units of the three colors of red, green and blue all display the maximum chromaticity, so that the color cast level of the red, green and blue light emitted by the sub-pixel units of the three colors of red, green and blue can be reflected better, and the color cast levels of the red, green and blue light emitted by the sub-pixel units of the three colors of red, green and blue can be comprehensively evaluated by detecting the white picture.
Optionally, the second preset viewing angle is a zero viewing angle, and the zero viewing angle is a viewing angle at which the sight line is perpendicular to the light exit surface of the display panel.
Specifically, because general display panel does not have color cast at zero viewing angle, and shows luminance the biggest, just can appear showing the difference when other viewing angles, be zero viewing angle through setting up the second settlement time, can be better judge the demonstration difference of the different viewing angles of display panel.
Optionally, the first preset viewing angle includes at least two different viewing angles.
Specifically, because the different first preset visual angles are different relative to the display difference of the second preset visual angle, the display panel can be more comprehensively judged according to the visual angle color cast and the visual angle brightness difference of the display panel by setting the first preset visual angle to include at least two different visual angles, so that the display panel is more accurately classified, and the outgoing display panel can meet the user requirements.
It should be noted that the first preset viewing angle may be determined according to display characteristics of the display panel, a viewing angle with a large distribution range of the color shift vector may be selected as the first preset viewing angle, and for example, 30 degrees, 45 degrees, or 60 degrees may be selected, which is not specifically limited in this embodiment.
Optionally, the classification of the display panel is determined according to a maximum value of a color shift vector size and/or a color shift vector direction in at least two color shift difference vectors corresponding to at least two different viewing angles.
Specifically, when the maximum value of the sizes of the color cast vectors of the at least two color cast difference vectors is larger than a second set threshold, or when the sizes of the color cast vectors of the at least two color cast difference vectors are both smaller than a first set threshold, the classification of the display panels is determined according to the maximum value of the sizes of the color cast vectors. And when the maximum value of the sizes of the color cast vectors of the at least two color cast difference vectors is larger than a first set threshold and smaller than a second set threshold, determining the classification of the display panel according to the direction of the color cast vectors or determining the classification of the display panel according to the direction of the color cast vectors and the maximum value of the sizes of the color cast vectors.
For example, when the maximum value of the magnitudes of the color shift vectors of the at least two color shift difference vectors is greater than a first set threshold and less than a second set threshold, if the directions of the color shift vectors of the at least two color shift difference vectors are different greatly, the display panel may be a defective product, and the display panel is classified as a category. Illustratively, if the first preset viewing angle is set to include 30 degrees and 45 degrees, the color shift vector direction is 50 degrees when the first preset viewing angle is 30 degrees, and the color shift vector direction is-45 degrees when the first preset viewing angle is 45 degrees, the color shift vector direction is reversed, and the display panel has a large problem and can be classified into one category. If the color cast vector directions of at least two color cast difference vectors have small difference, the classification of the display panels is determined according to the maximum angle value of the color cast vector directions or the classification of the display panels is determined jointly according to the maximum angle value of the color cast vector directions and the maximum value of the color cast vector sizes.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A method for classifying display panels, comprising:
acquiring display chromaticity of a first preset visual angle and display chromaticity of a second preset visual angle of a display panel;
calculating a color cast difference vector of the display chromaticity of the first preset visual angle relative to the display chromaticity of the second preset visual angle;
classifying the display panel according to the color cast difference vector;
classifying the display panel according to the color cast difference vector, including:
calculating the size and the direction of a color cast vector of the color cast difference vector;
initially classifying the display panel according to the size of the color cast vector, and classifying the display panel according to the direction of the color cast vector; or initially classifying the display panel according to the color cast vector direction and classifying the display panel according to the size of the color cast vector.
2. The method of claim 1, wherein initially classifying the display panels according to the color shift vector magnitude and classifying the display panels according to the color shift vector direction comprises:
and when the size of the color cast vector is larger than a first set threshold and smaller than a second set threshold, classifying the display panels according to the direction of the color cast vector.
3. The method of claim 1, further comprising:
acquiring the display brightness of a first preset visual angle and the display brightness of a second preset visual angle of a display panel;
calculating the brightness difference between the display brightness of the first preset visual angle and the display brightness of the second preset visual angle;
and classifying the display panel according to the brightness difference and the color cast difference vector.
4. The method of claim 3, wherein classifying the display panels according to the luminance difference and the color shift difference vector comprises:
calculating the size and the direction of a color cast vector of the color cast difference vector;
and when the size of the color cast vector is larger than a first set threshold and smaller than a second set threshold, classifying the display panels according to the color cast vector direction and the brightness difference.
5. The method of claim 1, wherein before obtaining the display chromaticity of the display panel at the first preset viewing angle and the display chromaticity at the second preset viewing angle, further comprising:
and driving the display panel to display a white picture.
6. The method according to any one of claims 1 to 5, wherein:
the second preset visual angle is a zero visual angle, and the zero visual angle is a visual angle with a sight line perpendicular to the light-emitting surface of the display panel.
7. The method according to any one of claims 1 to 5, wherein:
the first preset viewing angle includes at least two different viewing angles.
8. The method of claim 7, wherein:
and determining the classification of the display panel according to the maximum value of the size of the color cast vector and/or the direction of the color cast vector in at least two color cast difference vectors corresponding to at least two different visual angles.
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