CN108663371B - Method and system for detecting dust and foreign matters on display panel - Google Patents
Method and system for detecting dust and foreign matters on display panel Download PDFInfo
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- CN108663371B CN108663371B CN201810301969.0A CN201810301969A CN108663371B CN 108663371 B CN108663371 B CN 108663371B CN 201810301969 A CN201810301969 A CN 201810301969A CN 108663371 B CN108663371 B CN 108663371B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/94—Investigating contamination, e.g. dust
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8809—Adjustment for highlighting flaws
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N2021/9513—Liquid crystal panels
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Abstract
The invention provides a method for detecting dust and foreign matters on a display panel, which comprises the steps of providing the display panel; acquiring all positions and areas of the display panel where dust and foreign matters appear under white light, red light, green light and blue light pictures respectively; comparing the area of each dust foreign matter in the display panel, which appears under the white light picture, with the area of each dust foreign matter in the display panel, which correspondingly appears under the red light picture, the green light picture and the blue light picture at the same position, and determining that each dust foreign matter in the display panel is correspondingly positioned on the surface or in the display panel according to the comparison result. By implementing the invention, not only can the dust and foreign matters be distinguished on the surface of the display panel or in the display panel, but also the time and the labor can be saved.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a method and a system for detecting dust and foreign matters on a display panel.
Background
An AMOLED (Active-matrix organic light emitting diode) display has become a new development trend of a display panel due to its advantages of energy saving, wide viewing angle, real color, flexibility and bending.
The method comprises the steps that the display panel is subjected to picture inspection in a box forming stage and a module stage in the production process of the flexible AMOLED panel, and the defects of points, lines, color spots (Mura) and the like of the display panel are detected through switching of white, black, gray, red, green and blue pictures, so that the production yield of the display panel in the stages is mastered, and a basis is provided for subsequent repair. However, the surface or the inside of the display panel is inevitably contaminated by dust and foreign matters in the production process, so that the quality of the display panel is reduced. Therefore, it is important to accurately detect specific information of the dust and the foreign matter on the display panel.
Because the same situation of the dust and foreign matter is seen by human eyes under different pictures, the situation that whether the dust and foreign matter is on the surface or inside of the display panel cannot be accurately judged, and therefore a camera with higher resolution capability is needed to finish automatic picture detection.
In the existing image detection process, firstly, the dust and foreign matters on the surface of the display panel are screened out in a fuzzy mode through the detection light detection step, and then the dust and foreign matters detected by the detection light are further accurately positioned through the image detection step. As shown in fig. 1, in the detection light detection step, the CCD camera 1 is mainly used/ LED light source 2/And a display panel mounting table 3/Etc. to realize the display panel 4/Dust and foreign matter 5/And (6) detecting. During detection, the display panel 4/In the dark state, the LED light source 2/The emitted detection light is irradiated to the display panel 4/A surface; at this time, when the detection light irradiates a place without dust and foreign matter, most of the light is directly reflected, so that the CCD camera 1/The shot images are black and dark pictures; when the detection light is irradiated with the dust and foreign matter 5/When present, foreign matter 5 due to dust/Has a diffuse reflection effect on the light so that a part of the light is reflected to the CCD camera 1/Medium parallel CCD camera 1/The display panel 4 is detected by showing a bright spot in the photographed image/On dust and foreign matter 5/And records the corresponding bright point on the display panel 4/Is measured. Then, in the subsequent picture inspection process, if on the display panel 4/If foreign matters appear at the same coordinates, the foreign matters are defined as dust and foreign matters, so that the interference of the dust and the foreign matters is filtered. However, the above method cannot distinguish whether dust foreign matter is on the surface of the display panel or inside the display panel.
Therefore, a method for detecting dust and foreign matter on a display panel is needed, which can not only distinguish whether the dust and foreign matter is on the surface of the display panel or inside the display panel, but also save time and labor.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a method and a system for detecting dust and foreign matter on a display panel, which can not only distinguish whether the dust and foreign matter is on the surface of the display panel or inside the display panel, but also save time and labor.
In order to solve the above technical problem, an embodiment of the present invention provides a method for detecting dust and foreign matter on a display panel, including:
providing a display panel;
acquiring all positions and areas of the display panel where dust and foreign matters appear under white light, red light, green light and blue light pictures respectively;
and comparing the area of each dust foreign matter in the display panel, which appears under the white light picture, with the area of each dust foreign matter in the display panel, which correspondingly appears under the red light picture, the green light picture and the blue light picture at the same position, and determining that each dust foreign matter in the display panel is correspondingly positioned on the surface or in the display panel according to the comparison result.
Wherein, the specific steps of comparing the area of each dust foreign matter in the display panel respectively appearing under the white light picture with the area of each dust foreign matter in the display panel correspondingly appearing under the red light, green light and blue light pictures at the same position, and determining that each dust foreign matter in the display panel is positioned on the surface or inside of the display panel according to the comparison result comprise:
comparing the area of each dust foreign matter in the same position under the white light picture with the area of each dust foreign matter under the red light picture, the green light picture and the blue light picture;
when the area of a certain dust foreign matter appearing under the white light picture is equal to the area of the dust foreign matter appearing under the red light picture, the green light picture and the blue light picture correspondingly, the dust foreign matter with the equal area under the white light picture, the red light picture, the green light picture and the blue light picture is determined to be positioned on the surface of the display panel;
when the area of a certain dust foreign matter appearing under the white light picture at the same position is equal to the sum of the areas correspondingly appearing under the red light picture, the green light picture and the blue light picture, the dust foreign matter with the area appearing under the white light picture equal to the sum of the areas appearing under the red light picture, the green light picture and the blue light picture is determined to be positioned in the display panel.
Wherein, the display panel respectively comprises a gap between any two of R, G and B luminous pixels and a gap between any two of R, G and B luminous pixels, and at any one, two or three of R, G and B luminous pixels.
The white light picture of the display panel is obtained by simultaneously turning on R, G and B three luminous pixels; the red light picture of the display panel is obtained by turning on an R light-emitting pixel and simultaneously turning off a G light-emitting pixel and a B light-emitting pixel; the green light picture of the display panel is obtained by turning on a G light-emitting pixel and simultaneously turning off R and B light-emitting pixels; the blue picture of the display panel is obtained by turning on the B luminous pixel and simultaneously turning off the R and G luminous pixels.
Wherein the display panel is a flexible AMOLED panel.
The embodiment of the invention also provides a system for detecting dust and foreign matters on the display panel, which comprises:
a display panel selection unit for providing a display panel;
the device comprises a dust foreign matter position and area acquisition unit, a data acquisition unit and a data acquisition unit, wherein the dust foreign matter position and area acquisition unit is used for acquiring all positions and areas of dust foreign matters on the display panel under white light, red light, green light and blue light pictures respectively;
and the dust and foreign matter detection, comparison and determination unit is used for comparing the area of each dust and foreign matter in the display panel respectively appearing under the white light picture with the area of each dust and foreign matter in the display panel correspondingly appearing under the red light picture, the green light picture and the blue light picture at the same position, and determining that each dust and foreign matter in the display panel is positioned on the surface or in the display panel according to the comparison result.
Wherein the dust and foreign matter detection comparing and determining unit includes:
the detection and comparison module is used for comparing the area of each dust foreign matter on the same position under the white light picture with the area of each dust foreign matter under the red light picture, the green light picture and the blue light picture;
the first detection result output module is used for determining that the dust foreign matters with the same area under the white light picture are positioned on the surface of the display panel when the area of the dust foreign matters under the white light picture is equal to the area of the dust foreign matters under the red light picture, the green light picture and the blue light picture;
and the second detection result output module is used for determining that the dust foreign matter with the area under the white light picture equal to the sum of the areas under the red light picture, the green light picture and the blue light picture is positioned in the display panel when the area under the white light picture of a certain dust foreign matter at the same position is equal to the sum of the areas under the red light picture, the green light picture and the blue light picture.
Wherein, the display panel respectively comprises a gap between any two of R, G and B luminous pixels and a gap between any two of R, G and B luminous pixels, and at any one, two or three of R, G and B luminous pixels.
The white light picture of the display panel is obtained by simultaneously turning on R, G and B three luminous pixels; the red light picture of the display panel is obtained by turning on an R light-emitting pixel and simultaneously turning off a G light-emitting pixel and a B light-emitting pixel; the green light picture of the display panel is obtained by turning on a G light-emitting pixel and simultaneously turning off R and B light-emitting pixels; the blue picture of the display panel is obtained by turning on the B luminous pixel and simultaneously turning off the R and G luminous pixels.
Wherein the display panel is a flexible AMOLED panel.
The embodiment of the invention has the following beneficial effects:
compared with the traditional method for detecting the dust and the foreign matters on the display panel, the method for detecting the dust and the foreign matters on the display panel omits the detection light detection step in the traditional detection method, directly detects the dust and the foreign matters on the display panel through the subsequent picture detection step, and can simultaneously judge whether the dust and the foreign matters are on the surface of the display panel or in the display panel, thereby optimizing the detection process, reducing the equipment cost, reducing the beat time of the equipment detection process, and saving time and labor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a schematic diagram illustrating the operation of detecting light detecting steps for detecting dust and foreign matter on a display panel according to the prior art;
FIG. 2 is a flowchart illustrating a method for detecting dust and foreign matter on a display panel according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an application of the method for detecting dust and foreign matter on a display panel according to an embodiment of the present invention; 3a is a contrast diagram of dust and foreign matter respectively corresponding to white light, red light, green light and blue light pictures when the dust and foreign matter simultaneously crosses R, G and B three kinds of light-emitting pixels and is positioned on the surface of the display panel; 3B is a contrast diagram of dust and foreign matter simultaneously crossing R, G and B three kinds of light-emitting pixels and located inside the display panel corresponding to white light, red light, green light and blue light respectively;
FIG. 4 is a diagram illustrating another application scenario of the method for detecting dust on a display panel according to an embodiment of the present invention; 4a is a contrast image of dust and foreign matters which are separately positioned on the G luminous pixels and respectively correspond to white light, red light, green light and blue light pictures when positioned on the surface of the display panel; 4b is a contrast image of dust and foreign matters which are separately positioned on the G luminous pixels and positioned in the display panel and respectively correspond to white light, red light, green light and blue light pictures;
FIG. 5 is a diagram illustrating another application scenario of the method for detecting dust on a display panel according to an embodiment of the present invention; 5a is a comparison graph of dust and foreign matters which are positioned in a gap between the R and G light-emitting pixels and respectively correspond to white light, red light, green light and blue light pictures when the dust and the foreign matters are positioned on the surface of the display panel; 5b is a comparison graph of dust and foreign matters in a gap between the R and G light-emitting pixels and in the display panel corresponding to white, red, green and blue images respectively;
fig. 6 is a schematic structural diagram of a system for detecting dust and foreign matter on a display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 2, in an embodiment of the present invention, a method for detecting dust and foreign matter on a display panel is provided, the method including the following steps:
step S1, providing a display panel;
the specific process is to select a display panel for detection, and the display panel includes but is not limited to a flexible AMOLED panel.
Step S2, acquiring all positions and areas of the display panel where dust and foreign matters appear under white light, red light, green light and blue light pictures respectively;
the specific process is that the picture detection is directly carried out on the display panel in a lighting state through the CCD camera, so as to obtain all positions and areas of the display panel where the dust and foreign matters appear under the white light, red light, green light and blue light pictures respectively, namely, the positions and the corresponding areas of all the positions of the display panel where the dust and foreign matters appear under the white light picture are firstly judged, and then the areas of all the dust and foreign matters which appear under the red light, green light and blue light pictures at the same positions (the positions are not changed) are respectively obtained under the red light, green light and blue light pictures.
It should be noted that the white picture of the display panel is obtained by turning on R, G and B three kinds of light-emitting pixels simultaneously; the red light picture of the display panel is obtained by turning on the R luminous pixel and simultaneously turning off the G and B luminous pixels; the green light picture of the display panel is obtained by turning on a G light-emitting pixel and simultaneously turning off R and B light-emitting pixels; the blue picture of the display panel is obtained by turning on the B light-emitting pixel and simultaneously turning off the R and G light-emitting pixels.
It is to be understood that the position where the dust foreign matter appears in the display panel may be located in the gap between R, G and any two of the three types of B luminous pixels, may be located individually in any one of the three types of R, G and B luminous pixels, may be located in any two of the three types of R, G and B luminous pixels, or may be located across both the three types of R, G and B luminous pixels.
Step S3, comparing the area of each dust foreign object in the display panel appearing under the white light picture with the area of each dust foreign object in the display panel appearing under the red, green and blue light pictures at the same position, and determining that each dust foreign object in the display panel is correspondingly located on the surface or inside of the display panel according to the comparison result.
The specific process is that the area of each dust foreign matter on the same position under the white light picture is compared with the area under the red light picture, the green light picture and the blue light picture;
when the area of a certain dust foreign matter appearing under the white light picture is equal to the area of the dust foreign matter appearing under the red light picture, the green light picture and the blue light picture correspondingly, the dust foreign matter with the equal area under the white light picture, the red light picture, the green light picture and the blue light picture is determined to be positioned on the surface of the display panel;
when the area of a certain dust foreign matter appearing under the white light picture at the same position is equal to the sum of the areas correspondingly appearing under the red light picture, the green light picture and the blue light picture, the dust foreign matter with the area appearing under the white light picture equal to the sum of the areas appearing under the red light picture, the green light picture and the blue light picture is determined to be positioned in the display panel.
It should be noted that when a certain dust foreign substance appears inside the display panel and is located in the gap between any two of the R, G and B three kinds of light-emitting pixels, the dust foreign substance does not affect the light emission of the R, G and B three kinds of light-emitting pixels, so that the areas of the dust foreign substance appearing on the white, red, green and blue light pictures are all 0, and the rule that the area of the dust foreign substance appearing on the white light picture is equal to the sum of the areas of the dust foreign substance appearing on the red, green and blue light pictures. Of course, if a dust foreign object appears on the surface of the display panel and is located in a gap between any two of the R, G and B three kinds of light-emitting pixels, the dust foreign object can partially shield the light-emitting pixels, so that the light of the light-emitting pixels can also render the dust foreign object on the surface, the shape and the contour of the dust foreign object are displayed, and the rule that the areas of the dust foreign object appearing under the white light, the red light, the green light and the blue light pictures are equal is met.
In one embodiment, the area of a certain dust and foreign matter a appearing under the white light screen is S10, and the area under the red light screen turned on at the same position is S11, the area under the green light screen turned on is S12, and the area under the blue light screen turned on is S13; when the white light area S10 is red light area S11 is green light area S12 is blue light area S13, the dust and foreign matter a is located on the surface of the display panel;
the area of a certain dust and foreign matter B appearing under the white light picture is S20, and the area under the red light picture on at the same position is S21, the area under the green light picture on is S22 and the area under the blue light picture on is S23; when the white light area S20 is red light area S21 is green light area S22 is blue light area S23, the dust and foreign matter B is located inside the display panel;
by analogy, it can be determined whether all dust foreign substances on the display panel are present on the surface or inside the display panel.
As shown in fig. 3 to 5, an application scenario of the method for detecting dust and foreign matter on a display panel according to the embodiment of the present invention is further described; wherein white is represented as a white picture, red is represented as a red picture, green is represented as a green picture, blue is represented as a blue picture:
in fig. 3, dust and foreign matter simultaneously crosses R, G and B three kinds of pixels, and if the dust and foreign matter is on the surface of the pixel, the shape and contour of the dust and foreign matter will be fully displayed due to the rendering of the surface dust and foreign matter by the light of the pixel in white, red, green and blue images (as shown in fig. 3 a). And when the result is processed, comparing the shot white light picture image with the images of the red light picture, the green light picture and the blue light picture, and if the area of the dust foreign matters appearing in the white light picture is the same as the areas of the dust foreign matters appearing in the red light picture, the green light picture and the blue light picture, judging that the dust foreign matters are surface dust foreign matters, wherein the dust foreign matters are positioned on the surface of the display panel.
If the dust and foreign matter is inside the light-emitting pixel, the light of the light-emitting pixel cannot render the dust and foreign matter inside the light-emitting pixel, so that only the part of the light-emitting pixel polluted by the dust and foreign matter is in a dark state (as shown in fig. 3 b). Similarly, when the result is processed, the photographed white light picture image is compared with the images of the red light picture, the green light picture and the blue light picture, and if the area of the dust foreign matters appearing in the white light picture is equal to the sum of the areas of the dust foreign matters of the red light picture, the green light picture and the blue light picture, the dust foreign matters are judged to be the internal dust foreign matters and are positioned in the display panel.
In fig. 4, when the dust foreign substance only acts on a single pixel (e.g. G light-emitting pixel), if the dust foreign substance is on the surface of the light-emitting pixel, the shape and contour of the dust foreign substance are shown due to the rendering effect of the light-emitting pixel on the dust foreign substance on the surface (as shown in fig. 4 a). When the result is processed, the shot white light picture image is compared with the images of the red light picture, the green light picture and the blue light picture, if the area of the dust foreign matters appearing in the white light picture is the same as the area of the dust foreign matters appearing in the red light picture, the green light picture and the blue light picture, the surface dust foreign matters can be judged, and the dust foreign matters are positioned on the surface of the display panel;
if the dust is inside the light-emitting pixel, the light-emitting pixel cannot render the dust inside the light-emitting pixel, and only the portion of the light-emitting pixel contaminated by the dust will appear as a dark state or a color lack (as shown in fig. 4 b). And when the result is processed, comparing the shot white light picture image with the images of the red light picture, the green light picture and the blue light picture, and if the area of the dust foreign matters appearing in the white light picture is equal to the sum of the areas of the red light picture, the green light picture and the blue light picture, judging that the dust foreign matters are in the display panel.
In fig. 5, when a dust contaminant is present in a gap between two types of pixels (e.g., a gap between R and G pixels), if the dust contaminant is present on the surface of a pixel, the light from the pixel will also render the surface dust contaminant, showing the shape and contour of the dust contaminant (as shown in fig. 5 a). When the result is processed, the shot white light picture image is compared with the images of the red light picture, the green light picture and the blue light picture, if the area of the dust foreign matters appearing in the white light picture is the same as the area of the dust foreign matters appearing in the red light picture, the green light picture and the blue light picture, the surface dust foreign matters can be judged, and the dust foreign matters are positioned on the surface of the display panel;
if the dust foreign matter is inside the light-emitting pixel, the dust foreign matter at this time does not affect the normal light emission of each pixel (as shown in fig. 5 ab), that is, when the result is processed, the images of the shot white light picture and the red light, green light and blue light pictures are compared, the area of the dust foreign matter appearing in the white light picture is 0, and the area of the dust foreign matter appearing in the red light, green light and blue light pictures is also 0, so that if the area of the dust foreign matter appearing in the white light picture is equal to the sum of the areas of the dust foreign matters appearing in the red light, green light and blue light pictures, the dust foreign matter can be determined as the internal dust foreign matter, and the dust foreign.
Generally speaking, for the positions where common dust and foreign matters appear, the logic algorithm can be used for quickly detecting the dust and foreign matters inside and outside, namely, the areas of the dust and foreign matters appearing on a white light picture are the same as the areas of the dust and foreign matters on red, green and blue light pictures, and then the dust and foreign matters on the surface can be determined; if the area of the dust foreign matters appearing on the white picture is equal to the sum of the areas of the dust foreign matters on the red, green and blue pictures, the internal dust foreign matters can be judged.
As shown in fig. 6, in an embodiment of the present invention, a system for detecting dust and foreign matter on a display panel is provided, the system including:
a display panel selection unit 110 for providing a display panel;
a dust and foreign matter position and area obtaining unit 120, configured to obtain all positions and areas of the display panel where dust and foreign matter appear in white light, red light, green light, and blue light frames, respectively;
the dust and foreign matter detection, comparison and determination unit 130 is configured to compare an area of each dust and foreign matter in the display panel, which appears under the white light picture, with an area of each dust and foreign matter in the display panel, which correspondingly appears under the red light, the green light, and the blue light pictures at the same position, and determine that each dust and foreign matter in the display panel is located on the surface or inside of the display panel according to a comparison result.
Wherein the dust and foreign matter detection comparing and determining unit 130 includes:
the detection and comparison module 1301 is used for comparing the area of each dust foreign matter in the same position under the white light picture with the area of each dust foreign matter under the red light picture, the green light picture and the blue light picture;
a first detection result output module 1302, configured to determine that dust and foreign matter with equal areas appearing in the white light picture and the red light picture, the green light picture and the blue light picture are located on the surface of the display panel when the area of a dust and foreign matter appearing in the white light picture is equal to the area of the dust and foreign matter appearing in the red light picture, the green light picture and the blue light picture;
and the second detection result output module 1303 is configured to determine that a dust foreign object whose area under the white light picture is equal to the sum of the areas under the red light, green light, and blue light pictures when the area under the white light picture of a certain dust foreign object at the same position is equal to the sum of the areas under the red light, green light, and blue light pictures.
The positions of the display panel where dust and foreign matters appear under white, red, green and blue pictures respectively comprise a gap between any two of R, G and B light-emitting pixels and a gap between any one, two or three of R, G and B light-emitting pixels.
Wherein, the white light picture of the display panel is obtained by simultaneously turning on R, G and B three luminous pixels; the red light picture of the display panel is obtained by turning on the R luminous pixel and simultaneously turning off the G and B luminous pixels; the green light picture of the display panel is obtained by turning on a G light-emitting pixel and simultaneously turning off R and B light-emitting pixels; the blue picture of the display panel is obtained by turning on the B light-emitting pixel and simultaneously turning off the R and G light-emitting pixels.
The display panel is a flexible AMOLED panel.
The embodiment of the invention has the following beneficial effects:
compared with the traditional method for detecting the dust and the foreign matters on the display panel, the method for detecting the dust and the foreign matters on the display panel omits the detection light detection step in the traditional detection method, directly detects the dust and the foreign matters on the display panel through the subsequent picture detection step, and can simultaneously judge whether the dust and the foreign matters are on the surface of the display panel or in the display panel, thereby optimizing the detection process, reducing the equipment cost, reducing the beat time of the equipment detection process, and saving time and labor.
It should be noted that, in the foregoing system embodiment, each included system unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A method of detecting dust and foreign matter on a display panel, the method comprising:
providing a display panel;
acquiring all positions and areas of the display panel where dust and foreign matters appear under white light, red light, green light and blue light pictures respectively;
and comparing the area of each dust foreign matter in the display panel, which appears under the white light picture, with the area of each dust foreign matter in the display panel, which correspondingly appears under the red light picture, the green light picture and the blue light picture at the same position, and determining that each dust foreign matter in the display panel is correspondingly positioned on the surface or in the display panel according to the comparison result.
2. The method as claimed in claim 1, wherein the step of comparing the area of each dust foreign object in the display panel under the white light frame with the area of each dust foreign object under the red, green and blue light frames corresponding to the same position of each dust foreign object in the display panel, and determining whether each dust foreign object in the display panel is located on the surface or inside of the display panel according to the comparison result comprises:
comparing the area of each dust foreign matter in the same position under the white light picture with the area of each dust foreign matter under the red light picture, the green light picture and the blue light picture;
when the area of a certain dust foreign matter appearing under the white light picture is equal to the area of the dust foreign matter appearing under the red light picture, the green light picture and the blue light picture correspondingly, the dust foreign matter with the equal area under the white light picture, the red light picture, the green light picture and the blue light picture is determined to be positioned on the surface of the display panel;
when the area of a certain dust foreign matter appearing under the white light picture at the same position is equal to the sum of the areas correspondingly appearing under the red light picture, the green light picture and the blue light picture, the dust foreign matter with the area appearing under the white light picture equal to the sum of the areas appearing under the red light picture, the green light picture and the blue light picture is determined to be positioned in the display panel.
3. The method of claim 1, wherein all the positions of the display panel where the dust foreign matter appears in the white, red, green and blue frames include a gap between R, G and any two of the three kinds of B luminous pixels and a gap between R, G and any one, two or three kinds of B luminous pixels.
4. The method of claim 1, wherein the white picture of the display panel is obtained by turning on R, G and B three kinds of luminous pixels simultaneously; the red light picture of the display panel is obtained by turning on an R light-emitting pixel and simultaneously turning off a G light-emitting pixel and a B light-emitting pixel; the green light picture of the display panel is obtained by turning on a G light-emitting pixel and simultaneously turning off R and B light-emitting pixels; the blue picture of the display panel is obtained by turning on the B luminous pixel and simultaneously turning off the R and G luminous pixels.
5. The method of claim 1, wherein the display panel is a flexible AMOLED panel.
6. A system for detecting dust and foreign matter on a display panel, the system comprising:
a display panel selection unit for providing a display panel;
the device comprises a dust foreign matter position and area acquisition unit, a data acquisition unit and a data acquisition unit, wherein the dust foreign matter position and area acquisition unit is used for acquiring all positions and areas of dust foreign matters on the display panel under white light, red light, green light and blue light pictures respectively;
and the dust and foreign matter detection, comparison and determination unit is used for comparing the area of each dust and foreign matter in the display panel respectively appearing under the white light picture with the area of each dust and foreign matter in the display panel correspondingly appearing under the red light picture, the green light picture and the blue light picture at the same position, and determining that each dust and foreign matter in the display panel is positioned on the surface or in the display panel according to the comparison result.
7. The system of claim 6, wherein the dust and foreign matter detection comparing and determining unit includes:
the detection and comparison module is used for comparing the area of each dust foreign matter on the same position under the white light picture with the area of each dust foreign matter under the red light picture, the green light picture and the blue light picture;
the first detection result output module is used for determining that the dust foreign matters with the same area under the white light picture are positioned on the surface of the display panel when the area of the dust foreign matters under the white light picture is equal to the area of the dust foreign matters under the red light picture, the green light picture and the blue light picture;
and the second detection result output module is used for determining that the dust foreign matter with the area under the white light picture equal to the sum of the areas under the red light picture, the green light picture and the blue light picture is positioned in the display panel when the area under the white light picture of a certain dust foreign matter at the same position is equal to the sum of the areas under the red light picture, the green light picture and the blue light picture.
8. The system of claim 6, wherein all the positions of the display panel where the dust foreign matter appears in the white, red, green and blue pictures comprise a gap between R, G and any two of the three kinds of light-emitting pixels B and a gap between R, G and any one, two or three kinds of light-emitting pixels B.
9. The system of claim 6, wherein the white picture of the display panel is obtained by turning on R, G and B three kinds of light-emitting pixels simultaneously; the red light picture of the display panel is obtained by turning on an R light-emitting pixel and simultaneously turning off a G light-emitting pixel and a B light-emitting pixel; the green light picture of the display panel is obtained by turning on a G light-emitting pixel and simultaneously turning off R and B light-emitting pixels; the blue picture of the display panel is obtained by turning on the B luminous pixel and simultaneously turning off the R and G luminous pixels.
10. The system of claim 6, wherein the display panel is a flexible AMOLED panel.
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