CN113539162A - Image capturing method and device of display panel - Google Patents
Image capturing method and device of display panel Download PDFInfo
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- CN113539162A CN113539162A CN202110752198.9A CN202110752198A CN113539162A CN 113539162 A CN113539162 A CN 113539162A CN 202110752198 A CN202110752198 A CN 202110752198A CN 113539162 A CN113539162 A CN 113539162A
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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
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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
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract
The embodiment of the application discloses a method and a device for correcting an image capturing angle, which are used for improving the image capturing precision. The method in the embodiment of the application comprises the following steps: lighting the display panel; capturing images of the lightened display panel through an image capturing camera to generate a display panel image; searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image; calculating a longitudinal parameter according to the at least two vertex coordinates; judging whether the longitudinal parameter is larger than a preset threshold value or not; if not, calculating a deviation correction angle according to the coordinates of the at least two vertexes; and adjusting the image capturing angle of the image capturing camera according to the deviation correction angle.
Description
Technical Field
The embodiment of the application relates to the field of display panels, in particular to an image capturing method and an image capturing device of a display panel.
Background
With the continuous progress of science and technology, the technology of display panels is continuously developed, and the application range of display panels is continuously expanded, and the display panels are particularly widely applied to display screens of electronic products such as mobile phone screens, computer screens and the like. In order to ensure the use condition of the mobile phone screen and the computer screen, the performance test of the display panel needs to be performed after the display panel is manufactured.
When the display panel is placed on the display panel carrying platform for image capture, the ideal state is that the center point of the display panel is coincident with the center of the visual field of the image capture camera, and the angle deviation does not exist relative to the image capture camera. However, in practical situations, since the display panel may have a deviation when the image is placed, the edge of the display panel and the edge of the image capturing camera have a certain angle. Such angular deviations require geometric correction of the display panel image. When the angular deviation is large, the angular deviation of the display panel image can be corrected by the geometric correction method, but the angular deviation also needs to be controlled within a small range because a certain degree of distortion is caused. The method mainly comprises the steps of automatically placing a plurality of display panels, determining the position range of the display panels on a display panel carrying platform, selecting the central position of the display panels, taking the central position as a reference, and manually adjusting the image taking angle of the image taking camera, so that the images of the display panels can be within the deviation allowable range under most conditions.
However, after the image capturing angle of the image capturing camera is manually adjusted, if the deviation occurs again in the automatic film placing of the display panel and the image capturing angle of the image capturing camera cannot be manually adjusted in time, a large amount of image distortion of the display panel is caused, and the image capturing accuracy is reduced.
Disclosure of Invention
A first aspect of the embodiments of the present application provides an image capturing method for a display panel, including:
lighting the display panel;
capturing images of the lightened display panel through an image capturing camera to generate a display panel image;
searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image;
calculating a longitudinal parameter according to the at least two vertex coordinates;
judging whether the longitudinal parameter is larger than a preset threshold value or not;
if not, calculating a deviation correction angle according to the coordinates of the at least two vertexes;
and adjusting the image capturing angle of the image capturing camera according to the deviation correction angle.
Optionally, the adjusting the image capturing angle of the image capturing camera according to the deviation correction angle includes:
and controlling an adjusting motor arranged on the image capturing camera according to the deviation correction angle so as to adjust the image capturing angle of the image capturing camera.
Optionally, the lighting the display panel includes:
and lightening the display panel through the pressure head device.
Optionally, before the lighting of the display panel by the indenter device, the image capturing method further includes:
the pressing head angle of the display panel and the pressing head device is corrected.
Optionally, after the determining whether the longitudinal parameter is greater than a preset threshold, the image capturing method further includes:
if yes, a deviation alarm is given.
A second aspect of the embodiments of the present application provides an image capturing device for a display panel, including:
a lighting unit configured to light the display panel;
the generating unit is used for capturing images of the lightened display panel through an image capturing camera so as to generate a display panel image;
the acquisition unit is used for searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image;
the first calculation unit is used for calculating a longitudinal parameter according to the at least two vertex coordinates;
the judging unit is used for judging whether the longitudinal parameter is larger than a preset threshold value or not;
the second calculating unit is used for calculating a deviation correction angle according to the at least two vertex coordinates when the judging unit determines that the longitudinal parameter is not larger than a preset threshold value;
and the adjusting unit is used for adjusting the image capturing angle of the image capturing camera according to the deviation correcting angle.
Optionally, the adjusting unit specifically includes:
and controlling an adjusting motor arranged on the image capturing camera according to the deviation correction angle so as to adjust the image capturing angle of the image capturing camera.
Optionally, the lighting unit specifically includes:
and lightening the display panel through the pressure head device.
Optionally, the image capturing apparatus further includes:
and the correction unit is used for correcting the pressing head angle of the display panel and the pressing head device.
Optionally, the image capturing apparatus further includes:
and the alarm unit is used for carrying out deviation alarm when the judgment unit determines that the longitudinal parameter is greater than a preset threshold value.
A third aspect of the embodiments of the present application provides an image capturing apparatus for a display panel, including:
the device comprises a processor, a memory, an input and output unit and a bus;
the processor is connected with the memory, the input and output unit and the bus;
the processor specifically performs the following operations:
lighting the display panel;
capturing images of the lightened display panel through an image capturing camera to generate a display panel image;
searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image;
calculating a longitudinal parameter according to the at least two vertex coordinates;
judging whether the longitudinal parameter is larger than a preset threshold value or not;
if not, calculating a deviation correction angle according to the coordinates of the at least two vertexes;
and adjusting the image capturing angle of the image capturing camera according to the deviation correction angle.
Optionally, the processor is further configured to perform the operations of any of the alternatives of the first aspect.
According to the technical scheme, the embodiment of the application has the following advantages:
the method comprises the steps of firstly lightening a display panel, and then taking images of the lightened display panel through an image taking camera to generate a display panel image. And searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image, and calculating longitudinal parameters according to the at least two vertex coordinates. And when the longitudinal parameter is not greater than the preset threshold value, calculating a deviation correction angle according to the at least two vertex coordinates, and finally adjusting the image capturing angle of the image capturing camera according to the deviation correction angle.
Drawings
Fig. 1 is a schematic flowchart illustrating an embodiment of a method for calibrating an image capturing angle according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart illustrating an embodiment of a method for calibrating an image capturing angle according to the present application;
fig. 3 is a schematic flowchart illustrating another embodiment of an apparatus for calibrating an image capturing angle according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart illustrating another embodiment of an apparatus for calibrating an image capturing angle according to an embodiment of the present disclosure;
fig. 5 is a schematic flowchart illustrating another embodiment of an apparatus for calibrating an image capturing angle according to an embodiment of the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of the present invention.
The embodiment of the application discloses a method and a device for correcting an image capturing angle, which are used for improving the image capturing precision.
In this embodiment, the method for correcting the image capturing angle may be implemented in a system, a server, or a terminal, and is not specifically limited. For convenience of description, the embodiment of the present application uses a terminal as an example for description of an execution subject.
Referring to fig. 1, an embodiment of the present application provides a method for correcting an image capturing angle, including:
101. lighting the display panel;
after the display panel is placed on the display panel carrying platform, the terminal lights the display panel, and the terminal lights the display screen, so that the display screen displays a specific gray scale picture, and an image of the display panel obtained after image taking can display the effect of each pixel point.
102. Capturing images of the lightened display panel through an image capturing camera to generate a display panel image;
after the terminal lights the display panel, the terminal needs to capture an image of the lighted display panel by the image capture camera, so that the camera generates an image of the display panel.
103. Searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image;
when the terminal captures the image of the lighted display panel through the image capture camera and generates a display panel image, the terminal searches an image area of the display panel image to acquire at least two vertex coordinates of the display panel positioned in the display panel image.
For example: the method comprises the steps of taking an image of a rectangular display panel through an image-taking camera, after a display panel image is generated at a terminal, using inspection software to search the final panel inspection area of the display panel image, and obtaining four vertex coordinates of the panel inspection area, wherein only two vertex coordinates of opposite angles are required to be obtained and are respectively marked as (X1, Y1) and (X2, Y2).
104. Calculating a longitudinal parameter according to the at least two vertex coordinates;
the terminal calculates a longitudinal parameter according to at least two vertex coordinates, wherein the longitudinal parameter refers to the length of the longitudinal direction and is calculated by subtracting Y1 from Y2 and taking an absolute value. Specifically, the vertex needs to be input into the detection software host, and then the detection software host performs calculation.
105. Judging whether the longitudinal parameter is larger than a preset threshold value or not;
the terminal judges whether the longitudinal parameter is larger than a preset threshold value or not, and the longitudinal parameter can represent the deviation degree of the display panel.
106. If not, calculating a deviation correction angle according to the coordinates of the at least two vertexes;
the vertical parameter may indicate a deviation degree of the display panel, and when the terminal determines that the deviation length is not greater than the preset threshold, the image capturing camera may perform corresponding adjustment, and then the deviation correction angle needs to be calculated according to the at least two vertex coordinates. The calculation method is as follows:
θ＝arctan[(Y2-Y1)/(X2-X1)]
the deviation correction angle is used for adjusting the image capturing angle of the image capturing camera.
107. And adjusting the image capturing angle of the image capturing camera according to the deviation correction angle.
After calculating the deviation correction angle according to the at least two vertex coordinates, the terminal adjusts the image capturing angle of the image capturing camera according to the deviation correction angle. The specific adjustment mode may be to control the rotation of the image capturing camera through a motor, or may be implemented through a rotating device, which is not limited herein.
The method comprises the steps of firstly lightening a display panel, and then taking images of the lightened display panel through an image taking camera to generate a display panel image. And searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image, and calculating longitudinal parameters according to the at least two vertex coordinates. And when the longitudinal parameter is not greater than the preset threshold value, calculating a deviation correction angle according to the at least two vertex coordinates, and finally adjusting the image capturing angle of the image capturing camera according to the deviation correction angle.
Referring to fig. 2, an embodiment of the present application provides a method for correcting an image capturing angle, including:
201. correcting the pressing head angle of the display panel and the pressing head device;
after the display panel is placed on the display panel carrying platform, the terminal is required to correct the pressing head angle of the display panel and the pressing head device, and the display panel and the pressing head device are sent to the inspection station to be lightened and take an image after correction.
202. The display panel is lightened through the pressure head device;
the terminal lights the display panel through the indenter device, and in the automatic optical inspection apparatus, the inspection accuracy depends on the display panel image photographed at the time of image pickup. Due to the characteristics of some display panels, for example, the characteristics of the flexible OLED panel, the flexible printed circuit is adopted, and the flexible printed circuit has a certain length, when the flexible printed circuit is folded and connected to the front panel, the object mainly used for angle compensation and position correction is the panel pressure head, and the position changes of the flexible OLED panel and the pressure head device are not absolutely synchronous, so that the panel inevitably generates angle deviation relative to the camera.
203. Capturing images of the lightened display panel through an image capturing camera to generate a display panel image;
204. searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image;
205. calculating a longitudinal parameter according to the at least two vertex coordinates;
206. judging whether the longitudinal parameter is larger than a preset threshold value or not;
207. if not, calculating a deviation correction angle according to the coordinates of the at least two vertexes;
208. If yes, performing deviation alarm;
and when the terminal determines that the deviation length is larger than the preset threshold value, determining that a large error action exists in the film release, and performing Alarm Alarm to manually correct the large error action.
209. And controlling an adjusting motor arranged on the image capturing camera according to the deviation correction angle so as to adjust the image capturing angle of the image capturing camera.
And the terminal controls an adjusting motor arranged on the image capturing camera according to the deviation correction angle so as to adjust the image capturing angle of the image capturing camera. Specifically, the terminal transmits the calculated deviation correction angle to a Programmable Logic Controller (PLC) through detection software Host, the PLC adjusts a motor installed on the image capturing camera, and the adjusted image capturing angle is applied to the next display panel for image capturing. Wherein the motor in this embodiment is a θ -axis servo motor.
The method comprises the steps of firstly lightening a display panel, and then taking images of the lightened display panel through an image taking camera to generate a display panel image. And searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image, and calculating longitudinal parameters according to the at least two vertex coordinates. And when the longitudinal parameter is not greater than the preset threshold value, calculating a deviation correction angle according to the at least two vertex coordinates, and finally adjusting the image capturing angle of the image capturing camera according to the deviation correction angle.
Secondly, the image capturing camera is coordinately controlled through the programmable logic controller PLC and the theta axis servo motor, manual control is not needed, and automatic correction is firstly carried out.
Referring to fig. 3, an embodiment of the present application provides an image capturing apparatus for a display panel, including:
a lighting unit 301 configured to light a display panel;
a generating unit 302, configured to capture an image of the illuminated display panel by an image capture camera to generate a display panel image;
an obtaining unit 303, configured to perform image area search on the display panel image to obtain at least two vertex coordinates of the display panel located in the display panel image;
a first calculation unit 304 for calculating a longitudinal parameter from the at least two vertex coordinates;
a judging unit 305, configured to judge whether the longitudinal parameter is greater than a preset threshold;
a second calculating unit 306, configured to calculate a deviation correction angle according to the at least two vertex coordinates when the determining unit 305 determines that the longitudinal parameter is not greater than a preset threshold;
an adjusting unit 307, configured to adjust an image capturing angle of the image capturing camera according to the deviation correction angle.
Referring to fig. 4, an embodiment of the present application provides another image capturing apparatus with a display panel, including:
a correction unit 401 for correcting the indenter angle of the indenter device and the display panel;
a lighting unit 402 configured to light the display panel;
optionally, the lighting unit 402 specifically includes:
and lightening the display panel through the pressure head device.
A generating unit 403, configured to image the illuminated display panel through an image capturing camera to generate a display panel image;
an obtaining unit 404, configured to perform image area search on the display panel image to obtain at least two vertex coordinates of the display panel located in the display panel image;
a first calculation unit 405 for calculating a longitudinal parameter from the at least two vertex coordinates;
a determining unit 406, configured to determine whether the longitudinal parameter is greater than a preset threshold;
a second calculating unit 407, configured to calculate a deviation correction angle according to the at least two vertex coordinates when the determining unit 406 determines that the longitudinal parameter is not greater than a preset threshold;
an alarm unit 408, configured to perform a deviation alarm when the determining unit 406 determines that the longitudinal parameter is greater than a preset threshold;
an adjusting unit 409, configured to adjust an image capturing angle of the image capturing camera according to the deviation correction angle.
Optionally, the adjusting unit 409 specifically includes:
and controlling an adjusting motor arranged on the image capturing camera according to the deviation correction angle so as to adjust the image capturing angle of the image capturing camera.
Referring to fig. 5, an embodiment of the present application provides another image capturing apparatus with a display panel, including:
a processor 501, a memory 502, an input/output unit 503, and a bus 504;
the processor 501 is connected with the memory 502, the input/output unit 503 and the bus 504;
the processor 501 specifically performs the following operations:
lighting the display panel;
capturing images of the lightened display panel through an image capturing camera to generate a display panel image;
searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image;
calculating a longitudinal parameter according to the at least two vertex coordinates;
judging whether the longitudinal parameter is larger than a preset threshold value or not;
if not, calculating a deviation correction angle according to the coordinates of the at least two vertexes;
and adjusting the image capturing angle of the image capturing camera according to the deviation correction angle.
In this embodiment, the functions of the processor 501 correspond to the steps in the embodiments shown in fig. 1 and fig. 4, and are not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.
Claims (10)
1. An image capturing method for a display panel, comprising:
lighting the display panel;
capturing images of the lightened display panel through an image capturing camera to generate a display panel image;
searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image;
calculating a longitudinal parameter according to the at least two vertex coordinates;
judging whether the longitudinal parameter is larger than a preset threshold value or not;
if not, calculating a deviation correction angle according to the coordinates of the at least two vertexes;
and adjusting the image capturing angle of the image capturing camera according to the deviation correction angle.
2. The image capturing method as claimed in claim 1, wherein said adjusting the image capturing angle of the image capturing camera according to the deviation correction angle comprises:
and controlling an adjusting motor arranged on the image capturing camera according to the deviation correction angle so as to adjust the image capturing angle of the image capturing camera.
3. The image capturing method as claimed in claim 1, wherein said illuminating the display panel comprises:
and lightening the display panel through the pressure head device.
4. The image capturing method according to claim 3, wherein before the lighting of the display panel by the indenter device, the image capturing method further comprises:
the pressing head angle of the display panel and the pressing head device is corrected.
5. The image capturing method according to any one of claims 1 to 4, wherein after the determining whether the longitudinal parameter is greater than a preset threshold, the image capturing method further includes:
if yes, a deviation alarm is given.
6. An image capturing device for a display panel, comprising:
a lighting unit configured to light the display panel;
the generating unit is used for capturing images of the lightened display panel through an image capturing camera so as to generate a display panel image;
the acquisition unit is used for searching image areas of the display panel image to acquire at least two vertex coordinates of the display panel positioned on the display panel image;
the first calculation unit is used for calculating a longitudinal parameter according to the at least two vertex coordinates;
the judging unit is used for judging whether the longitudinal parameter is larger than a preset threshold value or not;
the second calculating unit is used for calculating a deviation correction angle according to the at least two vertex coordinates when the judging unit determines that the longitudinal parameter is not larger than a preset threshold value;
and the adjusting unit is used for adjusting the image capturing angle of the image capturing camera according to the deviation correcting angle.
7. The image capturing apparatus as claimed in claim 6, wherein the adjusting unit is specifically:
and controlling an adjusting motor arranged on the image capturing camera according to the deviation correction angle so as to adjust the image capturing angle of the image capturing camera.
8. The image capturing apparatus as claimed in claim 6, wherein the lighting unit is specifically:
and lightening the display panel through the pressure head device.
9. The image capturing apparatus as claimed in claim 8, further comprising:
and the correction unit is used for correcting the pressing head angle of the display panel and the pressing head device.
10. The image capturing apparatus as claimed in any one of claims 6 to 9, further comprising:
and the alarm unit is used for carrying out deviation alarm when the judgment unit determines that the longitudinal parameter is greater than a preset threshold value.
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| CN115061294A (en) * | 2022-06-28 | 2022-09-16 | Tcl华星光电技术有限公司 | Method and system for repairing defects of liquid crystal display panel and storage medium |
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