CN112985767A - Method for shooting pixel brightness of display panel and related device - Google Patents
Method for shooting pixel brightness of display panel and related device Download PDFInfo
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Abstract
The embodiment of the application discloses a method and a related device for shooting pixel brightness of a display panel, which are used for improving the data accuracy of a shooting device obtained on a curved surface of an OLED (organic light emitting diode) of the display panel and further improving the quality of mura defect compensation. The method in the embodiment of the application comprises the following steps: acquiring display panel specification information of a target display panel, wherein the target display panel is provided with a curved surface; determining a shooting device according to the specification information of the display panel, wherein the shooting device is used for shooting a target display panel; determining shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information; starting the shooting device and the target display panel according to the shooting flow information so that the shooting device vertically shoots each pixel of the target display panel according to a preset path; acquiring shooting data generated by a shooting device; and integrating the shooting data through a preset algorithm to generate pixel brightness data of the target display panel.
Description
Technical Field
The embodiment of the application relates to the field of display panel detection, in particular to a method and a related device for shooting pixel brightness of a display panel.
Background
With the continuous development of information display technology, the display panel OLED basically replaces the conventional display panel LCD gradually by virtue of its advantages of self-luminescence, flexibility, wide viewing angle, fast response speed, simple manufacturing process, and the like, and is rapidly and deeply applied to various fields of modern society.
However, as the market demands higher and higher display quality of the display panel OLED, the appearance design requirements are more and more diversified, and the shipment volume and the appearance design requirements of electronic products such as mobile phones, tablet computers and the like are also higher and higher, for example: bang screen, water drop screen, curved screen, etc. Among them, there is a strong demand for a display panel having a curved surface with a large curvature, but due to the process level of the display panel OLED and the limitation of objective environmental factors, the display panel OLED may have various mura defects, and thus, the mura defect compensation technology before shipment is largely applied to the actual production of the display panel OLED. In the application process of the mura defect compensation technology, the main key links of the mura defect compensation technology are image capture and data processing of the display panel OLED, wherein shooting of the pixel brightness of the display panel OLED is an indispensable link and has a determining factor for the mura defect compensation quality. Referring to fig. 1, currently, for a display panel OLED without a curved surface, a commonly used method for capturing pixel brightness mainly uses a robot arm (1) to control an area array CCD camera (2), and vertically and oppositely places the camera on a carrier (3), and captures a display panel OLED (5) lighted by a ceramic adsorption jig (4). Referring to fig. 2, currently, for a display panel OLED with a curved surface, a common method is to control an area array CCD camera or a linear array CDD camera (2) through a robot arm (1), vertically shoot and place the display panel OLED on a carrier (3), add a prism (6) to a plane portion of the display panel OLED (5) lighted by a ceramic adsorption jig (4), and shoot the display panel OLED through refraction of the prism.
Due to the fact that the refraction and astigmatism phenomena exist in the radian of the curved surface of the display panel OLED and the light splitting and astigmatism phenomena of the prism, the accuracy of data acquired by the curved surface of the display panel OLED is reduced, and further the quality of mura defect compensation is reduced.
Disclosure of Invention
A first aspect of an embodiment of the present application provides a method for shooting pixel brightness of a display panel, including:
acquiring display panel specification information of a target display panel, wherein the target display panel is provided with a curved surface;
determining a shooting device according to the specification information of the display panel, wherein the shooting device is used for shooting the target display panel;
determining shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information;
starting the shooting device and the target display panel according to the shooting flow information so that the shooting device vertically shoots each pixel of the target display panel according to a preset path;
acquiring shooting data generated by the shooting device;
and integrating the shooting data through a preset algorithm to generate pixel brightness data of the target display panel.
Optionally, the display panel specification information includes display panel resolution information and display panel size information.
Optionally, the determining the shooting process information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information includes:
and determining the shooting flow information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel and the size information of the display panel.
Optionally, the shooting flow information includes shooting track information, focusing distance information, and shooting step information.
Optionally, the determining the shooting process information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel, and the display panel size information includes:
and determining the shooting track information, the focusing distance information and the shooting step length information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel and the display panel size information.
Optionally, the starting the shooting device and the target display panel according to the shooting process information includes:
displaying a preset gray scale picture on the target display panel according to the shooting process information, and starting the shooting device according to the shooting process information.
Optionally, the integrating the shooting data through a preset algorithm to generate pixel brightness data of the target display panel includes:
and integrating the shooting data through a mean algorithm to generate pixel brightness data of the target display panel.
A second aspect of the embodiments of the present application provides an apparatus for photographing pixel brightness of a display panel, including:
a first acquisition unit configured to acquire display panel specification information of a target display panel, the target display panel having a curved surface;
a first determination unit, configured to determine, according to the display panel specification information, a shooting device, where the shooting device is configured to shoot the target display panel;
the second determining unit is used for determining shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information;
the starting unit is used for starting the shooting device and the target display panel according to the shooting flow information so that the shooting device vertically shoots each pixel of the target display panel according to a preset path;
a second acquisition unit configured to acquire the shooting data generated by the shooting device;
and the generating unit is used for integrating the shooting data through a preset algorithm so as to generate pixel brightness data of the target display panel.
Optionally, the display panel specification information includes display panel resolution information and display panel size information.
Optionally, the second determining unit specifically includes:
and determining the shooting flow information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel and the size information of the display panel.
Optionally, the shooting flow information includes shooting track information, focusing distance information, and shooting step information.
Optionally, the second determining unit specifically includes:
and determining the shooting track information, the focusing distance information and the shooting step length information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel and the display panel size information.
Optionally, the starting unit specifically includes:
displaying a preset gray scale picture on the target display panel according to the shooting process information, and starting the shooting device according to the shooting process information.
Optionally, the generating unit specifically includes:
and integrating the shooting data through a mean algorithm to generate pixel brightness data of the target display panel.
A third aspect of the embodiments of the present application provides an apparatus for photographing pixel brightness of 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:
acquiring display panel specification information of a target display panel, wherein the target display panel is provided with a curved surface;
determining a shooting device according to the specification information of the display panel, wherein the shooting device is used for shooting the target display panel;
determining shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information;
starting the shooting device and the target display panel according to the shooting flow information so that the shooting device vertically shoots each pixel of the target display panel according to a preset path;
acquiring shooting data generated by the shooting device;
and integrating the shooting data through a preset algorithm to generate pixel brightness data of the target display panel.
Optionally, the processor is further configured to perform the operations of any of the alternatives of the first aspect.
A computer readable storage medium having a program stored thereon, the program, when executed on a computer, performing the method of the first aspect as well as 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, obtaining display panel specification information of a target display panel, and determining the display panel specification information to be used for a shooting device. And determining the shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information. And starting the shooting device and the target display panel according to the shooting flow information so that the shooting device shoots the target display panel according to a preset path. And acquiring shooting data generated by the shooting device, and integrating the shooting data to generate pixel brightness data of the target display panel. According to the method, the shooting flow information of the shooting device is set, so that the shooting device can vertically shoot each pixel of the target display panel in the shooting process, the refraction and astigmatism phenomena of the curved surface part of the target display panel are reduced, the accuracy of data acquired by the shooting device on the curved surface of the target display panel is improved, and the mura defect compensation quality is improved.
Drawings
FIG. 1 is a schematic diagram of a pixel brightness shot of a flat display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a pixel brightness shot of a display panel with a curved surface according to an embodiment of the present disclosure;
FIG. 3 is a flowchart illustrating an embodiment of a method for capturing pixel brightness of a display panel according to an embodiment of the present disclosure;
FIG. 4 is a flowchart illustrating a method for capturing pixel brightness of a display panel according to another embodiment of the present disclosure;
FIG. 5 is another schematic diagram of a pixel brightness shot of a display panel with a curved surface according to an embodiment of the present disclosure;
FIG. 6 is a diagram illustrating timing synchronization between a camera and a target display panel according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of camera movement control in an embodiment of the present application;
FIG. 8 is a schematic diagram of line-by-line shooting acquisition of a camera in the embodiment of the present application;
FIG. 9 is a flowchart illustrating an embodiment of an apparatus for capturing luminance of pixels of a display panel according to the present disclosure;
fig. 10 is a flowchart of another embodiment of an apparatus for capturing luminance of pixels of a display panel 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 related device for shooting pixel brightness of a display panel, which are used for improving the reduction of data accuracy obtained by a shooting device on a curved surface of an OLED (organic light emitting diode) of the display panel and further improving the quality of mura defect compensation.
In this embodiment, the method for capturing the pixel brightness of the display panel 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. 3, an embodiment of the present application provides a method for capturing pixel brightness of a display panel, including:
301. acquiring display panel specification information of a target display panel, wherein the target display panel is provided with a curved surface;
the terminal acquires the specification information of the display panel of the target display panel, and for the detected display panel, the specification information of the display panel needs to be acquired, and then corresponding pixel brightness detection can be carried out.
The processing of the pixel brightness data is crucial to the mura defect compensation technology, the pixel brightness data of the target display panel can be effectively and accurately shot to determine the quality of the mura defect compensation technology result, and the luminous pixels on the display panel are all composed of orderly arranged sub-pixels. One of the key steps of the mura defect compensation technology is to accurately capture the brightness of the pixels of the target display panel by a proper capture method.
The specification information of the display panel includes not only the size information of the display panel of the target display panel, but also the resolution information of the display panel, the curvature of the curved surface of the display panel, the radius of the curved surface, and the like, and is not limited herein. As long as the calculation data required in the present embodiment is related to the target display panel, the calculation data is regarded as the display panel specification information, and the protection scope of the present embodiment is included.
302. Determining a shooting device according to the specification information of the display panel, wherein the shooting device is used for shooting the target display panel;
and the terminal determines to be used for a shooting device according to the specification information of the display panel, and the shooting device is used for shooting the target display panel. The photographing device is an apparatus that photographs a target display panel, and the specification of the target display panel determines what specification of photographing device needs to be used, for example: it is necessary to select a corresponding camera according to the resolution of the target display panel, or select a camera with a camera lens portion corresponding to the size and shape data of the target display panel, which is not limited herein.
In this embodiment, the shooting device is mainly divided into a camera module and a displacement module, the camera is used for shooting the target display panel to acquire data, and the displacement module is used for controlling the camera module to move, so that the camera module shoots the target display panel by a preset path and a preset angle.
In this embodiment, the camera module may be a linear array CCD camera or an area array CCD camera, which is not limited herein, and any camera type that can complete the shooting of the pixel brightness on the target display panel belongs to the protection scope of the camera module in this embodiment.
In this embodiment, the displacement module may be specifically an air cylinder or a robot arm, and the displacement module is not limited herein, and any equipment capable of completing the predetermined displacement motion and angle transformation of the traction camera module belongs to the protection range of the displacement module in this embodiment.
303. Determining shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information;
and the terminal determines the shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information. The imaging specification information determines the imaging capability of the imaging device, and the form in which pixel luminance data is derived at the time of imaging. The display panel specification information determines data such as a traveling route and a step length of the photographing device, and the photographing specification information and the display panel specification information can determine an optimal displacement route, a step length per displacement, whether a dwell time is required, a photographing angle and the like of the photographing device, and are not limited herein.
304. Starting the shooting device and the target display panel according to the shooting flow information so that the shooting device vertically shoots each pixel of the target display panel according to a preset path;
and the terminal starts the shooting device and the target display panel according to the shooting flow information. In the data acquisition process, firstly, the shooting device and the target display panel need to be started, the target display panel needs to perform screen touch operation and receive certain current and voltage, so that the target display panel displays a preset picture, and at this time, the data shot by the shooting device is pixel brightness data of the target display panel on the preset picture.
It should be noted that, the photographing device only photographs 1 line or N lines of pixels of the target display panel at a time, and the preset picture is displayed on the target display panel in order to make the 1 line or N lines of pixels generate a certain brightness for the photographing device to photograph. In the shooting process, the shooting device only aims at 1 line or N lines of pixels, the shooting device is displaced, and the lens of the camera module is aligned to the center of the 1 line or N lines of pixels, so that the effect of vertical shooting is achieved. The photographing device photographs pixels of 1 line or N lines of the target display panel one by one (N is a positive integer) in this manner until all lines of the target display panel are photographed. In the shooting mode, the refraction and astigmatism phenomena of the curved surface part of the target display panel are reduced, the accuracy of data acquired by the shooting device on the curved surface of the target display panel is improved, and the mura defect compensation quality is improved.
305. Acquiring shooting data generated by the shooting device;
after the shooting device and the target display panel are started, the terminal acquires shooting data generated by the shooting device in the shooting process, converts image data shot by the shooting device into digital data, transmits the digital data into data processing equipment, and performs integration operation to acquire pixel brightness data.
306. And integrating the shooting data through a preset algorithm to generate pixel brightness data of the target display panel.
The terminal integrates shooting data acquired from the shooting device through a preset algorithm to generate pixel brightness data of the target display panel, and the pixel brightness data are used for carrying out mura defect compensation on the target display panel. The shooting data is composed of a plurality of groups of data because the shooting device needs to collect 1 line or N lines of pixels each time, and multiple times of shooting can be carried out on the same 1 line or N lines of pixels.
After the shooting data of the shooting device is acquired, multiple sets of data need to be integrated to generate pixel brightness data that can be used for mura defect compensation of the target display panel.
The method comprises the steps of firstly, obtaining display panel specification information of a target display panel, and determining the display panel specification information to be used for a shooting device. And determining the shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information. And starting the shooting device and the target display panel according to the shooting flow information so that the shooting device shoots the target display panel according to a preset path. And acquiring shooting data generated by the shooting device, and integrating the shooting data through a preset algorithm to generate pixel brightness data of the target display panel. According to the method, the shooting flow information of the shooting device is set, so that the shooting device can vertically shoot each pixel of the target display panel in the shooting process, the refraction and astigmatism phenomena of the curved surface part of the target display panel are reduced, the accuracy of data acquired by the shooting device on the curved surface of the target display panel is improved, and the mura defect compensation quality is improved.
Referring to fig. 4, an embodiment of the present application provides a method for capturing pixel brightness of a display panel, including:
401. acquiring display panel specification information of a target display panel, wherein the target display panel is provided with a curved surface;
402. determining a shooting device according to the specification information of the display panel, wherein the shooting device is used for shooting the target display panel;
403. Determining shooting track information, focusing distance information and shooting step length information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel and the size information of the display panel;
and the terminal determines the shooting track information, the focusing distance information and the shooting step length information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel and the display panel size information. The resolution information of the display panel is the number of pixel points in a row and a column of the display panel, and the size information of the display panel is the size of the target display panel, the arc length of the curved surface and other information. And the terminal determines shooting track information, focusing distance information and shooting step length information in the shooting process according to the information. The shooting track information refers to a path from a starting point to an end point of the shooting device, and in the embodiment, the shooting track information can be determined by aligning the camera center with the center line of the display panel. The focusing distance information is used for setting the distance between the shooting device and the display panel so that the shooting device can accurately focus each line of pixels of the display panel. The shooting step length information is the distance of displacement of the shooting device, and the shooting device can accurately enter the range of the next line or N lines by the advancing step length when the displacement is carried out every time.
404. Displaying a preset gray scale picture on the target display panel according to the shooting process information, and starting the shooting device according to the shooting process information so that the shooting device vertically shoots each pixel of the target display panel according to a preset path;
and the terminal displays a preset gray scale picture on the target display panel according to the shooting flow information and starts the shooting device according to the shooting flow information. In the detection process, the display panel needs to display gray-scale pictures so that the shooting device can shoot the brightness of the gray-scale pictures. In the operation process of the shooting device, the target display panel needs to continuously switch gray scale pictures and acquire shooting data of pixel brightness from dark to bright of the target display panel.
405. Acquiring shooting data generated by the shooting device;
step 405 in this embodiment is similar to step 105 in the previous embodiment, and is not described herein again.
406. And integrating the shooting data through a mean algorithm to generate pixel brightness data of the target display panel.
And the terminal integrates the shot data through an average algorithm to generate pixel brightness data of the target display panel. After the terminal collects pixel brightness images of each line of the target display panel for multiple times through the shooting device, integration of an average algorithm needs to be carried out on multiple groups of data so as to obtain pixel brightness data of a corresponding gray scale picture.
In this embodiment, first, the display panel specification information of the target display panel is acquired, and the display panel specification information is determined to be used for the photographing apparatus. And determining the shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information. And starting the shooting device and the target display panel according to the shooting flow information so that the shooting device shoots the target display panel according to a preset path. And acquiring shooting data generated by the shooting device, and integrating the shooting data through a mean value algorithm to generate pixel brightness data of the target display panel. According to the method, the shooting flow information of the shooting device is set, so that the shooting device can vertically shoot each pixel of the target display panel in the shooting process, the refraction and astigmatism phenomena of the curved surface part of the target display panel are reduced, the accuracy of data acquired by the shooting device on the curved surface of the target display panel is improved, and the mura defect compensation quality is improved.
The following specific steps of the shooting process are exemplified:
referring to fig. 5, the main hardware devices in this embodiment are a robot arm (1), a line CCD camera (2), a stage (3), a ceramic adsorption jig (4), and a display Panel (Panel & Active Area) (5) having a curved surface.
Microscope carrier (3) are used for holding display Panel (Panel & Active Area) (5) that have the curved surface, and pottery adsorbs tool (4) are used for adsorbing fixed display Panel (5) that have the curved surface to be responsible for carrying out some screen operations, grey scale picture display work promptly to display Panel (5). The robot arm (1) is used for controlling the linear array CCD camera (2) to move, and the linear array CCD camera (2) is used for shooting a display Panel (Panel & Active Area) (5) with a curved surface when moving.
In this case, a plurality of software in hardware equipment is also referred to, and for detailed description, a plurality of hardware in fig. 5 can be divided into a lighting module, a synchronization module, a linear array CCD camera (2) movement control module and a data processing module according to functions. It should be noted that each hardware may be divided into different modules because each hardware has a plurality of functions.
The hardware of the lighting module can be subdivided into Pattern Generators (PG), industrial PCs, ceramic adsorption jigs, and display panels (Panel & Active Area) (5) having curved surfaces. The software of the lighting module can be divided into an upper computer and PG software which is in charge of communicating with the upper computer.
The lighting module has the functions of: the upper computer controls PG software to perform dot screen operation and gray scale image switching operation on a corresponding display Panel (Panel & Active Area) (5) with a curved surface, namely, the display Panel performs gray scale image display and switching operation.
The connection mode of the hardware of the lighting module is as follows: the industrial PC is connected with a Pattern Generator (PG) through a network port or a serial port, and the Pattern Generator (PG) is connected with a display Panel (Panel & Active Area) (5) with a curved surface through MIPI, LVDS, EDP and the like.
The synchronous modules are mainly a Pattern Generator (PG) and a line CCD camera (2). The line CCD camera (2) is connected with the Pattern Generator (PG) through a CameraLink or a CXP mode and the like. The synchronization module functions as: when the linear array CCD camera (2) performs shooting, the linear array CCD camera and the Pattern Generator (PG) perform display pictures, namely, the linear array CCD camera (2) and the Pattern Generator (PG) keep synchronous in the running process, so that pictures acquired by a shooting device in the shooting process are not distorted.
Referring to FIG. 6, a schematic diagram of the synchronization timing is shown in FIG. 6.
The tDly Time is the delay Time before exposure shooting, the EXP Time is the exposure Time from the rising edge triggering to the exposure shooting, the rising edge and the delay Time, and the exposure Time can be set according to the actual monochrome or pure color images of the pictures displaying different gray scales. SYNC is a synchronization signal that can be set to a rising edge or falling edge synchronization trigger. The ceramic adsorption jig realizes that a display Panel (Panel & Active Area) (5) with a curved surface displays pure colors or monochromatic images of different gray-scale pictures by switching pictures, and is set according to actual requirements. Wherein, Shutter turns on Trigger for exposure.
The main hardware of the camera moving control module is a robot arm (1), a PLC and a linear array CCD camera (2). The function of controlling the camera movement module is: on the basis of an optical module matched with the linear array CCD camera (2), the linear array CCD camera (2) operates according to a set circuit to assist in carrying out a shooting function, and the main function of the system is to enable a PLC to accurately control a robot arm (1) and drive the linear array CCD camera (2) to move. The linear array CCD camera (2) displacement is controlled to mainly comprise three steps:
in a first step, a suitable camera is selected and the distance of the camera from the display panel is determined. According to the linear array CCD camera (2) and matched optical modules such as LENS and the like, automatic focusing is carried out on a display Panel (Panel & Active Area) (5) with a curved surface, and the distance between the linear array CCD camera (2) and the display Panel is determined according to the resolution of the display Panel, the radian of the curved surface at the edge of the display Panel and other data. The resolution of the line camera used in this embodiment needs to be determined according to the resolution of the actual display panel.
And secondly, determining the moving step length, namely the displacement precision, of the linear array CCD camera (2). Suppose that the resolution of a display Panel (Panel & Active Area) (5) with a curved surface is H V, the specifications M N of a linear array camera are the number of pixels in the horizontal direction and the vertical direction of the display Panel respectively, and M and N are the horizontal resolution and the number of photographable lines (columns) of a linear array CCD camera (2) respectively. And controlling the moving precision of the linear array CCD camera (2) to reach the um level. Assuming that the width of each row of pixels is W, the step size of each step of movement can be set for the flat portion of the display panel as:
Lstep＝W
or setting the moving step length of each time as the number of the shooting lines (columns) in a single time according to the specification and the actual requirement of the linear array CCD camera (2):
Lstep＝N*W
and when the linear array CCD camera (2) is moved, the linear array CCD camera (5) and a display Panel (Panel & Active Area) (5) with a curved surface are kept in a normal focusing state in real time, and the central axis of the linear array CCD camera (2) is always aligned with the central axis of the display Panel.
Referring to fig. 7, for the curved surface portion of the display Panel, the moving step length of the line CCD camera (2) needs to be calculated according to the following schematic diagram, assuming that the curvature of the curved surface is Rad, the radius of the curvature is r, and the focusing distance between the camera and the module Panel is h.
For the curved surface part of the display panel, the moving step length is as follows:
if the curved surface of the display panel is in up-and-down layout and has the same radian. The total moving distance of the linear array CCD camera (2) on the curved surface part can be calculated as follows:
S'＝2Rad*(h+r)
if the curved surface of the display panel is in a top-bottom layout and the radians are different, for example: the radian of the other side is Rad 'and the radius is r'. The total moving distance of the linear array CCD camera (2) on the curved surface part of the display panel can be calculated as follows:
S'＝Rad*(h+r)+Rad'*(h+r')
according to the schematic diagram, the length of the curved surface part of the display panel can be obtained:
Sarc of＝2Rad*r
Or the like, or, alternatively,
Sarc of＝Rad'*r'+Rad*r
The total moving distance of the linear array CCD camera (2) can be calculated, and if the curved surface of the display panel is in an up-and-down layout, the total moving distance is as follows:
Sgeneral assembly＝S'+V*W-SArc of
If the curved surface is left-right layout, the total moving distance is as follows:
Sgeneral assembly＝S'+H*W-SArc of
Meanwhile, the moving times of the linear array CCD camera (2) can be obtained as follows:
Num＝V
or the like, or, alternatively,
Num＝H
or the like, or, alternatively,
or the like, or, alternatively,
in the process that the robot arm (1) controls the linear array CCD camera (2) to move, the Pattern Generator (PG) controls the display panel to display a corresponding gray scale picture while synchronously controlling the linear array CCD camera (2) to shoot the display panel, for example: 32,64,96,160,192,224, etc. According to actual requirements, after exposure time of different gray scales is set, every time the linear array CCD camera (2) shoots one line or N lines, a corresponding picture needs to display a gray scale pure color picture or a monochrome RGB picture, and each gray scale picture is shot for a plurality of times (for example, k times) until all lines (or rows) are shot.
And the data integration module is used for integrating the relative brightness data extracted by calibrating all the rows (or columns) shot by the linear array CCD camera (2). The main hardware is acquisition card, and is connected with industrial PC and control software.
The following illustrates the specific steps of the data integration module:
for the gray levels (32,64,96,160,192,224) listed above, if the curved surface of the display panel is in a top-bottom layout, data integration can be performed according to three actual situations:
in the first case: the linear array CCD camera (2) has a moving step length of LstepW, wherein the linear CCD camera (2) shoots the curved surface part of the display panel with the moving step length of L'stepThe method comprises the following steps:
for a certain gray level, such as 224gray, the first row data is acquired by:
the k-th acquired data of the first row of data is as follows:
the first row of data obtained by averaging is:
thus, the last row of data can be obtained as follows:
the data of the whole gray scale picture can be obtained by integrating all the line data together:
in the second case: the linear array CCD camera (2) has a moving step length of LstepWherein, the linear CCD camera (2) shoots the curved surface part of the display panel and moves by the step length of L'stepThe method comprises the following steps:
for a certain gray level picture, for example: 224gray, the first N rows of data are:
the data of the whole gray level picture can be obtained by integrating the V/N groups of data together:
and N is finally added with 0 for the inexhaustible data items.
In the third case: referring to fig. 8, when the M × N line CCD camera (2) is selected, and the line CCD camera (2) is moved by a step length of LstepW, wherein the linear CCD camera (2) shoots the moving step length of the curved surface part of the display panel by L'stepThe method comprises the following steps:
in fig. 8, 1,2,3.. N is each line of pixels, k in the first line represents that k times are acquired in the 224gray display picture in the line, after moving according to a set step length, the scanning frequency of a new scanning line is k, the rest is 2 × k times, and so on, after moving N-1 step, the last line of the N lines of data shot by the first scanning is N × k times, and the rest is k,2k,3k. (N-1) × k times, and shooting is continued according to the above, and then all the lines of data can finish shooting and acquiring N × k times.
According to the steps, any row of data in the first N rows is as follows:
wherein j is more than or equal to 1 and less than or equal to N;
the other row data is:
wherein g is more than or equal to N +1 and less than or equal to V;
the data are integrated together to obtain the data of the whole gray scale picture.
The above description has been given by taking the curved surface of the display panel as a top-bottom layout and scanning the curved surface line by line, but if the curved surface is a left-right layout, scanning the curved surface line by line and replacing V, H, and the method is applicable to both RGB monochrome and W pure color.
Referring to fig. 9, an embodiment of the present invention provides an apparatus for capturing pixel brightness of a display panel, including:
a first acquiring unit 901 configured to acquire display panel specification information of a target display panel;
a first determining unit 902, configured to determine, according to the display panel specification information, a shooting device for shooting the target display panel;
a second determining unit 903, configured to determine shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information;
a starting unit 904, configured to start the shooting device and the target display panel according to the shooting process information, so that the shooting device vertically shoots each pixel of the target display panel according to a preset path;
a second acquisition unit 905 configured to acquire shooting data generated by the shooting apparatus;
a generating unit 906, configured to integrate the shooting data to generate pixel brightness data of the target display panel.
Optionally, the display panel specification information includes display panel resolution information and display panel size information.
Optionally, the second determining unit 903 specifically includes:
and determining the shooting flow information of the shooting device according to the display panel resolution information, the display panel size information and the display panel specification information of the shooting device.
Optionally, the shooting flow information includes shooting track information, focusing distance information, and shooting step information.
Optionally, the second determining unit 903 specifically includes:
and determining shooting track information, focusing distance information and shooting step length information of the shooting device according to the display panel resolution information, the display panel size information and the display panel specification information of the shooting device.
Optionally, the starting unit 904 specifically includes:
displaying a preset gray scale picture on the target display panel according to the shooting process information, and starting the shooting device according to the shooting process information.
Optionally, the generating unit 906 is specifically:
and integrating the shooting data through a mean algorithm to generate pixel brightness data of the target display panel.
Referring to fig. 10, another apparatus for classifying defects of a display panel according to an embodiment of the present application includes:
a processor 1001, a memory 1002, an input/output unit 1003, and a bus 1004;
the processor 1001 is connected to the memory 1002, the input-output unit 1003, and the bus 1004;
the processor 1001 specifically performs the following operations:
acquiring display panel specification information of a target display panel, wherein the target display panel is provided with a large-radian curved surface;
determining a shooting device according to the specification information of the display panel, wherein the shooting device is used for shooting the target display panel;
determining shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information;
starting the shooting device and the target display panel according to the shooting flow information so that the shooting device vertically shoots each pixel of the target display panel according to a preset path;
acquiring shooting data generated by the shooting device;
and integrating the shooting data to generate pixel brightness data of the target display panel.
In this embodiment, the functions of the processor 1001 correspond to the steps in the embodiments shown in fig. 3 to 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. A method for shooting pixel brightness of a display panel is characterized by comprising the following steps:
acquiring display panel specification information of a target display panel, wherein the target display panel is provided with a curved surface;
determining a shooting device according to the specification information of the display panel, wherein the shooting device is used for shooting the target display panel;
determining shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information;
starting the shooting device and the target display panel according to the shooting flow information so that the shooting device vertically shoots each pixel of the target display panel according to a preset path;
acquiring shooting data generated by the shooting device;
and integrating the shooting data through a preset algorithm to generate pixel brightness data of the target display panel.
2. The method of claim 1, wherein the display panel specification information comprises display panel resolution information and display panel size information.
3. The method of claim 2, wherein determining the shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information comprises:
and determining the shooting flow information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel and the size information of the display panel.
4. The method according to any one of claim 3, wherein the photographing flow information includes photographing track information, focusing distance information, and photographing step size information.
5. The method of claim 4, wherein determining the shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel resolution information and the display panel size information of the display panel comprises:
and determining the shooting track information, the focusing distance information and the shooting step length information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel and the display panel size information.
6. The method according to any one of claims 1 to 5, wherein the starting the photographing apparatus and the target display panel according to the photographing flow information comprises:
displaying a preset gray scale picture on the target display panel according to the shooting process information, and starting the shooting device according to the shooting process information.
7. The method according to any one of claims 1 to 5, wherein the integrating the shooting data through a preset algorithm to generate pixel brightness data of the target display panel comprises:
and integrating the shooting data through a mean algorithm to generate pixel brightness data of the target display panel.
8. An apparatus for luminance photographing of a pixel of a display panel, comprising:
a first acquisition unit configured to acquire display panel specification information of a target display panel, the target display panel having a curved surface;
a first determination unit, configured to determine, according to the display panel specification information, a shooting device, where the shooting device is configured to shoot the target display panel;
the second determining unit is used for determining shooting flow information of the shooting device according to the shooting specification information of the shooting device and the display panel specification information;
the starting unit is used for starting the shooting device and the target display panel according to the shooting flow information so that the shooting device vertically shoots each pixel of the target display panel according to a preset path;
a second acquisition unit configured to acquire the shooting data generated by the shooting device;
and the generating unit is used for integrating the shooting data through a preset algorithm so as to generate pixel brightness data of the target display panel.
9. The apparatus of claim 8, wherein the display panel specification information comprises display panel resolution information and display panel size information.
10. The apparatus according to claim 9, wherein the second determining unit is specifically:
and determining the shooting flow information of the shooting device according to the shooting specification information of the shooting device, the display panel resolution information of the display panel and the size information of the display panel.
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