CN114999386A - External optical compensation method and device of display module - Google Patents

External optical compensation method and device of display module Download PDF

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Publication number
CN114999386A
CN114999386A CN202210715406.2A CN202210715406A CN114999386A CN 114999386 A CN114999386 A CN 114999386A CN 202210715406 A CN202210715406 A CN 202210715406A CN 114999386 A CN114999386 A CN 114999386A
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China
Prior art keywords
display module
optical compensation
external optical
controller
display
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Pending
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CN202210715406.2A
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Chinese (zh)
Inventor
龙万平
秦凯
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Huaxingyuanchuang Chengdu Technology Co ltd
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Huaxingyuanchuang Chengdu Technology Co ltd
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Priority to CN202210715406.2A priority Critical patent/CN114999386A/en
Publication of CN114999386A publication Critical patent/CN114999386A/en
Pending legal-status Critical Current

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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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The embodiment of the invention discloses an external optical compensation method and device of a display module, and in a specific example, the method comprises the following steps: s10, carrying the display module to an acquisition station; s20, controlling the display module to display a test picture and collecting an image containing the test picture; and S30, carrying the display module to a blanking station, and generating external optical compensation data according to the image containing the test picture and burning the external optical compensation data to the display module in the process of carrying the display module to the blanking station. The application provides an outside optical compensation method of display module assembly, the time that utilizes display module assembly transport generates outside optical compensation data and burns it to display module assembly has saved the process of the outside optical compensation of display module assembly, has improved production test efficiency.

Description

External optical compensation method and device of display module
Technical Field
The present invention relates to the field of external optical compensation. And more particularly, to an external optical compensation method and apparatus for a display module.
Background
In a conventional process of fabricating an OLED display panel, due to impure materials and production processes, non-uniformity exists in electrical parameters of different led units, which may cause non-uniformity of luminance of the OLED display panel during displaying. Such inhomogeneities are referred to in the industry as mura. External optical compensation (Demura) is commonly used to solve the problem of non-uniformity in panel displays. How to improve the efficiency of external optical compensation in the production line and improve the compatibility of an external optical compensation device is a problem which needs to be solved urgently at present.
Disclosure of Invention
The present invention is directed to a method and an apparatus for external optical compensation of a display module, so as to solve at least one of the problems of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an external optical compensation method of a display module, which comprises the following steps:
s10, carrying the display module to a collection station;
s20, controlling the display module to display a test picture and collecting an image containing the test picture;
and S30, carrying the display module to a blanking station, and generating external optical compensation data according to the image containing the test picture and burning the external optical compensation data to the display module in the process of carrying the display module to the blanking station.
Optionally, the generating external optical compensation data according to the image containing the test picture includes: calling a preprocessing algorithm in a dll mode to preprocess the image containing the test picture so as to restore the display data of the display module;
and carrying out post-processing on the display data to obtain external optical compensation data.
Optionally, the preprocessing includes positioning, correcting, and dust filtering the image including the test frame to restore the display data of the display module.
Optionally, the method further comprises: and in the process of conveying the display module to the blanking station, sequentially conveying at least one other display module to the collecting station and executing steps S20-S30.
Optionally, a file format of the external optical compensation data is a bin file.
A second aspect of the present invention provides an external optical compensation device for a display module, the device comprising: the device comprises a controller, a carrying mechanism and image acquisition equipment;
the controller is used for controlling the carrying mechanism to carry the display module to the collecting station, controlling the display module located at the collecting station to display a test picture, controlling the image collecting equipment to collect an image containing the test picture, controlling the carrying mechanism to carry the display module to the blanking station after the collection is completed, and generating external optical compensation data according to the image containing the test picture and burning the external optical compensation data to the display module in the process of carrying the display module to the blanking station.
Optionally, the controller comprises a first controller and a second controller;
the first controller is used for sending a control instruction to the carrying mechanism and sending a photographing request and a testing request to the second controller;
the second controller is used for sending an image acquisition finishing instruction and a test finishing instruction to the image acquisition device and the image acquisition equipment of the image acquisition device, and generating external optical compensation data according to an image containing a test picture.
Optionally, the apparatus further includes an inspection machine, configured to respond to an instruction of the controller, so that the display module displays a test picture, receives the external optical compensation data, and burns the external optical compensation data into the display module.
Optionally, the first controller is further configured to control the carrying mechanism to carry other display modules to the collection station after receiving the test completion instruction.
Optionally, the generating external optical compensation data according to the image containing the test picture includes: calling a preprocessing algorithm in a dll mode to preprocess the image containing the test picture, positioning and correcting the image, and filtering dust to restore the display data of the display module;
and carrying out post-processing on the display data to obtain external optical compensation data.
The invention has the following beneficial effects:
according to the external optical compensation method of the display module, the external optical compensation data are generated by utilizing the time of carrying the display module and are burnt to the display module, so that the time of external optical compensation of the display module is saved, and the production test efficiency is improved.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of an external optical compensation method provided by an embodiment.
Fig. 2 is a flowchart illustrating an external optical compensation method for a display module according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an apparatus for implementing an external optical compensation method according to an embodiment of the present invention.
Fig. 4 shows a flow chart of an external optical compensation method provided by another embodiment of the present invention.
Fig. 5 is a schematic diagram illustrating an apparatus architecture of an external optical compensation device according to an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to the following examples and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
The external optical compensation is to take a picture of the display module for displaying the test picture by using a camera, then process the acquired image to obtain compensation data, and finally burn the compensation data into the storage device of the display module, so that the display module can compensate the brightness of the pixel points or areas with mura according to the compensation data when displaying. As shown in fig. 1, which is a flow chart of an existing external optical compensation method, a display module is transported to a station 1 by a loading and unloading device, a lower computer executes a rotation of a turntable, the display module located at the station 1 is transported to a station 2 for photographing, after photographing is completed, the display module is transported to a station 3 for demura processing by an upper computer and generating a file containing external optical compensation data, after receiving test completion information fed back by the upper computer, the lower computer controls the rotation of the turntable to transport the display module to be tested to the station 4 and requests the upper computer to perform burning processing of the file, after feedback of the upper computer is completed, the lower computer executes the rotation of the turntable to transport the display module to be tested to the station 1, and the display module is transported to other flow lines by the loading and unloading device.
The inventor finds that in the external optical compensation process of the existing display module, the time required for completing each process is different, but the stations and the processes are in a one-to-one relationship, and in order to meet the beat of actual production time, when different types of products are tested, the time length of the display module located at partial stations needs to be adjusted and distributed, for example, the time required for processing partial model external optical compensation data is long, and when the situation is met, the time length of the station 3 needs to be increased; the time required for burning part of the external optical compensation data of the model into the display module is long, and the time of the working position 4 needs to be increased; and the stations are strictly independent, and the time before the operation and the blanking of the carrying mechanism is not utilized.
Based on the above findings, an embodiment of the present invention provides an external optical compensation method for a display module, as shown in fig. 2, including:
s10, carrying the display module to a collection station;
s20, controlling the display module to display a test picture and collecting an image containing the test picture;
and S30, carrying the display module to a blanking station, and generating external optical compensation data according to the image containing the test picture and burning the external optical compensation data to the display module in the process of carrying the display module to the blanking station.
According to the scheme, the external optical compensation data are generated by utilizing the time of carrying the display module and are burnt to the display module, so that the external optical compensation time is saved, and the production test efficiency is improved.
In a possible implementation manner, the generating external optical compensation data according to the image containing the test picture includes:
calling a preprocessing algorithm in a dll mode (dynamic link library) to preprocess the image containing the test picture so as to restore the display data of the display module;
post-processing the display data to obtain external optical compensation data,
wherein,
the file format of the external optical compensation data is a bin file.
In the prior art, image data is stored on a computer hard disk in a file mode, an algorithm is in an exe mode, a preprocessing algorithm is called in the exe mode to perform data preprocessing, a calling program in the mode is used for serial processing, a new file cannot be placed before the current file processing is finished, otherwise, an abnormality is caused, and accordingly demura efficiency is reduced. The time of make full use of in the display module handling has further improved production efficiency, has improved the compatibility of demura flow, has increased the continuity and has reduced the interaction between the controller.
In one embodiment, the preprocessing includes positioning, correcting and dust filtering the image containing the test frame to restore the display data of the display module.
The test picture is, for example, a single pure color picture including a red picture, a green picture, a blue picture, and a white picture or a gray scale picture.
In a specific embodiment, the external optical compensation method further includes: and in the process of conveying the display module to the blanking station, sequentially conveying at least one other display module to the collecting station and executing steps S20-S30.
The method is described below with reference to a specific application scenario, where the carrying mechanism takes a turntable as an example, as shown in fig. 3, the carrying mechanism is a schematic structural diagram of an external optical compensation line of a display module, and mainly includes a turntable, an upper/lower work station level, and a collection work station.
The display module is placed at a feeding station by the feeding and discharging device, the controller controls the turntable to rotate to convey the display module to an acquisition station and connect the display module with the inspection machine, and then the controller controls the image acquisition device to acquire images containing test pictures, wherein,
and the loading and unloading device can convey a new display module to be tested to the loading/unloading station when detecting that no display module is arranged on the loading/unloading station.
In a specific embodiment, the inspection machine is configured to control the display module to display a test picture according to an instruction of the controller.
In a possible implementation mode, the control carrying and the data generation can be started simultaneously, the display module is carried to a blanking station through a carrying mechanism after image acquisition is completed, demura processing is carried out according to an image containing a test picture in the carrying process to generate external optical compensation data, the external optical compensation data are burnt into the display module through an inspection machine, the external optical compensation data are burnt into the display module, the inspection machine is disconnected with the display module after the display module is burnt into the external optical compensation data, and the display module is carried to the blanking station through a turntable.
It should be noted that, before the external optical compensation data is input into the inspection machine, it is necessary to determine whether there is original data in the inspection machine, and if there is original data, the original data in the inspection machine is deleted to prevent the interference of the original data to demura compensation, and the display module is erased to delete the original data in the display module.
In a specific embodiment, the image capturing device is, for example, a CCD camera, and is configured to capture a test image of the display module, such as a single solid image and a gray-scale image, and the controller controls the carrying mechanism to carry away the display module located at the capturing station after the CCD camera takes a picture.
In a specific embodiment, the controller comprises a first controller and a second controller, the first controller is used for controlling the conveying mechanism to convey the display module to the image acquisition station and sending an image acquisition request to the second controller;
the second controller responds to the image acquisition request, controls the inspection machine to enable the display module to display a test picture, and controls the image acquisition equipment to acquire an image containing the test picture;
the second controller sends an image acquisition completion instruction to the first controller, and the first controller responds to the image acquisition completion instruction to control the carrying mechanism to carry the display module to a blanking position, acquire the image containing the test picture and obtain external optical compensation data according to the image;
and the checking machine records the external optical compensation data into a preset register of the display module and then is disconnected with the display module.
In a possible implementation manner, the carrying mechanism is a drawer type carrier, the display module is placed at a feeding station by a feeding and discharging device, the first controller controls the drawer type carrier to carry the display module to an image acquisition station, and sends an image acquisition request to the second controller;
and the second controller responds to the image acquisition request, controls the inspection machine to enable the display module to display a test picture, and controls the image acquisition equipment to acquire an image containing the test picture.
The second controller sends an image acquisition completion instruction to the first controller after image acquisition is completed, and the first controller responds to the image acquisition completion instruction to control the drawer type conveyor to move the display module away from the image acquisition station;
it should be noted that, the drawer type conveyer is provided with the upper and lower drawers, so that the external optical compensation of the two sets of display modules can be performed simultaneously, and the testing efficiency of the display modules is further improved.
In a specific embodiment, the generating external optical compensation data according to the image containing the test picture includes:
storing the image data containing the test picture in a memory of a second controller, and calling a preprocessing algorithm in a dll mode to preprocess the image containing the test picture so as to restore the display data of the display module;
and carrying out post-processing on the display data to obtain external optical compensation data.
In a possible implementation manner, after receiving the photographing completion instruction, the first controller controls the carrying mechanism to carry the display module to the material discharge position and carry the next display module to be measured to the acquisition station and send a photographing request to the second controller.
Compared with the prior art that the display module can be transported to the next station only after receiving the processing completion instruction of each station sent by the upper computer, the invention fully utilizes the time before the operation and the blanking of the transport mechanism, and can execute the transfer of the display module and the inspection machine connected with the display module after receiving the photographing completion instruction fed back by the upper computer, wherein the pre-blanking area is a transport line of a turntable, the demura processing and the data burning of the display module to be detected are continuously realized in the transport process, the production efficiency of a screen is further improved, the compatibility of the demura flow is improved, the continuity is increased, and the interaction between controllers is reduced.
In a specific embodiment, the first controller is, for example, a lower computer, and is in communication connection with the second controller for controlling the carrying mechanism; the second controller is, for example, an upper computer, is in communication connection with the lower computer, and is used for controlling the image acquisition equipment to photograph the display module, perform demura pre-and post-processing according to the acquired image, and control the inspection machine to perform actions such as erasing and burning on the display module; the carrying mechanism is a turntable or a manipulator and is used for carrying the display module to the fixed station according to the instruction of the lower computer, and the specific number of the carrying mechanism can be determined according to a specific scheme.
In a possible implementation manner, as shown in fig. 4, when the process is abnormal, the lower computer sends a request test signal to the upper computer after receiving a photographing completion instruction, and the upper computer responds to the request test signal to recover the subsequent process of the external optical compensation method.
It should be noted that, under normal conditions, the upper computer will start processing by itself after receiving the image containing the test picture, and the request for activation of the test signal is not required.
According to the scheme, the second controller is enabled to be recovered from the abnormal state to be normal through the test request signal sent by the first controller, so that the continuity of the method is further improved, external manpower recovery is not needed, and the failure rate of the system is reduced.
An embodiment of the present invention provides an external optical compensation device for a display module, wherein a carrying mechanism, for example, a turntable, as shown in fig. 5, includes a controller, a carrying mechanism, and an image capturing device;
the controller is used for controlling the carrying mechanism to carry the display module to the collecting station, controlling the display module located at the collecting station to display a test picture, controlling the image collecting equipment to collect an image containing the test picture, controlling the carrying mechanism to carry the display module to the blanking station after the collection is completed, and generating external optical compensation data according to the image containing the test picture and burning the external optical compensation data to the display module in the process of carrying the display module to the blanking station.
This scheme has realized outside optical compensation device's automatic control through mutually supporting of controller, transport mechanism and image acquisition unit, has realized full-automatic batched outside optical measurement, and carries the demura processing and burns the outside optical compensation data that obtains in the engineering of carrying display module to unloading station extremely display module assembly has further improved production efficiency under test.
In a specific embodiment, the controller comprises a first controller and a second controller, both communicatively coupled;
the first controller is used for sending a control instruction to the carrying mechanism and sending a photographing request and a testing request to the second controller;
the second controller is used for sending an image acquisition finishing instruction and a test finishing instruction to the image acquisition device and the image acquisition equipment of the image acquisition device, and generating external optical compensation data according to an image containing a test picture.
In a specific embodiment, the apparatus further includes an inspection machine electrically connected to the display module to control the display module to display the test picture, and further configured to receive the external optical compensation data and burn the external optical compensation data into the display module.
In a specific embodiment, the first controller is further configured to control the carrying mechanism to carry other display modules to the collection station after receiving the test completion instruction.
In a specific embodiment, the generating external optical compensation data according to the image containing the test picture includes:
calling a preprocessing algorithm in a dll mode to preprocess the image containing the test picture, positioning and correcting the image, and filtering dust to restore the display data of the display module;
and carrying out post-processing on the display data to obtain external optical compensation data.
In a specific embodiment, the carrying mechanism is in communication connection with the first controller through a wireless network, for example, and is used for receiving a control command of the first controller to carry the display module to a command position;
controller, transport mechanism and image acquisition equipment communication connection in this scheme have realized display module's outside optical compensation device's full automatization, need not to consume the manpower, have improved production efficiency.
It should be noted that the principle and the working process of the external optical compensation apparatus for a display module according to the present embodiment are similar to those of the external optical compensation method for a display module, and reference may be made to the above description for relevant points, which is not repeated herein.
In the description of the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and all embodiments cannot be exhaustive, and all obvious variations and modifications belonging to the technical scheme of the present invention are within the protection scope of the present invention.

Claims (10)

1. An external optical compensation method for a display module, comprising the steps of:
s10, carrying the display module to an acquisition station;
s20, controlling the display module to display a test picture and collecting an image containing the test picture;
and S30, carrying the display module to a blanking station, and generating external optical compensation data according to the image containing the test picture and burning the external optical compensation data to the display module in the process of carrying the display module to the blanking station.
2. The method of claim 1,
the generating external optical compensation data from the image containing the test picture comprises:
calling a preprocessing algorithm in a dll mode to preprocess the image containing the test picture so as to restore the display data of the display module;
and carrying out post-processing on the display data to obtain external optical compensation data.
3. The method of claim 2,
the pre-processing comprises the steps of positioning, correcting and filtering the image containing the test picture to restore the display data of the display module.
4. The method according to any one of claims 1 to 3,
the method further comprises the following steps: and in the process of conveying the display module to the blanking station, sequentially conveying at least one other display module to the collecting station and executing steps S20-S30.
5. The method of claim 2,
the file format of the external optical compensation data is a bin file.
6. The external optical compensation device of the display module is characterized by comprising a controller, a carrying mechanism and image acquisition equipment;
the controller is used for controlling the carrying mechanism to carry the display module to the collecting station, controlling the display module located at the collecting station to display a test picture, controlling the image collecting equipment to collect an image containing the test picture, controlling the carrying mechanism to carry the display module to the blanking station after the collection is completed, and generating external optical compensation data according to the image containing the test picture and burning the external optical compensation data to the display module in the process of carrying the display module to the blanking station.
7. The apparatus of claim 6,
the controller comprises a first controller and a second controller;
the first controller is used for sending a control instruction to the carrying mechanism and sending a photographing request and a testing request to the second controller;
the second controller is used for sending an image acquisition finishing instruction and a test finishing instruction to the image acquisition device and the image acquisition equipment of the image acquisition device, and generating external optical compensation data according to the image containing the test picture.
8. The apparatus of claim 6,
the device also comprises a checking machine which is used for responding to the instruction of the controller to enable the display module to display the test picture, receiving the external optical compensation data and burning the external optical compensation data to the display module.
9. The apparatus of claim 7,
and the first controller is also used for controlling the carrying mechanism to carry other display modules to the acquisition station after receiving the test completion instruction.
10. The apparatus of claim 6,
the generating external optical compensation data from the image containing the test picture comprises:
calling a preprocessing algorithm in a dll mode to preprocess the image containing the test picture, positioning and correcting the image, and filtering dust to restore the display data of the display module;
and carrying out post-processing on the display data to obtain external optical compensation data.
CN202210715406.2A 2022-06-23 2022-06-23 External optical compensation method and device of display module Pending CN114999386A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210715406.2A CN114999386A (en) 2022-06-23 2022-06-23 External optical compensation method and device of display module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210715406.2A CN114999386A (en) 2022-06-23 2022-06-23 External optical compensation method and device of display module

Publications (1)

Publication Number Publication Date
CN114999386A true CN114999386A (en) 2022-09-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210715406.2A Pending CN114999386A (en) 2022-06-23 2022-06-23 External optical compensation method and device of display module

Country Status (1)

Country Link
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