CN107422501B - Method for acquiring display image of liquid crystal mother board - Google Patents
Method for acquiring display image of liquid crystal mother board Download PDFInfo
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- CN107422501B CN107422501B CN201710773059.8A CN201710773059A CN107422501B CN 107422501 B CN107422501 B CN 107422501B CN 201710773059 A CN201710773059 A CN 201710773059A CN 107422501 B CN107422501 B CN 107422501B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
Abstract
The invention provides a method for acquiring a display image of a liquid crystal mother board. The method comprises the steps of providing a liquid crystal mother board display image acquisition device and a liquid crystal mother board, acquiring a display image of the liquid crystal mother board by using a CCD camera after the liquid crystal mother board is lightened, simultaneously measuring the distance between the CCD camera and the liquid crystal mother board in real time by a distance measuring device and transmitting the distance to a processing control device, and correspondingly controlling a driving device to drive the CCD camera to move close to or far away from the liquid crystal mother board when the distance between the CCD camera and the liquid crystal mother board is larger than or smaller than a standard distance by the processing control device, so that the distance between the CCD camera and the liquid crystal mother board is kept as the standard distance, the focusing speed can be effectively improved, and the definition.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a method for acquiring a display image of a liquid crystal mother board.
Background
With the development of Display technology, flat panel Display devices such as Liquid Crystal Displays (LCDs) have advantages of high image quality, power saving, thin body, and wide application range, and thus are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and become the mainstream of Display devices.
In the manufacturing process of the liquid crystal display panel at present, a plurality of liquid crystal display panels are obtained by cutting a whole liquid crystal mother board. In the case of applying a voltage to the liquid crystal mother panel, monomers in the liquid crystal layer of the liquid crystal mother panel are induced to react by Ultraviolet (UV) light irradiation, thereby achieving the purpose of liquid crystal alignment.
At present, in order to ensure a good HVA photo-alignment effect of a liquid crystal mother panel, after HVA photo-alignment is performed on the liquid crystal mother panel, a liquid crystal alignment inspection machine is further required to detect the alignment effect, and the specific process is as follows: the method comprises the steps of putting a liquid crystal mother board after alignment into a shell of a liquid crystal alignment inspection machine, applying a set voltage to the liquid crystal mother board to enable the liquid crystal mother board to be lightened, then obtaining a display image of the liquid crystal mother board at the moment through a charge-coupled device (CCD) camera in the liquid crystal alignment inspection machine, transmitting the display image to a host of the liquid crystal alignment inspection machine, and comparing the display image with a preset image corresponding to the set voltage through the host to judge whether the alignment of the liquid crystal mother board is good or not.
In the prior art, in order to obtain the clearest display image to better detect the alignment effect of the liquid crystal mother board, the liquid crystal mother board needs to be focused by the CCD camera, a software focusing mode is usually adopted, that is, the display image of the liquid crystal mother board is shot by the CCD camera in real time and transmitted to the host, the host analyzes the definition of the display image, when the definition of the display image does not reach a preset definition, the motor connected with the CCD camera is controlled to drive the CCD camera to move so as to adjust the distance between the CCD camera and the liquid crystal mother board, until the definition of the display image of the liquid crystal mother board shot by the CCD camera reaches the preset definition, and the focusing operation is completed.
At present, as the area of the liquid crystal display panel is continuously increased and the thickness of the liquid crystal display panel is continuously reduced, the liquid crystal mother board is also developed towards a larger and thinner direction, so that after the liquid crystal mother board is placed into a shell of a liquid crystal alignment inspection machine during alignment inspection, under the condition that the supporting position below the liquid crystal mother board is not changed, the bending of the liquid crystal mother board is more and more serious, the distance between the liquid crystal mother board and a CCD camera is changed due to the bending of the liquid crystal mother board, the CCD camera is defocused, the definition of a display image shot by the CCD camera is reduced, at this time, the operation of soft body focusing needs to be repeatedly carried out, and the focusing speed is slower.
Disclosure of Invention
The invention aims to provide a method for acquiring a display image of a liquid crystal mother board, which is simple to operate, high in focusing speed and high in definition of the acquired display image.
In order to achieve the above object, the present invention provides a method for obtaining a display image of a liquid crystal mother panel, comprising:
providing a liquid crystal mother board display image acquisition device and a liquid crystal mother board;
the device for acquiring the display image of the liquid crystal display mother board comprises a CCD camera, a driving device connected with the CCD camera, a processing control device connected with the driving device and a distance measuring device connected with the processing control device; the liquid crystal mother board is arranged below the CCD camera;
lighting the liquid crystal mother board;
acquiring a standard distance between a CCD camera and a liquid crystal mother board, and storing the standard distance in a processing control device; the standard distance is the distance between the CCD camera and the liquid crystal mother board when the CCD camera acquires a display image at a preset position on the liquid crystal mother board and the definition of the display image at the preset position is a preset definition;
the CCD camera obtains a display image of the liquid crystal mother board, the distance measuring device measures the distance between the CCD camera and the liquid crystal mother board and transmits the distance to the processing control device, and the processing control device correspondingly controls the driving device to drive the CCD camera to move close to or far away from the liquid crystal mother board when the distance between the CCD camera and the liquid crystal mother board is larger than or smaller than a standard distance, so that the distance between the CCD camera and the liquid crystal mother board is kept as the standard distance.
The specific process of acquiring the standard distance between the CCD camera and the liquid crystal mother board and storing the standard distance in the processing control device comprises the following steps: the CCD camera acquires a display image at a preset position on the liquid crystal mother board and transmits the display image to the processing control device, the processing control device controls the driving device to drive the CCD camera to move until the definition of the display image at the preset position is larger than or equal to a preset definition according to the definition of the display image at the preset position, the distance measuring device measures the distance between the CCD camera and the liquid crystal mother board at the moment and transmits the distance to the processing control device, and the processing control device stores the distance between the CCD camera and the liquid crystal mother board at the moment as a standard distance between the CCD camera and the liquid crystal mother board.
The driving device is a motor.
The processing control device is a programmable logic controller.
The distance measuring device is arranged at one end of the CCD camera close to the liquid crystal mother board.
The distance measuring device comprises a laser source and a laser sensor which are respectively arranged at two sides of one end, close to the liquid crystal mother board, of the CCD camera, and the laser sensor is connected with the processing control device.
The liquid crystal mother board is a liquid crystal mother board after HVA configuration.
The display image of the liquid crystal mother board is used for analyzing the alignment effect of the liquid crystal mother board.
The invention has the beneficial effects that: the invention provides a liquid crystal mother board display image acquisition method, which comprises the steps of providing a liquid crystal mother board display image acquisition device and a liquid crystal mother board, utilizing a CCD (charge coupled device) camera to acquire a display image of the liquid crystal mother board after the liquid crystal mother board is lightened, simultaneously measuring the distance between the CCD camera and the liquid crystal mother board in real time by a distance measuring device and transmitting the distance to a processing control device, and correspondingly controlling a driving device to drive the CCD camera to move close to or far away from the liquid crystal mother board when the distance between the CCD camera and the liquid crystal mother board is larger than or smaller than a standard distance by the processing control device, so that the distance between the CCD camera and the liquid crystal mother board is kept as the standard distance, the focusing speed can be effectively.
Drawings
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a flow chart of a method for acquiring a display image of a liquid crystal mother panel according to the present invention;
fig. 2 is a schematic diagram of step S1 of the method for acquiring a display image of a liquid crystal mother panel according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 1, the present invention provides a method for obtaining a display image of a liquid crystal mother panel, comprising the following steps:
step S1, please refer to fig. 2, providing a liquid crystal mother board display image capturing device and a liquid crystal mother board 500;
the device for acquiring the display image of the liquid crystal display mother board comprises a CCD camera 100, a driving device 200 connected with the CCD camera 100, a processing control device 300 connected with the driving device 200 and a distance measuring device 400 connected with the processing control device 300; the liquid crystal mother substrate 500 is disposed under the CCD camera 100.
Specifically, the lcd mother panel display image acquiring device is disposed inside a housing of the conventional lcd alignment checking machine, and correspondingly, the lcd mother panel 500 is also disposed inside the housing of the conventional lcd alignment checking machine.
Specifically, the liquid crystal mother substrate 500 is a liquid crystal mother substrate after HVA configuration.
Specifically, the driving device 200 is a motor.
Specifically, the process control device 300 is a Programmable Logic Controller (PLC). The programmable logic controller employs a type of programmable memory that can be used to internally store programs, execute user-oriented instructions such as logic operations, sequence control, timing, counting, and arithmetic operations, and can control various types of machinery or manufacturing processes via digital or analog input/output.
Specifically, the distance measuring device 400 is disposed at an end of the CCD camera 100 close to the liquid crystal mother board 500, and the driving device 200 is connected to an end of the CCD camera 100 far from the liquid crystal mother board 500.
Preferably, the distance measuring device 400 is a laser (laser) distance measuring device, the distance measuring device 400 includes a laser source 410 and a laser sensor 420 respectively disposed at two sides of one end of the CCD camera 100 close to the liquid crystal mother board 500, and the laser sensor 420 is connected to the processing control device 300.
Step S2, the liquid crystal mother panel 500 is lighted.
Specifically, when the lcd mother panel display image capture device and the lcd mother panel 500 are disposed inside the housing of the conventional lcd alignment inspection machine, the step S2 lights the lcd mother panel 500 by applying a set voltage to the lcd mother panel by the lcd alignment inspection machine.
Step S3, acquiring a standard distance between the CCD camera 100 and the liquid crystal mother board 500, and storing the standard distance in the processing control device 300; the standard distance is a distance between the CCD camera 100 and the liquid crystal mother panel 500 when the CCD camera 100 acquires a display image of a predetermined position on the liquid crystal mother panel 500 and the definition of the display image of the predetermined position is a predetermined definition.
Specifically, the specific process of step S3 is as follows: the CCD camera 100 acquires a display image at a preset position on the liquid crystal mother board 500 and transmits the display image to the processing control device 300, the processing control device 300 controls the driving device 200 to drive the CCD camera 100 to move until the definition of the display image at the preset position is greater than or equal to a preset definition according to the definition of the display image at the preset position, the distance measuring device 400 measures the distance between the CCD camera 100 and the liquid crystal mother board 500 at the moment and transmits the distance to the processing control device 300, and the processing control device 300 stores the distance between the CCD camera 100 and the liquid crystal mother board 500 at the moment as a standard distance between the CCD camera 100 and the liquid crystal mother board 500.
Step S4, the CCD camera 100 acquires the display image of the liquid crystal mother board 500, and the distance measuring device 400 measures the distance between the CCD camera 100 and the liquid crystal mother board 500 in real time and transmits the measured distance to the processing control device 300, and the processing control device 300 correspondingly controls the driving device 200 to drive the CCD camera 100 to move closer to or away from the liquid crystal mother board 500 when the distance between the CCD camera 100 and the liquid crystal mother board 500 is greater than or less than the standard distance, so that the distance between the CCD camera 100 and the liquid crystal mother board 500 is maintained at the standard distance.
Specifically, in the steps S3 and S4, the distance measuring device 400 emits laser to the liquid crystal mother board 500 through the laser source 410, and receives the laser reflected by the liquid crystal mother board 500 through the laser sensor 420, so as to obtain the time from the laser source 410 emitting the laser to the laser being received by the laser sensor 420, and in combination with the propagation speed of the laser, the distance between one end of the CCD camera 100 where the laser source 410 and the laser sensor 420 are located, which is close to the liquid crystal mother board 500, and the liquid crystal mother board 500, that is, the distance between the CCD camera 100 and the liquid crystal mother board 500, can be obtained.
Specifically, the display image of the liquid crystal mother substrate 500 is used to analyze the alignment effect of the liquid crystal mother substrate 500. Specifically, the alignment effect of the liquid crystal mother panel 500 is analyzed by comparing the display image of the liquid crystal mother panel 500 with a preset frame corresponding to a set voltage.
It should be noted that, in the method for acquiring a display image of a liquid crystal mother panel according to the present invention, while the CCD camera 100 acquires a display image of the liquid crystal mother panel 500, the distance between the CCD camera 100 and the liquid crystal mother panel 500 is measured in real time by the distance measuring device 400 and transmitted to the processing control device 300, when the distance between the CCD camera 100 and the liquid crystal mother panel 500 is greater than the standard distance, the processing control device 300 controls the driving device 200 to drive the CCD camera 100 to approach the liquid crystal mother panel 500 until the distance between the CCD camera 100 and the liquid crystal mother panel 500 is equal to the standard distance, and when the distance between the CCD camera 100 and the liquid crystal mother panel 500 is less than the standard distance, the processing control device 300 controls the driving device 200 to drive the CCD camera 100 to move away from the liquid crystal mother panel 500 until the distance between the CCD camera 100 and the liquid crystal mother panel 500 is equal to the standard distance, so that the distance between, the standard distance is a distance between the CCD camera 100 and the liquid crystal mother board 500 when the definition of the display image at a preset position on the liquid crystal mother board 500 acquired by the CCD camera 100 is a preset definition, and when the CCD camera 100 and the liquid crystal mother board 500 are always kept at the standard distance, the display image of the liquid crystal display mother board 500 acquired by the CCD camera 100 is clear, and the problem of the decrease of the definition of the acquired image caused by the defocusing of the CCD camera 100 is solved, so that when the display image of the liquid crystal mother board 500 is applied to the analysis of the alignment effect of the liquid crystal mother board 500, the alignment effect of the liquid crystal mother board 500 can be more accurately judged, and compared with the prior art, the focusing speed of the invention is faster through a repeated soft body focusing method.
In summary, the method for acquiring a display image of a liquid crystal mother board according to the present invention provides a liquid crystal mother board display image acquiring device and a liquid crystal mother board, and after the liquid crystal mother board is lighted, a CCD camera is used to acquire a display image of the liquid crystal mother board, and meanwhile, a distance measuring device measures a distance between the CCD camera and the liquid crystal mother board in real time and transmits the distance to a processing control device, and the processing control device correspondingly controls a driving device to drive the CCD camera to move closer to or away from the liquid crystal mother board when the distance between the CCD camera and the liquid crystal mother board is greater than or less than a standard distance, so that the distance between the CCD camera and the liquid crystal mother board is maintained at the standard distance, which can effectively increase a.
As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.
Claims (3)
1. A method for acquiring a display image of a liquid crystal mother board is characterized by comprising the following steps:
providing a liquid crystal mother board display image acquisition device and a liquid crystal mother board (500);
the liquid crystal mother board display image acquisition device comprises a CCD camera (100), a driving device (200) connected with the CCD camera (100), a processing control device (300) connected with the driving device (200), and a distance measuring device (400) connected with the processing control device (300); the liquid crystal mother board (500) is arranged below the CCD camera (100);
lighting a liquid crystal mother board (500);
acquiring a standard distance between a CCD camera (100) and a liquid crystal mother board (500), and storing the standard distance in a processing control device (300); the standard distance is the distance between the CCD camera (100) and the liquid crystal mother board (500) when the CCD camera (100) acquires a display image at a preset position on the liquid crystal mother board (500) and the definition of the display image at the preset position is a preset definition;
the CCD camera (100) acquires a display image of the liquid crystal mother board (500), the distance measuring device (400) measures the distance between the CCD camera (100) and the liquid crystal mother board (500) and transmits the distance to the processing control device (300), and the processing control device (300) correspondingly controls the driving device (200) to drive the CCD camera (100) to move close to or far away from the liquid crystal mother board (500) when the distance between the CCD camera (100) and the liquid crystal mother board (500) is larger than or smaller than a standard distance, so that the distance between the CCD camera (100) and the liquid crystal mother board (500) is kept as the standard distance;
the distance measuring device (400) is arranged at one end, close to the liquid crystal mother board (500), of the CCD camera (100);
the distance measuring device (400) comprises laser sources (410) and laser sensors (420) which are respectively arranged on two sides of one end, close to the liquid crystal mother board (500), of the CCD camera (100), and the laser sensors (420) are connected with the processing control device (300);
the specific process of acquiring the standard distance between the CCD camera (100) and the liquid crystal mother board (500) and storing the standard distance in the processing control device (300) comprises the following steps: the CCD camera (100) acquires a display image at a preset position on the liquid crystal mother board (500) and transmits the display image to the processing control device (300), the processing control device (300) controls the driving device (200) to drive the CCD camera (100) to move until the definition of the display image at the preset position is larger than or equal to a preset definition according to the definition of the display image at the preset position, the distance measuring device (400) measures the distance between the CCD camera (100) and the liquid crystal mother board (500) at the moment and transmits the distance to the processing control device (300), and the processing control device (300) stores the distance between the CCD camera (100) and the liquid crystal mother board (500) at the moment as a standard distance between the CCD camera (100) and the liquid crystal mother board (500);
the liquid crystal mother board (500) is a liquid crystal mother board after HVA alignment;
the display image of the liquid crystal mother board (500) is used for analyzing the alignment effect of the liquid crystal mother board (500).
2. The method for acquiring display images of a liquid crystal mother panel according to claim 1, wherein the driving device (200) is a motor.
3. The method for acquiring display images of a liquid crystal mother panel according to claim 1, wherein the processing control device (300) is a programmable logic controller.
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| CN110018171A (en) * | 2019-04-23 | 2019-07-16 | 深圳市华星光电半导体显示技术有限公司 | Substrate detection apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750714A (en) * | 2008-12-19 | 2010-06-23 | Ap系统股份有限公司 | Vision system for substrate alignment apparatus and method for focusing the same |
| CN101782369A (en) * | 2009-01-16 | 2010-07-21 | 鸿富锦精密工业（深圳）有限公司 | Image measurement focusing system and method |
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| JP3419870B2 (en) * | 1994-01-11 | 2003-06-23 | 芝浦メカトロニクス株式会社 | Calibration method of optical system for recognition of visual recognition device and visual recognition device using the method |
| JP2000088760A (en) * | 1998-09-16 | 2000-03-31 | Sharp Corp | Work-inspecting device |
| CN103376615A (en) * | 2012-04-24 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Automatic focusing device and automatic focusing method |
| TWI585394B (en) * | 2015-12-09 | 2017-06-01 | 由田新技股份有限公司 | Automatic focusing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101750714A (en) * | 2008-12-19 | 2010-06-23 | Ap系统股份有限公司 | Vision system for substrate alignment apparatus and method for focusing the same |
| CN101782369A (en) * | 2009-01-16 | 2010-07-21 | 鸿富锦精密工业（深圳）有限公司 | Image measurement focusing system and method |
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