CN107464513B - Automatic picture flicker detection system and method for display panel - Google Patents
Automatic picture flicker detection system and method for display panel Download PDFInfo
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N2021/9513—Liquid crystal panels
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Abstract
The invention provides a picture flicker automatic detection system and a detection method of a display panel, wherein the system comprises a first carrying platform, one side of a plane where the first carrying platform is positioned in a first direction is opposite to a first lighting mechanism, and the first lighting mechanism is used for testing a printed circuit board of the display panel; one end of the first carrier in the second direction of the plane is opposite to the first panel positioning mechanism; a feeding arm corresponds to the first carrying platform in the vertical direction, a flicker value regulator is arranged at the center point of the feeding end of the feeding arm, and the center point of the feeding end of the feeding arm is aligned with the center of a panel of a display panel fixed on the first carrying platform; the flicker value regulator is used for regulating the common electrode voltage of the display panel so as to eliminate the picture flicker phenomenon of the display panel, and the flicker picture regulation test can be directly carried out from the center of the panel of the display panel through the detection system at first, so that the regulation time is shortened.
Description
Technical Field
The invention relates to the field of liquid crystal display panels, in particular to an automatic detection system and method for picture flicker of a display panel.
Background
V of liquid crystal display panel com The voltage (common electrode voltage) is the reference voltage of the liquid crystal AC drive, V com It must be adjustable in circuit design because in module engineering, fine tuning is generally required according to the flicker state of the display. If V in modular engineering com The voltage value is outside the specified voltage, the display panel will have Flicker phenomenon (picture flickering phenomenon), even after aging at high temperature, the afterimage problem will occur,at this time, the PCB substrate (Printed Circuit Board ) of the display panel must be replaced.
The conventional detection equipment for the PCB (Printed Circuit Board ) of the display panel is to perform panel lighting test by manually pulling out the connecting wires, and the flicker processing link of the display panel is to manually measure and adjust the V by leaning the sensor on the panel com Voltage, the human cost is higher.
In the present apparatus capable of automatically detecting the flicker of the display panel, the flicker value regulator is correspondingly disposed on the upper side (usually disposed on the upper right corner) of the stage of the detecting apparatus (stage for fixing the display panel), but the measurement of the flicker value regulator needs to measure the center point of the panel of the display panel, and the verification of the measurement is based on the center of the panel. In addition, if when testing the display panel of different models, still consider because the size of different model display panels is different, the staff need adjust the extension length repeatedly and just can test different model display panels one by one for work efficiency becomes very low, and the human cost is still higher.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide an automatic picture flicker detection system and method for a display panel, and aims to solve the problems that the picture flicker detection of the display panel is not automatic enough and the working efficiency is low in the current module engineering.
In order to achieve the above object, the present invention provides an automatic detection system for flicker of a display panel, the system comprising:
the first loading platform is arranged on one side of the plane in the first direction, opposite to the first lighting mechanism, and the first lighting mechanism is used for testing the printed circuit board of the display panel;
one end of the first carrier in the second direction of the plane is opposite to a first panel positioning mechanism, and the first panel positioning mechanism is used for fixing the display panel;
the upper part of the vertical direction of the plane where the first carrying platform is located is opposite to a feeding arm, a flicker value regulator is arranged at the center point of the feeding end of the feeding arm, and the flicker value regulator is aligned with the center of a panel of a display panel fixed on the first carrying platform.
In an embodiment, the system further comprises a second stage, the second stage and the first stage being arranged side by side along the planar first direction, the first stage further transferring the display panel to the second stage; the second carrying platform is opposite to the second lighting mechanism at one side of the plane in the first direction; one end of the second carrying platform in the second direction of the plane is opposite to the second panel positioning mechanism.
In an embodiment, the first stage has a rotary pneumatic cylinder, and the first stage rotates the display panel with the flicker phenomenon removed to the second stage through the rotary pneumatic cylinder.
In an embodiment, the lighting mechanism corresponding to the second stage is provided with an optical camera, and the optical camera is used for acquiring the defect image of the display panel.
In addition, the invention also provides a detection method of the automatic picture flicker detection system based on the display panel, wherein the automatic picture flicker detection system based on the display panel comprises any one of the detection systems, and the detection method comprises the following steps of:
when a feeding arm places a display panel on a first carrier, a first lighting mechanism tests a printed circuit board of the display panel and transmits test signals to a flicker value regulator, wherein the first lighting mechanism corresponds to the first carrier, and the flicker value regulator is arranged in the center point of a feeding end of the feeding arm;
and after receiving the test signal, the flicker value regulator regulates the common electrode voltage at the center of the panel of the display panel according to the test signal.
Optionally, before the first lighting mechanism tests the printed circuit board of the display panel, the method further includes:
the first panel positioning mechanism fixes the display panel when the feeding arm places the display panel on the first carrier, and the first panel positioning mechanism corresponds to the first carrier.
Optionally, the flicker value adjuster adjusts the common electrode voltage at the panel center of the display panel according to the test signal, and specifically includes:
the flicker value regulator obtains an initial flicker value of the display panel according to the test signal;
and when the initial flicker value meets a preset condition, adjusting the voltage of the public electrode at the center of the panel.
Optionally, after the adjusting the common electrode voltage of the panel center of the display panel according to the test signal, the method further includes:
the first carrying platform rotates the display panel to the second carrying platform;
a second lighting mechanism corresponding to the second carrying platform tests the printed circuit board of the display panel and sends out a picture signal to the optical camera;
the optical camera receives the picture signal and acquires a defect image of the display panel according to the picture signal.
According to the automatic picture flicker detection system and method for the display panel, a feeding arm is corresponding to the first carrier in the vertical direction, the center point of the feeding end of the feeding arm is provided with a flicker value regulator, the flicker value regulator is aligned with the panel center of the display panel fixed on the first carrier, when the feeding arm places the display panel on the first carrier, the display panel is fixed by a first panel positioning mechanism corresponding to a first panel positioning mechanism, and at the moment, the flicker value regulator regulates the common electrode voltage in the panel center of the display panel according to a test signal so as to eliminate the picture flicker phenomenon of the display panel. The flicker picture adjustment test can be directly carried out from the center of the panel of the display panel through the detection system at first, so that the adjustment time is shortened, and the phenomenon that other mechanisms block or interfere with the flicker value regulator when the first carrying platform moves the display panel can be avoided.
Drawings
Fig. 1 is a schematic diagram of an exemplary automatic PCB inspection apparatus;
FIG. 2 is a schematic diagram illustrating an embodiment of an automatic detecting system for flicker of a display panel according to the present invention;
FIG. 3 is a schematic diagram illustrating a structure of an automatic detecting system for flicker of a display panel according to another embodiment of the present invention;
fig. 4 is a flowchart of a first embodiment of a detection method of an automatic detection system for flicker of a display panel according to the present invention.
Fig. 5 is a flowchart of a second embodiment of a detection method of an automatic detection system for flicker of a display panel according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the conventional PCB automatic inspection apparatus, referring to fig. 1, the flicker value adjuster 200 is usually disposed at the upper corner of the side of the carrier 100 (upper right corner in fig. 1) when adjusting the flicker image of the display panel, but the measurement of the flicker value adjuster 200 needs to be performed on the panel center point of the display panel 900, and the verification of the measurement is based on the panel center. In addition, when the stage on which the current display panel is mounted rotates the current display panel to another stage for performing other testing operations, the extended portion of the extension mechanism may interfere with the corresponding lighting mechanism 400 or panel positioning mechanism 500 on the stage during rotation, which may lengthen the automatic detection time of flicker. The working efficiency becomes very low, and the labor cost is still higher.
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the present invention. Variations in the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments of the invention should not be construed as limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. Thus, the regions illustrated are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the embodiments.
In the description of the present invention, it should be understood that the terms "vertical," "lateral," "upper," "lower," "left," "right," "horizontal," "both sides," "bottom," "middle," "inner," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, unless otherwise indicated, the meaning of "plurality of" means two (two) or more than two (two).
In addition, the term "include" and any variations thereof are intended to cover a non-exclusive inclusion.
The invention provides an automatic picture flicker detection system of a display panel.
Fig. 2 is a schematic structural diagram of an automatic detecting system for flicker of a display panel according to an embodiment of the present invention, where the system includes:
a first stage 01, wherein one side of a plane in which the first stage 01 is located in a first direction is opposite to a first lighting mechanism 04, and the first lighting mechanism 04 is used for testing a printed circuit board of the display panel 09;
one end of the first carrier 01 in the second direction of the plane is opposite to the first panel positioning mechanism 05, and the first panel positioning mechanism 05 is used for fixing the display panel 09;
the upper part of the vertical direction of the first carrying platform 01 is opposite to a feeding arm 03, a flicker value regulator 02 is arranged at the center point of the feeding end of the feeding arm 03, and the flicker value regulator 02 is aligned with the panel center point of a display panel 09 fixed on the first carrying platform 01; the flicker value adjuster 02 is configured to adjust a common electrode voltage of the display panel 09 to eliminate a picture flicker phenomenon of the display panel 09.
Specifically, in this embodiment, the feeding arm 03 may take out the display panel to be detected from the belt line in the second direction of the plane, and then the feeding arm 03 places the display panel on the first carrier 01, where the first panel positioning mechanism 05 will fix the display panel; after the display panel is fixed, the first lighting mechanism 04 in the first direction of the first carrying platform 01 can displayThe printed circuit board of the display panel tests and sends a test signal to the flicker value regulator 02, wherein the flicker value regulator 02 is arranged at the center point of the feeding end of the feeding arm 03, and the center point of the feeding end of the feeding arm 03 is aligned with the center of the panel of the display panel fixed on the first carrier 01; finally, the flicker value regulator 02 obtains the current flicker state (i.e. the initial flicker value) of the display panel according to the test signal transmitted by the first lighting mechanism 04, and when the initial flicker value meets the preset condition, the flicker value regulator 02 adjusts the V in the center of the panel com Common electrode voltage until the optimal V is found com And a common electrode voltage value to eliminate the picture flicker phenomenon of the display panel 09.
The center point of the feeding end of the feeding arm is provided with a flicker value adjuster, the flicker value adjuster is aligned with the panel center of the display panel fixed on the first carrier, when the feeding arm places the display panel on the first carrier, the first panel positioning mechanism corresponding to the first panel positioning mechanism fixes the display panel, and at the moment, the flicker value adjuster can adjust the common electrode voltage of the panel center of the display panel according to a test signal so as to eliminate the picture flicker phenomenon of the display panel, so that the system can directly perform a flicker picture adjustment test from the panel center of the display panel at first, further, the adjustment time is shortened, and meanwhile, the phenomenon that other mechanisms (such as a first lighting mechanism or a second panel positioning mechanism shown in fig. 2) can be prevented from interfering with the flicker value adjuster when the first carrier moves the display panel can be avoided.
Further, referring to fig. 3, the system further includes a second stage 06, where the second stage 06 and the first stage 01 are disposed side by side along the first plane direction, and the first stage 01 further transmits the display panel 09 with the flicker phenomenon removed to the second stage 06; the second stage 06 faces the second lighting mechanism 07 on one side of the plane in the first direction; one end of the second carrier 06 in the second direction of the plane is opposite to the second panel positioning mechanism 08.
Specifically, in this embodiment, taking an example that the first stage 01 and the second stage 06 each have a rotary pneumatic cylinder, the second stage 06 is provided with an optical CCD (charge coupled device) camera, and after the display panel on the first stage 01 completes the flicker picture adjustment test, the system will notify the first stage 01 to rotate the display panel to the second stage 06; when the display panel is located on the second stage 06, the second panel positioning mechanism 08 will fix the display panel, then the second lighting mechanism 07 corresponding to the second stage 06 will test the printed circuit board of the display panel, and send out a picture signal to the optical CCD camera; the optical CCD camera receives the picture signals, and shoots and takes images of the display panel according to the picture signals so as to obtain defect images of different grades of the display panel, so that an analyst can inspect the display panel for poor phenomena including line defects, point defects, uneven display, poor gray scales and other defect grade inspections.
Different detection works are respectively carried out on the two sides of the first carrying platform and the second carrying platform, the flicker picture adjustment test of the panel is carried out on the side of the first carrying platform, and the defect inspection of the display panel is carried out on the side of the second carrying platform, so that the working time of the whole detection flow can be improved, and the working efficiency is improved.
According to the embodiment, the flicker value regulator is arranged at the center point of the feeding end of the feeding arm, so that the system can directly conduct flicker picture adjustment test from the panel center of the display panel at first, adjustment time is shortened, meanwhile, the phenomenon that other mechanisms prevent interference of the flicker value regulator when the first carrying platform rotates to the second carrying platform can be avoided, even if operators test display panels of different models, the operators do not need to adjust parameters of an inspection system back and forth, the inspection is more automatic relative to the traditional inspection equipment, labor is saved, working time is shortened, and the measurement result is more reliable.
Based on the structure of the automatic picture flicker detection system of the display panel, a first embodiment of a detection method of the automatic picture flicker detection system of the display panel is provided.
Referring to fig. 4, fig. 4 is a flowchart illustrating a first embodiment of a detection method of an automatic detecting system for flicker of a display panel according to the present invention.
In this embodiment, the detection method includes the following steps:
s10: when a feeding arm places a display panel on a first carrier, a first lighting mechanism tests a printed circuit board of the display panel and transmits test signals to a flicker value regulator, wherein the first lighting mechanism corresponds to the first carrier, and the flicker value regulator is arranged in the center point of a feeding end of the feeding arm;
s20: and after receiving the test signal, the flicker value regulator regulates the common electrode voltage at the center of the panel of the display panel according to the test signal so as to eliminate the picture flicker phenomenon of the display panel.
Specifically, referring to fig. 2, in this embodiment, the feeding arm 03 may take out the display panel to be detected from the belt line in the second direction, and then the feeding arm 03 places the display panel on the first carrier 01, where the first panel positioning mechanism 05 may fix the display panel; after the display panel is fixed, the first lighting mechanism 04 in the first direction of the first carrying platform 01 tests the printed circuit board of the display panel and sends a test signal to the flicker value regulator 02, wherein the flicker value regulator 02 is arranged at the center point of the feeding end of the feeding arm 03, and the center point of the feeding end of the feeding arm 03 is aligned with the center of the panel of the display panel fixed on the first carrying platform 01; finally, the flicker value regulator 02 obtains the current flicker state (i.e. the initial flicker value) of the display panel according to the test signal transmitted by the first lighting mechanism 04, and when the initial flicker value meets the preset condition, the flicker value regulator 02 adjusts the V in the center of the panel com Common electrode voltage until the optimal V is found com And a common electrode voltage value to eliminate the picture flicker phenomenon of the display panel 09.
In this embodiment, the center point of the feeding end of the feeding arm is aligned with the center of the panel of the display panel fixed on the first carrier, and the flicker value regulator is disposed at the center point of the feeding end of the feeding arm, so that the system can directly perform flicker picture adjustment test from the center of the panel of the display panel at first, thereby shortening adjustment time, and simultaneously avoiding the phenomenon that other mechanisms (such as the first lighting mechanism or the second panel positioning mechanism in fig. 2) prevent interference of the flicker value regulator when the first carrier moves the display panel.
Referring to fig. 5, fig. 5 is a flowchart illustrating a second embodiment of a detection method of an automatic detecting system for flicker of a display panel according to the present invention. Based on the first embodiment of the above method, fig. 5 exemplifies an embodiment based on that shown in fig. 4.
In this embodiment, after the adjusting the common electrode voltage at the panel center of the display panel according to the test signal, the method further includes:
s30: the first carrying platform rotates the display panel to the second carrying platform;
s40: a second lighting mechanism corresponding to the second carrying platform tests the printed circuit board of the display panel and sends out a picture signal to the optical camera;
s50: the optical camera receives the picture signal and acquires a defect image of the display panel according to the picture signal.
Specifically, in this embodiment, with reference to fig. 4, the first stage 01 and the second stage 06 each have a rotary pneumatic cylinder, and after the display panel on the first stage 01 completes the flicker adjustment test, the system will notify the first stage 01 to rotate the display panel to the second stage 06; when the display panel is located on the second stage 06, the second panel positioning mechanism 08 will fix the display panel, then the second lighting mechanism 07 corresponding to the second stage 06 will test the printed circuit board of the display panel, and send out a picture signal to the optical CCD camera; the optical CCD camera receives the picture signals, and shoots and takes images of the display panel according to the picture signals so as to obtain defect images of different grades of the display panel, so that an analyst can inspect the display panel for poor phenomena including line defects, point defects, uneven display, poor gray scales and other defect grade inspections.
Different detection works are respectively carried out on the two sides of the first carrying platform and the second carrying platform, the flicker picture adjustment test of the panel is carried out on the side of the first carrying platform, and the defect inspection of the display panel is carried out on the side of the second carrying platform, so that the working time of the whole detection flow can be improved, and the working efficiency is improved.
According to the embodiment, the flicker value regulator is arranged at the center point of the feeding end of the feeding arm, so that the system can directly conduct flicker picture adjustment test from the panel center of the display panel at first, adjustment time is shortened, meanwhile, the phenomenon that other mechanisms prevent interference of the flicker value regulator when the first carrying platform rotates to the second carrying platform can be avoided, even if operators test display panels of different models, the operators do not need to adjust parameters of an inspection system back and forth, the inspection is more automatic relative to the traditional inspection equipment, labor is saved, working time is shortened, and the measurement result is more reliable.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. A picture flicker automatic detection system for a display panel, the system comprising:
the first loading platform is arranged on one side of the plane in the first direction, opposite to the first lighting mechanism, and the first lighting mechanism is used for testing the printed circuit board of the display panel;
one end of the first carrier in the second direction of the plane is opposite to a first panel positioning mechanism, and the first panel positioning mechanism is used for fixing the display panel;
the upper part of the vertical direction of the plane where the first carrying platform is located is opposite to a feeding arm, a flicker value regulator is arranged at the center point of the feeding end of the feeding arm, the flicker value regulator is aligned with the center of a panel of a display panel fixed on the first carrying platform, and the flicker value regulator is used for acquiring the current flicker state of the display panel according to a test signal transmitted by the first lighting mechanism and regulating the common electrode voltage at the center of the display panel according to the current flicker state of the display panel.
2. The system of claim 1, further comprising a second stage, the second stage and the first stage being disposed side-by-side along the planar first direction, the first stage further transferring the display panel to the second stage; the second carrying platform is opposite to the second lighting mechanism at one side of the plane in the first direction; one end of the second carrying platform in the second direction of the plane is opposite to the second panel positioning mechanism.
3. The system of claim 2, wherein the first stage has a rotary pneumatic cylinder by which the first stage rotates the display panel from which the flicker phenomenon of the screen is eliminated to the second stage.
4. The system of claim 3, wherein a second lighting mechanism corresponding to the second stage is provided with an optical camera for acquiring a defective image of the display panel.
5. A detection method of a display panel-based screen flicker automatic detection system including the detection system according to any one of claims 1 to 4, the detection method comprising the steps of:
when a feeding arm places a display panel on a first carrier, a first lighting mechanism tests a printed circuit board of the display panel and transmits test signals to a flicker value regulator, wherein the first lighting mechanism corresponds to the first carrier, and the flicker value regulator is arranged in the center point of a feeding end of the feeding arm;
and after receiving the test signal, the flicker value regulator regulates the common electrode voltage at the center of the panel of the display panel according to the test signal.
6. The method of claim 5, wherein prior to the first lighting mechanism testing the printed circuit board of the display panel, the method further comprises:
the first panel positioning mechanism fixes the display panel when the feeding arm places the display panel on the first carrier, and the first panel positioning mechanism corresponds to the first carrier.
7. The method of claim 5, wherein the flicker value adjuster adjusts the common electrode voltage of the panel center of the display panel according to the test signal, specifically comprising:
the flicker value regulator obtains an initial flicker value of the display panel according to the test signal;
and when the initial flicker value meets a preset condition, adjusting the voltage of the public electrode at the center of the panel.
8. The method of claim 5 or 6, wherein after the adjusting the common electrode voltage of the panel center of the display panel according to the test signal, the method further comprises:
the first carrying platform rotates the display panel to a second carrying platform;
the second lighting mechanism corresponding to the second carrying platform tests the printed circuit board of the display panel and sends out a picture signal to the optical camera;
the optical camera receives the picture signal and acquires a defect image of the display panel according to the picture signal.
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