CN103376577A - Automatic test method and system for liquid crystal display panel with LVDS (low voltage differential signaling) interface - Google Patents
Automatic test method and system for liquid crystal display panel with LVDS (low voltage differential signaling) interface Download PDFInfo
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- CN103376577A CN103376577A CN2013102771767A CN201310277176A CN103376577A CN 103376577 A CN103376577 A CN 103376577A CN 2013102771767 A CN2013102771767 A CN 2013102771767A CN 201310277176 A CN201310277176 A CN 201310277176A CN 103376577 A CN103376577 A CN 103376577A
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Abstract
The invention discloses automatic test method and system for a liquid crystal display panel with an LVDS (low voltage differential signaling) interface. A voltage output port of an LVDS signal generator is connected to a power input port of a liquid crystal display panel to be tested and provide normal operating voltage for the liquid crystal display panel to be tested; an LVDS signal output port of the LVDS signal generator is connected to a signal input port of the liquid crystal display panel to be tested and is used for providing test signals; the LVDS signal generator is controlled to generate a display signal, and an industrial camera is used to acquire an image of the liquid crystal display panel to be tested; after the image of the liquid crystal display panel to be tested is analyzed, whether the liquid crystal display panel to be tested is qualified or not is automatically judged, and the judgment result is output to a test result output module. The method and the system have the advantages that whether the liquid crystal display panel is qualified or not is automatically tested through the LVDS interface, testing is fully automated, testing efficiency and testing accuracy are high, and production cost is lower.
Description
Technical field:
The present invention relates to the detection technique field of liquid crystal display, especially relate to a kind of automatic test approach and system of LVDS interface liquid crystal display.
Background technology:
Along with the user to the improving constantly of multimedia display product image quality, super large screen, ultra high-definition etc. from we life also more and more close to.The interface of the LCDs of each size of current main-stream is the LVDS interface; LVDS is the abbreviation of English Low-VoltageDifferentialSignaling, i.e. Low Voltage Differential Signal.LVDS has low noise because of it, low EMI, and low-power consumption, high bit rate connects the characteristics such as simple, is the main connected mode of picture signal from the signal-processing board to the display screen in the current liquid crystal TV.Each large liquid crystal panel manufacturer such as group create photoelectricity, Youda, Samsung, and Sharp Corp releases the liquid crystal panel of different size, is applied in the various multimedia display products; The LCDs of each TV producer is from the LCDs of buying separately and other accessories, the own used LCDs of televisor of producing, and the quality guarantee of newly assembling the production LCDs becomes at present that each large producer is producing this series products urgent problem in batches.Therefore be necessary to be improved.
The utility model content:
For the deficiency that prior art exists, the purpose of this invention is to provide a kind of automatic test approach of LVDS interface liquid crystal display, whether it detects LCDs automatically by the LVDS interface qualified, the full-automatic detection, detection efficiency is high, and accurately height reduces production costs.
For the deficiency that prior art exists, another object of the present invention provides a kind of Auto-Test System of LVDS interface liquid crystal display, and it realizes full-automatic the detection, and detection efficiency is high, and accurately height reduces production costs.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of automatic test approach of LVDS interface liquid crystal display may further comprise the steps,
The voltage output of LVDS signal generator accesses the power supply input port of liquid crystal display to be measured, offers the normal operating voltage of liquid crystal panel to be tested;
The LVDS signal output of LVDS signal generator is connected to the signal input of liquid crystal panel to be tested, supplies with detection signal;
Control LVDS signal generator is exported a display, gathers liquid crystal panel image to be measured by industry vidicon;
Analyze the liquid crystal panel image to be measured that gathers, whether automatic decision liquid crystal panel to be tested is qualified;
Test result is outputed to test result output module.
Further in the detecting step, by industrial computer and control analysis unit controls LVDS signal generator output ater signal; Whether after the startup industry vidicon gathers liquid crystal panel image to be measured, analyzing has bright spot to exist; Have and exceed the setting permissible range if any the bright spot signal, automatic decision is the NG screen, otherwise then automatic decision is qualified screen.
Further in the detecting step, by industrial computer and control analysis unit controls LVDS signal generator output pure white signal; Whether after the startup industry vidicon gathers liquid crystal panel image to be measured, analyzing has dim spot to exist; Exist and exceed if any dark spot signal and set the permissible range system and be judged as the NG screen, otherwise then automatic decision is qualified screen.
Further in the detecting step, export pure red signal by industrial computer and control analysis unit controls LVDS signal generator; After starting industry vidicon and gathering liquid crystal panel image to be measured, whether each pixel R component of analysis image signal reaches red normal value, detects simultaneously G, B component value whether near 0 value or allowed band; R, G, B component value exceed the interior value of setting range and then are judged as the NG screen, otherwise then automatic decision is qualified screen.
Further in the detecting step, export pure green by industrial computer and control analysis unit controls LVDS signal generator; After the startup industry vidicon gathers liquid crystal panel image to be measured, whether each pixel B component of analysis image signal reaches blue red normal value, detect simultaneously R, B component value whether near 0 value or allowed band, R, G, the B component value exceeds the interior value of setting range and then is judged as the NG screen, otherwise then automatic decision is qualified screen.
Further in the detecting step, by industrial computer and control analysis unit controls LVDS signal generator output GTG signal; After the startup industry vidicon gathered liquid crystal panel image to be measured, whether each pixel rgb value of analysis image signal exceeded value in the setting range, shield if exceed then be judged as NG, otherwise then automatic decision was qualified screen.
Further in the detecting step, start the image that industry vidicon gathers liquid crystal panel to be measured, whether the outward appearance of analyzing liquid crystal panel to be measured exists physical imperfection, comprise cut or foreign matter, if there is physical imperfection, then be judged as the NG screen, otherwise then automatic decision is qualified screen.
A kind of Auto-Test System of LVDS interface liquid crystal display, comprise industrial computer, industry vidicon, LVDS signal generator and control analysis unit, the control analysis cellular installation is in industrial computer, being used for control LVDS signal generator carries display, control industry vidicon to take the image that liquid crystal panel to be measured and analytical industry camera are transported to industrial computer to liquid crystal panel to be measured, the LVDS signal generator is provided be used to the power supply input port and the signal input that connect liquid crystal panel to be measured, and LVDS signal generator and industry vidicon are connected to industrial computer.
Further in the technical scheme, Auto-Test System comprises a test result output module, and control analysis unit connecting test is output module as a result.
After adopting said structure, the present invention is compared with existing technology the advantage that has and is:
Whether the present invention detects LCDs automatically by the LVDS interface qualified, the full-automatic detection, and detection efficiency is high, and accurately height reduces production costs.
Description of drawings:
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is the test synoptic diagram of the Auto-Test System of LVDS interface liquid crystal display.
Fig. 2 is the connection diagram of the Auto-Test System of LVDS interface liquid crystal display.
Embodiment:
The following stated only is preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.
Embodiment one
A kind of automatic test approach of LVDS interface liquid crystal display is seen shown in Fig. 1-2,
The voltage output of LVDS signal generator 2 accesses the power supply input port of liquid crystal display to be measured, offers the normal operating voltage of liquid crystal panel to be tested;
The LVDS signal output of LVDS signal generator 2 is connected to the signal input of liquid crystal panel to be tested, supplies with detection signal;
Control LVDS signal generator 2 outputs one display is by the image of industry vidicon 3 collections liquid crystal panel 1 to be measured;
Analyze the image of the liquid crystal panel to be measured 1 that gathers, whether automatic decision liquid crystal panel to be tested is qualified;
Test result is outputed to test result output module.
The concrete detection method of the present invention comprises following detecting step:
By industrial computer 4 and control analysis unit controls LVDS signal generator 2 output ater signals; Whether after starting the image of industry vidicon 3 collections liquid crystal panel 1 to be measured, analyzing has bright spot to exist; Have and exceed the setting permissible range if any the bright spot signal, automatic decision is the NG screen, and the NG screen is defective screen, otherwise then automatic decision is qualified screen.
By industrial computer 4 and control analysis unit controls LVDS signal generator 2 output pure white signals; Whether after starting the image of industry vidicon 3 collections liquid crystal panel 1 to be measured, analyzing has dim spot to exist; Exist and exceed if any dark spot signal and set the permissible range system and be judged as the NG screen, otherwise then automatic decision is qualified screen.
By industrial computer 4 and the pure red signal of control analysis unit controls LVDS signal generator 2 outputs; After starting industry vidicon 3 and gathering the image of liquid crystal panel 1 to be measured, whether each pixel R component of analysis image signal reaches red normal value, detects simultaneously G, B component value whether near 0 value or allowed band; R, G, B component value exceed the interior value of setting range and then are judged as the NG screen, otherwise then automatic decision is qualified screen.
By industrial computer 4 and the pure green of control analysis unit controls LVDS signal generator 2 outputs; After starting the image of industry vidicon 3 collections liquid crystal panel 1 to be measured, whether each pixel G component of analysis image signal reaches green normal value, detect simultaneously R, B component value whether near 0 value or allowed band, R, G, the B component value exceeds the interior value of setting range and then is judged as the NG screen, otherwise then automatic decision is qualified screen.
By industrial computer 4 and control analysis unit controls LVDS signal generator 2 output GTG signals; After starting the image of industry vidicon 3 collections liquid crystal panel 1 to be measured, whether each pixel rgb value of analysis image signal exceeds value in the setting range, shield if exceed then be judged as NG, otherwise then automatic decision is qualified screen.
Start the image that industry vidicon 3 gathers liquid crystal panel 1 to be measured, whether the outward appearance of analyzing liquid crystal panel 1 to be measured exists physical imperfection, comprises cut or foreign matter, if there is physical imperfection, then be judged as the NG screen, otherwise then automatic decision is qualified screen.The present invention the LCDs Presentation Function performance that automatically detects the LVDS interface simultaneously can also detection display outward appearance whether exist unusually, such as cut, foreign matter etc. bad order phenomenon.
Take industrial computer 4 as the master control carrier, coordinate the different pattern of LVDS signal generator unit 2 outputs to LVDS interface LCDs to be detected by the unified control in control analysis unit, gather the picture information that LCDs 1 to be measured shows by the industrial camera 3 that is connected to industrial computer 4, export the result who analyzes after judging to test result output module, the production control line produces the non-defective unit of line and the automatic shunt of defective products.The present invention changes the operator of original each erect-position of line production into existing equipment and automatically tests and control, and realizes the full-automation that the liquid crystal display picture detects, and can line production, automatically detects and arrives at a station, and has saved manpower, has improved detection efficiency.
Embodiment two
A kind of Auto-Test System of LVDS interface liquid crystal display, it realizes embodiment one described liquid crystal panel automatic test approach, shown in Fig. 1-2, comprise industrial computer 4, industry vidicon 3, LVDS signal generator 2 and control analysis unit, the control analysis cellular installation is in industrial computer 4, the control analysis unit is for detection of whether connecting liquid crystal panel 1 to be measured, the control analysis unit is used for control LVDS signal generator 2 to be provided power supply and carries display to liquid crystal panel 1 to be measured, control analysis unit controls industry vidicon 3 is taken liquid crystal panel to be measured, control analysis element analysis industry vidicon 3 is transported to the image of industrial computer 4, LVDS signal generator 2 is provided with power supply input port and signal input, be used for connecting liquid crystal panel 1 to be measured, be used for power supply being provided and carrying display to liquid crystal panel 1 to be measured, LVDS signal generator 2 and industry vidicon 3 are connected to industrial computer 4.
Auto-Test System comprises a test result output module, and control analysis unit connecting test is output module as a result, and the result that the control analysis unit will be analyzed after judging exports test result output module to.
Above content is preferred embodiment of the present invention only, for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, and this description should not be construed as limitation of the present invention.
Claims (9)
1. the automatic test approach of a LVDS interface liquid crystal display is characterized in that:
The voltage output of LVDS signal generator accesses the power supply input port of liquid crystal display to be measured, offers the normal operating voltage of liquid crystal panel to be tested;
The LVDS signal output of LVDS signal generator is connected to the signal input of liquid crystal panel to be tested, supplies with detection signal;
Control LVDS signal generator is exported a display, gathers liquid crystal panel image to be measured by industry vidicon;
Analyze the liquid crystal panel image to be measured that gathers, whether automatic decision liquid crystal panel to be tested is qualified;
Test result is outputed to test result output module.
2. the automatic test approach of a kind of LVDS interface liquid crystal display according to claim 1 is characterized in that: by industrial computer and control analysis unit controls LVDS signal generator output ater signal; Whether after the startup industry vidicon gathers liquid crystal panel image to be measured, analyzing has bright spot to exist; Have and exceed the setting permissible range if any the bright spot signal, automatic decision is the NG screen, otherwise then automatic decision is qualified screen.
3. the automatic test approach of a kind of LVDS interface liquid crystal display according to claim 1 is characterized in that: by industrial computer and control analysis unit controls LVDS signal generator output pure white signal; Whether after the startup industry vidicon gathers liquid crystal panel image to be measured, analyzing has dim spot to exist; Exist and exceed if any dark spot signal and set the permissible range system and be judged as the NG screen, otherwise then automatic decision is qualified screen.
4. the automatic test approach of a kind of LVDS interface liquid crystal display according to claim 1 is characterized in that: export pure red signal by industrial computer and control analysis unit controls LVDS signal generator; After starting industry vidicon and gathering liquid crystal panel image to be measured, whether each pixel R component of analysis image signal reaches red normal value, detects simultaneously G, B component value whether near 0 value or allowed band; R, G, B component value exceed the interior value of setting range and then are judged as the NG screen, otherwise then automatic decision is qualified screen.
5. the automatic test approach of a kind of LVDS interface liquid crystal display according to claim 1 is characterized in that: export pure green by industrial computer and control analysis unit controls LVDS signal generator; After the startup industry vidicon gathers liquid crystal panel image to be measured, whether each pixel G component of analysis image signal reaches green normal value, detect simultaneously R, B component value whether near 0 value or allowed band, R, G, the B component value exceeds the interior value of setting range and then is judged as the NG screen, otherwise then automatic decision is qualified screen.
6. the automatic test approach of a kind of LVDS interface liquid crystal display according to claim 1 is characterized in that: by industrial computer and control analysis unit controls LVDS signal generator output GTG signal; After the startup industry vidicon gathered liquid crystal panel image to be measured, whether each pixel rgb value of analysis image signal exceeded value in the setting range, shield if exceed then be judged as NG, otherwise then automatic decision was qualified screen.
7. the automatic test approach of a kind of LVDS interface liquid crystal display according to claim 1, it is characterized in that: start the image that industry vidicon gathers liquid crystal panel to be measured, whether the outward appearance of analyzing liquid crystal panel to be measured exists physical imperfection, comprise cut or foreign matter, if there is physical imperfection, then be judged as the NG screen, otherwise then automatic decision is qualified screen.
8. the automatic test of the LVDS interface liquid crystal display of one of right to use requirement 1-7
The Auto-Test System of method, it is characterized in that: comprise industrial computer, industry vidicon, LVDS signal generator and control analysis unit, the control analysis cellular installation is in industrial computer, being used for control LVDS signal generator carries display, control industry vidicon to take the image that liquid crystal panel to be measured and analytical industry camera are transported to industrial computer to liquid crystal panel to be measured, the LVDS signal generator is provided be used to the power supply input port and the signal input that connect liquid crystal panel to be measured, and LVDS signal generator and industry vidicon are connected to industrial computer.
9. Auto-Test System according to claim 8, it is characterized in that: comprise a test result output module, control analysis unit connecting test is output module as a result.
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| CN104469353A (en) * | 2014-12-11 | 2015-03-25 | 武汉精测电子技术股份有限公司 | Device for detecting quality of LVDS video signals |
| CN104849885A (en) * | 2015-06-08 | 2015-08-19 | 武汉精测电子技术股份有限公司 | Integrated device and method for implementing liquid crystal module test based on industrial personal computer |
| CN106454329A (en) * | 2016-10-26 | 2017-02-22 | 中国电子产品可靠性与环境试验研究所 | Image acquisition detection system and method |
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Application publication date: 20131030 |