CN110412782B - Liquid crystal display device testing system and testing method - Google Patents
Liquid crystal display device testing system and testing method Download PDFInfo
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- CN110412782B CN110412782B CN201910710576.XA CN201910710576A CN110412782B CN 110412782 B CN110412782 B CN 110412782B CN 201910710576 A CN201910710576 A CN 201910710576A CN 110412782 B CN110412782 B CN 110412782B
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses a liquid crystal display device test system and a test method thereof, wherein the test system comprises a test device, a video signal source, a first interface and a second interface which are arranged on the liquid crystal display device, the test device comprises a test special module, a signal processing system, a power module, a third interface and a fourth interface, the video signal source is arranged between the first interface and the third interface, the second interface is matched with the fourth interface and is used for realizing data interaction between the test special module and the liquid crystal display device, the test method inputs or selects test items and parameters through the test special module and transmits the test items and parameters to the liquid crystal display device, the signal processing system processes the video signal of the liquid crystal display device, further, the test result is displayed on the test special module, and finally judgment is carried out according to the test result, thereby completing the test. The invention can be applied to liquid crystal display devices in different occasions, and has the characteristics of simple operation, high test efficiency and low cost.
Description
Technical Field
The present invention relates to the field of liquid crystal display testing technology, and in particular, to a system and a method for testing a liquid crystal display device.
Background
The liquid crystal display device has the advantages of light weight, small volume, low power consumption, small volume and the like, and gradually replaces the traditional CRT kinescope device, thereby being widely applied to various fields of industrial display, consumer display and the like. The liquid crystal display device mainly comprises a liquid crystal display panel and a liquid crystal driving circuit, wherein the liquid crystal display panel comprises a liquid crystal screen, an LED backlight, a signal interface and other modules, and the liquid crystal driving circuit comprises a signal processing circuit, an LED backlight driving circuit, a power module and the like. With the wider and wider application of lcd devices, it is particularly important to test the performance and function of lcd devices.
At present, two main methods for testing liquid crystal display devices produced by domestic liquid crystal display device manufacturers are available: test system and method based on manual test method and PC. The manual test method can only finish detection of partial functions and performances, has lower test efficiency and higher cost, and the test result is influenced by professional quality of the testers; for example, patent 201310320130.9 discloses a device for detecting an LCD and a backlight module and a detection method thereof, and the device can detect an LCD display device, and has low test efficiency and accuracy due to manual observation; the PC-based test system and method are generally used for testing liquid crystal display modules in laboratories and factories and are limited by the use conditions and the test conditions of the tested liquid crystal display modules.
In view of this, how to design a testing system and a testing method for a liquid crystal display device, which are easy to operate, high in testing efficiency, low in cost and applicable to different situations, is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a liquid crystal display device testing system and a testing method, which can accurately, reliably and efficiently test the functions and performances of a liquid crystal display device according to different types and different use occasions of the liquid crystal display device.
In order to solve the above technical problems, the present invention provides a testing system for a liquid crystal display device, comprising:
the testing device, the video signal source is located on the liquid crystal display device and is used for carrying out the first interface that exports liquid crystal display device video signal and is used for realizing the data interaction between testing device and the liquid crystal display device, testing device includes:
the special test module is used for inputting or (and) selecting test items and test parameters of the tested liquid crystal display device, and receiving and displaying test results of the tested liquid crystal display device;
the video signal source is arranged between the first interface and the third interface and used for collecting and transmitting video test signals of the liquid crystal display device, and the signal processing system is used for processing the received video test signals;
the fourth interface is matched with the second interface and is used for transmitting the video test signal processed by the signal processing system to the liquid crystal display device, and the data interaction between the special test module and the tested liquid crystal display device is realized through the fourth interface;
and the power supply module is used for supplying power to each functional module in the testing device.
As a further optimization of the technical scheme, the special test module is a man-machine interaction module for single machine test or an online special module for online test, and the single machine test and the online test are selected by switching a test mode switch arranged on the test system.
As a further optimization of the above technical solution, the signal processing system includes a video image preprocessing module, a microcontroller hardware circuit and a microcontroller software program, where the microcontroller hardware circuit is connected with the third interface, the fourth interface, the test special module and the video image preprocessing module, the video image preprocessing module is used to receive and process the video test signal input by the third interface, and transmit the processed video test signal to the fourth interface, and the microprocessor software program is used to drive the third interface, the fourth interface and the test special module to perform information interaction and data transmission with the signal processing system, respectively.
As a further optimization of the technical scheme, a specific operation implementation method for performing single-machine test on the tested liquid crystal display device is arranged in the microprocessor control software program.
As a further optimization of the above technical solution, the man-machine interaction module includes a display output module for displaying test items, test parameters and test results in the stand-alone test system, and a keyboard input module for inputting and/or selecting the test items and the test parameters in the stand-alone test system.
As a further optimization of the above technical scheme, the online special module comprises an upper computer, a fifth interface arranged on the testing device and used for realizing command and data transmission between the upper computer and the signal processing system, and application software arranged in the upper computer and used for inputting and/or selecting test items and test parameters in the online testing system.
As a further optimization of the above technical scheme, the power module comprises a direct current power supply and a power management module connected with the direct current power supply, and the power management module is respectively connected with the video image preprocessing module, the microcontroller hardware circuit and the microcontroller software program.
As a further refinement of the above solution, a housing for fixing and supporting the test device is also included.
A method for testing a liquid crystal display device, using the liquid crystal display device testing system of any one of the above, the method comprising the steps of:
s1, connecting a testing device with a liquid crystal display device by using a communication cable, and starting a power supply to initialize the testing system;
s2, transmitting the test items and the test parameters input and/or selected on the test special module to the tested liquid crystal display device through the fourth interface;
s3, processing the video signal of the tested liquid crystal display device by using a signal processing system, and transmitting the test result to a test special module through a fourth interface for display;
s4, an operator records and analyzes the test items, the test parameters and the test results displayed on the special test module;
s5, judging whether the test item is completed according to the test data displayed on the special test module in the step S4, returning to the step S2 if the test is not completed, and ending the test otherwise.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) The test system has simple structure and low cost, thereby being applicable to the test of the liquid crystal display device in various occasions;
(2) The invention can realize the single machine test and the on-line test of the liquid crystal display device by switching the test mode switch, thereby being capable of carrying out functional performance test according to the liquid crystal display devices with different specifications and models and having the characteristics of good universality, low test cost, high reliability and the like.
Drawings
FIG. 1 is a block diagram showing a testing system of a liquid crystal display device according to the present invention,
FIG. 2 is a schematic diagram showing a stand-alone testing system of a liquid crystal display device according to the present invention,
FIG. 3 is a schematic diagram showing an on-line testing system of a liquid crystal display device according to the present invention,
FIG. 4 is a flow chart of a testing method of a liquid crystal display device according to the present invention.
In the figure: 1. the system comprises a testing device, a testing special module, a man-machine interaction module, a connecting special module, a signal processing system, a video image preprocessing module, a microcontroller hardware circuit, a microcontroller software program, a third interface, a fourth interface, a power module, a direct current power supply, a power management module, a video signal source, a liquid crystal display device, a first interface, a second interface, a housing, a display output module, a keyboard input module, a host computer, an application software and a fifth interface.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
As shown, includes:
a testing device 1, a video signal source 2, a first interface 31 arranged on a liquid crystal display device 3 for outputting video signals of the liquid crystal display device, and a second interface 32 for realizing data interaction between the testing device 1 and the liquid crystal display device 3, wherein the testing device 1 comprises:
a test special module 11 for inputting or (and) selecting test items and test parameters of the liquid crystal display device, and receiving and displaying test results of the liquid crystal display device;
the video signal source 2 is arranged between the first interface 31 and the third interface 13 and is used for collecting and transmitting video test signals of the liquid crystal display device 3, and the signal processing system 12 is used for processing the received video test signals;
the fourth interface 14 is matched with the second interface 32 and is used for transmitting the video test signal processed by the signal processing system 12 to the liquid crystal display device 3, and the data interaction between the test special module 11 and the liquid crystal display device 3 is realized through the fourth interface 14;
a power module 15 for supplying power to the respective functional modules in the test device 1.
In this embodiment, an operator can input or (and) select test items and test parameters on the special test module 11 according to the test requirement of the tested liquid crystal display device 3 and transmit the test items and test parameters to the liquid crystal display device 3, the video signal source 2 transmits the collected video test signals to the signal processing system 12 for processing, and then the signal processing system 12 transmits the processed video test signals (i.e. test results) to the special test module 11 for display, so that the operator can judge according to the test results displayed on the special test module 11, and the test of the liquid crystal display device 3 is completed. The test system has the characteristics of simple structure, simplicity and convenience in operation, low cost and high test efficiency. In this embodiment, the main parameters of the lcd device 3 in the display process include a brightness value, a contrast value and a Gamma value, which are generally inconvenient to directly display on the display screen of the lcd device 3, and are difficult to perform field test by human eyes or instruments, so that the test device 1 is required to perform the test after reading and writing the internal parameters of the lcd device 3, that is, the video image preprocessing module 121 performs decoding and filtering operations of the video format, but does not change the content of the video signal.
As shown in fig. 1, 2 and 3, the test-dedicated module 11 is a man-machine interaction module 111 for stand-alone test or an online dedicated module 112 for online test, and the stand-alone test and the online test are selected by switching a test mode switch provided on the test system. In this embodiment, the test module switch is disposed on the test system housing, and triggers the test module switch by a set dial switch, and the switching between the man-machine interaction module 111 for stand-alone test and the online dedicated module 112 for online test is achieved by using the test mode switch, so as to achieve selective test between stand-alone test and online test.
As shown in fig. 1, 2 and 3, the signal processing system 12 includes a video image preprocessing module 121, a microcontroller hardware circuit 122 and a microcontroller software program 123, the microcontroller hardware circuit 122 is respectively connected to the third interface 13, the fourth interface 14, the test special module 11 and the video image preprocessing module 121, the video image preprocessing module 121 is used for receiving and processing the video test signal input by the third interface 13, and transmitting the processed video test signal to the fourth interface 14, and the microprocessor software program 123 is used for driving the third interface 13, the fourth interface 14 and the test special module 11 to respectively perform information interaction and data transmission with the signal processing system 12. In this embodiment, the video image preprocessing module 121, the microcontroller hardware circuit 122 and the microcontroller software program 123 in the signal processing system 12 realize the transmission and processing of the video test signal in the liquid crystal display device 3 and the transmission of the test result to the test special module 11 for display, and the device has simple structure, low cost and high reliability.
As shown in fig. 1 and 2, the microprocessor control software program 123 is provided with a specific operation implementation method for performing a stand-alone test on the liquid crystal display device 3. In this embodiment, the specific operation implementation method of the stand-alone test mode is provided in the microprocessor software program 123, so that the test items and the test parameters can be directly selected through the man-machine interaction module 111, and the operation is simple and the test efficiency is high.
As shown in fig. 2, the man-machine interaction module 111 includes a display output module 5 for displaying test items, test parameters and test results in the stand-alone test system, and a keyboard input module 6 for inputting and/or selecting the test items and the test parameters in the stand-alone test system. In this embodiment, the display output module 5 provides an intuitive and reliable test conclusion for the test operator, and the keyboard input module 6 provides an operation interface which is simple and convenient to use and humanized for the test operator.
As shown in fig. 3, the online special module 112 includes a host computer 7, a fifth interface 9 provided on the testing device 1 for implementing command and data transmission between the host computer and the signal processing system, and application software 8 provided in the host computer 7 for inputting and/or selecting test items and test parameters in the online testing system. In this embodiment, the upper computer 7 and the application software 8 provided in the upper computer 7 provide a working operation environment for inputting and/or selecting test items and test parameters, and the input and/or selected test parameters and test items can be transmitted to the liquid crystal display device 3 through the fifth interface 9, so that online testing of the liquid crystal display device 3 can be realized;
as shown in fig. 1, 2 and 3, the power module 15 includes a dc power source 151 and a power management module 152 connected to the dc power source 151, where the power management module 152 is connected to the video image preprocessing module 121, the microcontroller hardware circuit 122 and the microcontroller software program 123, respectively. In this embodiment, the power management module 152 connects an external dc power supply with each functional module in the testing device 1, so as to supply power to each functional module in the testing device 1, and ensure the normal operation of each functional module.
As shown in fig. 1, 2 and 3, the testing device 1 further comprises a housing 4 for fixing and supporting the testing device. In this embodiment, the microcontroller hardware circuit 122 in the testing device 1 is fixed and supported by the housing 4, and the testing device 1 can be protected from physical, chemical, environmental stress, and other damages during the testing process.
As shown in fig. 4, a method for testing a liquid crystal display device, which adopts the liquid crystal display device testing system described in any one of the above, comprises the following steps:
s1, connecting a testing device with a liquid crystal display device by using a communication cable, and starting a power supply to initialize the testing system;
s2, transmitting the test items and the test parameters input and/or selected on the test special module to the tested liquid crystal display device through the fourth interface;
s3, processing the video signal of the tested liquid crystal display device by using a signal processing system, and transmitting the test result to a test special module through a fourth interface for display;
s4, an operator records and analyzes the test items, the test parameters and the test results displayed on the special test module;
s5, judging whether the test item is completed according to the test data displayed on the special test module in the step S4, returning to the step S2 if the test is not completed, and ending the test otherwise.
In this embodiment, when the test mode switch on the test system is a stand-alone test, the keyboard input module inputs and/or selects the test items and the test parameters in the test system and transmits the test items and the test parameters to the display output module and the liquid crystal display device, then the video signal source collects video test signals on the liquid crystal display device, the collected video test signals are transmitted to the signal processing system for processing through the first interface and the third interface, and finally the signal processing system transmits the test results to the display output module, and the display output module displays the test results, the test items and the test parameters, so that the test operator judges the test conditions according to the display results. When the test mode switch on the test system is an on-line test, the test items and the test parameters in the test system are input and/or selected through the upper computer and the application software and transmitted to the liquid crystal display device, and other test flows are similar to those of the single-machine test, and only the test results of the liquid crystal display device are displayed through the upper computer, so that the description is omitted.
The system and the method for testing the liquid crystal display device provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the invention. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (8)
1. A liquid crystal display device testing system, comprising:
the testing device, the video signal source is located on the liquid crystal display device and is used for carrying out the first interface that exports liquid crystal display device video signal and is used for realizing the data interaction between testing device and the liquid crystal display device, testing device includes:
the special test module is used for inputting or/and selecting test items and test parameters of the liquid crystal display device, and receiving and displaying test results of the liquid crystal display device;
the video signal source is arranged between the first interface and the third interface and used for collecting and transmitting video test signals of the liquid crystal display device, and the signal processing system is used for processing the received video test signals;
the fourth interface is matched with the second interface and is used for transmitting the video test signal processed by the signal processing system to the liquid crystal display device, and data interaction between the special test module and the liquid crystal display device is realized through the fourth interface;
the power module is used for supplying power to each functional module in the testing device;
the signal processing system comprises a video image preprocessing module, a microcontroller hardware circuit and a microcontroller software program, wherein the microcontroller hardware circuit is respectively connected with a third interface, a fourth interface, a special test module and the video image preprocessing module, the video image preprocessing module is used for receiving and processing video test signals input by the third interface and transmitting the processed video test signals to the fourth interface, and the microcontroller software program is used for driving the third interface, the fourth interface and the special test module to respectively carry out information interaction and data transmission with the signal processing system;
the video image preprocessing module performs decoding and filtering operations of a video format;
the signal processing system transmits the processed video test signal to the special test module for display, and the main parameters of display comprise a brightness value, a contrast value and a Gamma value.
2. The system according to claim 1, wherein the special test module is a man-machine interaction module for stand-alone test or an on-line special test module for on-line test, and the stand-alone test and the on-line test are selected by switching a test mode switch provided on the test system.
3. The lcd device test system of claim 1, wherein the microcontroller software program is provided with a specific operation implementation method for performing a stand-alone test of the lcd device under test.
4. The system of claim 2, wherein the man-machine interaction module comprises a display output module for displaying test items, test parameters and test results in the stand-alone test system and a keyboard input module for inputting and/or selecting the test items and the test parameters in the stand-alone test system.
5. The system of claim 2, wherein the dedicated on-line module comprises a host computer, a fifth interface provided on the testing device for transmitting commands and data between the host computer and the signal processing system, and application software provided in the host computer for inputting and/or selecting test items and test parameters in the on-line testing system.
6. The lcd device test system of claim 2, wherein the power module comprises a dc power source and a power management module connected to the dc power source, the power management module being respectively connected to the video image preprocessing module, the microcontroller hardware circuit, and the microcontroller software program.
7. The liquid crystal display device testing system of claim 2, further comprising a housing for securing and supporting the testing device.
8. A method for testing a liquid crystal display device, characterized in that the liquid crystal display device testing system according to any one of claims 1 to 7 is employed, the method comprising the steps of:
s1, connecting a testing device with a liquid crystal display device by using a communication cable, and starting a power supply to initialize the testing system;
s2, transmitting the test items and the test parameters input and/or selected on the test special module to the tested liquid crystal display device through the fourth interface;
s3, processing the video signal of the tested liquid crystal display device by using a signal processing system, and transmitting the test result to a test special module through a fourth interface for display;
s4, an operator records and analyzes the test items, the test parameters and the test results displayed on the special test module;
s5, judging whether the test item is completed according to the test data displayed on the special test module in the step S4, returning to the step S2 if the test is not completed, and ending the test otherwise.
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