CN103686153B - A kind of contrast test system - Google Patents
A kind of contrast test system Download PDFInfo
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- CN103686153B CN103686153B CN201310683504.3A CN201310683504A CN103686153B CN 103686153 B CN103686153 B CN 103686153B CN 201310683504 A CN201310683504 A CN 201310683504A CN 103686153 B CN103686153 B CN 103686153B
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Abstract
The invention discloses a kind of contrast test system, to improve contrast testing efficiency and measuring accuracy.In the present invention, data processing equipment sends test instruction to signal generator, and the pin transmitted by corresponding data in the USB interface of display device to be tested is to display device sending mode control instruction to be tested；After signal generator receives test instruction, the pin shown by USB interface correspondence picture sends video signal to display device to be tested, display device to be tested display black and white window picture；Data acquisition unit monitoring black and white window picture, gathers the test data for contrast test, and test data is transferred to data processing equipment；The test data received are carried out contrast calculating by data processing equipment, obtain the contrast value of display device to be tested.Treating the test of test display apparatus contrast by present invention achieves unartificial mode, reducing error probability, improve contrast measuring accuracy, and improve efficiency.
Description
Technical field
The present invention relates to liquid crystal tv technology field, particularly relate to a kind of contrast test system.
Background technology
Along with the development of lcd technology, LCD TV application is more and more extensive.
LCD TV carries out in the processes such as dualization delivery node at exploitation, test, optics, for ensureing product yield, it is necessary to the multiple optical parametric of LCD TV is tested, for instance brightness, contrast, colour gamut and COLOR COMPOSITION THROUGH DISTRIBUTION etc..Wherein, contrast value is a comparatively important optical characteristics of LCD TV, contrast is very crucial on the impact of visual effect, in general contrast is more big, image is more clear eye-catching, color is also more distinct gorgeous, and contrast is more little, image is more fuzzy, therefore the detection of contrast is most important, at present relatively frequently with detection mode be manual detection mode, staff is by gathering the brightness value under LCD TV display black and white window picture, carry out artificial calculating and obtain contrast value, then the contrast value calculated and setting value are compared, and then judge whether this contrast value meets requirement.
General, adopting the detection mode of manual testing's contrast, test process is loaded down with trivial details, and testing efficiency is low, it is easy to test errors occur, certainty of measurement is relatively low.
Summary of the invention
It is an object of the invention to provide a kind of contrast test system, to improve testing efficiency and measuring accuracy.
It is an object of the invention to be achieved through the following technical solutions:
The present invention provides a kind of contrast test system, including: data processing equipment, has the display device to be tested of Video Graphics Array USB interface, data acquisition unit and signal generator, wherein,
Described data processing equipment is for sending test instruction to described signal generator, and the pin by transmitting corresponding to data in described USB interface, to described display device sending mode control instruction to be tested, described mode control instruction is for indicating described display device to be tested to show different image modes；
Described signal generator is for according to described test instruction, by the pin shown corresponding to image in described USB interface, sending video signal to described display device to be tested, described video signal shows the black and white window picture for contrast test for indicating described display device to be tested；
Described display device to be tested, according to described video signal and described mode control instruction, under the image mode of present mode control instruction instruction, display is for the black and white window picture of contrast test；
Described data acquisition unit gathers the test data for contrast test in described black and white window picture, and described test data are transferred to described data processing equipment；
The test data received are carried out contrast calculating by described data processing equipment, obtain the contrast value that described display device to be tested is corresponding under the image mode that present mode control instruction indicates.
Preferably, this system also includes first data transmission line and the second data line, is constituted with simplified system, wherein,
Described data processing equipment passes through described first data transmission line, and corresponding to the first pin of data transmission in described USB interface, to described display device sending mode control instruction to be tested；
Described display device to be tested passes through described second data line, and corresponding to the second pin of data transmission in described USB interface, sends feedback command to described data processing equipment.
It is more highly preferred to, this system also includes a VGA lead-in wire with USB adapter and the 2nd VGA lead-in wire with USB adapter, and described first data transmission line and described second data line are that serial ports turns USB line, in order to the connection of data processing equipment and display device to be tested, wherein
Oneth VGA lead-in wire has USB adapter one end and connects described first data transmission line, not having USB adapter one end and connect described first pin, described data processing equipment is gone between by a described VGA, described first data transmission line and described first pin be to described display device sending mode control instruction to be tested；
2nd VGA lead-in wire has USB adapter one end and connects the second data line, not having USB adapter one end and connect described second pin, described display device to be tested sends feedback command by described VGA the 2nd VGA lead-in wire, described second data line and described second pin to described data processing equipment.
It is further preferred that this system also include with described USB interface in corresponding to ground pin connection the 3rd VGA lead-in wire, described 3rd VGA lead-in wire connect earth lead, by described earth lead ground connection, to strengthen system stability.
Preferably, described data processing equipment is connected by RS232 line with described signal generator, and simplified system is constituted.
Preferably, described data processing equipment is connected by general-purpose serial bus USB print wire with described data acquisition unit, and simplified system is constituted.
Preferably, described data processing equipment is the personal computer PC being provided with contrast test software.
Preferably, described data acquisition unit is color analyzer.
nullThe contrast test system provided in the embodiment of the present invention，Display device to be tested has USB interface，Data processing equipment by USB interface corresponding to the pin of data transmission to display device sending mode control instruction to be tested，Signal generator sends video signal by the pin shown corresponding to image in USB interface to display device to be tested，Make video signal and mode control instruction can be simultaneously transferred to display device to be tested by the pin that USB interface is different，Display device to be tested shows the black and white window picture for contrast test，Data acquisition unit collecting test Data Concurrent gives data processing equipment，And then data processing equipment can obtain the contrast value of this display device to be tested by these test data，Contrast test process is realized simple，And reduce error probability，Improve contrast measuring accuracy，And improve efficiency.
Accompanying drawing explanation
The contrast test system structure that Fig. 1 provides for the embodiment of the present invention constitutes schematic diagram；
Another contrast test system structure that Fig. 2 provides for the embodiment of the present invention constitutes schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, is not whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
USB interface is a kind of D type interface, it has 15 pins, is divided into three rows, often row five, including the pin shown for image, for instance for transmitting the pin of RGB color component, and for transmitting the pin of scanning synchronizing signal, also include the pin for transmitting data and ground pin etc..The number of pin utilizing USB interface in the embodiment of the present invention is sufficient, it is possible to be used for transmitting data, it is also possible to transmission, for showing the advantage of the signal of image, designs a kind of contrast test system.
Embodiment one
The embodiment of the present invention one provides a kind of contrast test system, as shown in Figure 1, including data processing equipment 1, there is VGA (VideoGraphicsArray, Video Graphics Array) display device to be tested 2 of interface, data acquisition unit 3 and signal generator 4, wherein, data processing equipment 1 sends test instruction to signal generator 4, and by USB interface corresponding to the pin of data transmission to display device 2 sending mode control instruction to be tested, this mode control instruction is for indicating display device to be tested to show different image modes, such as may indicate that display device to be tested display color temperature mode, menu mode etc..After signal generator 4 receives this test instruction, video signal is sent to display device 2 to be tested by the pin shown corresponding to image in USB interface, this video signal shows the black and white window picture for contrast test for indicating display device to be tested, video signal that display device 2 to be tested sends according to signal generator 4 and the mode control instruction that data processing equipment 1 sends, under the image mode of present mode control instruction instruction, display is for the black and white window picture of contrast test, data acquisition unit 3 monitors the black and white window picture of display device 2 to be tested display, black and white window picture gathers the test data for contrast test, and test data are transferred to data processing equipment 1；The test data received are carried out contrast calculating by data processing equipment 1, obtain the contrast value that display device 2 to be tested is corresponding under the image mode that present mode control instruction indicates.
In the embodiment of the present invention, contrast test system also includes first data transmission line and the second data line, and wherein, data processing equipment passes through first data transmission line, and corresponding to the first pin of data transmission in USB interface, to display device sending mode control instruction to be tested.
Display device to be tested passes through the second data line, and corresponding to the second pin of data transmission in USB interface, sends feedback command to data processing equipment.
In the embodiment of the present invention, data processing equipment 1 can be the PC(PersonalComputer being provided with contrast test software, personal computer), certainly do not regard it as and be limited, for instance can also is that notebook computer or embedded system etc..Data acquisition unit 3 can be a color analyzer, and display device 2 to be tested can be LCD TV, it is also possible to for liquid crystal display etc..Will with data processing equipment 1 for PC below the embodiment of the present invention, data acquisition unit 3 is color analyzer, and display device 2 to be tested is illustrated for LCD TV.
The LCD TV contrast test system provided in the embodiment of the present invention, mainly include the installation Comparison degree test PC of software, color analyzer, LCD TV and signal generator, for realizing the automatic test of contrast, the embodiment of the present invention utilizes USB(UniversalSerialBus, USB (universal serial bus)) print wire connects color analyzer and PC, utilize serial ports to turn USB line and connect LCD TV and PC, utilize RS232 line to connect signal generator and PC, as shown in Figure 2.
Further, in the embodiment of the present invention, signal generator is connected with the USB interface of LCD TV by VGA line, signal generator has the first USB interface, LCD TV has the second USB interface, first USB interface and the second USB interface are connected by VGA line, namely VGA line one end connects signal generator, and the other end connects LCD TV.
In the embodiment of the present invention, for the ease of the connection between PC and liquid crystal display, contrast test system includes two VGA lead-in wires, a respectively VGA lead-in wire and the 2nd VGA lead-in wire, wherein, oneth VGA lead-in wire is connected a USB adapter respectively with the 2nd VGA lead-in wire, first data transmission line and the second data line is set to serial ports and turns USB line, it is achieved the serial ports of PC is connected with the second USB interface of liquid crystal display.
Concrete, a VGA lead-in wire is connected corresponding to the first pin of data transmission with the second USB interface (USB interface of LCD TV)；2nd VGA lead-in wire is connected corresponding to the second pin of data transmission with the second USB interface.The embodiment of the present invention such as, can will cut off with the connecting line of 12 pins in USB interface and 15 pins in VGA line, and extend as a VGA lead-in wire and the 2nd VGA lead-in wire from the connecting line being connected with second USB interface one end.
Further, in the embodiment of the present invention, a VGA lead-in wire has one end connection first data transmission line of USB adapter, it is connected with PC by first data transmission line, PC is by a VGA lead-in wire, first data transmission line and corresponding to the first pin of data transmission to LCD TV sending mode control instruction, 2nd VGA lead-in wire has one end of USB adapter and connects the second data line, it is connected with PC by the second data line, LCD TV is by the 2nd VGA lead-in wire, second data line and the second pin corresponding to data transmission feed back the feedback command whether receiving mode control instruction to PC.
Preferably, for ensureing the stability of USB interface in the embodiment of the present invention, 3rd VGA lead-in wire also can be set, 3rd VGA goes between the ground pin connection in one end and the second USB interface (USB interface of LCD TV), the other end connects an earth lead, by earth lead ground connection, strengthen the stability of USB interface.
The embodiment of the present invention is connected by VGA line between signal generator with LCD TV, and the USB port arranged in being gone between by VGA line is connected with PC, make by this USB interface, can between LCD TV and signal generator transmission video signal, between LCD TV and PC, data can be transmitted by the mode of serial communication again.
nullConcrete，In the embodiment of the present invention, PC sends test command based on serial communication to signal generator，To LCD TV sending mode control instruction，After signal generator receives this test instruction，The video signal of display black and white window picture is sent to LCD TV，LCD TV is made to show the black and white window picture for contrast test，The black and white window picture that color analyzer detection LCD TV shows，Gather the test data for contrast test，This test packet draws together the brightness value L V0 that in black and white window picture, white field L0 point is corresponding，And black field L1 in black and white window picture、L2、L3、The brightness value L V1 that L4 each point is corresponding、LV2、LV3、LV4，Wherein L0、L1、L2、L3 and L4 LCD TV is fixed for the point of contrast test in black and white window picture，After color analyzer collects test data，By USB print wire, test data feedback is returned PC，PC utilizes the test data received，According to formula C=LV0/ (LV1+LV2+LV3+LV4)/4，C is contrast value，Final calculating obtains the contrast value of LCD TV.
The contrast test system that the embodiment of the present invention provides, data processing equipment is based on the mode of serial communication, make signal generator control display device to be tested and show the black and white window picture for contrast test, data acquisition unit collecting test Data Concurrent send data processing equipment, and then data processing equipment can obtain the contrast value of this display device to be tested by these test data, achieve unartificial mode and treat the test of test display apparatus contrast, test process is simple, and reduce error probability, improve contrast measuring accuracy, and improve efficiency.
Embodiment two
The process that above-mentioned contrast test system is carried out contrast test in conjunction with practical application by the embodiment of the present invention two is described in detail.
Concrete, the embodiment of the present invention carries out for the process testing LCD TV contrast, illustrates, certainly do not regard it as and be limited.
First, it is provided that a contrast test system.
Concrete, in the embodiment of the present invention, contrast test system includes being provided with the contrast test PC of software, signal generator, LCD TV and color analyzer, turning USB line, USB print wire and RS232 line with serial ports makes LCD TV, color analyzer and signal generator be connected with the PC being provided with contrast test software respectively, and makes to be connected by USB interface between signal generator with LCD TV.
In the embodiment of the present invention, at PC end, serial ports is installed and turns USB debugging board driver, color analyzer driver, test software by the contrast on PC and be uniformly controlled LCD TV, color analyzer and signal generator, between PC and LCD TV, color analyzer and signal generator, carry out the transmission of instruction based on serial communication mode.
Secondly, run each device in contrast test system, sent test instruction and the mode control instruction for indicating display device to be tested display black and white window picture by PC simultaneously.
Concrete, after the embodiment of the present invention completes the hardware connection of contrast test system, LCD TV and the Serial Port Transmission speed of signal generator use are set, LCD TV, signal generator and color analyzer are completed power on operation, and color analyzer is corrected.
The PC of contrast test software is installed, based on serial communication mode, send for indicating LCD TV to show the test instruction for black and white window picture, signal generator performs the test instruction received, transmitting after video signal to LCD TV according to this test instruction, LCD TV carries out the display of black and white window picture.
Again, the test data for contrast test are gathered.
Concrete, by color analyzer collecting test data in the embodiment of the present invention, the test packet gathered draws together the brightness value L V0 that in black and white window picture, white field L0 point is corresponding, and the brightness value L V1 that in black and white window picture, black field L1, L2, L3, L4 each point is corresponding, LV2, LV3, LV4, wherein L0, L1, L2, L3 and L4 LCD TV is fixed for the point of contrast test in black and white window picture, color analyzer by the test data feedback that collects to PC.
Finally, carry out the calculating of contrast, complete contrast test.
Concrete, in the embodiment of the present invention, after PC end receives the test data for contrast test, it is contrast value according to formula according to formula C=LV0/ (LV1+LV2+LV3+LV4)/4, C, final calculates the contrast value obtaining LCD TV.
Further, calculated LCD TV contrast value can be backed-up by the embodiment of the present invention, after completing contrast test process, according to calculated contrast value, the unified LCD TV being determined for compliance with specification and the LCD TV fallen short of specifications.
The contrast method of testing that the embodiment of the present invention provides, mode based on serial communication, control display device to be tested and show the black and white window picture for contrast test, gather in black and white window picture for carrying out the test data of contrast test, carried out the calculating of contrast value by these test data, it is possible to obtain the contrast value of this display device to be tested, realize the contrast test of unartificial mode, reduce error probability, improve contrast measuring accuracy, and improve efficiency.
Obviously, the present invention can be carried out various change and modification without deviating from the spirit and scope of the present invention by those skilled in the art.So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. contrast test system, it is characterised in that including: data processing equipment, there is the display device to be tested of Video Graphics Array USB interface, data acquisition unit and signal generator, wherein,
Described data processing equipment is for sending test instruction to described signal generator, and the pin by transmitting corresponding to data in described USB interface, to described display device sending mode control instruction to be tested, described mode control instruction is for indicating described display device to be tested to show different image modes；
Described signal generator is for according to described test instruction, by the pin shown corresponding to image in described USB interface, sending video signal to described display device to be tested, described video signal shows the black and white window picture for contrast test for indicating described display device to be tested；
Described display device to be tested, according to described video signal and described mode control instruction, under the image mode of present mode control instruction instruction, display is for the black and white window picture of contrast test；
Described data acquisition unit gathers the test data for contrast test in described black and white window picture, and described test data are transferred to described data processing equipment；
The test data received are carried out contrast calculating by described data processing equipment, obtain the contrast value that described display device to be tested is corresponding under the image mode that present mode control instruction indicates；
Wherein, this system also includes first data transmission line and the second data line, wherein,
Described data processing equipment passes through described first data transmission line, and corresponding to the first pin of data transmission in described USB interface, to described display device sending mode control instruction to be tested；
Described display device to be tested passes through described second data line, and corresponding to the second pin of data transmission in described USB interface, sends feedback command to described data processing equipment；
Wherein, this system also includes a VGA lead-in wire with USB adapter and the 2nd VGA lead-in wire with USB adapter, and described first data transmission line and described second data line are that serial ports turns USB line, wherein,
Oneth VGA lead-in wire has USB adapter one end and connects described first data transmission line, not having USB adapter one end and connect described first pin, described data processing equipment is gone between by a described VGA, described first data transmission line and described first pin be to described display device sending mode control instruction to be tested；
2nd VGA lead-in wire has USB adapter one end and connects the second data line, not having USB adapter one end and connect described second pin, described display device to be tested sends feedback command by described 2nd VGA lead-in wire, described second data line and described second pin to described data processing equipment；
Wherein, VGA line will be cut off with the connecting line of 12 pins in USB interface and 15 pins, and extend as a VGA lead-in wire and the 2nd VGA lead-in wire from the connecting line being connected with described USB interface one end.
2. contrast test system as claimed in claim 1, it is characterised in that this system also include with described USB interface in corresponding to the 3rd VGA lead-in wire of ground pin connection, described 3rd VGA lead-in wire connects earth lead, by described earth lead ground connection.
3. contrast test system as claimed in claim 1, it is characterised in that described data processing equipment is connected by RS232 line with described signal generator.
4. contrast test system as claimed in claim 1, it is characterised in that described data processing equipment is connected by general-purpose serial bus USB print wire with described data acquisition unit.
5. contrast test system as claimed in claim 1, it is characterised in that described data processing equipment is the personal computer PC being provided with contrast test software.
6. the contrast test system as described in claim 1 or 5, it is characterised in that described data acquisition unit is color analyzer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105575302B (en) * | 2015-12-18 | 2018-11-02 | 广州视源电子科技股份有限公司 | Show apparatus testing method and system |
| CN106918933A (en) * | 2017-03-10 | 2017-07-04 | 京东方科技集团股份有限公司 | Contrast test system |
| CN107221275B (en) * | 2017-07-26 | 2021-04-20 | 昆山龙腾光电股份有限公司 | Display screen contrast detection system and method |
| CN109600604B (en) * | 2018-11-09 | 2020-07-03 | 歌尔股份有限公司 | Contrast testing method, device and computer readable storage medium |
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