CN103686153A - Contrast ratio test system - Google Patents
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- CN103686153A CN103686153A CN201310683504.3A CN201310683504A CN103686153A CN 103686153 A CN103686153 A CN 103686153A CN 201310683504 A CN201310683504 A CN 201310683504A CN 103686153 A CN103686153 A CN 103686153A
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Abstract
The invention discloses a contrast ratio test system to improve the contrast ratio test efficiency and test accuracy. According to the contrast ratio test system, a data processing device sends a test instruction to a signal generator and sends a mode control instruction to a display device to be tested through the pin, corresponding to data transmission, in a VGA interface of the display device to be tested; the signal generator sends a video signal to the display device to be tested through the pin, corresponding to image display, in the VGA interface after receiving the test instruction, and a black and white window image is displayed on the display device to be tested; a data collection device monitors the black and white window image, collects test data used for the contrast test and transmits the test data to the data processing device; the data processing device conducts contrast ratio calculation on the received test data to obtain the contrast ratio value of the display device to be tested. According to the contrast ratio test system, the contrast ratio test is conducted on the display device to be tested through a non-manual method, the error probability is lowered, the contrast ratio test accuracy is improved, and the efficiency is improved.
Description
Technical field
The present invention relates to liquid crystal tv technology field, relate in particular to a kind of contrast test macro.
Background technology
Along with the development of lcd technology, LCD TV application is more and more extensive.
LCD TV is carried out in the processes such as dualization delivery node at exploitation, test, optics, for guaranteeing product yield, need to test to the multiple optical parametric of LCD TV for example brightness, contrast, colour gamut and COLOR COMPOSITION THROUGH DISTRIBUTION etc.Wherein, contrast value is the optical characteristics of an outbalance of LCD TV, contrast is very crucial on the impact of visual effect, in general contrast is larger, image is more clear eye-catching, color is also distincter gorgeous, and contrast is less, image is fuzzyyer, therefore the detection of contrast is most important, the normal detection mode adopting is manual detection mode at present, staff shows the brightness value under black and white window picture by gathering LCD TV, manually calculate contrast value, then the contrast value calculating and set point are compared, and then judge whether this contrast value meets the demands.
General, the detection mode of employing manual testing contrast, test process is loaded down with trivial details, and testing efficiency is low, easily occurs test errors, and certainty of measurement is lower.
Summary of the invention
The object of this invention is to provide a kind of contrast test macro, to improve testing efficiency and measuring accuracy.
The object of the invention is to be achieved through the following technical solutions:
The invention provides a kind of contrast test macro, comprising: data processing equipment, there is display unit to be tested, data acquisition unit and the signal generator of Video Graphics Array VGA interface, wherein,
Described data processing equipment is for sending test instruction to described signal generator, and by described VGA interface corresponding to the pin of transfer of data, to described display unit sending mode control command to be tested, described pattern control command is used to indicate described display unit to be tested and shows different image modes;
Described signal generator is used for according to described test instruction, by the pin showing corresponding to image in described VGA interface, to described display unit to be tested, send vision signal, described vision signal is used to indicate described display unit to be tested and shows the black and white window picture for contrast test;
Described display unit to be tested according to described vision signal and described pattern control command, shows the black and white window picture for contrast test under the image mode of present mode control command indication;
Described data acquisition unit gathers the test data for contrast test in described black and white window picture, and described test data is transferred to described data processing equipment;
Described data processing equipment carries out contrast calculating to the test data receiving, and obtains the contrast value of described display unit to be tested correspondence under the image mode of present mode control command indication.
Preferably, this system also comprises first data transmission line and the second data line, with simplification system, form, wherein,
Described data processing equipment is by described first data transmission line, and in described VGA interface corresponding to the first pin of transfer of data, to described display unit sending mode control command to be tested;
Described display unit to be tested is by described the second data line, and in described VGA interface corresponding to the second pin of transfer of data, to described data processing equipment, send feedback command.
More preferred, this system also comprises the 2nd VGA lead-in wire that has a VGA lead-in wire of USB converting interface and have USB converting interface, and described first data transmission line and described the second data line are that serial ports turns USB line, so that being connected of data processing equipment and display unit to be tested, wherein
The one VGA lead-in wire has USB converting interface one end and connects described first data transmission line, do not there is USB converting interface one end and connect described the first pin, described data processing equipment by a described VGA lead-in wire, described first data transmission line and described the first pin to described display unit sending mode control command to be tested;
The 2nd VGA lead-in wire has USB converting interface one end and connects the second data line, do not have USB converting interface one end and connect described the second pin, described display unit to be tested sends feedback command by described VGA the 2nd VGA lead-in wire, described the second data line and described the second pin to described data processing equipment.
The 3rd VGA lead-in wire further preferred, this system also comprises and is connected corresponding to ground pin in described VGA interface, described the 3rd VGA lead-in wire connection earth lead, by described earth lead ground connection, to strengthen the stability of a system.
Preferably, described data processing equipment is connected by RS232 line with described signal generator, and simplification system forms.
Preferably, described data processing equipment is connected by general-purpose serial bus USB print line with described data acquisition unit, and simplification system forms.
Preferably, described data processing equipment is the personal computer PC that contrast testing software is installed.
Preferably, described data acquisition unit is color analyzer.
The contrast test macro providing in the embodiment of the present invention, display unit to be tested has VGA interface, data processing equipment by VGA interface corresponding to the pin of transfer of data to display unit sending mode control command to be tested, signal generator sends vision signal by the pin showing corresponding to image in VGA interface to display unit to be tested, make vision signal and pattern control command to be sent to display unit to be tested by the different pin of VGA interface simultaneously, display unit to be tested shows the black and white window picture for contrast test, data acquisition unit collecting test Data Concurrent is given data processing equipment, and then data processing equipment can access the contrast value of this display unit to be tested by this test data, contrast test process is realized simple, and reduced error probability, improved contrast measuring accuracy, and improved efficiency.
Accompanying drawing explanation
The contrast test system structure formation schematic diagram that Fig. 1 provides for the embodiment of the present invention;
Another contrast test system structure formation schematic diagram that Fig. 2 provides for the embodiment of the present invention.
Embodiment
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, obviously, described embodiment is only the present invention's part embodiment, is not whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
VGA interface is a kind of D type interface, on it, have 15 pins, be divided into three rows, five of every rows, comprise the pin showing for image, for example, for transmitting the pin of RGB chrominance component, and for transmitting the pin of scan-synchronized signal, also comprise for transmitting the pin of data and ground pin etc.In the embodiment of the present invention, utilize the number of pin of VGA interface sufficient, can be used in transmission data, also can transmit for showing the advantage of the signal of image, design a kind of contrast test macro.
Embodiment mono-
The embodiment of the present invention one provides a kind of contrast test macro, as shown in Figure 1, comprise data processing equipment 1, there is VGA (Video Graphics Array, Video Graphics Array) display unit 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 VGA interface corresponding to the pin of transfer of data to display unit 2 sending mode control commands to be tested, this pattern control command is used to indicate display unit to be tested and shows different image modes, for example can indicate display unit to be tested to show colour temperature pattern, menu mode etc.Signal generator 4 receives after this test instruction, by the pin showing corresponding to image in VGA interface, to display unit 2 to be tested, send vision signal, this vision signal is used to indicate display unit to be tested and shows the black and white window picture for contrast test, the pattern control command that the vision signal that display unit 2 to be tested sends according to signal generator 4 and data processing equipment 1 send, under the image mode of present mode control command indication, show the black and white window picture for contrast test, the black and white window picture that data acquisition unit 3 monitoring display unit 2 to be tested shows, in black and white window picture, gather the test data for contrast test, and test data is transferred to data processing equipment 1, 1 pair of test data receiving of data processing equipment is carried out contrast calculating, obtains the contrast value of display unit 2 to be tested correspondence under the image mode of present mode control command indication.
In the embodiment of the present invention, contrast test macro also comprises first data transmission line and the second data line, and wherein, data processing equipment is by first data transmission line, and in VGA interface corresponding to the first pin of transfer of data, to display unit sending mode control command to be tested.
Display unit to be tested is by the second data line, and in VGA interface corresponding to the second pin of transfer of data, to data processing equipment, send feedback command.
In the embodiment of the present invention, data processing equipment 1 can be for being provided with the PC(Personal Computer of contrast testing software, personal computer), certainly do not regard it as and be limited, such as being notebook computer or embedded system etc.Data acquisition unit 3 can be a color analyzer, and display unit 2 to be tested can be LCD TV, can be also liquid crystal display etc.The embodiment of the present invention is following will take data processing equipment 1 as PC, and data acquisition unit 3 is color analyzer, and display unit 2 to be tested is illustrated for LCD TV.
The LCD TV contrast test macro providing in the embodiment of the present invention, the PC, color analyzer, LCD TV and the signal generator that mainly comprise installation Comparison degree testing software, for realizing the automatic test of contrast, in the embodiment of the present invention, utilize USB(Universal Serial Bus, USB) print line 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 VGA interface of LCD TV by VGA line, signal generator has a VGA interface, LCD TV has the 2nd VGA interface, the one VGA interface is connected by VGA line with the 2nd VGA interface, be that VGA line one end connects signal generator, the other end connects LCD TV.
In the embodiment of the present invention, for the ease of being connected between PC and liquid crystal display, contrast test macro comprises two VGA lead-in wires, be respectively a VGA lead-in wire and the 2nd VGA lead-in wire, wherein, the one VGA lead-in wire goes between and is connected respectively a USB converting interface with the 2nd VGA, and first data transmission line and the second data line are set to serial ports and turn USB line, realizes the serial ports of PC and the 2nd VGA interface of liquid crystal display is connected.
Concrete, a VGA lead-in wire is connected with the first pin corresponding to transfer of data in the 2nd VGA interface (the VGA interface of LCD TV); The 2nd VGA lead-in wire is connected with the second pin corresponding to transfer of data in the 2nd VGA interface.For example in the embodiment of the present invention can by VGA line with VGA interface in 12 pins and the connecting line of 15 pins cut off, and extend as a VGA lead-in wire and the 2nd VGA and go between from the connecting line that is connected with the 2nd VGA 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 converting interface, by first data transmission line, be connected with PC, PC goes between by a VGA, first data transmission line and corresponding to the first pin of transfer of data to LCD TV sending mode control command, one end that the 2nd VGA lead-in wire has USB converting interface connects the second data line, by the second data line, be connected with PC, LCD TV goes between by the 2nd VGA, the second data line and whether receive the feedback command of pattern control command corresponding to the second pin of transfer of data to PC feedback.
Preferably, in the embodiment of the present invention, be the stability that guarantees VGA interface, the 3rd VGA lead-in wire also can be set, the 3rd VGA lead-in wire one end is connected with the ground pin in the 2nd VGA interface (the VGA interface of LCD TV), the other end connects an earth lead, by earth lead ground connection, strengthen the stability of VGA interface.
In the embodiment of the present invention, between signal generator and LCD TV, by VGA line, be connected, and be connected with PC by the USB mouth arranging in VGA line lead-in wire, make by this VGA interface, can be between LCD TV and signal generator transmission video signal, can between LCD TV and PC, the mode by serial communication transmit data again.
Concrete, in the embodiment of the present invention, PC sends test command based on serial communication to signal generator, to LCD TV sending mode control command, signal generator receives after this test instruction, to LCD TV, send the vision signal that shows black and white window picture, make LCD TV show the black and white window picture for contrast test, color analyzer detects the black and white window picture that LCD TV shows, gather the test data for contrast test, this test data comprises white brightness value L V0 corresponding to L0 point in black and white window picture, and black L1 in black and white window picture, L2, L3, the brightness value L V1 that L4 each point is corresponding, LV2, LV3, LV4, L0 wherein, L1, L2, in L3 and L4 LCD TV, in black and white window picture, be fixed for the point of contrast test, color analyzer collects after test data, by USB print line, test data is fed back to PC, PC utilizes the test data receiving, according to formula C=LV0/ (LV1+LV2+LV3+LV4)/4, C is contrast value, finally calculate the contrast value of LCD TV.
The contrast test macro that the embodiment of the present invention provides, the mode of data processing equipment based on serial communication, make signal generator control display unit 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 access the contrast value of this display unit to be tested by this test data, realize unartificial mode and treated the test of test display apparatus contrast, test process is simple, and reduced error probability, improved contrast measuring accuracy, and improved efficiency.
Embodiment bis-
The process that the embodiment of the present invention two is carried out contrast test in conjunction with practical application to above-mentioned contrast test macro is elaborated.
Concrete, the process of test LCD TV contrast of take in the embodiment of the present invention is carried out as example, illustrates, and does not certainly regard it as and is limited.
First, provide a contrast test macro.
Concrete, in the embodiment of the present invention, contrast test macro comprises PC, signal generator, LCD TV and the color analyzer that contrast testing software is installed, with serial ports, turn USB line, USB print line and RS232 line LCD TV, color analyzer and signal generator are connected with the PC that contrast testing software is installed respectively, and make by VGA interface, to be connected between signal generator and LCD TV.
In the embodiment of the present invention, at PC end, serial ports is installed and is turned USB debugging board driver, color analyzer driver, by unified LCD TV, color analyzer and the signal generator controlled of the contrast testing software on PC, between PC and LCD TV, color analyzer and signal generator, based on serial communication mode, carry out the transmission of instruction.
Secondly, each device in operation contrast test macro, is sent and is used to indicate test instruction and the pattern control command that display unit to be tested shows black and white window picture by PC simultaneously.
Concrete, in the embodiment of the present invention, complete after the hardware connection of contrast test macro, the serial ports transmission rate that LCD TV and signal generator use is set, LCD TV, signal generator and color analyzer is completed to the operation that powers on, and color analyzer is proofreaied and correct.
The PC of contrast testing software is installed, based on serial communication mode, transmission is used to indicate LCD TV and shows the test instruction for black and white window picture, signal generator is carried out the test instruction receiving, according to this test instruction, transmit after vision signal to LCD TV, LCD TV is carried out the demonstration of black and white window picture.
Again, gather the test data for contrast test.
Concrete, in the embodiment of the present invention by color analyzer collecting test data, the test data gathering comprises white brightness value L V0 corresponding to L0 point in black and white window picture, and black L1, L2 in black and white window picture, L3, brightness value L V1, LV2, LV3, LV4 that L4 each point is corresponding, the point that is wherein fixed for contrast test in L0, L1, L2, L3 and L4 LCD TV in black and white window picture, color analyzer feeds back to PC by the test data collecting.
Finally, carry out the calculating of contrast, complete contrast test.
Concrete, in the embodiment of the present invention, PC end receives that after the test data for contrast test, according to formula C=LV0/ (LV1+LV2+LV3+LV4)/4, C is contrast value according to formula, finally calculates the contrast value of LCD TV.
Further, in the embodiment of the present invention, can back up the LCD TV contrast value calculating, after completing contrast test process, according to the contrast value calculating, unified definite LCD TV up to specification and the LCD TV falling short of specifications.
The contrast method of testing that the embodiment of the present invention provides, mode based on serial communication, control display unit to be tested and show the black and white window picture for contrast test, in collection black and white window picture, for carrying out the test data of contrast test, by this test data, carry out the calculating of contrast value, can access the contrast value of this display unit to be tested, realize the contrast test of unartificial mode, reduce error probability, improved contrast measuring accuracy, and improved efficiency.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (8)
1. a contrast test macro, is characterized in that, comprising: data processing equipment, there is display unit to be tested, data acquisition unit and the signal generator of Video Graphics Array VGA interface, wherein,
Described data processing equipment is for sending test instruction to described signal generator, and by described VGA interface corresponding to the pin of transfer of data, to described display unit sending mode control command to be tested, described pattern control command is used to indicate described display unit to be tested and shows different image modes;
Described signal generator is used for according to described test instruction, by the pin showing corresponding to image in described VGA interface, to described display unit to be tested, send vision signal, described vision signal is used to indicate described display unit to be tested and shows the black and white window picture for contrast test;
Described display unit to be tested according to described vision signal and described pattern control command, shows the black and white window picture for contrast test under the image mode of present mode control command indication;
Described data acquisition unit gathers the test data for contrast test in described black and white window picture, and described test data is transferred to described data processing equipment;
Described data processing equipment carries out contrast calculating to the test data receiving, and obtains the contrast value of described display unit to be tested correspondence under the image mode of present mode control command indication.
2. contrast test macro as claimed in claim 1, is characterized in that, this system also comprises first data transmission line and the second data line, wherein,
Described data processing equipment is by described first data transmission line, and in described VGA interface corresponding to the first pin of transfer of data, to described display unit sending mode control command to be tested;
Described display unit to be tested is by described the second data line, and in described VGA interface corresponding to the second pin of transfer of data, to described data processing equipment, send feedback command.
3. contrast test macro as claimed in claim 2, it is characterized in that, this system also comprises a VGA lead-in wire with USB converting interface and the 2nd VGA lead-in wire with USB converting interface, and described first data transmission line and described the second data line are that serial ports turns USB line, wherein
The one VGA lead-in wire has USB converting interface one end and connects described first data transmission line, do not there is USB converting interface one end and connect described the first pin, described data processing equipment by a described VGA lead-in wire, described first data transmission line and described the first pin to described display unit sending mode control command to be tested;
The 2nd VGA lead-in wire has USB converting interface one end and connects the second data line, do not have USB converting interface one end and connect described the second pin, described display unit to be tested sends feedback command by described VGA the 2nd VGA lead-in wire, described the second data line and described the second pin to described data processing equipment.
4. contrast test macro as claimed in claim 2 or claim 3, is characterized in that, the 3rd VGA lead-in wire that this system also comprises and is connected corresponding to ground pin in described VGA interface, and described the 3rd VGA lead-in wire connects earth lead, by described earth lead ground connection.
5. contrast test macro as claimed in claim 1, is characterized in that, described data processing equipment is connected by RS232 line with described signal generator.
6. contrast test macro as claimed in claim 1, is characterized in that, described data processing equipment is connected by general-purpose serial bus USB print line with described data acquisition unit.
7. contrast test macro as claimed in claim 1, is characterized in that, described data processing equipment is the personal computer PC that contrast testing software is installed.
8. the contrast test macro as described in claim 1 or 7, is characterized in that, described data acquisition unit is color analyzer.
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| CN105575302A (en) * | 2015-12-18 | 2016-05-11 | 广州视源电子科技股份有限公司 | Display device 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 |
| CN107221275A (en) * | 2017-07-26 | 2017-09-29 | 昆山龙腾光电有限公司 | Display screen contrast detecting system and method |
| CN109600604A (en) * | 2018-11-09 | 2019-04-09 | 歌尔股份有限公司 | Contrast test method, device and computer readable storage medium |
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| CN103686153B (en) | 2016-07-06 |
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