CN103778878A - Display screen brightness level switching sensitivity testing method - Google Patents
Display screen brightness level switching sensitivity testing method Download PDFInfo
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- CN103778878A CN103778878A CN201310551919.5A CN201310551919A CN103778878A CN 103778878 A CN103778878 A CN 103778878A CN 201310551919 A CN201310551919 A CN 201310551919A CN 103778878 A CN103778878 A CN 103778878A
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Abstract
The invention discloses a display screen brightness level switching sensitivity testing method, which is characterized in that the testing method converts brightness variation of a display into voltage variation through a photosensitive sensor, the voltage variation is collected through an oscilloscope, and then the switching time of the display screen brightness level is calculated. The display screen brightness level switching sensitivity testing method has the advantages that 1, the structure is simple, and the detection cost is reduced to the maximum degree; 2, the size is small, and the operation is easy; and 3, the precision is high, and a test value is accurate.
Description
Technical field
The present invention relates to the performance test field of display screen, particularly a kind of display-screen brightness grading switches the method for testing of sensitivity.
Background technology
The brightness degree of display screen switches sensitivity and refers to and receive after brightness regulation instruction when display screen, and the adjusting that can how long complete display brightness reaches stable.
The sensitivity of switching for display-screen brightness grading, traditional method of testing is to send when brightness regulation to display screen, press stopwatch and start timing, when range estimation brightness regulation reach stable after, press manual time-keeping and finish.Display screen receives after brightness regulation instruction, and the adjusting that most modules can complete display brightness in 50ms reaches stable.
But this method of testing is entirely by manual operation, and for the switching sensitivity of Millisecond, error is too large, and the accuracy of test can not be guaranteed.
For the problems referred to above, the method for testing that provides a kind of display-screen brightness grading to switch sensitivity, sensitivity carries out accurately measuring is the problem that prior art need to solve for changing that display-screen brightness grading is cut.
Summary of the invention
Technical matters to be solved by this invention is that the method for testing that provides a kind of display-screen brightness grading to switch sensitivity, to reach the object of being carried out to accurate measurement the response time of display screen.
For achieving the above object, technical scheme of the present invention is, a kind of display-screen brightness grading switches the method for testing of sensitivity, it is characterized in that: described method of testing is by light sensor, the brightness of display to be changed and is converted into change in voltage, then after change in voltage being gathered by oscillograph, calculates the switching time of display-screen brightness grading.
Described method of testing is to switch on power after display screen connects signal card, and signal card access computer is controlled the brightness degree of display screen; Computer display screen is provided with button and shows region of variation, and button shows that region of variation is provided with light-inductive device, and in the time that computer sends brightness regulation instruction, button shows that region of variation carries out black and white and switches the starting time that collection brightness degree switches; The center of display screen is provided with equally light-inductive device and gathers the terminal time that brightness degree switches.
Two lines of described light sensor output are connected respectively to the corresponding CH1 of oscillograph, the CH2 positive and negative end of popping one's head in.
Described method of testing is first adjusted to 0 grade by the brightness of display screen pattern in daytime, and module brightness is white minimum brightness, then by daytime pattern modulating mode be made as discontinuous, the switching time of when test, brightness progression being drawn to 255 calculating display screens; Again the brightness of display screen pattern in daytime is adjusted to 255 grades, module brightness is a white high-high brightness, when test, brightness progression is drawn to the switching time that again calculates display screen switching time of 0 calculating display screen, two times compare and get the sensitivity that maximal value is switched as this display screen grade.
Display-screen brightness grading switches a method of testing for sensitivity, owing to adopting above-mentioned method, the invention has the advantages that: 1, simple in structure, farthest reduce testing cost; 2, volume is little, easy operating; 3, degree of accuracy is high, and test number is accurate.
Embodiment
The present invention is changed the brightness of display to be converted into change in voltage by light sensor, then after change in voltage being gathered by oscillograph, calculates the switching time of display-screen brightness grading.
Display screen is received after brightness regulation order, and brightness meeting changes gradually, and finally stable, the stable initial point collecting with photosensitive sensor unit is as the terminal of timing.Because starting point and the terminal of timing all gather by sensor, the accuracy and reliability of test is far superior to traditional method of testing.Photosensitive sensor unit can change brightness to change into change in voltage.
When test, first opening power, adjusts display screen and signal card required voltage, gives display screen and signal card power supply, and product work is normal, presses signal card and switches a button, makes display screen show white.Signal card can provide for display screen the displays such as white field, Red Square, green field.Then open the debugging interface of computer, (debugging interface is a kind of installation on computers, can with the mutual communication of display screen, send the application software of the functions such as brightness regulation order to display screen) open backlight modulation interface, display screen can normal communication, tunable optical.
By first photosensitive sensor unit, with adhesive tape, the button in debugging interface shows region of variation, and two lines of light sensor output connect respectively the oscillographic CH1 positive and negative end of popping one's head in.By second photosensitive sensor unit with adhesive tape at product Ping center, two lines that light sensor is drawn connect respectively the oscillographic CH2 positive and negative end of popping one's head in.Open oscillograph, display parameter are set, approach the scope that is no more than again screen all over the screen with display graphics and be advisable.
First pattern brightness in daytime is adjusted to 0 grade by debugging interface, module brightness is a white minimum brightness.Again by daytime pattern modulating mode be made as discontinuously, then brightness progression is drawn to 255(discontinuous owing to being provided with, clicking before the button of debugging interface " pattern brightness in daytime ", module brightness be still white field minimum brightness).
Click debugging interface " pattern brightness in daytime " button, play two effects: sending to module that brightness is transferred to the order of 255 grades and makes square frame district below " button show change " occur at once that black and white field switches and change from 0 grade (is square frame district pressing " pattern brightness in daytime " if black button becomes white after touching the button; Otherwise, after touching the button, become black.）
Click after the button of debugging interface " pattern brightness in daytime ", the brightness meeting of display screen becomes according to the order sending, there is black and white field and switch variation in " button shows variation " square frame district below, these two luminance transformation can be passed to oscillographic CH1 for corresponding change in voltage by the photosensitive sensor unit change of team, CH2 passage is shown as voltage waveform at once.The starting point that the voltage waveform of CH1 is changed, as time zero, using the initial point stable wave form varies of CH2 as timing end point, is measured the time of starting point and terminal with oscillographic cursor, brightness degree switches sensitivity, is designated as t1.
Then first pattern brightness in daytime is adjusted to 255 grades, module brightness is a white high-high brightness.Again by daytime pattern modulating mode be made as discontinuously, then brightness progression is drawn to 0.Repeat above-mentioned steps, the time of recording is designated as t2.Get in t1 and t2 larger, be this product brightness degree switch sensitivity.
Above the present invention is exemplarily described; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as the various improvement that adopted technical solution of the present invention to carry out, or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (4)
1. a display-screen brightness grading switches the method for testing of sensitivity, it is characterized in that: described method of testing is by light sensor, the brightness of display to be changed and is converted into change in voltage, then after change in voltage being gathered by oscillograph, calculates the switching time of display-screen brightness grading.
2. a kind of display-screen brightness grading according to claim 1 switches the method for testing of sensitivity, it is characterized in that: described method of testing is to switch on power after display screen connects signal card, and signal card access computer is controlled the brightness degree of display screen; Computer display screen is provided with button and shows region of variation, and button shows that region of variation is provided with light-inductive device, and in the time that computer sends brightness regulation instruction, button shows that region of variation carries out black and white and switches the starting time that collection brightness degree switches; The center of display screen is provided with equally light-inductive device and gathers the terminal time that brightness degree switches.
3. a kind of display-screen brightness grading according to claim 2 switches the method for testing of sensitivity, it is characterized in that: two lines of described light sensor output are connected respectively to the corresponding CH1 of oscillograph, the CH2 positive and negative end of popping one's head in.
4. a kind of display-screen brightness grading according to claim 2 switches the method for testing of sensitivity, it is characterized in that: described method of testing is first adjusted to 0 grade by the brightness of display screen pattern in daytime, module brightness is a white minimum brightness, again by daytime pattern modulating mode be made as discontinuous, the switching time of when test, brightness progression being drawn to 255 calculating display screens; Again the brightness of display screen pattern in daytime is adjusted to 255 grades, module brightness is a white high-high brightness, when test, brightness progression is drawn to the switching time that again calculates display screen switching time of 0 calculating display screen, two times compare and get the sensitivity that maximal value is switched as this display screen grade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310551919.5A CN103778878A (en) | 2013-11-08 | 2013-11-08 | Display screen brightness level switching sensitivity testing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310551919.5A CN103778878A (en) | 2013-11-08 | 2013-11-08 | Display screen brightness level switching sensitivity testing method |
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| CN103778878A true CN103778878A (en) | 2014-05-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108120586A (en) * | 2017-12-26 | 2018-06-05 | 中航华东光电有限公司 | Dimming curve automatic testing equipment |
| CN112505952A (en) * | 2020-11-18 | 2021-03-16 | 海博瑞电子(江苏)有限公司 | Simple test method for response time of liquid crystal display screen |
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| CN101211528A (en) * | 2006-12-29 | 2008-07-02 | 探矽光电科技股份有限公司 | Apparatus and method for measuring response time of gray scale to gray scale conversion |
| KR20090007165A (en) * | 2007-07-13 | 2009-01-16 | 엘지디스플레이 주식회사 | Apparatus and method for improving response speed of liquid crystal display |
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Patent Citations (3)
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| CN1673810A (en) * | 2005-04-19 | 2005-09-28 | 浙江大学 | Liquid crystal display response time electrooptical automatic measuring instrument |
| CN101211528A (en) * | 2006-12-29 | 2008-07-02 | 探矽光电科技股份有限公司 | Apparatus and method for measuring response time of gray scale to gray scale conversion |
| KR20090007165A (en) * | 2007-07-13 | 2009-01-16 | 엘지디스플레이 주식회사 | Apparatus and method for improving response speed of liquid crystal display |
Non-Patent Citations (2)
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| 幕建伟，姚军，吕颖琦: "基于双探头的新型液晶显示器响应时间测量方法的研究", 《光电子.激光》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108120586A (en) * | 2017-12-26 | 2018-06-05 | 中航华东光电有限公司 | Dimming curve automatic testing equipment |
| CN112505952A (en) * | 2020-11-18 | 2021-03-16 | 海博瑞电子(江苏)有限公司 | Simple test method for response time of liquid crystal display screen |
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Application publication date: 20140507 |