CN204463781U - Display panel luminance spectrum analytical equipment - Google Patents
Display panel luminance spectrum analytical equipment Download PDFInfo
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- CN204463781U CN204463781U CN201520149559.0U CN201520149559U CN204463781U CN 204463781 U CN204463781 U CN 204463781U CN 201520149559 U CN201520149559 U CN 201520149559U CN 204463781 U CN204463781 U CN 204463781U
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Abstract
The utility model relates to a kind of display panel luminance spectrum analytical equipment, it comprising display, also synchronously converting the luminance sensor of digital signal, the embedded processing module for by time domain luma digit signal intensity being frequency domain luma digit signal to for the luminance signal of Real-time Collection display panel to be measured, the signal output part of luminance sensor connects the signal input part of embedded processing module, and the display output terminal of embedded processing module connects the display input end of display.The utility model can simulate the perception of human eye to surround lighting, measures at a high speed the luminance signal of display panel, provides detailed luminance spectrum analysis, thus finds out the reason that scintillation appears in display panel fast.
Description
Technical field
The utility model relates to display panel detection technique field, is specifically related to a kind of display panel luminance spectrum analytical equipment.
Background technology
Along with the development of science and technology, the display effect of people to display panel proposes more and more higher requirement, and Flicker (flicker) is as a key factor of restriction display panel display effect, and it characterizes the flashing state of display panel brightness.The reason producing Flicker phenomenon has multiple: the digital circuit supply voltage Vdd of such as screen refresh rate, turnover voltage symmetry, display panel to be measured supplies instability, PWM (pulse-length modulation) frequency etc., flicker frequency corresponding to each reason is all different, the reason to cause flicker can be inferred by the frequency spectrum analyzing scintillation spectrum, thus find out the reason that Flicker phenomenon appears in display panel fast, thus improve display panel display quality detection efficiency.
At present, the method of assessment display panel Flicker has the many measuring methods such as FMA (Flicker ModulationAmplitude), JEITA (Japan Electronics and Information TechnologyIndustries Association), VESA (Video Electronics StandardsAssociation), these measuring methods all can only provide a Flicker value, concrete frequency spectrum breath can not be provided, thus the reason specifically causing Flicker phenomenon can not be judged.
Utility model content
The purpose of this utility model is to provide a kind of display panel luminance spectrum analytical equipment, this device can simulate the perception of human eye to surround lighting, measure at a high speed the luminance signal of display panel, detailed luminance spectrum analysis is provided, thus find out the reason that scintillation appears in display panel fast.
For achieving the above object, display panel luminance spectrum analytical equipment designed by the utility model, it is characterized in that: it comprising display, also synchronously converting the luminance sensor of digital signal, the embedded processing module for by time domain luma digit signal intensity being frequency domain luma digit signal to for the luminance signal of Real-time Collection display panel to be measured, wherein, the signal output part of described luminance sensor connects the signal input part of embedded processing module, and the display output terminal of embedded processing module connects the display input end of display.
The utility model has following beneficial effect:
1) the utility model can simulate the perception of human eye to surround lighting by luminance sensor, the luminance signal of Real-time Collection display panel to be measured, ensure that the utility model scintillation precision of analysis;
2) the utility model can provide the detailed frequency spectrum flicker information of display panel display frame to be measured, the reason to cause flicker can be inferred by analysis spectrum response curve, thus find out the reason that scintillation appears in display panel fast, thus improve display panel display quality and detection efficiency.
Accompanying drawing explanation
Fig. 1 is the structured flowchart in the utility model.
Wherein, 1-luminance sensor, 2-embedded processing module, 3-display, 4-communication interface, 5-display panel to be measured, 6-host computer, 7-picture signal generator.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Liquid crystal display flicker and brightness are the indexs of liquid crystal display, can simulate the sensitometric characteristic of human eye to surround lighting, can reflect the brightness of screen to human eye really, accurate analysis brightness analysis, can the corresponding exception of quick position, save and analyze and servicing time, improve maintenance efficiency.Human eye glimmers to the corresponding corresponding one group of stable spectrum signature liquid crystal display when certain screen characteristics occurs abnormal time of each screen characteristics of the normal liquid crystal display of spectrum analysis scope of brightness human eye sensitivity simultaneously and brightness is an important indicator of liquid crystal display, luminance sensor 1 can simulate the sensitometric characteristic of human eye to surround lighting, the brightness of screen to human eye can be reflected really, accurate analysis brightness.
Display panel luminance spectrum analytical equipment designed by the utility model, as shown in Figure 1, it comprising display 3, also synchronously converting the luminance sensor 1 of digital signal, the embedded processing module 2 for by time domain luma digit signal intensity being frequency domain luma digit signal to for the luminance signal of Real-time Collection display panel 5 to be measured, wherein, the signal output part of described luminance sensor 1 connects the signal input part of embedded processing module 2, and the display output terminal of embedded processing module 2 connects the display input end of display 3
In technique scheme, it also comprises the communication interface 4 (serial ports) for connecting host computer 6, described communication interface 4 is connected with the communication ends of embedded processing module 2, and host computer 6 is man-machine interface, and operating personnel control the course of work of embedded processing module 2 by host computer 6.
In technique scheme, described luminance sensor 1 is just to the display surface of display panel 5 to be measured.Distance range between described luminance sensor 1 and the display surface of display panel to be measured 5 is 4 ~ 8cm.The directional light of display panel 5 to be measured responded to by luminance sensor 1.Such scheme can prevent the brightness impression accuracy of stray light luminance sensor 1.
In technique scheme, the sample rate of described luminance sensor 1 is greater than the twice of display panel 5 backlighting frequency to be measured.
In technique scheme, the sample rate of described luminance sensor 1 is greater than 2MHZ.Sampling rate is higher, and the integrality of signal is better, and the sample rate of luminance sensor 1 is greater than 2MHZ (i.e. the twice of display panel 5 backlighting frequency to be measured) guarantee display panel luminance spectrum precision of analysis.Analyst can analyze the spectrum signature of higher passage of scintillation light such as backlight etc. that pulse-length modulation drives from wider spectral range.The utility model can demonstrate screen intensity spectrum signature in real time.By carrying out following analysis to these spectrum signatures, can the corresponding exception of quick position, save and analyze and servicing time, improve maintenance efficiency.
Utilize a display panel luminance spectrum analytical approach for above-mentioned display panel luminance spectrum analytical equipment, it comprises following feature:
Step 1: display panel 5 to be measured lighted by picture signal generator (PG box) 7;
Step 2: towards the luminance sensor 1 of display panel 5 to be measured, the luminance signal of Real-time Collection display panel 5 to be measured, and convert time domain luma digit signal to;
Step 3: luminance sensor 1 by above-mentioned time domain luma digit Signal transmissions to embedded processing module 2, time domain luma digit signal is transformed to frequency domain luma digit signal (simultaneously to brightness and flicker sensitive, luminance spectrum signal is in the spectrum analysis scope of human eye sensitivity to human eye) by existing Fast Fourier Transform (FFT) mode by described embedded processing module 2;
Step 4: the luminance signal spectral response curve generating display panel to be measured according to above-mentioned frequency domain luma digit signal in embedded processing module 2, contrasts the luminance signal spectral response curve of above-mentioned display panel to be measured and the luminance signal spectral response curve of standard;
Corresponding one of each reason causing display panel 5 to be measured to produce scintillation characterizes abnormal frequency range, in above-mentioned spectral response curve comparison process, each abnormal frequency range frequency range of characterizing exception corresponding to the luminance signal spectral response curve of standard that characterize of the spectral response curve of display panel to be measured is contrasted, if the difference in magnitude in two spectral response curves in each corresponding frequency range characterizing exception is all within the normal amplitude difference scope preset, then illustrate that display is normal, if there have a corresponding difference in magnitude characterized in abnormal frequency range to be greater than default normal amplitude in two spectral response curves to be poor, then illustrate that display panel 5 to be measured shows and abnormal there is scintillation (the corresponding corresponding one group of stable spectrum signature of each screen characteristics of normal liquid crystal display, when certain screen characteristics occurs abnormal time, corresponding spectrum signature just there will be exception),
Namely the abnormal cause corresponding to frequency range that difference in magnitude is greater than default normal amplitude difference is the reason that display panel 5 to be measured produces scintillation.
In technique scheme, the reason of described generation scintillation comprises the screen refresh rate exception of display panel to be measured, the turnover voltage symmetry digital circuit supply voltage VDD that is abnormal, display panel to be measured of display panel to be measured supplies pulse-length modulation (PWM that is unstable, display panel to be measured, Pulse Width Modulation) frequency anomaly, above-mentioned various exception is specific one frequency range all corresponding in above-mentioned spectral response curve.The hardware fault causing this exception can be found out rapidly according to above-mentioned exception.
In technique scheme, the result of spectrum analysis of display panel 5 to be measured is transferred to display 3 and shows by described embedded processing module 2, is transferred to host computer 6 simultaneously.
The content that this instructions is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (6)
1. a display panel luminance spectrum analytical equipment, it is characterized in that: it comprises display (3), luminance signal for Real-time Collection display panel to be measured (5) also synchronously converts the luminance sensor (1) of digital signal to, for by time domain luma digit signal intensity being the embedded processing module (2) of frequency domain luma digit signal, wherein, the signal output part of described luminance sensor (1) connects the signal input part of embedded processing module (2), the display output terminal of embedded processing module (2) connects the display input end of display (3).
2. display panel luminance spectrum analytical equipment according to claim 1, is characterized in that: it also comprises the host computer (6) be connected with the communication ends of embedded processing module (2) by communication interface (4).
3. display panel luminance spectrum analytical equipment according to claim 1, is characterized in that: described luminance sensor (1) is just to the display surface of display panel to be measured (5).
4. display panel luminance spectrum analytical equipment according to claim 3, is characterized in that: the distance range between the display surface of described luminance sensor (1) and display panel to be measured (5) is 4 ~ 8cm.
5. display panel luminance spectrum analytical equipment according to claim 1, is characterized in that: the sample rate of described luminance sensor (1) is greater than the twice of display panel to be measured (5) backlighting frequency.
6. display panel luminance spectrum analytical equipment according to claim 5, is characterized in that: the sample rate of described luminance sensor (1) is greater than 2MHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520149559.0U CN204463781U (en) | 2015-03-17 | 2015-03-17 | Display panel luminance spectrum analytical equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520149559.0U CN204463781U (en) | 2015-03-17 | 2015-03-17 | Display panel luminance spectrum analytical equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104700759A (en) * | 2015-03-17 | 2015-06-10 | 武汉精测电子技术股份有限公司 | Device and method for analyzing brightness spectrum of display panel |
| CN108614366A (en) * | 2018-03-14 | 2018-10-02 | 昆山龙腾光电有限公司 | The measuring device of display panel |
| CN111486950A (en) * | 2020-04-20 | 2020-08-04 | Oppo广东移动通信有限公司 | Ambient light detection method, ambient light detection device, electronic apparatus, and storage medium |
-
2015
- 2015-03-17 CN CN201520149559.0U patent/CN204463781U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104700759A (en) * | 2015-03-17 | 2015-06-10 | 武汉精测电子技术股份有限公司 | Device and method for analyzing brightness spectrum of display panel |
| CN104700759B (en) * | 2015-03-17 | 2017-09-22 | 武汉精测电子技术股份有限公司 | Display panel luminance spectrum analytical equipment and analysis method |
| CN108614366A (en) * | 2018-03-14 | 2018-10-02 | 昆山龙腾光电有限公司 | The measuring device of display panel |
| CN108614366B (en) * | 2018-03-14 | 2021-05-25 | 昆山龙腾光电股份有限公司 | Measuring device of display panel |
| CN111486950A (en) * | 2020-04-20 | 2020-08-04 | Oppo广东移动通信有限公司 | Ambient light detection method, ambient light detection device, electronic apparatus, and storage medium |
| WO2021213016A1 (en) * | 2020-04-20 | 2021-10-28 | Oppo广东移动通信有限公司 | Ambient light detection method and device, electronic apparatus, and storage medium |
| CN111486950B (en) * | 2020-04-20 | 2022-04-19 | Oppo广东移动通信有限公司 | Ambient light detection method, ambient light detection device, electronic apparatus, and storage medium |
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Address after: 430070 Hubei City, Hongshan Province, South Lake Road, No. 53, Hongshan Venture Center, building on the 4 floor, No. Patentee after: Wuhan fine test electronics group Limited by Share Ltd Address before: 430070 Hubei City, Hongshan Province, South Lake Road, No. 53, Hongshan Venture Center, building on the 4 floor, No. Patentee before: Wuhan Jingce Electronic Technology Co., Ltd. |