CN103267627A - Display panel flicker tester and flicker degree acquisition method - Google Patents
Display panel flicker tester and flicker degree acquisition method Download PDFInfo
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Abstract
The invention discloses a display panel flicker tester and a flicker degree acquisition method. The display panel flicker tester comprises a photovoltaic conversion circuit, a micro-control circuit and a display module, wherein the photovoltaic conversion circuit generates an analog electrical signal according to the brightness of the display panel; the micro-control circuit is connected with the photovoltaic conversion circuit to convert the analog electrical signal into a digital signal and calculate to obtain the flicker degree of the display panel according to the digital signal; and the display module is connected with the micro-control circuit for displaying the flicker degree of the display panel. The display panel flicker tester provided by the invention has the advantages of small volume and low cost and is more suitable for being installed and popularized on a large-scale production line, and meanwhile, the flicker degree of the display panel can be quantitatively measured.
Description
Technical field
The present invention relates to flat panel display, particularly a kind of flicker of display panel analyzer and flicker degree acquisition methods.
Background technology
For flat-panel monitor, can be because a variety of causes produces film flicker.For example, for display panels, when display frame, pixel voltage can be twisted because of the upset of scanning voltage, make display frame always have flicker (flicker) phenomenon to a certain degree, and scintillation can cause visual fatigue to the user when serious, and therefore every display panel all needs flicker is measured and adjusted before dispatching from the factory.
At present, can realize the glimmering equipment of quantitative measurment mostly is the universal optical equipment of import greatly.Usually, general optical device can be measured multinomial optical parametric, also can measure simultaneously display panel flicker.Yet, general optical device need be measured multiple optical parametric, therefore it is equipped with complicated optical system, test cell, test cell mobile system and huge device framework etc. usually, make general optical device unit price costliness, build difficulty, be unsuitable for producing the line large-scale promotion, and can't realize multimetering.
Therefore, to producing each piece display panel of large-scale production on the line, most of producers adopt that the quantitative measurment of sampling observation minority is most adopts visual examination more, perhaps even abandon quantitative measurment and all adopt the visual examination mode.But the standard of visual examination can't accurately be unified, and can cause certain omission, severe judgement and false retrieval unavoidably.Along with the raising day by day that people require display effect, the client is also more high originally to the requirement of flicker, therefore be necessary produce line promote can the quantitative measurment flicker measuring instrument.Therefore be necessary to develop a kind of simple in structure, cheap and be easy to produce line installs can the quantitative measurment flicker measuring instrument.
Summary of the invention
The invention provides a kind of flicker of display panel analyzer and flicker degree acquisition methods, install convenient, cheap and can the quantitative measurment flicker of display panel to reach, can be in the purpose of producing large-scale promotion on the line thereby realize.
For solving above-mentioned technology for topic, the invention provides a kind of flicker of display panel analyzer, comprising:
One photoelectric switching circuit produces an analog electrical signal according to the briliancy of display panel;
One micro-control circuit is connected with described photoelectric switching circuit, described analog electrical signal is converted into digital signal and calculates the flicker degree of described display panel according to described digital signal;
One display module is connected with described micro-control circuit, is used for showing the flicker degree of described display panel.
Optionally, in described flicker of display panel analyzer, described photoelectric commutator is the EL7900 photoelectric commutator.
Optionally, in described flicker of display panel analyzer, described micro-control circuit is the C8051F360 micro-control circuit.
Optionally, in described flicker of display panel analyzer, described display module is charactron.
Optionally, in described flicker of display panel analyzer, described charactron is the SR430402K charactron.
Optionally, in described flicker of display panel analyzer, described micro-control circuit comprises:
Signal conversion unit is used for described analog electrical signal is converted into digital signal;
Data processing unit is for the flicker degree that calculates described display panel according to digital signal.
Optionally, in described flicker of display panel analyzer, described data processing unit comprises according to the step that described digital signal calculates the flicker degree of display panel:
Described data processing unit is gathered data every time t from described signal processing unit, continuous acquisition N data are one-period, and relatively N data draw data maximal value and the data minimum value in the one-period;
Described data processing unit calculates the flicker degree of one-period according to following formula;
Flicker degree (%)=(Vmax-Vmin)/[(Vmax+Vmin)/2] * 100 (%);
Described data processing unit repeats above-mentioned steps, calculates the flicker degree in M cycle continuously, and obtains the mean value of described M cycle flicker degree as the flicker degree of display panel;
Wherein, N is the natural number more than or equal to 2, and Vmax is the data maximal value in the one-period, and Vmin is the data minimum value in the one-period.
Accordingly, the present invention also provides a kind of flicker degree acquisition methods of display panel, comprising:
Adopt photoelectric switching circuit to produce an analog electrical signal according to the briliancy of display panel;
The employing micro-control circuit is converted into digital signal with described analog electrical signal and calculates the flicker degree of described display panel according to described digital signal;
Adopt display module to show the flicker degree of described display panel.
Optionally, in the flicker degree acquisition methods of described display panel, the step that calculates the flicker degree of display panel according to described digital signal comprises:
Gather data every time t from described digital signal, continuous acquisition N data are one-period, and relatively N data draw data maximal value and the data minimum value in the one-period;
Calculate the flicker degree of one-period according to following formula;
Flicker degree (%)=(Vmax-Vmin)/[(Vmax+Vmin)/2] * 100 (%);
Repeat above-mentioned steps, calculate the flicker degree in M cycle continuously, and obtain the mean value of described M cycle flicker degree as the flicker degree of display panel;
Wherein, N is the natural number more than or equal to 2, and Vmax is the data maximal value in the one-period, and Vmin is the data minimum value in the one-period.
Optionally, in the flicker degree acquisition methods of described display panel, described t is 0.5ms ~ 0.7ms, and described N is 45 ~ 90, and described M is 10 ~ 20.
Flicker of display panel analyzer of the present invention comprises a photoelectric switching circuit, a micro-control circuit and a display module.Described photoelectric switching circuit produces an analog electrical signal according to the briliancy of display panel, and send described analog electrical signal to described micro-control circuit, described micro-control circuit is converted into described analog electrical signal digital signal and calculates the flicker degree of described display panel according to described digital signal, and passes to described display module degree of flicker is shown.Described flicker of display panel analyzer includes only photoelectric switching circuit, a micro-control circuit and a display module, need not to dispose complicated optical system and bulky device framework, do not need external computer yet, dwindled equipment volume, reduce equipment price, can finish the measurement of flicker degree simultaneously.Because flicker of display panel analyzer volume of the present invention is little, cheap, be more suitable for installing and promoting at large-scale production line flicker degree that simultaneously can the quantitative measurment display panel than general optical device.
Description of drawings
Fig. 1 is the structural representation of the flicker of display panel analyzer of one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in more detail, has wherein represented the preferred embodiments of the present invention, should the described those skilled in the art of understanding can revise the present invention described here, and still realize advantageous effects of the present invention.Therefore, following description is appreciated that extensively knowing for those skilled in the art, and not as limitation of the present invention.
As shown in Figure 1, the flicker of display panel analyzer 100 of one embodiment of the invention comprises: a photoelectric switching circuit 101, a micro-control circuit 102 and a display module 103.Described micro-control circuit 102 is connected with photoelectric switching circuit 101, and described display module 103 is connected with micro-control circuit 102.Described photoelectric switching circuit 101 produces an analog electrical signal according to the briliancy of display panel 200, and described analog electrical signal is passed to described micro-control circuit 102.Described micro-control circuit 102 comprises a signal conversion unit 1021 and a data processing unit 1022.Described signal conversion unit 1021 is used for described analog electrical signal is converted into digital signal, and described data processing unit 1022 is used for calculating according to described digital signal the flicker degree of display panel 200.Described flicker of display panel analyzer 100 includes only described photoelectric switching circuit 101, micro-control circuit 102 and 103 3 unit of display module, and is simple in structure, need not the optical system of configuration structure complexity and huge device framework, and build is brief, the convenient installation.
Wherein, described photoelectric switching circuit 101 for example is the EL7900 photoelectric commutator.Described micro-control circuit 102 for example is the C8051F360 micro-control circuit.Described display module 103 is charactron for example, is the SR430402K charactron in the present embodiment.Described EL7900 photoelectric commutator, EL7900 photoelectric commutator and SR430402K charactron all are the ripe existing electron device of exploitation, and be cheap.
In the present embodiment, described data processing unit 1022 calculates display panel 200 according to described digital signal the concrete computation process of flicker degree is as follows:
Described data processing unit 1022 is gathered data every time t from described signal processing unit 1021, continuous acquisition N data are one-period, and relatively N data draw data maximal value and the data minimum value in the one-period;
Described data processing unit 1022 calculates the flicker degree of one-period according to following formula;
Flicker degree (%)=(Vmax-Vmin)/[(Vmax+Vmin)/2] * 100 (%) (1)
Described data processing unit 1022 repeats above-mentioned steps, calculates the flicker degree in M cycle continuously, and obtains the mean value of described M cycle flicker degree as the flicker degree of display panel 200;
Wherein, N is the natural number more than or equal to 2, and Vmax is the data maximal value in the one-period, and Vmin is the data minimum value in the one-period.Preferably, described t is 0.5ms ~ 0.7ms, and described N is 45 ~ 90, and described M is 10 ~ 20.
Continuation is with reference to figure 1, and the present invention also provides a kind of flicker degree acquisition methods of display panel, specifically may further comprise the steps:
Step 1: adopt photoelectric switching circuit 101 to produce an analog electrical signal according to the briliancy of display panel 200;
Step 2: adopt micro-control circuit 102 that described analog electrical signal is converted into digital signal and calculates the flicker degree of described display panel 200 according to described digital signal, concrete computation process is as follows:
Gather data every time t from described digital signal, continuous acquisition N data are one-period, and relatively N data draw data maximal value Vmax and the data minimum value Vmin in the one-period, preferably, described t is 0.5ms ~ 0.7ms, and described N is 45 ~ 90, and described M is 10 ~ 20;
Calculate the flicker degree of one-period according to formula (1);
Repeat above-mentioned steps one and step 2, calculate the flicker degree in M cycle continuously, and obtain the mean value of described M cycle flicker degree as the flicker degree of display panel;
Wherein, N is the natural number more than or equal to 2;
At last, adopt display module 103 to show the flicker degree of described display panel 200.
In sum, flicker of display panel analyzer of the present invention comprises photoelectric switching circuit, micro-control circuit and three unit of display module, does not comprise that baroque optical system and bulky device framework are simple in structure, and framework is convenient.Described photoelectric switching circuit produces an analog electrical signal according to the briliancy of display panel, and send described analog electrical signal to described micro-control circuit, described micro-control circuit is converted into described analog electrical signal digital signal and accurately calculates the flicker degree of described display panel according to described digital signal, and shows by the flicker degree that described display module will accurately be measured.Therefore, flicker of display panel analyzer provided by the present invention because volume is little, cheap, is more suitable for installing and promoting at large-scale production line, simultaneously flicker degree that also can the quantitative measurment display panel.
Obviously, those skilled in the art can carry out various changes and modification to invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these revise and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these change and modification.
Claims (10)
1. flicker of display panel analyzer comprises:
One photoelectric switching circuit produces an analog electrical signal according to the briliancy of display panel;
One micro-control circuit is connected with described photoelectric switching circuit, described analog electrical signal is converted into digital signal and calculates the flicker degree of described display panel according to described digital signal;
One display module is connected with described micro-control circuit, is used for showing the flicker degree of described display panel.
2. flicker of display panel analyzer as claimed in claim 1 is characterized in that, described photoelectric commutator is the EL7900 photoelectric commutator.
3. flicker of display panel analyzer as claimed in claim 1 is characterized in that, described micro-control circuit is the C8051F360 micro-control circuit.
4. flicker of display panel analyzer as claimed in claim 1 is characterized in that, described display module is charactron.
5. flicker of display panel analyzer as claimed in claim 4 is characterized in that, described charactron is the SR430402K charactron.
6. flicker of display panel analyzer as claimed in claim 1 is characterized in that, described micro-control circuit comprises:
Signal conversion unit is used for described analog electrical signal is converted into digital signal;
Data processing unit is for the flicker degree that calculates described display panel according to described digital signal.
7. flicker of display panel analyzer as claimed in claim 6 is characterized in that, described data processing unit comprises according to the step that described digital signal calculates the flicker degree of display panel:
Described data processing unit is gathered data every time t from described signal processing unit, continuous acquisition N data are one-period, and relatively N data draw data maximal value and the data minimum value in the one-period;
Described data processing unit calculates the flicker degree of one-period according to following formula;
Flicker degree (%)=(Vmax-Vmin)/[(Vmax+Vmin)/2] * 100 (%);
Described data processing unit repeats above-mentioned steps, calculates the flicker degree in M cycle continuously, and obtains the mean value of described M cycle flicker degree as the flicker degree of display panel;
Wherein, N is the natural number more than or equal to 2, and Vmax is the data maximal value in the one-period, and Vmin is the data minimum value in the one-period.
8. the flicker degree acquisition methods of a display panel is characterized in that, comprising:
Adopt photoelectric switching circuit to produce an analog electrical signal according to the briliancy of display panel;
The employing micro-control circuit is converted into digital signal with described analog electrical signal and calculates the flicker degree of described display panel according to described digital signal;
Adopt display module to show the flicker degree of described display panel.
9. the flicker degree acquisition methods of display panel as claimed in claim 8 is characterized in that, the step that calculates the flicker degree of display panel according to described digital signal comprises:
Gather data every time t from described digital signal, continuous acquisition N data are one-period, and relatively N data draw data maximal value and the data minimum value in the one-period;
Calculate the flicker degree of one-period according to following formula;
Flicker degree (%)=(Vmax-Vmin)/[(Vmax+Vmin)/2] * 100 (%);
Repeat above-mentioned steps, calculate the flicker degree in M cycle continuously, and obtain the mean value of described M cycle flicker degree as the flicker degree of display panel;
Wherein, N is the natural number more than or equal to 2, and Vmax is the data maximal value in the one-period, and Vmin is the data minimum value in the one-period.
10. the flicker degree acquisition methods of display panel as claimed in claim 9 is characterized in that, described t is 0.5ms ~ 0.7ms, and described N is 45 ~ 90, and described M is 10 ~ 20.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676231A (en) * | 2013-11-08 | 2014-03-26 | 深圳市华星光电技术有限公司 | Method and device for measuring Flicker value of liquid crystal module |
| CN104201187A (en) * | 2014-08-18 | 2014-12-10 | 京东方科技集团股份有限公司 | Organic light emitting diode (OLED) display device |
| CN106125368A (en) * | 2016-08-26 | 2016-11-16 | 深圳市华星光电技术有限公司 | The flicker degree detection device of a kind of display floater and detection method |
| CN107576482A (en) * | 2017-08-31 | 2018-01-12 | 京东方科技集团股份有限公司 | A kind of optical parameter measurement device and its measuring method |
| CN109656037A (en) * | 2019-01-02 | 2019-04-19 | 海的电子科技(苏州)有限公司 | The measurement method of display screen flicker degree based on photodiode |
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| CN110942738A (en) * | 2019-12-04 | 2020-03-31 | 惠州市华星光电技术有限公司 | Measurement device and measurement method for flicker value of display panel |
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| WO2020151465A1 (en) * | 2019-01-25 | 2020-07-30 | 欧普照明股份有限公司 | Detection circuit, apparatus and method for detecting strobing of light source, and photoelectric detection device |
| WO2021128471A1 (en) * | 2019-12-26 | 2021-07-01 | 惠州市华星光电技术有限公司 | Detection device and detection method for measuring flicker degree of display panel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6135329A (en) * | 1984-07-27 | 1986-02-19 | Yokogawa Hewlett Packard Ltd | Measuring device for characteristic of display device |
| CN1928523A (en) * | 2005-09-07 | 2007-03-14 | 精工爱普生株式会社 | Scintillation measuring method of display device and scintillation measuring device |
| JP2010117185A (en) * | 2008-11-11 | 2010-05-27 | Olympus Corp | Device and method for inspecting flaw |
| CN202351556U (en) * | 2011-11-02 | 2012-07-25 | 苏州华兴源创电子科技有限公司 | Device for testing Flicker of liquid crystal module |
| CN202485895U (en) * | 2012-02-17 | 2012-10-10 | 核工业理化工程研究院华核新技术开发公司 | Device for detecting light intensity characteristics of linear light source for color sorter |
-
2012
- 2012-12-14 CN CN2012105457298A patent/CN103267627A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6135329A (en) * | 1984-07-27 | 1986-02-19 | Yokogawa Hewlett Packard Ltd | Measuring device for characteristic of display device |
| CN1928523A (en) * | 2005-09-07 | 2007-03-14 | 精工爱普生株式会社 | Scintillation measuring method of display device and scintillation measuring device |
| JP2010117185A (en) * | 2008-11-11 | 2010-05-27 | Olympus Corp | Device and method for inspecting flaw |
| CN202351556U (en) * | 2011-11-02 | 2012-07-25 | 苏州华兴源创电子科技有限公司 | Device for testing Flicker of liquid crystal module |
| CN202485895U (en) * | 2012-02-17 | 2012-10-10 | 核工业理化工程研究院华核新技术开发公司 | Device for detecting light intensity characteristics of linear light source for color sorter |
Non-Patent Citations (3)
| Title |
|---|
| 潘旭辉 等: "光源的闪烁效应及闪烁的测量方法", 《走近CIE 26TH—中国照明学会（2005）学术年会论文集 》 * |
| 潘旭辉: "平板显示器闪烁评价和测量系统的研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 王纪永 等: "基于频谱分析的光源闪烁评价方法", 《光学工程》 * |
Cited By (17)
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|---|---|---|---|---|
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| CN103676231A (en) * | 2013-11-08 | 2014-03-26 | 深圳市华星光电技术有限公司 | Method and device for measuring Flicker value of liquid crystal module |
| US9892675B2 (en) | 2014-08-18 | 2018-02-13 | Boe Technology Group Co., Ltd. | Organic light-emitting diode display apparatus, display device, and method for testing the organic light-emitting diode display apparatus |
| CN104201187A (en) * | 2014-08-18 | 2014-12-10 | 京东方科技集团股份有限公司 | Organic light emitting diode (OLED) display device |
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| CN106125368A (en) * | 2016-08-26 | 2016-11-16 | 深圳市华星光电技术有限公司 | The flicker degree detection device of a kind of display floater and detection method |
| US10401219B2 (en) | 2017-08-31 | 2019-09-03 | Boe Technology Group Co., Ltd. | Optical parameter measurement device and optical parameter measurement method |
| CN107576482A (en) * | 2017-08-31 | 2018-01-12 | 京东方科技集团股份有限公司 | A kind of optical parameter measurement device and its measuring method |
| CN107576482B (en) * | 2017-08-31 | 2020-06-30 | 京东方科技集团股份有限公司 | Optical parameter measuring device and measuring method thereof |
| CN109656037A (en) * | 2019-01-02 | 2019-04-19 | 海的电子科技(苏州)有限公司 | The measurement method of display screen flicker degree based on photodiode |
| WO2020151465A1 (en) * | 2019-01-25 | 2020-07-30 | 欧普照明股份有限公司 | Detection circuit, apparatus and method for detecting strobing of light source, and photoelectric detection device |
| US11910100B2 (en) | 2019-01-25 | 2024-02-20 | Opple Lighting Co., Ltd. | Detection circuit, device and method for detecting light source flicker, and photoelectric detection device |
| CN110599935A (en) * | 2019-08-26 | 2019-12-20 | 昆山龙腾光电有限公司 | Automatic adjusting device and automatic adjusting method for public voltage |
| CN110942738A (en) * | 2019-12-04 | 2020-03-31 | 惠州市华星光电技术有限公司 | Measurement device and measurement method for flicker value of display panel |
| CN111076812A (en) * | 2019-12-26 | 2020-04-28 | 惠州市华星光电技术有限公司 | Optical brightness measuring system and optical brightness measuring method |
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Application publication date: 20130828 |