CN103592787B - Luminance detection device - Google Patents
Luminance detection device Download PDFInfo
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- CN103592787B CN103592787B CN201310571841.3A CN201310571841A CN103592787B CN 103592787 B CN103592787 B CN 103592787B CN 201310571841 A CN201310571841 A CN 201310571841A CN 103592787 B CN103592787 B CN 103592787B
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- detection device
- probe unit
- pixel
- photosensitive probe
- luminance detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 239000000523 sample Substances 0.000 claims abstract description 49
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 abstract description 8
- 239000004973 liquid crystal related substance Substances 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
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Abstract
The invention provides a kind of luminance detection device, this luminance detection device comprises photosensitive probe unit, signal conversion unit and data-out port; This photosensitive probe unit, for carrying out intensity detection to the pixel of display screen, and is converted to electric signal by the light signal that this pixel sends; This signal conversion unit, probe unit photosensitive with this and this data-out port are connected respectively, for this electric signal being converted to digital signal and being exported by this data-out port by the brightness data of this digital signal as this pixel.The present invention carries out intensity detection by photosensitive probe unit to the pixel of LCD screen, and judge whether this pixel is bright spot according to detecting the signal obtained, avoid the problem that the result of determination that causes due to the subjectivity of tester differs greatly, decrease the error that tester causes due to subjective judgement, and then improve the objectivity of detection and the accuracy of testing result.
Description
Technical field
The present invention relates to display field, particularly relate to a kind of luminance detection device.
Background technology
Due to liquid crystal display (LiquidCrystalDisplay, LCD) there is low diathermaneity, the feature such as volume is light, weight is little and power consumption is low, instead of traditional cathode-ray tube (CRT) (CathodeRayTube gradually, CRT) display, be widely used in the fields such as desktop computer, notebook computer, personal digital assistant (PersonalDigitalAssistant, PDA), mobile phone, TV.
For ensureing the product quality of liquid crystal display, need to detect liquid crystal display before dispatching from the factory, low-light level bright spot refers under complete black picture, but the shinny brightness of whole pixel is very low, or the portion of just pixel is shinny.For these situations, when carrying out liquid crystal display detection, need tester according to criterion, the judgement being no more than standard is vanishing point or small-sized foreign matter badness, and overproof to be judged to bright spot bad.Whether exceed the grade that criterion is directly connected to liquid crystal display, thus determine the benefit of production.
In Thin Film Transistor-LCD industry, low-light level bright spot is acceptable, but, also do not have automatically to detect this low-light level bright spot and to carry out the device of objective judgement at present, because testing staff is different for brightness perception degree, so these judge all with the subjectivity of tester, and the judgement between tester differs greatly, thus causes the not high problem of liquid crystal display bright spot detection accuracy.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: provide a kind of luminance detection device, effectively can solve in prior art the problem causing liquid crystal display bright spot detection accuracy not high due to the subjectivity of testing staff.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of luminance detection device, comprising photosensitive probe unit, signal conversion unit and data-out port;
Described photosensitive probe unit, for carrying out intensity detection to the pixel of display screen, and is converted to electric signal by the light signal that described pixel sends;
Described signal conversion unit, be connected with described photosensitive probe unit and described data-out port respectively, for described electric signal being converted to digital signal and the brightness data of described digital signal as described pixel being exported by described data-out port.
Further, also comprise the main body of barrel-like structure, described photosensitive probe unit is arranged on the bottom surface of described main body.
Further, around described photosensitive probe unit, be also provided with transparent window, by the position of the described photosensitive probe unit of described transparent window adjustment, to make described photosensitive probe unit just to described pixel.
Further, described transparent window is square or circular.
Further, described transparent window is annular, and described photosensitive probe unit is positioned at the center of described transparent window.
Further, described photosensitive probe unit is connected with described signal conversion unit by translucent lead plate.
Further, described data-out port is USB interface.
Further, also comprise input block, processing unit and display unit, described input block is connected with described processing unit, for inputting the operation information of user, described processing unit is connected with described data-out port, for judging according to described digital signal whether described pixel is bright spot, and described display unit is connected with described processing unit, for showing the result after the judgement of described processing unit.
Further, also comprise power supply, for providing voltage to described luminance detection device.
Further, the photosensitive area of described photosensitive probe unit is less than or equal to 1cm
2.
(3) beneficial effect
The present invention carries out intensity detection by photosensitive probe unit to the pixel of LCD screen, and judge whether this pixel is bright spot according to detecting the signal obtained, avoid the problem that the result of determination that causes due to the subjectivity of tester differs greatly, decrease the error that tester causes due to subjective judgement, and then improve the objectivity of detection and the accuracy of testing result.
Accompanying drawing explanation
Fig. 1 is the structural drawing of a kind of luminance detection device that embodiment of the present invention provides;
The structural drawing of Fig. 2 to be the present invention be another kind of luminance detection device that embodiment provides;
Fig. 3 is the structural drawing of another luminance detection device that embodiment of the present invention provides.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Fig. 1 is the structural drawing of a kind of luminance detection device that embodiment of the present invention provides, and comprises photosensitive probe unit 1, signal conversion unit and data-out port 3;
Described photosensitive probe unit 1, for carrying out intensity detection to the pixel of display screen, and is converted to electric signal by the light signal that described pixel sends;
Described signal conversion unit, be connected with described photosensitive probe unit 1 and described data-out port 3 respectively, for described electric signal being converted to digital signal and the brightness data of described digital signal as described pixel being exported by described data-out port 3.
Preferably, in order to avoid the interference of surrounding environment light, this luminance detection device also comprises the main body 4 of barrel-like structure, and described photosensitive probe unit 1 is arranged on the bottom surface of described main body 4.
Preferably, around described photosensitive probe unit, be also provided with transparent window 2, adjusted the position of described photosensitive probe unit 1 by described transparent window 2, to make described photosensitive probe unit 1 just to described pixel.This transparent window 2 can be square or circular, simultaneously also can also arrange multiple transparent window around photosensitive probe unit, such as, can arrange two square transparent windows around photosensitive probe unit.
See Fig. 2, the structural drawing of Fig. 2 to be the present invention be another kind of luminance detection device that embodiment provides, transparent window 2 is annular, described photosensitive probe unit 1 is positioned at the center of described transparent window 2, wherein, described photosensitive probe unit 1 is connected with described signal conversion unit by translucent lead plate 7, by by transparent window be designed to circular, and use translucent circuit lead plate to go between to photosensitive probe unit, due to this transparent window can 360 degree observe, so operation when being more beneficial to test.
Wherein, data-out port 3 can be USB(UniversalSerialBus, USB (universal serial bus)) interface, data-out port 3 can be connected to host computer, host computer receives digital signal by data-out port 3, and judge whether pixel is bright spot according to the digital signal received, particularly, first liquid crystal display to be detected is adjusted to complete black picture, this luminance detection device is covered on the region without any flaw, detect with photosensitive probe unit, host computer can show present intensity value, present intensity value A is set as the standard value of pixel, and then set a deviate B, when tester is when finding low-light level bright spot, this luminance detection device is only needed to cover this shinny pixel, and the position of this device is finely tuned by the transparent window on photosensitive probe unit side, make photosensitive probe unit just to this shinny pixel, then automatically measure, such as, the brightness value of this shinny pixel is C, according to the brightness value of shinny pixel, host computer judges whether this pixel is bright spot, if C-A >=B, then judge that this shinny pixel is as bright spot, if C-A<B, then this shinny pixel is not bright spot, its result can show on the display screen of host computer.
See Fig. 3, Fig. 3 is the structural drawing of another luminance detection device that embodiment of the present invention provides, and its main body 4 is barrel-like structure, and its bottom surface is provided with photosensitive probe unit 1, for carrying out intensity detection to the pixel of LCD screen, and the light signal that this pixel sends is converted to electric signal, this luminance detection device also comprises signal conversion unit and data-out port 3, this signal conversion unit is connected with this photosensitive probe unit, for this electric signal is converted to digital signal, and the brightness data of this digital signal as this pixel is exported by described data-out port 3, transparent window 2 is also provided with around this photosensitive probe unit 1, the position of this luminance detection device is adjusted by described transparent window 2, to make described photosensitive probe unit 1 just to this pixel, in addition, also luminance detection device also comprises input block 6, processing unit and display unit 5, this input block is connected with this processing unit, for inputting the operation information of user, this processing unit is connected with this data-out port, for judging according to this digital signal whether this pixel is bright spot, this display unit is connected with this processing unit, for showing the result after the judgement of this processing unit, such as, this input block comprises shift knob, setting button and test button, first setting operation is carried out by the setting button in input block, particularly, tester presses the setting button in this luminance detection device, and liquid crystal display to be detected is adjusted to complete black picture, this device is covered on the region without any flaw, detect with photosensitive probe unit, display unit can show present intensity value, present intensity value A is set as the standard value of pixel by this luminance detection device, and then by setting button settings deviate B, when tester is when finding low-light level bright spot, Pen-down detection button, and this luminance detection device is covered this shinny pixel, and the position of this device is finely tuned by the transparent window on photosensitive probe unit side, make photosensitive probe unit just to this shinny pixel, then automatically measure, such as, the brightness value of this shinny pixel is C, according to the brightness value of shinny pixel, processing unit judges whether this pixel is bright spot, if C-A >=B, then judge that this shinny pixel is as bright spot, if C-A<B, then this shinny pixel is not bright spot, its result can show on display unit 5.Preferably, this luminance detection device also comprises power supply, for providing voltage to described luminance detection device, such as, can power supply can be button cell.Present embodiment does not need the host computer by USB connecting test equipment, use button cell drives, and carries display screen 5 and action button 6, and action button is used for switch and the setting of device, be convenient to user detect, and improve the portability of this device further.
Preferably, in order to reduce low-light level bright spot neighboring area to the impact of measurement result, the photosensitive area of described photosensitive probe unit is less than or equal to 1cm
2, such as, can be 0.3cm
2, 0.4cm
2, 0.8cm
2.
The present invention carries out intensity detection by photosensitive probe unit to the pixel of LCD screen, and judge whether this pixel is bright spot according to detecting the signal obtained, avoid the problem that the result of determination that causes due to the subjectivity of tester differs greatly, decrease the error that tester causes due to subjective judgement, and then improve the objectivity of detection and the accuracy of testing result.
In addition, the luminance detection device structure that embodiment of the present invention provides is simple, volume is little, good portability, not only be applicable to Thin Film Transistor-LCD (TFT-LCD) and detect low-light level bright spot, be also applicable to the detection that display of organic electroluminescence (OLED) and other display type carry out low-light level bright spot.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (8)
1. a luminance detection device, is characterized in that, comprises photosensitive probe unit, signal conversion unit and data-out port;
Described photosensitive probe unit, for carrying out intensity detection to the pixel of display screen, and is converted to electric signal by the light signal that described pixel sends;
Described signal conversion unit, be connected with described photosensitive probe unit and described data-out port respectively, for described electric signal being converted to digital signal and the brightness data of described digital signal as described pixel being exported by described data-out port;
Also comprise the main body of barrel-like structure, described photosensitive probe unit is arranged on the bottom surface of described main body;
Also transparent window is provided with, by the position of the described photosensitive probe unit of described transparent window adjustment, to make described photosensitive probe unit just to described pixel around described photosensitive probe unit.
2. luminance detection device according to claim 1, is characterized in that, described transparent window is square or circular.
3. luminance detection device according to claim 1, is characterized in that, described transparent window is annular, and described photosensitive probe unit is positioned at the center of described transparent window.
4. luminance detection device according to claim 1, is characterized in that, described photosensitive probe unit is connected with described signal conversion unit by translucent lead plate.
5. luminance detection device according to claim 1, is characterized in that, described data-out port is USB interface.
6. luminance detection device according to claim 1, it is characterized in that, also comprise input block, processing unit and display unit, described input block is connected with described processing unit, for inputting the operation information of user, described processing unit is connected with described data-out port, for judging according to described digital signal whether described pixel is bright spot, described display unit is connected with described processing unit, for showing the result after the judgement of described processing unit.
7. luminance detection device according to claim 6, is characterized in that, also comprises power supply, for providing voltage to described luminance detection device.
8. luminance detection device according to claim 1, is characterized in that, the photosensitive area of described photosensitive probe unit is less than or equal to 1cm
2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310571841.3A CN103592787B (en) | 2013-11-13 | 2013-11-13 | Luminance detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310571841.3A CN103592787B (en) | 2013-11-13 | 2013-11-13 | Luminance detection device |
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| CN103592787A CN103592787A (en) | 2014-02-19 |
| CN103592787B true CN103592787B (en) | 2016-03-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105516824A (en) * | 2015-12-10 | 2016-04-20 | 小米科技有限责任公司 | Method and device for adjusting brightness of television screen |
| CN108803097B (en) * | 2018-06-28 | 2021-03-26 | Tcl华星光电技术有限公司 | Detection method and detection device for pixel dark state light leakage |
| CN111292300B (en) * | 2020-01-21 | 2023-09-01 | 京东方科技集团股份有限公司 | Method and apparatus for detecting bright spot defect of display panel, and readable storage medium |
| CN113889053B (en) * | 2021-06-04 | 2022-07-22 | 荣耀终端有限公司 | Screen brightness adjusting method based on ambient light sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078666A (en) * | 2006-05-26 | 2007-11-28 | 鸿富锦精密工业（深圳）有限公司 | Reflective type display apparatus detection device and method |
| JP4053571B2 (en) * | 2006-07-05 | 2008-02-27 | シャープ株式会社 | Luminance calculation method, luminance calculation device, inspection device, luminance calculation program, and computer-readable recording medium |
| KR20100000848A (en) * | 2008-06-25 | 2010-01-06 | 엘지디스플레이 주식회사 | Liquid crystal display device |
| CN101661169A (en) * | 2008-08-27 | 2010-03-03 | 北京京东方光电科技有限公司 | Method and device for detecting bright spot and dark spot of liquid crystal display |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078666A (en) * | 2006-05-26 | 2007-11-28 | 鸿富锦精密工业（深圳）有限公司 | Reflective type display apparatus detection device and method |
| JP4053571B2 (en) * | 2006-07-05 | 2008-02-27 | シャープ株式会社 | Luminance calculation method, luminance calculation device, inspection device, luminance calculation program, and computer-readable recording medium |
| KR20100000848A (en) * | 2008-06-25 | 2010-01-06 | 엘지디스플레이 주식회사 | Liquid crystal display device |
| CN101661169A (en) * | 2008-08-27 | 2010-03-03 | 北京京东方光电科技有限公司 | Method and device for detecting bright spot and dark spot of liquid crystal display |
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