CN103592787A - Brightness detection device - Google Patents
Brightness detection device Download PDFInfo
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- CN103592787A CN103592787A CN201310571841.3A CN201310571841A CN103592787A CN 103592787 A CN103592787 A CN 103592787A CN 201310571841 A CN201310571841 A CN 201310571841A CN 103592787 A CN103592787 A CN 103592787A
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- 238000001514 detection method Methods 0.000 title claims abstract description 59
- 206010070834 Sensitisation Diseases 0.000 claims description 45
- 239000000523 sample Substances 0.000 claims description 45
- 230000008313 sensitization Effects 0.000 claims description 45
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 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 brightness detection device which comprises a photosensitive detection unit, a signal converting unit and a data output port. The photosensitive detection unit is used for brightness detection of a pixel of a display screen and converting a light signal sent by the pixel into an electric signal. The signal converting unit is connected with the photosensitive detection unit and the data output port and used for converting the electric signal into a digital signal so that the digital signal can serve as brightness data of the pixel and be output through the data output port. The photosensitive detection unit carries out brightness detection on the pixel of the liquid crystal screen and judges whether the pixel is a bright spot according to the detected signal, so that the problem that judging results are much different due to subjectivity of testing personnel is avoided, errors caused by subjective judgment of the testing personnel are reduced, and therefore detection objectivity and accuracy of detection results are improved.
Description
Technical field
The present invention relates to demonstration field, relate in particular to a kind of luminance detection device.
Background technology
Due to liquid crystal display (Liquid Crystal Display, LCD) there is low diathermaneity, the feature such as volume is light, weight is little and power consumption is low, replaced gradually traditional cathode-ray tube (CRT) (Cathode Ray Tube, CRT) display, be widely used in the fields such as desktop computer, notebook computer, personal digital assistant (Personal Digital Assistant, PDA), mobile phone, TV.
For guaranteeing the product quality of liquid crystal display, before dispatching from the factory, need liquid crystal display to detect, low-light level bright spot refers under complete black picture, but the shinny brightness of whole pixel is very low, or just the part position of pixel is shinny.For these situations, when carrying out liquid crystal display detection, need tester according to criterion, what be no more than standard is judged to be vanishing point or small-sized foreign matter badness, and it is overproof that to be judged to bright spot bad.Whether surpass the grade that criterion is directly connected to liquid crystal display, thereby determine the benefit of production.
In Thin Film Transistor-LCD industry, low-light level bright spot is acceptable, but, also there is no at present the device that can automatically detect and carry out objective judgement to this low-light level bright spot, because testing staff is different for brightness perception degree, so these judge all the subjectivity with tester, and judgement between tester differs greatly, thereby has caused 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: a kind of luminance detection device is provided, can effectively solves the subjectivity due to testing staff in prior art and cause the not high problem of liquid crystal display bright spot detection accuracy.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of luminance detection device, comprise sensitization probe unit, signal conversion unit and data-out port;
Described sensitization probe unit, for the pixel of display screen is carried out to brightness detection, and the light signal that described pixel is sent is converted to electric signal;
Described signal conversion unit, be connected with described sensitization probe unit and described data-out port respectively, for described electric signal being converted to digital signal and the brightness data using described digital signal as described pixel is exported by described data-out port.
Further, also comprise the main body of barrel-like structure, described sensitization probe unit is arranged on the bottom surface of described main body.
Further, described sensitization probe unit is also provided with transparent window around, adjusts the position of described sensitization probe unit, so that described sensitization probe unit is over against described pixel by described transparent window.
Further, described transparent window is square or circular.
Further, described transparent window is annular, and described sensitization probe unit is positioned at the center of described transparent window.
Further, described sensitization 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 user's operation information, 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 described processing unit judgement.
Further, also comprise power supply, for providing voltage to described luminance detection device.
Further, the photosensitive area of described sensitization probe unit is less than or equal to 1cm
2.
(3) beneficial effect
The present invention carries out brightness detection by sensitization probe unit to the pixel of LCD screen, and the signal obtaining according to detection judges whether this pixel is bright spot, the problem that the result of determination of having avoided the subjectivity due to tester to cause differs greatly, reduce the error that tester causes due to subjective judgement, and then improved 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 of providing of embodiment of the present invention;
Fig. 2 is that the present invention is the structural drawing of the another kind of luminance detection device that provides of embodiment;
Fig. 3 is the structural drawing of another luminance detection device of providing of embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating 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 of providing of embodiment of the present invention, comprises sensitization probe unit 1, signal conversion unit and data-out port 3;
Described sensitization probe unit 1, for the pixel of display screen is carried out to brightness detection, and the light signal that described pixel is sent is converted to electric signal;
Described signal conversion unit, be connected with described sensitization probe unit 1 and described data-out port 3 respectively, for described electric signal being converted to digital signal and the brightness data using described digital signal as described pixel, by described data-out port 3, export.
Preferably, for fear of the interference of surrounding environment light, this luminance detection device also comprises the main body 4 of barrel-like structure, and described sensitization probe unit 1 is arranged on the bottom surface of described main body 4.
Preferably, described sensitization probe unit is also provided with transparent window 2 around, adjusts the position of described sensitization probe unit 1, so that described sensitization probe unit 1 is over against described pixel by described transparent window 2.This transparent window 2 can also can also arrange a plurality of transparent windows around at sensitization probe unit for square or circular simultaneously, for example, two square transparent windows can be set in the surrounding of sensitization probe unit.
Referring to Fig. 2, Fig. 2 is that the present invention is the structural drawing of the another kind of luminance detection device that provides of embodiment, transparent window 2 is annular, described sensitization probe unit 1 is positioned at the center of described transparent window 2, wherein, described sensitization 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 sensitization probe unit, because this transparent window can be observed by 360 degree, so the operation while being more beneficial to test.
Wherein, data-out port 3 can be USB(Universal Serial Bus, USB (universal serial bus)) interface, data-out port 3 can be connected to host computer, host computer is by data-out port 3 receiving digital signals, and judge according to the digital signal receiving whether pixel is bright spot, particularly, first liquid crystal display to be detected is adjusted to complete black picture, this luminance detection device is covered on to the region without any flaw, with sensitization probe unit, survey, on host computer, can show current brightness value, current brightness value A is set as to the standard value of pixel, and then set a deviate B, when tester is when finding low-light level bright spot, only need this luminance detection device to cover this shinny pixel, and by the transparent window on sensitization probe unit side, finely tune the position of this device, make sensitization probe unit over against this shinny pixel, then automatically measure, for example, the brightness value of this shinny pixel is C, host computer judges according to the brightness value of shinny pixel whether this pixel is bright spot, if C-A >=B, judge that this shinny pixel is bright spot, if C-A<B, this shinny pixel is not bright spot, its result can show on the display screen of host computer.
Referring to Fig. 3, Fig. 3 is the structural drawing of another luminance detection device of providing of embodiment of the present invention, and its main body 4 is barrel-like structure, and its bottom surface is provided with sensitization probe unit 1, for the pixel of LCD screen is carried out to brightness detection, and the light signal that this pixel is sent 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 sensitization probe unit, for this electric signal is converted to digital signal, and the brightness data using this digital signal as this pixel is exported by described data-out port 3, this sensitization probe unit 1 is also provided with transparent window 2 around, by described transparent window 2, adjust the position of this luminance detection device, so that described sensitization probe unit 1 is over against 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 user's operation information, 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 this processing unit judgement, for example, this input block comprises shift knob, set button and test button, first by the setting button in input block, carry out setting operation, 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 to the region without any flaw, with sensitization probe unit, survey, on display unit, can show current brightness value, this luminance detection device is set as current brightness value A the standard value of pixel, and then by setting deviate B of button settings, when tester is when finding low-light level bright spot, Pen-down detection button, and this luminance detection device is covered to this shinny pixel, and by the transparent window on sensitization probe unit side, finely tune the position of this device, make sensitization probe unit over against this shinny pixel, then automatically measure, for example, the brightness value of this shinny pixel is C, processing unit judges according to the brightness value of shinny pixel whether this pixel is bright spot, if C-A >=B, judge that this shinny pixel is bright spot, if C-A<B, 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, for example, can power supply can be button cell.Present embodiment does not need by the host computer of USB connecting test equipment, use button cell drives, and carries display screen 5 and action button 6, and action button is for switch and the setting of device, be convenient to user and detect, and improve further the portability of this device.
Preferably, in order to reduce the impact of low-light level bright spot neighboring area on measurement result, the photosensitive area of described sensitization probe unit is less than or equal to 1cm
2, for example, can be 0.3cm
2, 0.4cm
2, 0.8cm
2.
The present invention carries out brightness detection by sensitization probe unit to the pixel of LCD screen, and the signal obtaining according to detection judges whether this pixel is bright spot, the problem that the result of determination of having avoided the subjectivity due to tester to cause differs greatly, reduce the error that tester causes due to subjective judgement, and then improved the objectivity of detection and the accuracy of testing result.
In addition, luminance detection device that embodiment of the present invention provides is simple in structure, 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 display of organic electroluminescence (OLED) and other display type and carry out the detection of low-light level bright spot.
Above embodiment is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. a luminance detection device, is characterized in that, comprises sensitization probe unit, signal conversion unit and data-out port;
Described sensitization probe unit, for the pixel of display screen is carried out to brightness detection, and the light signal that described pixel is sent is converted to electric signal;
Described signal conversion unit, be connected with described sensitization probe unit and described data-out port respectively, for described electric signal being converted to digital signal and the brightness data using described digital signal as described pixel is exported by described data-out port.
2. luminance detection device according to claim 1, is characterized in that, also comprises the main body of barrel-like structure, and described sensitization probe unit is arranged on the bottom surface of described main body.
3. luminance detection device according to claim 2, is characterized in that, described sensitization probe unit is also provided with transparent window around, adjusts the position of described sensitization probe unit, so that described sensitization probe unit is over against described pixel by described transparent window.
4. luminance detection device according to claim 3, is characterized in that, described transparent window is square or circular.
5. luminance detection device according to claim 3, is characterized in that, described transparent window is annular, and described sensitization probe unit is positioned at the center of described transparent window.
6. luminance detection device according to claim 1, is characterized in that, described sensitization probe unit is connected with described signal conversion unit by translucent lead plate.
7. luminance detection device according to claim 1, is characterized in that, described data-out port is USB interface.
8. 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 user's operation information, 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 described processing unit judgement.
9. luminance detection device according to claim 8, is characterized in that, also comprises power supply, for providing voltage to described luminance detection device.
10. luminance detection device according to claim 1, is characterized in that, the photosensitive area of described sensitization probe unit is less than or equal to 1cm
2.
Priority Applications (1)
| 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 true CN103592787A (en) | 2014-02-19 |
| CN103592787B CN103592787B (en) | 2016-03-02 |
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Cited By (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 |
| CN108803097A (en) * | 2018-06-28 | 2018-11-13 | 深圳市华星光电技术有限公司 | The detection method and detection device of pixel dark-state light leakage |
| CN111292300A (en) * | 2020-01-21 | 2020-06-16 | 京东方科技集团股份有限公司 | Method and apparatus for detecting bright spot failure of display panel, and readable storage medium |
| CN113889053A (en) * | 2021-06-04 | 2022-01-04 | 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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2013
- 2013-11-13 CN CN201310571841.3A patent/CN103592787B/en not_active Expired - Fee Related
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 |
Cited By (6)
| 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 |
| CN108803097A (en) * | 2018-06-28 | 2018-11-13 | 深圳市华星光电技术有限公司 | The detection method and detection device of pixel dark-state light leakage |
| 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 |
| CN111292300A (en) * | 2020-01-21 | 2020-06-16 | 京东方科技集团股份有限公司 | Method and apparatus for detecting bright spot failure of display panel, and readable storage medium |
| 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 |
| CN113889053A (en) * | 2021-06-04 | 2022-01-04 | 荣耀终端有限公司 | Screen brightness adjusting method based on ambient light sensor |
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| Publication number | Publication date |
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| CN103592787B (en) | 2016-03-02 |
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