CN101369059A - Detection apparatus and detection method - Google Patents
Detection apparatus and detection method Download PDFInfo
- Publication number
- CN101369059A CN101369059A CNA2007101423198A CN200710142319A CN101369059A CN 101369059 A CN101369059 A CN 101369059A CN A2007101423198 A CNA2007101423198 A CN A2007101423198A CN 200710142319 A CN200710142319 A CN 200710142319A CN 101369059 A CN101369059 A CN 101369059A
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- polaroid
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- crystal panel
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Abstract
The invention relates to a detecting device, which is suitable for detecting the angle of a light absorption axis of a first polarizer of a liquid crystal panel, and the liquid crystal panel comprises a first baseplate, a second baseplate and a liquid layer. The detecting device includes a light source, a rotatable detecting polarizer and a light detector. The light source is arranged at one side of the liquid crystal panel, and the liquid crystal panel is arranged on the optical path of the light source. The rotatable detecting polarizer is arranged at the other side of the liquid crystal panel and is arranged on the optical path of the light source, and the first polarizer is arranged between the baseplate and the rotatable detecting polarizer. The optical detector is arranged on the optical path of the light source, and the optical detector and the first polarizer are respectively arranged at two sides of the rotatable detecting polarizer; so using the detecting device can rapidly detect the angle of the light absorption axis of the first polarizer.
Description
Technical field
The invention relates to a kind of pick-up unit and detection method, and particularly relevant for a kind of pick-up unit and detection method of angle of absorption axes of the polaroid that is used to detect liquid crystal panel.
Background technology
Along with electronic industry is flourishing day by day, flat-panel screens is eliminated cathode-ray tube display, becomes present main flow.And in flat-panel screens, again with the most skillful and universalness of technology of LCD.Wherein, the liquid crystal panel key point of the good excuse of LCD quality especially.
Fig. 1 is the decomposing schematic representation of available liquid crystal panel.Please refer to Fig. 1, liquid crystal panel 100 comprises one first polaroid 110, one first substrate 120, one second substrate 130, a liquid crystal layer 140 and one second polaroid 150.Liquid crystal layer 140 is between first substrate 120 and second substrate 130.First polaroid 110 is disposed on first substrate 120, and first polaroid 110 and liquid crystal layer 140 lay respectively at the both sides of first substrate 120.Second polaroid 150 is disposed on second substrate 130, and second polaroid 150 and liquid crystal layer 140 lay respectively at the both sides of second substrate 130.
In the ordinary course of things, have bit errors between first polaroid 110 and first substrate 120, and also have bit errors between second polaroid 110 and second substrate 130.But if first polaroid 110 and second polaroid 150 be because of bit errors when excessive, the display quality of using the LCD of this liquid crystal panel 100 will descend.Therefore, in the manufacture process of liquid crystal panel, need monitor the precision that polaroid attaches at any time, within the acceptable range with bit errors control.
The method that existing measurement polaroid attaches precision is to set in advance a plurality of marks on liquid crystal panel and polaroid, and with the distance of the mark on the microscopic examination liquid crystal panel and the mark on the polaroid attaching precision with the judgement polaroid.
Though above-mentioned detection method can detect the attaching precision of polaroid, microscope needs to move between each mark when detecting, and focuses and wait action, so can expend the considerable time when detecting.
Summary of the invention
The invention provides a kind of pick-up unit, but the angle of the light absorption axle of the polaroid of fast detecting liquid crystal panel.
The present invention provides a kind of detection method in addition, can use the angle of above-mentioned detection device with the light absorption axle of the polaroid of fast detecting liquid crystal panel.
For addressing the above problem, the present invention proposes a kind of pick-up unit, be suitable for detecting the angle of a light absorption axle of one first polaroid of a liquid crystal panel, and liquid crystal panel also comprises one first substrate, one second substrate and a liquid crystal layer, wherein liquid crystal layer is disposed between first substrate and second substrate, and first polaroid is disposed on first substrate, and first polaroid and liquid crystal layer lay respectively at the both sides of first substrate.Pick-up unit comprises a light source, a rotatable detection polaroid and a photodetector.Light source is disposed at a side of liquid crystal panel, and liquid crystal panel is positioned at the optical path of light source.Rotatable detection polaroid is disposed at the opposite side of liquid crystal panel, and is positioned at the optical path of light source, and first polaroid is between first substrate and rotatable detection polaroid.Photodetector is positioned at the optical path of light source, and photodetector and first polaroid lay respectively at the both sides of rotatable detection polaroid.
In pick-up unit of the present invention, above-mentioned detection device also comprises a microscope carrier, is used for bearing liquid crystal display panel.
In pick-up unit of the present invention, above-mentioned detection device also comprises a step motor, controls the anglec of rotation of rotatable detection polaroid.
In pick-up unit of the present invention, above-mentioned detection device also comprises a pen recorder, writes down the anglec of rotation of rotatable detection polaroid.
In pick-up unit of the present invention, above-mentioned light source is a laser light source.
In pick-up unit of the present invention, above-mentioned photodetector is a charge coupled cell photodetector (CCDphotodetector).
In pick-up unit of the present invention, above-mentioned photodetector is a CMOS (Complementary Metal Oxide Semiconductor) photodetector (CMOS photodetector).
In pick-up unit of the present invention, above-mentioned photodetector is a photodiode light detectors
(photodiode?photodetector)。
In pick-up unit of the present invention, above-mentioned liquid crystal panel also comprises one second polaroid, be disposed on second substrate, and between second substrate and light source.
The present invention proposes a kind of detection method in addition, be suitable for detecting the angle of a light absorption axle of one first polaroid of a liquid crystal panel, and liquid crystal panel also comprises one first substrate, one second substrate and a liquid crystal layer, wherein liquid crystal layer is disposed between first substrate and second substrate, and first polaroid is disposed on first substrate, and first polaroid and liquid crystal layer lay respectively at the both sides of first substrate, and detection method may further comprise the steps.At first, provide an above-mentioned pick-up unit, and liquid crystal panel is placed between light source and the rotatable detection polaroid, and first polaroid is between first substrate and rotatable detection polaroid.Then, use the light source irradiation liquid crystal panel, and measure light intensity with photodetector.Next, adjust the angle of the light absorption axle of rotatable detection polaroid, wherein when light intensity that photodetector measured reached maximal value, the angle of rotatable detection polaroid was represented the angle of the light absorption axle of first polaroid.
Based on above-mentioned, the present invention utilizes rotatable detection polaroid to detect the angle of the light absorption axle of first polaroid.When the angle of adjusting rotatable detection polaroid, when making light intensity reach maximal value, the angle of rotatable detection polaroid is just represented the angle of the light absorption axle of first polaroid.Therefore, compared to conventional detection, detection method ratio of the present invention faster.In addition, pick-up unit of the present invention also can be applicable on the production line, so that carry out the detection of instant (realtime), and to improve the product yield.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is the decomposing schematic representation of available liquid crystal panel.
Fig. 2 A is the decomposing schematic representation of pick-up unit of the present invention and liquid crystal panel.
Fig. 2 B is the calcspar of pick-up unit among Fig. 2 A.
Fig. 3 is for using the detection method process flow diagram of pick-up unit among Fig. 2 A.
The main element symbol description
100: liquid crystal panel
110: the first polaroids
120: the first substrates
130: the second substrates
140: liquid crystal layer
150: the second polaroids
200: pick-up unit
210: light source
212: light
214: polarized light
220: rotatable detection polaroid
230: photodetector
240: microscope carrier
250: step motor
260: pen recorder
300: liquid crystal panel
310: the first polaroids
320: the first substrates
330: the second substrates
340: liquid crystal layer
350: the second polaroids
410,420,430: step
A
1, A
2, A
R: the light absorption axle
I, I ': light intensity
Y: direction
θ
1, θ
R: angle
Embodiment
Fig. 2 A is the decomposing schematic representation of a kind of pick-up unit of one embodiment of the invention, and Fig. 2 B is the calcspar of a kind of pick-up unit of one embodiment of the invention.Please refer to Fig. 2 A and Fig. 2 B, pick-up unit 200 is suitable for detecting a light absorption axle A of one first polaroid 310 of a liquid crystal panel 300
1Angle, and liquid crystal panel 300 also comprises one first substrate 320, one second substrate 330, a liquid crystal layer 340 and one second polaroid 350, wherein liquid crystal layer 340 is disposed between first substrate 320 and second substrate 330, and first polaroid 310 is disposed on first substrate 320, and first polaroid 310 and liquid crystal layer 340 lay respectively at the both sides of first substrate 320.In addition, second polaroid 350 is disposed on second substrate 330, and between second substrate 330 and light source 210.
It should be noted that this liquid crystal panel 300 does not need to be driven.In addition, in the present embodiment, liquid crystal panel 300 has attached first polaroid 310 and second polaroid 350.Yet in another embodiment, pick-up unit 200 also can be used to detect the liquid crystal panel 300 that has only attaching first polaroid 310.
Pick-up unit 200 comprises a light source 210, one a rotatable detection polaroid 220 and a photodetector 230.Light source 210 is disposed at a side of liquid crystal panel 300, and liquid crystal panel 300 is positioned on the optical path of light source 210.Rotatable detection polaroid 220 is disposed at the opposite side of liquid crystal panel 300, and is positioned at the optical path of light source 210, and first polaroid 310 is between first substrate 320 and rotatable detection polaroid 220.Photodetector 230 is positioned at the optical path of light source 210, and photodetector 230 and first polaroid 310 lay respectively at the both sides of rotatable detection polaroid 220.
In the present embodiment, pick-up unit 200 also can have a microscope carrier 240 with bearing liquid crystal display panel 300.Yet liquid crystal panel 300 also can be held, suspend in midair or other modes and being fixed between light source 210 and the rotatable detection polaroid 220.In addition, pick-up unit 200 also can have a step motor 250 to drive rotatable detection polaroid 220.Yet rotatable detection polaroid 220 also can be driven by other mechanical hook-ups or electronic installation.In addition, pick-up unit 200 can comprise a pen recorder 260 again, in order to write down the light absorption axle A of rotatable detection polaroid 220
RAngle θ
R
Above-mentioned light source 210 can be the light source of a LASER Light Source, infrared light light source, ultraviolet source, visible light source or wavelength.In addition, above-mentioned photodetector 230 photodetector that is metal-oxide semiconductor (MOS) photodetector, charge coupled cell photodetector, photodiode light detectors or other kenels.
The light that light source 210 sends is understood by polarization after passing through first polaroid 310, and becomes the polarization direction perpendicular to light absorption axle A
1Polarized light 214.Polarized light 214 can change by rotatable detection polaroid 220 back light intensities.In addition, the change of the light intensity of polarized light 214 can be represented with following formula:
I’＝I×cos(θ
1-θ
R)
Angle θ wherein
1Be the light absorption axle A of first polaroid 310
1With the angle of direction y, and angle θ
RLight absorption axle A for rotatable detection polaroid 220
RAngle with direction y.I is a polarized light 214 by the light intensity after first polaroid 310, and I ' is a light 212 by the intensity after the rotatable detection polaroid 220, just photodetector 230 detected light intensities.It should be noted that when light intensity I ' is maximal value angle θ
1With angle θ
REquate.Therefore, measure angle θ during for maximal value as light intensity I '
RCan push away angle θ
1
Based on above-mentioned content, below will be with the light absorption axle A of first polaroid 310 that detects liquid crystal panel 300
1Angle θ
1Be example, introduce the detection method of using pick-up unit 200 to detect the light absorption shaft angle degree of polaroid.
Fig. 3 is for using the detection method process flow diagram that pick-up unit carried out among Fig. 2 A.Please refer to Fig. 2 A and Fig. 3, at first, shown in step 410, provide pick-up unit 200, and liquid crystal panel 300 placed between light source 210 and the rotatable detection polaroid 220, and make first polaroid 310 be positioned at first substrate 320 and rotatable detection polaroid 220.
Next, shown in step 420, use light source 210 irradiating liquid crystal panels 300, and measure light intensity I ' with photodetector 230.
Then, shown in step 430, adjust the light absorption axle A of rotatable detection polaroid 220
RAngle θ
R, when the light intensity I ' that is measured when photodetector 230 reaches maximal value, the light absorption axle A of rotatable detection polaroid 220
RAngle θ
RBe the light absorption axle A of first polaroid 310
1Angle θ
1
At the light absorption axle A that detects first polaroid 310
1Angle θ
1The time, operating personnel only need adjust the light absorption axle A of rotatable detection polaroid 220
RAngle θ
R, make light intensity I ' reach maximal value, the angle θ in the time of thus
RPush away angle θ
1Therefore, detect the light absorption axle A of first polaroid 310
1Angle θ
1The required time can shorten.In addition, pick-up unit 200 also can be used in the production line so that carry out the detection of instant (real time), to improve the yield of product.
In addition, if will measure second polaroid 350 time, turning liquid crystal panel 300 makes second polaroid 350 between second substrate 330 and rotatable detection polaroid 220.Afterwards, can carry out the detection of angle of the light absorption axle of second polaroid 350 with reference to above-mentioned steps 410, step 420 and step 430.
In sum, pick-up unit of the present invention only need be adjusted the angle of rotatable detection polaroid, makes light intensity reach maximal value, can be pushed away the angle of the light absorption axle of the polaroid of winning by the angle of rotatable detection polaroid.Because detection method of the present invention is simple, therefore can shortens the time of detection, and pick-up unit is used detection immediately in production line, to improve the product yield.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (10)
1. pick-up unit, be suitable for detecting the angle of a light absorption axle of one first polaroid of a liquid crystal panel, and this liquid crystal panel more comprises one first substrate, one second substrate and a liquid crystal layer, wherein this liquid crystal layer is disposed between this first substrate and this second substrate, and this first polaroid is disposed on this first substrate, and this first polaroid and this liquid crystal layer lay respectively at the both sides of this first substrate, it is characterized in that, this pick-up unit comprises:
One light source be disposed at a side of this liquid crystal panel, and this liquid crystal panel is positioned at the optical path of this light source;
One rotatable detection polaroid is disposed at the opposite side of this liquid crystal panel, and is positioned at the optical path of this light source, and this first polaroid is between this first substrate and this rotatable detection polaroid; And
One photodetector is positioned at the optical path of this light source, and this photodetector and this first polaroid lay respectively at the both sides of this rotatable detection polaroid.
2. pick-up unit as claimed in claim 1 is characterized in that, also comprises a microscope carrier, is used to carry this liquid crystal panel.
3. pick-up unit as claimed in claim 1 is characterized in that, also comprises a step motor, controls the anglec of rotation of this rotatable detection polaroid.
4. pick-up unit as claimed in claim 1 is characterized in that, also comprises a pen recorder, writes down the anglec of rotation of this rotatable detection polaroid.
5. pick-up unit as claimed in claim 1 is characterized in that, this light source is a LASER Light Source.
6. pick-up unit as claimed in claim 1 is characterized in that, this photodetector is a charge coupled cell photodetector.
7. pick-up unit as claimed in claim 1 is characterized in that, this photodetector is a CMOS (Complementary Metal Oxide Semiconductor) photodetector.
8. pick-up unit as claimed in claim 1 is characterized in that, this photodetector is a photodiode light detectors.
9. pick-up unit as claimed in claim 1 is characterized in that, this liquid crystal panel also comprises one second polaroid, be disposed on this second substrate, and between this second substrate and this light source.
10. detection method, be suitable for detecting the angle of a light absorption axle of one first polaroid of a liquid crystal panel, and this liquid crystal panel also comprises one first substrate, one second substrate and a liquid crystal layer, wherein this liquid crystal layer is disposed between this first substrate and this second substrate, and this first polaroid is disposed on this first substrate, and this first polaroid and this liquid crystal layer lay respectively at the both sides of this first substrate, it is characterized in that, this detection method comprises:
One pick-up unit as claimed in claim 1 is provided, and this liquid crystal panel is placed between this light source and this rotatable detection polaroid, and this first polaroid is between this first substrate and this rotatable detection polaroid;
Use this liquid crystal panel of this light source irradiation, and measure light intensity with this photodetector; And
Adjust the angle of the light absorption axle of this rotatable detection polaroid, wherein when light intensity that this photodetector measured reached maximal value, the angle of the light absorption axle of this rotatable detection polaroid was represented the angle of this light absorption axle of this first polaroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101423198A CN101369059A (en) | 2007-08-13 | 2007-08-13 | Detection apparatus and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101423198A CN101369059A (en) | 2007-08-13 | 2007-08-13 | Detection apparatus and detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101369059A true CN101369059A (en) | 2009-02-18 |
Family
ID=40412949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101423198A Pending CN101369059A (en) | 2007-08-13 | 2007-08-13 | Detection apparatus and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101369059A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149727A (en) * | 2011-12-06 | 2013-06-12 | 上海天马微电子有限公司 | Automatic alignment and patching method and system |
| CN103697836A (en) * | 2013-12-19 | 2014-04-02 | 合肥京东方光电科技有限公司 | Axial angle measuring device for polaroid |
| CN105158938A (en) * | 2015-08-31 | 2015-12-16 | 河北冀雅电子有限公司 | Selecting method of polaroids for liquid crystal display |
| CN106019721A (en) * | 2016-07-27 | 2016-10-12 | 京东方科技集团股份有限公司 | Adjusting method and device for polarizers in manufacturing process of light alignment film |
| CN106959083A (en) * | 2017-05-09 | 2017-07-18 | 刘妼雯 | Fin rolls angle detection device |
| CN107065244A (en) * | 2017-05-12 | 2017-08-18 | 京东方科技集团股份有限公司 | A kind of polarizer sheet sticking method and apparatus |
| CN107941207A (en) * | 2017-12-13 | 2018-04-20 | 北京京东方光电科技有限公司 | Gyroscope, electronic device and the method for detecting angular speed |
| CN108181095A (en) * | 2017-12-29 | 2018-06-19 | 惠州市华星光电技术有限公司 | The measuring method and measuring device of polaroid optical parameter |
| CN108195567A (en) * | 2018-01-05 | 2018-06-22 | 信利半导体有限公司 | A kind of quality detection device and detection method of sunglasses functional sheet |
| CN108267450A (en) * | 2018-02-28 | 2018-07-10 | 京东方科技集团股份有限公司 | Substrate detection apparatus and method |
| CN108776399A (en) * | 2018-06-15 | 2018-11-09 | 惠州市华星光电技术有限公司 | The measuring equipment and method for measurement of the absorption axiss of polaroid |
| CN108955579A (en) * | 2018-08-06 | 2018-12-07 | 深圳精创视觉科技有限公司 | A kind of high-precision optical film absorption axiss measuring device |
| TWI670541B (en) * | 2018-07-04 | 2019-09-01 | 陽程科技股份有限公司 | Polarization alignment detecting device and detecting method |
| CN111323945A (en) * | 2020-03-19 | 2020-06-23 | Tcl华星光电技术有限公司 | Polaroid laminating equipment and laminating method thereof |
| CN111530771A (en) * | 2020-05-13 | 2020-08-14 | 深圳市全洲自动化设备有限公司 | Analysis method for rapidly grading colors of STN liquid crystal display |
| CN111781170A (en) * | 2019-04-03 | 2020-10-16 | 阳程科技股份有限公司 | Polarized light alignment detection device and detection method |
| CN111855151A (en) * | 2020-07-02 | 2020-10-30 | 深圳市华星光电半导体显示技术有限公司 | Detection device and detection method for polarizer transmission shaft |
| WO2020258724A1 (en) * | 2019-06-27 | 2020-12-30 | 苏州精濑光电有限公司 | Substrate detection device |
-
2007
- 2007-08-13 CN CNA2007101423198A patent/CN101369059A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103149727A (en) * | 2011-12-06 | 2013-06-12 | 上海天马微电子有限公司 | Automatic alignment and patching method and system |
| CN103697836A (en) * | 2013-12-19 | 2014-04-02 | 合肥京东方光电科技有限公司 | Axial angle measuring device for polaroid |
| CN105158938A (en) * | 2015-08-31 | 2015-12-16 | 河北冀雅电子有限公司 | Selecting method of polaroids for liquid crystal display |
| CN105158938B (en) * | 2015-08-31 | 2019-04-23 | 河北冀雅电子有限公司 | The choosing method of Polarizer Used for Liquid Crystal Display |
| WO2018018931A1 (en) * | 2016-07-27 | 2018-02-01 | 京东方科技集团股份有限公司 | Method and apparatus for adjusting polarizer in manufacturing process of optical alignment film |
| CN106019721A (en) * | 2016-07-27 | 2016-10-12 | 京东方科技集团股份有限公司 | Adjusting method and device for polarizers in manufacturing process of light alignment film |
| CN106959083A (en) * | 2017-05-09 | 2017-07-18 | 刘妼雯 | Fin rolls angle detection device |
| CN107065244A (en) * | 2017-05-12 | 2017-08-18 | 京东方科技集团股份有限公司 | A kind of polarizer sheet sticking method and apparatus |
| CN107065244B (en) * | 2017-05-12 | 2021-01-22 | 京东方科技集团股份有限公司 | Polaroid attaching method and equipment |
| CN107941207A (en) * | 2017-12-13 | 2018-04-20 | 北京京东方光电科技有限公司 | Gyroscope, electronic device and the method for detecting angular speed |
| US11307034B2 (en) | 2017-12-13 | 2022-04-19 | Beijing Boe Optoelectronics Technology Co., Ltd. | Gyroscope, electronic device and method of detecting angular velocity |
| US10746628B2 (en) | 2017-12-29 | 2020-08-18 | Huizhou China Star Optoelectronics Technology Co., Ltd. | Method of measuring optical parameters of polarizer and measuring device |
| CN108181095A (en) * | 2017-12-29 | 2018-06-19 | 惠州市华星光电技术有限公司 | The measuring method and measuring device of polaroid optical parameter |
| CN108195567A (en) * | 2018-01-05 | 2018-06-22 | 信利半导体有限公司 | A kind of quality detection device and detection method of sunglasses functional sheet |
| US10754218B2 (en) | 2018-02-28 | 2020-08-25 | Boe Technology Group Co., Ltd. | Substrate detection device and method |
| CN108267450A (en) * | 2018-02-28 | 2018-07-10 | 京东方科技集团股份有限公司 | Substrate detection apparatus and method |
| CN108776399A (en) * | 2018-06-15 | 2018-11-09 | 惠州市华星光电技术有限公司 | The measuring equipment and method for measurement of the absorption axiss of polaroid |
| CN108776399B (en) * | 2018-06-15 | 2021-06-01 | 惠州市华星光电技术有限公司 | Measuring device and measuring method for absorption axis of polaroid |
| TWI670541B (en) * | 2018-07-04 | 2019-09-01 | 陽程科技股份有限公司 | Polarization alignment detecting device and detecting method |
| CN108955579A (en) * | 2018-08-06 | 2018-12-07 | 深圳精创视觉科技有限公司 | A kind of high-precision optical film absorption axiss measuring device |
| CN108955579B (en) * | 2018-08-06 | 2024-05-24 | 深圳精创视觉科技有限公司 | High-precision optical film absorption axis measuring device |
| CN111781170A (en) * | 2019-04-03 | 2020-10-16 | 阳程科技股份有限公司 | Polarized light alignment detection device and detection method |
| WO2020258724A1 (en) * | 2019-06-27 | 2020-12-30 | 苏州精濑光电有限公司 | Substrate detection device |
| CN111323945A (en) * | 2020-03-19 | 2020-06-23 | Tcl华星光电技术有限公司 | Polaroid laminating equipment and laminating method thereof |
| CN111530771A (en) * | 2020-05-13 | 2020-08-14 | 深圳市全洲自动化设备有限公司 | Analysis method for rapidly grading colors of STN liquid crystal display |
| CN111855151A (en) * | 2020-07-02 | 2020-10-30 | 深圳市华星光电半导体显示技术有限公司 | Detection device and detection method for polarizer transmission shaft |
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Application publication date: 20090218 |