CN1904672A - Apparatus and method for detecting polarizing plate - Google Patents
Apparatus and method for detecting polarizing plate Download PDFInfo
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- CN1904672A CN1904672A CN 200510087209 CN200510087209A CN1904672A CN 1904672 A CN1904672 A CN 1904672A CN 200510087209 CN200510087209 CN 200510087209 CN 200510087209 A CN200510087209 A CN 200510087209A CN 1904672 A CN1904672 A CN 1904672A
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Abstract
The invention relates to a polarized light sheet testing device and the testing method. The device includes a homogeneous light generating device, a light receiving module, a adjusting basal that could be used to support tested polarized light sheet and take micro anger adjusting. When the homogeneous light passes through the tested polarized light sheet, the light receiving module would be tested. A fixed basal could be set between the homogeneous light generating device and the adjusting basal for the testing device to form polarized homogeneous light.
Description
Technical field
The present invention relates to a kind of Polarizer pick-up unit and detection method, relate in particular to a kind of testing precision height, and on-the-spot online in real time measurement function can be provided, fast the method that precisely detects.
Background technology
Commercially available display panels, because liquid crystal molecule is between solid-state and liquid state, not only have liquid and be subject to the external force effect and mobile characteristic, also has the distinctive optical anisotropy of crystal, so the ordered state that can utilize extra electric field to order about liquid crystal changes to other sensing, optical characteristics when causing the light penetration liquid crystal layer changes, and this electric field that promptly is utilization adds produces the modulation phenomenon of light, is referred to as the photoelectric effect of liquid crystal.Utilize this effect can produce various display panels, as stable twisted nematic (TN-Twisted Nematic) display panels, STN Super TN type (STN-Super TN) display panels, and thin film transistor (TFT) (TFT-Thin Film Transistor) display panels etc.Figure 1A is the torsion nematic liquid crystal display panel of the prior art running synoptic diagram before the impressed voltage not, and Figure 1B is the running synoptic diagram behind the torsion nematic liquid crystal display panel impressed voltage of prior art; Please refer to Figure 1A, stable twisted nematic LCD 100 mainly includes: form the alignment film 110,120 of superfine rill 105,106 via grinding (rubbing), and can be with the Polarizer 130,140 of scattering light source direction polar.When nematic crystal 150 is poured between the alignment film 110,120, because nematic crystal 150 its molecules have the flow characteristics of liquid, therefore be easy to arrange along rill 105,106 directions, near rill 105,106 positions the time, the suffered binding force of nematic crystal 150 is bigger, so can arrange along rill 105,106 directions, and nematic crystal 150 binding forces of center section are less, and twisted arrangement, and because turning round altogether, the nematic crystal 150 in the alignment film 110,120 turn 90 degrees, so be called stable twisted nematic.Therefore, do not apply under the voltage condition 110,120 of alignment films, after light 160 is entered by Polarizer 140 and alignment film 120, its direction has been rotated 90 degree with the arrangement of liquid crystal 150, just can be identical with the polarised direction of alignment film 110 and Polarizer 130, so light can penetrate Polarizer 130 smoothly.
Refer again to Figure 1B, after 110,120 of alignment films apply a voltage, nematic crystal 150 will tend to and apply direction of an electric field parallel (as shown in the figure), therefore nematic crystal 150 is one by one perpendicular to alignment film 110,120 surfaces, and after light 160 enters by Polarizer 140 and alignment film 120, its direction can not rotated, so after arriving Polarizer 130, light can't penetrate Polarizer 130.
In sum, the angle of 130,140 of two Polarizers is 90 degree as can be known, and the angle that two Polarizers are 130,140 is very big to the quality influence of display panels, so the precision that transfer in the angle school of Polarizer just seems especially important, yet mode is transferred in the school of prior art, it all is the angle of removing to detect each Polarizer with the board of other purchase, but its employed light source lack of resolution, so error is usually more than 1 degree, and Polarizer must be put into this board when detecting, so make the more complicated inconvenience of flow process.Take a broad view of the above, there are following shortcoming at least in the Polarizer pick-up unit and the method for prior art:
One, use the angle of the board detection Polarizer of prior art, the precision deficiency of its detection can't be guaranteed the modified amount in school.
Two, use the angle of the board detection Polarizer of prior art, its specification must be subject to the board specification of detection, when detecting the Polarizer of different size, just must use different boards, and then increase the cost that detects, and misplace the situation of board test easily.
Three, use the angle of the board detection Polarizer of prior art, it can't finish on-the-spot in line stabilization operation detection, so the efficient of its detection is not good, and then reduces speed of production.
Four, use the angle of the board detection Polarizer of prior art, when the specification of Polarizer changes, just must buy more new board again, and train the testing staff again, and then increase the cost of company.
Summary of the invention
Because the shortcoming of prior art, fundamental purpose of the present invention is to provide a kind of Polarizer pick-up unit and detection method, can improve below precision to 0.1 degree of detection, to improve specific luminance, further improve acceptance rate and utilization rate, guarantee each quality that detects.
Be to provide to of the present invention syllabus a kind of Polarizer pick-up unit and detection method, it is applicable to the Polarizer that detects different specification size, reducing the cost that detects, and the probability that avoids pitfalls.Another object of the present invention is to provide a kind of Polarizer pick-up unit and method, it can be in the scene detects in the line stabilization operation, sets up automatic measurement and cuts technology, improving the efficient of its detection, and then increases the speed of producing.
Another purpose of the present invention is to provide a kind of Polarizer pick-up unit and detection method, the specification of Polarizer need not additionally be bought board not simultaneously, or trains the testing staff again, can be applicable to this pick-up unit and method fully, and then reduce the cost of company.
For reaching above-mentioned purpose, a kind of Polarizer pick-up unit is provided in first preferred embodiment of the present invention, it includes: a monochromatic light generation device can provide a monochromatic source; One Optical Receivers, with the corresponding setting of this monochromatic light generation device, the light signal of this monochromatic source can be converted to can be for the data of interpretation; One adjusts pedestal, is located between this monochromatic light generation device and this Optical Receivers, in order to carry a Polarizer to be measured, can carry out little angular setting to this Polarizer to be measured, and this monochromatic source is by behind this Polarizer to be measured, receives detection by this Optical Receivers.
Provide a kind of Polarizer pick-up unit in second preferred embodiment of the present invention, it includes: a traversing carriage; One monochromatic light generation device is located on this traversing carriage, and this monochromatic light generation device can provide a monochromatic source; One Optical Receivers is located on this traversing carriage, and with the corresponding setting of this monochromatic light generation device, this Optical Receivers can be converted to the light signal of this monochromatic source can be for the data of interpretation; Wherein, a Polarizer to be measured is located between this monochromatic light generation device and this Optical Receivers, and this monochromatic light generation device can correspondingly move with this Optical Receivers, makes this monochromatic source by behind this Polarizer to be measured, is received by this Optical Receivers.
Above-described monochromatic source is continuous wave laser or pulse laser.
Above described Optical Receivers include:
One smooth acquisition unit, it receives this monochromatic source; And
One smooth signal pick-up unit is connected in this light acquisition unit, and being converted in order to the light signal with this monochromatic source can be for the data of interpretation.
This light acquisition unit is selected from charge-coupled device (CCD), complementary metal oxide semiconductor (CMOS), and a kind of in the photomultiplier (PMT).This light signal pick-up unit for example can be an oscillograph.
Above-described Polarizer pick-up unit also can comprise: a polarization Polarizer, be located between this monochromatic light generation device and this Polarizer to be measured, make this monochromatic source by this polarization Polarizer, and this monochromatic light generation device is that continuous wave (CW) laser or pulse (Pulsed) laser are wherein a kind of.
In first preferred embodiment of Polarizer detection method of the present invention, wherein a Polarizer to be measured is located on the adjustment pedestal, and this Polarizer detection method includes the following step:
(a) with a monochromatic source with suitable this Polarizer to be measured of angle directive;
(b) receive the monochromatic source of passing through this Polarizer to be measured, to obtain a detected value;
(c) this detected value and a standard value are compared;
(d) adjust the pedestal rotation with this and adjust the polarizing angle that this surveys Polarizer, make this detected value be similar to this standard value.
In second preferred embodiment of Polarizer detection method of the present invention, it includes the following step:
(a) monochromatic source is passed through a Polarizer to be measured in the axial scan mode;
(b) receive the monochromatic source of passing through this Polarizer to be measured, to obtain several detected values;
(c) with described several detected values and database comparison.
(d) with this Polarizer to be measured of a cut-off knife cutting, because just can learn angular distribution on this Polarizer to be measured according to comparison result, may command is adjusted the angle that cuts of this cut-off knife in view of the above, this institute is surveyed Polarizer cut into required angle.
Description of drawings
Figure 1A is the torsion nematic liquid crystal display panel running synoptic diagram before the impressed voltage not of prior art;
Figure 1B is the running synoptic diagram behind the torsion nematic liquid crystal display panel impressed voltage of prior art;
Fig. 2 is the Polarizer pick-up unit first preferred embodiment synoptic diagram of the present invention;
Fig. 3 is the Polarizer detection method first preferable implementing procedure synoptic diagram of the present invention;
Fig. 4 is Polarizer detection method first preferable enforcement intensity-angle corresponding relation synoptic diagram of the present invention;
Fig. 5 is the Polarizer pick-up unit second preferred embodiment synoptic diagram of the present invention;
Fig. 6 is the Polarizer detection method second preferable implementing procedure synoptic diagram of the present invention.
Drawing reference numeral explanation: 100 stable twisted nematic LCD; 105,106 rills; 110,120 alignment films; 130,140 Polarizers; 150 liquid crystal; 160 light; 500 monochromatic light generation devices; 501 polarization Polarizers; 503a, 503b-conveying roller; 502 Polarizers to be measured; 504 traversing carriages; 505 Optical Receivers; 5051 smooth acquisition units; 5052 smooth signal pick-up units; 506 computing machines; 507 laser; 508 cut-off knives; 400 with a monochromatic source with suitable this Polarizer to be measured of angle directive; 401 receive the monochromatic source by this Polarizer to be measured, to obtain a detected value; 402 with this detected value and standard value comparison; 403 adjust the polarizing angle that this institute surveys Polarizer with the rotation of this adjustment pedestal, make this detected value be similar to this standard value; 600 with a monochromatic source in the axial scan mode by a Polarizer to be measured; 601 receive the monochromatic source by this Polarizer to be measured, to obtain several detected values; 602 with described several detected values and database comparison; 603 survey Polarizer with this institute of a cut-off knife cutting.
Embodiment
For can to feature of the present invention, purpose and function have further cognitive with understand, now conjunction with figs. describe in detail as after.
As shown in Figure 2, it is the Polarizer pick-up unit first preferred embodiment synoptic diagram of the present invention, Polarizer pick-up unit wherein of the present invention uses monochromatic light generation device 200 that a monochromatic source is provided, and the present invention uses continuous wave laser or pulse laser as monochromatic light generation device 200, because of laser that continuous wave laser or pulse laser produced 206 is visible light, because of laser 206 has high resolving power, high brightness and highly purified characteristic, so the wavelength of this laser 206 can be controlled in 380nm to 780nm, that is wavelength of visible light, the waveform that the tester just can distinguish one from the other and be produced, again because the resolution of laser 206 can reach 0.01nm, so its precision that detects the Polarizer polarizing angle more can be up to below 0.1 degree.Then, the polarization Polarizer 201 of carrying on laser 206 directives one fixed pedestal 2010, this fixed pedestal 2010 is located at monochromatic light generation device 200 and is adjusted between the pedestal 2020, after laser 206 is by this polarization Polarizer 201, the polarised direction of laser 206 just becomes identical with this polarization Polarizer 201, and this fixed pedestal 2010 is maintained a fixed position, all identical when testing with the polarised direction that keeps laser 206.Laser 206 directives one that polarized are adjusted the Polarizer to be measured 202 of carrying on the pedestal 2020, and this adjustment pedestal 2020 can carry out little angular setting to Polarizer 202 to be measured, that is adjusts the polarizing angle of Polarizer 202 to be measured.The laser 206 that polarized is received by an Optical Receivers 203 at last, and this Optical Receivers 203 is that corresponding this monochromatic light generation device 200 is provided with, and the light signal of laser 206 can be converted to can be for the data of interpretation.
In general, Optical Receivers 203 is formed (structure of this module belongs to existing known technology) by a smooth acquisition unit 2031 and a smooth signal pick-up unit 2032, wherein, the function of light acquisition unit 2031 is to receive laser 206, and the most normal use charge-coupled device (CCD), complementary metal oxide semiconductor (CMOS) or photomultiplier (PMT) are as original paper; The function of light signal pick-up unit 2032 is that the light signal of laser 206 that light acquisition unit 2031 is received is converted to and can all is to use oscillograph as light signal pick-up unit 2032 usually for the data of interpretation.This Optical Receivers 203 can connect a computing machine 205 as the record comparison device, and computing machine 205 can be with the data recording and the comparison of Optical Receivers 203 interpretations, and the polarizing angle that pedestal 2020 is adjusted Polarizer 202 to be measured is adjusted in control again.
See also Fig. 3 and shown in Figure 4, Fig. 3 is the Polarizer detection method first preferable implementing procedure synoptic diagram of the present invention, Fig. 4 is Polarizer detection method first preferable enforcement intensity-angle corresponding relation synoptic diagram of the present invention, wherein a Polarizer to be measured is located on the adjustment pedestal, and the preferable implementing procedure of Polarizer detection method of the present invention includes the following step:
(a) with a monochromatic source with this Polarizer 400 to be measured of suitable angle directive, wherein this monochromatic source is the laser that continuous wave laser or pulse laser produced, its wavelength is 380 to 780nm, resolution is up to 0.01nm, and so-called suitably angle is meant that the light later that polarizes can be set at 90 degree or 0 degree.
(b) receive the monochromatic source of passing through this Polarizer to be measured, to obtain a detected value 401, the I among this detected value such as Fig. 5
tCurve, this I
tCurve is to be received the light signal of laser by Optical Receivers, and is converted to and can utilizes computing machine that the data of interpretation are drawn as intensity-angle corresponding diagram again for the data of interpretation, and in the time of just can learning how many angles, how many light intensity signals is.
(c) this detected value and a standard value are compared 402, Is curve among this standard value such as Fig. 5, it is the normal data of the intensity-angle correspondence of standard Polarizer, the polarizing angle of employed standard Polarizer is 90 degree in this enforcement, so the intensity maximum of Is curve when 90 spend among Fig. 5, the intensity minimum when 0 degree or 100 is spent.
(d) adjust the polarizing angle that this institute surveys Polarizer with this adjustment pedestal rotation, make this detected value be similar to this standard value 403, utilize this adjustment pedestal rotation to adjust the polarizing angle that this institute surveys Polarizer, at this moment the I among Fig. 5
tCurve just can be worked as I slowly near the Is curve
tCurve approximation is represented approximate 90 degree of polarizing angle of this survey Polarizer when the Is curve, can survey in this and make mark on Polarizer this moment, can learn that just this institute surveys the polarizing angle of Polarizer, so it can be used for the Polarizer test of virtually any size specification.
As shown in Figure 5, it is the Polarizer pick-up unit second preferred embodiment synoptic diagram of the present invention, monochromatic light generation device 500 also is to adopt continuous wave laser or pulse laser in this second preferred embodiment, its function is similar to the present invention's first preferred embodiment, just no longer add to give unnecessary details at this, in addition, the function of polarization Polarizer 501, also similar with polarization Polarizer 201, also no longer add to give unnecessary details at this.Wherein, Polarizer 502 to be measured is located on conveying roller 503a and the 503b, and Polarizer to be measured 502 is online can be delivered to conveying roller 503b by conveying roller 503a, wherein the monochromatic light generation device 500 on the traversing carriage 504 with can correspondingly move with its corresponding Optical Receivers 505, laser 507 scannings are received by this Optical Receivers 505 by Polarizer to be measured 502 backs, this Optical Receivers 505 is converted to the light signal of laser 507 can be for the data of interpretation, sending computing machine 506 again to compares, transmit the information that cuts angle again and give cut-off knife 508, with the angle that determines that cut-off knife 508 will cut, so just, the scene of can finishing is detected in the line stabilization operation, more can effectively improve the efficient of detection, increase the speed of producing.
As shown in Figure 6, it is the Polarizer detection method second preferable implementing procedure synoptic diagram of the present invention, includes the following step:
(a) monochromatic source is crossed a Polarizer 600 to be measured with an axial scan; Wherein this monochromatic source is the laser that continuous wave laser or pulse laser produced, its wavelength is 380 to 780nm, resolution is up to more than the 0.01nm, and should be the radial-axial of this Polarizer to be measured axially, usually the width of this Polarizer to be measured is about 130 centimeters, so after the past, just can obtain the light signal of difference on this Polarizer to be measured by this axial scan.
(b) receive the monochromatic source of passing through this Polarizer to be measured, to obtain several detected values 601, utilizing Optical Receivers that the light signal of laser (monochromatic source) is converted to can be for the data of interpretation, because of this laser inswept this Polarizer to be measured of mode with radial-axial scanning, so the light signal by difference on this Polarizer to be measured can be converted to the detected value of several differences, as the usefulness of follow-up comparison judgement.
(c) with described several detected values and database comparison 602, detected value with several differences that the front obtained, compare with the database in the record comparison device, data in this database are the intensity-angle-data of the Polarizer of various standard polarizing angles, after the intersection comparison, just can learn the angular distribution (angle of the Polarizer to be measured of full wafer has a little error discrepancy usually) on this Polarizer to be measured.
(d) with this Polarizer 603 to be measured of a cut-off knife cutting, survey the angular distribution on the Polarizer by learning in the step (c) after, the angle that cuts of this cut-off knife is adjusted in control, this institute is surveyed Polarizer cut into required angle, make the precision of the Polarizer of surveying in follow-up use higher, its precision can reach 0.1 the degree below.
Polarizer pick-up unit of the present invention and method, because of using continuous wave laser or pulse laser to detect, so detect the Polarizer of finishing through the present invention, its precision is smaller or equal to 0.1 degree, and the mode of generally employed on the market trial and mistake (try and error), precision can only reach about 1 degree, with precision of the present invention difference more than 5 to 10 times at least, so it is after being labelled to liquid crystal panel, its liquid crystal panel showed, and difference 2-4 is doubly at least to specific luminance, if it is higher to specific luminance, then angle of visibility can and then increase, can solve present commercially available LCD Panel and look from different perspectives, the different variations of light and shade can take place, and cause some angle not see the problem of Chu's LCD Panel.
In sum, a kind of Polarizer pick-up unit of the present invention and method, can improve below precision to 0.1 degree of detection, and can improve, and can detect in the line stabilization operation at the scene and finish specific luminance, set up automatic measurement and cut technology, effectively improve the efficient that detects, increase the speed of producing, do not need the extra board that detects of buying again, and train the testing staff again, more can further reduce the cost of company; Only the above, it only is preferred embodiment of the present invention, when not limiting the scope of the invention with it, association obtains easily, such as: the polarized light that uses different polarization angles, the polarization Polarizer is saved, change sense of rotation of adjusting pedestal or the like, the those skilled in the art that are familiar with this field are after comprehension spirit of the present invention, all can expect changing enforcement, promptly the equalization of doing according to claim of the present invention generally changes and modifies, will not lose main idea of the present invention place, also do not break away from the spirit and scope of the present invention, the former capital should be considered as further enforcement situation of the present invention.
Claims (10)
1. Polarizer pick-up unit is characterized in that it includes:
One monochromatic light generation device can provide a monochromatic source;
One Optical Receivers, with the corresponding setting of this monochromatic light generation device, the light signal of this monochromatic source can be converted to can be for the data of interpretation; And
One adjusts pedestal, is located between this monochromatic light generation device and this Optical Receivers, in order to carry a Polarizer to be measured, can carry out little angular setting to this Polarizer to be measured, and this monochromatic source is by behind this Polarizer to be measured, by this Optical Receivers reception.
2. Polarizer pick-up unit as claimed in claim 1 is characterized in that, this monochromatic light generation device is that continuous wave laser and pulse laser are wherein a kind of.
3. Polarizer pick-up unit as claimed in claim 1 is characterized in that, this Optical Receivers includes:
One smooth acquisition unit, it receives this monochromatic source; And
One smooth signal pick-up unit is connected in this light acquisition unit, and being converted in order to the light signal with this monochromatic source can be for the data of interpretation.
4. Polarizer pick-up unit as claimed in claim 3 is characterized in that, this light acquisition unit is selected from charge-coupled device (CCD), complementary metal oxide semiconductor (CMOS), and a kind of in the photomultiplier (PMT).
5. Polarizer pick-up unit as claimed in claim 3 is characterized in that, this light signal pick-up unit can be an oscillograph.
6. a Polarizer detection method is characterized in that, comprises the following steps:
(a) with a monochromatic source with suitable angle directive one Polarizer to be measured;
(b) receive the monochromatic source of passing through this Polarizer to be measured, to obtain a detected value;
(c) this detected value and a standard value are compared; And
(d) adjust the polarizing angle that this Polarizer to be measured is adjusted in the pedestal rotation with this, make this detected value be similar to this standard value.
7. Polarizer pick-up unit is characterized in that it comprises:
One traversing carriage;
One monochromatic light generation device is located at this traversing carriage, and this monochromatic light generation device can provide a monochromatic source;
One Optical Receivers is located at this traversing carriage, and with the corresponding setting of this monochromatic light generation device, this Optical Receivers can be converted to the light signal of this monochromatic source can be for the data of interpretation; And
One Polarizer to be measured is located between this monochromatic light generation device and this Optical Receivers, and wherein, this monochromatic light generation device can correspondingly move with this Optical Receivers, makes this monochromatic source by behind this Polarizer to be measured, is received by this Optical Receivers.
8. Polarizer pick-up unit as claimed in claim 7 is characterized in that, this Optical Receivers includes:
One smooth acquisition unit, it receives this monochromatic source; And
One smooth signal pick-up unit is connected in this light acquisition unit, and being converted in order to the light signal with this monochromatic source can be for the data of interpretation.
9. Polarizer pick-up unit as claimed in claim 8 is characterized in that, this light acquisition unit is selected from charge-coupled device (CCD), complementary metal oxide semiconductor (CMOS), and a kind of in the photomultiplier (PMT).
10. a Polarizer detection method is characterized in that, comprises the following steps:
(a) monochromatic source is passed through a Polarizer to be measured in the axial scan mode;
(b) receive the monochromatic source of passing through this Polarizer to be measured, to obtain several detected values; And
(c) with described several detected values and database comparison.
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| CN 200510087209 CN1904672A (en) | 2005-07-27 | 2005-07-27 | Apparatus and method for detecting polarizing plate |
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| CN 200510087209 CN1904672A (en) | 2005-07-27 | 2005-07-27 | Apparatus and method for detecting polarizing plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108273768A (en) * | 2018-02-09 | 2018-07-13 | 明基材料有限公司 | A kind of polaroid screening plant and screening technique |
-
2005
- 2005-07-27 CN CN 200510087209 patent/CN1904672A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN108273768A (en) * | 2018-02-09 | 2018-07-13 | 明基材料有限公司 | A kind of polaroid screening plant and screening technique |
| CN108273768B (en) * | 2018-02-09 | 2020-04-21 | 明基材料有限公司 | Polaroid screening device and method |
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