CN1333274C - Method for grading a polarizing plate - Google Patents
Method for grading a polarizing plate Download PDFInfo
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- CN1333274C CN1333274C CNB2004100456928A CN200410045692A CN1333274C CN 1333274 C CN1333274 C CN 1333274C CN B2004100456928 A CNB2004100456928 A CN B2004100456928A CN 200410045692 A CN200410045692 A CN 200410045692A CN 1333274 C CN1333274 C CN 1333274C
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- polarizer
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Abstract
The present invention relates to a method for grading a polarizing plate, which comprises the following steps: firstly, providing a polarizing plate and selecting a first measurement range A1 on the polarizing plate, and then initially measuring the polarizing plate; subsequently, changing temperature of the polarizing plate in order to obtain a maximal chromatic value and a minimal chromatic value, and obtaining a net chromatic difference value by reducing the minimal chromatic value by the maximal chromatic value; finally, reducing the net chromatic difference value obtained in the initial measurement procedure by the net chromatic difference value obtained in a restore measurement procedure, and dividing the net chromatic difference value in order to obtain a grading index of the polarizing plate. In this way, the polarizing plate falls into different grades according to the grading index Q value of the polarizing plate.
Description
Technical field
The invention relates to a kind of stage division of Polarizer, this method is to measure two Polarizer solid color degree differences by different temperature and times, by calculating the Polarizer grading index, the height of this index can carry out classification to Polarizer as a kind of foundation again.
Background technology
Advantages such as LCD has that high image quality, volume are little, in light weight, low voltage drive, low consumpting power and applied range.Therefore be widely used in medium and small Portable TV, mobile phone, shoot with video-corder consumer electronics or computer products such as projector, mobile computer, desktop display and projection TV, and replace cathode-ray tube (CRT) (Cathode RayTube gradually; CRT) become the main flow of display, and Polarizer 10 (Polarizing Sheet) or be called light polarizing film (Polarizing Film) and be one of its key components and parts.Shown in Figure 1A, the function of Polarizer 10 is to filter out the light of unspecified directions, becomes the light (polarization light) of specific direction.Based on two Polarizers 10 about a slice LCD configuration, and the polarized light of two Polarizers 10 is mutually 90 degree up and down, then pass through the light of below Polarizer 10, just can not be by top Polarizer 10 (presenting furvous), but if see through regulating and controlling voltage middle layer liquid crystal 20 sense of rotation, bootable polarized light direction changes 90 degree again and by top Polarizer 10 (presenting bright white), can make panel present bright and dark light and change, shown in Figure 1B.In brief, the main effect of Polarizer 10 is that general natural light (non-polarization light) of not having deflection polarity is produced polarization light, makes the light that enters liquid crystal 20 become polarization light.
Yet, be subject to Polarizer 10 properties of materials reasons own, the problem of colourity inequality (Mura) can appear in Polarizer 10 inevitably when assembling or use, wherein especially with the most normal generation of situation of corner colourity inequality (edge mura), as shown in Figure 2, the gap of light and shade greatly and the uneven distribution of color approximately is divided into M as can be known
1', M
2', M
3' and M
4' four color lump that distinguishes.Because the problem of colourity inequality is lacking a generally acknowledged examination criteria on Polarizer 10 markets now, the standard that each tame manufacturer is detected differs, the result who detects for other manufacturer also can't admit, usually cause buyer and seller puzzlement to each other, therefore, the utmost point needs a kind of standardized Polarizer stage division to address the above problem on the market.
Summary of the invention
Therefore the stage division that the purpose of this invention is to provide a kind of Polarizer, this method is to measure two Polarizer solid color degree differences by different temperature and times, by calculating the Polarizer grading index, the height of this index can carry out classification to Polarizer as a kind of foundation again.It is concrete calculate be by measure the resulting solid color degree of colourity difference difference that the colourity difference of (weather-proof test) behind the Polarizer alternating temperature cuts the Polarizer original state divided by the numerical value of the colourity difference gained of Polarizer original state as Polarizer classification foundation.
A further object of the present invention provides a kind of Polarizer stage division, lux (Lux by (weather-proof test) behind the measurement Polarizer alternating temperature, it is a unit of illuminance, it is Foot-candle light, English is abbreviated as fc for foot-candle, be defined as the incident flux density of accepting on the workplace, English is illuminance; Unit changes 1 fc=10.76 lux) the difference resulting clean lux difference of lux difference that cuts the Polarizer original state divided by the numerical value of the colourity difference gained of Polarizer original state as Polarizer classification foundation.
For reaching above-mentioned purpose, Polarizer stage division step provided by the invention is: at first, provide a Polarizer, and select one first measuring range A on Polarizer
1, then this Polarizer is carried out an initial measurement, in X
1Under ℃, Polarizer is put Y
1Measure this first measuring range after hour again to obtain a maximum chrominance value Z
1maxWith Z
1minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
1, W
1=Z
1max-Z
1minNext, Polarizer is carried out an alternating temperature measure, in X
2Under ℃, Polarizer is put Y
2After hour, measure first measuring range to obtain a maximum chrominance value Z
2maxWith Z
2minMinimal color value, wherein X
2≠ X
1, and both obtain solid color degree difference W after subtracting each other
2, W
2=Z
2max-Z
2min, at last with resultant solid color degree difference W in the alternating temperature measurement step
2Cut resultant solid color degree difference W in the initial measurement step
1, again divided by solid color degree difference W
1To obtain Polarizer grading index Q, Q=(W
2-W
1)/W
1, by this, Polarizer is divided into different grades according to the height of Q value;
Wherein, the X in the above-mentioned initial measurement step
1Be local room temperature or 25 ℃, Y
1It is 0 hour～24 hours; X in the above-mentioned alternating temperature measurement step
2Be 60 ℃～120 ℃, Y
2It is 1 hour～168 hours.
A further object of the present invention provides a kind of Polarizer stage division, by measure Polarizer through (weather-proof test) behind the alternating temperature reset into again the resulting solid color degree of colourity difference difference that colourity difference under the room temperature cuts the Polarizer original state divided by the numerical value of the colourity difference gained of Polarizer original state as Polarizer classification foundation.
According to above-mentioned purpose, the step of a kind of Polarizer stage division provided by the invention is: at first, provide a Polarizer, and select one first measuring range A on Polarizer
1, then this Polarizer is carried out an initial measurement, in X
1Under ℃, Polarizer is put Y
1Measure this first measuring range after hour again to obtain a maximum chrominance value Z
1maxWith Z
1minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
1, W
1=Z
1max-Z
1minNext, Polarizer is carried out an alternating temperature step, in X
2Under ℃, this Polarizer is put Y
2Hour, X
2≠ X
1, again this Polarizer is carried out one and restores measurement, in X
3Under ℃, Polarizer is put Y
3Measure first measuring range after hour to obtain a maximum chrominance value Z
3maxWith Z
3minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
3, W
3=Z
3max-Z
3min, will restore resultant solid color degree difference W in the measurement step at last
3Cut resultant solid color degree difference W in the initial measurement step
1, again divided by solid color degree difference W
1To obtain Polarizer grading index Q, Q=(W
3-W
1)/W
1, by this, Polarizer is divided into different grades according to the height of Q value.
Wherein, the X in the above-mentioned initial measurement step
1Be local room temperature or 25 ℃, Y
1It is 0 hour～24 hours; X in the above-mentioned alternating temperature measurement step
2Be 60 ℃～120 ℃, Y
2It is 1 hour～168 hours; X in the above-mentioned recovery measurement step
3Be local room temperature or 25 ℃, Y
3It is 0 hour～24 hours.
Other purpose of the present invention and plurality of advantages will reach with reference to institute's accompanying drawing, and be disclosed completely by the detailed description of following preferred embodiment.
Description of drawings
Figure 1A produces the chiaroscuro effect synoptic diagram to Figure 1B for showing known liquid crystal and Polarizer;
Fig. 2 is for showing the synoptic diagram of known Polarizer corner colourity inequality (edge mura);
Fig. 3 A, Fig. 3 B are for showing the aberration distribution schematic diagram of two samples that measure the first embodiment of the invention gained;
Fig. 3 C is for describing the process flow diagram of the first embodiment of the present invention;
Fig. 4 A, Fig. 4 B, Fig. 4 C are for showing the aberration distribution schematic diagram of three samples that measure the second embodiment of the invention gained;
Fig. 4 D is for describing the process flow diagram of second embodiment of the invention;
Symbol description among the figure:
10 Polarizers
20 liquid crystal
300 Polarizers
S300 begins step
S310 initial measurement step
S320 alternating temperature step
The S330 classification step
400 Polarizers
S400 begins step
S410 initial measurement step
S420 alternating temperature step
S430 restores measurement step
The S440 classification step
The X temperature
The Y time
Z
MaxThe maximum chrominance value
Z
MinThe minimal color value
W solid color degree difference
Q Polarizer grading index
A
1First measuring range
Embodiment
Some embodiments of the present invention can be described in detail as follows, and wherein, each element might not be drawn according to physical size in the accompanying drawing.Some yardstick is understood the present invention so that clearer description to be provided to help the stakeholder who is familiar with this skill with the expression that other partly relevant scale ratio is exaggerated.
First embodiment:
Shown in Fig. 3 A, Fig. 3 B, for showing the two sample aberration distribution schematic diagrams that measure the first embodiment of the invention gained, Fig. 3 C is for describing first embodiment of the present invention process flow diagram.The transverse axis of Fig. 3 A-1, Fig. 3 A-2 and Fig. 3 B-1, Fig. 3 B-2 and the longitudinal axis are defined as respectively measures big small distance of Polarizer area and the chromatic value that measures, and Fig. 3 A-1, Fig. 3 A-2 show two samples its aberration distribution schematic diagram under different conditions respectively with Fig. 3 B-1, Fig. 3 B-2, be that Fig. 3 A-1 and Fig. 3 B-1 are shown in first kind of state (25 ℃ and 0 hour), the aberration distribution schematic diagram of A sample and B sample; Fig. 3 A-2 and Fig. 3 B-2 are shown in second kind of state (80 ℃ and 24 hours), the aberration distribution schematic diagram of A sample and B sample.
Shown in Fig. 3 C, step S300 at first, provides a Polarizer 300, and selects one first measuring range A on Polarizer 300
1, in the present embodiment, the first measuring range A
1Area be equal to the area of Polarizer 300; Step S310 carries out an initial measurement to Polarizer 300, in X
1Under ℃, this Polarizer 300 is put Y
1Measure this first measuring range A after hour again
1To obtain a maximum chrominance value Z
1maxWith Z
1minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
1, i.e. W
1=Z
1max-Z
1min, X
1Can be local room temperature, is 25 ℃ in the present embodiment, Y
1Can be 0～24 hour, is 0 hour at this, and this step can be with reference to shown in figure 3A-1 and Fig. 3 B-1; Step S320 carries out an alternating temperature to Polarizer 300 again and measures, in X
2Under ℃, X
2≠ X
1, Polarizer 300 is put Y
2Measure first measuring range after hour again to obtain a maximum chrominance value Z
2maxWith Z
2minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
2, W
2=Z
2max-Z
2min, X
2Can be 60 ℃～120 ℃, is 80 ℃ in the present embodiment, Y
2Can be 1～168 hour, is 24 hours in the present embodiment, and this step can be with reference to shown in figure 3A-2 and Fig. 3 B-2; Step S330 is with resultant solid color degree difference W among the alternating temperature measurement step S320
2Cut resultant solid color degree difference W among the initial measurement step S310
1, again divided by solid color degree difference W
1To obtain Polarizer 300 grading index Q, i.e. Q=W
2-W
1/ W
1, according to Q value height Polarizer 300 is given classification again.
In addition, also can include several alternating temperature processes among the above-mentioned alternating temperature measurement step S320, after being heated to 45 ℃ from 25 ℃, constant temperature 8 hours; 45 ℃ be heated to 65 ℃ after, constant temperature 8 hours; 65 ℃ be heated to 80 ℃ after constant temperature 8 hours again.
Second embodiment:
Shown in Fig. 4 A, Fig. 4 B, Fig. 4 C, for showing the three sample aberration distribution schematic diagrams that measure the second embodiment of the invention gained, Fig. 4 D is for describing second embodiment of the present invention process flow diagram.The transverse axis of Fig. 4 A-1,4A-2,4A-3,4B-1,4B-2,4B-3 and Fig. 4 C-1,4C-2,4C-3 and the longitudinal axis are defined as respectively measures big small distance of Polarizer area and the chromatic value that measures, and 4A-1,4A-2,4A-3, Fig. 4 B-1,4B-2,4B-3 show three samples its aberration distribution schematic diagram under different conditions respectively with Fig. 4 C-1,4C-2,4C-3, be that Fig. 4 A-1,4A-2,4A-3 are presented at A kind state (25 ℃ and 0 hour), the aberration distribution schematic diagram of the 1st sample, the 2nd sample and the 3rd sample; Fig. 4 B-1,4B-2,4B-3 are presented at B kind state (80 ℃ and 24 hours), the aberration distribution schematic diagram of the 1st sample, the 2nd sample and the 3rd sample; Fig. 4 C-1,4C-2,4C-3 are presented at C kind state (250 ℃ and 24 hours), the aberration distribution schematic diagram of the 1st sample, the 2nd sample and the 3rd sample.
Shown in Fig. 4 D, step S400 at first, provides a Polarizer 400, and selects one first measuring range A on Polarizer 400
1, in the present embodiment, the area of first measuring range is equal to the area step S410 of Polarizer 400, then Polarizer 400 is carried out an initial measurement, in X
1Under ℃, Polarizer 400 is put Y
1Measure the first measuring range A after hour again
1To obtain a maximum chrominance value Z
1maxWith Z
1minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
1, W
1=Z
1max-Z
1min, X
1Can be local room temperature, is 25 ℃ at this, Y
1Can be 0～24 hour, is 0 hour at this, and this step can be with reference to shown in figure 4A-1,4A-2, the 4A-3; Step S420 carries out an alternating temperature step to Polarizer 400, then in X
2Under ℃, Polarizer 400 is put Y
2Hour, X
2≠ X
1, X
2Can be 60 ℃～120 ℃, is 80 ℃ in the present embodiment, Y
2Can be 1～168 hour, is 24 hours at this, and this step can be with reference to shown in figure 4B-1,4B-2, the 4B-3; Step S430 carries out one to Polarizer 400 again and restores measurement, in X
3Under ℃, Polarizer 400 is put Y
3Measure the first measuring range A after hour again
1To obtain a maximum chrominance value Z
3maxWith Z
3minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
3, W
3=Z
3max-Z
3minX
3Can be local room temperature, is 25 ℃ at this; Y
3Can be 0～24 hour, is 24 hours at this, and this step can be with reference to shown in figure 4C-1,4C-2, the 4C-3; Step S440 will restore resultant solid color degree difference W among the measurement step S430
3Cut resultant solid color degree difference W among the initial measurement step S410
1, again divided by solid color degree difference W
1To obtain Polarizer grading index Q, Q=W
3-W
1/ solid color degree difference W
1, according to Q value height Polarizer 400 is given classification again.
In addition, also can include several alternating temperature processes among the above-mentioned alternating temperature measurement step S420, after being heated to 45 ℃ from 25 ℃, constant temperature 8 hours; 45 ℃ be heated to 65 ℃ after, constant temperature 8 hours; 65 ℃ be heated to 80 ℃ after constant temperature 8 hours again.
Though the present invention discloses as above with several preferred embodiments; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking described the claim person of defining.
Claims (6)
1. a Polarizer stage division is characterized in that, this method comprises the following step at least:
One Polarizer is provided;
On this Polarizer, select one first measuring range A
1
This Polarizer is carried out an initial measurement, in X
1Under ℃ temperature, this Polarizer is put Y
1After hour, measure this first measuring range again, to obtain a maximum chrominance value Z
1maxWith Z
1minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
1, W
1=Z
1max-Z
1min
Again this Polarizer is carried out an alternating temperature and measure, in X
2Under ℃ temperature, X
2≠ X
1, this Polarizer is put Y
2After hour, measure this first measuring range again, to obtain a maximum chrominance value Z
2maxWith Z
2minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
2, W
2=Z
2max-Z
2minAnd
With resultant solid color degree difference W in the alternating temperature measurement step
2Cut resultant solid color degree difference W in the initial measurement step
1, again divided by solid color degree difference W
1To obtain Polarizer grading index Q, Q=(W
2-W
1)/W
1, so that this Polarizer is given classification;
Wherein, the X in the above-mentioned initial measurement step
1Be local room temperature or 25 ℃, Y
1It is 0 hour～24 hours; X in the above-mentioned alternating temperature measurement step
2Be 60 ℃～120 ℃, Y
2It is 1 hour～168 hours.
2. the stage division of Polarizer as claimed in claim 1, wherein, maximum and minimum lux value that the maximum of this first scope and minimal color are worth this first scope of available measurement replace, and corresponding thereafter each calculating formula also replaces chromatic value with the lux value in the lump.
3. the stage division of Polarizer as claimed in claim 1 wherein, includes several alternating temperature processes in this alternating temperature measurement step, after this alternating temperature process is heated to 45 ℃ from 25 ℃, and constant temperature 8 hours; 45 ℃ be heated to 65 ℃ after, constant temperature 8 hours; 65 ℃ be heated to 80 ℃ after constant temperature 8 hours again.
The stage division of 4 one kinds of Polarizers is characterized in that, this method comprises the following step at least:
One Polarizer is provided;
On this Polarizer, select one first measuring range A
1
This Polarizer is carried out an initial measurement, in X
1Under ℃, this Polarizer is put Y
1After hour, measure this first measuring range again, to obtain a maximum chrominance value Z
1maxWith Z
1minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
1, W
1=Z
1max-Z
1min
Again this Polarizer is carried out an alternating temperature step, in X
2Under ℃, this Polarizer is put Y
2Hour, X
2≠ X
1
Again this Polarizer is carried out one and restore measurement, in X
3Under ℃, this Polarizer is put Y
3After hour, measure this first measuring range again, to obtain a maximum chrominance value Z
3maxWith Z
3minThe minimal color value, and both obtain solid color degree difference W after subtracting each other
3, W
3=Z
3max-Z
3min
To restore resultant solid color degree difference W in the measurement step
3Cut resultant solid color degree difference W in the initial measurement step
1, again divided by solid color degree difference W
1To obtain Polarizer grading index Q, Q=(W
3-W
1)/W
1, so that this Polarizer is given classification;
Wherein, the X1 in the above-mentioned initial measurement step is that local room temperature or 25 ℃, Y1 are 0 hour～24 hours; X2 in the above-mentioned alternating temperature measurement step is that 60 ℃～120 ℃, Y2 are 1 hour～168 hours; X3 in the above-mentioned recovery measurement step is that local room temperature or 25 ℃, Y3 are 0 hour～24 hours.
5. the stage division of Polarizer as claimed in claim 4, wherein, maximum and minimum lux value that the maximum of this first scope and minimal color are worth this first scope of available measurement replace, and corresponding thereafter each calculating formula also replaces chromatic value with the lux value in the lump.
The stage division of 6 Polarizers as claimed in claim 4 wherein, includes several alternating temperature processes in this alternating temperature measurement step, after this alternating temperature process is heated to 45 ℃ from 25 ℃, and constant temperature 8 hours; 45 ℃ be heated to 65 ℃ after, constant temperature 8 hours; 65 ℃ be heated to 80 ℃ after constant temperature 8 hours again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100456928A CN1333274C (en) | 2004-04-30 | 2004-04-30 | Method for grading a polarizing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100456928A CN1333274C (en) | 2004-04-30 | 2004-04-30 | Method for grading a polarizing plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1690740A CN1690740A (en) | 2005-11-02 |
| CN1333274C true CN1333274C (en) | 2007-08-22 |
Family
ID=35346310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100456928A Expired - Fee Related CN1333274C (en) | 2004-04-30 | 2004-04-30 | Method for grading a polarizing plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1333274C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001166145A (en) * | 1999-09-30 | 2001-06-22 | Fuji Photo Film Co Ltd | Elliptically polarizing plate and liquid crystal display device |
| CN1353298A (en) * | 2000-11-15 | 2002-06-12 | 香港科技大学 | Method and device for measuring parameters of liquid crystal unit |
| US6583832B1 (en) * | 1999-09-30 | 2003-06-24 | Fuji Photo Film., Ltd. | Ellipsoidal polarizing plate comprising two optically anisotropic layers and polarizing membrane |
-
2004
- 2004-04-30 CN CNB2004100456928A patent/CN1333274C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001166145A (en) * | 1999-09-30 | 2001-06-22 | Fuji Photo Film Co Ltd | Elliptically polarizing plate and liquid crystal display device |
| US6583832B1 (en) * | 1999-09-30 | 2003-06-24 | Fuji Photo Film., Ltd. | Ellipsoidal polarizing plate comprising two optically anisotropic layers and polarizing membrane |
| CN1353298A (en) * | 2000-11-15 | 2002-06-12 | 香港科技大学 | Method and device for measuring parameters of liquid crystal unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1690740A (en) | 2005-11-02 |
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