CN106526920B - Liquid crystal display compensates phase difference value measurement method and device in film surface - Google Patents
Liquid crystal display compensates phase difference value measurement method and device in film surface Download PDFInfo
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- CN106526920B CN106526920B CN201611252035.XA CN201611252035A CN106526920B CN 106526920 B CN106526920 B CN 106526920B CN 201611252035 A CN201611252035 A CN 201611252035A CN 106526920 B CN106526920 B CN 106526920B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
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Abstract
Phase difference value measurement method in liquid crystal display compensation film surface of the present invention, including, the light leakage variation of phase difference value in simulation liquid crystal display difference compensation film surface；Phase difference value in compensation film surface is selected to obtain the ratio multiple of phase difference value and phase difference value in benchmark compensation film surface in different compensation film surfaces as benchmark according to the variation of the light leakage of simulation；Phase difference value and light leakage multiple proportion formula in compensation film surface are fitted by ratio multiple；Using the liquid crystal display compensation film of phase difference value in known compensation film surface as the light leakage value of the reference measurement liquid crystal display compensation film；Measure the light leakage value of the liquid crystal display compensation film of phase difference value in compensation film surface to be measured；Obtain the light leakage ratio of the light leakage value of the compensation film surface of the light leakage value and reference measurement liquid crystal display of the liquid crystal display compensation film of phase difference value in measurement compensation film surface to be measured；Light leakage ratio is brought into the compensation film surface fitted and calculates phase difference value in prepare liquid crystalline substance display compensation film surface in phase difference value and light leakage multiple proportion.
Description
Technical field
The present invention relates to phase difference value measurements in technical field of liquid crystal display more particularly to a kind of liquid crystal display compensation film surface
Method and device.
Background technique
As the viewing angle of liquid crystal display increases, the contrast of picture is constantly reduced, the clarity decline of picture.This
Be liquid crystal molecule in liquid crystal layer birefringence with viewing angle variation change as a result, using wide viewing angle compensation film carry out
Compensation, can be effectively reduced the light leakage of dark-state picture, the contrast of picture can be increased substantially in certain visual angle.
Compensation film will affect with phase difference value Rth, the Ro of compensation film outside the face of phase difference value Ro and thickness direction in face
To the dark-state light leakage of liquid crystal display panel and taste, so being necessary to the Ro measurement of compensation film in display manufacturing process.
Summary of the invention
The purpose of the present invention is to provide phase difference values in a kind of simple lower-cost liquid crystal display compensation film surface of measurement
Measurement method.
The present invention also provides phase difference value measuring devices in a kind of liquid crystal display compensation film surface.
To achieve the goals above, embodiment of the present invention provides the following technical solutions:
Phase difference value measurement method in the liquid crystal display compensation film surface, including,
Simulate the light leakage variation of phase difference value in liquid crystal display difference compensation film surface；
Phase difference value in compensation film surface is selected to obtain different compensation film surfaces as benchmark according to the variation of the light leakage of the simulation
The ratio multiple of phase difference value in interior phase difference value and benchmark compensation film surface；
Phase difference value and light leakage multiple proportion formula in compensation film surface are fitted by the ratio multiple；
Using the liquid crystal display compensation film of phase difference value in known compensation film surface as the benefit of the reference measurement liquid crystal display
Repay the light leakage value of film；And
Measure the light leakage value of the liquid crystal display compensation film of phase difference value in compensation film surface to be measured；
Obtain the light leakage value and the reference measurement liquid of the liquid crystal display compensation film of phase difference value in measurement compensation film surface to be measured
The light leakage ratio of the light leakage value of the compensation film surface of crystal display；
The light leakage ratio is brought into the compensation film surface fitted in phase difference value and light leakage multiple proportion
Calculate phase difference value in liquid crystal display compensation film surface to be measured.
Wherein, it is the optical axis in compensation film that the simulation liquid crystal display difference, which compensates the light leakage variation of phase difference value in film surface,
With the optical axis of the polaroid of liquid crystal display in being carried out under conditions of 45 degree of angles.
Wherein, the light leakage variation of phase difference value includes in the step simulation liquid crystal display compensation film surface, two adjacent
Phase difference value is chosen according to a certain percentage in different sides.
Wherein, the known liquid crystal display compensation film for compensating phase difference value in film surface of step is as the reference measurement liquid crystal display
The light leakage value of compensation film；And the measurement light leakage value to be measured for compensating the liquid crystal display compensation film of phase difference value in film surface, it is to choose
Same backlight.
Wherein, the light leakage variation of phase difference value includes in the step simulation liquid crystal display compensation film surface, to lower than liquid crystal
Display compensation film carries out phase in simulation liquid crystal display difference compensation film surface using phase difference value in the compensation film surface of critical field
The light leakage of difference changes.
Wherein, in the compensation film surface of simulation when phase difference value 48nm, phase difference value and brightness relationship in falseface are fitted
Formula is Y=7.5553X3-34.003X2+ 68.327X+7.14, wherein X is to obtain to measure phase difference value in compensation film surface to be measured
The light leakage ratio of the light leakage value of the compensation film surface of the light leakage value and reference measurement liquid crystal display of liquid crystal display compensation film；Y is
Need to measure phase difference value in compensation film surface to be measured.
Phase difference value measuring device in liquid crystal display compensation film surface of the present invention, including,
Analog module, for simulating the light leakage variation of phase difference value in liquid crystal display compensation film surface, to choose different compensation
Phase difference value is as benchmark in film surface；
First obtain module, for according to the light leakage of the simulation variation select compensate film surface in phase difference value as base
Standard obtains the ratio multiple that phase difference value and the benchmark in different compensation film surfaces compensate phase difference value in film surface；
Fitting module, for fitting phase difference value and light leakage multiple proportion in compensation film surface according to the ratio multiple
Formula；
First measurement module, for using the liquid crystal display compensation film of phase difference value in known compensation film surface as reference measurement
The light leakage value of the compensation film of the liquid crystal display；
Second measurement module, for measuring the light leakage value of the liquid crystal display compensation film of phase difference value in compensation film surface to be measured；
Second obtains module, for obtaining the light leakage for measuring the liquid crystal display compensation film of phase difference value in compensation film surface to be measured
The light leakage ratio of value and the light leakage value of the compensation film surface of the reference measurement liquid crystal display；
The light leakage ratio is brought into phase difference value and light leakage times in the compensation film surface fitted by computing module
Phase difference value in prepare liquid crystalline substance display compensation film surface is calculated in number relationship.
Wherein, changed by the light leakage of phase difference value in LCD simulation softwares analog compensation film different sides.
It wherein, further include measurement turntable, the base of the liquid crystal display compensation film of phase difference value in the known compensation film surface
Quasi- side and measurement it is to be measured compensation film surface in phase difference value liquid crystal display compensation film benchmark become with the rotation stage fiducial
While passing through first measurement module and second measurement module at 45 degree of angles of turntable to it.
Wherein, first measurement module with second measurement module is measured under same backlight.
The embodiment of the present invention have the following advantages that or the utility model has the advantages that
The measurement equipment and method for measurement of phase difference value Ro in compensation film different sides of the invention.Measure it is at low cost, fast,
It is convenient and accurate.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is phase difference value measuring method flow chart in liquid crystal display compensation film surface of the present invention；
Fig. 2 is to simulate liquid crystal display difference compensation film in phase difference value measurement method in liquid crystal display compensation film surface of the present invention
The light leakage variation diagram of phase difference value in face；
Fig. 3 is to change Central Shanxi Plain R0=with the light leakage of phase difference value in simulation liquid crystal display difference compensation film surface described in Fig. 2
Phase difference value and multiple proportion figure in compensation film surface on the basis of 12nm；
Fig. 4 is to change Central Shanxi Plain R0=with the light leakage of phase difference value in simulation liquid crystal display difference compensation film surface described in Fig. 2
Phase difference value and multiple proportion figure in compensation film surface on the basis of 48nm；
Fig. 5 is to change Central Shanxi Plain R0=with the light leakage of phase difference value in simulation liquid crystal display difference compensation film surface described in Fig. 2
Phase difference value and multiple proportion figure in compensation film surface on the basis of 84nm；
Fig. 6 is to change Central Shanxi Plain R0=with the light leakage of phase difference value in simulation liquid crystal display difference compensation film surface described in Fig. 2
Phase difference value and multiple proportion figure in compensation film surface on the basis of 120nm；
Fig. 7 is to change Central Shanxi Plain R0=with the light leakage of phase difference value in simulation liquid crystal display difference compensation film surface described in Fig. 2
Phase difference value and multiple proportion figure in compensation film surface on the basis of 180nm；
Fig. 8 is in liquid crystal display compensation film surface of the present invention in phase difference value measurement method, according to working standard R0 value in R0
A small range simulates the light leakage variation diagram of phase difference value in liquid crystal display difference compensation film surface；
Fig. 9 is to change Central Shanxi Plain R0=with the light leakage of phase difference value in simulation liquid crystal display difference compensation film surface described in Fig. 8
Phase difference value and multiple proportion figure in compensation film surface on the basis of 48nm；
Figure 10 is that liquid crystal display liquid crystal of the invention measures apparatus module figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiments shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, is also possible to detachably connected, or integrally connects
It connects；It can be mechanical connection；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The connection in portion.For the ordinary skill in the art, the tool of above-mentioned term in the present invention can be understood with concrete condition
Body meaning.
Referring to Fig. 1, first embodiment of the invention provides phase difference value measurement method in the liquid crystal display compensation film surface,
Including,
Refering to figure Fig. 2, step S1, the light leakage variation of phase difference value in liquid crystal display difference compensation film surface is simulated；This step
The relation curve of phase difference value and light leakage (brightness) in different compensation film surfaces is obtained, phase difference in film surface is wherein compensated in abscissa
To carry out choosing simulation according to a certain percentage between value；In the present embodiment, it is preferred that the simulation steps are the light in compensation film
The optical axis of the polaroid of axis and liquid crystal display be in 45 degree of angles under conditions of carry out, it is corresponding to obtain phase difference value in different sides
Brightness value.In other embodiments, which is the optical axis in the polaroid of the optical axis and liquid crystal display of compensation film
It can be other angles.
Step S2 selects phase difference value in compensation film surface to obtain different as benchmark according to the variation of the light leakage of the simulation
Compensate the ratio multiple that phase difference value and the benchmark in film surface compensate phase difference value in film surface；Refering to Fig. 3, with phase difference in face
On the basis of value R0=12nm, ratio multiple is determined, such as Fig. 3 abscissa.It is referred to the abscissa of Fig. 2, in other embodiments,
The value of phase difference value R0 can be 24nm, 48nm, 84nm, 120nm and 180nm in face.
Such as Fig. 3, step S3, phase difference value and light leakage multiple proportion in compensation film surface are fitted by the ratio multiple
Formula；The present embodiment is on the basis of R0=12nm, fitting formula Y=0.00003561X3-0.01137048X2+1.95339053X
+16.4.Wherein Y is phase difference value in compensation film surface, and X is ratio multiple.
Step S4, using the liquid crystal display compensation film of phase difference value in known compensation film surface as the reference measurement liquid crystal display
The light leakage value Lv1 of compensation film.
Step S5 measures the light leakage value Lv2 of the liquid crystal display compensation film of phase difference value in compensation film surface to be measured.Wherein, it walks
Compensate film surface of the liquid crystal display compensation film of phase difference value as the reference measurement liquid crystal display in rapid known compensation film surface
Light leakage value；And the measurement light leakage value to be measured for compensating the liquid crystal display compensation film of phase difference value in film surface, it is to choose same backlight.
It the use of measuring device include turntable, the objective table equipped with true edge and brightness measurement in step S4 and step S5
Instrument, it is known that the liquid crystal display compensation film of phase difference value and the measurement liquid crystal to be measured for compensating phase difference value in film surface in compensation film surface
Show that compensation film is put on the objective table of true edge respectively and with true edge to it, after light passes through the compensation film by objective table
Into the brightness measurer.
Step S6 obtains the light leakage value of the liquid crystal display compensation film of phase difference value and benchmark in measurement compensation film surface to be measured and surveys
Measure the light leakage ratio of the light leakage value of the compensation film surface of the liquid crystal display；The ratio of namely Lv2 and Lv1.
The light leakage ratio is brought into phase difference value and light leakage multiple in the compensation film surface fitted by step S7
Phase difference value in prepare liquid crystalline substance display compensation film surface is calculated in relational expression.Relational expression is the Y=0.00003561X3-
0.01137048X2+1.95339053X+16.4。
On the basis of the present embodiment step S2, respectively with the value of phase difference value R0 in face for 48nm, 84nm, 120nm and
180nm is fitted to obtain phase difference value and light leakage multiple proportion formula in compensation film surface.It is specific as follows:
As shown in figure 4, when the value of R0 is 48nm, phase difference value formula in the corresponding compensation film surface that is fitted are as follows: Y
=0.13405X3-2.75169X2+30.38781X+16.4。
As shown in figure 5, when the value of R0 is 84nm, phase difference value formula in the corresponding compensation film surface that is fitted are as follows: Y
=3.3009X3-23.29X2+88.407X+16.4。
As shown in fig. 6, when the value of R0 is 120nm, phase difference value formula in the corresponding compensation film surface that is fitted are as follows:
Y=21.69366X3-81.71592X2+165.59725X+16.4。
As shown in fig. 7, when the value of R0 is 180nm, phase difference value formula in the corresponding compensation film surface that is fitted are as follows:
Y=134.831X3-276.235X2+304.466X+16.4.Wherein, wherein Y is phase difference value in compensation film surface, and X is ratio times
Number.
Referring to Fig. 8, further, the light leakage of phase difference value changes packet in the step simulation liquid crystal display compensation film surface
It includes, is mended to simulation liquid crystal display difference is carried out using phase difference value in the compensation film surface of critical field lower than liquid crystal display compensation film
Repay the light leakage variation of phase difference value in film surface.Phase difference value is generally in 50nm, this method with 50nm in common compensation film surface
Phase difference value in the compensation film surface of phase difference value in the face of a small range is measured for reference.
Fig. 9 is please referred to specifically, obtaining in the compensation film surface of simulation on the basis of phase difference value 48nm by the above method
Compensate phase difference value 48nm and phase difference value ratio multiple in different sides in film surface.Then be fitted falseface in phase difference value with it is bright
Degree relational expression is Y=7.5553X3-34.003X2+ 68.327X+7.14, wherein X is to obtain to measure phase in compensation film surface to be measured
The light leakage ratio of the light leakage value of the compensation film surface of the light leakage value and reference measurement liquid crystal display of the liquid crystal display compensation film of difference
Value；Y is phase difference value in the compensation film surface to be measured of phase difference value in the compensation film surface lower than critical field.In the present embodiment, mend
The ratio for repaying phase difference value in different compensation film surfaces on the abscissa in film surface on the basis of phase difference value 48nm is smaller, such as 4.8,
9.6。
Referring to Fig. 10, phase difference value measuring device in liquid crystal display compensation film surface of the present invention, including,
Mould 10 is simulated, for simulating the light leakage variation of phase difference value in liquid crystal display compensation film surface, to choose different compensation
Phase difference value is as benchmark in film surface；
First obtain module 20, for according to the light leakage of the simulation variation select compensate film surface in phase difference value as base
Standard obtains the ratio multiple that phase difference value and the benchmark in different compensation film surfaces compensate phase difference value in film surface；
Fitting module 30, for fitting phase difference value and light leakage multiple proportion in compensation film surface according to the ratio multiple
Formula；
First measurement module 40, for being surveyed using the liquid crystal display compensation film of phase difference value in known compensation film surface as benchmark
Measure the light leakage value of the compensation film of the liquid crystal display；
Second measurement module 50, for measuring the light leakage of the liquid crystal display compensation film of phase difference value in compensation film surface to be measured
Value；
Second obtains module 60, for obtaining the leakage for measuring the liquid crystal display compensation film of phase difference value in compensation film surface to be measured
The light leakage ratio of the light leakage value of the compensation film surface of light value and the reference measurement liquid crystal display；
The light leakage ratio is brought into phase difference value and light leakage in the compensation film surface fitted by computing module 70
Phase difference value in prepare liquid crystalline substance display compensation film surface is calculated in multiple proportion.
Wherein, changed by the light leakage of phase difference value in LCD simulation softwares analog compensation film different sides.
It wherein, further include measurement turntable, the base of the liquid crystal display compensation film of phase difference value in the known compensation film surface
Quasi- side and measurement it is to be measured compensation film surface in phase difference value liquid crystal display compensation film benchmark become with the rotation stage fiducial
While passing through first measurement module and second measurement module at 45 degree of angles of turntable to it.
Wherein, first measurement module with second measurement module is measured under same backlight.
In the present embodiment, changed by the light leakage that LCD simulation softwares simulate phase difference value in different compensation film surfaces.Tool
Body is LCD Master.
The measurement equipment and method for measurement of phase difference value Ro in compensation film different sides of the invention.Measure it is at low cost, fast,
It is convenient and accurate.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (10)
1. phase difference value measurement method in a kind of liquid crystal display compensation film surface, which is characterized in that including,
Simulate the light leakage variation of phase difference value in liquid crystal display difference compensation film surface；
Phase difference value in compensation film surface is selected to obtain as phase difference value in benchmark compensation film surface according to the variation of the light leakage of the simulation
Take the ratio multiple of phase difference value and phase difference value in benchmark compensation film surface in different compensation film surfaces；
Phase difference value and light leakage multiple proportion formula in compensation film surface are fitted by the ratio multiple；
Using the liquid crystal display compensation film of phase difference value in known compensation film surface as the leakage of the reference measurement liquid crystal display compensation film
Light value；And
Measure the light leakage value of the liquid crystal display compensation film of phase difference value in compensation film surface to be measured；
Obtain the light leakage value and the reference measurement liquid crystal of the liquid crystal display compensation film of phase difference value in measurement compensation film surface to be measured
Show the light leakage ratio of the light leakage value of the compensation film surface of device；
Phase difference value in the compensation film surface fitted described in light leakage ratio substitution is fallen into a trap with light leakage multiple proportion formula
Calculate phase difference value in liquid crystal display compensation film surface to be measured.
2. phase difference value measurement method in liquid crystal display compensation film surface as described in claim 1, which is characterized in that the simulation
The light leakage variation of phase difference value is the polaroid of optical axis and liquid crystal display in compensation film in liquid crystal display difference compensation film surface
Optical axis carried out under conditions of 45 degree of angles.
3. phase difference value measurement method in liquid crystal display compensation film surface as described in claim 1, which is characterized in that the step
The light leakage variation of phase difference value includes that phase difference value is according to default in two different sides in simulation liquid crystal display difference compensation film surface
Ratio is chosen.
4. phase difference value measurement method in liquid crystal display compensation film surface as described in claim 1, which is characterized in that known to step
Compensate the light leakage value that compensates film surface of the liquid crystal display compensation film of phase difference value in film surface as the reference measurement liquid crystal display；
And the measurement light leakage value to be measured for compensating the liquid crystal display compensation film of phase difference value in film surface, it is to choose same backlight.
5. phase difference value measurement method in liquid crystal display compensation film surface as claimed in claim 3, which is characterized in that the step
The light leakage variation of phase difference value includes using critical field to lower than liquid crystal display compensation film in simulation liquid crystal display compensation film surface
Compensation film surface in phase difference value carry out simulation liquid crystal display difference compensation film surface in phase difference value light leakage variation.
6. phase difference value measurement method in liquid crystal display compensation film surface as claimed in claim 5, which is characterized in that in simulation
When compensating phase difference value 48nm in film surface, phase difference value and the brightness relationship formula in falseface of being fitted are Y=7.5553X3-
34.003X2+ 68.327X+7.14, wherein X is the liquid crystal display compensation film for obtaining phase difference value in measurement compensation film surface to be measured
Light leakage value and the reference measurement liquid crystal display compensation film surface light leakage value light leakage ratio；Y is to need to measure benefit to be measured
Repay phase difference value in film surface.
7. phase difference value measuring device in a kind of liquid crystal display compensation film surface, which is characterized in that including,
Analog module, for simulating the light leakage variation of phase difference value in liquid crystal display compensation film surface, to choose different compensation film surfaces
Interior phase difference value is as benchmark；
First obtain module, for according to the light leakage of the simulation variation select compensation film surface in phase difference value as benchmark compensation
Phase difference value in film surface obtains the ratio times that phase difference value and the benchmark in different compensation film surfaces compensate phase difference value in film surface
Number；
Fitting module, for fitting phase difference value and light leakage multiple proportion formula in compensation film surface according to the ratio multiple；
First measurement module, for using the liquid crystal display compensation film of phase difference value in known compensation film surface as the reference measurement liquid
The light leakage value of the compensation film of crystal display；
Second measurement module, for measuring the light leakage value of the liquid crystal display compensation film of phase difference value in compensation film surface to be measured；
Second obtain module, for obtains measure it is to be measured compensation film surface in phase difference value liquid crystal display compensation film light leakage value and
The light leakage ratio of the light leakage value of the compensation film surface of the reference measurement liquid crystal display；
Computing module, phase difference value and light leakage multiple pass in the compensation film surface fitted described in light leakage ratio substitution
Phase difference value in prepare liquid crystalline substance display compensation film surface is calculated in system.
8. phase difference value measuring device in liquid crystal display compensation film surface as claimed in claim 7, which is characterized in that pass through LCD
The light leakage variation of phase difference value in simulation softwares analog compensation film different sides.
9. phase difference value measuring device in liquid crystal display compensation film surface as claimed in claim 7, which is characterized in that further include surveying
Turntable is measured, the true edge and measurement compensation film to be measured of the liquid crystal display compensation film of phase difference value in the known compensation film surface
The true edge of the liquid crystal display compensation film of phase difference value is aligned with the turntable true edge in face, in 45 degree of angle feelings of turntable
Pass through first measurement module and second measurement module under condition.
10. phase difference value measuring device in liquid crystal display as claimed in claim 7 compensation film surface, which is characterized in that described the
One measurement module with second measurement module is measured under same backlight.
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| CN1688906A (en) * | 2002-10-15 | 2005-10-26 | 日东电工株式会社 | Optical film and liquid crystal display |
| CN1758078A (en) * | 2004-10-07 | 2006-04-12 | 日东电工株式会社 | Retardation-film integrated polarizing plate and method of manufacturing the same |
| CN101140334A (en) * | 2006-09-05 | 2008-03-12 | 东曹株式会社 | Optical compensation film and retardation film |
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