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| Optical design |
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Description
Crysoptix coatable Thin Birefringent Film™ (TBF™) retarders can be efficiently used for compensation of ubiquitous VA and IPS LCD modes as well as for developing custom solutions for various optical applications. Crysoptix TBF™ coating technology provides an efficient low-cost solution for patterning internal and external retarders for 3D LCD TV.
The examples below are not intended to be an exhaustive list of targeted LCD designs, but allow to illustrate several important applications of new materials. |
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Retarders classification |
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VA mode LCD
There are several ways to compensate vertical alignment mode LCD with Crysoptix retarders:
1. Compensation with two biaxial BA-plate retarders.
2. Compensation with negative C-plate and positive A-plate retarders. |
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1. Compensation with two biaxial BA-plate retarders
The biaxial BA-plate retarder (only 0.3 μm thick) is coated on conventional TAC film and laminated with PVA polarizer. |
Contrast ratio viewing angle map is shown on the right figure. |
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2. Compensation with negative C-plate and positive A-plate retarders
The negative C plate retarder (only 1.4 μm thick) is coated on birefringent polymer film (e.g., PET or OPP) or on LC cell glass. |
Contrast ratio viewing angle map is shown on the right figure. |
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IPS mode LCD
There are several ways to compensate in-plane switching mode LCD with Crysoptix retarders:
1. Compensation with single biaxial BA-plate retarder.
2. Compensation with biaxial BA-plate retarder and positive A-plate. |
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1. Compensation with single biaxial BA-plate retarder
The biaxial BA-plate retarder (only 0.4 μm thick) is coated on conventional TAC film and laminated with PVA polarizer. |
Contrast ratio viewing angle map is shown on the right figure. |
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2. Compensation with biaxial BA-plate retarder and positive A-plate
The biaxial BA-plate retarder (only 0.7 μm thick) is coated on coated either on birefringent positive A-plate polymer film (e.g., PET or OPP) or on LC cell glass. |
Contrast ratio viewing angle map is shown on the right figure.
The design possesses an improved spectral performance due to anomalous dispersion of birefringence. |
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Note: TAC = triacetyl cellulose, PET = polyethylene terephthalate, OPP = oriented polypropylene, PVA = polyvinyl alcohol |
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3D displays
Crysoptix TBF™ retarder can be patterned on plastic and glass substrate for application in stereoscopic displays enabling 3D effect. |
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OLED and other applications
Crysoptix positive A-plate retarder can be used as quarterwave and halfwave plates.
For example, quarterwave positive A-plate retarder together with front polarizer can be used in OLED display for cancelling ambient illumination and better display viewing performance.
For special application purpose, we can coat retarders with arbitrary desired retardation value. |
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