Very Thin Achromatic Quarter Wave Film Laminate for Transflective LCD and Method for Producing the Same
First Claim
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1. A very thin achromatic quarter wave film laminate for transflective LCD comprising:
- a lower phase difference film;
an orientation film coated on the lower phase difference film;
an upper phase difference film coated on the orientation film,wherein the lower phase difference film and the upper phase difference film are made of liquid crystal, andwherein one selected from the lower phase difference film and the upper phase difference film is a ¼
wavelength phase difference film and the other is a ½
wavelength phase difference film.
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Abstract
Disclosed herein is an very thin achromatic quarter wave film laminate for transflective LCD included in an LCD polarizer. More specifically, the very thin achromatic quarter wave film laminate for transflective LCD has a considerably reduced thickness, as compared to conventional quarter wave films in which anisotropic polymeric films are laminated.
12 Citations
22 Claims
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1. A very thin achromatic quarter wave film laminate for transflective LCD comprising:
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a lower phase difference film; an orientation film coated on the lower phase difference film; an upper phase difference film coated on the orientation film, wherein the lower phase difference film and the upper phase difference film are made of liquid crystal, and wherein one selected from the lower phase difference film and the upper phase difference film is a ¼
wavelength phase difference film and the other is a ½
wavelength phase difference film. - View Dependent Claims (2, 3, 4, 5, 7, 8)
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6. (canceled)
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9. The very thin achromatic quarter wave film laminate for transflective LCD according to clain 1, wherein the ¼
- wavelength phase difference film and the ½
wavelength phase difference film are arranged such that the ¼
wavelength phase difference film crosses the ½
wavelength phase difference film at an angle of 60 to 90 degrees.
- wavelength phase difference film and the ½
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10. A method for manufacturing a very thin achromatic quarter wave film laminate for transflective LCD comprising:
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preparing a polymeric substrate oriented in a specific direction; coating a liquid crystal solution on the polymeric substrate; subjecting the coating to drying and UV curing to form a lower liquid crystal layer; coating a solution for an orientation film on the lower liquid crystal layer; drying the coating to form an orientation film; imparting orientation to the orientation film via polarization UV radiation or rubbing; coating a liquid crystal solution on the orientation film; and subjecting the coating to drying and UV curing to form a upper liquid crystal layer, wherein one selected from the lower phase difference film and the upper phase difference film is formed of a ¼
wavelength phase difference film, and the other is formed of a ½
wavelength phase difference film. - View Dependent Claims (11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22)
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15. (canceled)
Specification