Vertically aligned liquid crystal display device having an optimized viewing angle
First Claim
1. A display device of a reflective type, the display device comprising:
- a first substrate comprising a color filter array panel;
a second substrate comprising a TFT array panel, the second substrate positioned parallel to the first substrate;
a liquid crystal layer interposed between the first and second substrates;
a single compensation film coupled only to the first substrate;
a polarization film coupled to the compensation film; and
a reverse dispersion phase difference film located between the compensation film and the polarization film,wherein the compensation film has refractive indices nx, ny, and nz that satisfy the relation nx=ny>
nz.
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Accused Products
Abstract
A method of improving the viewing angle of a vertically-aligned liquid crystal display device is presented. The method involves designing a uniaxial compensation film to provide a retardation value of 200 nm or less for light having a wavelength of about 550 nm. Using this uniaxial compensation film, a display device can be built by obtaining a liquid crystal panel with liquid crystal molecules contained between glass substrates, coupling the uniaxial compensation film to at least one of the glass substrates, and coupling a polarization film and electrodes to the compensation film. Preferably, the uniaxial compensation film has a thickness less than or equal to 50 microns. Where there are multiple compensation films, the total thickness and the total retardation values should be considered.
15 Citations
5 Claims
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1. A display device of a reflective type, the display device comprising:
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a first substrate comprising a color filter array panel; a second substrate comprising a TFT array panel, the second substrate positioned parallel to the first substrate; a liquid crystal layer interposed between the first and second substrates; a single compensation film coupled only to the first substrate; a polarization film coupled to the compensation film; and a reverse dispersion phase difference film located between the compensation film and the polarization film, wherein the compensation film has refractive indices nx, ny, and nz that satisfy the relation nx=ny>
nz. - View Dependent Claims (2, 3, 4, 5)
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Specification