Structure of a reflective optically self-compensated liquid crystal display
OwnerHong-Da Liuinventor
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Abstract
A structure of a reflective optically self-compensated liquid crystal display comprises a substrate having a transparent common electrode layer, a substrate having a reflective pixel electrode layer, a polarizer, a series of retardation films, and a uniformly distributed layer of liquid crystals disposed between the two electrode layers. The retardation films serve as a phase compensator. A single circular polarization mode in corporation with birefringence property of the liquid crystal layer and angular optimization among the polarizer, the retardation films and the liquid crystals are used to reduce the light leakage at the dark state on the full spectrum of a visible light. An optically self-compensated effect of the liquid crystal display is achieved.
Claims28
A structure of a reflective optically self-compensated liquid crystal display, comprising:
- an upper substrate having a common electrode layer formed underneath, said common electrode layer being transparent;
- a lower substrate having a pixel electrode layer formed thereon, said pixel electrode layer comprising a reflective device;
- at lease one retardation film formed above said upper substrate;
- a polarizer formed on said at least one retardation film;
- and
- a uniformly distributed layer of liquid crystals disposed between said common and pixel electrode layers, said liquid crystals having liquid crystal molecules horizontally aligned when no driving voltage is applied and said liquid crystal molecules having an averaging pointing director which forms a non-zero angle with said polarizer;
- wherein incident lights pass through said polarizer, form linear polarization, and then form nearly circular polarization after passing through said at least one retardation film and said layer of liquid crystals when a driving voltage is applied, and the incident lights are reflected by said reflective device and form nearly linear polarization perpendicular to said polarizer after passing through said at least one retardation film and said layer of liquid crystals.
Dependencies are inferred from the claim text.