Back to results
US 7,064,802 B2Granted
Transflective LCD with common and pixel electrodes on lower substrates spaced at a larger interval in the reflective region
AssigneeAu Optronics Corporation
InventorChing-Huan Lin
Life of this patent
Estimating the term…
Abstract
A pixel device of a transflective liquid crystal display (LCD) having a hybrid alignment nematic liquid crystal layer driven by a lateral electric field. The pixel device of the transflective LCD includes an upper panel and a lower panel, in which the lower panel has an upper surface divided into a reflective region covered with a reflector and a remainder transmission region.
Claims20
A pixel device of a transflective-type LCD, comprising:
- an upper panel;
- a lower panel, located under said upper panel, having an upper surface separated into a reflective region covered with a reflector and a transmission region;
- a hybrid-type nematic LC layer, interposed between said upper panel and said lower panel;
- a first pixel electrode and a first common electrode, formed separately on said reflective region, spaced by a first interval to form a lateral electric field for driving said hybrid-type nematic LC layer;
- and
- a second pixel electrode and a second common electrode, formed separately on said transmission region, spaced by a second interval to form another lateral electric field for driving said hybrid-type nematic LC layer, and said first interval being larger than said second interval;
- wherein, while an operating voltage is applied to said pixel device, a smaller retardation is formed in said hybrid-type nematic LC layer of said reflective region with respect to that of said transmission region.
4 more elements
A pixel device of a transflective LCD panel, comprising:
- an upper panel, having an upper surface, the upper surface further stacking a first polarizer;
- a lower panel, located under said upper panel, further having a lower surface and an opposing upper surface, the lower surface further stacking a QWP and a second polarizer, the upper surface separated into a reflective region covered with a reflector and a transmission region;
- a hybrid-type nematic LC layer, interposed between said upper panel and said lower panel, having quarter-wave retardation when no operation voltage is applied;
- a first pixel electrode and a first common electrode, both with slit in shape formed on said reflective region, spaced by a first interval to form a lateral electric field for driving said hybrid-type nematic LC layer;
- a second pixel electrode and a second common electrode, both with slit in shape formed on said transmission region, spaced by a second interval to form a lateral electric field for driving said hybrid-type nematic LC layer, and said first interval being larger than said second interval;
- wherein, while an operation voltage is applied to said pixel device, half-wave retardation is formed in said hybrid-type nematic LC layer over said reflective region, and three-fourth wave retardation is formed in said hybrid-type nematic LC layer over said transmission region.
3 more elements
Dependencies are inferred from the claim text.