Transflective liquid crystal display with partial switching
AssigneesUniversity of Central Florida Research Foundation, Inc., Toppoly Optoelectronics Corp.
InventorsWing Kit Choi, Shin-Tson Wu
Life of this patent
Estimating the term…
Abstract
A high reflection and transmission transflective liquid crystal display (TLCD) that requires only a single cell gap. Instead of reducing the cell gap of the R sub-pixel region, the invention reduces the birefringence change Δn of reflective pixels(R) so that the total retardation change Δnd of R is equal to that of the transmissive pixels (T). This is realized by a partial switching of the pixels of approximately 45 degrees which occurs in the reflective pixel(R) region of the single cell gap by applying fringing fields, generated by a discontinuous electrode, to the molecules in the reflective pixel(R) region of the cell gap.
Claims17
A method of producing high reflection(R) and transmission(T) transflective liquid crystal displays(LCDs) with a single gap, comprising the step of:
- reducing the birefringence change Δn of reflective pixels(R) in a single gap liquid crystal display(LCD) so that total retardation Δnd of the reflective pixels(R) is approximately equal to total retardation Δnd of transmissive pixels in the single gap LCD.
A high reflection(R) and transmission(T) transflective liquid crystal display(TLCD), comprising:
- a single gap liquid crystal display(LCD) having transmissive pixels(T) and reflective pixels(R);
- and,
- means for reducing the birefringence change Δn of reflective pixels(R) in a single gap liquid crystal display(LCD) so that total retardation Δnd of the reflective pixels(R) is approximately equal to the total retardation Δnd of the transmissive pixels in the single gap LCD.
Dependencies are inferred from the claim text.