Circuit for liquid crystal display device and electronic equipment
AssigneeSeiko Epson Corporation
InventorTsuyoshi Maeda
Life of this patent
Estimating the term…
Abstract
To provide a liquid crystal display device that can reliably prevent light leakage in between dot display domains at boundaries to prevent decrease in contrast and to suppress color mixing. A semitransmissive reflective layer 18 having a cholesteric liquid crystal layer is arranged in dot display domains D1, and a metal reflective layer 300 is arranged in a BM domain D2 separating the dot display domains D1. The metal reflective layer 300 can alter the rotational direction of reflected circularly polarized light from that before reflection and the device can create high-contrast liquid crystal display.
Claims9
A liquid crystal display device having a liquid crystal cell, the liquid crystal cell comprising a pair of substrates facing each other and a liquid crystal layer disposed between the pair of substrates, the liquid crystal display device comprising:
- a plurality of dot display domains separated by a boundary domain and disposed in a plane;
- specific circularly polarized light introducing means capable of introducing circularly polarized light having a predeterminedrotational direction into between the pair of substrates;
- and
- reflecting means capable of at least reflecting circularly polarized light, the reflecting means comprising rotational direction controlling means capable of controlling the rotational direction of circularly polarized light reflected in the dot display domains so as to differ from that reflected in the boundary domain.
The liquid crystal display device according to any one of clams 3 to 6, further comprising:
- first circularly polarized light introducing means for introducing circularly polarized light through one of the pair of substrates into the liquid crystal layer and serving as the specific circularly polarized light introducing means;
- second circularly polarized light introducing means for introducing circularly polarized light through the other of the pair of substrates and serving as the specific circularly polarized light introducing means, the circularly polarized light having the same rotational direction as the circularly polarized light from the one of the pair of substrates;
- and
- a luminaire for launching light through the other substrate into the liquid crystal cell,
- wherein the liquid crystal layer reverses the polarity of incoming circularly polarized light in one of the case with the application of a selective electric field and the case without the application of a selective electric field and does not in the other case.
Dependencies are inferred from the claim text.