Multi-color display device
US6580482B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1999 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Nov 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13718
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A reflective-type multi-color display device is capable of obtaining a vivid and bright multi-color display with less display layers, and therefore, with a state where a parallax is decreased and a cost of the device can be reduced. Specifically, the display device of the present invention includes a cell 51 having a display layer 31 comprising a right-handed cholesteric liquid crystal which selects and reflects blue, a cell 53 having a display layer 33 comprising a left-handed cholesteric liquid crystal which selects and reflects green, a cell 57 having a display layer 37 comprising a right-handed cholesteric liquid crystal which selects and reflects yellow and a cell 55 having a display layer 35 comprising a left-handed cholesteric liquid crystal which selects and reflects red, these layers being laminated in this order from the observation side. A color filter 43 which transmits red and absorbs the other color light is provided between the cell 57 and the cell 55. A black light-absorbing layer 41 is formed at the back side of the cell 55.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.