Backlight device and color liquid crystal display apparatus
US7663714B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2005 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Aug 19, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133624
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a backlight device used for a color liquid crystal display (LCD) apparatus. The red light, green light and blue light, generated by a light source, made up by a red light emitting diode (21R), a green light emitting diode (21G) and a blue light emitting diode (21B), respectively, are mixed together to generate white light. The red light has a half-value width hwr such that 15 nm≦hwr≦30 nm, and the green light has a half-value width hwg such that 25 nm≦hwg≦50 nm. The blue light has a half-value width hwb such that 15 nm≦hwb≦30 nm. The white light illuminates a transmissive color liquid crystal display panel (10) from its back side. The transmissive color liquid crystal display panel includes a color filter (19) made up by a tristimulus filter for wavelength-selecting and transmitting red light, green light and blue light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.