Illumination device
US6504598B2 · kind B2 · utility
5Cited by
16References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1999 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Apr 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/73
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination device used in a printing head of a printer, which is capable of switching color of light emitted from a light source quickly. The illumination device has a color wheel that includes at least three grass panels having a fan-like shape and switches the color of light by rotating. The grass panels of the color wheel are supported by a circumferential ring at these exterior circumference. Thereby, the grass panels are hard to be damaged even when the color wheel is rotated at a high speed so as to switch the color of light quickly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.