High-intensity light display device
US5227773A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Jun 26, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4298
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A display device which is especially suited for application as a center-high-mounted stop-light (CHMSL) or brake light for an automotive vehicle includes a white linear light source. A coupler panel or sheet formed of a fluorescent dye-doped material couples light from one edge therethrough to an opposite edge from the light source to a light receiving edge of a display panel. The coupler panel transmits red light therethrough, absorbs other colors of light, and re-emits the absorbed light as red light. The display panel has a first surface formed with optical quality, light reflecting grooves, which reflect and disperse the edge coupled light out a second surface which is opposite to the first surface. Each groove includes a series of laterally spaced curved light dispersing depressions. The display panel viewed from the first surface is transparent at all times. The display panel viewed from the second surface produces a red light pattern reflected from the grooves when the light source is turned on, and appears transparent when the light source is turned off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.