Sheet-like light source device
US6561664B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Apr 4, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2111/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sheet-like light source device of edge-light type comprising at least a light source, a light-conducting plate and a retention member for retaining the light-conducting plate. At least one convex portion or concave portion is provided on a lateral surface portion of the light-conducting plate other than a light-incident portion with the light-conducting plate being held in a specified positional relationship by means of the retention member formed with a concave portion or a convex portion which fits with the convex portion or concave portion of the light-conducting plate. A light-absorbing means is provided on at least a surface portion of either surface of the concave portion or convex portion of the retention member. It is possible to eliminate occurrence of abnormal emission of light and decreases in luminance so that the display quality of the display might be maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.