Illumination device
US10989858B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2020 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Nov 20, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0083
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination device according to one or more embodiments may include flat light guide plate units each including: a light guide plate, a light source unit, a cover covering a light emission surface of the light guide plate, and a case positioned on a back surface side of the light guide plate; and a base to which the light guide plate units are attached. The attachment surface may be divided into sections for attaching the light guide plate units such that the light guide plate units are laid over the attachment surface. Each of the sections may be provided with a circuit board for driving the light source unit, and a fixing portion for detachably fixing the light guide plate unit to the base. Each of the light guide plate units includes a visible sheet positioned between the light guide plate and the case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.