Light guide member and light guide member manufacturing method
US10295725B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2015 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Mar 27, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2033/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light guide member includes a reflective surface with a diffusion groove array. The diffusion groove array includes diffusion grooves arranged in the reflective surface in a length direction of the light guide member. The diffusion groove array includes, as the diffusion grooves, at least two inspection grooves and a non-inspection diffusion groove. The two inspection grooves are spaced in the length direction of the light guide member. The non-inspection diffusion groove is between the two inspection grooves. An intermediate part, in a length direction, of each of the two inspection grooves is divided by an ungrooved portion with no groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.