Side-edge type surface light emitting apparatus having light guide plate sandwiched by upper and lower prism sheets
US11762240B2 · kind B2 · utility
0Cited by
2References
20Claims
0Family size
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Key dates
| Filing date | Jul 8, 2022 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | Jul 8, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133607
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A side-edge type surface light emitting apparatus includes: a light guide plate having a first light emitting surface, a light distribution controlling surface, and a light incident surface; a light source; an upper prism sheet disposed on the upper side of the light guide plate, the upper prism sheet having multiple first prisms on a lower side and a second light emitting surface on an upper side; and a first lower prism sheet disposed on the lower side of the light guide plate, the first lower prism sheet having multiple second prims on an upper side and a first flat surface on a lower side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.