Light emitting device and display equipment
US9960327B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 30, 2015 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Jan 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B19/0061
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Embodiments of the present disclosure provide a light emitting device and display equipment. The light emitting device, includes a light emitting diode (LED) and an optical lens, the optical lens including a light incident surface and a light emergent surface, the light incident surface including a free-form convex surface; wherein there is a first angle between a symmetry axis and the connecting line between the center point of the light emitting surface and any point on the light incident surface, and the curvature of the light incident surface decreases with the increase of the first angle; there is a second angle between a symmetry axis and the connecting line between the center point of the light emitting surface and any point on the light emergent surface, and the curvature of the light emergent surface increases with the increase of the second angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.