Light-emitting device and backlight module
US11855243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2021 |
| Grant date | Dec 26, 2023 |
| Priority date | — |
| Expiry date | Aug 31, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/855
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light-emitting device is applicable to a backlight module. The light-emitting device includes a substrate, a light-emitting diode (LED) and an encapsulation body. The encapsulation body is on the substrate and covers the LED. The encapsulation body includes a base and a lens. The base has a base surface. The lens has a lens surface. The lens surface conforms to a cubic Bezier curve. The cubic Bezier curve has a start point and an end point. The start point of the cubic Bezier curve is at the base surface. The end point of the cubic Bezier curve corresponds to the center of the LED. The lens surface is provided with a concave portion at the end point. The lens increases the light-emitting angle of the LED, so that the spacing between light-emitting devices can be increased, thereby reducing the number of light-emitting devices to be used and the costs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.