Low cost backlight module and display device
US10802332B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 2018 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | May 3, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention discloses a low-cost backlight module including a plurality of light source assemblies arranged in an array, and a reflector as well as a diffuser plate both disposed beside each light source assembly, wherein the reflector includes a circle of side reflection wall arranged annularly around the light source assembly, each of the light source assemblies includes a plurality of spot light sources spaced apart circumferentially and faced toward the side reflection wall, and the light emitted by the spot light source toward the side reflection wall is reflected by the side reflection wall and then emitted out from the diffuser plate. This invention further discloses a display device. An area of the diffuser plate that is emitted by each spot light source is enlarged and the emitted light becomes more uniform. The number of spot light sources is reduced and the problem of LED Mura is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.