Backlight units with support posts and cavity height monitoring
US10969628B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2018 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | May 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electronic device may have a display with a backlight. The backlight provides backlight illumination for an array of pixels that is displaying images. The backlight may include an array of cells. Each cell may contain a light source with one or more light-emitting diodes and a cavity reflector that reflects light from the light source outwardly through a diffuser for use in forming the backlight illumination. The light sources may be mounted to a printed circuit. Support posts on the printed circuit may be used to maintain the diffuser at a fixed distance from the printed circuit. The support posts may have opposing first and second ends. The first ends may be attached to the diffuser with fixed connections such as adhesive connections. The second ends may be attached to the printed circuit using floating connections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.