2D/3D mode-switchable electronic display with dual layer backlight
US10810917B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2018 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Jan 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A dual layer backlight employs a first planar backlight to emit light and a second planar backlight to provide a plurality of coupled-out light beams. The second planar backlight includes a plate light guide and a multibeam diffraction grating configured to diffractively couple out a portion of a guided light beam within the plate light guide as the plurality of coupled-out light beams. A light beam of the coupled-out light beam has a different principal angular direction from other light beams of the coupled-out light beam plurality. A two-dimensional/three-dimensional (2D/3D) mode-switchable electronic display includes the dual layer backlight and a light valve array configured to selectively modulate emitted light as 2D pixels in a first mode and the coupled-out light beams as 3D pixels corresponding to the different 3D views in a second mode of the electronic display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.