Diffuser plate, display device, projection device, and lighting device
US10859735B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2016 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Mar 16, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is provided a diffuser plate, a display device, a projection device, and a lighting device that can achieve more even diffusion angle distribution properties, the diffuser plate being of a microlens array type, and including: a single lens group located on a surface of a transparent base material, in which aperture sizes and radii of curvatures of respective single lenses constituting the single lens group vary in the single lens group as a whole, and vertex positions of the respective single lenses are located irregularly, and energy distribution of light that transmits through the single lens group is substantially even in a predetermined diffusion angle range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.