Optical projection device for household projectors
US11294268B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2021 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | Aug 20, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/2066
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention discloses an optical projection device for household projectors, comprising light source, light-concentrating component, liquid crystal display and imaging component, wherein light source, light-concentrating component, liquid crystal display and imaging component are arranged in a coaxial arrangement; the light-concentrating component comprises a first lens and a second lens; the imaging component comprises a third lens, a fourth lens and a fifth lens arranged side by side and coaxially in sequence. Compared with the prior art, in the invention, the light can be concentrated on the liquid crystal display by arranging the first lens and the second lens side by side and coaxially, and evenly illuminate the liquid crystal display; the first lens and the second lens are set as high-order aspherical lens members, which can realize the miniaturization of optical projection device and improve the image quality of household projectors, and thereby effectively improving user experience.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.