Optical module and projection apparatus
US11500279B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2020 |
| Grant date | Nov 15, 2022 |
| Priority date | — |
| Expiry date | Dec 23, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/58
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical module and a projection apparatus using the optical module are provided. The optical module includes a base, a first frame, an optical element and at least one driving assembly. The first frame is disposed in the base. The optical element is disposed in the first frame. The at least one driving assembly is disposed between the base and the first frame. The first frame is configured to move relative to the base by a magnetic force generated by the at least one driving assembly. Each of the at least one driving assembly includes a coil and a Halbach array magnet structure, the coil and the Halbach array magnet structure face each other along a first direction, a width of the Halbach array magnet structure in the first direction is W1, and a width of the coil in the first direction is W2, and 0.7≤W1/W2≤2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.