Wavelength conversion element and projection device
US12181786B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 2022 |
| Grant date | Dec 31, 2024 |
| Priority date | — |
| Expiry date | Jan 19, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/2066
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A wavelength conversion element includes a rotatable disc, a first spoiler structure and a second spoiler structure. The rotatable disc has a supporting surface and a back surface opposite to the supporting surface. The first spoiler structure is disposed on the supporting surface and arranged along a first track surrounding a center of the rotatable disc. The second spoiler structure is disposed on the back surface and arranged along a second track surrounding the center. A centroid of at least one of the first spoiler structure and the second spoiler structure is deviated from the center. A projection device adopting the aforementioned wavelength conversion element is also provided. The wavelength conversion element of the invention can reduce the initial unbalance and the projection device of the invention can improve the durability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.