Projection optical path and projection device
US12038681B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2021 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Jun 21, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are a projection optical path and a projection device. The projection optical path includes a first converged light of a first dual-light source system and a second converged light of a second dual-light source system; a first wavelength light, a second wavelength light, and a third wavelength light are respectively one of red light, green light, and blue light; a fourth wavelength light is within a wavelength range of the red light; the wavelength of the fourth wavelength light is defined as λ1; the wavelength of the one set as the red light among the first wavelength light, the second wavelength light, and the third wavelength light is λ2; λ1 is unequal to λ2; an excitation light source emits an excitation light; and the excitation light is emitted to the first dual-light source system or the second dual-light source system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.