Optical unit
US10634303B2 · kind B2 · utility
1Cited by
0References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Sep 22, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2102/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The control part controls a timing of changing the light emission intensity of the first light source and a timing of changing the light emission intensity of the second light source such that a first light-shielding portion is formed in a part of the first irradiation pattern, a second light-shielding portion is formed in a part of the second irradiation pattern so as to overlap with the first light-shielding portion, and a range of the first light-shielding portion and a range of the second light-shielding portion are deviated from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.