Projector and method of controlling projector
US9971233B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2016 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Mar 9, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/2053
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projector according to an aspect of the invention includes a discharge lamp having a light emitting tube and configured to emit light, a light modulation device configured to modulate the light emitted from the discharge lamp in accordance with an image signal, a projection optical system configured to project the light modulated by the light modulation device, a first detection section configured to detect ultraviolet light out of the light emitted from the discharge lamp, and a control section configured to determine a deterioration state of the light emitting tube based on a light intensity of the ultraviolet light detected by the first detection section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.