Projector
US8988006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2012 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Nov 13, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/2026
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projector includes: a discharge lamp; a discharge lamp driving unit that drives the discharge lamp by supplying a driving power to the discharge lamp through supply of a driving current thereto; and a control unit that controls the discharge lamp driving unit based on plural operating modes in which maximum values of the driving power are different from one another, wherein the control unit switches the operating mode through a transition period and controls the discharge lamp driving unit so that an average value of a frequency of the driving current in the former half of the transition period becomes larger than an average value of a frequency of the driving current in the latter half of the transition period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.