Image display device
US10803801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2019 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Mar 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2380/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image display device includes: a light source emitting laser light; a screen on which an image is drawn by being two-dimensionally scanned by the laser light; a scanner causing the laser light to scan the screen; a light detector detecting a light amount of the laser light emitted from the light source; and a controller controlling the light source by changing a current value to drive the light source in response to a target light amount. The controller obtains a detection signal when driving the light source at a plurality of current setting values from the light detector, and corrects the current value with respect to the target light amount according to an arithmetic operation configured to suppress a difference between an output characteristic of the light source guessed by the obtained detection signal and a reference output characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.