Device and method for automatic color calibration in a laser scanning apparatus
US9942531B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2017 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Mar 14, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3185
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color calibration device for a laser scanning apparatus includes a compensation unit configured to electronically compensate for positional errors of the three-color laser source. The compensation unit includes an emitted light detector configured to measure a power of an emitted light beam. A calibration unit coupled to the emitted light detector has a controller configured to generate a quantity correction value for the three-color laser source. A laser source control element is configured to generate a control quantity for the three-color laser source, based on the quantity correction value. A dominant color detector is configured to detect any dominant color in the light beam being projected and actuate the controller for the dominant color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.