Image recording apparatus for correcting nonuniformities in the exposure light amount
US6222578A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Mar 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4015
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an image recording apparatus, exposure light amounts measured by a sensor immediately after a PLZT head performs an exposure with exposure light amounts corrected first by a controller using an original scanner or the like are stored in a memory as correction reference exposure light amounts. Thereafter, the controller performs an exposure correction such that the exposure light amounts measured by the sensor agree with the correction reference exposure light amounts. At this time, since the correction reference exposure light amounts are set according to the precision of the sensor, a shortage of the exposure light amount can be easily recognized by comparing both exposure light amounts even if the precision of the sensor is not high. As a result, the exposure correction can be reliably performed. Accordingly, the exposure light amounts can be accurately corrected even when using a sensor having a relatively large scanning displacement. As a result, the price of the image recording apparatus can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.