Dynamic control of laser power in electrophotographic device to produce accurate positive and negative printed output
US6151058A · kind A · utility
0Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1997 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Mar 18, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/1209
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for controlling the intensity of an imaging laser of an electrophotographic device in order to produce both positive and negative output. This is accomplished by using a software controlled digital circuit to increase or decrease the power supplied to the laser based on the user's desire to print positive or negative output. When the user desires to print positive output, the laser is set to full power. When the user selects negative mode printing, the power to the laser is digitally reduced by a factor unique to the electrophotographic characteristics of the printing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.