Apparatus for forming an image with use of electrophotographic process
US5719613A · kind A · utility
8Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1995 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Jun 1, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a apparatus for forming a digital image with use of electrophotographic process wherein the gradation is expressed by changing the laser intensity according to image information, at least one of the surface electric potential V.sub.O of photoconductor and the development bias electric voltage V.sub.B is controlled, and the laser intensity is controlled for gradation correction to compensate a change in gradation due to the control of V.sub.O and V.sub.B. A ratio of variable differences of potential in the apparatus, (V.sub.B -V.sub.I)/(V.sub.O -V.sub.I), is kept constant to control the gamma characteristic in the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.