Image forming apparatus and light intensity adjusting method
US9709917B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2016 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | May 17, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/04054
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes: an array of m light-emitting elements extending in a main scanning direction, the m being an integer satisfying m≧3; a memory that stores a cumulative light emission time of each of the m light-emitting elements; a light intensity adjusting portion that obtains a light intensity adjusting value for the each light-emitting element; an activating portion that controls the activation and deactivation of the each light-emitting element with the light intensity adjusting value; and a selecting portion that selects n light-emitting elements from an end of the array, the n being an integer satisfying n≧2 and n<m, wherein the activating portion forcibly activates the n light-emitting elements such that the cumulative light emission times of them are adjusted to a predetermined typical value less than the greatest value of cumulative light emission time among the m−n light-emitting elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.