Method and apparatus for driving edge-emission type electroluminescent elements, method and apparatus for driving a line head having a plurality of edge-emission type electroluminescent elements and image forming apparatus for forming image data on
US5568178A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1993 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Dec 15, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/45
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for driving edge-emission type electroluminescent elements to emit light to expose an image carrier and to form image data clearly on the image carrier. The edge-emission type electroluminescent elements have electrodes and emit light when a potential difference across the electrodes exceeds a preset threshold value. Electric pulses are supplied to the electrodes of the edge-emission type electroluminescent elements to cause the potential difference across the electrodes to exceed the preset threshold value so that the edge-emission type electroluminescent elements emit light. A series of pulses are supplied for each pixel of image data. The series of pulses includes a first set of pulses supplied at a first cycle to cause the edge-emission type electroluminescent elements to emit light to expose the image carrier, and a second set of pulses supplied at a second cycle slower than the first cycle to cause the edge-emission type electroluminescent elements to emit light to maintain exposure of the image carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.