Image recorder using pulse width modulation
US5144338A · kind A · utility
16Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 26, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Apr 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4056
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image recorder for recording an image by reading image data produced by quantizing the image pixel by pixel, subjecting the read image data to image processing, and then manipulating a laser beam modulated by pulse width modulation. A pixel of interest is recorded in a position which is controllable depending on the presence/absence or the densities of pixel data of pixels adjoining the pixel of interest. A laser beam is modulated by pulse width modulation, while the phase or the timing of pulses is controlled to control the recording position, whereby control circuitry is simple and economical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.