Apparatus for generating an image from a digital video signal
Patent 4800442 Issued on January 24, 1989. Estimated Expiration Date: 
May 18, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 18, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3197558 3230303 3393269 3461229 3643016 3882270 3916096 Video-to-binary conversion apparatus having moire suppression characteristics Electronic screening Facsimile method and apparatus for setting white level Inventors
AssigneeApplicationNo. 07/051154 filed on 05/18/1987US Classes:358/3.12, Size of print element347/252By adjusting pulse width of light beamExaminersPrimary: Britton, Howard W.Attorney, Agent or FirmInternational ClassH04N 1/405 (20060101)AbstractAn apparatus for generating a high quality image from a digital video signal includes a system for gamma correcting the digital video signal with a digital look up table and for converting the resultant digital signal to an analog video signal. Another circuit generates a triangular wave reference pattern signal and a comparator compares the analog video signal with the triangular wave reference pattern signal to form a pulse-width-modulated signal. A raster scanning print engine producing, for example, a laser beam, scans over a recording medium in accordance with the pulse-width-modulated signal, thereby forming an image of high quality on the recording medium of a print engine. This apparatus can also be used with an analog video signal by first converting the analog video signal to a digital video signal with an analog to digital converter.Other References
| |
