Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Hand held optical scanner for omni-font character recognition










Image Number 3 for United States Patent #4793812.

A high resolution hand held scanner is disclosed for use with a character recognizing and voice synthesizing reading machine for the blind or print handicapped people. The components for scanning swaths of printed text from single sheets or bound pages of bound volumes are housed in an elongated, dust-tight carriage. A broad roller is rotatably mounted on one edge of the carriage and a split roller is rotatably mounted on an opposite edge. The roller axes are coplanar and parallel with each other, so that when the carriage is manually moved across a page to be scanned, a window in the carriage floor is maintained a predetermined distance therefrom and the rollers guide the carriage in a substantially straight line without need of guide rails. A strobed LED array provides the illumination for a 1728 element per inch CCD array via a Selfoc.RTM. lens. Each four CCD elements are summed to synthesize over 400 pixels per inch resolution scanning, with each synthesized pixel having increased light gathering ability. A rotary encoder is belt coupled to the split roller to provide speed and scanning direction signals. Circuitry is provided for processing the CCD array output signals in accordance with the rotary encoder signals.








 
 
  Recently Added Patents
RFID-based intelligent storage cabinet and the management method thereof
Data processing apparatus and data processing method
High voltage fault current limiter having immersed phase coils
Integration and analog to digital conversion circuit with common capacitors and operating method thereof
Heat-resistant alloy member, alloy member for fuel cell, collector member for fuel cell, cell stack, and fuel cell apparatus
Methods of forming semiconductor devices having faceted semiconductor patterns
Satellite aided location tracking with user interface
  Randomly Featured Patents
Stabilized aroma-providing components and foodstuffs containing same
Sulfonamides derived from substituted 2-amino-1,2,4-triazolo (1,5-a) pyrimidines and compositions and methods of controlling undesired vegetation
Measuring device, rock breaking device and method of measuring stress wave
System for sensing an inking member in a value printing device
Protective system for safe disposition of a syringe and hypodermic injection device carried thereon
Disk drive including disk plate including head and/or arm limiter portions for modifying airflow adjacent a disk
Solar power arrays for spacecraft
Fiber optic cable connection
System for selectively and automatically compressing and decompressing data and enabling compressed data to be rendered in a pseudo-native form
Method of repairing a pipeline and apparatus for use in such a method