Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Character Checker

IP.com Disclosure Number: IPCOM000090304D
Original Publication Date: 1969-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Cobb, RO: AUTHOR

Abstract

An electro-optic printer or display is described in U. S. Reissue Patent 26,170. This check mechanism is for assuring the proper selection of the character and the proper positioning of the selected character on the printout or display medium for the apparatus of such patent. The electro-optic printer or display system employs three light deflectors 1, 2, and 3. Deflector 1 accepts light beam 4 and selects a desired character from character mask 5. Deflector 2 accepts the selected character and returns the light beam to common axis 6. Deflector 3 positions the character at a desired location on output medium 7.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 81% of the total text.

Page 1 of 2

Character Checker

An electro-optic printer or display is described in U. S. Reissue Patent 26,170. This check mechanism is for assuring the proper selection of the character and the proper positioning of the selected character on the printout or display medium for the apparatus of such patent. The electro-optic printer or display system employs three light deflectors 1, 2, and 3. Deflector 1 accepts light beam 4 and selects a desired character from character mask 5. Deflector 2 accepts the selected character and returns the light beam to common axis 6. Deflector 3 positions the character at a desired location on output medium 7.

Beam splitter 8 is introduced in the light path between mask 5 and deflector
2. Beam splitter 9 is introduced between deflector 3 and output medium 7. Splitter 8 reflects a small portion of the light incident on it to light diode matrix 10. Splitter 9 likewise reflects some light to light diode matrix 11. In matrix 10, a diode is provided for each possible character on mask 5 so that each character selected from such mask is imaged on one diode. The output of the selected diode is electrically sensed and logically compared to the coded signals representing the desired character. Any mismatch or multiple selection or loss of light is noted and an error is indicated.

Matrix 11 similarly consists of a light diode for each possible recording position on medium 7. The output of the energized diode is logically compared with signals representat...