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Browse Prior Art Database

Character Display Device

IP.com Disclosure Number: IPCOM000096767D
Original Publication Date: 1963-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Nassimbene, EG: AUTHOR

Abstract

A character drum has disposed about it a plurality of columns of characters. Any one can be selected for display on the associated display screen. Disposed within the character drum and in optical association with each of the plurality of columns of characters is a row of light sources such as three element neons. The neons are strobed at a time such that a selected character in each column of characters is projected upon the display screen for viewing.

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Character Display Device

A character drum has disposed about it a plurality of columns of characters. Any one can be selected for display on the associated display screen. Disposed within the character drum and in optical association with each of the plurality of columns of characters is a row of light sources such as three element neons. The neons are strobed at a time such that a selected character in each column of characters is projected upon the display screen for viewing.

Located on the inside of the drum adjacent each of the characters are a plurality of strips of phosphorescent material. These emit light for approximately one second after being activated. A photocell is located adjacent the rotational path of the strips such that the resistance of the photocell is lowered when a strip passes it which is emitting light.

The photocell resistance is utilized to lower the total resistance in the neon circuit such that it then fires. Thus, the neon fires each revolution. It not only illuminates the selected character for display purposes, but additionally re- illuminates the phosphorescent material.

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