Browse Prior Art Database

Luminescent Display Device

IP.com Disclosure Number: IPCOM000096779D
Original Publication Date: 1963-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Sanford, RS: AUTHOR

Abstract

In punched card operated machines, it is often desirable to have some indication of which column of a card is being operated upon. This is especially true where data is to be removed from storage for entry in the card.

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 100% of the total text.

Page 1 of 2

Luminescent Display Device

In punched card operated machines, it is often desirable to have some indication of which column of a card is being operated upon. This is especially true where data is to be removed from storage for entry in the card.

This display is electroluminescent and is operated by a binary counter circuit. Frame 10 holds both record card 11 and electroluminescent plate 12. Plate 12 comprises a sheet of glass or other transparent ceramic 14. On this is chemically deposited clear phosphor material such as zinc sulphide or cadmium sulphide doped with copper or zinc. Areas 15 of copper are formed on one side of sheet 14 by vapor deposition. Strips 16 of titanium oxide are placed on the opposite side of sheet 14. AC current applied to plate 15 and strip 16 causes the phosphor material on sheet 14 to glow in the area where the plate and strip cross.

A binary counter operating through a matrix of seven relays selects any one of the columns in an 80 column card. A glow in strip 16 not only indicates the column by illuminating the exposed portion below the 11, but also illuminates certain control data pertaining to that column.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]