Browse Prior Art Database

Display Matrix Addressing System

IP.com Disclosure Number: IPCOM000090854D
Original Publication Date: 1969-Jul-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Haberland, PH: AUTHOR [+2]

Abstract

In a gas panel display device, characters are generated on the face of the panel display as a sequence of dots by applying AC signals to selected orthogonal conductors, each conductor having an associated driver. In such devices, maximum efficiency of drivers is obtained by using a square matrix. However, practical considerations usually preclude the use of square matrices since a limited number of rows with a large character capacity per row may be required. In one example, a 320-character gas panel display utilizes a configuration of eight rows of 40 characters per row. Assuming that each character is generated from a 7x7 matrix, this requires 280 vertical drivers and 56 horizontal drivers for a total driving requirement of 336 drivers.

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Display Matrix Addressing System

In a gas panel display device, characters are generated on the face of the panel display as a sequence of dots by applying AC signals to selected orthogonal conductors, each conductor having an associated driver. In such devices, maximum efficiency of drivers is obtained by using a square matrix. However, practical considerations usually preclude the use of square matrices since a limited number of rows with a large character capacity per row may be required. In one example, a 320-character gas panel display utilizes a configuration of eight rows of 40 characters per row. Assuming that each character is generated from a 7x7 matrix, this requires 280 vertical drivers and 56 horizontal drivers for a total driving requirement of 336 drivers. In this display device, the number of drivers is reduced significantly by dividing the panel into two logical displays. Each such display consists of eight rows of 20 characters on the left and eight rows of 20 characters on the right.

Left column drivers 1...20 are connected via associated cables to the left and right column lines 1'...20' and 1"...20" such that actuation of drivers 1...20 energizes the associated pair of drive conductors. Characters on the left portion of the display are selected by row drivers 21...28. Characters on the right are selected by row drivers 29...36. Thus, the column drivers, which comprise the majority of the drivers in the system, are reduced by half to 140. The...