Browse Prior Art Database

Low Cost Display for Occasional Usage

IP.com Disclosure Number: IPCOM000081741D
Original Publication Date: 1974-Jul-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 3 page(s) / 55K

Publishing Venue

IBM

Related People

Preiss, RJ: AUTHOR

Abstract

The size of a computer display terminal, such as with a gas panel display, can be reduced to a single line, a single word, a single character, or a fractional character by controlling the rate at which information is displayed thereon. The display rate is controlled by the user of the - terminal. The display rate can be set anywhere in a range from a steady, constant frame at a time, to a flashing of words, or of multiple words (e.g., line at a time). The flashing rate is adjusted by the user to his comprehension rate, and the character size (both horizontally and vertically) is also adjustable to the vision width requirements of the user.

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Low Cost Display for Occasional Usage

The size of a computer display terminal, such as with a gas panel display, can be reduced to a single line, a single word, a single character, or a fractional character by controlling the rate at which information is displayed thereon. The display rate is controlled by the user of the - terminal. The display rate can be set anywhere in a range from a steady, constant frame at a time, to a flashing of words, or of multiple words (e.g., line at a time). The flashing rate is adjusted by the user to his comprehension rate, and the character size (both horizontally and vertically) is also adjustable to the vision width requirements of the user.

If only a single character or a fractional character element is displayed at a time, the human post-retinal visual storage is used to perceive a whole word at a time without discomfort. The display control system shown in the figure uses this technique to display a word at a time. Fractional and full-character display controls may be built in a corresponding manner.

The user has available for his adjustment a number of control knobs with which to make his reading of the display as comfortable as he desires. The controls include:
a) Rate at which a word (or line) is flashed by.
b) Width of line (maximum number of characters) displayed in one

continuous stream or flash.
c) Horizontal and vertical magnification of each character being

displayed.
d) Repeat readout of buffer contents.

The flashing times are further automatically adjusted by the number of characters being displayed at a time, permitting the eye and mind more time to comprehend longer words.

The figure illustrates a control system which drives a gas panel display by flashing one word at a time. (The word is delimited by blank characters.) A slight variation will permit the display to flash multiple words at a time. Data enters the buffer 2 from a line or loop adapter 1, depending on the communication method desired to the data source.

A byte length counter 3 keeps track of how many bytes in the buffer 2 have not yet been displayed, at all times, so that when a certain threshold 4 is reached, more data is requested from the data source to maintain display continuity. The threshold value is set dependent on the line speed to the data source. With no further data coming from the source, the buffer contents may be displayed repeatedly by activating the "repeat readout" control

When a display request is initiated, such...