Browse Prior Art Database

High Resolution Image Buffer System

IP.com Disclosure Number: IPCOM000076299D
Original Publication Date: 1972-Feb-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Johnson, RB: AUTHOR [+2]

Abstract

This system provides buffering for image resolution four times that of broadcast television (TV) displays.

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High Resolution Image Buffer System

This system provides buffering for image resolution four times that of broadcast television (TV) displays.

A cathode-ray tube (CRT) 10 with a fiber optic face plate 12 and having an high-resolution electron-gun deflection system and an ultra-violet (UV) responsive phosphor screen is excited by image signals, either recorded on magnetic tape or generated in a live performance. The complete image comprises four times as many scanning lines as in conventional CRT displays.

A removable fiber optic face plate 20 is placed in front of the fiber optic face plate 12 of the CRT. This removable image buffer fiber optic face plate 20 is made of photochromic material, which will retain the image presented on the CRT. The photochromic image buffer plate can be removed from the position in front of the CRT and used for projecting, viewing or making hard copy of the image.

With this system it will take approximately four times as long to complete an image on the CRT screen. Because of this, the phosphor excited by the first lines scanned may decay before the final lines are scanned. The flicker rate of the system is too slow and UV responsive phosphor screens are not the best for direct viewing of the tube itself. However, the photochromic face plate 20 retains this image.

The photochromic core material preferably is one permitting darkening by ultraviolet light and erasing by infrared light. Viewing light would be somewhere in between these...