Browse Prior Art Database

Over and Under Image Display

IP.com Disclosure Number: IPCOM000081350D
Original Publication Date: 1974-May-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Greeson, JC: AUTHOR

Abstract

In certain applications using a gaseous discharge display device, two to four short messages may be directed to a corresponding number of viewers by constructing the display with two transparent substrates, and using vertically disposed short messages in combination with front surface mirrors.

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Over and Under Image Display

In certain applications using a gaseous discharge display device, two to four short messages may be directed to a corresponding number of viewers by constructing the display with two transparent substrates, and using vertically disposed short messages in combination with front surface mirrors.

In Fig. 1, each of the individual messages 1 through 4 shown as images 1 through 4 are identical, but are shown to four different viewers each disposed 90 degrees from the adjacent viewer. Assuming image number 1 to be the image generated on a conventional gaseous discharge display device, a bezel configuration is used to properly direct the image to the remaining viewers. Front surface mirrors 4 and 6 direct the image from the rear of panel number 8 on which image number 1 is generated to viewers 2 and 3, respectively.

Since image 4 at the rear of the panel is a mirror image of image number 1, the use of mirrors 4 and 6 provides a second image inversion so that the resultant images 2 and 3 are properly in phase.

Viewer number 4 views its image directly, but the image is electronically mirror imaged with respect to image number 1 from the rear of panel number 8.

A mirror image may be desirable depending upon the use made of image number 4, but if a direct view is desired, another mirror can be added to provide a second inversion of the mirror image so that the image number 4 may be directly read by the viewer. As is shown in the drawing, the fro...