Browse Prior Art Database

Bidirectional Display

IP.com Disclosure Number: IPCOM000083617D
Original Publication Date: 1975-Jun-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

McVey, BW: AUTHOR [+2]

Abstract

This alphameric display arrangement saves over half of the cost of a display unit and reduces maintenance costs proportionally.

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Bidirectional Display

This alphameric display arrangement saves over half of the cost of a display unit and reduces maintenance costs proportionally.

Point-of-sale or like apparatus 10 comprises a data display composing mechanism 12, one having keys 14, for example, and a changeable exhibitor or display unit 20. The display unit 20 may be a conventional light-emitting diode array, a liquid-crystal display array, and the like. The display unit 20 is arranged facing in one direction in which it is seen by one positioned to the front of the apparatus, but cannot be seen by the operator positioned to the rear of the apparatus 10. A second display unit is conventionally used to permit such viewing in the opposite direction; however, such an arrangement is expensive, of course.

A mirror 30 of a special class of mirrors is arranged on the chassis of the mechanism 12, to reflect an image of the display unit 20 back toward the operator. A casing 40 is arranged over the mechanism 12 with the keys 14 protruding through one aperture, and two other apertures are arranged in the casing 40 for permitting viewing from the front and from the rear. The casing 40 preferably is shaped to exclude as much ambient light as possible while granting easy viewing of the images displayed. Glass 42 or other transparent material is used for protecting the mirror surface.

The mirror 30 may be a conventional orthogonal double-reflection assembly comprising two plane mirror elements arranged nor...