Browse Prior Art Database

Vibrating Mirror Multiple Line Display

IP.com Disclosure Number: IPCOM000086718D
Original Publication Date: 1976-Oct-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Lowy, JA: AUTHOR [+2]

Abstract

A vibrating mirror is employed to create a multiple-line display from a single line of light-emitting diodes which are strobed in phase with the mirror vibration.

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Vibrating Mirror Multiple Line Display

A vibrating mirror is employed to create a multiple-line display from a single line of light-emitting diodes which are strobed in phase with the mirror vibration.

Mirror 11 mounted on spring steel member 13 is vibrated either by mechanical linkage or magnetically, as shown, by electromagnet 15. A linear array of light-emitting diodes 17, driven by character generator 18, creates a linear display which is reflected by the mirror 11 to the eye of the viewer 19. The LED array is strobed in phase with the mirror vibration so that the observer will see what appears to be a stationary series of images. To generate a display without "flicker", the vibration of the mirror need only be 30Hz or l5Hz if the light-emitting diodes are strobed on both forward and reverse passage of the mirror. For an angle of about 20 degrees of mirror vibration, five lines of 0.2 inch-high characters can be displayed. The small angle of vibration effects a compact display.

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