Browse Prior Art Database

Valved Illumination Panel

IP.com Disclosure Number: IPCOM000090447D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Johnston, HT: AUTHOR [+3]

Abstract

The illumination panel utilizes a single light source to provide all the legends as well as the indicators for these legends. The latter have previously been obtained with one light source, but it has been necessary to provide a separate lamp for each legend indication. Each lamp requires an appropriate driver circuit to sustain the signal to maintain the indication.

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Valved Illumination Panel

The illumination panel utilizes a single light source to provide all the legends as well as the indicators for these legends. The latter have previously been obtained with one light source, but it has been necessary to provide a separate lamp for each legend indication. Each lamp requires an appropriate driver circuit to sustain the signal to maintain the indication.

Light source 10 is located within transparent plastic roller 12. The periphery of roller 12 has legend strip retaining bosses 14 for holding a number of legend strips 16 around the periphery. Strips 16 are easily removed and replaced with different strips. The strip 16 that is positioned in front of the lens strip 18 is displayed on the translucent panel 20. Light from the same light source 10 passes through the boss 14 that is positioned at the light inlet 20 of light valves
22. There can be any number of valves 22 for each legend on strip 16.

A valve 22 is controlled by a logic signal to light or not light the indicator associated with the proper legend. Valves 22 each contain a permanent magnet 24 and an actuator coil 26 operable with such magnet. A DC pulse of proper polarity causes the actuator 26 to be attracted to the magnet 24. A light valve blade 28 is carried by the actuator 26 so that the light inlet 20 is uncovered allowing the light to pass through to a fiber optic unit 30. This conveys the light to the appropriate indicator position 32 on the display panel 20....