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Illuminated Keybutton Module

IP.com Disclosure Number: IPCOM000079647D
Original Publication Date: 1973-Aug-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

O'Donnell, GM: AUTHOR

Abstract

The figure illustrates an illuminated keybutton, in which the illumination source maintains a position at a constant distance away from the keybutton top. Electric current to illuminate a lamp 7 is brought through terminals 1 to contacts 2 which have hooked portions 3, which bear against contact pads 4 carried on the actuator stem 5. Electrical leads within the body of key actuator stem 5 extend into a socket 6 located in the top portion 13 of the actuator stem. Lamp 7, which may also be a light-emitting diode or other similar illumination source, is inserted in socket 6 for illumination whenever the contact portions 3 bear on the contacts 4 connected by the leads to the socket 6.

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Illuminated Keybutton Module

The figure illustrates an illuminated keybutton, in which the illumination source maintains a position at a constant distance away from the keybutton top. Electric current to illuminate a lamp 7 is brought through terminals 1 to contacts 2 which have hooked portions 3, which bear against contact pads 4 carried on the actuator stem 5. Electrical leads within the body of key actuator stem 5 extend into a socket 6 located in the top portion 13 of the actuator stem. Lamp 7, which may also be a light-emitting diode or other similar illumination source, is inserted in socket 6 for illumination whenever the contact portions 3 bear on the contacts 4 connected by the leads to the socket 6.

The key cap or keybutton 8 can be illuminated to highlight a transparent or translucent area 9 in a generally opaque body, so that the character will be more visually prominent. A tang or friction fixture 10 mounts the keybutton 8 onto the actuator shaft 5 in a fixed relationship. Return spring 11 and housing 12 performs the functions as in a normal key switch, by providing a biasing return force for the keybutton and for housing the components, respectively.

Illumination control of off or on for the illumination source is performed by a source external to the illuminated keybutton. By limiting the size and/or the location of the contact pads 4, one on each side of the key stem 5, the illumination source can be used in any of the following illumination seque...