Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Illuminated Stem and Changeable Keycap Assembly

IP.com Disclosure Number: IPCOM000043588D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Miles, AW: AUTHOR [+2]

Abstract

A lighted keybutton system for keyboards is described in which the individual keystems are illuminated by a specially molded light-emitting diode (LED) which snaps onto the stem. The keycap snaps onto the stem and may contain different colors, nomenclatures; or the like. This simplifies customer-changeable keybutton applications and facilitates illuminated keybuttons on capacitive style or elastic diaphragm style switches. Connection to the individual LEDs is made by soldering a flexible circuit or stranded small wire (not shown) to the leads of the LEDs. The wire will flex and follow the key stem in operation. The figure illustrates an exploded view of the keystem 1 with a specially molded recess 2 that matches the specially molded housing 3 of the LED.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Illuminated Stem and Changeable Keycap Assembly

A lighted keybutton system for keyboards is described in which the individual keystems are illuminated by a specially molded light-emitting diode (LED) which snaps onto the stem. The keycap snaps onto the stem and may contain different colors, nomenclatures; or the like. This simplifies customer-changeable keybutton applications and facilitates illuminated keybuttons on capacitive style or elastic diaphragm style switches. Connection to the individual LEDs is made by soldering a flexible circuit or stranded small wire (not shown) to the leads of the LEDs. The wire will flex and follow the key stem in operation. The figure illustrates an exploded view of the keystem 1 with a specially molded recess 2 that matches the specially molded housing 3 of the LED. Leads 4 may be connected to flexible circuit elements to supply power to the LED 3. A keycap 5 is optional but may interchange with any of the keystems 1 in a given application. An aperture or window 6, allowing the illumination from the LED 3 to exit from an opaque keycap 5, may also be provided. Obviously, the keycap may be clear or of colored or transparent material and the LED 3 can be molded of colored or transparent material, for various combinations and high interchangeability.

1

Page 2 of 2

2

[This page contains 1 picture or other non-text object]