Illuminated keyboard

• US 7,172,303 B2
• Filed: 11/05/2004
• Issued: 02/06/2007
• Est. Priority Date: 09/15/1999
• Status: Expired due to Term

• Current Assignee: David G. Duckworth, Michael Shipman
• Original Assignee: David G. Duckworth, Michael Shipman
• Inventors: Shipman, Michael, Duckworth, David G.
• Primary Examiner(s): Ward; John Anthony
• Application Number:
  US10/982,327
• Publication Number:
  US 20050083672A1
• Time in Patent Office: 823 Days
• Field of Search: 362/27, 362/29, 362/30, 362/84, 362/26, 362/293, 200/313, 200/314, 341/122, 341/22
• US Class Current: 362/29
• CPC Class Codes: G06F 3/0202 Constructional details or processes of manufacture of the input device
• CPC Class Codes: H01H 13/70 having a plurality of operating members associated with different sets of contacts, e.g. keyboard mounting together a plurality of independent switches H02B
• CPC Class Codes: H01H 2219/018 Electroluminescent panel
• CPC Class Codes: H01H 2219/037 using organic materials, e.g. organic LED
• CPC Class Codes: H01H 2219/062 Light conductor

Abstract

A keyboard is provided having illuminating keys. The keyboard includes a light channeling membrane and key members constructed at least partially of translucent material so that light produced from a light source is channeled upwardly to the upper surfaces of the key members. The light source may include LED or LEC systems in adjoining relationship to the light channeling membrane or light pipe. In a preferred embodiment, the light source is constructed of a substantially planar illuminescent sheet which underlies the light channeling membrane. In an alternative preferred embodiment, a light pipe is constructed to illuminate light laterally along a portion of its length to illuminate a plurality of key members.

Claims

1. A lighted key member for a keyboard, the key member comprising;

a key cap made of a substantially translucent material for channeling light, said key cap including a top, a bottom and one or more sides;

a first substantially reflective and opaque coating covering at least a portion of said key cap;

at least a portion of said top of said key cap being not covered by said first coating so as to provide an illuminated symbol; and

at least of portion of said bottom or sides of said key cap being not covered by said first coating so as to be exposed to a light source and to allow visible light to be received into the translucent material of said key cap and reflected off said substantially reflective coating to be emitted from said top of said key cap.

2. A lighted key member of claim 1 further comprising a second coating covering at least a portion of said first coating, said second coating being less reflective than said first coating.

3. A lighted key member of claim 2 wherein said second coating is substantially non-reflective.

4. A lighted key member of claim 1 wherein said reflective coating is white, light grey, silver, metallic silver or metallic gold.

5. A lighted key member for a keyboard, the key member comprising;

a key cap made of a substantially translucent material for channeling light, said key cap including a top, a bottom and one or more sides;

a first substantially reflective and opaque coating covering at least a portion of said key cap;

a second opaque coating covering at least a portion of said first coating, said second coating being less reflective than said first coating;

at least a portion of said top of said key cap being not covered by said first and second coatings so as to provide an illuminated symbol; and

at least of portion of said bottom or sides of said key cap being not covered by said first and second coatings so as to be exposed to a light source and allow visible light to be received into the translucent material of said key cap and reflected off said substantially reflective coating to be emitted from said top of said key cap.

6. A lighted key member of claim 5 wherein said second coating is substantially non-reflective.

7. An upper housing for a keyboard, the housing comprising:

an upper clamshell member made of a substantially translucent material and including a plurality of holes for receipt of key members;

a substantially reflective and opaque coating covering at least a portion of said clamshell member;

at least of a portion of said clamshell member being not covered by said coating so as to be exposed to a light source and allow visible light to be received into the translucent material of said clamshell member and reflected off said substantially reflective coating to be emitted to key members.

8. An upper housing for a keyboard of claim 7 wherein said reflective coating is white, light grey, silver, metallic silver or metallic gold.

9. An upper housing for a keyboard of claim 7 wherein said substantially reflective and opaque covering covers at least a portion of the upper surface of said claim shell member so as to inhibit light from being transmitted between key members.

10. An upper housing for a keyboard of claim 9 wherein said reflective coating is white, light grey, silver, metallic silver or metallic gold.

11. An upper housing for a keyboard of claim 9 further comprising a second coating covering at least a portion of said first coating with said second coating being less reflective than said first coating.

12. An upper housing for a keyboard of claim 11 wherein said reflective coating is white, light grey, silver, metallic silver or metallic gold.