06539656 is referenced by 29 patents and cites 2 patents.

A luminaire comprises a relatively thin and flat light-emitting panel (

1

) having a light-emitting window (

2

) and, opposite said light-emitting window, a rear wall (

3

) with opposed edge surfaces (

4, 14

). At least one of the edge surfaces (

4

) is light transmitting and associated with a plurality of light sources (

5, 5′, 5″, . . .

). Light originating from the light sources (

5, 5′, 5″, . . .

) is spread in the panel (

1

). The invention is characterized in that a plurality of deformities (

7, 7′, 7″, . . . ; 8, 8′, . . .

) is provided in the panel (

1

) for extracting light from the panel (

1

) via the light emission window (

2

). The deformities (

7, 7′, 7″, . . . ; 8, 8′, . . .

) are clustered so as to form at least one light symbol (

27; 28

). The configuration of the clusters (

17; 18

) of deformities (

7, 7′, 7″, . . . ; 8, 8′, . . .

) corresponds to the shape of the light symbol (

27; 28

). Preferably, the luminaire has a first and a second light-transmitting edge surface, with respectively, a first and a second plurality of light sources being associated with said surfaces. A first cluster of deformities only couples light from the first light source out of the panel, thereby forming a first light symbol, while a second cluster of deformities only couples light from the second light source out of the panel, thereby forming a second light symbol, independently of the formation of the first light symbol. The luminaire according to the invention provides independent lighting and coloring possibilities of light symbols in a single-panel luminaire.

Title
Luminaire and light-emitting panel
Application Number
9/754636
Publication Number
6539656 (B2)
Application Date
January 4, 2001
Publication Date
April 1, 2003
Inventor
Edwin Van Lier
Eindhoven
US
Constance J E Saalberg Seppen
Arnhem
US
Jelle Hilbrand Schuurmans
Eindhoven
US
Theodorus Mattheus Maria Maas
Eindhoven
US
Agent
Frank Keegan
US
Assignee
Koninklijke Philips Electronics
US
IPC
G09F 13/18
View Original Source