04228490 is referenced by 135 patents and cites 4 patents.

An electroluminescent device includes at least one emissive diode emitting in the red. The emissive face of the diode is covered by a filter element which is substantially transparent in the red, and which has a light transmission coefficient in the blue which is significantly higher than its coefficient in the yellow and the green. The resulting device exhibits superior contrast in sunlight, and is thus particularly suitable for use in vehicle and aircraft dashboard displays.

Title
Display device for use with strong illumination
Application Number
5/935100
Publication Number
4228490
Application Date
August 21, 1978
Publication Date
October 14, 1980
Inventor
Jacques Claude Thillays
Herouville-St-Clair
FR
Agent
Steven R Biren
Jack Oisher
Thomas A Briody
Assignee
U S Philips Corporation
NY, US
IPC
F21V 3/00
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