Display device for use with strong illumination
AssigneeU.S. Philips Corporation
InventorJacques-Claude Thillays
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Abstract
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.
Claims8
An electroluminescent device comprising at least one emissive diode emitting in the red, a filter element which is substantially transparent in the red and which covers the emissive face of said diode, the light transmission coefficient of said filter element in the blue being significantly higher than the light transmission coefficient of said filter element in the yellow and in the green.
An electroluminescent device as claimed in any of the preceding claims, wherein said filter element is manufactured from a thermosetting plastic material which in itself is transparent and which comprises a comparatively very small dose of a dye of the shade blue-violet.
Dependencies are inferred from the claim text.