LED lamp configured to minimize image contrast

Details LED lamp configured to minimize image contrast LED lamp configured to minimize image contrast

2005-09-06

2005-09-06

Glick, Edward J. (Department: 2882)

Electric lamp or space discharge component or device manufacturi

Process

Generating gas or vapor within an envelope, or coating by...

C445S014000, C445S024000, C445S058000, C438S025000

Reexamination Certificate

active

06939188

ABSTRACT:
An LED lamps capable of composing a display panel that is installed at any outdoor place and capable of displaying an image thereon with a high contrast under any working conditions at any place. The LED lamp comprises at least one LED chip for emitting visible light, a lead frame comprising a common part and separate parts for supplying electric power to each of electrode terminals of the LED chip and a transparent resin part disposed on the common lead frame for mounting the LED chip and converging light emitted from the LED chip, wherein the LED-chip-mounted surface is provided with an anti-reflection black-colored layer for absorbing light. The LED chip may be a four-element LED chip composed of an active layer of AlGaInP and the light-absorbing layer formed from any of black silver sulfide, silver oxide, iron oxide, chromium oxide, black silver paste and black copper paste.

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