Indicator lamps
First Claim
1. In an indicator lamp having a LED light source embedded within a transparent plastics encapsulation, the improvement wherein substantially all of the surfaces of said transparent plastics encapsulation surrounding the LED are coated black except for a portion of said surfaces through which emitted light from the LED passes outwardly to the viewer.
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Accused Products
Abstract
The invention relates to indicator lamps and in particular to such lamps which are required to be clearly visible in high ambient light conditions.
In order to overcome the problem of light emitted by the lamp competing with the ambient light reflected from the lamp the invention provides an indicator lamp having a light source contained within a light source support in which substantially all of the surfaces of the light source support surrounding the light source are coated black, except for a portion of the surfaces through which emitted light from the light source passes outwardly to the viewer.
In a preferred embodiment the light source is an L.E.D.
43 Citations
5 Claims
- 1. In an indicator lamp having a LED light source embedded within a transparent plastics encapsulation, the improvement wherein substantially all of the surfaces of said transparent plastics encapsulation surrounding the LED are coated black except for a portion of said surfaces through which emitted light from the LED passes outwardly to the viewer.
- 4. An indicator lamp comprising a LED contained within a cylindrical transparent plastics encapsulation, said encapsulation having flat front and rear circular faces, a cylindrical lens, said lens having flat front and rear faces, a hollow cylindrical housing containing said encapsulated LED and lens and mounting said front surface of the encapsulation engagement with at least a portion of the rear surface of said lens, and an annular shroud which engages the housing and is adapted to hold the lens in position relative to the encapsulated LED, all of the external surfaces of the encapsulation and the lens being coated black except for the surface portions of the encapsulation and LED which contact each other and for the area of the front surface of the lens through which the emitted light from the LED is viewed.
Specification