Illumination device with LED strip light engine configured for retrofitting pin-based CFL socket
AssigneeLedvance GmbH
InventorsRan Lin, Bernhard Rieder, Shaozhu Yang
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Abstract
An LED illumination device corresponds to a compact fluorescent lamp and has improved thermal properties. The illumination device includes a transparent tube having an inner wall defining a cavity, a light engine having one or more light emitting diodes, and a driver to drive the light engine. The light engine is disposed at the inner wall of the transparent tube. The arrangement of the light engine and the one or more light emitting diodes at the inner wall of the tube provides improved lighting characteristics. Simultaneously, an improved cooling is provided by the interface surface for conducting heat between the inner wall and the light engine.
Claims23
An illumination device comprising:
- a light-transmissive tube having an inner wall defining a cavity;
- a light engine comprising:
- at least one physically flexible circuit board formed as a strip and extending substantially linearly in a longitudinal axial direction of the light-transmissive tube;
- and
- one or more light emitting diodes populated on the at least one physically flexible circuit board;
- and
- a driver configured to drive the light engine;
- wherein the at least one physically flexible circuit board of the light engine is fixed directly on the inner wall of the light-transmissive tube by a first adhesive;
- and
- wherein the illumination device is configured to be received within a socket to provide electrical energy to the driver.
Dependencies are inferred from the claim text.