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Use of car body as a heat spreader for flat automotive lighting systems Disclosure Number: IPCOM000125459D
Publication Date: 2005-Jun-01
Document File: 1 page(s) / 17K

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ID 692751

Publication ID692751

Use of car body as a heat spreader for flat automotive lighting systems

Because nowadays rear-combination lighting systems have a specific build in depth they are mounted via holes in the bodywork of the car. This proposal uses a very flat light-source and reflector combination that can be mounted on the outside of the car. Therefore these holes are redundant. This approach gives some important advantages, e.g. design freedom and heat management opportunities.

Using a very flat system with one or more LEDs and the technique of total internal reflection (TIR), (See drawing below), It is possible to design lighting systems that can be fixed from the outside to the body of a car. Because the holes in the bodywork of the car are unnecessary this invention leads to far more design freedom. Car manufacturers are less restricted in their designs whereas for build-in applications there exist many uncertainties when it comes to maximum dimensions e.g this approach would use less volume of the boot of the car.

Essentially, the heat sink of build in RCL-modules is replaced by the body work of the car, which enables the module to give off its heat to the ambient air much easier. This will reduce the thermal resistance from the junction to the ambient air in a way that is probably impossible when using conventional build-in modules. This invention makes it possible to keep RCL-modules at a lower temperature than is possible for build-in applicat...