Emitter and method for emitting light
AssigneeWürth Elektronik eiSos GmbH & Co. KG
InventorsZhelio Andreev, Marcel Dörr
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Abstract
An emitter and a method for emitting light are described. The emitter has a substrate with a substrate surface and at least one LED element arranged on the substrate surface for generating the light to be emitted. An active cooling unit for cooling the at least one LED element has at least one cooling channel. The at least one cooling channel is arranged on the substrate surface in a beam path of at least one portion of the light to be emitted, which can be generated by means of the at least one LED element, for redirecting the light to be emitted.
Claims20
An emitter for emitting light, comprising
- a substrate having a substrate surface,
- at least one LED element arranged on the substrate surface for generating the light to be emitted, and
- an active cooling unit for cooling the at least one LED element with at least one cooling channel for a coolant,
- wherein the at least one cooling channel is arranged in a beam path of at least a part of the light to be emitted which can be generated by means of the at least one LED element, for redirecting the light to be emitted,
- wherein the redirection of the light to be emitted takes place without changing a frequency of the light to be emitted,
- wherein the at least one LED element and the at least one cooling channel are embedded in a transparent encapsulation,
- wherein a refractive index nE of the transparent encapsulation is greater than a refractive index nK of the cooling channel, and
- wherein a surface tangent of a region of a cooling channel boundary surface of the at least one cooling channel facing the at least one LED element runs at an angle d to the substrate surface, where the following applies:
- d≤90°−sin−1(nK/nE).
A method of emitting light by means of an emitter comprising the steps of:
- providing an emitter, comprising:
- a substrate with a substrate surface,
- at least one LED element arranged on the substrate surface for generating light to be emitted, and
- an active cooling unit for cooling the at least one LED element, with at least one cooling channel for a coolant,
- wherein the at least one cooling channel is arranged in a beam path of at least a portion of the light to be emitted which can be generated by means of the at least one LED element,
- generating the light to be emitted by means of the at least one LED element,
- cooling of the at least one LED element by means of the active cooling unit and
- redirecting at least a portion of the light to be emitted by means of the at least one cooling channel,
- wherein the redirection of the light to be emitted takes place without changing a frequency of the light to be emitted,
- wherein the at least one LED element and the at least one cooling channel are embedded in a transparent encapsulation,
- wherein a refractive index nE of the transparent encapsulation is greater than a refractive index nK of the cooling channel, and
- wherein a surface tangent of a region of a cooling channel boundary surface of the at least one cooling channel facing the at least one LED element runs at an angle d to the substrate surface, where the following applies:
- d≤90°−sin−1(nK/nE).
Dependencies are inferred from the claim text.