Multi-wavelength LED curing lamp
AssigneePhoseon Technology, Inc.
InventorsGarth Eliason, Doug Childers
Life of this patent
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Abstract
A curing device may comprise a first array of LED's, each LED of the first array emitting radiation substantially centered at a first excitation wavelength onto a quantum dot layer, the quantum dot layer positioned above the first array of LED's and configured to partially absorb the first excitation wavelength radiation and down convert the absorbed first excitation wavelength radiation, and partially transmit the emitted first excitation wavelength radiation, wherein the down converted and the partially transmitted first excitation wavelength radiation are directed onto a radiation-curable workpiece.
Claims13
A curing device, comprising:
- a first array of LEDs with a micro-lens array, each LED of the first array emitting radiation that is focused by the micro-lens array and substantially centered at a first excitation wavelength onto a quantum dot layer, the quantum dot layer positioned above the first array of LEDs and configured to
- partially absorb the first excitation wavelength radiation and down convert the absorbed first excitation wavelength radiation, and
- partially transmit the emitted first excitation wavelength radiation,
- wherein the down converted and the partially transmitted first excitation wavelength radiation are directed onto a radiation-curable workpiece, and
- wherein each micro-lens is positioned directly over and in face-sharing contact with a corresponding LED in the first array of LEDs, wherein the quantum dot layer is positioned directly over and in face-sharing contact with the array of micro-lenses.
A method of curing a workpiece, comprising:
- emitting radiation substantially focused and substantially centered at a first excitation wavelength from an array of LEDs onto a quantum dot layer;
- only partially transmitting the first excitation wavelength radiation through the quantum dot layer onto a radiation-curable workpiece;
- only partially absorbing the emitted first excitation wavelength radiation at the quantum dot layer;
- responsive to absorbing the first excitation wavelength radiation, down converting the absorbed first excitation wavelength radiation at the quantum dot layer and emitting the down converted radiation onto the radiation-curable workpiece;
- and
- collimating the first excitation wavelength radiation at an array of micro-lenses in face-sharing contact with the array of LEDs, prior to only partially absorbing and down converting the first excitation wavelength radiation at the quantum dot layer.
Dependencies are inferred from the claim text.