Illumination apparatus confining light by total internal reflection and methods of forming the same
First Claim
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1. An illumination device comprising:
- a waveguide;
a sub-assembly attached to a first surface of the waveguide only at a plurality of discrete attachment points, an air gap separating the first surface of the waveguide and the sub-assembly between the plurality of discrete attachment points; and
a bare-die light-emitting diode (LED) mechanically coupled to the sub-assembly and disposed within the waveguide, light emitted by the bare-die LED being in-coupled into the waveguide.
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Abstract
In various embodiments, an illumination apparatus includes an air gap between a sub-assembly and a waveguide attached thereto at a plurality of discrete attachment points, as well as a bare-die light-emitting diode encapsulated by the waveguide.
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Citations
40 Claims
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1. An illumination device comprising:
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a waveguide; a sub-assembly attached to a first surface of the waveguide only at a plurality of discrete attachment points, an air gap separating the first surface of the waveguide and the sub-assembly between the plurality of discrete attachment points; and a bare-die light-emitting diode (LED) mechanically coupled to the sub-assembly and disposed within the waveguide, light emitted by the bare-die LED being in-coupled into the waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of forming an illumination device incorporating a bare-die light-emitting diode (LED) mechanically coupled to a sub-assembly, the method comprising:
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attaching the sub-assembly to a first surface of a waveguide at only a plurality of discrete attachment points, thereby defining an air gap disposed between the first surface of the waveguide and the sub-assembly between the plurality of discrete attachment points; and encapsulating the bare-die LED within a recess defined by the waveguide in the first surface, thereby facilitating in-coupling of light emitted by the bare-die LED into the waveguide. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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- 33. A method of forming an illumination device incorporating a bare-die light-emitting diode (LED), the method comprising encapsulating the bare-die LED within a waveguide by disposing the bare-die LED within a waveguide material such that the waveguide material directly contacts, without a gap therebetween, the bare-die LED or an index-matching material disposed around and in direct contact with the bare-die LED.
Specification