Optical manifold for light-emitting diodes
Patent
·
OSTI ID:1176183
An optical manifold for efficiently combining a plurality of blue LED outputs to illuminate a phosphor for a single, substantially homogeneous output, in a small, cost-effective package. Embodiments are disclosed that use a single or multiple LEDs and a remote phosphor, and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. A further aperture mask is used to boost phosphor luminance with only modest loss of luminosity. Alternative non-recycling embodiments provide blue and yellow light in collimated beams, either separately or combined into white.
- Research Organization:
- Light Prescriptions Innovators, LLC, Altadena, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-05NT42341
- Assignee:
- Light Prescriptions Innovators, LLC (Altadena, CA)
- Patent Number(s):
- 7,380,962
- Application Number:
- 11/329,294
- OSTI ID:
- 1176183
- Country of Publication:
- United States
- Language:
- English
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