Integrated opto-electronic device and portable reflective projection system
First Claim
1. An integrated opto-electronic device used in a portable reflective projection system, comprising:
- a reflective polarizing composite film configured to receive a source light at a desired non-normal incident angle, polarize and reflect a first portion of said source light as polarized illumination light at a reciprocal angle to said desired non-normal incident angle; and
a photovoltaic cell, adhered to an opposite side of said reflective polarizing composite film to said source light, configured to receive a second portion of said source light that passes through said reflective polarizing composite film and transform said second portion to photogenerated charge;
both said reflective polarizing composite film and said photovoltaic cell are fabricated in an adherent stack on a semiconductor substrate, and said photovoltaic cell comprises;
a plurality of reflective top electrical contact lines;
a photon-to-electron converting photo diode; and
a backside electrical contact;
in a plannar configuration, wherein said plurality of reflective top electrical contact lines are regularly spaced in parallel in a plannar configuration with a constant desired spacing between each adjacent pair, placed in electrical contact to the top surface of said photo diode and covered by a plannar dielectric film, and said plurality of reflective top electrical contact lines are embedded into said reflective polarizing composite film.
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Accused Products
Abstract
An integrated opto-electronic device, a portable reflective projection system and a method for in situ monitoring and adjusting light illumination are provided. The device includes a reflective polarizing composite film (150) configured to receive a source light (210) at a desired non-normal incident angle (221), polarizes and reflects a first portion (211) of said source light (210) as polarized illumination light (16) at a reciprocal angle (222) to said desired non-normal incident angle (221); and a photovoltaic cell (180), adhered to an opposite side of said reflective polarizing composite film (150) to said source light (210), configured to receive a second portion (212) of said source light (210) that passes through said reflective polarizing composite film (150) and transform said second portion (212) to photogenerated charge. Unused illumination can be collected in order to re-store and reuse recovered energy.
15 Citations
19 Claims
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1. An integrated opto-electronic device used in a portable reflective projection system, comprising:
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a reflective polarizing composite film configured to receive a source light at a desired non-normal incident angle, polarize and reflect a first portion of said source light as polarized illumination light at a reciprocal angle to said desired non-normal incident angle; and a photovoltaic cell, adhered to an opposite side of said reflective polarizing composite film to said source light, configured to receive a second portion of said source light that passes through said reflective polarizing composite film and transform said second portion to photogenerated charge; both said reflective polarizing composite film and said photovoltaic cell are fabricated in an adherent stack on a semiconductor substrate, and said photovoltaic cell comprises; a plurality of reflective top electrical contact lines; a photon-to-electron converting photo diode; and a backside electrical contact; in a plannar configuration, wherein said plurality of reflective top electrical contact lines are regularly spaced in parallel in a plannar configuration with a constant desired spacing between each adjacent pair, placed in electrical contact to the top surface of said photo diode and covered by a plannar dielectric film, and said plurality of reflective top electrical contact lines are embedded into said reflective polarizing composite film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A portable reflective projection system comprising:
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an electrically powered light source configured to provide source light in a first direction; and integrated opto-electronic device comprising a reflective polarizing composite film configured to receive a source light at a desired non-normal incident angle, polarize and reflect a first portion of said source light as polarized illumination light at a reciprocal angle to said desired non-normal incident angle; and
a photovoltaic cell, adhered to an opposite side of said reflective polarizing composite film to said source light, configured to receive a second portion of said source light that passes through said reflective polarizing composite film and transform said second portion to photogenerated charge;a reflective microdisplay imager comprising a plurality of reflective pixel elements which are arranged in a common plane, wherein said reflective pixel elements are configured to individually modulate reflectivity to incident polarized light and project spatially modulated light in a third direction perpendicular to said common plane; a lens having a principal plane parallel to said common plane and a principal axis aligned in said third direction; an optical surface positioned between said lens and said reflective microdisplay imager and further positioned in a tilted angle with said common plane configured to receive said polarized illumination light, so that portion of said polarized illumination light is deflected by said optical surface as said incident polarized light towards said reflective microdisplay imager, portion of said spatially modulated light passes through said optical surface as projection light partially passes through said lens in said third direction;
a power management device;an energy storage device configured to provide electrical power to one or both of said light source and said reflective microdisplay imager through said power management device; and
a voltage converter and battery charger configure to convert and charge said photogenerated charge transformed by said photovoltaic cell to said energy storage device. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An integrated opto-electronic device used in a portable reflective projection system, comprising:
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a reflective polarizing composite film configured to receive a source light at a desired non-normal incident angle, polarize and reflect a first portion of said source light as polarized illumination light at a reciprocal angle to said desired non-normal incident angle; and a photovoltaic cell, adhered to an opposite side of said reflective polarizing composite film to said source light, configured to receive a second portion of said source light that passes through said reflective polarizing composite film and transform said second portion to photogenerated charge; wherein both said reflective polarizing composite film and said photovoltaic cell are fabricated in an adherent stack on a semiconductor substrate, said photovoltaic cell comprises a top electrical contact grid, a photon-to-electron converting photo diode and a backside electrical contact in a plannar configuration;
said reflective polarizing composite film comprises a single or a plurality of optical micro-structured layers of dielectric material incorporating reflective conductive strips of desired width and thickness, electrically isolated but spaced regularly in parallel straight lines in a plannar configuration. - View Dependent Claims (19)
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Specification