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US 2014/0211173 A1Published application
Optical projection subsystem
Assignee3M Innovative Properties Company
InventorsPatrick R. Destain, Jennifer L. Grace, John E. Duncan, Tomasz A. Pol, William E. Phillips, III, Michael W. O'Keefe, Alexander A. Glinski, Stephen J. Willett
Life of this patent
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Abstract
A projection subsystem includes a light engine that provides a collection lens, a collimator and at least one solid state light emitter. A projection lens assembly receives the image and provides a projection beam having a luminous flux level. The projection subsystem has a portability efficacy.
Claims4
A portable device comprising:
- A projection subsystem, comprising:
- a light engine that provides a light beam, the light engine including a collection lens, a collimator and at least one solid state light emitter that receives an electrical power level and that is coupled to a heat sink and that provides a light beam with an emitter luminous flux level;
- an image-forming device that receives image data and that receives at least a component of the light beam, the image-forming device providing an image;
- a projection lens assembly that receives the image and that provides an image projection beam having a projected luminous flux level;
- and
- the projection subsystem has a portability efficacy that comprises a ratio of luminous flux to electrical power level of at least 3.8 lumens for 1 watt, and a projection subsystem volume of less than 14 cubic centimeters or a projection subsystem thickness of less than 14 millimeters;
- wherein the heat sink comprises a plate surface that is exposed at an outer package surface of the portable device.
4 more elements
A pocket portable device comprising:
- A projection subsystem, comprising:
- a light engine that provides a light beam, the light engine including a collection lens, a collimator and at least one solid state incoherent light emitter that receives an electrical power level and that is coupled to a heat sink and that provides a light beam with an emitter luminous flux level;
- an image-forming device that receives image data and that receives at least a component of the light beam, the image-forming device providing an image;
- a projection lens assembly that receives the image and that provides an image projection beam having a projected luminous flux level;
- an anamorphic optical surface that adjusts an aspect ratio of the image projection beam;
- and
- the projection subsystem has a portability efficacy that comprises a ratio of luminous flux to electrical power level of at least 3.8 lumens per watt, wherein the heat sink comprises a plate surface that is exposed at an outer package surface of the portable device.
4 more elements
Dependencies are inferred from the claim text.