OPTICAL PROJECTION SUBSYSTEM

摘要

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.

主权项

1. 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.