Abstract: The invention discloses a novel projector, comprising a sealed shell of electronic projector, an illumination system and a LED light source system, wherein the sealed shell is provided with an optical and internal circulation cooling assembly inside by area; the optical assembly comprises the projector working assembly. The invention is inside a sealed shell; the cold air far below normal temperature generated by semiconductor refrigeration piece takes away the heat on optical device, improving the heat dissipation efficiency. Simultaneously, because the cold air is inside a sealed shell, the optical device can be placed in a dust-free environment. The polarized light conversion prism converts the useless P light in conventional projector imagining into the useful S light, improving the light utilization, and increasing the brightness of projection at the same power. The LED light source is collimated by the collimating lens to meet PCS conversion requirement for polarized light converter.

Abstract: The invention discloses a novel LCD projector, comprising an imaging system with single-light path system for LCD projector time-division display, a lighting system with PCS (P light converted into S light) function, a three-primary-colors LED light source with microlenses, and a heat dissipation system with dust-proof and self-cleaning function; the monochrome LCD screen of the imaging system has a high light transmittance and resolution, achieving higher brightness and resolution; the lighting part has a polarized light conversion function, which converts the useless P light into useful S light, improving the light utilization and increasing the brightness; a transparent antifouling coating is applied on the optical components of the heat dissipation system to reduce dust adsorption; ultrasonic vibrators are mounted on the optical components to shake off the dust attached; the light source uses the microlens to converge the three-primary-color LED light source to improve light efficiency and uniformity.