3 results about "Magnified projection" patented technology

The utility model relates to display technical field, concretely is a kind of energy-saving intelligent hundred-inch large screen display device, the utility model is enlarged by the magnification principle of concave mirror, and light source is enlarged projection by optical design, avoid the overhigh energy consumption needed by entity screen, and the high level energy consumption caused by the high brightness of environmental influence and use requirement, can reduce the high energy consumption of traditional utilization television or projector to realize large screen to about one tenth, projection image still can keep clear and stable, and through three circuit boards respectively control screen, loudspeaker, key and peripheral equipment, and CPU operation android can freely match different application compatibility, provide greater technical guarantee for the energy saving, economy of display field.

The present invention realizes a projector that can prevent the degradation of optical performance caused by changes in the shape of the reflective surface due to localized high temperatures of the projector's reflector. It includes an image display unit and an imaging optical system that magnifies and projects the image displayed by the image forming section of the image display unit onto a projection surface. The imaging optical system includes: a lens system (LS) to which image light from the image forming section is incident; a synthetic resin reflector (M) disposed on the magnifying side of its aperture stop (S) and having refractive power; and an image correction control unit (4) that corrects for degradation of the magnified image caused by uneven temperature rise of the reflector (M) due to the intensity distribution of the imaging beam.

The invention provides a projector capable of preventing deterioration of optical performance caused by a change in the shape of a reflecting surface due to local high temperature of a reflector of the projector. An imaging optical system having an image display element and an image displayed by an image forming unit of the image display element, the imaging optical system having: a lens system (LS) on which image light from the image forming unit is incident; and a synthetic resin mirror (M) that is disposed on the enlargement side of the aperture stop (S) and has refractive power, and the projector has: a thermistor (21) that detects the temperature of a predetermined position on the reflection surface of the mirror on the back side of the reflection surface; a cooling unit that includes a Peltier element (22) and heat transfer members (11-13) and cools an area region including a predetermined position; and a control means (30) for constantly controlling the cooling of the area region by the cooling means on the basis of the temperature detection by the thermistor.