LCD projection optical engine adopting LED light source and projection device thereof

Abstract

The invention belongs to a projection light source, a projection optical system and projection display equipment. An optical engine consists of the projection light source, a fly eye lens array, a polarized light converter, a field lens, an alignment lens, a micro lens array, an imaging device LCD screen and a projection lens. A luminous device of the projection light source is a white light power LED array, and a light concentrating element is a collector array. The luminous device, the light concentrating element, the fly eye lens array, the polarized light converter, the micro lens array and an LCD screen lamp with a CF film are reasonably designed and combined to make the projection optical engine acquire high lighting effect and high light output. Because of adopting an LED as a light source lamp, the projection optical engine also has the advantages of long service life, short response time, easy driving, no radiant heat, environmental protection, energy saving, low cost and the like. The optical engine is used as a core component, and is combined with a circuit and a complete machine structure to form a front projection and rear projection device such as a front projector or a rear projection television.

Description

technical field [0001] The invention patent belongs to projection light source, projection optical system and projection display equipment. The patent particularly relates to a single-chip LCD projection optical engine using a power white LED array to form a projection light source, a collector array and a fly-eye lens array to form a projection lighting system, a CF (color filter) film color method, and the use of this optical Engine projection device. Background technique [0002] The front projection device called Data (Data) projector adopts UHP (Ultra High Pressure Mercury Lamp) projection light source, dichroic mirror or color wheel color method, and uses high-resolution, micro-sized micro-display (MD) as an imaging device. A similar optical engine architecture is also used in MD rear projection TVs. The global annual production and sales of MD front projectors and MD rear projection TVs reach more than 7 million units. In addition, there is also a type of front pro...

AI Technical Summary

Problems solved by technology

The area of ​​the LCD used by a video projector may reach dozens of times that of the MD, and the beam expansion of the display device has relatively little constraints on the light source, but its popular projection lighting system with a reflective bowl and a lens makes the engine efficiency so low that it is difficult to exceed 1%

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