Patent ID: 7572014
Filing Date: 2009-08-11
Classification: G02B,G03B,H04N

Abstract:
1. An image display device comprising: transmitting element that provides image information to illumination light and transmits said light as an optical image signal; projecting optical element that projects said optical image signal; display element that receives said optical image signal through said projecting optical element and displays an image based on said image information, wherein said display element and said projecting optical element shares an optical axis with each other, and said optical axis is disposed at a position diverged from said display element, and wherein said transmitting element is composed of a light emitter for emitting light; a spatial optical modulating element for modulating incident illumination light corresponding to said image information to be outputted, and a converging element that guides the light emitted from said emitter to said spatial optical modulating element to be incident thereon as illumination light, and wherein said projecting optical element is composed of a reflecting part for reflecting said optical image signal, and a refracting optical part for correcting the aberration of said reflecting part and for projecting said optical image signal to said reflecting part, and a plane mirror for reflecting the optical image signal output from said projecting optical element to said display element, wherein said image display device has a relationship that a receiving surface of said display element is parallel to a reflecting surface of said plane mirror, and has a bottom orthogonal to a reflecting surface of said plane mirror and a receiving surface of said display element, and wherein a converging optical system principal part composed of a part of the emitter and converging element is disposed in a placement space in the form of a polyhedron defined as vertexes: a first point present on the base of a quadrangular image displayed on said display element and furthest from the center of the image; a second point on said plane mirror on which light toward the first point is reflected; a third point on said reflecting part on which light toward said second point is reflected; a fourth point, a fifth point, and a sixth point that are respectively formed by projecting said first point, said second point and said third point onto said bottom from the direction normal to said bottom.