The present invention includes an invertible and orthoscopic LCD projector having a LCD panel for providing display information that is projected toward a display screen to form a display image. In a preferred embodiment, a converging Fresnel lens is positioned to receive the display information from the LCD panel and form a display object corresponding to the display image. The converging Fresnel lens has an optical center offset from the optical center of the LCD panel in an elevation direction and defines a projection optical axis that extends toward the display screen along an elevation angle in the elevation direction. The Fresnel lens is tilted automatically about a tilt axis transverse to the projection optical axis and the elevation direction by an amount proportional to the elevation angle to cooperate with the offset of the Fresnel lens optical center to form an orthoscopic display image.
A light projector is disclosed that enables a bright display image to be presented with minimum waste of useable light. By arranging at least one light directing means, such as a mirror or a reflecting prism, on an optical path between a light source and a light modulator, and by supporting the light directing means using a support that enables the orientation of the light directing means to be rotatably adjusted, the position of a light spot which illuminates the modulator is made to be adjustable in position, thereby enabling the intensity of the light spot on the modulator to be maximized while minimizing vignetting of the light spot by the modulator.
An image projection apparatus having an adjuster mechanism with a projecting member projecting from a bottom surface of the case to adjust the elevation angle of a projection lens and an opening/closing member located at a front surface of said projection lens for opening or closing the projection opening. The adjuster mechanism uses an electric motor to move the projecting member up and down. The opening/closing member is opened/closed using a linkage mechanism linked to the adjuster mechanism.
A projection lens shifting mechanism comprises a projection lens unit in the shape of a cylinder for projecting incoming image light, a flange integrated with the projection lens unit, a projection lens mount for providing light emitted from a light valve in the shape of a plane to the projection lens unit, wherein the light valve can be optically modulated for each pixel based on image information, and the projection lens mount is concentric to an optical axis of the light emitted from the light valve, a first cam follower provided in the flange along an optical axis of the projection lens unit, a cam follower guiding portion provided in the projection lens mount for guiding the first cam follower in a direction perpendicular to the optical axis of the projection lens unit, a first lens shifting cam capable of being moved in a predetermined direction with respect to the projection lens mount and engaged with the first cam follower, for shifting the first cam follower in a direction guided by the cam follower guiding portion when the first lens shifting cam is moved in the predetermined direction, and a fixing section for integrating and fixing the first lens shifting cam and the flange to the projection lens mount.
An image projection apparatus having an adjuster mechanism with a projecting member projecting from a bottom surface of the case to adjust the elevation angle of a projection lens and an opening/closing member located at a front surface of said projection lens for opening or closing the projection opening. The adjuster mechanism uses an electric motor to move the projecting member up and down. The opening/closing member is opened/closed using a linkage mechanism linked to the adjuster mechanism.
An image projector display device projecting an image onto a surface substantially parallel to a path of light emitted through a representation of an image and a projection/objective lens. The display device compensates for the varying distances of the surface onto to which the image is projected from the projection/objective lens to display a clear, non-distorted image.
