Patent ID: 7004586
Filing Date: 2006-02-28
Classification: G03B

Abstract:
1. An image displaying projector for producing and projecting an optical image, comprising: a lamp for emitting a light for image projection; a light tunnel having a tubular portion with an opening provided at each end, which receives the light from the lamp at one end opening of the tubular portion, and guides the light as it reflects on an inner side of the tubular portion, and releases it from the other end opening of the tubular portion; an imaging device for producing an optical image by means of the light released from the light tunnel; and an image projection engine body arranged to support the light tunnel and the imaging device, wherein the tubular portion of the light tunnel is formed by bending a thin metal sheet in order to provide the opening at each end, and has an inner side processed with a reflective mirror coating, and wherein the light tunnel has a mounting portion provided for mounting the light tunnel to the image projection engine body, the mounting portion being configured integral with the thin metal sheet of the tubular portion, and wherein the image projection engine body has positioning projections or recesses provided therein for determining the position of the light tunnel and screw holes provided therein for accepting retainer screws to retain the light tunnel, and wherein the mounting portion of the light tunnel has positioning apertures or projections for engagement with the corresponding positioning projections or recesses of the image projection engine body and screw holes provided therein to align with the screw holes in the image projection engine body for accepting the retainer screws.