Opitcal projection and image sensing apparatus

Abstract

An optical projection and image sensing apparatus including a light source, a light valve, a first lens set, a sensing module, and a beam splitter is provided. The light valve is used to convert an illumination light from the light source to an image light beam. The first lens set is used to project the image light to display an image on a screen, and the sensing module is used to sense a sensing light from the image on the screen. The beam splitter is disposed on the optical paths of the image light and the sensing light from the image on the screen. One of the sensing module and the light valve is disposed on the optical path of the sensing light passing through the beam splitter, and the other is disposed on optical path of the sensing light reflected by the beam splitter.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of Taiwan application serial no. 95116328, filed May 9, 2006. All disclosure of the Taiwan application is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of Invention[0003]The present invention relates to an image display apparatus. More particularly, the present invention relates to an optical projection and image sensing apparatus.[0004]2. Description of Related Art[0005]FIG. 1A is a schematic perspective view of a conventional optical projection and image sensing apparatus, and FIG. 1 B is a side view of the optical projection and image sensing apparatus of FIG. 1 A. Referring to FIG. 1 A and FIG. 1 B, the conventional optical projection and image sensing apparatus 100 comprises a circuit board 110, an optical projection system 120, an image sensing system 130, and a screen 140. The optical projection system 120 and the image sensing system 130 are coupled to a circ...

AI Technical Summary

Benefits of technology

[0008]Accordingly, an objective of the present invention is to provide an optical projection and image sensing apparatus, so as to reduce the manufacturing cost.

Problems solved by technology

However, in the conventional optical projection and image sensing apparatus 100, since the optical projection system 120 and the image sensing system 130 are separated, the devices (e.g. lens set) in the optical projection system 120 and the image sensing system 130 cannot be shared, it is difficult to save the manufacturing cost.

Thus, the cost of the image sensing system 130 is increased and also the correction of the matching of the four CCD sensing modules 132 is required, thereby increasing the complexity of design and manufacture.

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