Image projection system with an invisible-light reflector for heat dissipation

Abstract

An image projection system includes a light source for generating a light beam, a reflective housing, and an invisible-light reflector. The reflective housing includes an opening and forms an accommodating space for accommodating the light source so that the light beam can emit from the opening along an optical path. The invisible-light reflector, whose normal is arranged to form an acute angle with the optical path, is installed at a reflecting position intersecting with the optical path outside the opening of the reflective housing. The invisible light of the light beam will be reflected back to the accommodating space by the invisible-light reflector without any destruction caused by the invisible light.

Description

BACKGROUND OF INVENTION[0001]1. Field of the Invention[0002]The invention relates to an image projection system, and more particularly, to an image projection system that is installed with an_invisible-light reflector according to a predetermined angle and a predetermined position for heat dissipation.[0003]2. Description of the Prior Art[0004]With the promotion of the electro-optic techniques, projecting devices are widely used in various applications. Nowadays, the projecting devices include CRT projectors, LCD projectors, and DMD-based DLP5. In addition, LCOS projectors are expected future stars in the projecting industry. The basic operating principle of various projecting devices is the same: utilizing a high-luminance light source to emit a light beam that then will be passed though some specific optical image modules, such as optical filter, to be projected on a screen with informative content. Generally, the optical power of the high-luminance light source will crucially aff...

AI Technical Summary

Benefits of technology

The invention is an image projection system that has an invisible-light reflector to prevent damage to the system caused by invisible light. The reflector is installed at a specific angle and position to reflect back the invisible light emitted from the system. The system includes a light source, a reflective housing, and an invisible-light reflector. The reflector is installed to intersect with the optical path of the light beam generated by the light source. The technical effect of the invention is to provide a safer and more efficient image projection system.

Problems solved by technology

The above-mentioned prior-art techniques, which make use of a higher optical power of the high-luminance light source to improve the projecting performance of the projecting device, are no longer useful.

First, when designers raise the optical power of the light source from about 100 W to higher than 200 W or 400 W. The heat dissipation becomes a problem difficult to handle in the image projection system 10 as shown in FIG. 1.

In addition, destructive infrared-ray heat combined with ultraviolet rays generated from the extremely-high-luminance light source may seriously damage all components of the image projection system 10 shown in FIG. 1, including the light source 12, the reflective housing 14, and so on.

Images