| US RE42,617 E1 | ||
| Image projection system with an invisible-light reflector for heat dissipation | ||
| Hung-Jen Wei, Nan-Tou Hsien (Taiwan); Chih-Chang Chou, Taipei Hsien (Taiwan); and Ming-Kuen Lin, Yun-Lin Hsien (Taiwan) | ||
| Assigned to BenQ Corporation, Taipei (Taiwan) | ||
| Filed on May 16, 2008, as Appl. No. 12/122,652. | ||
| Application 12/122652 is a reissue of application No. 10/604722, filed on Aug. 13, 2003, now 7,048,387, filed on May 23, 2006. | ||
| Claims priority of application No. 092102065 (TW), filed on Jan. 29, 2003. | ||
| Int. Cl. G03B 21/14 (2006.01); G03B 21/28 (2006.01); G02B 1/00 (2006.01); G02B 5/28 (2006.01); F21V 9/00 (2006.01); G02F 1/00 (2006.01); H04N 5/74 (2006.01) | ||
| U.S. Cl. 353—99 [353/37; 359/584; 359/589; 362/293; 348/771] | 20 Claims |
| [ 10. A light source module comprising:
a light source for generating a light beam;
a reflective housing comprising an opening, the opening having a diameter smaller than a maximum diameter of the reflective
housing, the reflective housing forming an accommodating space, the light source installed inside the accommodating space
so that the light beam generated by the light source substantially propagates along an optical path through the opening away
from the accommodating space, wherein the reflective housing is substantially parabolic shaped, and the optical path is a
substantially parallel route by which the light beam propagates after being reflected by the parabolic reflective housing;
and
an invisible-light reflector installed at a reflecting position intersecting with the optical path outside the opening of
the reflective housing, a normal of the invisible-light reflector and the optical path intersecting to form a predetermined
angle so that invisible light of the light beam emitted from the opening will be reflected back into the accommodating space;
wherein the predetermined angle formed by the normal of the invisible-light reflector and the optical path is an acute angle
not equal to zero degrees, so that infrared rays of the light beam reflected back into the accommodating space by the invisible-light
reflector will not focus on the reflective housing.]
|