US 12,332,555 B2
Optical engine module for dissipating heat generated by off-state beam and projection device using the same
Mao-Min Fu, Hsin-Chu (TW); and Chien-Ming Peng, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Apr. 19, 2021, as Appl. No. 17/233,564.
Claims priority of application No. 110108804 (TW), filed on Mar. 12, 2021.
Prior Publication US 2022/0291575 A1, Sep. 15, 2022
Int. Cl. G03B 21/16 (2006.01); G03B 21/14 (2006.01); G03B 21/28 (2006.01)
CPC G03B 21/16 (2013.01) [G03B 21/145 (2013.01); G03B 21/28 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An optical engine module used for a projection device and configured to generate an image beam, the optical engine module comprising:
a housing, having a surrounding side wall and a bottom wall connected to each other, wherein the bottom wall has a first opening configured to allow the image beam to exit, and the surrounding side wall has a second opening;
an optical prism, having a triangular column shape, wherein the optical prism comprises:
a first surface facing to the first opening and a second surface facing to the second opening, wherein the first surface and the second surface are connected and perpendicular to each other, and
a third surface connected and located between the first surface and the second surface, and being an inclined surface of the triangular column;
a plate, having a light receiving part and a heat dissipating part, wherein the light receiving part is located between a surface of the optical prism and the surrounding side wall, the surface of the optical prism is connected to the first surface, the second surface and the third surface, the light receiving part is configured to be irradiated by an off-state beam, and the heat dissipating part passes through the bottom wall from an inside of the housing, and extends out of the housing in a direction away from the bottom wall;
wherein the off-state beam is configured to leave from the third surface of the optical prism and at least a part of the off-state beam is configured to directly irradiate to the light receiving part;
wherein in a normal direction of the bottom wall, an orthogonal projection of the light receiving part on the bottom wall is not overlapped with the first opening of the bottom wall.