Patent ID: 11914164
Assignee: CORETRONIC CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A projection device, comprising:
an optical engine module, configured to provide an image beam, wherein the optical engine module comprises:
a light source unit, configured to emit a light beam;
a first diffusion element, disposed on a transmission path of the light beam;
a polarizing beam splitting element, disposed on the transmission path of the light beam, wherein the first diffusion element is disposed between the polarizing beam splitting element and the light source unit;
a second diffusion element, having at least one optical surface, wherein the at least one optical surface is configured to diffuse the light beam, the second diffusion element is configured to guide the light beam to form an illumination beam, and the illumination beam has an optical image matching angle; and
a light valve, disposed on the transmission path of the illumination beam, wherein the light valve is configured to convert the illumination beam to an image beam; and

a projection lens, disposed on a transmission path of the image beam to project the image beam out of the projection device, wherein the projection lens has a pupil, the optical image matching angle of the illumination beam substantially matches a viewing angle of the pupil.