Young Optics Inc.

Cheng-Wei Tien

Hui-Ping Chen

Jui-Ping Chang

Hsin-Tai Wu

A projection device having an image beam and an off-state light is provided, which includes a camera module, a condensing element, a digital micromirror device (DMD) and a shading element, wherein the DMD allows the image beam to enter the camera module, and the shading element is configured between the DMD and the condensing element to block the off-state light.

Projection device and method for decreasing stray light

A projection apparatus includes an illumination system, a light valve, a light beam adjusting element, and a light reflective unit. The illumination system is capable of providing an illumination beam. The light valve, the light beam adjusting element, and the light reflective unit are disposed on a transmission path of the illumination beam. The light valve is disposed between the illumination system and the light reflective unit. The light valve has an active surface for being capable of converting the illumination beam into an image beam. The light beam adjusting element is disposed on the transmission path of the illumination beam and between the illumination system and the light valve. The light beam adjusting element includes at least one lens having a first optical axis. The first optical axis and a normal vector of the active surface are not perpendicular to each other.

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Hsinchu, Taiwan

Cheng-Wei Tien