Patent ID: 8240856

Claim:
A compact projector comprising: a main control board comprising a first side, a second side, a third side parallel to the first side, and a fourth side parallel to the second side, the four sides connected to each other end-to-end; an optical engine positioned on the main control board, the optical engine comprising a light-shading member and a projection lens module facing toward the first side, the light-shading member comprising a first plate and a second plate, a lengthwise direction of the first plate being along a direction from the first side to the third side, a lengthwise direction of the second plate being along a direction from the second side to the fourth side, the first plate and the projection lens module being approximately perpendicular to the second plate to form a U-shape; an L-shaped heat dissipation assembly positioned adjacent to the first plate and along the first side and the fourth side; a light source control board positioned on a rear portion of the main control board between the second plate and the third side, a lengthwise direction of the light source control board being along a direction from the second side to the fourth side; and a digital-micromirror-device control board positioned on the main control board between the projection lens module and the second side, and being perpendicular to the light source control board.