Abstract: A heat dissipation module disposed in a projection device and dissipating heat from a heat source includes a heat dissipation member, a thermoelectric cooler, a heat conduction member, and a sealant. The thermoelectric cooler has a heat absorbing surface, a heat dissipating surface contacting the heat dissipation member, and a first side surface adjacent between the heat absorbing surface and the heat dissipating surface. The heat conduction member has a first contact surface, a second contact surface opposite to the first contact surface, and a second side surface adjacent between the first and the second contact surfaces. The first contact surface contacts the heat source, and at least part of the second contact surface contacts the heat absorbing surface. The sealant is filled between the heat dissipation member and the heat source to cover the first side surface and the second side surface. A projection device is also provided.

Abstract: A color wheel module includes a fixing bracket, a carbon-iron alloy bracket, a motor, an optical filter, a first damper, and a second damper. The carbon-iron alloy bracket is fixed to the fixing bracket. The motor is fixed to the carbon-iron alloy bracket, and the motor is connected with the optical filter, so as to drive the optical filter to rotate between the motor and the fixing bracket. The first damper is disposed between the carbon-iron alloy bracket and the fixing bracket. The second damper is disposed between the motor and the carbon-iron alloy bracket.

Abstract: A color wheel module includes a fixing bracket, a carbon-iron alloy bracket, a motor, an optical filter, a first damper, and a second damper. The carbon-iron alloy bracket is fixed to the fixing bracket. The motor is fixed to the carbon-iron alloy bracket, and the motor is connected with the optical filter, so as to drive the optical filter to rotate between the motor and the fixing bracket. The first damper is disposed between the carbon-iron alloy bracket and the fixing bracket. The second damper is disposed between the motor and the carbon-iron alloy bracket.