Abstract: A projector includes an apparatus casing, a light source module, a flow generating device, a sensing module, and a power module. The light source module is disposed inside the apparatus casing and includes a light-emitting part and a lampshade surrounding the light-emitting part. The flow generating device can generate an air flow for dissipating heat by the light source module. The sensing module is disposed in the apparatus casing and includes a thermo-sensitive component disposed near the lampshade and located in a flowing path of the air flow. The power module is disposed in the apparatus casing and electrically connected to the light source module and the sensing module. The power module selectively stops powering the light source module according to an electric parameter of the thermo-sensitive component. Thereby, the invention protects the projector from being overheated by use of the thermo-sensitivity of the thermo-sensitive component.

Abstract: A projector includes an apparatus casing, a light source module, a flow generating device, a sensing module, and a power module. The light source module is disposed inside the apparatus casing and includes a light-emitting part and a lampshade surrounding the light-emitting part. The flow generating device can generate an air flow for dissipating heat by the light source module. The sensing module is disposed in the apparatus casing and includes a thermo-sensitive component disposed near the lampshade and located in a flowing path of the air flow. The power module is disposed in the apparatus casing and electrically connected to the light source module and the sensing module. The power module selectively stops powering the light source module according to an electric parameter of the thermo-sensitive component. Thereby, the invention protects the projector from being overheated by use of the thermo-sensitivity of the thermo-sensitive component.

Abstract: An optical sensing apparatus with anti-dust structure, for sensing a rotation device which has a rotation surface rotating along a rotation direction, includes a base, an optical sensor, and a stop block. The stop block is located beside the optical sensor and disposed with the optical sensor on the base in accordance with the order of the rotation direction. A distance between a stagnation surface of the stop block and the rotation surface is shorter than a distance between a sensing surface of the optical apparatus and the rotation surface. When an air flow passes between the stagnation surface and the rotation surface, dust within the air flow could be partially deposited on the stagnation surface so as to reduce the deposition amount of the dust on the sensing surface. A filter apparatus with the optical sensing apparatus and a projector with the filter apparatus are also disclosed.

Abstract: An optical sensing apparatus with anti-dust structure, for sensing a rotation device which has a rotation surface rotating along a rotation direction, includes a base, an optical sensor, and a stop block. The stop block is located beside the optical sensor and disposed with the optical sensor on the base in accordance with the order of the rotation direction. A distance between a stagnation surface of the stop block and the rotation surface is shorter than a distance between a sensing surface of the optical apparatus and the rotation surface. When an air flow passes between the stagnation surface and the rotation surface, dust within the air flow could be partially deposited on the stagnation surface so as to reduce the deposition amount of the dust on the sensing surface. A filter apparatus with the optical sensing apparatus and a projector with the filter apparatus are also disclosed.

Abstract: A heat dissipation method for a projector includes measuring a first temperature at an intake vent of a projector, measuring a second temperature at an outlet vent of the projector, controlling a heat sink of the projector based on the first temperature when the second temperature is smaller than a predetermined value, and controlling the heat sink of the projector based on the second temperature when the second temperature is larger than the predetermined value.

Abstract: An electronic device includes a housing, a lamp having a voltage rating, a ballast electrically connected to the lamp, a main board having a predetermined voltage and electrically connected to the ballast, a first fan electrically connected to the main board, and a second fan electrically connected to the main board. The lamp, the ballast, the main board, the first fan and the second fan are disposed in the housing, and the first fan is nearer the ballast than the second fan. When the voltage rating of the lamp is greater than the predetermined voltage of the main board, the main board actuates the first and second fans to dissipate heat from the lamp and other elements in the housing. When the voltage rating of the lamp is less than the predetermined voltage of the main board, the ballast actuates only the first fan to dissipate heat from the lamp.

Abstract: An electronic device. The electronic device includes a housing, a light source and at least one heat-dissipating member. The light source is disposed in the housing, emitting light. The heat-dissipating member is disposed in the housing for lowing operating temperature of the electronic device and preventing light from escaping the housing.

Abstract: A temperature control method for a display device comprising a lamp box for emitting a light, a fan for cooling down the display device and a digital image device for receiving the light from the lamp box and forming an image, comprises acquiring an operating time of the lamp box; calculating a temperature offset in accordance with the operating time of the lamp box; acquiring a temperature value of the digital image device; calculating a control value in accordance to the temperature value and the temperature offset; controlling the fan in accordance with the control value.

Abstract: A heat dissipation method for a projector includes measuring a first temperature at an intake vent of a projector, measuring a second temperature at an outlet vent of the projector, controlling a heat sink of the projector based on the first temperature when the second temperature is smaller than a predetermined value, and controlling the heat sink of the projector based on the second temperature when the second temperature is larger than the predetermined value.

Abstract: An electronic device comprises a body having a side portion, a first heat source disposed in the body, a first heat dissipation unit generating a first initial airflow to substantially pass through the first heat source, a second heat source generating a second initial airflow to pass through the second heat source and to move toward the side portion of the body, a second heat dissipation unit, and a guiding element disposed on the path of the first and second initial airflows. The first and second initial airflows traveling through the guiding element is respectively converted into a first predetermined airflow and a second predetermined airflow. The first and second predetermined airflows are expelled by the second heat dissipation unit through the side portion of the body.

Abstract: While turning on a projection device, the projection device determines whether a light source has been cooled down. If so, the projection device directly turns on the light source. Otherwise, the projection device performs a cooling procedure, and then turns on the light source.

Abstract: A filtering device and a projector utilizing the same. The filtering device receives an electronic device therein, and includes a housing, a filter, a fan, a first temperature sensor, a second temperature sensor, a circuit board, and an alarm. The first temperature sensor detects a first temperature outside the housing. The second temperature sensor detects a second temperature inside the housing. The circuit board includes a controller to be coupled to the fan, the first temperature sensor, and the second temperature sensor. When the second temperature detected by the second temperature sensor exceeds the first temperature detected by the first temperature sensor, the voltage of the fan is increased by the controller to increase the rotation speed of the fan. The alarm is coupled to the controller. When the voltage of the fan exceeds a critical value, the alarm is actuated to indicate that the filter needs to be changed.

Abstract: A temperature control method for a display device comprising a lamp box for emitting a light, a fan for cooling down the display device and a digital image device for receiving the light from the lamp box and forming an image, comprises acquiring an operating time of the lamp box; calculating a temperature offset in accordance with the operating time of the lamp box; acquiring a temperature value of the digital image device; calculating a control value in accordance to the temperature value and the temperature offset; controlling the fan in accordance with the control value.

Abstract: A heat pipe structure with an external liquid detouring path includes a main pipe having an interior space and divided into a top portion, a middle portion and a bottom portion. In the middle portion, a circular liquid-collecting groove facing the top portion is constructed for collecting a liquid drained down along the inner wall of the pipe. The heat pipe also includes a bifurcated pipe to detour the liquid in the liquid-collecting groove to the bottom portion of the heat pipe.