Abstract: A liquid cooled heat dissipation device including a housing, at least two cooling fin modules, an input pipe, and an output pipe is provided. The housing has an accommodation space. The at least two cooling fin modules are disposed in the accommodation space. The input pipe is disposed on the top plate, the front plate, the rear plate, or one of the side plates of the housing and communicates with the accommodation space. The output pipe is disposed on the top plate, the front plate, the rear plate, or the other one of the side plates of the housing and communicates with the accommodation space. The at least two cooling fin modules have different arrangement densities and different fin thicknesses.

Abstract: The invention provides a liquid-cooling device, including a shell, wherein the shell includes a top plate, a bottom plate, a front plate, a rear plate and two opposite side plates, and form an accommodating space. At least one water inlet pipe is disposed on the top plate of the shell and communicates with the accommodating space. At least one water outlet pipe is disposed on the front plate of the shell and communicates with the accommodating space. A plurality of heat-dissipating fins is disposed in the accommodating space. A partition plate is disposed in the accommodating space. The partition plate forms at least two flow passages in the accommodating space.

Abstract: The invention discloses a heat dissipation module, comprising a plurality of heat dissipation fins and a plurality of heat pipes. The heat dissipation fins are spaced apart from each other and disposed side by side. A gas flow passageway is formed between two adjacent heat dissipation fins. The gas flow passageway has an inlet end and an outlet end. The outlet end is opposite to the inlet end. Each of the heat pipes is threaded through the heat dissipation fins along an extension direction. In a cross section of each of the heat pipes perpendicular to the extension direction, a maximum length in a first longitudinal direction is L1, a maximum length in a second longitudinal direction is L2, and L1>L2. The invention further provides a heat dissipation module for a projector. The heat dissipation module of the invention is used for enhancing the efficiency of heat dissipation.

Abstract: A wavelength conversion device includes a main body, at least one wavelength conversion layer, at least one heat dissipation plate, a heat conducting component and a driving unit. The wavelength conversion layer is disposed on the main body. The heat dissipation plate is disposed on a side of the main body with an interval. The heat conducting component is connected between the heat dissipation plate and the main body. The driving unit is connected to the main body and the heat dissipation plate and adapted to drive the main body and the heat dissipation plate to rotate. The driving unit and the heat conducting component have a gap therebetween. In addition, a projector including the wavelength conversion device is also provided. The wavelength conversion device according to the disclosure has good heat dissipation efficiency.

Abstract: A wheel assembly includes a housing, a wheel, and a thermal conductive assembly. The wheel is disposed inside of an enclosure of the housing, and includes a first surface, a second surface, and a wavelength conversion layer formed on a coating area of the first surface and configured to convert wavelength of a light beam. The thermal conductive assembly includes a thermal conductive structure and a thermal conductive tube. The thermal conductive structure corresponds to an edge contour of the wheel and is disposed adjacent to an outer edge of the wheel. The thermal conductive tube is coupled to the thermal conductive structure and partially protrudes to an exterior of the housing for conducting heat generated by the wheel from the thermal conductive structure to the exterior of the housing. The distance between the thermal conductive structure and the outer edge of the wheel falls within 1-50 mm.

Abstract: A projector includes a casing, an optical engine module, and a heat dissipation module. The optical engine module is disposed in the casing. The heat dissipation module is disposed in the casing and includes a heat dissipation fin set. The heat dissipation fin set includes at least one heat dissipation fin and at least one turbulent structure. The heat dissipation fin has a surface. The surface includes a first turbulent region and a second turbulent region. The first turbulent region is adjacent to the second turbulent region. The turbulent structure is disposed at least one of the first turbulent region and the second turbulent region, and the turbulent structure protrudes from the surface. An opening is formed between a top end of the turbulent structure and the surface.

Abstract: A light source module of a projector includes a light source having a lamp axis, a fan for providing a cooling airflow, and a flow guide device disposed between the light source and the fan and for guiding the cooling airflow. The flow guide device includes a first air channel connected between a side of the light source and an air outlet of the fan, a second air channel connected between another side of the light source and the air outlet of the fan, and a first airflow control assembly disposed in the first air channel and for controlling the first air channel either in communication or non-communication states via gravity. The first airflow control assembly has a first control rotating shaft inclined relative to the lamp axis and a first included angle between the first control rotating shaft and the lamp axis is less than 90 degrees.

Abstract: An antenna includes a radiator, a first feeding portion, a second feeding portion, a first grounding portion, a second grounding portion, and a loading portion. The radiator is parallel to the base board to radiate signals. A first end of the first feeding portion is electrically coupled to a central position of the radiator. A second end of the first feeding portion receives a first feeding signal to generate a first radiation pattern. A first end of the second feeding portion is electrically coupled to a first corner of the radiator. A second end of the second feeding portion receives a second signal to generate a second radiation pattern. The first grounding portion is electrically coupled between a second corner of the radiator and a ground plane of the base board. The second grounding portion is electrically coupled between a third corner of the radiator and the ground plane.

Abstract: An antenna includes a radiator, a first feeding portion, a second feeding portion, a first grounding portion, a second grounding portion, and a loading portion. The radiator is parallel to the base board to radiate signals. A first end of the first feeding portion is electrically coupled to a central position of the radiator. A second end of the first feeding portion receives a first feeding signal to generate a first radiation pattern. A first end of the second feeding portion is electrically coupled to a first corner of the radiator. A second end of the second feeding portion receives a second signal to generate a second radiation pattern. The first grounding portion is electrically coupled between a second corner of the radiator and a ground plane of the base board. The second grounding portion is electrically coupled between a third corner of the radiator and the ground plane.

Abstract: A projector includes a housing, a light source device, a light engine module and a lens module. The housing has an air inlet and an air outlet. The light source device is disposed in the housing and located between the air inlet and the air outlet. The light source device provides an illumination beam. The light source device includes a plurality of light sources and correspondingly-connected heat dissipating elements. The light sources include a first, second and third light sources. The heat dissipating elements include a first and second heat dissipating elements adjacent to the air inlet and the air outlet respectively. The first and second light sources are connected to the first and second heat dissipating elements respectively. The light engine module is adapted to convert the illumination beam into an image beam. The lens module is adapted to convert the image beam into a projection beam.

Abstract: A heat dissipation module includes a heat dissipation fin set. The heat dissipation fin set includes a plurality of heat dissipation fins, wherein these heat dissipation fins are stacked on each other, and each of the heat dissipation fins has a front side, a rear side opposite to the front side and at least one turbulent structure set. The turbulent structure set is located between the front side and the rear side and includes a plurality of first turbulent structures. The first turbulent structures are arranged from the front side to the rear side in sequence. A heat dissipation airflow flows from the front side toward the turbulent structure set along a flowing direction, and passes through the turbulent structure set to flow toward the rear side. An extending direction of each of the first turbulent structures is tilted relative to the flowing direction.

Abstract: The invention discloses an oscillating lens module and a projector. The oscillating lens module includes a frame, a first coil, a lens, and a second coil. The first coil and the second coil are connected to the frame and located in a magnetic field, wherein the first coil and the second coil are adapted to be electrified and to oscillate about a first axis and a second axis respectively via the magnetic field. The lens is connected to the first coil, wherein the lens is adapted to oscillate along with the first coil. An oscillation phase of the second coil is opposite to an oscillation phase of the first coil, such that forces applied on the frame by the first coil and the second coil are counterbalanced, so as to prevent the oscillating lens module from over vibrating which makes projection images shake and makes noise.

Abstract: A projection apparatus includes a housing and at least one thermal transfer module. The housing includes at least one air inlet and at least one air outlet. The thermal transfer module includes a flow-guiding structure, at least one fan, and at least one heat source. The flow-guiding structure is configured in the housing, and connected between the air inlet and the air outlet to form a flow channel. The fan is configured in the flow channel. The heat source is configured in the flow channel, and is at least partially located between the fan and air outlet. The invention further relates to a thermal transfer module. A thermal transfer module is also provided. The projection apparatus and the thermal transfer module can lower noise generated by a fan, and have good heat dissipation efficiency.

Abstract: A projector includes a casing, an optical engine module, and a heat dissipation module. The optical engine module is disposed in the casing. The heat dissipation module is disposed in the casing and includes a heat dissipation fin set. The heat dissipation fin set includes at least one heat dissipation fin and at least one turbulent structure. The heat dissipation fin has a surface. The surface includes a first turbulent region and a second turbulent region. The first turbulent region is adjacent to the second turbulent region. The turbulent structure is disposed at least one of the first turbulent region and the second turbulent region, and the turbulent structure protrudes from the surface. An opening is formed between a top end of the turbulent structure and the surface.

Abstract: A projection apparatus includes a housing, a projection module, an electronic assembly and a heat dissipating module. The housing has first to fourth sides. The first and second sides are provided with air outlet and first air inlet respectively. A containing space is defined in the housing and has first and second areas. The heat dissipating module includes first to third heat dissipating members and first to second fans. The first, second, third heat dissipating members are connected to a light source module of the projection module. The first heat dissipating member is close to the air outlet. The second heat dissipating member is in the first area. The third heat dissipating member is in the first area and close to the second air inlet.

Abstract: A light source module of a projector includes a light source having a lamp axis, a fan for providing a cooling airflow, and a flow guide device disposed between the light source and the fan and for guiding the cooling airflow. The flow guide device includes a first air channel connected between a side of the light source and an air outlet of the fan, a second air channel connected between another side of the light source and the air outlet of the fan, and a first airflow control assembly disposed in the first air channel and for controlling the first air channel either in communication or non-communication states via gravity. The first airflow control assembly has a first control rotating shaft inclined relative to the lamp axis and a first included angle between the first control rotating shaft and the lamp axis is less than 90 degrees.

Abstract: A light source module adapted to a projector includes a light source, a light combining system, a first cooling fan, a second cooling fan, a first guide duct and a second guide duct. The light source includes a first light emitting device and a second light emitting device. The light combining system is disposed between the first light emitting device and the second light emitting device. The first cooling fan is disposed on the first light emitting device. The second cooling fan is disposed on the second light emitting device. The first guide duct is connected to the first cooling fan and guides a cooling airflow provided by the first cooling fan to the second light emitting device. The second guide duct is connected to the second cooling fan and guides a cooling airflow provided by the second cooling fan to the first light emitting device.

Abstract: An air filter module adapted to be used with a projection module and disposed to cover an air vent of the projection module. The air filter module includes a filter component and a cleaning unit. The cleaning unit is disposed to cover the air vent and configured to drive the filter component to have a movement so as to remove the dust on the filter component according to a cleaning-start signal. A projection device adopting the air filter module is also provided.

Abstract: A projection apparatus includes a housing, a projection module, an electronic assembly and a heat dissipating module. The housing has first to fourth sides. The first and second sides are provided with air outlet and first air inlet respectively. A containing space is defined in the housing and has first and second areas. The heat dissipating module includes first to third heat dissipating members and first to second fans. The first, second, third heat dissipating members are connected to a light source module of the projection module. The first heat dissipating member is close to the air outlet. The second heat dissipating member is in the first area. The third heat dissipating member is in the first area and close to the second air inlet.

Abstract: A wheel assembly includes a housing, a wheel, and a thermal conductive assembly. The wheel is disposed inside of an enclosure of the housing, and includes a first surface, a second surface, and a wavelength conversion layer formed on a coating area of the first surface and configured to convert wavelength of a light beam. The thermal conductive assembly includes a thermal conductive structure and a thermal conductive tube. The thermal conductive structure corresponds to an edge contour of the wheel and is disposed adjacent to an outer edge of the wheel. The thermal conductive tube is coupled to the thermal conductive structure and partially protrudes to an exterior of the housing for conducting heat generated by the wheel from the thermal conductive structure to the exterior of the housing. The distance between the thermal conductive structure and the outer edge of the wheel falls within 1-50 mm.