Abstract: An optical engine module includes a cover, a light valve module, and a thermal glue. The cover has at least one filling hole, and includes a cover part having an opening, and support parts and connection parts vertically connected to the cover part. The light valve module includes a base disposed on the support parts, and a light valve element having a light emitting surface and a peripheral surface connected thereto. The light emitting surface corresponds to the opening and is spaced apart from the cover part. The connection parts surround the peripheral surface. The filling hole communicates with a space between the peripheral surface and the cover. The thermal glue is disposed between the light valve module and the cover, and connects the base, the peripheral surface, the cover part, the connection parts, and the support parts. A projection device includes the optical engine module, which achieves favorable heat dissipation efficiency.

Abstract: A wavelength conversion device includes a wavelength conversion element, at least one condenser lens, at least one fixing device, a heat dissipation wind flow device, and a wind guide structure. The wavelength conversion element includes a substrate, a wavelength conversion layer, and a driving component. The substrate has a first surface and a second surface opposite to each other. The wavelength conversion layer is disposed on the first surface, and the driving component drives the substrate to rotate about a rotary shaft of the driving component as a central axis. The condenser lens is arranged on one side of the first surface of the wavelength conversion element and fixed to the fixing device. The fixing device has at least one vent. The wind guide structure is connected to the heat dissipation wind flow device and the vent.

Abstract: The invention provides a heat dissipation system and a projection device including the same. The heat dissipation system includes a case, a plurality of liquid cold plates, a first radiator and a second radiator. The case includes a main air inlet and an air outlet. The liquid cold plates are disposed in the case. The first radiator is disposed in the case and beside the main air inlet. The second radiator is disposed in the case and beside the air outlet. The liquid cold plates, the first radiator and the second radiator are connected with one another. The invention has a good heat radiating effect.

Abstract: A wavelength conversion module includes a wavelength conversion unit, a support bracket, a lens holder, a condenser lens, and a thermally conductive material. The wavelength conversion unit is disposed on the support bracket. The lens holder is disposed on the support bracket, and has an accommodation space to accommodate the condenser lens. An inner wall of the lens holder is arranged with a bearing surface. The condenser lens has an annular assembly surface. The condenser lens is disposed on the bearing surface through the annular assembly surface to be fixed to the lens holder. The thermally conductive material is disposed between the annular assembly surface of the condenser lens and the bearing surface of the lens holder to transfer heat from the condenser lens to the lens holder.

Abstract: A heat dissipation module adapted to dissipate the heat of a wavelength conversion device located inside a closed housing is provided. The heat dissipation module includes a first heat exchange element, a first cooling element, a second heat exchange element and a first heat conductive structure. The first heat exchange element is disposed inside the closed housing. The first cooling element has a cold side and a hot side opposite each other. The first cooling element is disposed inside the closed housing, and the cold side is located between the hot side and the first heat exchange element. The second heat exchange element is disposed outside the closed housing. One end of the first heat conductive structure is connected to the hot side of the first cooling element, and the other end of the first heat conductive structure is connected to the second heat exchange element.

Abstract: A projection device includes a housing, and a light source module, an optical engine module, a liquid cooling module, a first fan group and a projection lens disposed in an accommodating space. A light emitting side plate, an air outlet side plate, and a first and a second side plate surround the accommodating space. The air outlet side plate has an air outlet, and at least one of the light emitting side plate, and the first and the second side plate has at least one air inlet. The liquid cooling module includes a heat exchanger. The first fan group is located between the heat exchanger and the air outlet. An orthographic projection area of the cooling fin set of the heat exchanger on the air outlet side plate is smaller than or equal to an orthographic projection area of the first fan group on the air outlet side plate.

Abstract: A cooling system includes a flow channel structure including flow channel substrates, a first outer substrate, a first inner adsorption layer, a first outer adsorption layer, and a first heat insulating layer and a first cooling chip having a cold side and a hot side opposite to each other. The flow channel substrates surround to form an air flow channel and include a first inner substrate with a second surface facing the air flow channel and a first surface disposed on the cold side. A first surface of the first outer substrate is disposed on the hot side. The first inner adsorption layer is disposed on the second surface of the first inner substrate. The first outer adsorption layer is disposed on a second surface of the first outer substrate. The first heat insulating layer is disposed between the first inner substrate and the first outer substrate.

Abstract: Disclosed are an optical engine module and a projection device. The optical engine module includes a housing, a prism component, a light valve, an air guiding channel, a first fan, and a first heat-dissipating module. The housing has a first opening and a second opening. The prism component is disposed in the housing. The light valve is disposed in the housing. The air guiding channel is disposed outside the housing and communicates with the first opening and the second opening of the housing. The first fan is disposed in the air guiding channel. The first heat-dissipating module includes a first heat-dissipating fin disposed in the air guiding channel, and a second heat-dissipating fin disposed outside the air guiding channel.

Abstract: A rotation wheel including a turntable and a motor is provided. The turntable is connected to the motor. The turntable has a first surface used for receiving an incident beam and a second surface opposite to the first surface. The first surface includes a light adjusting surface and a connecting surface. The connecting surface is used to connect the light adjusting surface and the motor. The light adjusting surface is perpendicular to a rotating axis of the motor. At least a part of the connecting surface is neither parallel nor perpendicular to the rotating axis.

Abstract: A heat dissipation module and a projection device are provided. The heat dissipation module is used to dissipate heat from an integrating element of the projection device. The integrating element has a light incident surface, a light-emitting surface, and an optical axis. The heat dissipation module includes a rotating member, a first fixing frame, and a second fixing frame. The rotating member is adjacent to the light incident surface and includes a substrate and a driving device. The first fixing frame surrounds the integrating element along a circumferential direction of the integrating element. The first fixing frame has a peripheral surface and fins disposed at intervals. An extending direction of each fin is not parallel to the optical axis. The second fixing frame surrounds along a circumferential direction of the first fixing frame and has a space with the peripheral surface. The fins are disposed in the space.

Abstract: A projection device includes a housing, a spacer plate, and a heat dissipation module. The spacer plate is disposed in the housing to divide the housing into a first space and a second space. The heat dissipation module includes a radiator, a heat dissipation plate, a driving element, and a tube. The radiator is located in the first space, and the heat dissipation plate is located in the second space. The first space has a first air inlet and a first air outlet. A first cooling air flow enters the first space from the first air inlet, flows through the radiator, and is discharged from the first air outlet. The second space has a second air inlet and a second air outlet. A second cooling air flow enters the second space from the second air inlet, and is discharged from the second air outlet.

Abstract: An optical engine module including a housing, an optical element, a positioning member, and a heat dissipation assembly is provided. The optical element and the positioning member are arranged in the housing. The positioning member abuts and positions the optical element. The heat dissipation assembly is coupled to the positioning member. The heat dissipation assembly absorbs heat generated by the optical element through the positioning member and transmits the heat outside the housing. A projection device is also provided.

Abstract: Provided is a rotary optical module, including a drive device, an optical turntable, a balance ring, at least one counterweight device, and multiple protruding structures. The drive device includes a rotary axis, extending along a first direction. The optical turntable and the balance ring are both sleeved on the rotary axis of the drive device, and the balance ring is located between the drive device and the optical turntable. The balance ring includes an outer retaining wall, located at the edge of the balance ring. The at least one counterweight device is disposed on the balance ring and abuts against the inner side of the outer retaining wall. The protruding structures are radially arranged on the balance ring with the rotary axis as the center, and the height of the protruding structures in the first direction is greater than the height of the outer retaining wall in the first direction.

Abstract: A rotation wheel including a turntable and a motor is provided. The turntable is connected to the motor. The turntable has a first surface used for receiving an incident beam and a second surface opposite to the first surface. The first surface includes a light adjusting surface and a connecting surface. The connecting surface is used to connect the light adjusting surface and the motor. The light adjusting surface is perpendicular to a rotating axis of the motor. At least a part of the connecting surface is neither parallel nor perpendicular to the rotating axis.

Abstract: An optical engine module including a circuit board, a light valve module, a thermal conductive member, and a supporting member is provided. The circuit board having a first surface, a second surface opposite to the first surface, a first opening hole and at least one second opening hole. The light valve module is disposed on the first surface and electrically connected to the circuit board. The thermal conductive member is disposed on the second surface of the circuit board and is connected to a back surface of the light valve module through the first opening hole of the circuit board. A supporting member is disposed on one side of the first surface of the circuit board. The supporting member is partially in contact with the light valve module, and is connected to the thermal conductive member through the at least one second opening hole of the circuit board.

Abstract: The invention provides a heat dissipating module configured to dissipate heat of at least one heating element of a projection device. The heat dissipating module includes a first radiator, a second radiator, a pipe, and at least one fan. The second radiator is disposed opposite to the first radiator. The heating element, the first radiator, and the second radiator are connected to each other through the pipe to form a loop. A working fluid is configured to be filled in the pipe, and the working fluid flows through the first radiator after flowing through the second radiator for heat exchange, and the working fluid flowing into the first radiator flows to the heating element for cyclic heat dissipation after heat exchange again through the first radiator. The fan is configured between the first radiator and the second radiator.

Abstract: A heat dissipation module is for a wheel module with a motor. The heat dissipation module includes a supporting member and a fan. The supporting member has a supporting portion, a fixing portion and connecting portions. The fixing portion is located in a ventilation hole of the supporting portion and connected to the supporting portion by the connecting portions. The fixing portion has opposite first and second side surfaces. The first side surface is connected to the motor. The fan is disposed on the second side surface. The fan has an air outlet facing the ventilation hole. On a plane parallel to the first side surface, the air outlet and the ventilation hole partially overlap, a cross-sectional area of the ventilation hole is greater than that of the fixing portion, and the cross-sectional area of the fixing portion is greater than or equal to that of the motor.

Abstract: A projection device and a heat dissipation control method are provided. The projection device includes a closed accommodating space, and a heating element, a cooling element, and an active dehumidification unit that are located inside the closed accommodating space.

Abstract: A light wavelength conversion element is configured to receive an excitation beam from a light incident side, comprising a substrate and a light wavelength conversion substance. The substrate has a surface facing the light incident side. The surface has at least one microstructure protruded toward the light incident side. The light wavelength conversion substance is disposed on the surface and covers the at least one microstructure. The light wavelength conversion substance is excited by the excitation beam and emits a conversion beam. The excitation beam forms an exciting light spot on the light wavelength conversion substance. The energy density distribution of the exciting light spot has at least one peak value. A position corresponding to the at least one peak value on the light wavelength conversion substance corresponds to a position of the at least one microstructure. Additionally, a projection apparatus is provided.

Abstract: The invention provides a heat dissipation system and a projection device including the same. The heat dissipation system includes a case, a plurality of liquid cold plates, a first radiator and a second radiator. The case includes a main air inlet and an air outlet. The liquid cold plates are disposed in the case. The first radiator is disposed in the case and beside the main air inlet. The second radiator is disposed in the case and beside the air outlet. The liquid cold plates, the first radiator and the second radiator are connected with one another. The invention has a good heat radiating effect.