A HUD includes a light source unit 57, a light modulation element 54 that modulates light that is emitted from the light source unit 57, a projection portion that projects the modulated light onto a projection surface, wind guide paths 61 and 62 that guide wind W sent from an air conditioning device 9 of a car 100 to the light source unit 57, the wind guide path 61 that guides the wind W to the light modulation element 54, a shutter 63 for performing blocking and opening of the wind guide paths 61 and 62, and a system control unit 64 that selectively performs control for blocking the wind guide paths 61 and 62 and control for opening the wind guide paths 61 and 62 by controlling the shutter 63.

A moving apparatus includes a fixed unit including a first fixed plate and a second fixed plate that are arranged to face each other; a driving unit including a first member and a second member that operate in pairs; and a movable unit including a first part and a second part, the first part is arranged inside the fixed unit. The second part is arranged outside the fixed unit. A center of gravity of the movable unit is outside the fixed unit. The first member is arranged on one of the first fixed plate and the second fixed plate. The center of gravity of the movable unit is closer to the one of the first fixed plate and the second fixed plate than the other of the first fixed plate and the second fixed plate. The second member is arranged on the second part to face the first member.

A liquid cooling apparatus has a chassis, a cover mounted on the chassis, and a dividing structure disposed in an inner chamber defined between the chassis and the cover. The dividing structure divides the inner chamber into a liquid inlet compartment and a liquid outlet compartment. The liquid inlet compartment communicates with the liquid outlet compartment via the recess. The liquid cooling apparatus can be installed on a first panel with the boss of the chassis mounted through a through hole of the first panel and thermally attached to a heat source on a second panel. A working fluid that flows into the liquid inlet compartment is forced to flow into the recess before flowing to the liquid outlet compartment by the dividing structure. Accordingly, heat generated by the heat source can be effectively dissipated.

An image generating unit includes a fixed unit including a first fixed plate and a second fixed plate; and a movable unit movably supported by the fixed unit. The movable unit includes a movable part movably supported between the first fixed plate and the second fixed plate; an image generating part provided on the movable part and configured to receive illumination light to generate an image; and a heat radiating part coupled to the movable part and configured to radiate heat generated in the image generating part, the second fixed plate being sandwiched between the heat radiating part and the movable part.

An image generating unit includes a fixed member on which one of a driving magnet and a coil is provided; a heat radiating part on which the other of the driving magnet and the coil is provided; and an image generating part, to which the heat radiating part is attached, configured to receive illumination light to generate an image.

A light source unit includes an excitation light source, a luminescent material plate which receives excitation light emitted from the excitation light source to emit luminescent light, a drive module which moves the luminescent material plate in an in-plane direction of a surface of the luminescent material plate, and a drive control module which controls the drive module to move the luminescent material plate on a predetermined cycle.

Disclosed is a method for protecting a heat dissipation fan of a projecting device, including: when a heat dissipation fan is in a working state, obtaining fall-related information when a projecting device is falling; determining fall-related information of the heat dissipation fan according to the fall-related information of the projecting device; terminating the operation of the heat dissipation fan when the fall state information of the heat dissipation fan is in a falling state; resuming the operation of the heat dissipation fan when the fall state information of the heat dissipation fan is that the fall ends. Further disclosed is an apparatus for protecting a heat dissipation fan of a projecting device, corresponding to the method.

A phosphor wheel includes: a substrate having a first main surface, a second main surface opposite to the first main surface, and an open portion; a phosphor layer provided on the first main surface; and a fin provided on the second main surface. The fin is nearer a center of the substrate than the phosphor layer is, and the open portion is located between the phosphor layer and the fin.

A heat insulation structure of one embodiment of the present disclosure includes: a heat source; a heat insulating member surrounding the heat source and having an opening; and a shape retaining member retaining a shape of the heat insulating member.

The disclosure provides a heat dissipation device including a first fin structure and a heat conduction member. The first fin structure includes a first substrate and a plurality of first fins extending from the first substrate, the first fins include a plurality of first ends and a plurality of second ends. The plurality of first ends and the plurality of second ends are opposite to each other. The first ends are connected to the first substrate. The second ends are away from the first substrate, and the second ends contact the heat conduction member. The disclosure also provides a projector with the heat dissipation device. Through the heat dissipation device, the projector can achieve a good heat dissipation effect.