[Solving Means] A projector according to the present technology includes a lightbulb, a projection section, and a replacement mechanism. The lightbulb modulates light. The projection section projects light modulated by the lightbulb. The replacement mechanism holds a transmissive member arranged on an optical path between the lightbulb and the projection section and is capable of replacing the transmissive member.

A convertible panel includes a number of sub-panels which are movable between a first position in which the panels extend in the same plane to define a unified panel and a configuration in which one or more of the panels are moved into other planes which allow them to form steps. Multiple of the rotated panels may form a sequence of steps, e.g. a staircase. The convertible panel may be moved via a robotic mount, whereby the position or orientation of the convertible panel may be changed.

A convertible panel includes a number of sub-panels which are movable between a first position in which the panels extend in the same plane to define a unified panel and a configuration in which one or more of the panels are moved into other planes which allow them to form steps. Multiple of the rotated panels may form a sequence of steps, e.g. a staircase. The convertible panel may be moved via a robotic mount, whereby the position or orientation of the convertible panel may be changed.

A hand lifting device and a projection apparatus are provided. The hand lifting device is adapted to carry an object, and includes a support pad and a carrying strap. The support pad has a first surface and a second surface opposite to each other, and has two first connecting portions. The carrying strap has two end portions, and the two end portions respectively have a second connecting portion. The carrying strap is configured to partially surround the object, such that the second connecting portions of the carrying strap are respectively detachably connected to the first connecting portions of the support pad. The projection apparatus comprises the above hand lifting device and a projector.

Embodiments of the present disclosure, relating to the technical field of projection and display, provide a projection device. The projection device includes a projecting unit, a dust-proof device, and an adjusting unit. The dust-proof device includes a housing, a first light-transmissive plate, and a second light-transmissive plate. The housing is provided with a receiving chamber. The projecting unit is disposed in the dust-proof device, and the dust-proof device achieves a dust-proof function for the projecting unit. In addition, part of the projection light beam of the projecting unit may be emitted from the first light-transmissive plate of the dust-proof device to achieve projection in a first direction, and may be emitted from the second light-transmissive plate to achieve projection in a second direction. The adjusting unit disposed on the dust-proof device may adjust the projection direction of the projection light beam emitted from the second light-transmissive plate to enlarge a projection range in the second direction. According to the embodiments of the present disclosure, multi-direction projection and dust-proofing are implemented.

Embodiments of the present disclosure, relating to the technical field of projection and display, provide a projection device. The projection device includes a projecting unit, a dust-proof device, and an adjusting unit. The dust-proof device includes a housing, a first light-transmissive plate, and a second light-transmissive plate. The housing is provided with a receiving chamber. The projecting unit is disposed in the dust-proof device, and the dust-proof device achieves a dust-proof function for the projecting unit. In addition, part of the projection light beam of the projecting unit may be emitted from the first light-transmissive plate of the dust-proof device to achieve projection in a first direction, and may be emitted from the second light-transmissive plate to achieve projection in a second direction. The adjusting unit disposed on the dust-proof device may adjust the projection direction of the projection light beam emitted from the second light-transmissive plate to enlarge a projection range in the second direction. According to the embodiments of the present disclosure, multi-direction projection and dust-proofing are implemented.

A projector includes a projector main body including an optical unit for generating an image light beam, and a projection optical device attached to a mounting part of the projector main body, and projecting the image light beam generated by the optical unit on a screen, a chassis of the projection optical device includes a camera attachment part to which a camera is attached, and an imaging range of the camera attached to the camera attachment part includes at least a part of a projection image projected by the projection optical device.

A projector system includes a connector attachable to a lighting wiring base mounted on a ceiling surface of a room, a housing hanging from the connector, a communicator accommodated in the housing to obtain content to be projected onto a wall surface of the room, a projection unit accommodated in the housing to emit emission light to project a picture including the content onto the wall surface, a brightness sensor to sense a brightness of the room, and a corrector to control the emission light to correct an effect of a state of the wall surface on the projected picture in accordance with the brightness of the room.

A projector system includes a connector attachable to a lighting wiring base mounted on a ceiling surface of a room, a housing hanging from the connector, a communicator accommodated in the housing to obtain content to be projected onto a wall surface of the room, a projection unit accommodated in the housing to emit emission light to project a picture including the content onto the wall surface, a brightness sensor to sense a brightness of the room, and a corrector to control the emission light to correct an effect of a state of the wall surface on the projected picture in accordance with the brightness of the room.

A projector mount assembly for a sports enclosure includes a frame structure mountable to rear and front cross beams of a sports enclosure, at least one extension bracket secured to the frame structure and mountable to the front cross beam, and a projector mounting arm mounted to the at least one extension bracket and extending forwardly therefrom. The projector mounting arm is adapted to support, and facilitate front-to-back adjustment of, a projector. The projector mounting arm is pivotable relative to the at least one extension bracket to facilitate adjustment of an elevation of the projector.