The disclosure provides a projection lens module and a projector having the projection lens module, which may effectively suppress the shaking of the projection lens. The projection lens module includes two casings, a projection lens and a carrier structure. The projection lens is disposed between the two casings. The carrier structure includes a bracket, at least one screwing member, and two buffer members. The bracket has at least one aperture, and the screwing member passes through the aperture to lock the bracket to the projection lens. A diameter of the aperture in a first direction is greater than a diameter of the aperture in a second direction perpendicular to the first direction. The two buffer members are respectively disposed on opposite ends of the bracket and lean against the two casings in the first direction, respectively.

A projection device configured to project an image in a projection direction is provided. The projection device includes a housing and a projection module. The housing has an air inlet and an air outlet, wherein the air inlet, the air outlet and the projection direction are in the same direction. The projection module is disposed inside the housing. The projection direction and a direction of gravity are in the same direction.

A projector controlling method includes acquiring first imaging information obtained by capturing a first image projected from a projector at a first timing, acquiring second imaging information obtained by capturing a second image projected from the projector at a second timing, evaluating whether or not a change in the posture of the projector satisfies a certain criterion based on the first imaging information and the second imaging information, and outputting information based on the result of the evaluating.

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.

There is provided a projection lens that is mounted on a housing of a projection device including an electro-optical element. The projection lens comprises an optical system through which light passes, a second holding unit through which light parallel to a second optical axis passes and which is moved rotationally with respect to the housing, a third holding unit through which light parallel to a third optical axis obtained from bending of the second optical axis passes and which is moved rotationally with respect to the second holding unit, an electric drive unit that electrically controls rotational movement of the second holding unit with respect to the housing, rotational movement of the third holding unit with respect to the second holding unit, or drive of the optical system, and a cover part that covers the electric drive unit.

In one aspect, a method includes the step of A mobile projection system; the system comprising: a hermetically sealed base unit configured to be releasably attached to an automobile; a microprocessor configured to receive a plurality of projectable images from a remote server over a wireless network; and a remote server configured to store a plurality of selected images over a period of time; a projection means configured to project a selected image through a translucent lens.

A computer simulation may include a tabletop game in which multiple players each wearing a head-mounted display (HMD) view a tabletop projector housing with a different aspect of the game for each side of the housing. A projector assembly may be inside the housing. The housing may be a screen that unfolds into cube, and the projector projects light in all four screens so that everyone gets different perspective. A player may be enabled to switch between perspectives for different player's angles.

A projection apparatus projects an image by an optical system having at least one optical characteristic being variable, and the projection apparatus includes a processor configured to perform a control of regulating a movement of a projection region to which the image is projected, based on the at least one optical characteristic in the optical system.

The present disclosure discloses a projection lamp for projecting a nebula and a starry sky comprising a housing, a light source assembly, a laser assembly, a rotating assembly, a control board, a base seat, and a power source port. The light source assembly and the laser assembly are disposed in the housing and penetrate through the housing, and the rotating assembly and the control board are disposed in the housing. The rotating assembly is configured to drive a rotating optical sheet and a diffraction sheet to rotate. The light source assembly comprises a light source board, a light reflecting cup, a fixed optical sheet, the rotating optical sheet, and a lens assembly. The light source board, the light reflecting cup, the fixed optical sheet, the rotating optical sheet, and the lens assembly are successively disposed along a path in which light rays emitted by the light source board move.

A passenger service unit is provided. The passenger service unit includes at least one projector configured to project an image onto one or more display surfaces, at least one sensor configured to indicate a current position of the one or more display surfaces, and a projector controller in communication with the at least one projector and the at least one sensor. The projector controller is programmed to receive a signal from the at least one sensor indicating a current position of a display surface and instruct the at least one projector to project at least one image onto the tray table based on the current position of the display surface.