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.

A spray device (A) according to the present disclosure includes: a two-fluid nozzle (11) which sprays a mist (91); a spray-device-side gas flow path (12) for supplying a gas to the two-fluid nozzle (11); a gas supply source (17) which supplies the gas to the spray-device-side gas flow path (12); a spray-device-side liquid flow path (13) for supplying a liquid to the two-fluid nozzle (11); a liquid supply source (18) which supplies the liquid to the spray-device-side liquid flow path (13); a pulse-driven liquid flow control valve (14) having a valve opening degree that is adjusted according to a pulse signal to control the flow rate of the liquid in the spray-device-side liquid flow path (13); and a controller (30) which adjusts, in multiple levels, the concentration of the mist (91) sprayed from the two-fluid nozzle 11 by adjusting the valve opening degree of the liquid flow control valve 14.

Display devices and programs display a guide image on a display mounted on a vehicle so as to be visually recognized such that the guide image is superimposed on a view ahead of the vehicle. The guide image provides guidance about a travel direction of the vehicle that travels on a travel path after leaving a guide branch point. The devices and programs display the guide image in a manner such that a region overlapping a nearby object present on a near side of the travel path on which the vehicle travels is removed from the guide image.

An image display apparatus according to an embodiment of the present technology includes a polarizer, a polarization conversion element, and a ¼ wave plate. The polarizer causes to transmit linearly polarized light having a predetermined polarization direction. The polarization conversion element converts a polarization state of the linearly polarized light transmitted through the polarizer and emits the light as light in a non-polarized state. The ¼ wave plate is arranged on an optical path of the light in the non-polarized state emitted from the polarization conversion element.

A projection lens has a first rotary tube, a first fixed tube at which the first rotary tube is rotatably mounted, a first protrusion portion that is provided at the first rotary tube and that protrudes from the first rotary tube, and a first abutment surface that is provided at the first fixed tube and that abuts upon the first protrusion portion. The projection lens includes a first engaging portion at which the first protrusion portion and the first abutment surface include first engaging portions that face each other in a direction of a first incidence-side optical axis and a first pressing portion that presses the first protrusion portion against the first abutment surface.

Provided is an image display apparatus that makes it possible to provide appropriate interaction with a user. The image display apparatus includes: a display displaying a three-dimensional image in such a manner that the three-dimensional object looks as if being in a space defined by a member constituting an external surface and that the three-dimensional object is visible from multiple directions around the display; a motion detector detecting the motion of the display itself caused by an external force; a motion calculation unit calculating the motion of the three-dimensional object caused by the motion of the display itself on the basis of the motion detected by the motion detector on the assumption that the three-dimensional object is actually present in the space; a display control unit changing the three-dimensional image displayed on the display on the basis of the result of calculation by the motion calculation unit; a force sense presentation unit presenting the sense of force to the user of an own apparatus; and a force sense control unit causing the force sense presentation unit to present the sense of force on the basis of the result of calculation by the motion calculation unit.

A vehicle includes a communicator configured to receive driving information from a management server, a controller configured to drive the vehicle on the basis of the driving information from the communicator, a manager configured to manage a compartment of the vehicle in which a service user receives a service from a service provider, and an interface set up in association with service-related information provided by the service provider and the compartment.

An information display system having acute-angled diffusion characteristics configured to display an image to inside or outside of a space via a transparent projected member, the information display system including an image projection apparatus, a transparent sheet provided on an inner surface of a display region set on a part of the projected member; and a light direction changing unit that directs a direction of image light toward the transparent sheet of the display region, the image projection apparatus including an image light characteristic converting unit, and an image light control film that restricts an emission direction of the image light being provided on an upper surface of the image projection apparatus, so that the image light is not directly delivered to an observer and the image light reflected by the transparent sheet is recognized by the observer.

A prediction calculation unit calculates a predicted position from a trajectory of a tracking target. A drive calculation unit calculates an imaging direction of an imaging unit that images the tracking target, the imaging direction in which the predicted position is included in an angle of view of the imaging unit when the predicted position calculated by the prediction calculation unit deviates from the angle of view. Therefore, for example, the number of movements can be reduced as compared with the case where the imaging direction always follows the tracking target so that the tracking target is at the center of the angle of view, and the tracking operation can be performed efficiently. Further, when the predicted position is within the angle of view, the imaging direction of the imaging device is fixed even if the position of the tracking target moves, so that the position of the tracking target can be detected with high accuracy.

A display system which controls a display of display content, includes: a processor; and a memory having stored thereon instructions executable by the processor. The instructions include: performing image correction processing involving a change in a display position of the display content based on image correction data stored in advance; detecting an attitude change amount of a moving body; calculating a vibration correction amount of the display position of the display content based on the attitude change amount of the moving body; switching an order of processing between image correction processing involving a change in the display position of the display content and vibration correction processing of correcting the display position of the display content based on the vibration correction amount; and controlling the display position of the display content by performing the image correction processing and the vibration correction processing based on the order of the processing.