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.

An aircraft projection device includes a projector that displays an image by projecting the image onto a floor surface of a passage in an interior of an aircraft; and a controller that controls the projector to display the image onto the floor surface of the passage in the interior of the aircraft.

An aircraft projection device includes a projector that displays an image by projecting the image onto a floor surface of a passage in an interior of an aircraft; and a controller that controls the projector to display the image onto the floor surface of the passage in the interior of the aircraft.

An optical projection device for projecting a linear image is disclosed. Light emitted by an array of light emitting diodes arranged along an array axis is focused in at least a direction perpendicular to the array axis and diffused in a direction parallel to the array axis, thereby generating a linear image in which light from adjacent light emitting diodes is spatially overlapped. In some embodiments, the focusing and diffusion of the light is performed by a Fresnel lens and a lenticular lens, respectively. The optical projection device may be employed to virtually mark a surface, such as a floor in an industrial setting. High power light emitting diodes may be employed to generate a linear image having an illuminance of at least 4000 lux that is focused to a distance between 7.5 and 20 feet.

Visual aid timer systems comprise a visual aid timer that may be displayed to users, and synchronized to an audible alert signal providing expirations of time intervals and/or indications of start and/or stop times in a plurality of intervals used in physical fitness training and/or testing. The visual aid timer system provides a visual indication of time remaining in each of the plurality of intervals for viewing by users thereof. Methods of using the same are further provided.

Visual aid timer systems comprise a visual aid timer that may be displayed to users, and synchronized to an audible alert signal providing expirations of time intervals and/or indications of start and/or stop times in a plurality of intervals used in physical fitness training and/or testing. The visual aid timer system provides a visual indication of time remaining in each of the plurality of intervals for viewing by users thereof. Methods of using the same are further provided.

Embodiments of the present disclosure provide an unmanned store. The unmanned store includes a projection device, a rotation device, a functional keypad, and a control system. The projection device is configured to project a virtual image to a real space of the unmanned store; the rotation device is connected to the projection device, and is configured to drive the projection device to rotate such that the virtual image moves in the real space; the functional keypad includes a functional key, and is configured to send a key signal to a control system in response to the functional key being pressed; the control system is communicably connected to the projection device, the rotation device, and the functional keypad, and is configured to receive the key signal, and switch the virtual image of the projection device based on the key signal.

Embodiments of the present disclosure provide an unmanned store. The unmanned store includes a projection device, a rotation device, a functional keypad, and a control system. The projection device is configured to project a virtual image to a real space of the unmanned store; the rotation device is connected to the projection device, and is configured to drive the projection device to rotate such that the virtual image moves in the real space; the functional keypad includes a functional key, and is configured to send a key signal to a control system in response to the functional key being pressed; the control system is communicably connected to the projection device, the rotation device, and the functional keypad, and is configured to receive the key signal, and switch the virtual image of the projection device based on the key signal.

In an embodiment, an animated figure display system includes an animated figure having a body and a first tracker coupled to the body. The animated figure display system includes a projection surface having a second tracker coupled to the projection surface. The projection surface moves between a first position and a second position and the projection surface is at least partially concealed behind the animated figure in the first position. The animated figure display system includes a tracking camera that detects the first tracker and the second tracker and generates location data. A controller receives the location data and generates a control signal based on the location data. A projector receives the control signal indicative of image content from the controller and projects the image content onto the body of the animated figure and the external surface of the projection surface.

In an embodiment, an animated figure display system includes an animated figure having a body and a first tracker coupled to the body. The animated figure display system includes a projection surface having a second tracker coupled to the projection surface. The projection surface moves between a first position and a second position and the projection surface is at least partially concealed behind the animated figure in the first position. The animated figure display system includes a tracking camera that detects the first tracker and the second tracker and generates location data. A controller receives the location data and generates a control signal based on the location data. A projector receives the control signal indicative of image content from the controller and projects the image content onto the body of the animated figure and the external surface of the projection surface.