An illumination device may include, but is not limited to: a shell portion; and a light projection device disposed at least partially within the shell portion, the light projection device including: at least one light source operably couplable to a power source; and at least one diffraction grating configured to distribute a light beam generated by the at least one light source onto an interior surface of the shell portion.

Provided is a light-emitting diode (LED) display device. The LED display device includes: a support; a plurality of display assemblies mounted on a front side of the support, wherein the plurality of display assemblies are arranged in an array on the support, each display assembly is slidably arranged in an upper-lower direction, and each display assembly includes a frame and an LED display screen detachably arranged on a front side of the frame; and a plurality of gas bags, wherein each gas bag is arranged between the frames of two display assemblies adjacent to each other in the upper-lower direction, each gas bag has an expanded state and a flat state, when the gas bag is in the flat state, two adjacent display assemblies located above and below the gas bag cooperate with each other in a contact manner, and when the gas bag is switched from the flat state to the expanded state, the frame above the gas bag can be driven to slide upwards, such that a detachment gap is formed between the two adjacent display assemblies located above and below the gas bag.

An inflatable model with lighting effects includes a light-transmissive inflatable body, an air supply component for inflating the interior of the light-transmissive inflatable body, and a main light source which emits light from the interior of the light-transmissive inflatable body. The light-transmissive inflatable body is divided into a plurality of decoration areas. Each decoration area is provided with at least one effect light source. According to the present invention, various lighting effect combinations on the inflatable model can be achieved, thus enriching the exhibition effect of the inflatable model. Therefore, the inflatable model in the present invention can attract attention of people more easily and is more suitable for activity meeting places with diversified lighting effect requirements such as Halloween, Christmas, and the like.

An unmanned aerial vehicle (UAV) expandable landing marker system may include a an expandable volume. The landing marker may be expanded prior to arrival of a UAV delivering an item to be received by the landing marker. The landing marker may be expanded by regulating an amount of fluid in the volume. An anchor may be coupled to the landing marker to restrain movement of the expanded landing marker. An optional retraction mechanism may retract the landing marker. The landing marker can be retracted with the deposited item, moving the item to a location for later retrieval.

A foldable doll includes: a doll body which is a hollow structure; a projection lamp disposed in the doll body; a power connector electrically connected to the projection lamp; a supporting assembly for supporting the doll body; a plurality of supporting rings sewn on the doll body; a blower connected to the doll body and electrically connected to the power connector. The projection lamp includes a lamp cover, a motor, and a projection unit. The motor includes a rotation shaft, and the projection unit is fixedly disposed on the rotation shaft and configured to emit and project light on the lamp cover. The blower is electrically connected to the power connector. In an unfolded state, the doll body is propped up by the supporting assembly, and in a folded state, the supporting assembly is detached from the doll body, and the doll body automatically collapses by gravity.

A crowd management system (CMS), is disclosed which includes a command and control (C2) subsystem, a sensor network in communication with the C2 subsystem and adapted to provide signals corresponding to geographical number of individuals in a venue, and one or more crowd management devices (CMDs) further in communication with the C2 subsystem, each of the CMDs including a base adapted to release air at a high pressure, the base further including a positional device adapted to position the base according to a selective position, and an inflatable body terminating into a predefined shape adapted to convey a predefined message to individuals near the CMDs.

Implementations of a novel inflatable are provided. In some implementations, the novel inflatable comprises an inflatable housing having an inner surface and an outer surface configured to store a gas therebetween to inflate and deflate the inflatable housing, and an inner opening extending through the inflatable housing surrounded by the inner surface and configured to receive and conceal an object therein when the inflatable is inflated.

In some implementations, a method for using the novel inflatable comprises receiving and concealing the object within the inner opening by inflating the inflatable housing, and revealing and releasing the object from the inner opening by deflating the inflatable housing.

A crowd management system (CMS), is disclosed which includes a command and control (C2) subsystem, a sensor network in communication with the C2 subsystem and adapted to provide signals corresponding to geographical number of individuals in a venue, and one or more crowd management devices (CMDs) further in communication with the C2 subsystem, each of the CMDs including a base adapted to release air at a high pressure, the base further including a positional device adapted to position the base according to a selective position, and an inflatable body terminating into a predefined shape adapted to convey a predefined message to individuals near the CMDs.

The present invention relates to an inflatable, moveable structure comprising: a fluid source; at least one chamber comprising a substantially inelastic outer membrane defining a cavity extending therebetween, in which the or each cavity is in fluid communication with the fluid source, and in which the or each chamber further comprises at least one first valve located on and extending through the outer membrane thereof; and a control system. The control system comprises at least one of: a plurality of pressure sensors, each pressure sensor located within a corresponding chamber and operable to determine the pressure of the fluid within the corresponding chamber and/or the pressure ratio of fluid within at least two chambers; and/or at least one spatial orientation sensor configured to determine the spatial orientation of the at least one chambers; in which the control system is operable to independently control operation of the at least one first and/or second valve in communication with the at least one chamber in response to one or more of the determined spatial orientation of the structure as determined by the spatial orientation sensor(s) and/or fluid pressure within the corresponding chamber(s) and/or pressure ratio of fluid within at least two chambers as determined by the pressure sensor(s).

A combination for performing work in a household environment includes a device with a performance unit for performing the work, a moving apparatus for moving the device on a surface, a control unit for controlling the moving apparatus for autonomous maneuvering on the surface, and a visualization component, wherein the visualization component includes a two-dimensional or three-dimensional visualization element in a shape of a human, an animal, a plant, a household object, a fantasy figure, a moving apparatus, in particular a vehicle, an airplane, or a ship, and wherein the visualization element is at least partially formed by a light projection and/or as an inflatable unit.