The invention herein relates to a device and system for creating a consistent three-dimensional visual aid for traversing poorly lit or dark spaces by utilizing a device that creates multi-dimensional marking with an intuitive and consistent communicative pattern of marking design. The device further containing either self-illuminating material, light reflective material, or a combination of both.

The invention herein relates to a device and system for creating a consistent three-dimensional visual aid for traversing poorly lit or dark spaces by utilizing a device that creates multi-dimensional marking with an intuitive and consistent communicative pattern of marking design. The device further containing either self-illuminating material, light reflective material, or a combination of both.

A photoluminescent writing pad, wherein a) the writing pad is fastened to a back cover of a notebook and arranged to be turned to a writing pad of a page of the notebook, b) the writing pad is arranged to gleam through a writing page thus enabling reading and writing in darkness and c) the writing pad has notches for accommodating a spiral wire, especially spiral or wire or similar binding, of a notebook for securing the writing pad under the page of the notebook to function as an interleaf.

The embodiments provide a fluorescent rare earth complex having strong emission intensity and excellent durability, and also provide a security medium using the complex. The rare earth complex according to the embodiment comprises a rare earth ion, a diphosphine dioxide ligand and a β-diketone ligand wherein two phosphorus atoms contained in the diphosphine dioxide ligand individually have substituents different from each other.

The embodiments provide a fluorescent rare earth complex having strong emission intensity and excellent durability, and also provide a security medium using the complex. The rare earth complex according to the embodiment comprises a rare earth ion, a diphosphine dioxide ligand and a β-diketone ligand wherein two phosphorus atoms contained in the diphosphine dioxide ligand individually have substituents different from each other.

To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100° C. to the emission intensity at 25° C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.

To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100° C. to the emission intensity at 25° C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.

A device and method for cleaning a target may include supporting a target on a support in a chamber in a housing, the chamber optionally defined by at least one UV reflective plate; operating at least one UV emitter attached to the housing and positioned to emit UV radiation into the chamber so that the UV radiation illuminates the target; and operating an actuator to modify the UV radiation illumination of the target while the UV emitter is operated.

A luminescent replica comprising a replica of a bird of prey is described. The bird of prey can be an owl, falcon or hawk. The bird of prey can be a great horned owl. The luminescent replica can include a luminescent material on a surface of the replica. The luminescent replica can include a luminescent material on a surface representing a ventral area of the bird of prey. The luminescent material can emit light having a wavelength of from about 600 nm to about 750 nm, and optionally, from about 450 nm to about 500 nm. The luminescent material can absorb ultraviolet radiation having a wavelength of less than about 400 nm. The luminescent material may include a porphyrin or derivative of a porphyrin. A kit and method for making the luminescent replica are also described.

A wireless lighting control system is provided to create a lighting pattern by remotely controlling a plurality of lighting devices according to groups, thereby improving a lighting effect. The wireless lighting control system includes a first lighting device electrically connected with a first smart device to act as a master, and a plurality of second lighting devices electrically connected with a plurality of second smart devices to act as slaves, respectively. If a group for lighting control and control pattern information according to groups are selected from the first smart device, the first lighting device transmits the control pattern information according to the groups to the second lighting devices through a wireless communication scheme. At least one of lighting units of the second lighting devices and display units of the second smart devices is controlled based on the control pattern information according to the groups.