The present disclosure is applicable to a display apparatus-related technical field, and relates to, for example, a rotating type display apparatus using light emitting diodes (LEDs) which are semiconductor light emitting devices. According to the present disclosure, the rotating type display apparatus using the light-emitting devices comprises: a fixed portion including a motor; a rotating unit located on the fixed portion and rotated by the motor; and a light source device coupled to the rotating unit and implementing a display by using an afterimage while rotating with the rotating unit, wherein the light source device may comprise: at least one panel radially arranged or at least one panel arranged along a cylindrical surface; a light emitting device array in which individual pixels are arranged in the lengthwise direction on each panel; and a barrier wall located on the panel on at least one side of the individual pixels.

The illumination module for emitting light (5) can operate in at least two different modes, wherein in each of the modes, the emitted light (5) has a different light distribution. The module has a mode selector (10) for selecting the mode in which the module operates, and it has an optical arrangement. The arrangement includes—a microlens array (LL1) with a multitude of transmissive or reflective microlenses (2) which are regularly arranged at a lens pitch P (P1);—an illuminating unit for illuminating the microlens array (LL1). The illuminating unit includes a first array of light sources (S1) operable to emit light of a first wavelength L1 each and having an aperture each. The apertures are located in a common emission plane which is located at a distance D (D1) from the microlens array (LL1). In a first one of the modes, for the lens pitch P, the distance D and the wavelength L1 applies P2=2.Math.L1.Math.D/N wherein N is an integer with N≥1.

The illumination module for emitting light (5) can operate in at least two different modes, wherein in each of the modes, the emitted light (5) has a different light distribution. The module has a mode selector (10) for selecting the mode in which the module operates, and it has an optical arrangement. The arrangement includes—a microlens array (LL1) with a multitude of transmissive or reflective microlenses (2) which are regularly arranged at a lens pitch P (P1);—an illuminating unit for illuminating the microlens array (LL1). The illuminating unit includes a first array of light sources (S1) operable to emit light of a first wavelength L1 each and having an aperture each. The apertures are located in a common emission plane which is located at a distance D (D1) from the microlens array (LL1). In a first one of the modes, for the lens pitch P, the distance D and the wavelength L1 applies P2=2.Math.L1.Math.D/N wherein N is an integer with N≥1.

Disclosed is an automatically adjustable shadowless operating lamp. The automatically adjustable shadowless operating lamp comprises a telescopic support rod. The telescopic support rod is rotatably connected with a first lighting assembly and a second lighting assembly with a same structure, the second lighting assembly is positioned above the first lighting assembly, and the second lighting assembly moves independently with the first lighting assembly; the first lighting assembly comprises a first adjusting part, the first adjusting part is rotationally connected with the telescopic support rod, and is hinged with an adjusting rod through an adjusting piece, a tail end of the adjusting rod is fixedly connected with a second adjusting part, and the adjusting rod is hinged with an operating lamp through the second adjusting part.

Disclosed is an automatically adjustable shadowless operating lamp. The automatically adjustable shadowless operating lamp comprises a telescopic support rod. The telescopic support rod is rotatably connected with a first lighting assembly and a second lighting assembly with a same structure, the second lighting assembly is positioned above the first lighting assembly, and the second lighting assembly moves independently with the first lighting assembly; the first lighting assembly comprises a first adjusting part, the first adjusting part is rotationally connected with the telescopic support rod, and is hinged with an adjusting rod through an adjusting piece, a tail end of the adjusting rod is fixedly connected with a second adjusting part, and the adjusting rod is hinged with an operating lamp through the second adjusting part.

A system, comprising a light source configured to emit light; and a first component including a reflective surface configured to reflect the light as a plurality of light elements that are reflected onto a second component. The reflective surface may include a plurality of mirrors. Each mirror, of the plurality of mirrors, may be configured to reflect a portion of the light as a respective light element of the plurality of light elements. A first light element, of the plurality of light elements, may be reflected onto a first location of the surface. A second light element, of the plurality of light elements, may be reflected onto a second location, of the surface, that is different than the first location.

A system, comprising a light source configured to emit light; and a first component including a reflective surface configured to reflect the light as a plurality of light elements that are reflected onto a second component. The reflective surface may include a plurality of mirrors. Each mirror, of the plurality of mirrors, may be configured to reflect a portion of the light as a respective light element of the plurality of light elements. A first light element, of the plurality of light elements, may be reflected onto a first location of the surface. A second light element, of the plurality of light elements, may be reflected onto a second location, of the surface, that is different than the first location.

An angle-adjustable lamp comprises a lamp body, a plurality of heat sinks, a plurality of connecting rods, and a plurality of light-transmitting covers. The plurality of heat sinks are rotatably connected to a side wall of the lamp body respectively through the plurality of connecting rods. The plurality of heat sinks are rotationally symmetrically disposed around a longitudinal center axis of the lamp body. Each of the plurality of light-transmitting covers is disposed on a side of a corresponding one of the plurality of heat sinks facing away from the lamp body. When the plurality of heat sinks are rotated around the plurality of connecting rods, an angle between each of the plurality of light-transmitting covers and the lamp body is correspondingly changed, so that a light exit angle of light transmitted through each of the plurality of light-transmitting covers is correspondingly changed.

A sweeping illumination system illuminates an aquarium with organisms requiring simulated sunlight for survival. The illumination system includes a downward-facing light housing for illuminating a top surface of the aquarium. A support arm is coupled to the light housing and enables the light housing to sweep a pattern across the top surface of the aquarium. The sweep pattern can be semi-circular or semi-elliptical along a plane parallel to the top surface of the aquarium.

A sweeping illumination system illuminates an aquarium with organisms requiring simulated sunlight for survival. The illumination system includes a downward-facing light housing for illuminating a top surface of the aquarium. A support arm is coupled to the light housing and enables the light housing to sweep a pattern across the top surface of the aquarium. The sweep pattern can be semi-circular or semi-elliptical along a plane parallel to the top surface of the aquarium.