Disclosed is a starry sky lamp with good heat dissipation effect. The lamp includes a shell, and a laser and a circuit board arranged in the shell, where the laser is electrically connected with the circuit board, and further includes a light-transmitting cover and a heat dissipation fan, where the heat dissipation fan is arranged in the shell, and the heat dissipation fan is electrically connected with the circuit board and blows air towards the laser; and the shell is provided with an opening, the light-transmitting cover is installed at the opening, the light-transmitting cover is a semi-circular hollow structure, and a starry sky effect pattern cutting surface is arranged inside the light-transmitting cover.

An electrical supply system including: an extension module including a composite board having an anode layer and a cathode layer of an electrically conducting material, which anode layer and cathode layer are separated by an insulator of an electrically insulating material, the anode layer and the cathode layer each having a trench extending from a connection surface of the composite board and including a connection element, connector pins for the trenches of the extension module, each connector pin having a first complementary connection element for engaging the connection element of the trench of the composite board of a further extension module and a second complementary connection element for engaging the connection element of the trench of the composite board of the extension module, and a power supply capable of providing a constant voltage or a constant current between the anode layer and the cathode layer.

The invention relates to an intelligent variable frequency laser rain, including a back cover, a gluey shell, a radiator and a front cover. A button back cover is arranged at the right end of a button. The button back cover is connected with a master control board. The back cover and the gluey shell are fixedly connected through a plurality of screws. A rubber plug is arranged on the screws. A laser beam is reflected through the lenses and projected onto the grating to form a plurality of laser beams. The stepping motor drives the plastic mirror wheel to rotate so that the laser beams move from top to bottom. When the laser beam reaches the bottom, the laser beam is projected onto the next lens to start the process of the next laser beam from top to bottom, thereby finally realizing a unique visual effect of laser raining.

A lighting module has an LED (44), a lens (45) over the LED to produce a beam-shaped output from the LED and a collimator (50) arranged to partially collimate the beam-shaped out-put. Blue light is provided at large angles to the normal, for example using a filter arrangement (54, 56) over the collimator which is adapted to filter light from the collimator at relatively large angles to the normal. The filter arrangement does not filter light from the collimator at relatively small angles to the normal. Thus, the module provides white task light in a normal direction and blue ambient light at steep angles. The overall system can be compact and light efficient.

In an example, a fastener for coupling a light-emitting device to a composite panel assembly is described. The fastener includes a fastener head including an anchor portion and a retainer portion. The fastener also includes a plug extending from the anchor portion of the fastener head. The plug includes an axial retention structure configured to axially retain the plug in a bore of a composite panel assembly. The retainer portion extends as a cantilever structure from the anchor portion. The retainer portion is configured to press a light-emitting device toward a light-transmission channel of the composite panel assembly when the plug is axially inserted in the bore of the composite panel assembly.

Provided is a projection device and projection system that includes a first light source which emits a first light beam, a diffraction part on which first predetermined pattern is provided, and the diffraction part diffracts at least a part of the first light beam emitted from the first light source to form first pattern corresponding to the first predetermined pattern, and a reflection part on which one or more second predetermined patterns are provided, the reflection part reflects a second light beam incident thereon to form second pattern corresponding to the one or more second predetermined patterns, and one of the first pattern and the second pattern forms projection pattern or both of the first pattern and the second pattern are superposed to form projection pattern.

Disclosed are a projection device for generating a meteor lighting effect and a projection lamp for generating a meteor lighting effect, wherein the projection device for generating the meteor lighting effect comprises: a first incoherent light source, wherein the first incoherent light source has an irradiation surface; a first optical path plate, wherein the first optical path plate partially covers the irradiation surface of the first incoherent light source; a second optical path plate, wherein the second optical path plate is arranged on one side that is of the first optical path plate and that is far away from the first incoherent light source; and a driving assembly, wherein the driving assembly is in driving connection with the first optical path plate to drive the first optical path plate to rotate.

A control device controls an illumination device that illuminates a surrounding area, and an effect-producing device that emits light producing an effect on the surrounding area. The control device includes a control unit that controls at least one of a color of first light emitted by the illumination device and a color of second light emitted by the effect-producing device so that at least one of the color of the first light and the color of the second light moves into a specified chromaticity range, the color of the first light and the color of the second light being outside of the specified chromaticity range. Colors in the specified chromaticity range are recognized as a same color by a human.

An electrical supply module including: a composite board including an anode layer and a cathode layer of electrically conducting material, which anode layer and cathode layer are separated by an insulator of electrically insulating material, the anode layer and the cathode layer each having a trench extending from a connection surface of the composite board; an adapter for mounting in a hole extending entirely through or partly through the composite board, the adapter including a circuit board carrying an electronic component, the circuit board establishing electrical connection from the anode layer to an anode of the electronic component and electrical connection from the cathode layer to a cathode of the electronic component; and a power supply capable of providing a constant voltage or a constant current between the anode layer and the cathode layer. An electrical supply system including the electrical supply module and an extension module.

A children's toy, and electronic device, plays audio files and projects differently-colored light patterns onto a surface in a room in which the device is placed. The light patterns are projected in synchronization with the playback of such audio files. The device allows users to select from different nature sounds, different melodies, or multiple pre-recorded children's stories. The device also enables users to record their own stories for each of several environments, and playback their custom stories together with projections of light in each environment.