Abstract:
The present invention relates to a light emitting unit driving circuit and a light emitting device. The light emitting unit driving circuit provided according to embodiments of the invention includes: an operating voltage supplying unit for supplying a voltage input for the driving circuit; a driving unit coupled to the operating voltage supplying unit and configured to drive the light emitting unit to make the light emitting unit turn on or turn off; and a feedback control unit coupled between the driving unit and the light emitting unit, and forming a feedback loop together with the driving unit and the light emitting unit to stabilize an operating current of the light emitting unit.
Abstract:
The present application provides a transformer and a device including the same. The transformer includes a current suppression part, adapted to suppress a high current at a primary side of the transformer caused by a capacitor in a load network; a primary coil, adapted to receive an input voltage; and a secondary coil, adapted to provide an output voltage to the load network. Thus, the current at the primary side of the transformer is kept to be stable and a protection to the transformer is implemented.
Abstract:
The present invention relates to a light emitting unit driving circuit and a light emitting device. The light emitting unit driving circuit provided according to embodiments of the invention includes: an operating voltage supplying unit for supplying a voltage input for the driving circuit; a driving unit coupled to the operating voltage supplying unit and configured to drive the light emitting unit to make the light emitting unit turn on or turn off; and a feedback control unit coupled between the driving unit and the light emitting unit, and forming a feedback loop together with the driving unit and the light emitting unit to stabilize an operating current of the light emitting unit.
Abstract:
The invention provides an electronic product having a double-PCB sandwich structure, comprising a PCB assembly and a casing having an open side, wherein a protuberance is respectively formed on the inner sides of two side walls of the casing in the longitudinal direction, the PCB assembly consists of an electronic component, a base PCB and a main PCB, the length of the base PCB and the length of the main PCB in the longitudinal direction of the casing are substantially equal to each other and slightly smaller than the length of the casing so that the PCB assembly can be installed into the casing by mating with the protuberances.