Abstract: A power factor improvement circuit includes a low frequency filter unit installed between two electrodes of an output terminal of a rectifier unit for adjusting voltage and current inputted to a PWM control IC in-phase, and first and second compensation circuits installed at a current compensation terminal and a voltage compensation terminal of the PWM control IC respectively, and the first and second compensation circuits are provided for reducing the current gain of the phase adjustment unit to avoid any unnecessary action of the PWM control IC, so as to achieve the effect of controlling a power factor to a level over 0.90 when a full voltage of 90-264V is inputted.

Abstract: The invention is directed to a structure of positioning a cover of a miniature fuse device, characterized in that locking bumps are set at two sides of the body of the miniature fuse device and locking holes are set at two sides of the cover. When the body is received in the cover, the locking bumps of the body fix with the locking holes at the cover such that the cover can firmly join the body. Accordingly, the cover can be prevented from falling off due to improper external forces when the miniature fuse device is being transferred or stored.

Abstract: A phase comparator is connected between a rectifier and an oscillator in the primary side of the transformer of lighting equipment. The phase comparator obtains rectifier's frequency multiplication signal of pulse DC signal as a reference phase and a phase synchronization signal of a phase angle ? of the AC power signal then transmits to the control of the oscillator, and synchronizes the oscillation frequency of the oscillator and phase synchronization signal with the phase angle ? of rectifier, to avoid flickering of phase adjustment of AC power by TRAIC.

Abstract: A power factor improvement circuit includes a low frequency filter unit installed between two electrodes of an output terminal of a rectifier unit for adjusting voltage and current inputted to a PWM control IC in-phase, and first and second compensation circuits installed at a current compensation terminal and a voltage compensation terminal of the PWM control IC respectively, and the first and second compensation circuits are provided for reducing the current gain of the phase adjustment unit to avoid any unnecessary action of the PWM control IC, so as to achieve the effect of controlling a power factor to a level over 0.90 when a full voltage of 90-264V is inputted.

Abstract: An active type multiple channeled LED power driving system which includes seven regions, wherein power is lead-in through the first region with the EMC circuitry and the PWM circuitry, passing through the second region with the transformer, entering the third region with the CC & CV control circuitry, passing through the fourth region with two multiple channeled outputers, lead-in the fifth region having two intermittent modulating circuitries, outputting to the sixth region with the two LED lighting modules, and setting with environment parameters sensors in the seventh region, thereby raising the electronic typed heat dissipation rate and energy efficiency under the system operation to let the LED lamp be able to achieve its maximum performance.

Abstract: An overload protection combination structure for a base of a fuse is provided, which is mainly directed to an improved technology of an auxiliary structure for ensuring cutoff of an overload current of the fuse base after the fuse is microminiaturized. The improvement is characterized in that, one or more recesses are formed between two leading pins of a body of the fuse base after being reduced in size, thereby increasing a creeping distance between the two leading pins for holding fuse wires, so that the microminiaturized fuse can comply with requirements of an electronic safety standard.

Abstract: The present invention is to provide an active type multiple channeled LED power driving system, which is an operation system of driving power mainly designed for light source equipment using high power LED. The best system composition includes seven operation regions. The ordinary power is lead-in through a first region, and at first the regulating and filtering are proceeded by an EMC circuitry. Then, after it is lead-in a PWM circuitry to raise its power, the voltage transformation is processed through the second region. After it is further regulated and filtered to form the optimum power through the CC&CV control circuitry in the third region, it proceeds multiple channeled splitting by the fourth region. And, the original DC (direct current) power output is modulated into the intermittent electric power capable of controlling the output frequency and width of period by intermittent modulating circuitry in the fifth region.