Abstract:
The present invention discloses an electric arc isolation structure for isolating an electric arc produced by an arc discharge at a transformer, and the transformer includes a primary side input electrode terminal and a secondary side high-voltage output terminal. The exterior of the transformer is covered by an insulating sheath, and the insulating sheath at least fully covers the secondary side high-voltage output terminal of the transformer.
Abstract:
A radiation fan driving apparatus aims to allow a non-stop power supply system to output electric power to drive a radiation fan to continuously rotate at a lower speed to perform heat dissipation even the power supply device is electrically connected to an external electric power source. A control circuit and isolation protective elements are provided so that when the main power source of a computer host is ON, the power supply device delivers electric power through the main power system or the control circuit to the radiation fan to rotate at high speed to provide optimal heat dissipation effect.
Abstract:
The present invention discloses a synchronous rectification control circuit, comprising at least one switch unit, a pulse width control unit, a transformer, a first rectification unit, a second rectification unit, a plurality of driving units, a logic operation unit and a signal transmission unit. The logic operation unit is used for receiving a working cycle signal generated by the pulse width control unit. When the working cycle signal is changed, the signal transmission unit transmits a switching signal for changing the working conditions of the first and second rectification units at a secondary side of the transformer, so as to switch the first and second rectification units before the switch unit operates and prevent possible short circuits or overlaps.
Abstract:
A luminous keyboard includes a cap which has a bottom lid with a first light directing zone formed thereon. The cap also has a first light blocking surface on an outer surface corresponding to the first light directing zone. At least one luminous unit is provided to provide light to the first light directing zone so that the light projects to the first light directing zone is diffused and blocked by the first light blocking surface, and finally projected to a keyboard portion to illuminate keycaps. The bottom lid replaces the light directing layer used in the conventional luminous keyboards. Thus the interior space of the keyboard can be shrunk to make fabrication and assembly of the keyboard simpler. The keyboard thus formed is thinner and lighter and suitable for mass production.
Abstract:
A control circuit and control method of electric output modes for a stacked power supply system which has a circuit board to integrate a plurality of power supply devices to output electricity. The circuit board has a control circuit to actuate the power supply devices. The control circuit provides a parallel power supply mode and a backup power supply mode, and is connected to a switch device which provides a first signal source and a second signal source corresponding to the parallel power supply mode and the backup power supply mode to enable users to select an actuation signal output from the control circuit to determine the parallel power supply mode or backup power supply mode of the power supply devices.
Abstract:
A method for driving AC of light emitting diodes includes an AC obtaining measure for obtaining an AC sine wave signal having positive and negative half-cycle waveforms; a power modulation measure for modulating the AC sine wave signal and an impedance of first and second LED groups according to at least two opposite conducting directions connected in parallel to change the positive half-cycle waveform to comply with an operation range of the positive half-cycle driving signal of the first LED group and modulate the negative half-cycle waveform to comply with an operation range of the negative half-cycle driving signal of the second LED group; and a power driving measure for driving the first and second LED groups by the positive and negative half-cycle driving signals, and the first and second LED groups are driven sequentially according to the operating cycles of the positive and negative half-cycle driving signals respectively.
Abstract:
A sideward clipping apparatus aims to clip and release an article through double-depressing actions in cyclic operations. It has a sliding member which includes an upper clipping portion and a lower clipping portion that are coupled through a first base and a second base. The lower clipping portion synchronously drives the upper clipping portion through the first base at an initial force receiving state to form a first fan moving track. The lower clipping portion is in contact with the sliding member and moved vertically to a second position under the force to drive the upper clipping portion through the second base to form a second fan moving track. Thereby the upper clipping portion and the lower clipping portion form a clipping space when the sliding member is moved to the second position to accurately clip the article.
Abstract:
A heat dissipating apparatus with stationary power supply includes power supplies having a primary power system and a stationary power system, at least one heat dissipating fan and a fan driving unit electrically connected to the stationary power system. The stationary power of the fan driving unit is used for the operation, and the stationary power system has a function of detecting the temperature during its normal output and determining whether or not to supply stationary power for the operation of the heat dissipating fan according to the temperature inside a computer casing, such that the computer casing can achieve the effect of lowering its internal temperature normally and automatically.
Abstract:
Provided is a backup power supply comprising at least one DC/DC power electrically connected to a DC power source for taking DC current therefrom prior to providing regulated DC current, at least one AC/DC power electrically connected to an AC power source for taking AC current therefrom prior to providing rectified DC current, and a power control device including a power balance unit, a power output circuit, and a detection circuit each interconnected the AC/DC power and the DC/DC power. The power control device can combine DC current from both the AC/DC power and the DC/DC power prior to providing to an electronic device (e.g., computer). The invention can continue providing electricity to the computer in the event of not only a malfunctioning of the AC/DC or DC/DC power but also a power outage of either the AC or DC power source.
Abstract:
A piezoelectric power supply includes a power supply unit to provide DC intermediate voltage power output to drive a high voltage output unit of a first load through a first piezoelectric plate and a low voltage output unit of a second load through a second piezoelectric plate. Thereby the power supply can provide a low voltage secondary power output to reduce cost and improve power output flexibility and efficiency. It can be used on display devices such as gas discharge lamps, and also provide additional low voltage secondary power for peripheral devices such as speakers, lamps, ear sets, USB connection ports and the like.