Abstract: A single-ended forward converter of the present invention, has first and second switching element comprises a pair Lus N-Channel FET, a first driving circuit comprises the series-connected circuit of the first voltage drop resistor and first zener diode for driving first Lus N-Channel FET, a second driving circuit comprises the series-connected circuit of the second voltage drop resistor and second zener diode for driving second Lus N-Channel FET.

Abstract: A full-wave rectifier of the present invention, has an input AC power source, a pair of input terminal A and B, a pair of first and second switching element Q1 and Q2 comprises a first and a second Lus P-Channel FET, a pair of third and fourth switching element Q3 and Q4 comprises a third and a fourth Lus N-Channel FET, a pair of driving element R1 and R2, a load L1 and DC voltage output terminal C and D, the major function of AC to DC conversion.

Abstract: A power source apparatus is disclosed in this invention, specifically a power source apparatus comprising a voltage amplitude control unit that employs an active power factor corrector to control the output DC voltage by applying positive or negative logic control voltage, incorporated with high frequency power source circuit and high frequency transformer, brightness of Cold Cathode Fluorescent Lamp (CCFL) or External Electrode Fluorescent Lamp (EEFL) are controllable and DC power is directly applied to DC load. Such method is accomplished by adjusting the amplitude of the supplying DC voltage for controlling the amplitude of the high frequency voltage of CCFL or EEFL, thus called Voltage Amplitude Method. Because of the characteristics of stable frequency, high resolution and linearity, VAM is broadly used in the control of luminance of discharge tubes, such as TFT-LCD TVs, LCD monitors and advertisement lamps.

Abstract: A power MOSFET diode includes a plurality of unit elements, each of which has a gate and a drain that are connected to each other by the structure and the process of UMOS, VMOS, VDMOS, and etc., so as to integrate the unit elements into a PMD without any body diode of the traditional UMOS, VMOS, or VDMOS for providing a one-way electrical conductivity. The PMD is different from traditional diodes or Schottky diodes, because a forward bias is existed when the traditional diodes or Schottky diodes conduct the electricity on one-way. However, a drain-source on-state resistance (RDS) is used to replace the consumption of the forward bias when the PMD conducts the electricity on one-way. Due to the RDS of the PMD is lower and easy to be parallel connected to each other, the PMD can be used to substantially lower the power consumption and applied to various industries.

Abstract: The present controllable synchronous rectifier employs a Lus semiconductor to set synchronous rectification action in quadrant 1 of output characteristics of the conventional power MOSFETs. By controlling the voltage level of the gate-source voltage, the drain current can be controlled in the synchronous rectifier. Further, in combination with a protect opposite circuit to transfer a sinusoidal wave power supply or pulse power supply to a direct current power output, the synchronous rectifier is an indispensable high efficiency rectifier in the industry.

Abstract: A precision voltage control circuit applicable to a PWM (Pulse Width Modulation) circuit can offer CCFL (Cold Cathode Fluorescent Lamp) or EEFL (External Electrode Fluorescent Lamp) tubes a stable high frequency voltage or current, so that each CCFL or EEFL tube can get an appropriate compensation current and an optimal emitting efficiency and enhance its emitting quality. The circuit also has an overload current, low current, and overload voltage and low voltage protective circuit to protect the CCFL or EEFL tubes from being injured. The circuit can also be applied to the TFT LCD TV or other large LCD panels, and develops the best display effect of each LCD tube.

Abstract: The Lus, Semiconductor in this invention is characterized by replacing the static shielding diode (SSD) of traditional Enhancement Mode Field Effect Transistors (EMFETs) or Depletion Mode Field Effect Transistor (DMFETs) with polarity reversed (comparing with traditional SSD) SSD, Schottky Diode, or Zener Diode, or face-to-face or back-to-back coupled Schottky Diodes, Zener Diodes, Fast Diodes, or Four Layer Devices such as DIAC and TRIAC. With the proposed Power EMFETs or DMFETs of which the drain to source resistors (Rds) are quite low, high efficiency synchronous rectification may be achieved.

Abstract: A protective and measure device for multiple cold cathode fluorescent lamps includes an electronic ballast functioning as a high-frequency power source for driving multiple cold cathode fluorescent lamps (CCFLs), primarily by parallel connecting one end of each of a plurality of CCFL to a measure element to measure the LED power source provided by the measure element's photocoupler, and concurrently serially connect the photocoupler's collect-emitter terminal, followed by employing comparators to assess the open circuit, over current, and under current among multiple cold cathode fluorescent lamps. Said electronic ballast serves to protect CCFLs, and thus contribute to the quality and protection required for large LCD monitors.

Abstract: The Lus Semiconductor in this invention is characterized by replacing the static shielding diode (SSD) of traditional Power Enhancement Mode field Effect Transistor (EMFETs) with polarity reversed (comparing with traditional SSD) SSD, Schottky Diode, or Zener Diode, or face-to-face or back-to-back coupled Schottky Diodes, Zener Diodes, Fast Diodes, or Four Layer Devices such as DIAC and Triac. With the proposed EMFETs of which the drain to source resistors (Rds) are quite low, two major functions of high efficiency synchronous rectification may be achieved.

Abstract: The Lus Semiconductor in this invention is characterized by replacing the static shielding diode (SSD) of traditional Power Metal Oxide Semiconductor Field Effect Transistors (Power MOSFETs) with polarity reversed (comparing with traditional SSD) SSD, Schottky Diode, or Zener Diode, or face-to-face or back-to-back coupled Schottky Diodes, Zener Diodes, Fast Diodes, or Four Layer Devices such as DIAC and Triac. With the proposed Power MOSFETs of which the drain to source resistors (Rds) are quite low, two major functions of high efficiency synchronous rectification may be achieved.

Abstract: The Lus Semiconductor in this invention is characterized by replacing the static shielding diode (SSD) of traditional Power Metal Oxide Semiconductor Field Effect Transistors (Power MOSFETs) with polarity reversed (comparing with traditional SSD) SSD, Schottky Diode, or Zener Diode, or face-to-face or back-to-back coupled Schottky Diodes, Zener Diodes, Fast Diodes, or Four Layer Devices such as DIAC and Triac. With the proposed Power MOSFETs of which the drain to source resistors (Rds) are quite low, two major functions of high efficiency AC/DC conversion and DC voltage regulation may be achieved.

Abstract: A power source apparatus is disclosed in this invention, specifically a power source apparatus comprising a voltage amplitude control unit that employs an active power factor corrector to control the output DC voltage by applying positive or negative logic control voltage, incorporated with high frequency power source circuit and high frequency transformer, brightness of Cold Cathode Fluorescent Lamp (CCFL) or External Electrode Fluorescent Lamp (EEFL) are controllable and DC power is directly applied to DC load. Such method is accomplished by adjusting the amplitude of the supplying DC voltage for controlling the amplitude of the high frequency voltage of CCFL or EEFL, thus called Voltage Amplitude Method. Because of the characteristics of stable frequency, high resolution and linearity, VAM is broadly used in the control of luminance of discharge tubes, such as TFT-LCD TVs, LCD monitors and advertisement lamps.

Abstract: A precision voltage control circuit applicable to a PWM (Pulse Width Modulation) circuit can offer CCFL (Cold Cathode Fluorescent Lamp) or EEFL (External Electrode Fluorescent Lamp) tubes a stable high frequency voltage or current, so that each CCFL or EEFL tube can get an appropriate compensation current and an optimal emitting efficiency and enhance its emitting quality. The circuit also has an overload current, low current, and overload voltage and low voltage protective circuit to protect the CCFL or EEFL tubes from being injured. The circuit can also be applied to the TFT LCD TV or other large LCD panels, and develops the best display effect of each LCD tube.

Abstract: A protective and measure device for multiple cold cathode fluorescent lamps includes an electronic ballast functioning as a high-frequency power source for driving multiple cold cathode fluorescent lamps (CCFLs), primarily by parallel connecting one end of each of a plurality of CCFL to a measure element to measure the LED power source provided by the measure element's photocoupler, and concurrently serially connect the photocoupler's collect-emitter terminal, followed by employing comparators to assess the open circuit, over current, and under current among multiple cold cathode fluorescent lamps. Said electronic ballast serves to protect CCFLs, and thus contribute to the quality and protection required for large LCD monitors.

Abstract: A multi-stage DC/AC coupled impact force enhancing device of an electric nailer includes an AC power source, a half-wave rectifying circuit, a doubler rectifying filter circuit, a DC steady-state circuit, an AC phase sampling circuit, a phase start circuit, a switch start circuit, an impulse oscillation circuit, a decoding counting circuit, an energy-storage circuit, a solid-state switch circuit, and an electromagnetic coil. Thus, the multi-stage DC/AC coupled impact force enhancing device can couple the alternating/direct current voltage to serially discharge the voltage to the electromagnetic coil of the electric nailer in a short period of time, thereby generating a larger impact force.

Abstract: An impact enhancing device of an electric nailer, comprising: an AC power source, a protection circuit, a first switch, a full-wave rectifier, a timing controller circuit, an energy-storage circuit, a solid-state switch circuit, an electro-magnetic coil device, a DC power source, a second switch, a reset enable single shot trigger circuit, and a relay. Thus, the electric nailer provides a larger impact force with a smaller volume and a lighter weight.

Abstract: A multi-stage impact force enhancing device of an electric nailer includes an AC power source, an AC input control circuit, a tripler rectifying filter circuit, a DC steady-state circuit, a timing switch circuit, a decoding counting circuit, an impulse oscillation circuit, multiple energy-storage circuits, multiple solid-state switch circuits, and an electromagnetic coil. Thus, the multi-stage impact force enhancing device can serially discharge a voltage to the electromagnetic coil of electric nailer in a short period of time, thereby generating a larger impact force.

Abstract: An impact enhancing device of an electric nailer, comprising: an AC power source, a protection circuit, a first switch, a full-wave rectifier, a timing controller circuit, an energy-storage circuit, a solid-state switch circuit, an electromagnetic coil device, a DC power source, a second switch, a reset enable single shot trigger circuit, and a relay. Thus, the electric nailer provides a larger impact force with a smaller volume and a lighter weight.

Abstract: The present invention relates to one or two more starters in a serial wiring on a ballast or autotransformer. An impulse high voltage is generated at the output of the ballast. Alternatively, by using a full wave bridge rectifier applied on the AC power source of the autotransformer and a group of diodes, high voltage capacitor, and a control circuit generates an inpulse high voltage at the output of the autotransformer. The invention can be used with high voltage ignition of discharge lamps and DC high voltage for industrial applications.

Abstract: An invention that is an application of U.S. Pat. No. 5,583,395. Using one Starter or two Starters or more than two Starters in serial wiring apply on a Ballast or Autotransformer; therefore, an Impulse High Voltage is generated at the output of the Ballast. Or using a full wave bridge rectifier applies on the AC Power Source of the Autotransformer and a group of Diodes, High Voltage Capacitor, and a Control Circuit applies to the output of the Ballast; therefore, an Impulse High Voltage is generated at the output of the Autotransformer. This Invention can be applications of High Voltage Ignition of Discharge Lamps and DC high voltage for Industrial applications.