摘要:
The present invention relates to a switching operation control device of a power switch, an LED light emitting device including the same, and a control method thereof. The control device detects a zero crossing time when a voltage at an input end of the power switch becomes a zero voltage, generates a reference signal that is synchronized with the voltage at the input end of the power switch by using the detected zero crossing time, and compensates the generated reference signal with a first voltage that is greater than the zero voltage during a blocking period corresponding to the zero crossing time.
摘要:
The present invention relates a pulse width filter generating a modulation signal that is increased in synchronization with one of an increasing edge and a decreasing edge of the input signal and is decreased in synchronization with the other of the increasing edge and the decreasing edge, and transmitting the input signal of the modulation signal. The input signal passed through the filter unit is inverted thereby being an output signal. The pulse width filter controls the increasing and the decreasing of the modulation signal according to the output signal and the input signal passed through the filter unit, and the modulation signal is a signal to determined whether the pulse width of the input signal is more than the predetermined cut-off pulse width.
摘要:
A resonant inverter includes a first driver and a second driver for driving a first and second switching devices, respectively, a dead time generator for generating a first drive signal and a second drive signal respectively, a current-controlled oscillator for supplying, to the dead time generator, an output clock having a frequency determined based on a first current input to the current-controlled oscillator, and a current mirror for supplying the first current to the current-controlled oscillator in an amount proportional to a second current flowing through an external resistor. The current mirror includes a track/hold circuit, to supply the second current in an amount equal to an amount of the second current supplied before a variation in the amount of the second current, during a transition of an output signal between the first and second switching devices.
摘要:
A method of manufacturing a nonvolatile memory device includes forming a plurality of device isolation regions in a semiconductor substrate, forming a tunneling insulation layer on the semiconductor substrate, forming a first preliminary polysilicon layer in communication with the tunneling insulation layer and the device isolation regions, forming a preliminary amorphous silicon layer on the first preliminary silicon layer, forming a second preliminary polysilicon layer on the preliminary amorphous silicon layer, and patterning the second preliminary polysilicon layer, the preliminary amorphous silicon layer, and the first preliminary polysilicon layer to form a floating gate layer.
摘要:
A logic circuit for high-side gate driver includes a p-MOSFET array connected to a first voltage source, an n-MOSFET array connected to a second voltage source, and a resistor arranged between the p-MOSFET array and the n-MOSFET array, wherein a first node between the resistor and at least one of the p-MOSFETs in the p-MOSFET array is connected to a first output terminal, and a second node between the resistor and at least one of the n-MOSFETs in the n-MOSFET array is connected to a second output terminal. An additional logic circuit can include a second p-MOSFET array, a second n-MOSFET array, and a second resistor between the second p-MOSFET array and the second n-MOSFET array, where an output signal from an output terminal between the first resistor and the first n-MOSFET array is fed back to the second p-MOSFET array and the second n-MOSFET array, and an output signal from an output terminal between the second resistor and the second n-MOSFET array is fed back to the first p-MOSFET array and the first n-MOSFET array.
摘要:
A clock driver is provided. A first driving unit is configured with a plurality of drivers and receives a first clock signal to drive a first pumping clock. A second driving unit is configured with a plurality of drivers and receives a second clock signal to drive a second pumping clock. A charge recycling switch is connected between an output terminal of the first driving unit and an output terminal of the second driving unit. A switch controller selectively transfers an input clock signal of the first or second driving unit to the charge recycling switch in response to the first and second pumping clock signals.
摘要:
A reduced power thin-film transistor (TFT) array substrate includes a display section, a peripheral section, a driving circuit section and a driver chip. The display section includes a high definition section and a low definition section. The peripheral section surrounds the display section. The driving circuit section is formed on the peripheral section and is configured to provide the high definition section with a plurality of first gate signals. The driver chip is mounted on the peripheral section to provide the low definition section with a plurality of second gate signals.
摘要:
A display device which has a simplified assembly process and minimized product damage. The display device includes a display panel; a chassis base having a first surface for supporting and for fixing the display panel thereto; a circuit board fixed to a second surface of the chassis base, the circuit board having circuit elements for driving the display panel; and at least one main fastening unit for fixing the circuit board to the chassis base such that a gap is formed between the circuit board and the chassis base. The main fastening unit includes a main body, fasteners, and first and second protrusions to form engaged portions. The display device may be a plasma display device.
摘要:
A transconductance control circuit of a rail-to-rail differential input stage is described. The transconductance control circuit senses the gate-source voltages of PMOS and NMOS differential pairs, converts the sensed voltage to a current, compares the current with a reference current, and controls the currents of the PMOS and NMOS differential pairs to control the transconductance of the RTR differential input stage. Also, various types of biasing techniques and matching techniques are used to reduce the variations of the transconductance.
摘要:
In a driving unit and a display apparatus, a master driving chip includes a common voltage generator configured to receive power and generate a master common voltage and a slave common voltage and a first data driver configured to output a master image signal based on the master common voltage and a master data signal. A slave driving chip includes a second data driver configured to output a slave image signal based on the slave common voltage from the common voltage generator and a slave data signal. Accordingly, the malfunction of the driving unit and the display apparatus may be prevented.