Samsung Electronics Co., Ltd.

Jin-hyung Lee

Sung-yong Joo

Gil-yong Chang

Won-myung Woo

Kyoung-geun Lee

Se-ra Lee

Sung-Bum Jung

Youn-seung Lee

Yong-Joo Lee

Moon-young Kim

Seung-myen Lee

Su-yong Hwang

A display apparatus is provided. The display apparatus includes a display configured to display an image, an image signal provider circuit configured to provide an image signal to the display, and a power supply configured to generate driving power and to supply the generated driving power to the image signal provider, wherein the power supply controls an operation time of a power factor compensation (PFC) circuit which performs power factor compensation of the display apparatus based on a size of an output load receiving the driving voltage.

Display apparatus having power supply device with power factor compensation and power supply method thereof

A display apparatus is disclosed. The display apparatus may include a display configured to display an image using a backlight, an image signal provider configured to provide an image signal to the display and a power supply unit configured to generate first driving power and second driving power using a first converter and a second converter, respectively, and provide the first driving power to the image signal provider and provide the second driving power to the backlight, wherein the power supply unit is configured to control the first converter and the second converter alternately.

Power supply device, display apparatus having the same and method for power supply

An electromagnetic induction device, and a power supply apparatus and a display apparatus having the same are disclosed, the electromagnetic induction device comprising: a substrate layer comprising at least one substrate configured to be laid one upon another and a thin-film coil pattern, which is formed on at least one of both surfaces of the substrate and through which an electric current of a signal flows, the at least one substrate having an opening provided at an inner area of the thin-film coil pattern; a core configured to have a shape corresponding to a circulation path of magnetic flux generated by change in an electric current flowing in the thin-film coil pattern, and arranged to penetrate the inner area of the thin-film coil pattern through the opening of the substrate layer; and a heat dissipation layer disposed on one surface of the substrate, the heat dissipation layer configured to dissipate heat from at least one of the substrate layer and the core. The disclosed configuration addresses the problem of heat dissipation in a thin flat-plate structure.

Electromagnetic induction device, and power supply apparatus and display apparatus having the same

A power supply apparatus and a method for controlling the power supply apparatus are provided. The power supply apparatus drives an electronic apparatus which may operate in a first mode or a second mode. The power supply includes an input voltage generator that generates an input voltage; an output voltage generator that generates a first output voltage by using the input voltage, and supplies the output voltage to the electronic apparatus; and a detector that determines the mode of the electronic apparatus by detecting a load of the electronic apparatus, and outputs a control signal to the output voltage generator in response to the mode of the electronic apparatus changing from the first mode to the second mode. In response to receiving the control signal, the output voltage generator generates a second output voltage that corresponds to the second mode.

Power supply apparatus and power supply method thereof

Disclosed are a two-stage noise filter, in which two filters are integrated, and an electronic device including the same. The two-stage noise filter includes a core configured to include a primary side and a secondary side opposite to the primary side; a first filter configured to include a first coil wound on the primary side of the core and a second coil wound on the secondary side of the core; a second filter configured to include a third coil wound on the primary side of the core in series with the first coil and a fourth coil wound on the secondary side of the core in series with the second coil; and an impedance balancer configured to keep a balance of impedance between the first and second filters.

Two-stage noise filter and electronic device including the same

A light emitting diode driver (LED) circuit and method are provided. The light emitting diode driver circuit includes an LED array; a LED driving circuit configured to supply current to the LED array through switching operations of a plurality of switches; and a driving controller configured to control the plurality of switches to supply current, corresponding to a dimming signal, to the LED array using a clock signal of a preset frequency. The driving controller may be further configured to control the plurality of switches to alternately perform switching operations.

Light emitting diode driver circuit, display apparatus including the same, and method for driving light emitting diode

A control circuit is provided. The control circuit includes a load switch, and a controller configured to transfer a turn-on signal which is increased step by step to the load switch, and perform a soft start operation which turns on the load switch. In response to the load switch being turned on, the control circuit restricts an inrush current flowing in the load switch.

Control circuit including load switch, electronic apparatus including the load switch, and control method thereof

A display apparatus, a power supply and a power supply method are disclosed. A power supply for a display apparatus includes a switching driver configured to perform a switching operation and output an operation voltage; a first charger/discharger configured to set timing of the switching operation; and a controller configured to control the switching driver to disable the switching operation until a voltage previously charged in the first charger/discharger is discharged up to a first voltage, when the display apparatus is in a power saving mode.

Display apparatus, power supply and power supply method thereof

A power supply configured to include a switch which performs a switching operation in accordance with a preset period in a standby mode, a transformer which supplies voltage from a primary side to a secondary side in response to the switching operation of the switch, and a constant-voltage controller which controls voltage supplied to the system by regulating the voltage at the secondary side of the transformer, the constant-voltage controller including a blocking diode which shuts off current flowing from an output of the power supply to the constant-voltage controller in an off-section of the switch. Thus, the power consumption is decreased in the off-section, thereby having an effect on reducing the standby power.

Electronic apparatus, power supply and power control method thereof

A noise filter and an electronic device including the same are disclosed. The noise filter is configured to suppress noise generated in a power line or a ground line of a power circuit unit provided in an electronic device. The electronic device including: at least one coil connected to the power line and the ground line; and a core around which the coil is wound, a common core portion configured to suppress common mode noise generated at the ground line and a normal core portion configured to suppress normal mode noise generated at the power line are formed as a single body. Thus, the common mode noise filter and the normal mode noise filter are integrated with each other to thereby improve productivity and reduce production costs.

Noise filter and electronic device with integrated common mode and normal mode noise filters

Provided are a display system including a plurality of display apparatuses and a control method of the same. The display system including a plurality of display apparatuses comprises a first display apparatus configured to display an image to constitute a multi-screen, and receive power from a single power source; and a second display apparatus configured to display an image to constitute the multi-screen, and receive power from the single power source, wherein the second display apparatus starts operation after the first display apparatus enters a normal driving state.

Display system and control method of the same

A power inlet socket coupled to a power delivering member of an electronic device to supply power from an external power plug to the electronic device includes a socket body comprising a power plug connector connected to the external power plug and a power delivering member connector connected to the power delivering member; three terminal pins, each terminal pin comprises a projecting pin extending from the power plug connector in parallel with one another to correspond to a terminal of the external power plug and a connection terminal exposed to the power delivering member connector; and an insulating barrier provided between at least a pair of connection terminals of the three terminal pins to cut off an electric current flowing among the connection terminals. Thus, the insulating distance of power inlet socket is improved.

Power inlet socket for providing power to electronic device

A semiconductor device is provided. The semiconductor device may include a frame portion on which at least one semiconductor chip is arranged; a plurality of leads electrically connected to the semiconductor chip; and a mold portion formed on the frame portion to surround a part of the frame portion on which the semiconductor chip and the plurality of leads are arranged, wherein a gap between closest portions of the respective leads is at least 2.9 mm.

Semiconductor device

A display apparatus including: a display; a driver including an amplifier configured to detect a current of the display and to generate a constant current control signal, and a transistor configured to adjust the current supplied to the display in accordance an output voltage of the amplifier; and a controller configured to monitor the current of the display and a dropout voltage of the transistor, and control the amplifier so that a pulse width modulation (PWM) duty ratio is decreased in response to the dropout voltage being equal to or higher than a reference voltage.

Light source driving apparatus for controlling the operating mode of a backlight in response to changes in the dropout voltage of the current control transistor

A power supply and method of controlling power supplied to a light source are disclosed. The power supply includes a dimming-control voltage generator configured to generate a dimming-control voltage based on first and second adjustment values; a dimming controller configured to output a dimming control signal for controlling analog dimming and pulse width modulation (PWM) dimming of a light source based on the dimming-control voltage; and a driver configured to control the analog dimming and the PWM dimming of the light source based on the dimming control signal.

Growing community of inventors

Anyang-si, South Korea

Jin-hyung Lee