Samsung Display Co., Ltd.

Samsung Mobile Display Co., Ltd.

Sung-Cheon Park

Wook Su Lee

Soon-Gi Kwon

Sung-Un Park

Jeong-Min Seo

Su-Yeon Yun

Won-Kyu Kwak

Kwan-Hee Lee

Choon-Yul Oh

Wook Jae Lee

Ji-Yun Son

Yoon-Young Lee

A power converter includes a voltage conversion unit that provides a first driving voltage at a first output electrode by converting a power supply voltage in response to a first control signal, the voltage conversion unit being configured to provide a second driving voltage at a second output electrode by converting the power supply voltage after a short detection period, the voltage conversion unit being configured to shut down in response to a third control signal, and a short detection unit that generates the third control signal by comparing a magnitude of a voltage of the second output electrode with a magnitude of a reference voltage during the short detection period.

Power converter, display device including power converter, system including display device, and method of driving display device

An organic light emitting display device that includes: a pixel unit that displays an image by receiving a data signal, a scan signal, a first pixel power, and a second pixel power; a regulator that receives first input voltage from the outside and boosts the received first input voltage to generate the first pixel power and inverts the received first input voltage to generate second pixel power; a driver driving unit that includes a power generator and a signal generator generating the data signal and the scan signal. Further, a switching unit that selectively connects the pixel unit with the regulator or the pixel unit with the driver driving unit; and a control unit that transmits the first pixel power and the second pixel power generated by the regulator or the driver driving unit to the pixel unit.

Organic light emitting display device and driving method for the same

Display device including power converter

A power controller includes an inductor coupled to an input terminal to which an input voltage is input, a first switch coupled between the inductor and a first power source voltage output terminal, a second switch coupled between the inductor and a ground, a switch controller controlling a voltage output to the first power source voltage output terminal by controlling duties of the first and second switches according to a feedback voltage input to a feedback terminal corresponding to a voltage output to the first power source voltage output terminal, and a diode coupled between the first power source voltage output terminal and the feedback terminal, and preventing a voltage of the first power source voltage output terminal from increasing higher than a breakdown voltage of the first and second switches.

Display device including power control device

An organic light emitting display includes a plurality of pixels coupled to scan and data lines; a scan driver configured to supply a scan signal to the pixels through the scan lines; a data driver configured to supply a data signal to the pixels through the data lines; and a power supplier configured to supply first and second voltages to the pixels and a third voltage to at least one of the scan and the data driver, wherein the power supplier includes a first converter configured to convert an input voltage into the first voltage, a second converter configured to convert the input voltage into the second voltage, a third converter configured to receive the first voltage and convert the received first voltage into the third voltage, and a shutdown switch configured to control whether or not the first voltage generated by the first converter is supplied to the pixels.

Organic light emitting display and driving method thereof

Disclosed are a direct current converter and an organic light emitting display including the converter. The converter includes a power generator configured to generate a first voltage; an output terminal connected to the power generator and configured to output the first voltage; a feedback terminal connected to an external feedback wiring and configured to input a second voltage to a selector; and the selector connected to the first power generator, and configured to transfer the first voltage or the second voltage to the first power generator.

DC-DC converter and organic light emitting display including the same

A DC-DC converter includes a voltage conversion circuit unit, a control unit, and a capacitor check unit. The voltage conversion circuit unit converts an input voltage to a first voltage. The control unit controls the voltage conversion circuit unit based on a feedback voltage and a reference voltage. The capacitor check unit determines whether a capacitor is coupled to a capacitor coupling terminal based on sensing a voltage of the capacitor coupling terminal, which is selectively coupled to the first control unit.

DC-DC converter and organic light emitting display device including the same

Power control device configured to protect internal circuits and display device including the same

There are provided a DC-DC converter and an organic light emitting display device using the same. A DC-DC converter includes a converting module and a sensing unit. The converting module includes a switching module and a control module. The switching module has a plurality of switches, and each of the plurality of switches converts an input voltage into a first voltage and outputs the first voltage while being turned on/off in response to a corresponding pulse width modulation (PWM) signal. The control module controls a switching operation of the switching module by generating the PWM signal. The sensing unit senses driving current supplied to a load to which the first voltage is provided.

DC-DC converter and organic light emitting display device using the same

Disclosed is a power supply unit including a DC-DC converter including an output terminal and resistor coupling terminal and an external resistor coupled to the resistor coupling terminal, where the DC-DC converter includes a first power generation unit which outputs a predetermined current to the output terminal, and a sensing circuit unit that includes a sensing resistor located between the first power generation unit and the output terminal and stops an operation of the first power generation unit depending on a current value flowing in the sensing resistor. A power supply unit and an organic light emitting display including the power supply unit include a sensing circuit unit that stops operation of the power supply unit to prevent an additional damage when an abnormal current occurs.

Power supply unit and organic light emitting display including the same

A DC-DC converter includes a first power source generator, the first power source generator including an input port and a first output port, the first power source generator being configured to receive an input power source to the input port, and being configured to generate a first power source, the first power source being output to the first output port, and a selecting unit, the selecting unit being configured to selectively transmit, to the first power source generator, one of: a feedback voltage, the feedback voltage being input from an external feedback wiring line via a feedback terminal, and a voltage of the first output port.

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Yongin, South Korea

Sung-Cheon Park