Samsung Display Co., Ltd.

Samsung Electronics Co., Ltd.

Yanguk Nam

Dae-Sik Lee

Jongjae Lee

Sujin Kim

Junki Hong

Yoomi Kim

Daesik Lee

Junghwan Hwang

Songyi Han

Sungchun Park

Heejeong Seo

Sanghyun Lee

Jong Jae Lee

Taegon Im

Taegon Kim

Keunoh Kang

Gwangsoo Ahn

Sunkyu Son

Hyungrae Nam

Youngil Ban

Sunkoo Kang

Kwanghun Kang

A display device includes a power managing circuit which generates a display driving voltage, a display driving circuit which receives the display driving voltage, and a display panel to display an image. The power managing circuit includes a converting circuit which converts the input voltage into the display driving voltage, and outputs the display driving voltage through an output terminal, a load sensing circuit connected to the converting circuit to sense a load current of the output terminal and which outputs a sensing result signal, a resistance dividing circuit connected to a feedback terminal to receive a feedback voltage, and which controls a level of the feedback voltage in response to a feedback control signal, and a control circuit which controls an operation of the converting circuit by providing the feedback control signal to the resistance dividing circuit based on the sensing result signal.

Display device and electronic device

A power voltage generator includes: an input voltage providing part outputting input voltage based on a first signal; an inductor receiving the input voltage to generate an inductor current and connected to an outputting part; the outputting part generating an output voltage based on the inductor current and generating a feedback voltage; an output sensing part sensing the output voltage based on a second signal and generating an output sensing voltage; a peak voltage generator generating a peak voltage based on the input voltage, set data corresponding to an output set voltage, and ripple data corresponding to a ripple set voltage; a first comparing part generating a stop signal based on the output sensing and peak voltages; a second comparing part generating a start signal based on the set data and feedback voltage; and a switch controller generating the first and second signals based on the start and stop signals.

Power voltage generator and display device having the same

A display device includes a display panel, pixels on the display panel, data and gate drivers, a timing controller which applies control signals respectively to the data and gate drivers, and a power management integrated circuit ('PMIC') which applies a driving voltage to the data and gate drivers. The timing controller detects an operational condition of the display panel and selects one of stored power setting values to output the selected one of the power setting values to the PMIC. The PMIC includes, first and second storage banks, a controller which receives the power setting value from the timing controller, stores the power setting value in one of the first and second storage banks, and calls the stored power setting value to determine the driving voltage, and a power generator which applies the driving voltage based on the driving voltage determined by the controller.

Power control circuit for display device

A display device includes a display panel including a pixel, a driving voltage generator that provides a driving voltage to a data driver, the data driver that provides a data voltage to the pixel and provides a feedback voltage, which is generated by feeding back the driving voltage within the data driver, to the driving voltage generator, and a timing controller that controls the data driver.

Display device

A voltage generator includes a single inductive element that performs a direct current-to-direct current (DC-DC) conversion on an input voltage to generate a first output voltage, a second output voltage, and a third output voltage, a gate driver which controls the single inductive element, a mode determiner which receives the input voltage, a first feedback voltage generated based on the first output voltage, and a third feedback voltage generated based on the third output voltage and outputs a mode signal, a zero-current detector which is connected to the single inductive element and outputs a zero-current signal, and a controller which receive the mode signal and the zero-current signal and outputs a control signal to the gate driver.

Voltage generator and display device including the same

A display device includes a display panel including a plurality of pixels, a data driver configured to provide a data signal to the pixels, a scan driver configured to provide a scan signal to the pixels, a power controller configured to provide a driving voltage to the data driver and the scan driver, and a timing controller configured to generate a data control signal that controls the data driver, a scan control signal that controls the scan driver, and a power control signal that controls the power controller based on an image data and a control signal. The power controller determines a transient time that changes the driving voltage from a first voltage level to a second voltage level based on the power control signal.

Display device and electronic device having the same

A power voltage generator includes a charge pump and a regulator. The charge pump generates a charge pumping voltage. The charge pumping voltage has a headroom margin which is automatically set. The charge pumping voltage is varied based on a target voltage. The regulator generates a power voltage based on the charge pumping voltage.

Power voltage generator including charge pump, display apparatus including the same and method of generating power voltage using the same

A display device includes a display panel, a display panel driving circuit, and a power management integrated circuit that generates driving voltages, receives driving set data from a timing controller, stores driving hex values corresponding to the driving set data in first internal registers, and determines voltage levels of the driving voltages based on the driving hex values. The power management integrated circuit divides the driving hex values into upper and lower decimal values, derives a result decimal value by applying the upper and lower decimal values to a first authentication-formula, generates a result hex value based on the result decimal value, compares an authentication hex value corresponding to authentication data received from the timing controller with the result hex value, and selectively operates in a normal mode or in a protection mode based on a comparison result between the authentication hex value and the result hex value.

A display device includes a display panel, a gate driving circuit including a plurality of stages, and a power supply circuit outputting a clock signal, a clock-bar signal, a first discharge voltage, and a second discharge voltage. Each of stages includes a charge part that charges a clock signal having a first high voltage to a charge node, an output part that charges the first high voltage to an output node in response to a first node voltage of the charge node and outputs a second node voltage of the output node to a gate signal, a first discharge part that discharges the second node voltage to a first discharge voltage in response to the clock-bar signal having a second high voltage, and a second discharge part that discharges the first node voltage to a second discharge voltage in response to the clock-bar signal having the second high voltage.

Gate driving circuit including a shift register and display device including the same

Systems and methods are described for preventing damage from overcurrent flows in a display device. The display device may include a display panel, a display panel driving circuit, and a driving control circuit. The display device also includes, a power management integrated circuit and a display panel protection circuit. If an overcurrent condition is detected, the display panel protection circuit may periodically mask frames from being sent to the display panel to prevent damage.

A display apparatus includes a display panel, a data driver, a power voltage generator, a driving controller and a timing compensator. The display panel displays an image based on input image data. The data driver outputs a data voltage to the display panel. The power voltage generator outputs a data power voltage to the data driver. The driving controller controls a driving timing of the data driver. The timing compensator changes an output timing of the data voltage of the data driver when a feedback data power voltage is less than a reference data power voltage at a start point of an active period.

Power voltage generating circuit compensating ripple of a data power voltage and display apparatus including the same

A display device includes: a display panel including data lines, gate lines, and pixels, the display panel is operated in an active period or in a blank period; and a driving circuit for driving the display panel, the driving circuit including: a signal controller for outputting clock control signals; a voltage generator for receiving the clock control signals, wherein the voltage generator outputs active clock signals synchronized with the clock control signals during the active period and outputs blank clock signals during the blank period; and an overcurrent detection circuit for receiving the clock control signals and the blank clock signals, the overcurrent detection circuit detects an overcurrent of the blank clock signals, and a phase difference between the clock control signals in the active period is different from a phase difference between the clock control signals in the blank period.

Display device and a method of driving a gate driver

A power voltage generating circuit includes an input capacitor including a first end connected to an input node, and a second end connected to a ground, an inductor, an input switching element connected between the input node and a first end of the inductor, a control switching element including a control electrode connected to a switching controller configured to apply a switching control signal, an input electrode connected to a resistor, and an output electrode connected to a second end of the inductor, a diode including a first electrode connected to the second end of the inductor, and a second electrode connected to an output node, and an output capacitor connected between the output node and the ground, wherein the input switching element is configured to be turned off when a short circuit of a load connected to the output node is detected in a monitoring period.

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Hwaseong-si, South Korea

Yanguk Nam