Lg Display Co., Ltd.

Juno Hur

Dongju Kim

Hoon Jang

Soondong Cho

Jongwoo Kim

Minki Kim

Soon Dong Cho

Soon-Dong Cho

Wonyong Jang

Jungjae Kim

Dong Ju Kim

Won-Yong Jang

Seungpyo Seo

Dong-Ju Kim

Minsik Son

Seungho Jang

Inho Yeo

Hoonseok Jang

A touch display device operates between a normal mode and a sleep mode, the touch display device including: a display panel; a touch panel; a data drive circuit to supply a data voltage; a touch drive circuit to supply a touch driving signal; a timing controller to supply a data control signal; a micro-control unit to supply a touch synchronization signal; and a power supply to supply a first and second driving voltage, the power supply including: a first converter to output the first driving voltage; a second converter to output the second driving voltage; a first switching unit to supply the first or second input voltage to the first converter; a second switching unit to supply the first or second input voltage to the second converter; and a switching control circuit to control the first and second switching units. Therefore, power consumption of the power supply is reduced.

Power supply and touch display device including the same

Disclosed is a display device including: a display panel; a timing controller generating image data corresponding to an input image, and generating and outputting a first start signal, an on clock, and an off clock; a level shifter generating a second start signal in synchronization with the first start signal, generating gate clocks that swing to a predetermined voltage and have multiple phases, by using the on clock and the off clock, and outputting the generated gate clocks; a shift register including multiple stages connected to gate lines of the display panel, respectively, and outputting a scan signal sequentially to the gate lines by using the second start signal and the gate clocks; and a data driving circuit supplying a data voltage corresponding to the image data to data lines of the display panel in synchronization with the scan signal.

Display device

The present disclosure relates to a level shifter and a display device using the same, and the level shifter includes a first transistor configured to increase a voltage of an output signal, a second transistor configured to lower a voltage of the output signal, a first driver configured to vary a gate voltage of the first transistor in response to a first Vgs signal being varied within a transition time of the output signal, and a second driver configured to vary a gate voltage of the second transistor in response to a second Vgs signal being varied within a transition time of the output signal.

Level shifter and display device using the same

A scan driver comprises a level shifter configured to output varied clock signals that have different frequencies for at least two consecutive periods; and a shift register operating based on the varied clock signals output from the level shifter and outputting scan signals.

Scan driver and display device using the same

A display device and a method of driving the same are provided. The display device includes a control signal generator that generates a control signal, a first demultiplexer that time-divides a data voltage from a first channel of a data driver and distributes the data voltage from the first channel to two or more data lines, in response to the control signal, a signal delay part that delays the control signal, and a second demultiplexer that time-divides a data voltage from a second channel of the data driver and distributes the data voltage from the second channel to other two or more data lines, in response to the control signal delayed by the signal delay part.

Display device and method of driving the same

Provided is a display device including a level shifter generating an output clock swinging between a first voltage and a third voltage during a display period and swinging between a second voltage and the third voltage during a touch sensing period. Waveform distortion of a no-load alternating current (AC) signal may be prevented without eliminating a stabilizing capacitor of the level shifter, and thus, sensing sensitivity may be increased by reducing noise of a touch sensor signal.

Display device including touch sensor

Disclosed are a touch power circuit and a touch display device in which an operational amplifier buffers an input pulse having a first voltage and a higher second voltage alternate, and uses the buffered input pulse to provide an output pulse. The operational amplifier includes a non-inverting input terminal to which the input pulse is supplied, an inverting input terminal connected to the output terminal, and an output unit driven according to a result of amplifying a difference between a voltage of the non-inverting input terminal and a voltage of the inverting input terminal and configured to charge and discharge the output terminal. The circuits and devices may further include an offset voltage applier configured to supply an offset voltage having a first polarity to the non-inverting input terminal and/or the inverting input terminal to level-shift the input pulse.

Touch power circuit having operational amplifier and touch display device using the same

A liquid crystal display device includes a liquid crystal panel configured to display an image, a driver configured to drive the liquid crystal panel, a timing controller configured to control the driver, and a power supply configured to be supplied by an input voltage, supply a common voltage to the liquid crystal panel, and temporarily vary a compensation ratio of the common voltage when a pattern causing a drop of the input voltage is displayed by the display device.

Liquid crystal display and common voltage compensation driving method thereof

A liquid crystal display is disclosed. The liquid crystal display includes a power module, which senses an input voltage and outputs a mode conversion signal when the input voltage is equal to or less than a reference voltage, and a timing controller which changes a driving mode of a source driver integrated circuit (IC) in response to receiving the mode conversion signal from the power module.

Liquid crystal display and method for driving the same

A liquid crystal display is disclosed. The liquid crystal display includes a clock generator generating a first input clock signal and then a second input clock signal; a level shifter shifting the first and second input clock signals and generating clock signals whose voltages decrease stepwise from a gate high voltage, to a modulation voltage that is lower than the gate high voltage, to a gate low voltage that is lower than the modulation voltage; and a liquid crystal panel that includes data lines, gate lines intersecting the data lines, TFTs provided at intersections of the data lines and the gate lines, and a gate shift register sequentially supplying a gate pulse to the gate lines in response to the clock signals input from the level shifter.

Growing community of inventors

Paju-si, South Korea

Juno Hur