Magnachip Mixed-Signal, Ltd.

Magnachip Semiconductor, Inc.

Hyoungkyu Kim

Kyeongwoo Kim

Jusang Park

Iljun Kim

Okyeon Park

Eunkyu Seong

A display device includes: a display panel including a plurality of pixels, a driver integrated circuit (IC) configured to convert digital data corresponding to an input image to an analog data voltage using a gamma voltage, and to supply the analog data voltage to the plurality of pixels, and a power supply configured to supply a pixel driving voltage to the display panel and the driver IC, and the driver IC includes: a weight selector configured to select a weight for adjusting the gamma voltage based on an amount of change in the pixel driving voltage supplied from the power supply, and a gamma reference voltage generating circuit configured to generate a gamma reference voltage based on the selected weight.

Display device for adjusting gamma voltage and method for operating the same

A source buffer output switch control circuit for controlling operations of a source buffer output switch configured to transmit a source signal output from a source buffer to a display panel or block the source signal includes: a switch driver configured to generate a switch control signal for controlling the operations of the source buffer output switch based on a switch operation input signal; a current limiter configured to limit a driving current applied to the switch driver in order to control a slew rate of the switch control signal; and a bias block configured to supply the current limiter with a bias voltage for controlling a magnitude of the driving current.

Source buffer output switch control circuit and method of driving the same

A display driving device includes a timing controller and a charge pump configured to output a pump voltage for driving a source driver. The charge pump includes a flying capacitor; a first switch disposed between one end of the flying capacitor and a first terminal; a second switch disposed between the one end of the flying capacitor and a second terminal; a third switch disposed between another end of the flying capacitor and a third terminal; a fourth switch disposed between the another end of the flying capacitor and a fourth terminal; and a charge pump control unit configured to control turning on or off of the first to the fourth switches based on the anti-tearing signal, and control the first to the fourth switches based on the anti-tearing signal to operate in a first mode or a second mode configured to reduce power consumption than in the first mode.

Growing community of inventors

Cheongju-si, South Korea

Hyoungkyu Kim