Samsung Display Co., Ltd.

Su Hyeong Park

Ho Yong Jung

Cheol Woo Park

Bong Hyun You

Eun Ho Lee

Jung Taek Kim

Joon Chul Goh

Ung Gyu Min

Ji Myoung Seo

Hoe Seok Na

Jun Woo Hong

Ji Woong Jeong

A data driver includes shift registers, sampling latches, holding latches, and a data sensing unit. The shift registers generate sampling pulses by shifting a source start pulse in response to a source sampling clock. Each of the sampling latches receives current data and stores the current data in response to each of the sampling pulses. Each of the holding latches receives the current data stored in each of the sampling latches, and stores the received current data in response to a source output enable signal. The data sensing unit receives the current data corresponding to an i-th sampling latch of the sampling latches or an i-th holding latch of the holding latches (i is a positive integer) and previous data stored in the i-th sampling latch or the i-th holding latch, compares the current data with the previous data, and generates control data based on the comparison result.

Data driver and method of driving the data driver

There is provided a scan driver including a plurality of stages coupled to respective scan lines, wherein a kth (where k is a natural number) stage of the plurality of stages includes: a first driver configured to supply a kth scan signal to a first output terminal, based on a first clock signal, and a second driver configured to supply a kth carry signal not overlapping the kth scan signal to a second output terminal, based on an inverse first clock signal.

Scan driver and display device using the same

There is provided a pixel including an organic light emitting diode (OLED), a first transistor having a first electrode connected to a first power source and configured to control an amount of current supplied from the first power source to the OLED in response to a data signal, a second transistor and a third transistor connected between a second electrode and a gate electrode of the first transistor, and a fourth transistor connected between an initializing power source and a first node that is a common node of the second transistor and the third transistor.

Pixel and organic light emitting display device using the same

A liquid crystal display includes a liquid crystal panel which includes a plurality of pixels and a plurality of data lines connected to the plurality of pixels and a data driver which applies data voltages having different polarities to adjacent data lines among the plurality of data lines and performs a first charge sharing to short the data lines having the different polarities and a second charge sharing to short the data lines having the same polarity, wherein the voltage of at least one of the data lines is step-wisely changed by the second charge sharing.

Liquid crystal display and a driving method thereof

A liquid crystal display includes: a display panel; a signal controller configured to receive an input image signal and an input control signal, output an output image signal and an output control signal, and determine a charge sharing between two or more data lines having voltages in the same polarity; and a data driver configured to convert, based on the output control signal, the image signal into data voltages to be supplied to the data lines connected to the pixels, the data voltages having positive levels and negative levels. The data driver is further configured to perform a first charge sharing by short-circuiting first and second data lines that are adjacent to each other, and a second charge sharing by short-circuiting third and fourth data lines having data voltages in the same polarity, wherein the first charge sharing and the second charge sharing may not temporally overlap with each other.

Liquid crystal display and driving method thereof

A display device includes a display panel including a plurality of scan lines, a plurality of data lines which crosses the plurality of scan lines, and a plurality of pixels that is connected to the plurality of scan lines and the plurality of data lines, a scan driving unit which provides a plurality of scan signals, each of which includes a scan-on signal and a scan-off signal, to the plurality of scan lines, a data driving unit that provides data voltages to the plurality of data lines, and a timing control unit that determines an order in which the scan signals are provided to the plurality of scan lines, where the scan-on signal is provided to each of the plurality of scan lines based on an order of averages of the data voltages transferred to the pixels connected thereto.

Growing community of inventors

Gyeongju-si, South Korea

Su Hyeong Park