MacPherson Kwok Chen & Heid LLP
Liquid crystal display and driving method thereof
A liquid crystal display includes a signal controller having a luminance controller receiving image data from an external graphic source and controlling the luminance of the image data such that the luminance at the gray expressed by a specific data value of the image data is established to be 80 cd/m2, and a gamma converter outputting image data each having a gamma characteristic adapted to a gamma 2.2 curve. The gamma converter output is determined without using a look up table based on at least one difference curve having a linear portion, a quartic portion, and a critical value where the liner portion and the quartic portion intersect. The liquid crystal display further includes a data driver receiving the image data for selecting and outputting gray voltages corresponding to the image data, and an inverter controlling a lamp to emit light with a luminance of 80 cd/m2 or more.
Samsung Electronics Co., Ltd.
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Doo-Sik Chang-Yeong Yun-Ju Heui-Keun Seung-Woo Jong-Seon
Park Kim Yu Choh Lee Kim