Samsung Display Devices Co., Ltd.

Choon-yul Oh

Sun-jung Choi

Cheol-woo Park

Sun-jeong Choi

Min-seok Kim

In a method for driving a matrix liquid crystal display (LCD), whereby the selection ratio of a scanning electrode is improved and the voltage magnitude variation is considerably reduced, the scanning electrode driving signals are made to overlap each other according to an orthogonal function to then be sequentially applied to adjacent scanning electrodes. The data electrode driving signals are made to change in their voltage level through the step of maintaining an intermediate voltage level in the overlap interval to then be applied to data electrodes in the alternative, or the scanning electrode driving signals having opposite polarity are periodically applied to adjacent scanning electrodes. Therefore, the selection ratio of scanning electrodes are improved and the generation of the waveform differential is minimized, thereby reducing the crosstalk generated in a picture.

Method for driving a liquid crystal display

A gray scale display driving method of a matrix liquid crystal display (LCD) and a display driver implementing this method, can reduce the scanning and data electrode driving signal voltages and the driving voltage magnitude variation for the respective sub-frames and can improve the picture quality. The method includes the steps of determining an n-bit error-diffused value of N-bit picture data, where n is smaller than N, converting the N-bit picture data into an M-bit code, where M is larger than or equal to N, error-diffusing n-bits of the converted picture data, and displaying picture data of M-n bits, with n bits being error-diffused, as a picture by a gray display method.

Gray scale display driving method of a matrix liquid crystal display and

An apparatus and method for driving a multi-level gray scale display are provided. The apparatus displays multi-level gray scale without an analog driving IC and includes a row function generator for generating a row function, a column signal operator for receiving and operating the row function and display data to output a column data, a standard voltage selection signal generator for receiving a clock to generate a standard voltage selection signal, a column signal generator for generating a plurality of levels of column standard voltages and dividing the column standard voltage selected according to the standard voltage selection signal to generate a plurality of levels of column voltage so as to drive the column electrode according to the column data, and a row signal generator for generating a plurality of row standard voltages and dividing the row standard voltage selected according to the standard voltage selection signal to generate a plurality of levels of row voltage so as to drive the row electrode according to the row function.

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Anyang, South Korea

Choon-yul Oh