POSITION SENSTIVE LIQUID DISPLAY DEVICE

摘要

A position sensitive LCD(Liquid Crystal Display) is provided to perform a touch screen function only using the existing LCD panel without having an additional touch panel so as to reduce the manufacturing cost. A position sensitive LCD(100) includes an LCD panel(110), a first pulse converter(150), a second pulse converter(160) and a detector. The position sensitive LCD further includes an electronic pen(170) for applying a touch signal to a specific point of the LCD panel. The touch signal is an electromagnetic signal. The LCD panel receives a plurality of gate signals and a plurality of data signals from panel drivers(120,130), displays images, delays a predetermined gate signal and a predetermined data signal and outputs the delayed gate signal and data signal in response to an external touch signal. The first pulse converter receives the gate signals from the LCD panel and converts the gate signal corresponding to the touch signal such that the gate signal has a period longer than the period of other gate signals. The second pulse converter receives the data signals from the LCD panel and converts the data signal corresponding to the touch signal such that the data signal has a period longer than the period of other data signals. The detector receives the gate signals and the data signals from the first and second pulse converters and detects input position information of the touch signal.