LCD DISPLAY WITH OVERDRIVING TO IMPROVE DISCHARGING TIME

摘要

An Liquid Crystal Display (LCD) device with a display panel (DP) based on LC material. A driving circuit (C) is arranged to generate and apply a driving voltage (V) to drive the pixels (P) of the panel (DP) in response to the input data. The driving circuit (C) applies an overdriving voltage (V) during discharging of the LC material which is lower than the reference voltage level (Vcom) required to switch off the pixels, and which is further lower than prescribed by the input data. Hereby, the response time of the LC material is improved, and motion blur is thus reduced. In preferred embodiments, the LCD panel and the driving circuit (C) are arranged for a reference voltage level (Vcom) equal to a ground voltage level (GND), and wherein the driving circuit (C) is arranged to apply an overdriving voltage (V) during discharging which is negative compared to the ground voltage level (GND), such as the driving voltage (V) ranging from (-Vs/2) to (+Vs/2) and with (Vcom) centered at 0 V, i.e. based on a symmetrical supply voltage. Especially, the driving voltage (V) may be toggled between (-Vs/2) and (+Vs/2), possibly with an instantaneous shorting of the driving circuit (C) output to ground voltage level (GND) during ramp up and ramp down.