Patent ID: 7777840

Claim:
A transflective liquid crystal display device which is configured of first and second substrates and a liquid crystal layer placed between the first and second substrates, and which includes a reflective region for controlling the amount of reflected light and a transmissive region for controlling the amount of transmitted light, the transflective liquid crystal display device comprising: a reflective electrode placed on the reflective region of the first substrate; a transparent electrode which is placed on the transmissive region of the first substrate and is electrically isolated from the reflective electrode; a first thin film transistor which is formed on the first substrate and is connected to the reflective electrode; a second thin film transistor which is formed on the first substrate and is connected to the transparent electrode; a common electrode which is formed on the second substrate and is placed to face both the reflective electrode and the transparent electrode; a voltage generation unit generating a common voltage which is supplied to the common electrode and is changed every frame; and a first data driver for supplying a first data signal to the reflective electrode via the first thin film transistor and a second data driver for supplying a second data signal to the transparent electrode via the second thin film transistor; a first auxiliary capacitor connected to the reflective electrode; a second auxiliary capacitor which is connected to the transparent electrode, wherein at least a portion of said second auxiliary capacitor is placed on a boundary portion between the reflective region and the transmissive region, where said boundary portion is a portion lacking both the reflective electrode and the transparent electrode; wherein the first and second data drivers receive the same display signals and generate the first and second data signals such that a voltage value of the first signal is less than a voltage value of the second signal.