Patent ID: 8345174

Claim:
A liquid crystal display (LCD) device comprising: an LCD panel comprising: a plurality of data lines for transmitting data signals corresponding to display images; a plurality of gate lines for transmitting scan signals; a first sensor signal line coupled to a first bias voltage; a second sensor signal line coupled to a second bias voltage; a display unit electrically coupled to a corresponding data line and a corresponding gate line for displaying images based on scan signals and data signals respectively received from the corresponding gate line and the corresponding data line; and a detecting unit electrically coupled to the second sensor signal line, wherein the detecting unit is electrically connected to the first sensor signal line or electrically isolated from the first sensor signal line based on a touch command, and comprises: a first storage capacitor electrically coupled to the first sensor line in response to the touch command for storing a sensing voltage received from the first sensor line; and a first thin film transistor (TFT) switch having a control end electrically coupled to a gate line, a first end electrically coupled to the second sensor signal line, and a second end electrically coupled to the first storage capacitor; and a signal processing circuit electrically coupled to the second sensor signal line for outputting corresponding output signals when output signals of the second sensor signal line vary.