Patent ID: 7741646
Filing Date: 2010-06-22
Classification: G02F,H01L

Abstract:
1. A liquid crystal display device, comprising: a thin film transistor array substrate; a color filter array substrate; a liquid crystal which is provided between the thin film transistor array substrate and the color filter array substrate, a first storage capacitor for storing a pixel voltage charged into the pixel electrode; a second storage capacitor for storing a signal sensed by the sensor thin film transistor; an integrated circuit for extracting the sensing signal stored in the second storage capacitor; a second thin film transistor connected to the second storage capacitor and the pre-stage gate line, and for selectively supplying the sensing signal to the integrated circuit; and a sensing signal transmitting line substantially parallel to the data line with having the pixel area therebetween, and for transmitting a sensing signal from the second thin film transistor into the integrated circuit, wherein the thin film transistor array substrate including a gate line and a data line crossing each other on a substrate to define a pixel area in which a pixel electrode is positioned; a first thin film transistor at an intersection area of the gate line and the data line; a sensor thin film transistor that senses light having image information and supplied with a first driving voltage from the data line; and a driving voltage supply line substantially in parallel to the gate line to supply a second driving voltage to the sensor thin film transistor, wherein the color filter array substrate including a black matrix for segmenting the pixel area and for preventing light leakage; a color filter formed at the cell area segmented by the black matrix, wherein a light receiving area is provided at an area corresponding to the sensor thin film transistor in the black matrix of the color filter array substrate.