LIQUID CRYSTAL DISPLAY AND DEAD PIXEL TEST CIRCUIT AND METHOD FOR LIQUID CRYSTAL DISPLAY

摘要

A liquid crystal display includes a liquid crystal display panel and a test circuit. The liquid crystal panel includes a number of scanning lines and a number of data lines cooperatively forming a pixel cell. The test circuit includes a control unit, a gate driving circuit, a data driving circuit and a detecting circuit. The gate driving circuit and the data driving circuit respectively provide a scan pulse and a test pulse to the pixel cells. The test pulse includes a first voltage. After a predefined period for providing the scan pulse and the test pulse to the pixel cells, the detecting circuit detects a voltage of the data lines, and determines the pixel cell is damaged if the voltage of the data lines is equal to the first voltage. A test circuit and a test method for detecting damaged pixel cells are also provided.