INTEGRATED METHOD OF DETECTING AN IMAGE DEFECT IN A LIQUID CRYSTAL SCREEN

摘要

An integrated method of detecting an image defect in an LCD screen consists in checking the consumption of current on a supply bus of the image display means (line driver 20, column driver 30, counterelectrode CE), during capacitive chargings or dischargings of the selection lines Li and/or columns CoIRj,. The method comprises the integration of a current measurement chain comprising a measurement resistance Rm on the supply bus and circuits for measurement 41 and comparison 42 outputting from the screen a detection signal Sd which is processed by an external safety management circuit.