Touch Panel Liquid Crystal Display Device and Method of Driving the Same

• Main Authors: SUNG, Tae-Kyoung, CHUNG, Jin-Soo
• Format: Patent
• Language: English
• Published: 27.06.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTRIC DIGITAL DATA PROCESSING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Disclosed is a touch panel LCD device for reducing power consumption, frequency noise, or audible noise by applying an LFD signal only to touch electrodes adjacent to touch electrodes for sensing touch and by grounding other touch electrodes and a method of driving the same. The touch panel liquid crystal display device includes touch electrodes arranged on a panel in a matrix form and multiplexers configured to drive the touch electrodes. Each of the multiplexers includes a output channels, a first switching block configured to output a touch sensing signal to a first output channel of the output channels, a second switching block configured to output a load free driving (LFD) signal to second output channels adjacent to the first channel among the output channels, and a third switching block configured to output a ground signal or a floating signal to third output channels among the plurality of output channels.