In a liquid crystal display apparatus, sampling of an A-D converter for the purpose of capturing data from a touch panel is performed at a rate that is unrelated to the AC signal applied to the LCD, and data from the touch panel is captured in a regular manner in accordance with the sampling rate of...http://www.google.com.au/patents/US6236386?utm_source=gb-gplus-sharePatent US6236386 - Liquid crystal display apparatus with touch panel
