Light blocking spacer material is disposed so as to at least partially cover the data and/or gate lines in a variety of liquid crystal display (LCD) devices. The material prevents spurious visual information from being displayed as a result of high RMS supply voltages applied to the data lines, such...http://www.google.com.au/patents/US4904056?utm_source=gb-gplus-sharePatent US4904056 - Light blocking and cell spacing for liquid crystal matrix displays
