An article feeder includes a feeder bin for holding and advancing a stack of articles. In addition, a light-transmitting lens layer, a light-transmitting layer, a light-transmitting protective layer, a common electrode made of an ITO film, and a second alignment film made of an obliquely deposited film are sequentially laminated on the one substrate surface of the light-transmitting substrate. Cache lines in sub-line coherency mode are operated or managed as sub-cache line portions of a full cache line.