A plurality of main seal patterns and dummy seal patterns are formed by a sealant
on one of substrates. The plurality of main seal patterns individually enclose
each of a plurality of display areas. The dummy seal patterns individually enclose
the plurality of main seal patterns, and sides of the dummy seal patterns facing
sides of the one substrate are all interconnected. These formations enable constant
vacuum levels to be maintained the inside and the outside of the main seal patterns
when the inside of a chamber of an assembling device is recovered to atmospheric
pressure. Therefore, distortion of substrates is impeded in the vicinity of the
main seal patterns, and degradation of display quality can be prevented.