To eliminate uneven luminance between columns, and along with this, to eliminate uneven luminance also among EL elements in several columns in an EL display device for performing matrix display, in a matrix type EL display device in which a scan voltage is sequentially applied to scan electrodes and...http://www.google.com.au/patents/US5973456?utm_source=gb-gplus-sharePatent US5973456 - Electroluminescent display device having uniform display element column luminosity
