A projection type liquid crystal display device which displays an image on a screen by projecting the light emitted from a light source and passing through a liquid crystal display element onto said screen, said element having first and second liquid crystal panels, a plurality of signal electrodes which...http://www.google.com.au/patents/US5272553?utm_source=gb-gplus-sharePatent US5272553 - Projection type liquid crystal display device with twisted nematic liquid crystal layers
