A pair of polarizing plates are disposed on two sides of a TN-type liquid crystal cell constituted by a liquid crystal twist-aligned at a twist angle of 80.degree. to 120.degree.. A retardation plate is disposed between one of the polarizing plates and the liquid crystal cell in such a manner that the...http://www.google.com.au/patents/US5583678?utm_source=gb-gplus-sharePatent US5583678 - Color liquid crystal display apparatus
