The invention provides a display device of which a contrast ratio is enhanced. By providing stacked polarizing plates so as to be in a cross nicol state, a contrast ratio of a display device can be enhanced. The stacked polarizing plates are stacked outside a light-transmissive insulating substrate in a parallel nicol state. When the number of polarizing plates is four or five in total, a contrast ratio becomes the highest.
申请公布号
EP1783540(A1)
申请公布日期
2007.05.09
申请号
EP20060022862
申请日期
2006.11.02
申请人
SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
发明人
ISHITANI, TETSUJI;EGI, YUJI;NISHI, TAKESHI;MORIYA, KOJI