发明授权
US08303844B2 Benzo[f]chrome any pyrano[3,2-f]chrome derivatives for use in liquid crystal media 有权
苯并[f]铬任何用于液晶介质的吡喃并[3,2-f]铬衍生物

Benzo[f]chrome any pyrano[3,2-f]chrome derivatives for use in liquid crystal media
摘要:
The present invention relates to benzo[f]chromene and pyrano[3,2-f]-chromene derivatives of the formula I in which L1, L2, R1, R2, A1, A2, Z1, Z2, m and n are as defined in claim 1, to the preparation thereof, to the use thereof as components in liquid-crystalline media, and to electro-optical display elements which contain the liquid-crystalline media according to the invention.
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