Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element
US10761375B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2016 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Nov 1, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133719
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides the following: a photo alignment method-use liquid crystal aligning agent used to obtain a photo alignment method-use liquid crystal alignment film that does not cause bright spots even when negative liquid crystals are used, and that is capable of achieving good after-image characteristics; a liquid crystal alignment film obtained from the liquid crystal aligning agent; and a liquid crystal display element provided with the liquid crystal aligning agent. Provided is the liquid crystal aligning agent which contains a polyimide or polyimide precursor obtained from a reaction between: a tetracarboxylic acid dianhydride represented by formula (1) (in the formula, X1 is as set forth in the present specification) or a derivative thereof; and a diamine component that contains a diamine represented by formula (2) (in the formula, R1, Z1 and n are as set forth in the present specification).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.