Title:
VARNISH FOR PHOTO-ALIGNMENT FILM AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2019211573
Kind Code:
A
Abstract:
To provide a varnish for forming a photo-alignment film that can prevent or suppress a DC afterimage and flickers in low-frequency driving in a liquid crystal display device.SOLUTION: A varnish for a photo-alignment film comprises a first polyamide acid-based compound and a second polyamide acid-based compound having higher polarity than that of the first polyamide acid-based compound in an organic solvent. The second polyamide acid-based compound is present in a larger amount than the first polyamide acid-based compound. The first polyamide acid-based compound contains: a skeleton derived from a tetracarboxylic acid compound having a cyclobutane skeleton, by 50 mol% or more; and a skeleton derived from a diamine compound having a primary amino group, a secondary amino group or a nitro group, by 10 mol% or less. The second polyamide acid-based compound contains: a skeleton derived from a tetracarboxylic acid compound having a cyclobutane skeleton, by 20 mol% or less; a skeleton derived from a pyromellitic acid dianhydride, by 10 mol% or less; and a skeleton derived from a diamine compound having a primary amino group, a secondary amino group or a nitro group, by 10 mol% or less.SELECTED DRAWING: None
Inventors:
SONODA HIDEHIRO
IKETA KOICHI
HIROTA TAKENORI
KUNIMATSU NOBORU
IKETA KOICHI
HIROTA TAKENORI
KUNIMATSU NOBORU
Application Number:
JP2018106287A
Publication Date:
December 12, 2019
Filing Date:
June 01, 2018
Export Citation:
Assignee:
JAPAN DISPLAY INC
International Classes:
G02F1/1337; C08G73/10
Domestic Patent References:
| JP2017129780A | 2017-07-27 | |||
| JP2012053394A | 2012-03-15 | |||
| JP2018013532A | 2018-01-25 | |||
| JP2011170031A | 2011-09-01 | |||
| JP2013101206A | 2013-05-23 | |||
| JP2013167782A | 2013-08-29 |
Foreign References:
| US20160024386A1 | 2016-01-28 |
Attorney, Agent or Firm:
Suzue International Patent Office