Patent ID: 8679596
Filing Date: 2014-03-25
Classification: C09K,G02F

Abstract:
1. A liquid crystal display device comprising a first substrate and a second substrate that are arranged to face each other while sandwiching liquid crystal, wherein a first electrode and a plurality of second electrodes overlapped with the first electrode through an insulating film are formed at a pixel area on the liquid crystal side of the first substrate, one of the first electrode and the second electrodes is used as a pixel electrode, and the other is used as an opposite electrode; an alignment layer which is a two-layer structure is provided which includes a first alignment layer comprising a first polyimide and/or polyamic acid formed on the liquid crystal side of the first substrate to cover the second electrodes and the whole display area, and a second alignment layer comprising a second polyimide and/or polyamic acid formed on the liquid crystal side of the first alignment layer to cover the first alignment layer and the whole display area; the resistance of the second alignment layer is lower than that of the first alignment layer, and the transmittance of the second alignment layer is lower than that of the first alignment layer for the wavelength span of 400 nm to 500 nm of light; and at least the second alignment layer is configured using a polyimide and/or polyamic acid compound obtained by polymerizing PMDA (pyromellitic acid dianhydride) serving as a first compound with a hydrocarbon organic material, wherein the mass molar concentration of polymerized PMDA is higher in the second alignment layer than in the first alignment layer.