Liquid crystal display apparatus and manufacturing method thereof
A technology of a liquid crystal display device and a manufacturing method, applied in optics, instruments, nonlinear optics, etc., can solve the problem of unsatisfactory image afterimage phenomenon, and achieve the effect of suppressing image afterimage phenomenon and good reliability.
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Embodiment approach 1
[0066] The liquid crystal display device of this embodiment has a structure in which a liquid crystal layer containing liquid crystal molecules is sandwiched between a pair of substrates, at least one of the pair of substrates has an alignment film on the surface of the liquid crystal layer side, and the alignment film The film is formed by performing an alignment treatment based on light irradiation to a film formed using an alignment film material containing a first constituent material and a second constituent material exhibiting alignment of the liquid crystal molecules by light irradiation The property of controlling is that the second constituent material is a polymer that does not have the property of controlling the alignment of the liquid crystal molecules, and at least a part of the polymer is imidized.
[0067] In addition, the liquid crystal display device of this embodiment is manufactured through the following steps: forming the above-mentioned film on the above-m...
Embodiment 1
[0228] First, two 0.7-mm-thick glass substrates having transparent electrodes made of ITO were prepared.
[0229] Next, a copolymer of diamine having the above-mentioned photofunctional group, diamine having no photofunctional group, and an acid anhydride was synthesized, and a polyamic acid having an imidization rate of 0% was prepared as a first constituent material.
[0230] In addition, a copolymer was synthesized using 2,2-dimethyl-4,4-diaminobiphenyl and an acid anhydride (CBDA) represented by the above formula (21) as monomer components, and the imidization rate was 45%. The polyimide (partial polyimide) is used as the second constituent material.
[0231] Next, the first constituent material / second constituent material=30% by weight / 70% by weight of the first constituent material and the second constituent material were dissolved in N-methylpyrrolidone (NMP) to prepare an alignment film material (varnish) . In addition, the concentration of the first constituent mate...
Embodiment 2
[0236] The liquid crystal display element of Example 2 was produced through the same process as in Example 1 except that the main firing process of the alignment film material was performed at 200°C.
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Abstract
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