Method for manufacturing substrate having liquid crystal alignment film for in-plane-switching-type liquid crystal display element

Abstract

The present invention provides a highly efficient in-plane-switching-type liquid crystal display element endowed with alignment controllability and having excellent ghosting characteristics. The present invention provides a method for manufacturing a substrate having a liquid crystal alignment film, the method having: [I] a step for applying, on a substrate having a conductive film for in-plane switching, a polymer composition containing (A) a photosensitive side-chain polymer exhibiting liquid crystal properties in a predetermined temperature range, (B) di-isobutyl carbinol, and (C) an organic solvent and forming a coating film; [II] a step for irradiating the coating film obtained in [I] with polarized ultraviolet rays; and [III] a step for heating the coating film obtained in [II]; whereby is obtained a liquid crystal alignment film for an in-plane-switching-type liquid crystal display element endowed with alignment controllability.

Description

technical field

[0001] The present invention relates to a method for manufacturing a substrate having a liquid crystal alignment film for a transverse electric field drive type liquid crystal display element. In detail, it is related with the novel method for manufacturing the liquid crystal display element which has a liquid crystal aligning film which is excellent in afterimage characteristics, linearity of an edge part is high, and swelling of an edge part is small. Background technique

[0002] Liquid crystal display devices are known as display devices that are light in weight, thin in cross-section, and low in power consumption. In recent years, they have been used in large-scale television applications, etc., and have achieved remarkable development. The liquid crystal display element is constituted, for example, by sandwiching a liquid crystal layer between a pair of transparent substrates provided with electrodes. Also, in a liquid crystal display element, an organ...

Examples

preparation example Construction

[0229] [Preparation of polymer composition]

[0230] The polymer composition used in the present invention is preferably prepared in the form of a coating liquid so as to be suitable for forming a liquid crystal aligning film. That is, the polymer composition used in the present invention is preferably prepared in the form of a solution in which a resin component for forming a resin coating is dissolved in an organic solvent. Here, the resin component refers to a resin component containing the above-mentioned photosensitive side chain type polymer capable of expressing liquid crystallinity. In this case, the content of the resin component is preferably 1% by mass to 20% by mass, more preferably 3% by mass to 15% by mass, particularly preferably 3% by mass to 10% by mass.

[0231] In the polymer composition of this embodiment, the above-mentioned resin components may all be the above-mentioned photosensitive side-chain polymers capable of exhibiting liquid crystallinity, and m...

Embodiment 1

[0320] NEP (49.0g) was added to the obtained methacrylate polymer powder (A) (6.0g), and it stirred and melt|dissolved at room temperature for 5 hours. PB (20.0g) and DIBC (25.0g) were added and stirred to this solution, and the liquid crystal aligning agent (A1) was obtained.

Embodiment 2

[0322] NEP (49.0g) was added to the obtained methacrylate polymer powder (A) (6.0g), and it stirred and melt|dissolved at room temperature for 5 hours. PB (10.0g) and DIBC (35.0g) were added and stirred to this solution, and the liquid crystal aligning agent (A2) was obtained.

technical field

[0001] The present invention relates to a method for manufacturing a substrate having a liquid crystal alignment film for a transverse electric field drive type liquid crystal display element. In detail, it is related with the novel method for manufacturing the liquid crystal display element which has a liquid crystal aligning film which is excellent in afterimage characteristics, linearity of an edge part is high, and swelling of an edge part is small. Background technique

[0002] Liquid crystal display devices are known as display devices that are light in weight, thin in cross-section, and low in power consumption. In recent years, they have been used in large-scale television applications, etc., and have achieved remarkable development. The liquid crystal display element is constituted, for example, by sandwiching a liquid crystal layer between a pair of transparent substrates provided with electrodes. Also, in a liquid crystal display element, an organ...

Examples

preparation example Construction

[0229] [Preparation of polymer composition]

[0230] The polymer composition used in the present invention is preferably prepared in the form of a coating liquid so as to be suitable for forming a liquid crystal aligning film. That is, the polymer composition used in the present invention is preferably prepared in the form of a solution in which a resin component for forming a resin coating is dissolved in an organic solvent. Here, the resin component refers to a resin component containing the above-mentioned photosensitive side chain type polymer capable of expressing liquid crystallinity. In this case, the content of the resin component is preferably 1% by mass to 20% by mass, more preferably 3% by mass to 15% by mass, particularly preferably 3% by mass to 10% by mass.

[0231] In the polymer composition of this embodiment, the above-mentioned resin components may all be the above-mentioned photosensitive side-chain polymers capable of exhibiting liquid crystallinity, and m...

Embodiment 1

[0320] NEP (49.0g) was added to the obtained methacrylate polymer powder (A) (6.0g), and it stirred and melt|dissolved at room temperature for 5 hours. PB (20.0g) and DIBC (25.0g) were added and stirred to this solution, and the liquid crystal aligning agent (A1) was obtained.

Embodiment 2

[0322] NEP (49.0g) was added to the obtained methacrylate polymer powder (A) (6.0g), and it stirred and melt|dissolved at room temperature for 5 hours. PB (10.0g) and DIBC (35.0g) were added and stirred to this solution, and the liquid crystal aligning agent (A2) was obtained.

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