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Process for producing spacer for liquid crystal display apparatus, ink for spacer formation, liquid crystal display apparatus and process for manufacturing the same

A technology of a liquid crystal display device and a manufacturing method, applied in nonlinear optics, instruments, optics, etc., capable of solving problems such as display deviation, difficulty in preparation for uniform coating of spacer materials, movement, etc., and achieving the effect of suppressing display deviation and light leakage

Inactive Publication Date: 2010-08-11
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the case of the above-mentioned conventional method using dispersed beads as a spacer (particulate spacer), there is a problem that the beads move due to the vibration of the liquid crystal display device because the beads are not fixed, and thus produce display deviation
[0006] However, the photolithography method has the following problems: since the photosensitive resin as a spacer material is temporarily coated on the entire surface of the substrate and then unnecessary parts are removed, there is a lot of material waste, and many processes such as development and peeling are required. Complicated process
In addition, it is necessary to prepare a plate for photolithography corresponding to each product, and there is also a problem that the process is complicated in this point.
Furthermore, with the increase in size of liquid crystal display devices in recent years, uniform coating of spacer materials and preparation of corresponding plates tend to become difficult.

Method used

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  • Process for producing spacer for liquid crystal display apparatus, ink for spacer formation, liquid crystal display apparatus and process for manufacturing the same
  • Process for producing spacer for liquid crystal display apparatus, ink for spacer formation, liquid crystal display apparatus and process for manufacturing the same
  • Process for producing spacer for liquid crystal display apparatus, ink for spacer formation, liquid crystal display apparatus and process for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Impurities were removed from the ink 1 by filtration with a membrane filter having a pore size of 20 μm. The ink 1 from which impurities were removed was supplied to a piezoelectric inkjet device (manufactured by Microjet Corporation, trade name: Nano-Printer 1000) equipped with a head having a diameter of 50 μm.

[0102] [Printing of ink for spacer formation, formation of spacer]

[0103] Using this inkjet device, the surface of the substrate obtained by forming an alignment film for VA liquid crystal on a glass plate (surface free energy: 29 mJ / m 2 ) at intervals of 150 μm, with a droplet volume of 15 pL, and based on the discharge position coordinates (target), ink 1 was printed. After ink 1 was printed once, the substrate was quickly transferred to a hot plate heated to 180° C., and dried and cured for 30 minutes to form spacers. Table 2 shows the properties of the inks used and the substrates.

[0104] [Evaluation of hit position accuracy]

[0105] The coordina...

Embodiment 2

[0119] Except for using ink 2 instead of ink 1, spacers were formed on the substrate surface in the same manner as in Example 1, and various evaluations were performed. Table 2 shows the properties of the inks used and the substrates. The evaluation results are shown in Table 3.

Embodiment 3

[0121] In addition to using a surface free energy of 35mJ / m on a glass plate 2 The VA liquid crystal is replaced by an alignment film with a surface free energy of 29mJ / m 2 A spacer was formed on the substrate in the same manner as in Example 1 except for the substrate obtained from the alignment film for VA liquid crystals, and various evaluations were performed. Table 2 shows the properties of the inks used and the substrates. The evaluation results are shown in Table 3.

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Abstract

A process for producing a spacer for liquid crystal display apparatus, comprising carrying out inkjet printing on substratum (23) with droplets of an ink containing a resin and a solvent dissolving the same but substantially not containing any solid particles and removing the solvent from the droplets on the substratum (23) so as to form spacer (11) disposed at given position on the substratum (23), wherein when the surface tension at 25 DEG C of the ink is referred to as X mN / N and the surface free energy at 25 DEG C of the substratum (23) as Y mJ / m2, the value A of the following formula (1) is in the range of -10 to 15 mJ / m2. A=X-Y (1).

Description

technical field [0001] The present invention relates to a method for manufacturing a spacer for a liquid crystal display device, an ink for forming a spacer, a liquid crystal display device, and a method for manufacturing the same. Background technique [0002] In recent years, liquid crystal display devices have been used as display devices such as color televisions and personal computer monitors. A liquid crystal display device generally has a structure in which a pair of transparent substrates having transparent electrodes and the like are arranged facing each other with a gap of 1 to 10 μm, and a liquid crystal material is sealed between the pair of substrates to form a liquid crystal layer. Applying an electric field to the liquid crystal layer through the electrodes aligns the liquid crystal material, and controls the transmission or non-transmission of light from the backlight through the orientation of the liquid crystal material, thereby displaying images. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1339
CPCG02F1/13394G02F2001/13398G02F1/13398
Inventor 丸山直树山本和德神代恭山浦格
Owner RESONAC CORPORATION