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A process of producing a liquid crystal display and a curable resin composition used in the same

A liquid crystal display, curing resin technology, applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems of uncured, sealant outflow, LC pollution, etc.

Inactive Publication Date: 2019-03-01
SUZHOU RAINBOW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can be problematic as the overlapping portion of the encapsulant on the black matrix remains uncured and flowable even after exposure to UV
Uncured sealant is easy to flow out into the liquid crystal from the overlapping part, causing LC contamination
[0005] On the other hand, although irradiating UV light from the array side is also conceivable, challenges remain because the metal wiring and transistors on the array substrate overlap the encapsulant pattern and create shadow areas, which in turn lead to "shadow curing" problems , because the uncured part of the sealant tends to flow out from the sealant and come into contact with the LC, which also leads to LC contamination

Method used

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  • A process of producing a liquid crystal display and a curable resin composition used in the same
  • A process of producing a liquid crystal display and a curable resin composition used in the same
  • A process of producing a liquid crystal display and a curable resin composition used in the same

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preparation example Construction

[0038] In step 1) of the method of manufacturing an LCD of the present invention, the curable resin composition is applied on the peripheral portion of the surface of the first substrate so as to lap around the substrate periphery in a frame shape. The portion where the curable resin composition is applied in a frame shape is called a sealing area. The curable resin composition can be applied by methods known in the art, such as screen printing and dispensing, preferably dispensing.

[0039] The sealing area generally has a rectangular box shape, and the LCD display portion is formed in the sealing area in the central area. Sealed areas on the outer surfaces of the base material, electrodes, and electrical / electronic component mounting spaces may be used if desired.

[0040] The first and second substrates used in the present invention are typically transparent glass substrates. Usually, transparent electrodes, active matrix elements (such as thin film transistors TFT), alig...

Embodiment 1

[0112] The sealant composition of Example 1 was used to prepare units by different ODF methods including the method of the invention, a conventional UV plus heat curing method and a pure heat curing method according to the prior art. Check LC penetration and LC compatibility under a microscope at a magnification of X100.

[0113] Table 2. Test results of different methods

[0114]

[0115] 1 "Prior art" methods are those based on figure 1 The conventional ODF method.

[0116] 2 "Purely thermal" process refers to the same process as the conventional ODF process, except that the step of radiation curing the curable resin composition is not included.

[0117] As an important requirement to ensure the quality and reliability of LCD panels, LC or air permeation is very critical, especially when the line width of the encapsulant becomes narrower, which is obviously a market trend, or when the cell gap is larger. LC or air infiltration may lead to low adhesion and poor water ...

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Abstract

An improved one-drop-filling process of producing a liquid crystal display having a liquid crystal layer between a first substrate and a second substrate comprises steps of applying a curable resin composition on a sealing region at a periphery of a surface of the first substrate; radiation curing the curable resin composition, and obtaining a partially cured product; dropping liquid crystal on acentral area encircled by the sealing region of the surface of the first substrate or the corresponding area of the second substrate, and forming the liquid crystal layer; overlaying the second substrate on the first substrate; and thermal curing the partially cured product.

Description

technical field [0001] The present invention relates to a method of producing a liquid crystal display and a curable resin composition used in the method. In particular, the present invention relates to an improved single drop filling process for the preparation of liquid crystal displays. Background technique [0002] Liquid crystal display (LCD) panels having light weight and high-definition characteristics have been widely used as display panels for various devices including mobile phones and televisions. The traditional method of manufacturing LCD panels is called the one-drop-filling (ODF) method, such as figure 1 As shown in , the method includes: applying a sealant on a substrate having an electrode pattern and an alignment film under vacuum conditions, dropping liquid crystal (LC) on the substrate having the sealant applied thereon, and Opposite facing substrates are bonded to each other under vacuum, then the vacuum is released, and ultraviolet (UV) irradiation or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1339
CPCG02F1/1339G02F1/1341G02F1/13415G02F2202/025
Inventor 李琴陆婧王明海陈大卫
Owner SUZHOU RAINBOW MATERIALS CO LTD
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