Liquid crystal display device and manufacturing method thereof

Abstract

In a liquid crystal display device, support columns are formed on the outside of a seal area in an edge area of opposing substrates, thus reducing substrate deformation and preventing the occurrence of air bubbles inside the liquid crystal layer, undesirable coloring of the display area, and color irregularity. Support columns 9 formed using a conductive ink are provided on the outside of seal material 6 used for sealing liquid crystal layer 5 contained between top substrate 1 and bottom substrate 2. The support columns 9 prevent the warping of substrates 1 and 2 caused by the shrinkage of mold material 8 during hardening, reducing the changes in the liquid crystal layer thickness. Support columns 9 are print-formed simultaneously with the conductive connection area of the liquid crystal panel, and are hardened simultaneously with the seal material.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThe invention relates to a liquid crystal display device, and more particularly to technologies for enhancing the structure of the peripheral area of the substrate of a liquid crystal display.2. Description of the Related ArtIn conventional liquid crystal display devices, the sealing of a liquid crystal layer between two substrates, and the application of voltage between the electrodes formed in pairs on the back side of the liquid crystal layer change the orientation of the liquid crystals inside the layer, making it possible to display various images. FIG. 7 depicts an example of an enlarged cross-sectional view of the substrate edge area of a conventional liquid crystal display devices, and FIG. 8 is a perspective view from above showing the overall configuration.As shown therein, both the top and bottom substrates 1, 2 are constituted by clear glass plates, and transparent electrodes 3 and 4 are formed in specified patterns on ...

AI Technical Summary

Benefits of technology

Therefore, it is the object of the present invention to solve the above-mentioned problems and provide a new structure for a liquid crystal display device, that can prevent substrate deformation by dispersing the stress applied to the substrates.

It is another object of the present invention to improve the display quality of liquid crystal display devices by reducing dimensional errors in the liquid crystal cell structure caused by external stress.

It is a further object of the present invention to improve product yield by preventing quality degradation of liquid crystal display devices due to mold formation.

It is a still further object of the present invention to achieve a method that does not require any special design change or addition of manufacturing steps in order to prevent substrate deformation caused by mold formation.

Problems solved by technology

Such conventional devices have numerous drawbacks problems and has a disadvantage for example in the above-mentioned conventional liquid crystal display device, it is necessary to fill and coat the gap between top substrate 1 and bottom substrate 2 with resin molding material 8 in order to secure the area where electrode pads 3a and 4a and insertion pins 7 with legs are conductively connected, and to prevent electrolytic corrosion of electrode pads 4a, in the electrode lead-out area where bottom substrate 2 extends outward beyond the edge area of top surface 1.

Furthermore, the stress accompanying the resin coating changes the cell thickness of the liquid crystal panel, and tends to produce coloring and color irregularity.

Because the formation of this mask reduces the liquid crystal display area, it increases the overall cost of manufacturing a liquid crystal display.

The above-mentioned coloring and color irregularity become particularly serious problems in large-size liquid crystal panels since cell thickness may vary widely within the panel surface.

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