JPS6087314A - Manufacture of liquid crystal display plate - Google Patents

Abstract

PURPOSE:To enhance yield and to prevent waste of liquid crystals by forming scribed lines on glass bases, and coating them with an organosilicone compd., and heat dividing the bases in dividing plural liquid crystal cells formed between the glass bases. CONSTITUTION:Plural liquid crystal cells 5 are formed between upper and lower large-sized glass bases 1, 3, and scribed lines 6 are formed on the outside surface of each bases 1, 3, and the lines 6 are coated with an organosilicone compd. to form a silicone compd. soln. layers. Then, the lines 6 are irradiated with IR rays to heat them and divide the bases 1, 3. As a result, waste of liquid crystals and stains on the surfaces of the bases 1, 3 can be prevented, reliability can be enhanced, and the manufacturing cost can be lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for manufacturing a liquid crystal display plate, and more particularly to a dividing method for manufacturing a large number of liquid crystal cells from a large glass substrate.

(B) Prior Art Conventionally, when manufacturing a liquid crystal display board, upper and lower glass substrates cut into the size required for one liquid crystal display board are prepared, transparent electrodes are formed on the glass substrates, and transparent electrodes are formed on the glass substrates. After alignment treatment, the upper and lower glass substrates were bonded together using an adhesive layer provided with a liquid crystal injection port to obtain a liquid crystal cell. After injecting liquid crystal into the liquid crystal cell, the injection port is sealed to form a liquid crystal display panel. However, with this method, one liquid crystal display board
It is inefficient because it is manufactured individually. Therefore, a method has been proposed in which two large glass substrates with multiple transparent electrode patterns formed on them and whose surfaces have been subjected to orientation treatment are bonded together using an adhesive layer to form a large number of liquid crystal cells, and then separated by cutting and dividing. It has been implemented. There are two cutting methods: one uses a dicing device, and the other uses a diamond cutter to set and divide scribe lines.The former method prevents cuttings from entering the inside of the liquid crystal cell. In the latter case, the glass substrate is passed between rollers and is distorted and broken, so there is a risk that the bond between the adhesive layer and the glass substrate may peel off due to the distortion. ! I'm tearing it up.

(c) Purpose of the Invention The present invention has been made in view of the above-mentioned points. When dividing a plurality of liquid crystal cells provided on a large glass substrate, a scribe line is provided and an organic silicon compound is added to the scribe line. The purpose of this invention is to provide a method for manufacturing a liquid crystal display panel in which liquid crystal cells are divided by coating and heating the liquid crystal display panel, and to improve the yield.

B) Structure of the Invention The present invention provides a method for manufacturing a liquid crystal display panel in which a plurality of liquid crystal cells are formed on upper and lower large glass substrates and the liquid crystal cells are individually divided. Scripe lines are formed on the surfaces of the upper and lower large glass substrates, and an organic silicon compound is applied to the scratch lines, and then an infrared beam or a laser beam is irradiated onto the scratch lines to heat the glass substrate. This is a configuration that divides the

(E) Embodiment FIG. 1 is a partial sectional view showing an embodiment of the present invention. On the - side of the upper large glass substrate (1), a plurality of electrode patterns, such as segment electrode patterns and counter electrode patterns, are alternately provided by transparent electrodes (2), and similarly, a plurality of electrode patterns, such as segment electrode patterns and counter electrode patterns, are provided alternately on the - side of the lower large glass substrate (3). A plurality of electrode patterns are also provided on the - side using transparent electrodes (2). Transparent electrode (2)
The upper and lower glass substrates (11(3)) provided with are subjected to an alignment treatment using an alignment agent or rubbing, and then
A frame-shaped sealing material (4) such as an organic adhesive is provided on one of the glass substrates (11 (3)) so as to surround each electrode pattern, and the upper and lower glass substrates (1) (3) Y
Stick them together while maintaining the specified spacing and dry. Thereby, a plurality of liquid crystal cells (5) are formed.

In order to divide the plurality of liquid crystal cells (5) formed in this way, the surfaces of the upper glass substrate (11) and the lower glass substrate (3) are divided in the vertical and horizontal directions according to the outer shape of the liquid crystal cells (5). A cut is made with a diamond cutter to form a 7-shaped groove, ie, a scribe line (6).A solution layer (7) of an organic silicon compound is then formed along the groove of the scribe line (6).

As the organic silicon compound, for example, alkylsilane is used, and by dropping this alkylsilane onto several places on the scribe line (6) of the upper glass substrate (1) and the lower glass substrate (3), the scribe line (6) is formed. 6)
It spreads over the entire scribe line (6) due to capillary action caused by the grooves. Thereafter, an infrared beam (9) focused by a lens (8) is irradiated onto a part or several locations of the scribe line (6) or along the scribe line (6). As a result, when the silicon compound in the scribe line (6) is heated and the solution evaporates, a film of the organosilicon compound is formed on the scribe line (6), and further, due to the heating, the silicon compound in the scribe line (6) is heated. Only the glass portion of the glass substrate (1) is heated and thermally expands, so that cracks (10) are generated from the grooves of the scribe line (6) in the thickness direction of the glass substrate (1), and the glass substrate (1) is cut.

Therefore, according to the above method, no force is applied from the outside to separate the sealing material (4) and the glass substrate.
1) Peeling from (3) is prevented. Furthermore, although an infrared beam is used in the embodiment shown in FIG. 1, a C02 laser beam or the like may also be used. In this case, the output of the laser beam does not need to be high enough to melt the glass, and may be sufficient to sufficiently heat the organic silicon compound.

FIG. 2 is a perspective view of the liquid crystal cell (5) divided by the method shown in FIG. As shown in FIG. 1, by applying a solution of an organic silicon compound to the scribe line (6) and heating it, an organic A film aυ of a silicon compound is formed. Since this organic silicon compound has hydrophobicity and is heated to a temperature of 120° C., in the step of injecting liquid crystal from the liquid crystal injection port (121) opened at the side end of the liquid crystal cell (5), When immersing the liquid crystal inlet (12) in the liquid crystal and pulling it up,
Since the organic silicon compound coating aυ repels liquid crystal, less liquid crystal is exposed to the glass substrate (1) (31), reducing the amount of liquid crystal consumed. When stopping, the coatings aυ on both sides of the injection port prevent the adhesive from flowing onto the surface of the glass substrate (11(3)).In this way, in order to divide the glass substrate (11(3)), The applied organic silicon compound not only divides the glass substrate m(3), but also efficiently consumes the liquid crystal and seals the glass substrate fil(3) with the sealing adhesive of the injection port (12).
) It works to prevent surface stains.

(F) Effects of the Invention As described above, according to the present invention, the yield when dividing liquid crystal cells from a large glass substrate is improved, and furthermore, wasteful consumption of liquid crystal and staining of the surface of the glass substrate are prevented. Therefore, it is possible to improve the reliability and reduce the cost of the liquid crystal display panel.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention, and FIG. 2 is a perspective view of a liquid crystal cell manufactured by the method shown in FIG. +1H3)...Glass substrate, (2)...Transparent electrode, (4)...Sealing material, (5)...Liquid crystal cell,
(6)...Scribe line, (7)...Solution layer of organic 7-recon compound, (8)...Lens, (
9)...Infrared beam, Q meter...Crack, Qll
...Organic silicon compound coating, 02...Liquid crystal injection port 0

Claims (1)

[Claims] 1. In a method for manufacturing a liquid crystal display panel, in which a plurality of liquid crystal cells are formed on upper and lower large glass substrates, and the liquid crystal cells are individually divided, the upper and lower large glass substrates are After forming a scribe line on the surface of a glass substrate and applying an organic silicon compound to the scribe line, the glass substrate is divided by irradiating and heating the scribe line with an infrared beam or a laser beam. , a method for manufacturing a liquid crystal display board with characteristics.