JPH05232420A - Method for assembling liquid crystal panel - Google Patents

Abstract

PURPOSE:To uniformalize the temp. in a panel surface and to prevent the lap shear of counter substrates by thermal expansion by alternately laminating liquid crystals and hot plates and directly heating the panel surfaces. CONSTITUTION:The hot plates 1 and the liquid crystal panels 2 are alternately laminated and the entire part is clamped and pressurized by pressurizing jigs 3. Heat insulating materials 4 are inserted between the laminated liquid crystal panels 2 and the pressurizing jigs 3 to suppress the heat conduction from the liquid crystal panels 2. The hot plates 1 are subjected to temp. control by a power source 5 capable of controlling the temp. Then, the heating up speed is increased by heating the entire surface of the panels. Since there is no need for heating the pressurizing jigs 3, electric power consumption is reduced and further, the heating up speed of the panels is increased. The panels may also be heated by using metallic plates provided with vent holes or liquid passage holes in place of the hot plates 1 and passing gas or liquid subjected to temp. control therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a liquid crystal panel, and more particularly to a method for firing an epoxy resin as a sealing material.

[0002]

2. Description of the Related Art In a liquid crystal panel, as shown in FIG. 2, a matrix electrode substrate 6, a color filter substrate 7 as a counter electrode, a spacer material 8 for keeping a constant gap between the both substrates, and an interposing between the both substrates. The liquid crystal 9 and the sealing material 10 that seals the liquid crystal are used.

A thermosetting epoxy resin adhesive is usually used as the sealing material, which is applied to any one of the above substrates by a method such as screen printing, and then both substrates are superposed on each other. After pressing with a press machine etc. as shown,
150-160 ℃ with pressure applied between substrates with a pressure jig
A method is used in which baking is performed so as to maintain the temperature of about 2 hours for curing.

[0004]

In this conventional sealing material firing method, since liquid crystal panels are laminated and the side surfaces of the panels are heated, a temperature difference occurs between the outer peripheral portion and the central portion of the panel, and thermal expansion causes the liquid crystal panels to overlap with the opposing substrate. Misalignment is likely to occur, the temperature rise rate of the furnace cannot be increased due to the above problems, and the pressure jig with a large heat capacity is also heated at the same time, so the power consumption of the firing furnace is large, Further, there is a drawback that it takes a long time to cool the temperature.

[0005]

According to the method of assembling a liquid crystal panel of the present invention, a hot plate is used as a heat source in baking a sealing material of a liquid crystal panel, and the liquid crystal panel and the hot plate are alternately laminated and heated under pressure. It is characterized by Further, instead of the hot plate, a metal plate having a vent hole or a liquid passage hole is used, and a gas or liquid whose temperature is controlled is caused to flow to be heated.

[0006]

The present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a seal firing apparatus according to a first embodiment of the present invention. The hot plates 1 and the liquid crystal panels 2 are alternately laminated, and the whole is sandwiched and pressed by the pressing jig 3. A heat insulating material 4 is inserted between the laminated panel 2 and the pressure jig 3 to suppress heat conduction from the panel 2. Hot plate 1
Is controlled by a power source 5 capable of temperature control.

FIG. 4 is a schematic view of a seal firing apparatus according to the second embodiment of the present invention. FIG. 5 is a perspective view of the metal plate 12 having many ventilation holes used in this embodiment.
The temperature of the panel 2 is raised by blowing hot air from the ventilation holes 13 of the metal plate 12. Further, the temperature can be lowered quickly by blowing cold air.

[0008]

As described above, according to the present invention, since the panel surface can be directly heated by alternately laminating the liquid crystal panel and the hot plate, the temperature in the panel surface becomes uniform, and the counter substrate of the counter substrate due to the thermal expansion is formed. It has the effect of preventing misalignment.

Further, the effect of increasing the temperature rising rate by heating the entire surface of the panel and the effect of reducing the power consumption since there is no need to heat the pressing jig and further increasing the temperature raising / lowering rate of the panel can be achieved. Have.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a firing apparatus used in a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the structure of a liquid crystal panel.

FIG. 3 is a schematic view of a conventional baking apparatus.

FIG. 4 is a schematic diagram of a firing apparatus used in a second embodiment of the present invention.

FIG. 5 is a schematic view of a metal plate used in the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot plate 2 Liquid crystal panel 3 Pressurizing jig 4 Heat insulating material 5 Temperature controllable power source 6 Matrix electrode substrate 7 Color filter substrate 8 Spacer material 9 Liquid crystal 10 Sealing material 11 Firing furnace 12 Metal plate 13 Vent hole 14 Heater and fan 15 duct

Claims (2)

[Claims] 1. A method for assembling a liquid crystal panel, wherein a hot plate is used as a heat source when the sealing material of the liquid crystal panel is fired, and the liquid crystal panel and the hot plate are alternately laminated and heated while being pressurized. 2. When firing a sealing material of a liquid crystal panel, a metal plate having a vent is used as a heat source, the liquid crystal panel and the metal plate are alternately laminated, and a temperature-controlled gas or liquid is flowed through the vent. A method for assembling a liquid crystal panel, which comprises heating by heating.