JPH079513B2 - Liquid crystal display manufacturing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a liquid crystal display body having a polarizing ability using a flexible substrate.

<Prior Art> 50 to 30 in place of the conventional liquid crystal display using a glass substrate
Attempts have been made to manufacture a lightweight, thin and flexible liquid crystal display using a thin plastic film of about 0 μm as a substrate material. A normal twist-nematic liquid crystal display requires a liquid crystal cell consisting of two substrates sandwiching a liquid crystal layer and a polarizing plate above and below the liquid crystal cell, but this polarizing plate is easier to mount when fixed to the liquid crystal cell. And is usually attached to the liquid crystal cell using an acrylic adhesive or a silicone adhesive. However, when a polarizing plate is attached by the method related to a liquid crystal cell made of a plastic film substrate, the work becomes more difficult as the thinner polarizing plate is used, and the liquid crystal cell may be broken during the attachment.

<Purpose> The present invention has solved these drawbacks, and its purpose is to:
It is to make it easy to attach a polarizing plate to a liquid crystal cell using a plastic film substrate.

<Outline of the present invention> The present invention manufactures a large number of liquid crystal displays with polarizing plates by assembling a plastic film substrate on which a large number of electrodes are formed, adhering polarizers at the same time, and then cutting them individually. Is the way to do it.

At this time, one side of the common electrode substrate facing the terminal portion of the segment electrode substrate is previously cut to expose the terminal portion of the liquid crystal display body (this step is referred to as a primary cutting step), and two substrates are After assembling, and attaching a large number of polarizing plates at the same time, they are individually cut (this cutting step is referred to as a secondary cutting step). At this time, it is necessary that the polarizing plate, which has been cut at a portion corresponding to the primary cutting portion, is positioned and bonded so that the primary cutting portions coincide with each other.

For these cutting, a method of cutting with a knife such as a knife, a method of shearing cutting, a method of pulling out with a press, a laser cutting method or the like can be used. The polarizing plate is made of polyvinyl alcohol dyed with iodine or a dichroic dye, and has a thickness of 70 to 180 μm coated with cellulose triacetate or with an acrylic resin. Stick with an adhesive. An aluminum-based reflector may be attached to the polarizing plate that is attached to the common electrode substrate side.

<Example> Next, the present invention will be described based on Examples.

Example 1 FIG. 1 shows the layout of the electrode pattern of this example.

The substrate 1 made of plastic film has a thickness of 100μ
An indium tin oxide, which is the transparent conductive film 2, was formed in a thickness of 500Å by a low temperature sputtering method using a polyether sulfone film having a size of 20 m and a size of 20 cm. Next, as shown in FIG. 1, common electrodes were formed on the common side substrate (a) by the photolithographic method, and the same number of segment electrodes were formed on the segment side substrate. Further, the primary cutting portion 3 in FIG. 1 (b) was cut with a cutting blade. Next, an alignment film 8 was formed on both substrates, baked, and then rubbed in a predetermined direction with gauze to perform an alignment treatment. Next, an epoxy-based sealant 6 is screen-printed, and after conducting a vertical conduction process, a gap agent 7 made of fine glass fiber powder is sprinkled on the surface. After combining both substrates, the sealant is heat-cured. It was As shown in FIG. 2, the upper polarizing plate 9 and the lower polarizing plate 10 having a portion corresponding to the primary cutting portion previously cut are attached to the liquid crystal cells assembled at the same time, and the whole is secondarily cut. It was cut at point 12 and separated into cells. Liquid crystal was vacuum-injected into this, the injection port was sealed with an epoxy adhesive, and an aluminum reflector was attached to the lower side of the panel to complete a liquid crystal display.

(Example 2) Similar to Example 1, with respect to a liquid crystal cell in which a large number of liquid crystal cells were assembled at the same time, the upper polarizing plate 18 and the aluminum reflection in which a portion corresponding to the primary cutting portion was cut in advance as shown in FIG. After the plate-attached lower polarizing plate 19 was attached, the whole was secondarily cut to separate it into individual cells. Liquid crystal was vacuum-injected into this, and the injection port was sealed with an epoxy adhesive to complete a liquid crystal display.

(Example 3) Similar to Example 1, a plurality of upper polarizing plates 27 were simultaneously attached to a liquid crystal cell simultaneously assembled as shown in FIG.
No. 28 was attached, and the whole was secondarily cut to separate it into individual cells.
Liquid crystal was vacuum-injected into this, and the injection port was sealed with an epoxy adhesive to complete a liquid crystal display.

(Example 4) For a polyether sulfone film on which a transparent conductive film was formed in the same manner as in Example 1, the first substrate (a) and the second substrate (b) as shown in FIG. The common electrode and the segment electrode formed a continuous pattern. Further, the primary cutting point 33 in FIG. 5 was cut with a cutting blade. After assembling this in the same manner, the upper and lower substrates, which had been cut at the portions corresponding to the primary cutting portions in advance, were attached as shown in FIG. 6, and then the whole was subjected to the secondary cutting. Liquid crystal was injected into this, the injection port was sealed, and an aluminum reflector was attached to the lower side of the panel to complete a liquid crystal display.

Example 5 As shown in FIG. 7, common electrodes and segment electrodes were formed on the first substrate (a) and the second substrate (b).
Next, the primary cutting point 45 in FIG. 7 was cut and then assembled in the same manner. Next, the upper and lower substrates, which had been cut at a portion corresponding to the primary cutting portion in advance, were attached as shown in FIG. 8 and then the whole was subjected to a secondary cutting.

Example 6 As shown in FIG. 9, common electrodes and segment electrodes were formed on the first substrate (a) and the second substrate (b). Next, the primary cutting point 57 shown in FIG. 9 was cut and then assembled in the same manner. Next, the upper and lower substrates, which had been cut in advance at the portions corresponding to the primary cutting portions, were attached as shown in FIG.

<Effect> As described above, according to the present invention, it becomes easy to attach a polarizing plate to a liquid crystal cell using a plastic film substrate,
There is an advantage that the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 shows the layout of electrode patterns in the first, second, third and fourth embodiments of the present invention. FIG. 2 is a sectional view showing a state where the polarizing plate according to the first embodiment is attached, FIG. 3 is a sectional view showing a state where the polarizing plate according to the second embodiment is attached, and FIG.
The cross-sectional view in the state where the polarizing plate in the example of the figure is attached is shown. Further, FIG. 5 shows a layout of electrode patterns in the fifth embodiment, and FIG. 6 shows a sectional view of a state in which a polarizing plate in the fifth embodiment is attached. FIG. 7 shows a layout of electrode patterns in the embodiment of FIG. 6, and FIG. 8 shows a sectional view of a state in which a polarizing plate of the sixth embodiment is attached. FIG. 9 shows the layout of the electrode patterns in the seventh embodiment. FIG. 10 is a sectional view showing a state in which the polarizing plate according to the seventh embodiment is attached. 1,4,13,22,31,34,43,46,55,58 …… Substrate 2,32,35,44,47,56,59 …… Transparent electrode 3,11,20,29,33,41 , 45,57,65 …… Primary cutting point 12,21,30,42,53,54,66 …… Secondary cutting point 6,15,24,36,48,60 …… Sealant 7,16,25 , 37,49,61 …… Gap agent 8,17,26,38,50,62 …… Alignment film 9,18,27,39,51,63 …… Upper polarizing plate 10,19,28,40,52 , 64 …… Lower polarizing plate

Claims (1)

[Claims] 1. A step of combining a pair of substrates made of plastic so as to form a plurality of cells, and one polarization plate having a size corresponding to the plurality of cells on the outer side of the combined pair of substrates. A method for manufacturing a liquid crystal display, comprising a step of attaching a plate, and thereafter cutting the polarizing plate and the substrate to which the polarizing plate is attached to divide the cell into individual cells.