JPS6014329B2 - liquid indicator - Google Patents

Description

[Detailed description of the invention] The present invention relates to structural improvement of liquid crystal displays.

Specifically, by using a material in which a plastic polarizing plate is used as a substrate instead of a glass substrate, electrodes are directly formed on the inner surface of the substrate via a hard coating layer, and alignment treatment layers are sequentially formed, manufacturing steps can be reduced. The present invention also relates to a liquid crystal display that makes it possible to reduce the number of parts and reduce the thickness of the liquid crystal panel. Recent trends in liquid crystal displays used in digital watches, small computers, etc. include the desire for cheaper, smaller, and thinner products, forcing us to consider streamlining processing and making liquid crystal panels thinner. .

On the other hand, current liquid crystal displays, as shown in Figure 1, include a filter (■), an upper polarizing plate (■), an upper glass electrode substrate (■), a liquid crystal ■,
It consists of a lower glass electrode substrate (■), a lower polarizing plate (■), a reflector (■), and an electrode (■) that are bonded together with adhesive (■).

For this reason, there is a limit to how thin the total thickness of a liquid crystal display can be made, and since there are many parts, a large number of man-hours are required for processing. The present invention solves these problems, and aims to provide a thinner and cheaper liquid crystal display with a structure that allows for rational processing.

To explain the features of the present invention, firstly, the secondary glass electrode substrate is removed and a polarizing plate is used as the substrate instead of the glass substrate, and secondly, the polarizing plate is coated with electrodes on both sides of the polarizing plate substrate. Abrasion resistance to improve adhesion, block air permeability to the outside, and prevent damage from external factors.
This is due to the formation of a highly sensitive hard coating layer.

A configuration example according to the present invention will be explained in more detail with reference to the drawings.

Figure 2 shows an example of the structure of the present invention, in which the substrates are an upper polarizing plate (■) and a lower polarizing plate (■) on which a hard coating layer (■) is formed. Apply the coating ``■'' and directly form the electrode ``on the inner surface.''
At this time, if the support of the upper polarizing plate can already have a filter function, step (2) can be omitted. In addition, electrodes (2) are directly formed on the inner surface of the lower polarizing plate (2) in the same way as the upper polarizing plate, each inner surface is subjected to an alignment treatment, the peripheral edges of the electrodes are sealed, and liquid crystal is sealed inside to complete a liquid crystal display. Furthermore, if necessary,
If a reflective plate (2) is placed on the lower electrode substrate, a reflective liquid crystal display will be obtained. As a result, while the total thickness of a liquid crystal display with a secondary reflector was 2.5 leg t to 3 side t, the product of the present invention has a total thickness of 1. Side t-1.5 side t or 1. It is also possible to make it thinner than the auxiliary t, less than half of the auxiliary size or 1
/3 or less, making it possible to make it ultra-thin.
In particular, the product of the present invention could be extremely thin, with a thickness of 0.4 ribs to 1 rib, excluding the reflective plate. In addition, since the substrate of the present invention is made of plastic, there is no fear of cracking due to impact, etc. as with conventional glass substrates, and safety and reliability are significantly improved, and the external shape of the liquid crystal display is also better than that of glass substrates.
The degree of freedom has increased to a large extent. Furthermore, by using a plastic polarizing plate as a substrate, continuous (hoop) processing is also possible, making it possible to significantly reduce costs. Next, to explain the details of the multifunctional polarizing plate according to the present invention, first, a hard coating layer is coated on both sides of the plastic polarizing plate with oxides such as SiQ, TiO2, etc.
A transparent film having the above-mentioned purpose, such as a nitride such as 3N4, is formed by sputtering, coating, etc. After that, an ultraviolet absorbing film is formed on the front surface, that is, the surface on the cover glass side, and on the back surface, that is, the inner surface on the liquid crystal side. is the electrode ln
A transparent conductive film such as 203, Sn02, etc. is formed by sputtering or coating, and then a dielectric material and an alignment film such as aminosilane, polyimide, etc. are formed.
2 and the like by oblique vapor deposition or wrapping to form an alignment layer.

In addition, a hard coating layer is formed on both sides of the plastic lower polarizing plate, like the upper polarizing plate, and an electrode such as IQ03 is formed on the front surface, that is, the surface facing the liquid crystal, by sputtering or the like, like the back surface of the upper polarizing plate. Next, the above-mentioned upper and lower polarizing plates are sealed with an organic seal or the like, and liquid crystal is encapsulated to form a finished product as a liquid crystal panel. Regarding the reflector, except for those with a mechanism for lighting lamps, the hard coating layer formed on the back side of the lower polarizing plate has a satin finish, and the surface is coated with A.
It is possible to make the film even thinner by vapor-depositing it to also serve as a reflecting plate.

As a result of the above, it has become possible to obtain an ultra-thin liquid crystal display that cannot be obtained with conventional liquid crystal displays, and furthermore, by reducing the number of parts, it has become possible to greatly rationalize the number of man-hours.

Hereinafter, the details of the present invention will be explained with reference to Examples.

EXAMPLE A hard coating layer of Si02 was applied to both sides of the upper and lower polarizing plates made of plastic at 1000A using a high frequency sputtering device.

After that, the surface of the SiO film of the upper polarizing plate was cut below the peaks of total 0, so that the transmittance at wavelengths of 460 mr or more was 85.
% or more, and a ln2Q electrode film was applied on the back side using the same sputtering device as above.
It is formed to a thickness of 0A, and a polyimide alignment film is further formed on the same surface. Next, on the surface of the plastic lower polarizing plate having the hard coating layer of Si02, an electrode film of the same type ln2Q as the back surface of the upper polarizing plate is formed.

The upper and lower polarizing plates completed in this way are joined together using an organic seal, and liquid crystal is sealed to form a finished product as a liquid crystal panel.The resulting liquid crystal display body is combined with a reflector and has a total thickness of 1.2 side t. The thickness is less than half of that of the sub-chamber, and there are no problems in terms of quality and performance, making it a product with extremely great practical effects.

In the above embodiments, SiO2 was used as the hard coating layer.
However, the material is not particularly limited as long as it is a transparent coating other than Si02, such as Ti02, Si3N4, etc., which has excellent wear resistance and denseness. The electrodes are also other than ln203, SM2,
Cd○, Bi203, Fe203, Ct2Q, Y203
It is also possible to obtain the same effect by using a single layer or multilayer film such as . Furthermore, the method for treating the alignment film and the like is not limited to the examples. In this way, the present invention has made it possible to easily obtain a simpler and thinner liquid crystal display, and is extremely industrial in terms of cost reduction and safety, such as rationalization of processing and reduction of the number of parts. It is an effective invention.

As described above, the revolutionary improvement of directly using a polarizing plate as a substrate has the above-mentioned special effects, and it also has the effect of increasing the degree of freedom in planning products to which this panel is applied. It is something.

[Brief explanation of drawings]

Figure 1 shows a conventional liquid crystal display consisting of a filter ■, an upper polarizing plate ■, an upper glass electrode substrate ■, a liquid crystal ■, a lower glass electrode substrate ■, a lower polarizing plate ■, a reflector ■, an adhesive ■, and an electrode ■. Shows the structure of the display body. FIG. 2 shows the structure of a liquid crystal display according to the present invention, which is composed of an ultraviolet absorbing coating (2), an upper polarizing plate (2), an electrode (3), a hard coating layer (2), a lower polarizing plate (2), and a reflecting plate (3). Figure 1 Figure 2

Claims (1)

[Claims] 1. In a liquid crystal display in which two electrode substrates are disposed facing each other, the peripheral edges of the electrode substrates are sealed via a sealing member, and liquid crystal is filled between the two electrode substrates, the electrode substrate is 1. A liquid crystal display comprising a polarizing plate made of plastic, wherein electrodes are directly formed on at least the inner surface of the polarizing plate via a hard coating layer, and alignment treatment layers are sequentially formed.