JPS6048018A - liquid crystal display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of invention; TII application] The present invention is directed to liquid crystal display devices, particularly to the 4H formation of air bubble substrates.

[Background of the release ψ]

In recent years, a plastic liquid display element has been proposed in the I-Kaisho-Ishizoku 1-inch model, in which the envelope into which the liquid crystal is inserted is made of a translucent plastic film cover instead of the glass substrate used in other countries. has been done. This plastic liquid crystal display element is constructed by interposing a liquid crystal entirely between two plastic film substrates on which electrodes are formed on the same surface, and sealing the periphery with a sealing material. In particular, a twisted nematic ivy type display (hereinafter referred to as TN display) liquid crystal display (1i+ has a transmission type display device by pasting a polarizing plate on the outer surface of a film substrate, or two films, 'J! (Of the two plates, the upper plate has a polarizing plate, and the lower plate 411
A reflective display device is constructed by gluing together a 1K polarizing plate and a reflecting plate.

The liquid crystal display device configured in this way is shown in Figure 1 (a).
As shown in (b), translucent upper and lower electrodes 3 and 4 are respectively formed on the opposing surfaces of upper and lower substrates 1 and 2 made of translucent plastic films.

A liquid crystal display element is formed by enclosing a liquid crystal 7 in an envelope 6 formed by arranging the lower substrates 1.2 and 2 facing each other with a sealing material 5 containing a spacer in between. Upper and lower polarizing plates 8 and 9 should be arranged on the outer surfaces of the upper and lower substrates l' and 2 of the element, respectively, and the optical properties of the liquid crystal between the upper + '! Board 9
If the light reflecting plate 10 is mounted on the outer surface of the iN4 light plate 8, it can be used from the upper iN4 light plate 8 side.

In the liquid crystal display device configured as described above, the liquid crystal 6.
('The upper and lower polarizing plates 8 disposed in contact with the outer surface of the indicator.
As shown in FIG. 2, a polarizer 12 is interposed between two polyethylene terephthalate films 11 at positions i and f, and is uniaxially stretched in the direction of the arrow.

In addition, in recent years ('I 31! A plastic liquid crystal display device has been proposed which is constructed from a film and has a separate coloring plate on the outer surface of the liquid crystal display device.

However, in the liquid crystal display device configured in this manner, the substrates 1/, 2/ for forming the screen are made of three layers in which moon photons 12 are sandwiched between polyethylene terephthalate films 11 as supports, as shown in FIG. We have 1 near G construction! 7, due to the non-uniformity of the tension of the white that is laminated to the polarizer 12 of the polyethylene terephthalate film 1 as the upper and lower supports, the unevenness of the adhesive application used for lamination 9 etc. , Warping and deformation due to heat may occur]-<, Also, warping or warping during the manufacturing process,
Misalignment of the upper and lower electrodes 3.4 may occur due to deformation, etc.
There has been a problem in that quality and reliability are degraded, and mass productivity is also significantly degraded.

[Purpose of the invention]

Therefore, the present invention improves the thermal warpage of the polarizing substrate and the heat resistance of the dimming level, expands the margin of process conditions, improves the yield υ, and provides a liquid crystal display with improved display quality and reliability. The purpose is to provide equipment.

[Summary of the invention]

In order to achieve this purpose, the 13Ij is made of a single-layer 4N structure in which a polarizer is fused to the inside of a -axis-stretched film using a single-thickness substrate.

[Embodiments of the invention]

For reference, a total of 14 embodiments of the present invention are shown using FIG.
11, μ+1 is shown.

FIG. 4 is a perspective view of a main part of a polarizing substrate for explaining one layer of the liquid crystal display device "t" according to the present invention. In the same figure,
The polarizing substrate 2I is, for example, on polyethylene tele 7 clay,
Polycarbonate, polysulfone.

Polytrifluorochloroethylene, polytetrafluoroethylene, Akaneme W (a≧O,'960) polyethylene or crystalline 1
i(d≧0.910,1 For example, an anthraquinone resin is contained in the transparent resin 22 such as polypropylene.

A dye 23 such as an organic dye such as a diazo dye or an inorganic dye having 41 structures of an inorganic complex forming a long molecule is dissolved on the surface, and the entire structure is formed as shown by the arrow H-B'.
It is uniaxially stretched in the force direction and has a function.

Next, as a method for making this deflection substrate, without any problem, the above-mentioned translucency -rtj)+effect 22 should be maintained without crystallizing (
After setting aside and adding the appropriate column of dye 23 and stirring,
It is shaped, stretched in the direction of arrow B-B' and cooled to form a stretched film. At this time, the stretching direction (arrow B
The dye 23 is oriented along the negative crystal part of the crystal of the jJ″rI22 growing in the −11′ direction), and polarizing ability is generated in the film.

The following will explain based on examples.

First, polyethylene terephthalate (hereinafter P'kJ'I
Anthraquinone Kento'JF423 was added to JJ Resin 22 as the main ingredient, and molded.
t i&, − axis stretched to a thickness of about 150 μnl) North +
rM> Form a tin plate 2I. Next, this polarizing substrate 21
To form a transparent film containing indium oxide and tin oxide as main components, photoresist coating and exposure.

3jA house, after about 1 stage of etching, etc., not shown.

The lower electrode produces sound. In this way, after forming the self-direction 1k consisting of the polyetheramide pattern IJ on the base plate, it was sealed using an epoxy sealant. Iil.

All of the electrode substrates are adhered to form an outer shell 6 as shown in FIG. 3'. A twisted amorphous liquid crystal display device 6 was fabricated by roughly filling and sealing a twisted amorphous liquid crystal material in this external curver.

Next, as a comparative example, uniaxially stretched PE with a thickness of about 100 μm
The 'l' film was used as the support for the 21st parent.
A TN type liquid crystal display device was fabricated using an FBJ optical substrate having the same structure and going through the same four steps as in the previous example.

Comparing the milled rice of the example and the comparative example obtained in this way, firstly, the profile of the mouth substrate during the manufacturing process was approximately 115 or less in the example than in the comparative example, which was the maximum distance 1tiL. (Lmax). In the same figure, in the case of a substrate 30 having a size of 100x100, the warpage "AtL" generated during the manufacturing process was approximately 1 mm in the example, and about 5 rnrn at maximum in the comparative example.

In addition, when examining the deterioration of the polarization degree of the liquid crystal display device L after light extraction, it was conducted under the same temperature and high humidity conditions of approximately 80"C and 95φRFl. However, in the case of the comparative example, the degree of polarization deteriorated by about 20φ or more after about 500 hours of exposure, and it was found that the optical display quality deteriorated significantly.

〔Effect of the invention〕

As described above, the present invention has the extremely advantageous effect of providing a liquid crystal display device that is extremely advantageous for mass production, has high quality and reliability, and is optimal for thinning.

[Brief explanation of the drawing]

1 to 3 are diagrams for explaining an example of a conventional liquid crystal display device, FIG. 4 is a perspective view of a polarizing substrate for explaining an example of a liquid crystal display device according to the present invention, and FIG. 5 is a diagram for explaining an example of a liquid crystal display device according to the present invention. It is a figure explaining the means to measure the amount of deflection of a board|substrate. 3...Top electrode, 4...Top electrode, 5...Sealing material, 6...Envelope, 7...Liquid crystal, lO...
・Reflector, 21...Polarizing substrate, 22...Resin,
23... Dye. 1. Country (Nation) Figure 2.1

Claims (1)

[Claims] An outer layer formed by sealing the peripheral edges of a pair of electrode substrates with pattern display electrodes on opposing surfaces with an organic sealant.
A liquid crystal display device in which a liquid crystal is inserted into the interior of the liquid crystal display device, wherein the electrode substrate is made of an integral Ti film with a polarizer interposed inside a field-stretched film.