JPS60233684A - Laminate type lcd 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 The present invention relates to a liquid crystal display device, particularly a stacked type liquid crystal display device.

Liquid crystal display device
play (abbreviated as LCD) is In1O1 or IT
This device has a structure in which liquid crystal (Llquld Crystal) is sealed between glass substrates with conductive transparent thin layers such as O (Indlum Tin Oxide) as specific pattern electrodes, and the alignment of liquid crystal molecules is achieved by applying voltage between the electrodes. It is possible to change the intensity of reflected light or transmitted light from an external light source by changing the . Therefore, by changing the electrodes to which voltage is applied, it is possible to display specific characters or images, and this liquid crystal display device has become extremely popular as a character display device for watches and calculators, as well as a device for displaying characters and images on toys and other devices. It's coming. Very recently, small liquid crystal televisions have appeared that have the above-mentioned conductive transparent electrodes arranged in a matrix, and it is thought that public funds will be applied to the field of dynamic character image display more and more in the future.

Figure 1 shows a conventional LCD with electrodes arranged in a matrix.
It schematically shows the structure of the device, where (a) is a plan view;
Qll) is a sectional view taken along line A-A in (a).

A conductive transparent electrode 1- as a scanning electrode is provided on the glass substrate 1.
1 are arranged in a strip shape, and conductive transparent electrodes 2-2 as signal electrodes are also arranged in a strip shape on the glass substrate 2, and these electrodes face each other perpendicularly to seal the peripheral part of the display device. A liquid crystal 10 is injected from an injection lower into a gap surrounded by a liquid crystal sealing adhesive 6, sealed with a liquid crystal sealing adhesive 8, and polarizing plates 11 are arranged orthogonally to form an LCD device. Pixels are the intersections of strip-shaped transparent electrodes arranged in a matrix. Such a conventional structure LCD
In devices, it is possible to obtain a reasonably high density of pixels by narrowing the width of the strip-shaped transparent electrodes and the electrode spacing, but it is difficult to increase the area because the resistivity of the transparent electrode film is not very low. There are limits to increasing the density, and there are also limits to functionality.The purpose of the present invention is to create high-density pixels by stacking liquid crystal layers in multiple layers in an LCD device in which electrodes are arranged in a matrix. The object of the present invention is to provide an LCD device that has the following functions and can obtain new functions.

In order to achieve the above object, the LCD device according to the present invention includes:
It is characterized by the fact that it uses three or more glass substrates with transparent electrodes, has multiple liquid crystal layers, and provides a group of transparent electrodes for scanning and signals that are perpendicular to each other and sandwich the liquid crystal layer in each liquid crystal layer. have

The thickness of glass substrates used in recent LCD devices can be gradually reduced to 0.2% or 0.2%. In some cases, IX1 or less can now be obtained over a large area with smoothness and good uniformity, and as the performance of liquid crystals (purity, transparency, contrast ratio, etc.) improves, the thickness of the liquid crystal layer can also be made extremely thin. Based on these two points, it has been experimentally confirmed that there is no problem in visibility even if multiple liquid crystal layers are stacked, that is, the sense of distance between images of each layer can be ignored. be. In this way, the number of signal and scanning electrodes can be increased by n times compared to the conventional one, if the number of laminated electrodes is considered difficult, and a matrix-like LCD device with high-density pixels can be easily obtained. be.

The positions of the signal and scanning electrodes may be the same when viewed from above, or may be slightly shifted, and may be selected depending on the purpose. Furthermore, by changing the scanning and signal control for each layer, new advanced functions such as image superimposition and comparison can be provided.

When the glass substrate is thick as commonly used, for example, when the thickness is 0.7%, 1.1%, or 1.5%, the LCD device of the present invention has the above-mentioned structure from the viewpoint of visibility. Although it is not possible to obtain an LCD device that looks like a single-plane image and has high-density pixels, it is possible to provide an entirely new and different function. An example of this is shown in Figure 2 (a). # Shown in (b), (e) and FIG.

In this example, five glass substrates 1 to 5 are used for the liquid crystal layer 1.
It shows four layers of 0. Figure 2 (&) A
-A' As shown in FIG. 2(b) which shows a cross-sectional view in the force direction, each of the glass substrates 1 to 4 has a scanning electrode group designated by reference numerals 1-1 to 4-1 in the lateral direction of the display device. The scanning electrode groups 1-1 to 4-1 are arranged in a strip shape from one end to the other, but the positions where the scanning electrode groups 1-1 to 4-1 are provided are the second
Figure 2 (,
), each liquid crystal layer is made to have a different color. On the other hand, the signal electrode groups are arranged in a strip shape in the vertical direction of the display device, as shown by symbols 2-2 to 5-2 on each of the glass substrates 2 to 5, and these signal electrodes exist. The range varies in length from one liquid crystal layer to another, rather than from one end of the display device to the other. Figure 2(a)
+ Referring to (b), the signal electrode 2-2 in the first liquid crystal layer is the longest (mu), and becomes shorter in the second and third layers, and the signal electrode in the fourth liquid crystal layer becomes shorter. The electrode 5-2 is the shortest (4). A laminated LCD device with such a structure can provide new functions such as a three-dimensional effect to images and characters that were not possible with conventional LCD devices. Fig. 2(e) gives a convex three-dimensional effect, while Fig. 3 showing another embodiment shows the length of each layer of the signal electrode as shown in Fig. 2(e).
On the contrary, it gives a portal-like three-dimensional effect. In addition,
In FIG. 2, reference numeral 6 is a sealing adhesive, 7 is a liquid crystal injection port, 8 is a liquid crystal sealing adhesive, 9 is a reinforcing adhesive, and 11 is a polarizing plate.

In Figure 2(e) and Figure 3, it was mentioned that convex and concave three-dimensional displays are possible, but the length of the signal electrode in Figure 2 ((+) and Figure 3 is determined for each liquid crystal layer. It is easy to understand that a complex three-dimensional effect can be achieved by applying various techniques.

The present invention has been explained using a matrix LCD device as an example.
The effects of the present invention are particularly effective in LCD devices that require a large number of electrode groups, some of which are arranged in a matrix.

As is clear from the above, by stacking multiple liquid crystal layers, it is possible to obtain an LCD device with new performance and functions that could not be obtained with conventional LCD devices, and the range of application of LCD devices is will expand significantly.

[Brief explanation of the drawing]

FIG. 1 shows a conventional matrix-type LCD device.
Figure (a) is a plan view, and figure (b) is a sectional view. Figure 2 shows a laminated type IJ Lux LCD according to the present invention.
This is an example of the device, (a) is a plan view, (b) is (a)
) is a cross-sectional view taken along the line A-N, (e) is a cross-sectional view taken along the line B-B',
FIG. 3 is a sectional view similar to FIG. 2(e) showing another embodiment of the present invention. 1-5... Glass substrate; 1-1-4-1... Scanning electrode group; 2-2-5-2... Signal electrode group; 6...
Sealing adhesive; 7... Liquid crystal injection port; 8... Liquid crystal sealing adhesive; 9... Reinforcing adhesive; 10... Liquid crystal; 1
1...Polarizing plate. Patent applicant: Stanley Electric Co., Ltd. Agent: Patent attorney Yasushi Kaizu: Patent attorney Hirayama - Kodai 3 i::(1

Claims (1)

[Scope of Claims] (1) In a liquid crystal display device in which a large number of electrode groups are provided by arranging electrode groups in a matrix, at least three or more glass substrates having electrodes are used, and a liquid crystal layer is provided between these glass substrates. A laminated LCD device characterized in that a plurality of liquid crystal layers are laminated by providing. (2. In the multilayer LCD device using an ultra-thin glass substrate as described in claim 1, the number of scanning electrodes is the number of stacked liquid crystal layers times the number of scanning electrodes of one glass substrate. (3) In the multilayer LCD device using a thick glass substrate according to claim 1, the length of at least the signal electrode of each liquid crystal layer is determined for each liquid crystal layer. The above-mentioned LCD device is characterized in that it enables stereoscopic display by changing to