JPS58147781A - Large liquid crystal display - 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 large-sized liquid crystal display in which a large number of liquid crystal elements are arranged, and a large-sized liquid crystal display having a particularly simple structure and mounting of crystal elements.

First, the general structure of a liquid crystal element constituting a large liquid crystal display will be explained with reference to FIG.

That is, a liquid crystal element 1a, two opposing glass plates 2.3
It consists of a liquid crystal cell 5 in which liquid crystal 4 is sealed, and polarizing plates 6.7 attached to both sides of the liquid crystal cell 50. In addition, in the figure, 8 cane diffusers and 9 light sources are shown.

Next, the operation of the liquid crystal element 1 will be explained. When the light emitted from the light source 9 is diffused through the diffuser plate 8 and reaches the polarizing plate 7, only the light having the same polarization plane as the polarization axis direction of the polarizing plate 7 passes through the polarizing plate 7. and reaches the liquid crystal cell 5.

The liquid crystal of the liquid crystal cell 5 has the function of rotating the plane of polarization of the incoming light by 90 degrees around the direction in which the light travels as a central axis. When a voltage is applied through the display, the light that has entered according to the four turns of the display is passed through as is.

Therefore, when a voltage is applied to the liquid crystal 4, the light passing through the polarizing plate 7 is 90° with respect to the light having the same polarization plane as the polarizing plate 7.
The light is separated into light having a rotated plane of polarization and reaches the polarizing plate 6. Since the polarizing plate 6#'i is arranged so that its polarizing axis is parallel to or perpendicular to the polarizing axis of the polarizing plate 7, the polarizing plate 6
Of the two lights that have reached , only the light having the same polarization plane as the polarization axis direction of the polarizing plate 6 is transmitted through the polarizing plate 6. Therefore, the area corresponding to the 9th turn of the display, the other area, and the display in K Since the brightness of K is different, a predetermined display can be performed.

Incidentally, large liquid crystal display grays having various structures have been proposed to simplify assembly and structure.

An object of the present invention is to provide a large-sized liquid crystal display that is easy to assemble and has a simple structure.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. , reveal.

FIG. 2 shows a large liquid crystal display according to the invention. This large-sized liquid crystal display includes a plurality of light sources 9, a diffusion plate 8 that diffuses and transmits light from these light sources, and a large number of liquid crystal elements 10. Each liquid crystal element 10
i; i, a liquid crystal cell 5 in which a liquid crystal 4 is sealed in two opposing glass plates 2.3; and a glass 3 of this liquid crystal cell 5;
It is composed of a polarizing plate 7 attached to the surface,
In addition to the large liquid crystal display of the present invention, the transparent support 11
Equipped with a. Transparent support 11ti A transparent material such as glass, acrylic, gelastec, etc. is formed into a plate shape *b,
The liquid crystal element 1O is directly fixed to the surface facing the light source 9, and the polarizing plate 12 is directly fixed to the opposite negative surface using transparent #4 adhesive or the like.

Next, the operation of the large liquid crystal display gray will be explained-6
That is, the light emitted from the plurality of light sources 9 is diffused by the light diffusing plate 8 and reaches the polarizing plate 7 of each liquid crystal element 10.
Only light having the same polarization plane as the polarization axis is transmitted and reaches the liquid crystal 4 via the glass plate 3. Assuming that a voltage is applied to each liquid crystal element 100 and liquid crystal 4, the light passing through the polarizing plate 7 is divided into two parts: light having the same polarization plane as the polarizing plate 7, and light having a polarization plane rotated by 900 degrees. ．． The transparent support 114C is reached through the glass &2 of each element 1o. Since this support 11 is transparent, the light divided into two parts is transmitted to the support 11.
Only the light having a plane of polarization that is aligned with the polarization axis of the polarizing plate 12 is transmitted through the polarizing plate 121. In this way, i! When a 1-light support 11 is used, a liquid crystal display can be performed by simply installing 4Cti and a large number of liquid crystal elements 10 directly.

In the above embodiment, the diffuser plate 8 may be attached to the transparent support 11, and in this case, the liquid crystal element 10 is attached to the opposite surface of the transparent support 11.

Furthermore, red, blue, and green color filters may be attached to the transparent support 11.

In the case of a large reflective LCD display, a reflective plate must be attached to the transparent support.

FIG. 3 shows another embodiment of the present invention, in which the transparent support 13 itself is provided with a polarizing function. Therefore, in this embodiment, the polarizing plate 12 of the embodiment shown in FIGS. #i and tIN2 is unnecessary, and the polarizing plate 12 is omitted. Therefore, in this embodiment, the number of parts for constructing the large liquid crystal display gray can be reduced and the structure can be simplified.

4 and 5 further illustrate another embodiment of the invention. In the embodiment of FIG. 4, the transparent support 14 itself has a diffusion function, and the diffusion plate 8 shown in FIGS. 2 and 3
is omitted. Further, in the embodiment shown in FIG. 5, the transparent support 15KtJ2 has a filter function. In this embodiment, as shown in FIG. 6, color filter portions 15A of red R1, green G, and blue B are provided at the positions where each liquid crystal element 10 of the four transparent supports 15 is to be attached. Therefore, there is no need to separately prepare and attach a color filter.

As is clear from the above description, the present invention has the following features.

Since a transparent support is used to mount a large number of liquid crystal elements, there is no need to provide holes for mounting the liquid crystal elements on the support itself, and the liquid crystal elements can be mounted on the transparent support without using a mounting frame or body. A large liquid crystal display gray can be constructed by simply attaching it directly to the support, which simplifies the assembly of the large liquid crystal display.Also, the support itself can retain the diffusion, polarization, and color filter functions, reducing the number of parts. Therefore, it is possible to obtain a large-sized liquid crystal display that is inexpensive and has a simple structure.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a liquid crystal element constituting a large-sized liquid crystal display, FIG. 2 is a schematic diagram of a large-sized liquid crystal display according to the present invention, and FIGS. 3 to 6 are schematic diagrams of other embodiments of the present invention. FIG. 1.10...Liquid crystal element, 2.3...Glass plate, 4.
...Liquid crystal, 5...Liquid crystal cell, 6,7.12...Polarizing plate, 810. Diffusion plate, 9... Light source, 11, 13, 14
．． 15...Transparent support. In addition, the same reference numerals in 1 indicate the same or corresponding parts. Agent Shin Kuzuno - Figure 2 Figure 3 @ Figure 4 Figure 6

Claims (4)

[Claims] (1) The same liquid crystal element has a liquid crystal cell that is equipped with a diffuser plate that diffuses light from a light source, and has a liquid crystal cell sealed between a polarizing plate that polarizes and transmits the light diffused by the diffuser plate and a glass plate. A large-sized liquid crystal display, in which a large number of liquid crystal elements are arranged on a flat surface, is characterized in that a large number of the above-mentioned liquid crystal elements are directly attached to a plate-shaped transparent support. (2) The large-sized liquid crystal display gray according to claim 1, wherein the transparent support has a polarizing function and is used as a polarizing plate for each of the liquid crystal elements. (3) The large liquid crystal display gray according to claim 1, wherein the transparent support has a diffusion function and is used as the diffusion plate. (4) The large liquid crystal display gray according to claim 1, wherein the transparent support has a red, green, and blue color filter function.