JPS61185785A - 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] Industrial applications The present invention can be used as a large screen display at a station.

It relates to large liquid crystal displays used for information and advertisements at airports, as well as for projection in halls and theaters.

Conventional Technology Liquid crystal displays have been widely used in watches, calculators, etc. because they can display images with low power consumption. Recently, large liquid crystal displays having a large number of display elements have been developed. This is to meet the public and social needs of providing information to a large number of people at once.

The structure of a liquid crystal display element constituting such a large-sized liquid crystal display will be explained with reference to FIG.

In this liquid crystal display element, a sealing resin 2 is arranged around two glass plates 1a and 1b that transmit light from a light source to form a certain gap, and a liquid crystal 3 is sealed inside the sealing resin 2.

Also, two glass plates 1a.

Transparent electrode extraction parts 4a and 4b are formed in 1b, and these electrode extraction parts 4a and 4b are connected to a drive circuit (not shown).
be contacted. Moreover, the glass plate 1a.

Polarizing plates 5a and sb are attached to both outer surfaces of 1b, and a diffusing plate 7 is attached to the light source θ side of the polarizing plate 6b.

A liquid crystal display is constructed by arranging a large number of the above-mentioned liquid crystal surface hydrogen elements on the same plane to form a large screen. FIG. 7 shows a large-sized liquid crystal display constructed in this manner, in which a large number of liquid crystal display elements 8 having the above-mentioned construction are arranged. In FIG. 7, 9 is a joint between adjacent liquid crystal display elements 8, and 10 is a lead wire for connecting the electrode lead-out portions 4a, 4b and a drive circuit. Here, the electrode extraction portion 4a side is also connected to the electrode extraction portion 4a.
It is pulled out and connected to side b.

Problems to be Solved by the Invention However, in such a conventional large-sized liquid crystal display, the sealing resin 2 and the electrode extraction portion 4a are located at the seam 9 from the front side (the side opposite to the light source 6).

4b, which formed the frame of each liquid crystal display element 8, resulting in a situation where grid-like blank lines were visible on the large liquid crystal display. This makes it difficult to see the image on the entire screen,
This was the biggest factor hindering the spread of large liquid crystal displays.

The present invention solves these conventional problems, and eliminates the visual confirmation of non-display lines caused by the seal resin parts and electrode lead-out parts located at the joints of multiple liquid crystal display elements, and improves the screen. The objective is to provide a large-sized liquid crystal display that makes it possible to make the overall brightness uniform.

Means for Solving the Problems In order to achieve this object, the large-sized liquid crystal display of the present invention has a large number of liquid crystal display elements arranged on the same plane, in which liquid crystal is arranged between glass plates that transmit light from a light source. , the display part of each of the above liquid crystal display elements is covered with a light guide that is made of an aggregate of plastic fibers or glass fibers and that guides a plurality of light rays, one or more of which is provided for one liquid crystal display element; The light guide also covers the seams between the liquid crystal display elements.

Effect: According to this configuration, by forming the screen with the light guide so as to cover the joints of multiple liquid crystal display elements, grid-like blank lines do not appear, and the entire screen of the large liquid crystal display is covered. This makes it possible to make the brightness visually uniform and make the entire image look good.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings. Here, in the embodiment of the present invention, the same parts as in the conventional example are given the same numbers, and the explanation is omitted.

1 to 3 show an embodiment of the present invention. First, a large number of liquid crystal display elements 8 having the above configuration are arranged on the same plane, and a plurality of light sources 6 are arranged on the back side thereof. 9 is a joint between adjacent liquid crystal display elements 8, and 1o is a lead wire for connecting the electrode lead-out portions 4a, 4b and a drive circuit. Here, the electrode extraction portion 4a side is also drawn out and connected to the electrode extraction portion 4b side as described above. However, in the present invention, the light guide 1 is provided in the viewing direction of the liquid crystal display element 8.
2 is each picture element 1 formed by a transparent electrode in the liquid crystal display element 8
A plurality of pixels are provided so as to guide the light rays of each picture element 11, each having a size corresponding to 1. The shape of the light guide 12 is such that the area of the opposite end surface connected to the picture element 11 is larger than that of the connected end surface, thereby expanding the display area. In addition, in the non-uniform light guide 13 which is a collection of light guides 12 corresponding to one liquid crystal display element 8, the sum of the areas of the opposite end faces connected to each picture element 11 is the same as that of the light guides 12. Including the adhesive portion 14, the area is the same as or almost comparable to the area of the liquid crystal display element 8 plus half the width of the seam 9.

From this structure, honeycomb light guide 1 is placed above seam 9.
The light guide 12 forming part 3 is always present.

As shown in FIG. 3, the light guide 12 has an interior 16 filled with glass fibers or plastic fibers 16 to guide light from the liquid crystal display element 8 side toward the viewing direction. In addition, the outer frame 1 of the light guide 12
7 is a solid that forms one light guide 12, and is a cylindrical solid made of a resin molded product such as acrylic, a metal molded product, or a glass fiber or plastic fiber 16.

In the above embodiment, one light guide 12 has a size that covers the outer periphery of one picture element 11 in the liquid crystal display element 8, but depending on the picture element arrangement of the liquid crystal display element 8, the fourth light guide 12 may be As shown in the figure, for example, a plurality of picture elements 11 may be covered with one light guide 12 using a combination of R, G, and B as one unit, and furthermore, the number of picture elements,
Depending on the pixel arrangement, one liquid crystal display element 8 may be covered with one light guide 12 as shown in FIG. 5.

Effects of the Invention As described above, the large-sized liquid crystal display of the present invention is constructed such that a light guide for guiding the light rays of each pixel of a plurality of liquid crystal display elements is installed in front of the liquid crystal display elements, and a plurality of liquid crystal display elements are arranged. By positioning the light guide over the sealing resin part and the electrode extraction part located at the joint of the liquid crystal display element, grid-like blank lines do not appear visually and the brightness of the entire screen is made uniform. If this is possible, the overall image quality can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a large liquid crystal display according to the present invention, FIG. 2 is a schematic configuration diagram showing the main parts enlarged, and FIG. The enlarged perspective view, FIG. 4, and FIG. 6 are schematic configuration diagrams showing other embodiments of the present invention, FIG. 6 is a diagram showing the configuration of a general liquid crystal display element, and FIG. 7 is a diagram showing a conventional large-sized liquid crystal display. FIG. 2 is a schematic configuration diagram of a display. 1a, 1b... Glass plate, 2... Mark/seal resin, 3... Liquid crystal, 4a, 4b... Electrode extraction part, e... Light source , 8...Liquid crystal display element, 9...Seam, 11...Picture element, 12...Light guide, 13...Honeycomb light Guide, 16...Inside of light guide, 1e...Fiber (plastic or glass), 17...Outer frame of light guide. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A large number of liquid crystal display elements in which liquid crystal is arranged between glass plates that transmit light from a light source are arranged on the same plane, and the display part of each of the liquid crystal display elements is made of an aggregate of plastic fibers or glass fibers, and one liquid crystal display element is covered with one or more light guides that guide a plurality of light rays, and these light guides also cover the joints of each of the liquid crystal display elements. LCD display.