Liquid crystal display formed by a plurality of non-electrically interconnected liquid crystal display panels

Abstract

A liquid crystal display comprising a plurality of liquid crystal panels placed on a single plane of a large substrate, and a black matrix made of a photo-absorbing film that shows black when having absorbed light. Two polarizing plates are respectively placed to cover the front and rear surface of a set of liquid crystal panels almost entirely in such a manner that their polarizing axes intersect at right angles. The resulting multi-screen liquid crystal display consumes less power, retains excellent display quality, and makes the joints between the liquid crystal panels difficult to see.

Description

[0001]This application is a continuation of Pat. No. 08 / 468,649, filed Jun. 6, 1995, abandoned.FIELD OF THE INVENTION[0002]The present invention relates to a liquid crystal display used for AV (audiovisual) systems or OA (office automation) systems.BACKGROUND OF THE INVENTION[0003]Recently, the need for a high-definition large-screen display which is lighter, thinner and less-power-consuming has been increasing for a TV set representing the AV systems intended for home use or the OA systems. For this reason, the development of the large-screen displays including a CRT (cathode ray tube), an LCD (liquid crystal display), a PDP (plasma display panel), an EL (electroluminescent) display, and an LED (light emitting display) has been proceeding toward practical use.[0004]Of all types of displays, the liquid crystal display is most advantageous in that: it has the least depth (thickness); it consumes less power; and it easily displays full color images. Thus, the liquid crystal display ha...

AI Technical Summary

Benefits of technology

[0023]It is therefore the object of the present invention to present a low-power consuming, high-quality liquid crystal display device that can eliminate the problems caused by the multi-screen display method and make the joints between the liquid crystal panels difficult to see.

[0029]Also, it is desirable that the liquid crystal display further includes a second photo-blocking film which covers the liquid crystal display panels on an end surface of the connected part side along the longitudinal direction in a predetermined trace width. According to this structure, even when the viewer sees a display image diagonally, that is to say, he sees that same through the connected parts of the liquid crystal panels from the external of the liquid crystal display, the second photo-blocking film can curb the light leakage caused by the viewing angle characteristics of the above polarizing elements. Thus, not only a portion where light leaks through the connected parts of the liquid crystal panels shows black under the crossed nicol state of the first and second polarizing elements, but also the light leaking through the area other than the pixel electrodes and the connected parts of the liquid crystal panels can be eliminated in all the directions independently of the viewing angle of the viewer, thereby enabling a natural image on which the joints are more difficult to see.

[0030]In this case, it is desirable that the first photo-blocking film is made of a photo-absorbing film that shows black when having absorbed light. According to this structure, the surface reflection by the first photo-blocking film can be eliminated, thereby making the joints between the liquid crystal panels more difficult to see.

[0034]According to the above structure, unwanted light on an area other than the pixel electrodes can be blocked by the first photo-blocking film, and light passing through the spaces of the connected parts of the liquid crystal panels can be blocked completely by the third photo-blocking film to eliminate the light leakage through the connected parts of the liquid crystal panels completely. Thus, not only the light leakage through the area other than the pixel electrode of each liquid crystal panel 1 but also through the connected parts of the liquid crystal panels can be eliminated completely, thereby enabling a natural image on which the joints are more difficult to see.

[0035]It is desirable that the third photo-blocking film is made of an elastic photo-absorbing material because the irregularity, undulation, stress, etc. on the end surface of the connected parts of the liquid crystal panels can be absorbed by the elasticity of the third photo-blocking film. Since the spaces of the connected parts of the liquid crystal panels can be easily filled by the third photo-blocking film along the shape of the end surface of the connected parts of the liquid crystal panels, the spaces of the connected parts of the liquid crystal panels can be filled completely as a result. Thus, the light leakage through the connected parts of the liquid crystal panels can be eliminated completely, and the joints between the liquid crystal panels are made more difficult to see. Note that to fill the spaces of the connected parts completely with ease, it is desirable to use a photo-absorbing material whose elastic coefficient known as Young's coefficient is 104-108 N / m2, such as a silicon-based rubber, as the elastic photo-absorbing material.

Problems solved by technology

According to the above structure, a portion where light leaks through the connected parts of the liquid crystal panels shows black under the crossed nicol state of the first and second polarizing elements, thereby making the joints between the liquid crystal panels difficult to see.

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