JPS59119381A - 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 display device, and more particularly to a backlight-type large-scale flat panel display device using liquid crystal.

It is an object of the present invention to provide a large flat display device that will enable future large screens for wall-mounted televisions.

Traditionally, large screen displays have been of the movie-like screen projection type or the type called projection television, and also those made by arranging many small CFtTs or lamps.However, the former two are A part of the projector had to be located away from the screen, which was very inconvenient in terms of effective use of the room. Furthermore, a type in which a large number of CRTs and the like are lined up cannot be used indoors due to price, power consumption, and size limitations.

The present invention eliminates these drawbacks, has a size that can be used even in general rooms, has low power consumption, and further integrates a display device and a controller, making it possible to create a compact flat display device. From this point of view, the idea of using liquid crystal display devices for low power consumption wall-mounted displays is already known, but with conventional technology, it is difficult to realize a large color display that can cover several hotels. It is impossible to manufacture it with panels, and when a plurality of panels are arranged side by side, pixels are missing in the areas where they touch each other, which significantly impairs display quality. The present invention solves these drawbacks and enables flat color display on a large liquid crystal display device, and proposes a method suitable for flat display ranging from several tens of centimeters square to several meters square.

Hereinafter, the present invention will be described in detail with reference to the drawings.〇 Fig. 1 shows a display surface of an embodiment of a large-sized liquid crystal display device of the present invention.

1 is a front (upper) film substrate forming a liquid crystal display, and is made of a plastic film. 2 is a film substrate on the back (lower side) as well. As will be described later, the display body formed by 1 and 2 is 5 in this example.
They are combined to create one large display. Reference numeral 3 denotes a sealing part for sealing the liquid crystal sealed between the film substrates 1 and 2, which is usually a band of adhesive and is a non-displayable area. 4 is a hole for assembling and holding a plurality of display bodies as described later.

FIG. 2 shows a cross-sectional structure of the embodiment when the display surface of FIG. 1 is cut along t-t'. In the figure, 1 to 4 are the same as shown in FIG. In FIG. 2, reference numeral 5 denotes a transparent board in front of the display, which is made of glass or plastic and is intended for mechanical strength and protection of the display. 6 is a color filter film, which is made by printing or vapor deposition on a thin glass or plastic substrate. This color filter film can also be integrally formed on the inner surface of the front transparent board 5. 7 and 8 are linear polarizing films; 9
is a transparent glass or plastic holding plate. That is, the liquid crystal display has a structure in which the ends are bent to form an L or F-shape, sandwiched between one board 5 and several holding plates 9, and fixed at both ends with fixtures 10. Since the fixtures are arranged at the ends, they do not need to be transparent, but they are fixed through the holes 4 at the four corners with bolts or the like. A light source 13 is placed at an appropriate position on the back of the display device thus created. A reflective board 11 is placed behind the light source. The reflective board has a concave surface processed to uniformly project the light from the light source 13 forward, and a flexible connector 14 connected to the electrode lead at the bent and protruding end of the display body passes through it. A window will be opened. The reflective board 11 has a size one size larger than the display surface, and is made of plastic or the like with metal plating on the reflective surface, and the circuit board 1 has built-in circuit elements for display control, TV signal processing, etc. on its back surface.
Place 2. A window is also made in this circuit board, each flexible connector 14 is passed through it, and the end of the connector is pressure-bonded onto the circuit board.

Connected via soldered or mechanical separate connectors. If the entire display device, light source system, and circuit board are housed in a suitable housing, a completed large-sized display device will be obtained. Thermocompression bonding or the like can be used to connect the lead portion of the liquid crystal display and the flexible connector.

With the above configuration, the thickness of the liquid crystal display is actually much thinner than that shown in FIG. 2, so the sealing portion of the display does not appear on the surface and does not impair display quality. This embodiment is constructed on the premise of color television display, and requires a total of approximately 500 horizontal and approximately 1900 vertical display electrode lines. Therefore, the vertical line is 10,
It is divided and taken out using a flexible connector, and the horizontal lines are divided into 50 lines and driven at a duty of 1/50. However, in a display where the number of pixels can be reduced, it is possible to reduce the number of liquid crystal display bodies or the number of flexible connectors to be taken out. Further, the light source 13 can be a fluorescent lamp of the length of the display device.

FIG. 3 is a plan view of a film liquid crystal display forming the present invention, in which 15 is a lower film membrane, 16 is a horizontal transparent electrode group, and 18', 19, and 20 are 3 electrodes, respectively.
It is a vertical transparent electrode that corresponds to the color filter of the primary colors, and a total of 100 horizontal electrodes are running, and a total of 6'50 x 3 colors = 1950 vertical electrodes are running. However, since it is driven at a duty of 1/50, the vertical electrodes are separated into upper and lower parts at the center 18 and drawn out.

17 is the upper film membrane. Since the horizontal electrodes run as a single line from right to left, they are wired at the ends of the display using 7-lexiple connectors similar to those shown in FIG.

FIG. 4 is a cross-sectional view of a single film liquid crystal display whose end face is folded into a U-shape, where 21 corresponds to the sealing part, 22 the layer of liquid crystal material, and 25 the vertical transparent electrodes in FIG. 6. . As can be seen in Figure 4, if the liquid crystal display becomes thinner, the influence of the sealing part can be eliminated by bending it. Figure 5 is an enlarged view of the transparent electrode of the display pixel.
27 is a vertical electrode, and 28 to 29 are horizontal electrodes. Since the aspect ratio of a TV screen is 3:4, the value of a:b is approximately 1.
: A value close to 1.

FIG. 6 is an enlarged view of the cross-sectional structure of the display body. 6
0 and 37 are front and rear linear polarizing films.

Unlike the example in FIG. 2, in this case, the color filter layer 31
is formed in front of the film membrane 32, so that
Since alignment with the display electrodes 36 is easy, the image quality is improved. 64 is a liquid crystal material, 35 is a horizontal electrode, and 66 is a rear film membrane.

As described above, the large liquid crystal display device of the present invention has a relatively planar structure and can be constructed in one piece, so it is suitable for displaying on large flat TVs, etc., and the seal portion does not appear on the display surface. Because there is no screen, the display image quality is extremely improved, and the effect is significant.

[Brief explanation of the drawing]

FIG. 1 shows a display surface of an embodiment of a large-sized liquid crystal display device of the present invention. 1.Front film substrate 2.Rear film substrate 3.Sealing seal portion 4.Assembling FIG. 2 is a cross-sectional structural diagram of an embodiment of the large-sized liquid crystal display device of the present invention. 5... Transparent board 6... Color filter film 7.8... Linear polarizing film 9... Pressing plate 10...
Fixture 11...Reflection board 12...Circuit board 16...Light source Fig. 3 is a plan view of the film liquid crystal display unit, Fig. 4 is its folded sectional view◇Fig. 5: FIG. 6 is an enlarged view of the display electrode, and FIG. 6 is an enlarged view of the cross-sectional structure of the film liquid crystal display. 30.37...Linear polarizing film 31...Color filter single layer 32.375...Film film 33.35...Display electrode 34...Liquid crystal or higher Applicant Suwa Seikosha Co., Ltd. Agent Patent attorney Mogami Work habits 1 Figure 2 Figure 31 1

Claims (1)

[Claims] 1. Transparent electrodes are formed on the upper and lower plastic films, and a plurality of film-like liquid crystal displays with liquid crystal material sealed between them are bent into a U-shape or an L-shape and assembled, so that the band of the liquid crystal sealing part covers the display screen. A large liquid crystal display device characterized in that it is configured so that it does not substantially cover the effective display surface.