JPH048457Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a display device in which a display device in which a plurality of liquid crystal panels are arranged in series is arranged to form a large screen.

Conventionally, a large screen has been constructed using a display device as shown in, for example, Japanese Patent Application No. 57-204984. Figure 4~
FIG. 7 shows a display device according to this conventional example, FIG. 4 is a perspective view showing a display device according to the conventional example, and FIG. 5 is a perspective view showing a display device constituting the display device according to this conventional example. FIGS. 6 and 7 are cross-sectional views showing a conventional bonding state between a liquid crystal panel and a printed circuit board provided with a driving circuit thereof in a display according to this conventional example.

In the figure, 1 is a liquid crystal panel, which is composed of a transparent substrate 3 on the viewer 2 side, a transparent substrate 4 facing each other with liquid crystal molecules (not shown) in between, and a polarizing plate 5 pasted on the outside. has been done. Reference numeral 6 denotes the upper and lower ends of the transparent substrate 3 on the viewer 2 side, and electrodes 7 drawn out from the inside of the transparent substrate 3 are provided.
Reference numeral 8 denotes a connection board that is in contact with the upper and lower ends 6 and is provided with a drive circuit section that transmits signals to the liquid crystal panel 1;
A circuit pattern 9 is provided on a flexible film such as a polyimide resin film. 10 is the circuit pattern 9 on this connection board 8 and the transparent board 3
It is a connecting conductor that electrically connects the electrodes 7 provided on the upper and lower ends 6 of the . Further, reference numeral 11 indicates a pixel in the liquid crystal panel 1, which is the smallest unit of the screen. Reference numeral 12 denotes a case that contacts the edge of the transparent substrate 4 of the liquid crystal panel 1 and supports the liquid crystal panel 1, and is made of a metal plate with high reflectance such as aluminum. 13 is a light source of the liquid crystal panel 1.

A conventional liquid crystal display device is configured as described above.
In order to arrange the pixels 11 at constant intervals, each display device is arranged with the minimum interval between them.
In each display, there is a liquid crystal panel 1 in the case 12.
After fixing, one end of the connection board 8, which is also fixed to this case 12, is pressed against the upper and lower ends 6 of the liquid crystal panel 1, and the positions of the electrodes 7 on the upper and lower ends 6 and the circuit pattern 9 of the connection board 8 are adjusted. After aligning the positions, the connection substrate 8 and the liquid crystal panel 1 are electrically connected to each other by the connection conductor 10.

Regarding the method of butting the connection board 8 and the upper and lower ends 6 of the liquid crystal panel 1, as shown in FIGS. 6 and 7, after connecting the flexible connection board 8 to the upper and lower ends 6 in a plane, Conventionally, a method of bending (as shown in FIG. 6) and a method of connecting by bending the connection board 8 at right angles to the upper and lower ends 6 (as shown in FIG. 7) have been practiced.

[Problem that the invention attempts to solve]

Conventional display devices are constructed as described above, and in order to make each pixel 11 of the liquid crystal panel 1 constant in interval and as large as possible, the interval between the upper and lower ends 6 has gradually become narrower. Therefore, in FIGS. 6 and 7, the width for fixing the connection board 8 to the upper and lower ends 6 of the liquid crystal panel 1 becomes narrower, so the length of the bent portion becomes shorter, making it difficult to fold.
There was a problem that it was easy to peel off even after being bent. Furthermore, in the method shown in FIG. 5, since the width of the upper and lower ends 6 is narrow, the connection conductor 10 that is attached after the connection board 8 is butted is not sufficient, and the connection board 8
There was a problem in that it was easy to peel off from the upper and lower ends 6. Another problem was that a case 12 for supporting the connection board 8 and the liquid crystal panel 1 was required separately.
Further, due to the heat emitted by the light source 13, the case 12 supporting the liquid crystal panel 1 thermally expands, causing the problem that the liquid crystal panel 1 is likely to separate from the connection substrate 8.

This idea was made to solve the above-mentioned problems, and it supports the liquid crystal panel 1, and at the same time provides a circuit pattern on the end faces that abut the upper and lower ends 6 of the liquid crystal panel 1, so that it can be electrically connected. The display consists of a conductive case that can be easily connected to the liquid crystal panel, prevents the liquid crystal panel from peeling off due to the heat generated by the internal light source, and allows regular spacing between each pixel on adjacent displays. The purpose of this invention is to obtain a display device that can be used.

[Means for solving problems]

In the display device according to this invention, a liquid crystal panel driving circuit is provided on two opposing surfaces of a housing that supports a liquid crystal panel, and this housing is butted against an end portion of the liquid crystal panel having electrodes, and the butted end surfaces of the housing are The display device is provided with a conductor portion for electrically connecting the liquid crystal panel and its drive circuit.

[Effect]

The display device according to this invention has a driving circuit for driving the liquid crystal panel on the surface of a casing that supports the liquid crystal panel, and a driving circuit for driving the liquid crystal panel and the driving circuit for driving the liquid crystal panel on the end face of the casing that abuts against the end of the casing that has the electrodes of the liquid crystal panel. Since a conductor part is provided to connect the circuit,
It is possible to provide a display device using a display device that can be easily connected to a liquid crystal panel and can maintain sufficient strength.

〔Example〕

A display device according to a first embodiment of this invention will be explained below with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing the appearance of a display device constituting a display device according to a first embodiment of the invention, and FIG. 2 is a perspective view showing the details of FIG. It is. FIG. 3 is a perspective view showing the end face of the display casing. In the figure, 1 to 7, 9, 11, 13
are the same as or equivalent to each part in a conventional display. Reference numeral 14 denotes a casing that supports the display panel 1 of the display device, and has a trapezoidal cross section and is made up of two opposing plates, a first plate 15 and a second plate 16, and a first plate 15 and a second plate. Side plates 17 on both sides connecting the plates 16 of
A plate made of ceramic and having a low coefficient of thermal expansion, for example, is used. Reference numeral 18 denotes a stepped portion provided on the liquid crystal panel 1 side of the first plate 15 and the second plate 16, which is provided to match the shape of the transparent substrate 4 of the liquid crystal panel 1 and supports the liquid crystal panel 1. There is. 17 is this first plate 5 and second plate 16
A circuit pattern constituting a drive circuit for driving the liquid crystal panel 1 is attached thereon, and non-ferrous metals such as copper and aluminum are attached thereto. A conductor 18 is continuous with the circuit pattern 17 and is formed on the end surface 19 of the first plate 15 or the second plate 16, to which a conductive metal such as solder is attached. Further, 20 is a notch provided in the first plate 15 or the second plate 16 near the liquid crystal panel 1.

The display of the display device according to the first embodiment of this invention is constructed as described above, and a liquid crystal panel is mounted on the drive circuit pattern 17 provided on the first plate 15 and the second plate 16 of the housing 14. After mounting components such as ICs necessary for the circuit driving the liquid crystal panel 1, the liquid crystal panel 1 is fixed by the stepped portion 18 as shown in FIG. Next, the conductors 18 provided on the end surfaces 19 of the first plate 15 and the second plate 16 aligned with the positions of the electrodes 7 on the upper and lower ends 6 of the liquid crystal panel 1 are heated and melted, and the electrodes 7 and the circuit pattern 17 are heated and melted. conduction. At this time, as shown in the conventional example, if the connecting conductor 10 is attached,
It can be more securely fixed and conductive.

In addition, the liquid crystal panel 1 also has a light source 13 as in the conventional example.
However, since the case is made of, for example, a ceramic plate with a low coefficient of thermal expansion, it can withstand the heat generated by the light source 13.
The coefficient of thermal expansion is close to that of the glass plates that are the material of the transparent substrates 3 and 4 of the liquid crystal panel, and the bonded portions can follow thermal expansion in the same way, making the bonded portions difficult to peel off. In addition, this display has LCD panel 1
Since the housing 14 is provided with a notch 20 nearby, the notch 20 makes it easy to arrange the displays in a regular manner. , the housing 14 and the liquid crystal panel 1 come into contact, and the liquid crystal panel 1 is prevented from being chipped.

In addition, in the first embodiment of this invention, the housing 14
Although the example in which the conductor 18 is provided on the end surface 19 of the first plate 15 and the second plate 16 has been shown, as a second embodiment, the conductor 18 is provided near the end surface 19 of the first plate 15 or the second plate 16, Even if a lead frame made by bending a thin metal plate into a U-shape is connected to the circuit pattern 17, the liquid crystal panel 1 can simply be fixed to the housing 14, and the electrodes 7 of the liquid crystal panel 1 can be connected to the circuit through the lead frame. Can be easily electrically connected to the pattern.

Alternatively, as a third embodiment, the first plate 15
A conductor is printed on the end surface 19 of the second plate 16 by thick film printing to form a drive circuit pattern 17 of the liquid crystal panel 1.
Even when connected to the circuit pattern 17 of the drive circuit, the liquid crystal panel 1 can be easily electrically connected to the circuit pattern 17 of the drive circuit simply by fixing the liquid crystal panel 1 to the housing 14.

[Effect of idea]

As explained above, in the display device according to this invention, the liquid crystal panel drive circuit is provided on two opposing sides of the casing that supports the liquid crystal panel by abutting against the end portion having the electrodes of the liquid crystal panel, and the liquid crystal panel of the casing is Since a conductor part is provided to conductively connect the liquid crystal panel and its drive circuit on the end face that butts with the end having electrodes, it is easy to connect the edge of the liquid crystal panel and the case by simply fixing the liquid crystal panel to the case. This has the effect of providing a display device that is fixed and integrated, has a low coefficient of thermal expansion even with temperature changes, and is difficult to peel off at the part that is fixed to the liquid crystal panel.

In addition, on the surfaces of the first plate and the second plate of the case,
Since the circuit pattern of the drive circuit that drives the liquid crystal is provided, there is an effect that the connection board can be omitted.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a display device constituting a display device according to a first embodiment of the invention, and FIG.
FIG. 3 is a perspective view showing the details of the figure, and FIG. 3 is a perspective view showing end faces of the upper and lower plates of the display case according to the first embodiment. FIG. 4 is a perspective view showing a display device according to the conventional example, FIG. 5 is a perspective view showing a display device constituting the display device according to the conventional example, and FIG. 6 and FIG. , is a cross-sectional view showing a conventional bonding state between a liquid crystal panel and a printed circuit board provided with a driving circuit thereof. In the figure, 1 is a liquid crystal panel, 6 is an upper and lower end surface, and 7 is a liquid crystal panel.
is an electrode, 15 is a first plate, 16 is a second plate, 17
18 is a conductor, and 19 is an end surface. The same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A liquid crystal panel having transparent substrates facing each other with liquid crystal molecules in between, and electrodes drawn out from each pixel provided at the upper and lower ends, and a liquid crystal panel on the back side of the liquid crystal panel. A casing made of a plate with a low coefficient of thermal expansion that supports a liquid crystal panel and has a liquid crystal panel drive circuit on two opposing sides, and an end face of this casing that butts the top and bottom ends of the liquid crystal panel. What is claimed is: 1. A display device, characterized in that the display device comprises a conductor portion that conductively connects a liquid crystal panel and a drive circuit. (2) The display device according to claim 1 of the utility model registration, characterized in that a lead frame connected to a liquid crystal panel drive circuit is provided as a conductor portion on an end face that abuts the upper and lower ends of the liquid crystal panel. (3) The display device according to claim 1 of the utility model registration claim, characterized in that a thick-film printed conductor connected to a liquid crystal panel drive circuit pattern is provided as a conductor portion on an end surface that butts against the upper and lower ends of the liquid crystal panel. .