JP2991052B2 - Liquid crystal display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device used as a display of a liquid crystal television or a personal computer.

[0002]

2. Description of the Related Art In recent years, liquid crystal display devices have been required to be further reduced in size due to the trend toward smaller and lighter electronic devices on which the devices are mounted. In particular, how to reduce the area of the frame portion excluding the image display area from the area of the liquid crystal display device and how to reduce the thickness of the entire liquid crystal module are issues.

[0003] The structure of a conventional liquid crystal display device will be described below. FIG. 6 shows a configuration of a conventional liquid crystal display device. In FIG. 6, reference numeral 1 denotes a liquid crystal panel, and reference numerals 2 and 3 denote tape carrier packages (hereinafter referred to as TCP) connected to striped electrodes provided on the outer edge of the liquid crystal panel, and are the same as the panel surface in the X and Y directions. It is arranged on a plane. The liquid crystal panel driving LSI 6 is mounted on TCPs 2 and 3, and printed circuit boards 4 and 5 for signal supply are connected to the TCPs 2 and 3, respectively. The printed boards 4 and 5 are connected to each other by a cable 7.
Further, the housing 8 and the frame 9 support and fix these members.

However, in this state, the mounting plane area becomes large, and as shown in FIG.
The mounting area is reduced by adopting a configuration in which is bent in two steps. That is, the frame area other than the panel display surface in the liquid crystal module is reduced.

[0005]

However, in the conventional structure shown in FIG. 7, the area of the frame other than the image display area of the liquid crystal module can be reduced, but the thickness of the liquid crystal module is increased. The problem that occurs.

Further, in this structure, it is necessary to connect a cable for connecting the printed boards on the X and Y sides after bending the printed board. In this case, at least one end in the connection between the printed board and the cable,
It is necessary to connect the cable with the printed board standing upright on the liquid crystal panel. In this case, if soldering is performed, there is a problem that workability is poor. It is also possible to use a connector that can be attached to and detached from the printed board. However, in this case, the area of the printed board and the frame is increased by the extra capacity of the connector, and the cost increases. There is.

On the other hand, since the force to return to the original open state acts on the folded TCP and the printed board, the housing and the printed board are fixed with an adhesive or between the printed board and the frame. Means such as arranging and holding the spacers are required, and there is a problem that the assemblability is very poor. Furthermore, when the frame is attached, there is a risk that the frame may damage or damage the printed board, the TCP, the cable, etc. due to the small area of the frame portion of the liquid crystal display device.

An object of the present invention is to solve the above-mentioned conventional problems with a simple structure, and to provide a liquid crystal display device which has a small frame area, is thin, and has good assembling workability.

[0009]

In order to achieve this object, a liquid crystal module according to the present invention comprises: a liquid crystal panel having a flexible tape carrier package connected in X and Y directions; Connected X
Side and Y-side printed boards, a cable for connecting the X-side printed board and the Y-side printed board, and a casing for supporting the liquid crystal panel and the printed board, and a tape carrier for either the X or Y side. The package and the printed board are bent at an acute angle with respect to the surface of the liquid crystal panel, and the other tape carrier package is bent at an obtuse angle.

The X side and the Y side on the same plane as the liquid crystal panel.
Side of the printed board is connected with a cable, the cable is X
It is housed inside the printed board that is bent at an obtuse angle between the side and the Y side.

The printed board bent at an obtuse angle and an acute angle with respect to the liquid crystal panel surface is held by a hook-shaped projection provided on the housing, with its position in the bending direction of the printed board being regulated.

[0012] Further, by a guide provided on the housing,
A cable connecting the X-side and Y-side printed boards is held in a storage space.

[0013]

With this configuration, the thickness of the entire liquid crystal display device can be made clearly smaller than in the case where the printed board is bent at 90 degrees. In addition, by bending the printed board at an acute angle, the mounting parts on the printed board and TC
Considering the thickness of the LSI on P, it is possible to make the frame narrower than in the case of bending at 90 degrees. On the other hand, those bent at an obtuse angle provide sufficient space inside the printed board to accommodate the cables connecting the printed boards.

Further, since the hook-shaped projection for fixing the printed board is provided on the housing, the printed board is easily fixed at a predetermined position by an operation of bending the printed board and hooking the hook.

Further, since the housing is provided with a guide for regulating the cable housed inside the printed board bent at an obtuse angle, the cable is securely housed by being pushed into the guide of the housing. .

[0016]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration of a liquid crystal display device according to the present invention. First, the X-side TCP is provided on the liquid crystal panel 11.
12, the TCP 13 on the Y side, and the printed board 1 on the X side
4 and the Y-side printed board 15 are connected to each TCP. LCD panel 11, TCPs 12, 13 and printed board 14,
15 are connected on the same plane, and TCPs 2 and 3 are provided with slits 16 so as to be bent in two steps. The X-side printed board 14 and the Y-side printed board 15 are connected by a flat cable 17 (hereinafter, referred to as FPC). When connecting the FPC 17, T
Since it is sufficient to position the FPC 17 with respect to the CP, the connection can be made relatively easily. Reference numeral 22 denotes a driving LSI.

The housing 18 is formed of a resin material.
It has a wall surface B that supports the X-side printed board 14 and a wall surface C that supports the Y-side printed board 15. The wall surface B on the X side is at an angle larger than 90 degrees with respect to the surface of the liquid crystal panel 11,
The wall C on the Y side is formed at an angle smaller than 90 degrees. As shown in FIG. 2, the angle formed by the wall surface C on the Y side and the liquid crystal panel surface is such that when the printed board 15 on the Y side is mounted so as to be in contact with the wall surface of the housing, the liquid crystal display device has a backlight or the like. The angle is set so that the space area required on the back side does not overlap with the end of the printed board.

As shown in FIG. 3, the angle formed by the wall surface B on the X side with respect to the liquid crystal panel surface is determined from the liquid crystal panel surface to the X side printed board 1.
The obtuse angle is set at an angle such that the height from the front end of No. 4 to the front end of the Y-side printed board 15 is approximately the same as the height from the liquid crystal panel surface to the front end of the Y-side printed board 15. On the X-side printed board 14, a connector 20 for connecting a cable 19 for inputting a signal to the liquid crystal display device is provided. Since the thickness of the connector 20 is greater than the thickness of the printed board 14, the X-side printed board 14 is replaced with the Y-side printed board 1 as shown in FIG.
When the angle is set at an acute angle with respect to the liquid crystal panel surface as in the case of 3,
Since the connector 20 and the cable 19 for signal input penetrate into the internal area on the back side of the liquid crystal display device, the backlight for the light source is incorporated in the liquid crystal display device, or the liquid crystal display device is used in a set such as a liquid crystal television. It becomes an obstacle when incorporating. Therefore, as shown in FIG. 3, it is necessary to set the wall surface B of the housing 18 so that the X-side printed board 14 forms an obtuse angle with the liquid crystal panel surface.

As shown in FIG. 3, holes 18a are formed at both ends of the wall surface B on the X side of the housing 18 by utilizing the space generated by setting the wall surface B at an obtuse angle.
The liquid crystal panel 11 is mounted on the housing 18 and the X-side printed board 14
After the Y-side printed board 15 is bent along the wall surface of the housing 18, the FPC 17 is stored in the hole 18 a of the housing 18. FIG. 5 shows a state in which the FPC 17 is folded and stored in the hole 18a of the housing 18 from the back side of the liquid crystal display device. FP made by bending a printed board
The slack portion of C17 is stored in hole 18a.

As shown in FIG. 2, hook-shaped projections 18b and 18c are formed on the Y-side wall surface C of the housing 8, and hook-shaped projections are similarly formed on the X-side wall surface B as shown in FIG. 18d,
18e is provided, and after the printed boards 14 and 15 are bent along the wall surface of the housing 18, they are fitted into these hook-shaped projections 18b to 18e and fixed. These projections 18b to 18e serve to fix the printed boards 14 and 15 to the housing 18 and at the same time to regulate the position of the printed boards, so that a load is applied to the TCPs 12 and 13 when performing the work of bending the printed boards. There is no. Further, the X-side printed board 14 also has a function of preventing an excessive load from being applied to the TCP 12 when the signal input cable 19 is attached to and detached from the connector 20.

A rib 18f is provided at the corner of the housing 18 where the hole 18a for accommodating the FPC 17 is provided, so as to surround the hole 18a as shown in FIG. When storing the FPC 17 in the hole 18a of the housing 18,
The FPC 17 is pushed into the inside of the rib 18f so that the once stored FPC 17 does not come out of the hole 18a again.

After that, the metal frame 21 is attached to complete the liquid crystal display device. The hook-shaped projections 18b to 18e provided on the housing 18 serve to protect the printed boards 14 and 15, and the ribs 18f at the corners serve as the FPCs 17.
When the frame 21 is attached, there is no fear that the edges of the frame 21 may be damaged by contacting the printed boards 14 and 15 and the FPC 17.

The projections 18b-1 for fixing the printed board described above.
8e and a rib 18 for preventing the FPC from jumping out of the hole.
f can be easily formed by partially changing the shape of the housing 18 which is a plastic molded product, and does not require any other parts.

In the above embodiment, the case where the X side of the printed board is bent at an obtuse angle and the Y side is bent at an acute angle has been described. However, according to the design of the liquid crystal panel and the liquid crystal display device, the X side is formed at an acute angle and the Y side is formed at an acute angle. It is also possible to adopt a configuration in which the side is bent at an obtuse angle.

Regarding the bending angle of the printed board on the X and Y sides, an optimum angle may be set in consideration of the size of the entire liquid crystal display device and the size of the liquid crystal panel, printed board, and FPC.

[0027]

As is apparent from the above description, according to the present invention, in the liquid crystal display device, the tape carrier and the printed board on either the X or Y side are bent at an acute angle to the liquid crystal panel surface and the other is bent at an obtuse angle. By doing so, the area of the frame portion can be reduced and the thickness of the entire liquid crystal display device can be reduced, and the cable connecting the X-side printed board and the Y-side printed board is printed at an obtuse angle. Since the connection cable can be housed inside the plate, the connection cable can be connected in advance on the same plane as the liquid crystal panel, and the assemblability of the liquid crystal display device is significantly improved.

Also, the provision of the hook-shaped projections for fixing the printed board on the housing allows the printed board to be fixed in a bent state without using an adhesive or the like, thus assembling and disassembling operations. There is an advantage that the performance is improved. Further, since the hook-shaped projection also plays a role of protecting the printed board, it is possible to solve the problem that the printed board or the TCP is easily damaged by a frame or the like during assembly because the area of the frame portion is small.

Further, the cable connecting the X-side and Y-side printed boards can be easily and reliably connected to the liquid crystal display device by the space of the housing formed inside the printed board bent at an obtuse angle and the guide at the corner. Can be stored inside.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a shape of a housing in the embodiment.

FIG. 3 is a partial cross-sectional view showing a shape of a housing in the embodiment.

FIG. 4 is a partial cross-sectional view showing the shape of the housing in the embodiment.

FIG. 5 is a perspective view showing a shape of a housing in the embodiment.

FIG. 6 is an exploded perspective view showing a configuration of a conventional liquid crystal display device.

FIG. 7 is a partial perspective view showing a configuration of a conventional liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Liquid crystal panel 12, 13 TCP 14, 15 Printed board 17 Cable 18 Housing 18a Hole 18b, 18c, 18d, 18e Projection 18f Rib

Claims (4)

(57) [Claims] 1. A liquid crystal panel having a flexible tape carrier package connected in the X and Y directions, an X-side and a Y-side printed board connected to the tape carrier package, and an X-side printed board. A cable for connecting a Y-side printed board, and a housing for supporting the liquid crystal panel and the printed board, and the tape carrier package and the printed board on either the X or Y side are bent at an acute angle to the liquid crystal panel surface. Wherein the other tape carrier package and the printed board are bent at an obtuse angle. 2. The cable according to claim 1, wherein the cable connecting the X-side and the Y-side printed boards is housed inside the printed board bent at an obtuse angle between the X-side and the Y-side. Liquid crystal display. 3. The liquid crystal display device according to claim 1, wherein a position of the printed board in a bending direction of the printed board is regulated and held by a hook-shaped projection provided on the housing. . 4. The liquid crystal display device according to claim 2, wherein a cable connecting the printed boards on the X and Y sides is held in a storage space by a guide provided on the housing.