JPH1062806A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a liquid crystal display panel by eliminating a stage for bending a connecting member (FPC) conducted and adhered to this panel, improving this connecting member so as obviate the occurrence of the cracks and cuts in the bent part and overlaping the liquid crystal display panel on a control board by part so as not to increase a plane area. SOLUTION: The connecting member 6 is provided with thin parts 7a, 7b having reversibility. The liquid crystal panel 1 and the control board 10 are connected by the connecting member 6. When the juncture of the control board 10 is so arranged as to overlap on the juncture of the liquid crystal panel 1, the thin parts 7a, 7b bend naturally. The connecting member 6 is composed of FPC or FFC. The thin parts are constituted by preparing solid patterns 16 connected the ground in addition to patterns 15 for wirings and cutting off part of these solid patterns 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to miniaturization of liquid crystal display devices and improvement of reliability of connection members.

[0002]

2. Description of the Related Art A liquid crystal display device, here a small portable liquid crystal T
V, the connection member 51 connected to the liquid crystal display panel 50 by conductive bonding as shown in FIG.
The liquid crystal display panel 50 and the circuit board 52 are bent at substantially right angles for convenience of assembly and space, and are connected to a circuit board 52 arranged below the liquid crystal display panel 50. In between, the liquid crystal display panel 5
A backlight 53 serving as a light source for the circuit board 5
2, the circuit board 52 is vertically long, and the liquid crystal display panel 50 and the backlight 5
A power supply unit 54 serving as a power supply is disposed in the lower upper part, and a dry battery (not shown) is accommodated. A TV reception channel is provided between the liquid crystal display panel 50 and the power supply unit 53. A key switch block 54 for control is arranged, and the above components connected to the circuit board 52 are housed by upper and lower cases 55 and 56. The liquid crystal display panel 5 is mounted on the circuit board 52.
It is needless to say that a circuit for performing control of 0, a circuit for controlling reception of broadcast radio waves, a control circuit for the backlight 53, and a power supply circuit are mounted.

In another example, as shown in FIG. 7, in Example 2, a connecting member 61 connected to the liquid crystal display panel 60 by conductive bonding is used to control a panel disposed below the liquid crystal display panel 60. Liquid crystal display panel 6 connected to a control board 62 that performs
A main board 64 having a circuit for processing and controlling a video signal is disposed below the backlight 63. A power supply is disposed below the control board 62. Power supply unit 65
The control board 62 is provided with a switch 66 for controlling a TV receiving channel in addition to the control circuit of the liquid crystal display panel 60. Are housed in upper and lower cases 67, 68.

[0004]

However, in the conventional small portable liquid crystal TV, the connection member (FPC) electrically conductively bonded to the liquid crystal display panel is bent at a substantially right angle and connected to the circuit board in Example 1. Therefore, the FPC is a thin copper foil, and when it is bent, a crack is generated in the bent portion, and the bent portion is cut due to a change over time, an impact, or the like. was there.

In Example 2, the liquid crystal display panel and the control board are arranged substantially in parallel and connected by a connecting member. In this configuration, the liquid crystal display panel and the control board are arranged in parallel, so that the flat area becomes large and the small portable liquid crystal is used. There was a problem that the TV could not be downsized.

In view of the above, the present invention provides a liquid crystal display device in which a thin portion is formed in a connecting member so that the thin portion is automatically bent, there is no disconnection due to bending, and there is no fear of causing poor conduction. The purpose is to:

Another object of the present invention is to provide a liquid crystal display device having a reduced plane area and a reduced size by arranging a part of the liquid crystal display panel and a part of the control board so as to overlap each other. .

[0008]

According to a first aspect of the present invention, there is provided a liquid crystal display device comprising: a connecting member having a plurality of easily bendable portions; connecting the liquid crystal display panel to a control board with the connecting member; It is arranged so as to overlap the connection part of the liquid crystal display panel. As a result, the easily bendable portion of the connection member is naturally bent and can be mounted in a small space.

A liquid crystal display device according to a second aspect is characterized in that a thin portion is provided as a portion that is easily bent.

In the liquid crystal display device according to the present invention, the connecting member is formed of FPC or FFC, a solid pattern connected to GND is prepared in addition to the wiring pattern, and a part of the solid pattern is deleted. Characterized in that a thin wall portion is formed.

[0011]

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

(Embodiment 1) FIG. 1 is a front view showing an embodiment of a liquid crystal display (small portable liquid crystal TV) according to the first and second aspects of the present invention. FIG. 2 is a sectional view of a main part in FIG. FIG. 3 is a partially enlarged view showing a state in the middle of assembling in which the liquid crystal display panel of FIG. 2 and a control board are connected by a connecting member. FIG. 4 is a partially enlarged view showing a state where the apparatus is assembled from the state shown in FIG. FIG. 5 is an enlarged view showing a state where a thin portion of the connection member is formed. To explain the configuration,
Reference numeral 1 denotes a liquid crystal display panel, which is positioned and locked on one surface of a panel fixing frame 2, and has a backlight block 3 serving as a light source of the liquid crystal display panel 1 on the other surface of the panel fixing frame 2. These are arranged and housed by shield plates 4a, 4b formed of a metal material, and
A connecting member 6 (here, an FPC is taken as an example, but a connecting connector made of a foil such as FFC is the same as that of the first embodiment). The connecting member 6 is partially provided with thin portions 7a and 7b having reversibility. A circuit board 8 is arranged below the panel block 5. A control board 10 having a circuit (not shown) for controlling an image on the liquid crystal display panel 1 and a switch 9 for controlling a reception channel of a broadcast radio wave is disposed below the liquid crystal display panel 1. A knob 11, a part of which protrudes outward, is arranged so as to correspond to the switch 9, so that channel operation can be performed from the outside. A dry battery serving as a power supply block 12 is disposed below the control board 10 and is connected to the circuit board 8 via a connection spring (not shown). It is stored and held by the case 14. The connection member 6 conductively connected to the liquid crystal display panel 1 is collectively soldered to the control board 10 or connected by a connector. Needless to say, the control board 10 is connected to the circuit board 8 and The circuit board 8 is provided with a circuit for controlling the reception of broadcast radio waves and processing video and audio, and a circuit (not shown) for processing power supplied from the power supply block 12. Here, the order of assembling the components will be described. First, as a preparatory operation, the connection member 6 conductively connected to the liquid crystal display panel 1 is connected to the control board 10. , The panel block 5 is mounted on the upper part, and the rear case 14 is screwed (not shown).
Then, the control board 10 is assembled so that the control board 10 and the connecting portion 17b of the connecting member 6 are sunk under the connecting portion 17a of the liquid crystal display panel 1 and the connecting member 6, and is fixed to the back case 14 with screws. At this time, since the reversible thin portions 7a and 7b of the connecting member 6 are naturally bent, it is not necessary to perform bending and to assemble while applying stress to the thin copper foil. Here, the control board 10 is assembled so that a part of the control board 10 overlaps the liquid crystal display panel 1, so that the plane area can be reduced and the size can be reduced. The connecting member 6 applies the stress caused by the assembly of the control board 10 to the thin portions 7a,
Since 7b absorbs by bending naturally, no trouble such as cutting occurs.

The method of forming the thin portions 7a and 7b of the connecting member 6 will be described. The reversibility of the conventional FPC is well known, but when there is a noise source around the FPC, it is formed of copper foil. It is often the case that a solid pattern 16 connected to GND is provided on both sides or one surface of the wiring pattern 15, however, the copper foil is hardly deformed when it has two or three layers, and loses the reversibility inherent in the FPC. That is, when stress is applied at the time of assembling, the parts become difficult to use. Therefore, as shown in FIG.
b is formed.

According to the above configuration, the thin portions 7a,
7b is realized by deleting the existing solid pattern 16, so that it is possible to configure without increasing the cost. In addition, the bending position is not required, and the assembly is simplified, and the reliability is ensured by the stressed position being a reversible thin portion. In the embodiment, a thin portion is provided to bend naturally. However, for example, it is possible to make the connection member easy to bend by changing a material of a portion to be bent of the connecting member.

[0015]

As described above, according to the liquid crystal display device of the present invention, since the liquid crystal display panel and the control board are arranged so as to overlap with each other, the flat area of the liquid crystal display device can be reduced and the size of the small portable liquid crystal TV can be reduced. It can contribute. In addition, by providing the connecting member with the thin portion, the habit forming process at the time of assembling is eliminated. In addition, since the connecting member bends more naturally than the thin portion, stress concentration does not occur, and the effect of preventing disconnection can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part in FIG.

FIG. 3 is a partially enlarged view showing a state during assembly in which the liquid crystal display panel of FIG. 2 and a control board are connected by connecting members.

FIG. 4 is an enlarged view showing a state where it is assembled from the state shown in FIG. 3;

FIG. 5 is an enlarged view showing a state where a thin portion of the connection member is formed.

FIG. 6 is a sectional view of a main part of a conventional liquid crystal display device (small portable liquid crystal TV).

FIG. 7 shows another conventional liquid crystal display device (small portable liquid crystal TV).
It is principal part sectional drawing of.

[Explanation of symbols]

 1. Liquid crystal display panel 2. Panel fixing frame 3. Backlight block 4a, 4b. Shield plate 5. Panel block 6. Connection member 7a, 7b. Thin part 8. Circuit board 9. Switch 10. Control board 11. Knob 12. Power supply block 13. Table case 14. Back case 15. Wiring pattern 16a, 16b. Solid pattern 17a, 17b. Connection

Claims (3)

[Claims] 1. A liquid crystal display device comprising: a liquid crystal display panel; a control board on which a circuit for controlling the liquid crystal display panel is mounted; and a connection member for connecting the liquid crystal display panel and the control board.
Providing a plurality of easily bendable portions in the connection member,
A liquid crystal display device, wherein a connection part of the control board is arranged so as to overlap a connection part of the liquid crystal display panel. 2. The liquid crystal display device according to claim 1, wherein a plurality of thin portions having reversibility are provided on the connecting member. 3. A thin-walled portion formed by forming the connecting member by FPC or FFC, preparing a solid pattern connected to GND in addition to the wiring pattern, and deleting a part of the solid pattern. The liquid crystal display device according to claim 2, wherein: