JPH0640990U - Fixing structure of flexible wiring board in liquid crystal display device - Google Patents

Abstract

(57) [Abstract] [Purpose] A flexible wiring board fixing structure in a liquid crystal display device capable of fixing the flexible wiring board to the main body case so that the pulling force of the flexible wiring board does not affect the internal connection portion. provide. [Structure] A liquid crystal display panel 4 is fixed in a main body case 1 composed of a front case 2 and a rear case 3, and first and second TAs are attached to respective electrode terminals 5 and 6 of the liquid crystal display panel 4.
B packages 8 and 9 are connected to each TAB package 8,
Two holes 16 are provided in the flexible wiring board 13 that is connected to 9 and extends to the outside of the main body case 1, and the two protrusions 17 provided in the rear case 3 are inserted into each hole 16 of the flexible wiring board 13. , Front case 2
The protrusions 18 provided in the above are made to correspond to the vicinity of the peripheries of the protrusions 17, and the protrusions 18 press the vicinity of the peripheries of the holes 16 of the flexible wiring board 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for fixing a flexible wiring board in a liquid crystal display device.

[0002]

[Prior art]

 Liquid crystal display devices used in electronic equipment have a liquid crystal display panel fixed in a main body case, and TAB packages are connected to the scanning electrode terminals and the signal electrode terminals of the liquid crystal display panel, respectively. A circuit board is connected and fixed in the main body case, a flexible wiring board is connected to this circuit board, and this flexible wiring board extends out from the main body case and is connected to the electronic device main body. There is. The TAB package is a semiconductor chip mounted on a film by a TAB (Tape Automated Bonding) technique. A flexible wiring board is one in which wiring leads made of a metal foil such as copper are formed on the surface of a base film. In such a liquid crystal display device, since the circuit board is connected to the TAB package and the flexible wiring board is connected to the circuit board, there is a problem that the number of parts is large and the connection work is complicated. Therefore, conventionally, it has been considered to directly connect the flexible wiring board to the TAB package without using the circuit board to reduce the number of components.

[0003]

[Problems to be solved by the device]

 However, in a liquid crystal display device in which a flexible wiring board is simply connected to a TAB package, when the flexible wiring board is pulled or the main body case is hung by the flexible wiring board, the pulling force is applied to the flexible wiring board and the TAB. Since it is added to the connecting portion with the package or the connecting portion with the TAB package and the liquid crystal display panel, there is a problem that these connecting portions cause connection failure. The purpose of this invention is to provide a structure for fixing a flexible wiring board in a liquid crystal display device that can securely fix the flexible wiring board in the main body case so that the pulling force of the flexible wiring board does not affect the internal connection part. It is to provide.

[0004]

[Means for Solving the Problems]

 This invention has a main body case composed of a front case and a rear case, a liquid crystal display panel fixed in the main body case, a TAB package connected to the electrode terminals of the liquid crystal display panel, and a connection to the TAB package. And a flexible wiring board that extends outside the main body case, and a plurality of holes are provided at predetermined locations on the flexible wiring board in the main body case. Each of the holes is provided with a plurality of protrusions, and the other case of the main body case is provided with a plurality of protrusions for pressing the periphery of each hole of the flexible wiring board in correspondence with the periphery of each protrusion. It is provided.

[0005]

[Action]

 According to this invention, the plurality of protrusions provided on one case of the main body case are respectively inserted into the plurality of holes of the flexible wiring board, and the plurality of protrusions provided on the other case of the main body case are provided. Since the area around each hole of the flexible wiring board is pressed in correspondence with the area around each of the projections on the flexible wiring board, even if the flexible wiring board is pulled, the pulling force is received by the projections and projections on the main body It will be stopped and each connection inside the case will not be affected.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In these figures, 1 is a main body case. The main body case 1 is composed of a front case 2 and a rear case 3, and is configured to have a thin box shape as a whole. A liquid crystal display panel 4 is arranged in the main body case 1 as shown in FIG. The liquid crystal display panel 4 has a pair of transparent glass substrates on which opposing transparent electrodes are provided orthogonal to each other, and a liquid crystal material is sealed between the pair of glass substrates. One glass substrate is placed on the right side. The signal electrode terminal 5 is provided on the projected portion, and the other glass substrate is projected downward, and the scanning electrode terminal 6 is provided on the projected portion. The liquid crystal display panel 4 is adhered to the inner surface of the rear case 3 with a double-sided adhesive tape (not shown) on the back surface in a state corresponding to the display window 7 of the front case 2.

The signal electrode terminals 5 of the liquid crystal display panel 4 are electrically connected to the connection terminals 8 a of the first TAB package 8, and the scanning electrode terminals 6 are connected to the connection terminals of the second TAB package 9. The part 9a is electrically connected. In this case, each of the TAB packages 8 and 9 has the IC chip 11 bonded to the lead pattern (not shown) of the film 12 by the TAB technique, and mounted on the right side of the film 12 of the first TAB package 8. The external connection terminal portion 8b is provided in the lower portion, and the external connection terminal portion 9b is provided in the lower right portion of the film 12 of the second TAB package 9.

The external connection terminal parts 8b and 9b of the first and second TAB packages 8 and 9 are electrically connected to the connection parts 14 of the flexible wiring board 13, respectively. As shown in FIG. 2B, the flexible wiring board 13 has a wiring lead 13b formed on the surface of a base film 13a, and the wiring lead 13b is connected to each connection portion 14. Further, the flexible wiring board 13 is extended to the outside of the main body case 1 as shown in FIG. 1 while being connected to the first and second TAB packages 8 and 9, and is extended. The tip end side connecting portion 15 is connected to an electronic device body (not shown).

Two holes 16 are provided at predetermined positions of the flexible wiring board 13 in the main body case 1, that is, at positions extending from the main body case 1 to avoid the wiring leads 13b. Further, as shown in FIG. 2B, the rear case 3 is provided with hollow protrusions 17 which are inserted into the holes 16 of the flexible wiring board 13. Further, the front case 2 is provided with hollow protruding portions 18 corresponding to the periphery of the protrusions 17 of the rear case 3 and pressing the periphery of the holes 16 of the flexible wiring board 13 in a ring shape. Has been.

In such a liquid crystal display device, as shown in FIG. 2A, a liquid crystal display panel 4 is adhered inside a rear case 3, and each of the electrode terminals 5 and 6 of the liquid crystal display panel 4 is firstly bonded. The connection terminal portions 8a and 9a of the first and second TAB packages 8 and 9 are connected, and the flexible wiring board 13 is connected to the external connection terminal portions 8b and 9b of the first and second TAB packages 8 and 9, respectively. The flexible wiring board 13 is extended to the outside from the rear case 3, and the projections 17 of the rear case 3 are inserted into the holes 16 of the flexible wiring board 13 in this state. When the front case 2 is joined to the case 3 to assemble the main body case 1, the protrusions 18 continuously provided in a ring shape on the front case 2 correspond to the vicinity of each of the protrusions 17 of the rear case 3. As a result, the vicinity of each hole 16 of the flexible wiring board 13 is pressed down.

Therefore, the flexible wiring board 13 is securely and firmly fixed to the main body case 1 by the protrusions 17 and the protrusions 18. Therefore, even if the main body case 1 is hung by the flexible wiring board 13 or the flexible wiring board 13 is pulled, the pulling force is received by the protrusions 17 and the protrusions 18. Of each of the flexible wiring board 13 and the first and second TAB packages 8 and 9 and the connection portion of the first and second TAB packages 8 and 9 and the liquid crystal display panel 4 are pulled. Is not affected by. For this reason, there is no risk of connection failure at each connection portion, and a liquid crystal display device with high connection reliability can be obtained.

In the above-mentioned embodiment, the protrusion 17 and the protrusion 18 are formed in a hollow shape, but they do not necessarily have to be formed in a hollow shape. Further, although the protruding portion 18 is continuously formed in a ring shape, the present invention is not limited to this, and a plurality of protruding portions that press the vicinity of each hole 16 of the flexible wiring board 13 corresponding to the vicinity of the periphery of the protrusion 17 are provided. A ring-shaped arrangement may be used. Further, in the above-described embodiment, the protrusion 17 is provided on the rear case 3 and the protrusion 18 is provided on the front case 2. However, the present invention is not limited to this, and the protrusion 17 is provided on the front case 2 and the protrusion 18 on the rear case 3. May be provided.

[0013]

[Effect of device]

 As described above, according to the present invention, the plurality of protrusions provided on one case of the main body case are respectively inserted into the plurality of holes of the flexible wiring board and are provided on the other case of the main body case. Since the plurality of protrusions respectively press the vicinity of the periphery of each hole of the flexible wiring board in correspondence with the vicinity of each periphery of the plurality of protrusions, the flexible wiring board can be securely and firmly fixed to the main body case. Therefore, even if the flexible wiring board is pulled, the pulling force can be received by the protrusions and projecting parts of the main body case, and each connecting part in the main body case is not affected by the pulling force. A liquid crystal display device with high connection reliability can be obtained without the risk of connection failure at the connection portion.

[Brief description of drawings]

FIG. 1 is an external front view of a liquid crystal display device of the present invention.

2 (a) is a front view with a front case removed, and FIG. 2 (b) is an AA enlarged cross-sectional view of FIG.

[Explanation of symbols]

 1 Main Body Case 2 Front Case 3 Rear Case 4 Liquid Crystal Display Panel 5 Signal Electrode Terminals 6 Scanning Electrode Terminals 8 and 9 TAB Package 13 Flexible Wiring Board 16 Holes 17 Projections 18 Projections

Claims (1)

[Scope of utility model registration request] 1. A main body case including a front case and a rear case, a liquid crystal display panel fixed in the main body case, a TAB package connected to electrode terminals of the liquid crystal display panel, and a TAB package connected to the TAB package. And a flexible wiring board extending outside the main body case, a plurality of holes are provided at predetermined portions of the flexible wiring board in the main body case, and the flexible wiring board is provided in one case of the main body case. A plurality of protrusions that are respectively inserted into the plurality of holes of the board are provided, and the other case of the main body case presses the vicinity of the periphery of each hole of the flexible wiring board corresponding to the vicinity of the periphery of each of the plurality of protrusions. A flexible wiring board fixed in a liquid crystal display device characterized in that a plurality of protrusions are provided. Structure.