JPH10274943A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a liquid crystal panel on a backlight frame so as to improve impact resistance against impact force exerted from the outside by mounting a dummy substrate on the side of the long side of the liquid crystal panel where a source driving circuit part is not mounted and screwing and fixing the dummy substrate on the backlight frame. SOLUTION: A source TCP 5 where a driver IC is packaged by a TAB system is mounted on the side of one long side of the liquid crystal panel 1 and connected to a source bus substrate 6, which is fixed on the backlight frame 7 through screws 8. A dummy TCP 9 which is not electrically connected is mounted on the side of the other long side of the panel 1 and mechanically connected to the dummy substrate 10. The corner parts of the substrate 10 are fixed at two spots on the backlight frame 7 through the screws 11. Thus, even when the force is exerted from the outside, movement to exert the force on a gate TCP 3 is restrained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a liquid crystal display device. More specifically, the present invention relates to, for example, a dot matrix type or active type liquid crystal display device including a liquid crystal panel (liquid crystal display circuit board), a circuit section (circuit module), and a backlight.

[0002]

2. Description of the Related Art As shown in FIG. 4, a liquid crystal display device generally comprises a liquid crystal panel 50 having a liquid crystal material sandwiched between two opposing glass substrates, and a circuit for driving the liquid crystal panel 50. And a backlight (not shown) disposed on the back surface of the liquid crystal panel 50. For example, in an active liquid crystal display device, the circuit unit receives a signal from a source electrode wiring and a gate electrode wiring around the liquid crystal panel 50 and drives a TFT (thin film transistor) built in the liquid crystal panel 50. TCP (Tape Carrier Packa)
ge) 51 and the TCP 52 for the gate, and their respective TCs
It comprises a source bus substrate 53 and a gate bus substrate 54 for supplying a power supply voltage, a ground voltage, a video signal, and the like to P.

In the source driving circuit section, the source bus board 53 is mounted on the long side of the liquid crystal panel 50.
Are fixed to the backlight frame 55 by screws 56. At this time, the source bus board 53 is
It is connected to the liquid crystal panel 50 via the CP 51. For this reason, the source bus board 53 is
5 means that the liquid crystal panel 50 is fixed to the backlight frame 55.

In such a liquid crystal display device, the source drive circuit is mounted on only one of the long sides of the liquid crystal panel 50. However, the source bus substrate is arranged on the back of the backlight using a folding TCP. can do.

[0005] One long side of the liquid crystal panel on which the source drive circuit is mounted is fixed against impact force or the like externally applied to the liquid crystal display device, thereby providing impact resistance.

In order to further improve the shock resistance, a structure in which the long side of the liquid crystal panel on which the source drive circuit section is not mounted is fixed to a backlight frame with a double-sided tape or silicone resin is sometimes used.

[0007]

However, in the liquid crystal panel of the above device, the other long side which is not fixed is moved by a force applied from the outside of the liquid crystal display device to apply a force to the TCP of the gate and the source. In addition, there is a problem that the wiring is broken at the connection portion between the liquid crystal panel and the TCP and between the TCP and the bus board.

A structure for fixing a liquid crystal panel and a backlight frame using a double-sided tape or a silicone resin is as follows.
It is very difficult to disassemble it.
When a mechanical failure occurs, there is a problem that it cannot be disassembled and repaired.

Further, the structure for fixing the liquid crystal panel and the backlight frame with a double-sided tape or a silicone resin requires investment such as introduction of a new device or arrangement of personnel.

In view of the circumstances described above, the present invention provides a liquid crystal display device which has high durability against external forces, can be easily disassembled, and does not require the introduction of a new device. The purpose is to do.

[0011]

In a liquid crystal display device according to the present invention, a source drive circuit is mounted on one long side of a liquid crystal panel, and a source bus substrate of the drive circuit is fixed to a backlight frame. In the liquid crystal display device, the other long side of the liquid crystal panel is connected to the backlight frame by detachable support means.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display device according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an explanatory view showing one embodiment of the liquid crystal display device of the present invention, FIG. 2 is a right side view of the liquid crystal panel in FIG. 1, and FIG. 3 is another embodiment of the liquid crystal display device of the present invention. FIG.

The liquid crystal display device of the present embodiment is shown in FIGS.
As shown in FIG. 1, an active matrix type liquid crystal display device includes a liquid crystal panel 1, circuit sections 2a and 2b, and a backlight. Panel 1 shows TAB (Tape A
A gate TCP 3 on which a driver IC is mounted is mounted by a utomated bonding method, and the gate TCP 3 is electrically connected to the gate bus substrate 3. The liquid crystal panel 1
A liquid crystal material is sandwiched between a color filter substrate and a TFT substrate. Also, on one long side of the liquid crystal panel 1, a source T on which a driver IC is mounted in a TAB method is mounted.
The CP 5 is mounted and connected to the source bus board 6. The source bus board 6 is fixed to a frame 7 of the backlight by screws 8.

Although the function as a liquid crystal display device can be realized by the above configuration, in the present embodiment, a dummy TCP 9 which is not electrically connected to the liquid crystal panel 1 is mounted and the dummy TCP 9 is mounted.
The CP 9 and the dummy substrate 10 are mechanically connected. The dummy substrate 10 has two corners fixed to the backlight frame 7 with screws 11.

As described above, the liquid crystal panel 1 has its two long sides fixed to the backlight frame via the TCP and the substrate by the screws, and the liquid crystal panel 1 moves so as to apply a force to the gate TCP3 even when a force is applied from the outside. Can be suppressed.

If it is necessary to disassemble, the liquid crystal panel 1 and the backlight frame 7 can be easily separated by removing the screwed portion.

In the present embodiment, the liquid crystal panel is connected to the backlight frame by means of dummy substrate and dummy TCP support means. However, the present invention is not limited to this. Can also be connected.

While it is required to increase the size of the display screen, it is required to reduce a portion called a picture frame such as a circuit portion mounted on the periphery of the liquid crystal panel. Since the dummy substrate has no electrical role and is screwed to the backlight frame, there is flexibility in setting the substrate width. Therefore, it is possible to respond to a demand for narrower frame.

If a narrower frame is required, a folding TCP can be used as shown in FIG. That is, the source TCP 21 on which the driver IC is mounted is mounted on the TFT substrate 20 by the TAB method, and the source TCP 21 is bent at the edge of the backlight frame 22 and is electrically connected to the source bus substrate 23. A dummy TCP 24 having no electrical role is mounted on the TFT substrate 20, and the dummy TCP 24 is also bent at the edge of the backlight frame 22 and is mechanically detachably connected to the dummy substrate 25. Further, the source bus substrate 23 and the dummy substrate 25 are provided with screws 2 on both sides thereof on the back surface of the backlight frame 22.
6 screwed. As described above, the present invention can cope with a demand for a narrower frame.

[0021]

As described above, according to the present invention,
Since the dummy substrate is mounted on the long side of the LCD panel where the source drive circuit is not mounted, and the dummy substrate is screwed to the backlight frame, the liquid crystal panel is fixed to the backlight frame. Impact resistance against an impact force applied from the outside.

Further, since the liquid crystal panel and the backlight frame in the present invention are fixed by screws, for example, the liquid crystal panel is disassembled in comparison with a structure in which the liquid crystal panel is fixed to the backlight frame with a double-sided tape or silicone resin. And repair can be facilitated.

Further, by connecting the dummy TCP to the liquid crystal panel and the dummy TCP to the dummy substrate with the same ACF (Anisotropic Conductive Film) connection as the TCP mounting of the source and the gate, the mounting device in use can be used. There is no need for a new purchase.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of a liquid crystal display device of the present invention.

FIG. 2 is a right side view of the liquid crystal panel in FIG.

FIG. 3 is an explanatory diagram showing another embodiment of the liquid crystal display device of the present invention.

FIG. 4 is an explanatory view showing a conventional liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2a, 2b Circuit part 3 Gate TCP 4 Gate bus board 5 Source TCP 6 Source bus board 7 Backlight frame 8, 11 Screw 9 Dummy TCP 10 Dummy board

Claims (6)

[Claims] 1. A liquid crystal display device comprising: a source driving circuit portion mounted on one long side of a liquid crystal panel; and a source bus substrate of the driving circuit portion fixed to a backlight frame. A liquid crystal display device wherein the other long side of the panel is connected to the backlight frame by detachable support means. 2. The liquid crystal display device according to claim 1, wherein said support means is a dummy substrate having no electrical role. 3. The liquid crystal display device according to claim 2, wherein the liquid crystal panel and the dummy substrate are connected via a film. 4. The liquid crystal display device according to claim 3, wherein the film is made of the same material as a TCP film carrier on which a driver IC is mounted. 5. The liquid crystal display device according to claim 4, wherein said TCP is a folding TCP. 6. The liquid crystal display device according to claim 2, wherein the dummy substrate is fixed to the backlight frame with screws.