JPH10232625A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device constituted to allow the easy removal of a metallic case for protection fixed by double coated adhesive tapes without the failure of the glass substrate and driver IC in a liquid crystal panel. SOLUTION: The rear surface metallic case 2 fixed by the double coated adhesive tapes 4 to the liquid crystal panel is provided with holes 7 within the adhesive surfaces of the double coated adhesive tapes 4. At the time of removing the rear surface metallic case 2 from the liquid crystal panel 1, a solvent, such as alcohol, is applied in these holes 7, by which the adhesive power of the double coated adhesive tapes 4 may be degraded and the easy removal of the rear surface metallic case is made possible without the failure of the glass substrate and driver IC of the liquid crystal panel 1. The efficiency of work, such as repair, may be improved. The number of the holes may be plural pieces and the shape of the holes may be circular, elliptic, polygonal or the shapes of arbitrary combinations thereof.

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 in which a metal case covering a liquid crystal panel used as a display unit of a television monitor, a car navigation system or the like can be easily removed.

[0002]

2. Description of the Related Art A conventional liquid crystal display device will be described below with reference to the drawings. FIG. 3 is a perspective view showing a configuration of a conventional liquid crystal display device. Note that the liquid crystal display device described below is a chip-on-glass (hereinafter referred to as COG) type liquid crystal display device in which a driver IC is directly mounted on a glass substrate. The COG type liquid crystal display device includes a COG type liquid crystal panel 1, a rear metal case 2 and a front metal case 3 for protecting the liquid crystal panel 1,
In the COG type liquid crystal display device, the rear metal case 2 is often fixed to the liquid crystal panel 1 with the double-sided adhesive tape 4 in order to reduce the weight and thickness. The front metal case 3 has a structure in which the front metal case 3 is fitted and held with the rear metal case 2. Reference numeral 5 denotes a driver IC directly mounted on the glass substrate of the liquid crystal panel 1, and reference numeral 6 denotes a flexible printed circuit board for transmitting an electric signal to the liquid crystal panel 1.

[0003]

In such a conventional liquid crystal display device, when the rear metal case 2 is detached from the liquid crystal panel 1 to repair the liquid crystal panel, the adhesiveness of the double-sided adhesive tape 4 is strong. In such a case, an excessive force is applied to the liquid crystal panel 1, and there is a possibility that components such as the glass substrate of the liquid crystal panel 1 and the driver IC 5 may be damaged, and there is a problem that workability is poor.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems. When a metal case is removed, an excessive force is applied to a liquid crystal panel so that components such as a glass substrate of the liquid crystal panel and a driver IC are not damaged. It is an object of the present invention to provide a liquid crystal display device capable of improving the performance.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is a liquid crystal display device having at least one small hole provided within a bonding surface of a double-sided adhesive tape of a metal case.

[0006] Thus, by applying an organic solvent such as alcohol through the hole when removing the metal case, the adhesive strength of the double-sided adhesive tape is reduced, and the metal case can be easily removed from the liquid crystal panel. Breakage of components such as the glass substrate and the driver IC can be prevented, and workability can be improved.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The holes may be of any shape as long as they are sufficient to allow a solvent such as alcohol to penetrate into the adhesive surface of the double-sided adhesive tape. Is also good. The embodiment shows a case where one elliptical hole is provided and a case where a plurality of circular holes are provided. It goes without saying that both are provided within the adhesive surface of the double-sided adhesive tape.

Hereinafter, embodiments will be described.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the liquid crystal display device of the present invention will be described below with reference to the drawings, taking a liquid crystal panel as an example.

FIG. 1A is an exploded perspective view showing the structure of this embodiment, and FIG. 1B is an assembled perspective view. In the figure, 1
Denotes a liquid crystal panel, 2 denotes a rear metal case, 3 denotes a front metal case, and 4 denotes a double-sided adhesive tape for fixing the rear metal case 2 to the liquid crystal panel 1. In addition, the front metal case 3 is structured to be fitted and held with the rear metal case 2. Reference numeral 5 denotes a driver IC directly mounted on the glass substrate of the liquid crystal panel 1, and reference numeral 6 denotes a flexible printed board for transmitting an electric signal to the liquid crystal panel 1.

A hole 7 having an area smaller than that of the double-sided adhesive tape 4 is provided in a portion of the rear metal case 2 where the double-sided adhesive tape 4 is arranged. When the metal case is removed for repairing the liquid crystal display device or the like, an organic solvent such as alcohol is applied to the holes 7 so that the organic solvent permeates between the double-sided adhesive tape 4 and the metal case. The adhesive strength is reduced, and the rear metal case 2 can be removed without damaging the glass substrate of the liquid crystal panel and the components such as the driver IC 5.

FIG. 2A is a perspective view showing the structure of the hole 7 formed of one circle. In the figure, the organic solvent is easily applied to the double-sided adhesive tape 4, and the workability of removing the rear metal case 2 can be improved. FIG.
(B) shows a configuration provided with a plurality of holes 7 formed of a circle. The permeability of the organic solvent into the double-sided adhesive tape 4 is increased, and the workability of removing the rear metal case 2 can be improved.

As described above, according to the present embodiment, one or more holes 7 are provided in the portion where the double-sided adhesive tape 4 is to be adhered, and an organic solvent is applied to the holes 7 so that the double-sided adhesive tape 4 The rear metal case 2 can be easily removed without damaging components such as the glass substrate of the liquid crystal panel and the driver IC 5 so that the workability can be improved.

In this embodiment, the case of a COG type liquid crystal panel has been described. However, the present invention can be applied to a case of using a tape carrier package type liquid crystal panel, and the same effect can be obtained.

[0015]

As is apparent from the above description, the present invention provides a liquid crystal display device having at least one hole within the adhesive surface of a double-sided adhesive tape of a metal case.
A metal case can be removed without damaging components such as a glass substrate of a liquid crystal panel and a driver IC by injecting a solvent into the holes to reduce the adhesive strength.

[Brief description of the drawings]

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

FIG. 2A is a partial perspective view showing the vicinity of one hole in the embodiment. FIG. 2B is a partial perspective view showing the vicinity of a plurality of holes in the embodiment.

FIG. 3A is an exploded perspective view of a conventional liquid crystal display device, and FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 liquid crystal panel 2 rear metal case 3 front metal case 4 double-sided adhesive tape 5 driver IC 6 flexible printed circuit board 7 hole

Claims (3)

[Claims] 1. A liquid crystal panel, and a metal case arranged so as to cover the liquid crystal panel while protecting the liquid crystal panel, and the metal case is fixed to the liquid crystal panel by a double-sided adhesive tape stuck on an inner side thereof. In a liquid crystal display device, at least one hole is provided within an adhesion surface of the double-sided adhesive tape of the metal case. 2. The method according to claim 1, further comprising a hole having a shape selected from a circle, an ellipse, and a polygon, or a combination thereof.
The liquid crystal display device as described in the above. 3. The liquid crystal display device according to claim 1, comprising a plurality of holes having a shape selected from a circle, an ellipse, and a polygon, or a combination thereof.