JP2001033764A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device which allows the improvement in workability at the time of assembly of the liquid crystal display device, the improvement in workability at the time of its disassembly, the prevention of partial damage and the suppression of trouble (panel offset, inclusion of foreign matter, etc.), arising before the fixation of a front frame during assembly work. SOLUTION: This liquid crystal display device consists of a liquid crystal panel 1 which is packaged with a liquid crystal driving IC and a substrate, a back light unit 2 which may be positioned and mounted with this liquid crystal panel 1 and is provided with projection on both longitudinal sides and the front frame 3 which is provided with positioning holes 3a and 3b in the positions corresponding to the projections 2a and 2b of the back light unit 2. The projection 2a on one side of the long side projects from the positioning hole 3a to sufficiently assure a catch and the projection 2b on the opposite side of the long hole exists within the positioning hole 3b to shallow the catch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a liquid crystal display device. More particularly, the present invention relates to a liquid crystal display device that facilitates a front frame mounting operation in a liquid crystal module assembling operation.

[0002]

2. Description of the Related Art As a conventional liquid crystal display device, for example, as shown in FIGS. 8 and 9, a positioning projection 52 formed on a backlight unit 51 is caught by a positioning hole 54 of a front frame 53 to secure module strength. Some structures have In this liquid crystal display device,
In order to secure the module strength, the dimensions of the projection 52 and the positioning hole 54 are determined in consideration of the amount of engagement of the projection 52.

Another conventional liquid crystal display device uses a caulking method for fixing a module. In this liquid crystal display device, as shown in FIG. 10, a front frame 62 is fitted into a backlight unit 61 on which a liquid crystal panel is mounted, and a caulking portion 63 formed on the front frame 62 is bent into a recess 64 of the backlight unit 61. Thus, the liquid crystal module is fixed.

[0004]

However, FIGS.
In the case of the conventional liquid crystal display device shown in FIG. 9, it is necessary to secure a sufficient amount of hooking in order to secure the module strength. However, since the front frame needs to be opened, there is a problem that the front frame is deformed.

Further, in the case of the conventional liquid crystal display device shown in FIG. 10, the front frame is not fixed before the crimping, and the front frame is easily opened. However, there is a problem that the liquid crystal panel comes off due to the opening of the front frame, or a problem such as foreign matter mixing occurs.

In view of the circumstances described above, the present invention improves the workability when assembling a liquid crystal display device, improves the workability when disassembling, and prevents partial damage. It is an object of the present invention to provide a liquid crystal display device that can suppress a problem that occurs (such as a panel shift or a foreign substance mixture).

[0007]

A liquid crystal display device according to the present invention comprises a liquid crystal panel on which a liquid crystal driving IC and a substrate are mounted, a liquid crystal panel on which the liquid crystal panel can be positioned and mounted, and projections provided on both long sides. A liquid crystal display device comprising a light unit and a front frame provided with a positioning hole at a position corresponding to the projection of the backlight unit, wherein the projection on one long side protrudes from the positioning hole to sufficiently reduce the amount of hooking. The protrusion on the opposite side to the long side is located in the positioning hole so that the amount of catch is reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display device according to the present invention comprises a liquid crystal panel on which a liquid crystal driving IC and a substrate are mounted, and a backlight unit (B) capable of positioning and mounting the liquid crystal panel.
/ L) and a front frame for fixing them. A projection A having a different projection amount on both long sides of the backlight unit;
B is provided, and the positioning holes of the front frame are fitted to these projections A and B to fix the front frame. In this structure, the protrusion amount of one of the protrusions A is equal to or larger than the thickness of the front frame, so that the protrusions are sufficiently secured. Further, the amount of protrusion of the other protrusion B is made smaller than the thickness of the front frame, so that the amount of protrusion of the protrusion is reduced. According to the above structure, during assembly, the positioning hole of the front frame is hooked on the projection A from the side of the projection A with the large amount of hooking, and then the positioning hole is fitted into the projection B with the small amount of hooking. For this reason, it works effectively as temporary fixation until the permanent fixation of the front frame is performed, and it is possible to prevent problems caused by opening of the front frame.

Hereinafter, a liquid crystal display device of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, a liquid crystal display device according to an embodiment of the present invention is configured such that a liquid crystal panel 1 on which a liquid crystal driving IC and a substrate are mounted is positioned on a backlight unit 2. After being stored, the front frame 3 is fixed on the front frame 3.

On both long sides of the backlight unit 2, two types of projections 2a and 2b having different projection amounts are provided, and these projections 2a and 2b are fitted into positioning holes 3a and 3b of the front frame 3. Then, positioning and temporary fixing are performed. The protrusion 2 a is formed to be equal to or thicker than the thickness of the front frame 3. The protrusion 2 b is formed smaller than the thickness of the front frame 3. When assembling the module, assembly can be easily performed by assembling from the side of the projection 2a having a large projection amount and finally fitting the projection 2b having a small projection amount.

In the present embodiment, since the projections of the projections formed on the long sides of the backlight unit facing each other are of two types, large and small, they are temporarily fixed until the main frame is securely fixed. Works effectively.
Therefore, when the temporarily fixed module is inverted, the front frame does not open and the liquid crystal panel does not come off. Next, after the front frame 3 is fitted, the strength of the liquid crystal module can be ensured by bending the caulking portion 3c shown in FIGS.

Next, instead of the caulking portion, another means for securely fixing the shallow projection side will be described. In this embodiment, as shown in FIG. 5, screw fixing is used as the main fixing method on the side of the protrusion 2b having a small protrusion amount.
That is, after the screw 13 is inserted into the through hole 12 formed in the backlight unit 11, the front frame 14
Is screwed to the female screw 15 formed on the upper side of the. Such screw fixing portions may be formed, for example, at two to four places. Thus, the strength of the liquid crystal module can be ensured by fastening the backlight unit 11 together with the front frame 14.

Next, another screw fixing will be described as a main fixing method of the protrusion 2b having a small protrusion amount. In this embodiment,
As shown in FIG. 6, after inserting an insert nut 22 into the upper recess of the backlight 21, a screw 25 is inserted into a through hole 24 formed on the upper side of the front frame 23, and a screw is inserted into the insert nut 22. I'm wearing Such screw fixing portions may be formed, for example, at two to four places. As a result, the insert nut 22 provided on the backlight unit 21 allows the front frame 2
By fastening together 3, the strength of the liquid crystal module can be ensured.

Next, an embodiment in which an adhesive tape method is used as a permanent fixing method for the protrusion 2b having a small protrusion amount will be described. In the present embodiment, as shown in FIG. 7, an adhesive tape 33 is attached from the bottom surface 31 a of the backlight 31 to the side surface 32 a of the front frame 32. The adhesive tape 33 can be attached to the entire surface of one side of the front frame 32 or at predetermined intervals. Thus, by fixing the backlight unit 31 and the front frame 32, the strength of the liquid crystal module can be secured.

[0016]

As described above, according to the present invention,
In addition to facilitating the mounting work of the front frame during the assembly work of the liquid crystal module, the front frame can be temporarily fixed until the front frame is fully fixed, and the liquid crystal panel may come off due to the opening of the front frame, or foreign matter may be mixed in. And the like can be suppressed. Furthermore, even when the liquid crystal module is disassembled due to some trouble, the front frame can be easily removed, and the possibility of inducing a partial defect such as deformation is reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a liquid crystal display device of the present invention.

FIG. 2 is a perspective view of a temporary connecting portion in FIG.

FIG. 3 is a bottom view of the liquid crystal display device in FIG.

FIG. 4 is a perspective view of a main connecting portion in FIG. 3;

FIG. 5 is a cross-sectional view showing another embodiment of the liquid crystal display device of the present invention.

FIG. 6 is a cross-sectional view showing still another embodiment of the liquid crystal display device of the present invention.

FIG. 7 is a cross-sectional view showing still another embodiment of the liquid crystal display device of the present invention.

FIG. 8 is a bottom view showing an example of a conventional liquid crystal display device.

9 is a sectional view of the liquid crystal display device in FIG.

FIG. 10 is a bottom view showing another example of the conventional liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2 Backlight unit 2a, 2b Projection 3 Front frame 3a, 3b Positioning hole 13, 25 Screw 22 Insert nut 33 Adhesive tape

Claims (6)

[Claims] 1. A liquid crystal panel on which a liquid crystal driving IC and a substrate are mounted, a backlight unit on which the liquid crystal panel can be positioned and mounted, and a projection provided on both long sides and a projection of the backlight unit. And a front frame provided with a positioning hole at a position where the long side protrudes from the positioning hole to ensure a sufficient amount of hooking, and a projection on the opposite side of the long side is secured. A liquid crystal display device, wherein the liquid crystal display device is located in a positioning hole and has a small hooking amount. 2. The liquid crystal display device according to claim 1, further comprising means for fixing the front frame to a backlight unit in order to securely fix the shallow projection side. 3. The caulking portion formed on the front frame is bent and fixed to the recess of the backlight unit for the permanent fixing of the shallow protrusion side of the hook. Item 2. The liquid crystal display device according to item 1. 4. The liquid crystal display device according to claim 1, wherein a front frame is fixed with a screw from the backlight unit side for the main fixing of the shallow projection side. 5. The liquid crystal display device according to claim 1, wherein a backlight unit is fixed with screws from the front frame side for the main fixing of the shallow protrusion side. 6. The liquid crystal display device according to claim 1, wherein the front frame and the backlight unit are fixed with an adhesive tape for the main fixing of the shallow protrusion side.