JPH08327983A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: To provide a liquid crystal display device having good assembling workability at the time of holding a liquid crystal cell in liquid crystal display devices of placing a liquid crystal cell on a supporting body, such as frame, and mounting a picture frame-shaped cover covering the peripheral edges of the liquid crystal cell and the peripheral edges of the supporting body. CONSTITUTION: This liquid crystal display device has plural engaging parts 38, 38... projecting outside from the outer peripheral walls 30 of the supporting body 14 and plural engaging holes 42, 42... disposed on the outer peripheral walls 40 of a cover 16. The engaging parts 38, 38... of the supporting body 14 and the engaging holes 42, 42... of the cover 16 are engaged with each other, thereby, the liquid crystal cell 12 is held between the supporting body 14 and the cover 16.

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 particular, the present invention relates to a liquid crystal display device having a liquid crystal cell holding structure.

[0002]

2. Description of the Related Art Conventionally, there is a liquid crystal display device that holds a liquid crystal cell by sandwiching the liquid crystal cell between a frame that supports the liquid crystal cell from below and a frame-shaped cover that covers from above.

For example, as shown in FIG. 5, a conventional liquid crystal display device 100 includes a TAB (Tape Automated Bond) on a plastic frame 101 called a plastic frame.
ing) 102 and a printed wiring board (hereinafter, referred to as PCB) 103, and a liquid crystal cell 104, which is called a bezel cover, is placed on the liquid crystal cell 104 so as to cover the peripheral portions of the liquid crystal cell 104 and the frame 101. A frame-shaped cover 105 is placed, and the cover 105 and the frame 101 are fixed by a plurality of screws 106, 106 ...

[0004]

However, in the holding structure of the liquid crystal cell 104 as described above, since the plurality of screws 106, 106 ... Are used to attach the cover 105, the assembling work of the liquid crystal display device 100 is performed. However, there is a problem in that it takes time and labor, which causes a cost increase.

Therefore, in view of the above problems, it is an object of the present invention to provide a liquid crystal display device having a good assembling workability when holding a liquid crystal cell.

[0006]

A liquid crystal display device according to claim 1 of the present invention has a liquid crystal cell placed on a support such as a frame, and a peripheral portion of the liquid crystal cell and a peripheral edge of the support on the liquid crystal cell. In a liquid crystal display device provided with a frame-shaped cover that covers the outer peripheral portion of the cover, a plurality of engaging portions protruding outward from the outer peripheral wall of the support, and the outer peripheral wall of the cover corresponding to the engaging portions. A plurality of engaging holes are provided, and the liquid crystal cell is held between the support and the cover.

A liquid crystal display device according to a second aspect of the present invention is the liquid crystal display device according to the first aspect, wherein an elastic body is interposed between the liquid crystal cell and the cover at the four peripheral portions of the liquid crystal cell.

A liquid crystal display device according to a third aspect of the present invention is the liquid crystal display device according to the first aspect, wherein the engaging portion of the support body is an elastic portion protruding outward from an outer peripheral wall of the support body and an upper end of the elastic portion. The claw portion is extended to the claw portion, and the claw portion is fitted in the engagement hole of the cover.

[0009]

In the liquid crystal display device according to the first aspect, when the cover is attached to the support body in which the liquid crystal cells are arranged, the cover is pressed from above. Then, the engaging portion provided so as to project outward from the outer peripheral wall of the support member engages with the engaging hole provided in the outer peripheral wall of the cover in the side wall portion of the device, so that the liquid crystal cell is formed. , Held between the support and the cover.

According to another aspect of the liquid crystal display device of the present invention, the cover is urged upward by an elastic body disposed between the liquid crystal cell and the cover, and the urging force urges the engaging portion of the support body. It is possible to eliminate the play of engagement between the engaging hole of the cover and the engaging hole of the cover.

According to another aspect of the liquid crystal display device of the present invention, the engaging portion provided on the support body is provided with the elastic portion projecting outward from the outer peripheral wall of the support body and extending upward from the tip of the elastic portion. Composed of claws. Therefore, the claw portion has elasticity such that it can be swung inward and outward of the support body about the tip of the elastic portion. Thus, when the cover is attached, if the cover is pressed from above the support, the claw portion is swung inward by the elasticity and smoothly slides into the inside of the cover. Are pushed back into the engaging holes of the cover and fit into the engaging holes of the cover.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display device 10 according to an embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the liquid crystal display device 10 has a liquid crystal cell 12 held between a frame 14 and a cover 16.

The liquid crystal cell 12 is formed by enclosing a liquid crystal between two glass substrates 18 and 20 on which an array electrode and a counter electrode are formed, respectively, and attaching an appropriate polarizing plate. A signal line side TAB 22 and a scanning line side TAB 24, on which a driver LSI for driving the liquid crystal cell 12 is mounted, are connected to the peripheral edge of the array electrode substrate 18 of the liquid crystal cell 12 via an anisotropic conductive film. Cage, each TAB2
2 and 24 are the signal line side PCB 26 and the scanning line side PC, respectively.
It is connected to B28.

The frame 14 is a plastic rectangular frame body that supports the liquid crystal cell 12, and the signal line side PCB 26 and the scanning line side PCB 28 are arranged on the periphery of the frame 14, respectively. A PCB receiving portion 27 and a scanning line side PCB receiving portion 29 are provided. As shown in FIG. 2B, a step portion 32 for supporting the peripheral edge portion of the liquid crystal cell 12 from the lower surface side thereof and an outer peripheral wall 30 extending upward in the peripheral edge portion of the frame 14 and the frame 14 are provided. A recessed groove 36 for mounting the plate-shaped backlight unit 34 is formed in the frame. On the outer surface of the outer peripheral wall 30, as shown in FIG. 1, four engaging portions 38 projecting outward are formed on the long side and two or three engaging portions are formed on the short side. .

The engaging portion 38, as shown in FIG.
An elastic portion 38a protruding outward from the lower end of the outer peripheral wall 30,
The claw portion 38 extending upward from the tip of the elastic portion 38a
b. The claw portion 38b projects further outward than the elastic portion 38a, and has an inclined surface 38c inclined so as to protrude outward as it goes downward, and a hooking surface 38d inclined toward the liquid crystal cell 12 side. The engaging portion 38 has an outer end of the elastic portion 38a, that is, a bent portion 38 extending from the elastic portion 38a to the claw portion 38b.
The claw portion 38b has elasticity such that the claw portion 38b swings inward and outward of the frame 14 centering on e.

The cover 16 is a metal frame member that covers the peripheral portion of the liquid crystal cell 12 and the outer periphery of the frame 14 to protect them. On the outer peripheral wall 40 of the cover 16,
A plurality of square holes 42 that are respectively fitted with the claw portions 38b, 38b ... Of the plurality of engaging portions 38, 38 provided on the frame 14,
42 ... Is formed. That is, four square holes 42 are formed on the long side of the cover 16, and two or three square holes 42 are formed on the short side.

Reference numeral 44 denotes a rectangular rod-shaped elastic body made of rubber, which is arranged on each side of the liquid crystal cell 12 at each of four sides of the liquid crystal cell 12. This elastic body 44, 4
Reference numeral 4 denotes a cover 16 and a counter electrode substrate 20 of the liquid crystal cell 12.
Are disposed on the counter electrode substrate 20 so as to be interposed between the cover 16 and the frame 14 so that the liquid crystal cell 12 disposed on the step portion 32 of the frame 14 has an appropriate elasticity between the cover 16 and the frame 14. Is held.

Reference numeral 46 is an interface PCB for controlling various operations of the liquid crystal cell 12, which is a signal line side PC.
B26 and the scanning line side PCB28 are connected. The interface PCB 46 is provided on one side of the frame 14 so as to face the scanning line side PCB 26 with respect to the liquid crystal cell 12, and the interface PCB receiving portion 48 is provided.
It is located in.

When assembling this liquid crystal display device 10,
After mounting the liquid crystal cell 12 on the frame 14, four elastic bodies 44, 44 ... Are arranged on each side of the liquid crystal cell 12,
The cover 16 is put over it. At this time, the cover 16
The lower end of the outer peripheral wall 40 presses the inclined surface 38c of the claw portion 38b of the engaging portion 38 provided on the frame 14 downward.
Then, the engaging portion 38 is changed by the elasticity of the elastic portion 38a.
The claw portion 38b is deformed so as to swing toward the inside of the frame 14 and smoothly slips into the inside of the cover 16. Further, due to the elasticity, the claw portion 38b is pushed back outward and fitted into the square hole 42 of the cover 16. As a result, the engagement portion 38 and the square hole 42 are fitted to each other on the side wall of the device 10. Here, since the elastic body 44 urges the cover 16 to be pushed upward, the hooking surface 38d of the claw portion 38b and the lower side of the opening edge of the square hole 42 are engaged, and the cover 16 is framed. It fits snugly against 14 without play.

In this liquid crystal display device 10, if the cover 16 is pressed from above the frame 14 when the cover 16 is attached to the frame 14 in which the liquid crystal cells 12 are arranged,
Due to the elasticity of the engaging portion 38, the claw portion 38b can be easily fitted into the engaging hole 42 of the cover 16, and the fitting between the claw portion 38b and the engaging hole 42 is unlikely to come off. In this way, the cover 16 is fitted by fitting the engaging portion 38 and the square hole 42.
Since it is possible to attach a screw, there is no need to use a screw as in the conventional case, and the assembling workability is good. Therefore,
The cost can be reduced. In addition, the elasticity of the engaging portion 38 makes it difficult for the claw portion 38b and the engaging hole 42 to be disengaged from each other, so that the liquid crystal cell 12 can be reliably held.

The engaging surface 38d of the engaging portion 38 does not necessarily have to be inclined as described above and can be formed horizontally, but as shown in FIG. It is preferable to incline downward because the square hole 42 of the cover 16 can be engaged more firmly.

FIG. 3 shows a liquid crystal display device 50 according to another embodiment of the present invention.

In this liquid crystal display device 50, in order to narrow the frame, as shown in FIG. 3A, a TAB 52 for driving the liquid crystal cell 12 is bent and arranged so as to cover the side wall of the frame 14. ing. That is, the liquid crystal display device 50 is different from the above-described embodiments in that a so-called bent TAB 52 is used in place of the signal line side TAB 22 in the above-described embodiment. In this case, as shown in FIG. 3B, the TAB 52 is divided into a plurality of pieces so that the engaging portion 38 of the frame 14 can be projected outward even in the side wall portion where the bent TAB 52 is arranged. Further, the engaging portion 38 is formed to have a bent side surface so as to project from between the separated TABs 52, 52, .... These TABs 52, 52 ... Are connected to a PCB 54 arranged so as to contact the lower surface of the frame 14. As described above, when the bent TAB 52 is used, the signal line side PCB receiving portion 27 is unnecessary, and the frame can be narrowed.

When the bent TAB 52 is used as in the present embodiment, T is set so that the engaging portion 38 can project outward.
If AB is separated or a cut is made in TAB, assembling workability is improved by fitting the engaging portion 38 of the frame 14 and the square hole 42 of the cover 16 as in the liquid crystal display device 10 described above. Become.

In the liquid crystal display device 50,
An elastic body 56 made of rubber is also arranged between the frame 14 and the array electrode substrate 18 with respect to the four peripheral portions of the liquid crystal cell 12, and together with the elastic body 44 arranged on the upper surface of the liquid crystal cell 12, Square hole 4 of the engaging portion 38 and the cover 16
The play in fitting with 2 is eliminated, and the shock resistance and vibration resistance of the device 50 are further improved.

Although the case where the bent TAB 52 is used only on the signal line side has been described above, it may be used on the scanning line side or both the signal line and the scanning line. .

FIG. 4 shows a liquid crystal display device 60 according to still another embodiment.

The liquid crystal display device 60 is of a COG (Chip On Glass) system in which a driver LSI 62 is directly mounted on the array electrode substrate 18 in order to save space and reduce cost. As described above, if the bending TAB 52 is omitted as the COG method, not only the number of parts and the number of steps can be reduced, but also the engaging portion 3 is provided between the bending TAB 52.
Compared with the above-mentioned embodiment in which the position of the engaging portion 38 is limited to a certain extent in order to project 8, the position of the engaging portion 38 can be freely set, which is very advantageous.

[0030]

According to the liquid crystal display device of the present invention, since the liquid crystal cell is held between the support and the cover by the engagement between the engagement portion of the support and the engagement hole of the cover, the screw is attached. It is not necessary to assemble by using, therefore, the assembling workability is good and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a liquid crystal display device 10 according to an embodiment of the present invention.

2A is an enlarged perspective view of a main part of the liquid crystal display device 10, and FIG. 2B is a sectional view of the main part.

FIG. 3A is a liquid crystal display device 60 according to another embodiment.
3B is a cutaway perspective view showing a main part of FIG. 5B, and FIG.

FIG. 4 is a cutaway perspective view showing a main part of a liquid crystal display device 60 according to still another embodiment.

FIG. 5 is an exploded perspective view of a conventional liquid crystal display device 100.

[Explanation of symbols]

 10, 50, 60 ... Liquid crystal display device 12 ... Liquid crystal cell 14 ... Frame 16 ... Cover 30 ... Outer peripheral wall 38 of frame 14 ... Engaging portion 38a ... Elastic portion 38b of engaging portion 38 ... Engaging Claw 40 of portion 38 ... Outer peripheral wall 42 of cover 16 ... Square hole 44 ... Elastic body

Claims (3)

[Claims] 1. A liquid crystal display device in which a liquid crystal cell is placed on a support such as a frame, and a frame-shaped cover for covering the peripheral edge of the liquid crystal cell and the peripheral edge of the support is mounted thereon. , A plurality of engaging portions protruding outward from the outer peripheral wall of the support, and a plurality of engaging holes provided in the outer peripheral wall of the cover corresponding to the engaging portion, the liquid crystal cell A liquid crystal display device, which is held between the support and the cover. 2. The liquid crystal display device according to claim 1, wherein an elastic body is interposed between the liquid crystal cell and the cover at the four peripheral portions of the liquid crystal cell. 3. The engaging portion of the support comprises an elastic portion protruding outward from an outer peripheral wall of the support, and a claw portion extending upward from a tip of the elastic portion, The liquid crystal display device according to claim 1, wherein the claw portion is fitted in the engagement hole of the cover.