JP2002182209A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device which has a small number of components and can easily be assembled. SOLUTION: At least one groove is formed on the peripheral surface of a backlight unit 3. A slit is formed at the position opposed to the groove of the backlight unit 3 on the peripheral surface of a frame 1. A protruding line is provided on a bracket 4 for fixing a display unit 5 in an external easing 6. The protruding line of the bracket 4 is inserted into the slit of the frame 1 and the groove of the backlight unit 3.

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 a liquid crystal display device having a small number of components and capable of being easily assembled.

[0002]

2. Description of the Related Art Conventionally, liquid crystal display devices have been widely used as display devices used in portable terminals such as notebook personal computers. As shown in FIG. 4, a conventional liquid crystal display device includes a liquid crystal cell 12 and a backlight unit 1.
3, the display unit includes a liquid crystal cell 12 and a backlight unit 13 fixed by a frame 11, and an external housing (not shown) for accommodating the display unit.

In the conventional liquid crystal display device, when the backlight unit 13 and the frame 11 are fixed to each other in order to prevent damage due to impact or the like, the backlight unit 13 is fixed by screws 14, fixed by tape, or fixed by a tape. 11 was crimped on the outer peripheral surface of the backlight unit 23.

[0004]

However, the conventional liquid crystal display device has a problem that the number of parts of fixing means such as screws and tapes increases. In addition, since both the work of fixing with a screw or tape and the work of caulking the frame require time and effort, there is a problem that it takes time to assemble the liquid crystal display device.

[0005] The present invention has been made to solve such a problem, and an object of the present invention is to provide a liquid crystal display device which has a small number of parts and can be easily assembled.

[0006]

According to a first aspect of the present invention, there is provided a liquid crystal display device comprising a liquid crystal cell and a backlight unit stacked on each other, and the liquid crystal cell and the backlight unit fixed by a frame.
What is claimed is: 1. A liquid crystal display device comprising: an external housing accommodating the display unit, wherein at least one concave portion is formed on an outer peripheral surface of the backlight unit, and the liquid crystal display device faces a concave portion of the backlight unit on an outer peripheral surface of the frame. An opening is formed at a position where the bracket is fixed to the display unit, and a convex portion is provided on a bracket for fixing the display unit inside the external housing. The convex portion of the bracket is inserted into the opening of the frame and the concave portion of the backlight unit. It is characterized by becoming.

According to a second aspect of the present invention, there is provided a liquid crystal display device, wherein a liquid crystal cell and a backlight unit are laminated.
A liquid crystal display device comprising: a display unit in which the liquid crystal cell and the backlight unit are fixed by a frame; and an external housing that houses the display unit, wherein at least one projection is provided on an outer peripheral surface of the backlight unit. An opening is formed on the outer peripheral surface of the frame at a position facing the convex portion of the backlight unit; a recess is provided in a bracket for fixing the display unit inside an external housing; The projection of the light unit is inserted into the opening of the frame and the recess of the bracket.

It is preferable that the bracket, the frame and the backlight unit are integrally fastened by fastening means.

In a liquid crystal display device according to a fourth aspect of the present invention, a liquid crystal cell and a backlight unit are stacked,
What is claimed is: 1. A liquid crystal display device comprising: a display unit in which a liquid crystal cell and a backlight unit are fixed by a frame; and an external housing for housing the display unit, wherein at least one concave portion is formed on an outer peripheral surface of the backlight unit. An opening is formed on the outer peripheral surface of the frame at a position facing the concave portion of the backlight unit, and a convex portion for fixing the display unit is provided inside the external housing; Are inserted into the opening of the frame and the recess of the backlight unit.

In a liquid crystal display device according to a fifth aspect of the present invention, a liquid crystal cell and a backlight unit are stacked,
A liquid crystal display device comprising: a display unit in which the liquid crystal cell and the backlight unit are fixed by a frame; and an external housing that houses the display unit, wherein at least one projection is provided on an outer peripheral surface of the backlight unit. A part is formed, an opening is formed at a position facing the convex part of the backlight unit on the outer peripheral surface of the frame, and a fitted part having a concave part for fixing the display unit inside the external housing is formed. The backlight unit is provided so that a convex portion of the backlight unit is inserted into an opening of the frame and a concave portion of the external housing.

[0011] It is preferable that the convex portion is formed of a ridge and the concave portion is formed of a groove.

[0012]

Next, the liquid crystal display device of the present invention will be described in more detail with reference to the drawings. 1 (a) is a plan view, FIG. 1 (b) is an exploded perspective view, and FIG. 1 (c) shows an embodiment of the liquid crystal display device according to the present invention.
FIG. 2 is an enlarged sectional view of a main part showing another embodiment of the liquid crystal display device of the present invention, and FIG. 3 is an exploded perspective view showing still another embodiment of the liquid crystal display device of the present invention. is there.

In the liquid crystal display device shown in FIG. 1, a display unit 5 is accommodated in an outer casing 6, and the display unit 5 is fixed by a bracket 4.

The display unit 5 has a structure in which the liquid crystal cell 2 and the backlight unit 3 are stacked, and the outer peripheral surfaces of the liquid crystal cell 2 and the backlight unit 3 are fixed by the frame 1.

The frame 1 according to the present embodiment is formed of a frame having a substantially L-shaped cross section so as to cover the periphery of the front surface of the liquid crystal cell 2.

The liquid crystal cell 2 employs a liquid crystal cell generally used in the related art. For example, a circuit in which all or a part of a semiconductor chip for driving a liquid crystal and other electronic parts necessary for driving and controlling the liquid crystal are mounted. A liquid crystal cell having a substrate or a liquid crystal cell having a structure in which a liquid crystal driving semiconductor chip and all or a part of other electronic components necessary for driving and controlling the liquid crystal are mounted on the liquid crystal cell can be employed. .

The backlight unit 3 only needs to be a planar light source, and various light sources can be employed. For example, a side light type backlight unit in which a light guide plate, a diffusion plate, a prism sheet, and the like are stacked, a rod-shaped light source is arranged on a side surface of the light guide plate, and is housed in a flat housing may be employed.

Of the outer peripheral surface of the backlight unit 3,
A groove 9 is formed on each of the two opposing surfaces,
On the other hand, a slit 8 is formed at a position facing the groove 9 on the outer peripheral surface of the frame 1.

On the opposing surfaces of a pair of brackets 4 for fixing the display unit 5 inside the outer casing 6, projecting ridges 7 are respectively provided. The bracket 4 is formed with a fitting hole 4a for fitting into the projection 6a inside the outer housing 6.

In the liquid crystal display device shown in FIG. 1, the backlight unit 3, the liquid crystal cell 2 and the frame 1 are overlapped, and the ridge 7 of the bracket 4 is inserted into the slit 8 of the frame 1 and the groove 9 of the backlight unit 3. The frame 1, the backlight unit 3 and the bracket 4
Is fixed. Thus, the frame 1 and the backlight unit 3 for forming the display unit 5 are fixed and reinforced, and further, the liquid crystal cell 2 sandwiched between the frame 1 and the backlight unit 3 is fixed. it can. Therefore, it is possible to reduce the number of components for fixing means such as screws for fixing and reinforcing the display unit 5.

After the display unit 5 is fixed and reinforced by using the bracket 4 as described above, the projection 6a of the external housing 6 is inserted into the fitting hole 4a of the bracket 4 so that the display unit 5 is externally mounted. It can be fixed inside the housing 6.

Further, as another embodiment of the present invention,
As shown in FIG. 2, the ridge 7 of the bracket 4 is inserted into the slit 8 of the frame 1 and the
Then, the bracket 4, the frame 1, and the backlight unit 3 may be integrally fastened by fastening means such as screws 15. Thereby, the display unit 5 can be more firmly fixed and reinforced.

In the liquid crystal display device shown in FIG. 1, the ridge 7 is provided on the bracket 4 and the groove 9 is formed on the backlight unit 3. However, the present invention is not limited to this, and the groove is formed on the bracket 4. In addition, a projection may be provided on the backlight unit 3. In this case, the projections of the backlight unit 3 are inserted into the slits 8 of the frame 1 and the grooves of the bracket 4, so that the display unit 5 can be fixed and reinforced.

Further, as still another embodiment of the liquid crystal display device of the present invention, in the liquid crystal display device shown in FIG.
In order to fix the display unit 5 similar to that described above to the outer housing 6, a ridge 11 having a substantially L-shaped cross section is provided inside the outer housing 6.
Is protruding. The display unit 5 is similar to FIG.
A groove is formed in the backlight unit 3, and a slit is formed in the frame 1.

The liquid crystal display device shown in FIG. 3 also has the groove 10 of the display unit 5 and the ridge 1
By fixing the two, the fixing and reinforcement of the display unit 5 can be achieved.

Although the number of the ridges 11 is not particularly limited in the present invention, if the ridges 11 are arranged in four places in a rectangular shape as shown in FIG. It can be firmly fixed in any of the up, down, left, right, front and back directions.

In the liquid crystal display device shown in FIG. 3, a ridge 11 is provided on the outer casing 6 and a groove 10 (specifically,
Although the groove 9) is formed in the backlight unit 3, the present invention is not limited to this, but an engaged portion having a concave portion is formed in the external housing 6, and the projection unit is formed in the backlight unit 3. May be provided. In this case, the projections of the backlight unit 3 are inserted into the slits 8 of the frame 1 and the recesses of the engaged portions, so that the display unit 5 can be fixed and reinforced.

In the above embodiment, as an example of the projection and the recess, a set of a ridge and a groove, which can be easily fitted and have sufficient strength, has been described. The present invention is not limited to this, and other shapes of protrusions and recesses (such as protrusions and holes) may be employed.

[0029]

According to the present invention, in order to fix the frame between the display unit and the backlight unit, a convex portion or a concave portion provided on a bracket or the like for fixing the display unit to an external housing. Is used, the number of parts is reduced, and assembly can be performed easily. As a result, the manufacturing time of the liquid crystal display device can be significantly reduced.

[Brief description of the drawings]

FIG. 1A is an explanatory plan view, FIG. 1B is an exploded perspective view, and FIG. 1C is a sectional view taken along line AA of FIG. 1A, showing an embodiment of the liquid crystal display device of the present invention.

FIG. 2 is a main part enlarged sectional view showing another embodiment of the liquid crystal display device of the present invention.

FIG. 3 is an exploded perspective view showing still another embodiment of the liquid crystal display device of the present invention.

FIG. 4 is an exploded perspective view of a display unit of a conventional liquid crystal display device.

[Explanation of symbols]

 1 frame 2 liquid crystal cell 3 backlight unit 4 bracket 5 display unit 6 external housing

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hisashi Ota 997 Miyoshi, Nishigoshi-cho, Kikuchi-gun, Kumamoto Prefecture F-term in Advanced Display Co., Ltd. (Reference) 2H089 HA40 QA12 TA17 TA18 2H091 FA21X FA31Z FA41Z LA12 5G435 AA17 BB12 EE13 EE50 KK05 LL07

Claims (6)

[Claims] 1. A liquid crystal display device comprising a display unit in which a liquid crystal cell and a backlight unit are stacked, and wherein the liquid crystal cell and the backlight unit are fixed by a frame, and an external housing that houses the display unit. At least one concave portion is formed on the outer peripheral surface of the backlight unit, and an opening is formed on the outer peripheral surface of the frame at a position facing the concave portion of the backlight unit, and the display unit is placed inside the external housing. A liquid crystal display device in which a convex portion is provided on a bracket for fixing, and the convex portion of the bracket is inserted into an opening of the frame and a concave portion of the backlight unit. 2. A liquid crystal display device comprising: a display unit in which a liquid crystal cell and a backlight unit are stacked; and the liquid crystal cell and the backlight unit are fixed by a frame; and an external housing that houses the display unit. At least one projection is formed on the outer peripheral surface of the backlight unit, and an opening is formed on the outer peripheral surface of the frame at a position facing the convex portion of the backlight unit. A liquid crystal display device in which a recess is provided in a bracket for fixing it inside, and a protrusion of the backlight unit is inserted into an opening of the frame and a recess of the bracket. 3. The liquid crystal display device according to claim 1, wherein the bracket, the frame, and the backlight unit are integrally fastened by fixing means. 4. A liquid crystal display device comprising a display unit in which a liquid crystal cell and a backlight unit are stacked, and wherein the liquid crystal cell and the backlight unit are fixed by a frame, and an external housing that houses the display unit. At least one concave portion is formed on the outer peripheral surface of the backlight unit, an opening is formed on the outer peripheral surface of the frame at a position facing the concave portion of the backlight unit, and the display unit is provided inside the external housing. A liquid crystal display device provided with a convex portion for fixing the liquid crystal panel, and the convex portion of the external housing is inserted into an opening of the frame and a concave portion of the backlight unit. 5. A liquid crystal display device comprising a display unit in which a liquid crystal cell and a backlight unit are stacked, and wherein the liquid crystal cell and the backlight unit are fixed by a frame, and an external housing that houses the display unit. At least one convex portion is formed on the outer peripheral surface of the backlight unit, an opening is formed at a position on the outer peripheral surface of the frame opposite to the convex portion of the backlight unit, and the opening is formed inside the external housing. A liquid crystal display device comprising: a fitted portion having a concave portion for fixing a display unit; and a convex portion of the backlight unit inserted into an opening of the frame and a concave portion of the external housing. 6. The liquid crystal display device according to claim 1, wherein said convex portion comprises a ridge, and said concave portion comprises a groove.