JPH10319378A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device capable of reducing an outside dimension. SOLUTION: In this liquid crystal display device consisting of a liquid crystal panel, a circuit board for driving the liquid crystal panel, a plastic frame for placing the liquid crystal panel, a backlight of an edge system arranged on the rear surface side of the liquid crystal panel and an outer frame covering them, stoppers 6 controlling the free movement of the liquid crystal panel is provided in holders 2 being components of the backlight.

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 narrow frame using an edge type backlight.

[0002]

2. Description of the Related Art As shown in FIG. 6, a liquid crystal display device generally has a liquid crystal panel 50 in which a display material such as liquid crystal is sandwiched between two opposing substrates, and a liquid crystal display device for driving the panel 50. A circuit board 51 mounted on the liquid crystal panel 5
It comprises an edge-type lighting device (backlight) 53 disposed behind (back) a plastic frame 52 via a plastic frame 52, and an outer frame 54 covering these.

In such a liquid crystal display device, a liquid crystal panel 50 is provided.
Are held on the backlight 53 by injection molding.
A stopper 56 formed integrally with the plastic frame 52 is provided at b, 55c and 55d.

[0004]

However, since the stopper 56 is formed when the plastic frame 52 is formed, the minimum thickness of the stopper 56 is at least 0.5.
0.6 mm is required. Therefore, if one piece of the stopper 56 is provided on the back side of the lamp, the outer diameter vertical dimension of the liquid crystal display device becomes large, and if the other piece of the stopper 56 is provided on the side face of the lamp, the outer diameter lateral dimension of the liquid crystal display apparatus becomes large. growing. Also, a space (thickness) is required on the anti-lamp side by the amount corresponding to the provision of the stopper.

An object of the present invention is to provide a liquid crystal display device capable of reducing the outer diameter in view of the circumstances described above.

[0006]

A liquid crystal display device according to the present invention comprises a liquid crystal panel, a circuit board for driving the liquid crystal panel, a plastic frame for mounting the liquid crystal panel, and a rear side of the liquid crystal panel. A liquid crystal display device comprising an edge type backlight and an outer frame covering the edge type backlight, wherein a stopper for restricting free movement of the liquid crystal panel is provided on a component of the backlight. And

[0007]

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 a perspective view showing an embodiment of a backlight according to the liquid crystal display device of the present invention, FIG. 2 is a perspective view showing another embodiment of the backlight in FIG. 1, and FIG. FIG. 4 is a perspective view showing another embodiment of the backlight in FIG. 3, FIG. 4 is a perspective view showing another embodiment of the backlight in FIG. 3, and FIG. 5 is an outer frame of the liquid crystal display device of the present invention. It is a perspective view showing an embodiment.

The liquid crystal display device includes a liquid crystal panel, a circuit board for driving the liquid crystal panel, a plastic frame on which the liquid crystal panel is mounted, and an edge type backlight disposed on the back side of the liquid crystal panel. And an outer frame that covers them.

As shown in FIG. 1, the backlight comprises:
A lamp 1 as a light source, a holder 2 for holding the lamp 1, a lamp reflector 3 for reflecting the light of the lamp 1, and an acrylic light guide that uses a linear light source emitted from the lamp 1 as a surface light source A light plate 4, a diffusion film for diffusing light and a lens film for condensing light disposed on the light guide plate 4, and disposed below the light guide plate 4 and on a side surface of the light guide plate 4. , And a reflection film for reflecting light and a side reflector 5.

As the holder 2, a rubber holder made of silicone or the like or a metal holder can be used. The reflector 3 and the side reflector 5 can be made of PET (polyethylene terephthalate) or metal.

After the lamp 1 is inserted into the holder 2 and placed on the side of the light guide plate 4, for example,
A reflector 3 arranged so as to wind the lamp 1 is fixed to the upper surface of the light guide plate 4 with a double-sided tape and assembled.

The holder 2, which is a component of the backlight, is provided with an L-shaped stopper 6 for positioning the liquid crystal panel against the liquid crystal panel.

When the holder 2 is a rubber holder, the stopper 6 can be formed by integral molding using a mold.

In the present embodiment, the stopper 6 formed on the holder 2 replaces the stopper formed on the plastic frame at two places. Therefore, the thickness of the stopper of the plastic frame (the thickness of the mold frame). a minus the thickness b of the stopper of the rubber holder, for example, a is 0.6 to 0.7 mm, and b is 0.
If it is 3 to 0.4 mm, ab = 0.2 to 0.4
The outer diameter of the liquid crystal display device can be reduced by the thickness difference of mm. In addition, since the stopper 6 positions the liquid crystal panel, the free movement of the liquid crystal panel can be restricted. When the holder 2 is a rubber holder or when the stopper 6 is made of metal or when the holder 2 and the stopper 6 are made of metal, a shock absorbing member (cushion material) made of silicon or the like is attached to the stopper 6. Thereby, external impact can be absorbed. As the cushion material, it is preferable to use a silicone resin having a hardness of 20 to 50 (HS) and to have a thickness of about 100 μm.

Next, another embodiment of the backlight relating to the liquid crystal display device of the present invention will be described. In the present embodiment, as shown in FIG. 2, a stopper 8 which is disposed in a substantially L-shape is provided at an end of a reflector 7 which is a component of the backlight. When the reflector 7 is made of metal, the stopper 8 can be formed by cutting and bending the end of the reflector 8.

In this embodiment, the stopper 8 formed at the end of the reflector 7 replaces two stoppers formed on the plastic frame, so that the outer diameter of the liquid crystal display device is reduced by the thickness difference. it can. In addition, since the stopper 6 positions the liquid crystal panel,
Free movement of the liquid crystal panel can be restricted, and a shock absorbing member (cushion material) made of silicon or the like can be attached to the surface of the stopper 8 in the same manner as in the above embodiment to absorb a shock. . As the cushion material, it is preferable to use a silicone resin having a hardness of 20 to 50 (HS) and to have a thickness of about 100 μm.

Next, still another embodiment of the backlight relating to the liquid crystal display device of the present invention will be described. In the present embodiment, when the panel size is smaller than the panel size in FIGS. 1 and 2, the side reflector 10 which is a constituent component of the backlight disposed on the side surface of the light guide plate 9 as shown in FIG. Is formed in an L-shape, and a stopper 11 arranged substantially in an L-shape is provided at an end of the side reflector 10. When the side reflector 10 is made of metal, the stopper 11 can be formed by cutting and bending the end of the side reflector 10.

In the present embodiment, the side reflector 1
The stopper 11 formed at the end of the zero replaces two stoppers formed on the plastic frame, so that the outer diameter of the liquid crystal display device can be reduced by the thickness difference. Since the stopper 11 positions the liquid crystal display panel, the free movement of the liquid crystal panel can be restricted. Further, similarly to the above-described embodiment, a cushion material made of silicone or the like can be attached to the surface of the stopper 11 to absorb an impact.

In the present embodiment, the stopper 11
Is formed only on the lamp side A, but the present invention is not limited to this, and a stopper can be formed only on the corner portion 12 on the opposite side to the lamp side B. Alternatively, as shown in FIG. 4, stoppers can be formed in the corner portions 12 on the lamp side A and the opposite side B as well. By forming stoppers on the lamp side A and the anti-lamp side B, the outer diameter of the liquid crystal display device can be further reduced as compared with the embodiment shown in FIGS. That is, in the case of the dimensions a and b, the outer diameter dimension can be reduced by about 0.5 to 1.0 mm.

Next, an embodiment of an outer frame according to the liquid crystal display device of the present invention will be described. In the present embodiment, as shown in FIG. 5, a stopper 13 is provided on the back surface 14a of the outer frame 14 which is a component of the backlight. When the outer frame 14 is made of metal such as stainless steel, the stopper 13 is formed by punching a portion corresponding to a corner of a liquid crystal panel into a U-shape or the like.
The stopper 13 is formed by setting up a punched portion. Alternatively, after extruding a portion corresponding to a corner portion of the liquid crystal panel, a rib is formed to form the stopper 13.

In the present embodiment, since the stopper 13 formed on the outer frame 14 can eliminate four stoppers formed on the plastic frame, the outer diameter of the liquid crystal display device can be reduced by the thickness. Can be smaller. Since the stopper 13 positions the liquid crystal display panel, the free movement of the liquid crystal panel can be restricted.
Further, a cushion material made of silicone or the like can be attached to the surface of the stopper 13 in order to absorb an impact, similarly to the above embodiment.

[0023]

As described above, according to the present invention,
By forming a stopper on the backlight component or the outer frame, the space of the thickness difference between the stopper and the stopper formed on the conventional plastic frame can be reduced without increasing the number of new members. A liquid crystal display device having a small diameter can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a backlight relating to a liquid crystal display device of the present invention.

FIG. 2 is a perspective view showing another embodiment of the backlight in FIG. 1;

FIG. 3 is a perspective view showing still another embodiment of the backlight in FIG. 1;

FIG. 4 is a perspective view showing another embodiment of the backlight in FIG. 3;

FIG. 5 is a perspective view showing an embodiment of an outer frame according to the liquid crystal display device of the present invention.

FIG. 6 is an exploded perspective view of a conventional liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp 2 Holder 3,7 Reflector 4,9 Light guide plate 5,10 Side reflector 6,8,11,12,13 Stopper 14 Outer frame

Claims (7)

[Claims] 1. A liquid crystal panel, a circuit board for driving the liquid crystal panel, a plastic frame for mounting the liquid crystal panel, an edge type backlight disposed on the back side of the liquid crystal panel, and covering these A liquid crystal display device comprising an outer frame, wherein a stopper for restricting free movement of the liquid crystal panel is provided on a component part of the backlight. 2. The liquid crystal display device according to claim 1, wherein the component is a holder for holding a light source. 3. The liquid crystal display device according to claim 1, wherein the component is a reflector arranged around a light source. 4. The liquid crystal display device according to claim 1, wherein the component is a side reflector disposed on a side surface of the light guide plate. 5. The liquid crystal display device according to claim 1, wherein the stopper is provided with a shock absorbing member. 6. A liquid crystal panel, a circuit board for driving the liquid crystal panel, a plastic frame for mounting the liquid crystal panel, an edge-type backlight disposed on the back side of the liquid crystal panel, and covering these. A liquid crystal display device comprising an outer frame, wherein a stopper for restricting free movement of the liquid crystal panel is provided on a back surface of the outer frame. 7. The liquid crystal display device according to claim 6, wherein the stopper is provided with a shock absorbing member.