JP2001174789A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positioning and fixing structure of a liquid crystal panel in which the space to attach the guide can be decreased, the outer form of the frame can be decreased, and the size of a liquid crystal display device itself can be reduced by making the size of the guide for positioning and fixing of a liquid crystal panel small. SOLUTION: L-shape guides 1 to 4 made of plastic molded products are attached to the four corners of a center frame 30. Pins are formed on the lower side of the guides 1 to 4 to be fitted to the specified position of holes of the center frame 30. Also pins are formed on the upper side. Pins 11 to 13 of the guide 1 are fitted to specified holes of the center frame. The position of the pin 11 is regarded as the reference. Since the holes to fit the pins 12, 13 are made long, the position in the Y direction can be finely adjusted, and the guide is fixed with screws 5. Also, the guides 2 to 4 are fixed in the same procedure. Then a liquid crystal panel is fitted onto the center frame 30 engaged with the guides 1 to 4 so that the specified position of the panel is determined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a position fixing structure of a liquid crystal panel provided between a first frame and a second frame in a liquid crystal display device, and more particularly to a position fixing structure of a large liquid crystal panel. Things.

[0002]

2. Description of the Related Art In a liquid crystal display device, since liquid crystal itself does not emit light, characters and images are displayed by transmitting light emitted from a light source disposed on the back surface of a liquid crystal panel. As this light source, a fluorescent tube that is brighter and has good color reproducibility is often used. The configuration of a conventional liquid crystal display device will be described with reference to the drawings.

FIG. 5 shows a liquid crystal panel 10 and a liquid crystal panel 1.
FIG. 1 is a front view of a liquid crystal display device including a frame-shaped bezel 20 for supporting and fixing components such as a liquid crystal panel 10 and a backlight over the reference numeral 0. FIG. 6 shows the bezel 20
FIG. 5 is a view showing the structure of the liquid crystal panel 10, the middle frame 30, and guides 51 and 52 with the display panel removed. First, a reflection plate, a light guide plate made of transparent acrylic, a fluorescent tube, an optical sheet, and the like are arranged on a lower frame of a pressed aluminum product. Next, the middle frame 30 of the pressed aluminum product is placed over the top. Then, as shown in FIGS. 5 and 6, the liquid crystal panel 10 is placed on the middle frame 30.
A bezel 20 of an aluminum pressed product is placed over the top. Then, the liquid crystal panel 10 and the plurality of claws provided on the side surface of the bezel 20 and the screw stoppers 18 on the front side are used.
The liquid crystal display device is completed by fixing the lower frame, the middle frame 30, and the like.

A gap between the bezel 20 and the liquid crystal panel 10 is provided with a spacer rubber or the like to protect the liquid crystal panel 10 and prevent electrical components from contacting.

A method for fixing the position of the liquid crystal panel 10 when the liquid crystal panel 10 is mounted on the middle frame 30 will be described with reference to FIGS. Guides 51 and 52 in the frame of FIG.
Is shown in FIG. The guide 51 which is a plastic molded product is screwed 19 to the left side of the middle frame 30 and the guide 52 is screwed 19 to the right side of the middle frame 30. Guides 53 are provided on the guides 51 and 52. The liquid crystal panel 10 is positioned by the guide ribs 53 so as not to be largely displaced in the X and Y directions. LCD panel 10
Several sides of the tape carrier package (hereinafter, referred to as
(Referred to as TCP) 35 is provided and connected to the drive circuit board via the TCP 35.

[0006]

However, since the guides 51 and 52 have a small thickness and an elongated shape, when molded with plastic, the guides 51 and 52 are liable to be warped in the X and Y directions. Also, twisting on the X and Y planes is likely to occur. There was almost no problem with a liquid crystal panel of 15 inches or less, but in the case of a large liquid crystal display device such as 28 inches or 30 inches, the length of the guides 51 and 52 is 40 mm.
0 mm or more. As described above, when the shapes of the guides 51 and 52 are large, distortion, warpage, and torsion increase, and there is a problem that the positioning and fixing of the liquid crystal panel 10 cannot be performed accurately.

As a measure against the distortion, warp and twist, the thickness of the guides 51 and 52 is increased,
What is necessary is just to enlarge the shape of 1,52. But Guide 5
Since the shape of the first and second 52 becomes larger and the space for mounting the guides 51 and 52 becomes larger,
The outer shape of the bezel 20 also becomes large. This countermeasure cannot be used because it goes against the market trend of "the display screen is large and the external shape is small."

In addition, as the shapes of the guides 51 and 52 become larger, the size of the mold is inevitably increased, and the cost required for manufacturing and managing the mold is significantly increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and eliminates distortion, warping, and twisting of a guide for positioning and fixing a liquid crystal panel, and can reduce the outer shape of a frame. It is intended to provide a structure that can easily position and fix the position.

[0010]

According to the present invention, there is provided a liquid crystal display device having a liquid crystal panel sandwiched between a first frame and a second frame. An L-shaped guide is provided at least at two corners.

Further, a positioning projection may be provided on the second frame side of the L-shaped guide.

Further, a projection for securing a gap between the first frame and the liquid crystal panel may be provided on the first frame side of the L-shaped guide.

The operation of the above configuration will be described.

By providing L-shaped guides in at least two of the four corners of the second frame on the first frame side, even if the guides are molded of plastic, the shape of the guides is small, so that distortion, warping, Since twisting is less likely to occur and the precision of the components is improved, the positioning and fixing of the liquid crystal panel can be performed with high precision. Even if warping, warping, or twisting occurs, the shape of the guide is small, so that it can be easily corrected.

Since the guide has a small shape, the space for mounting the guide can be reduced, so that the outer shapes of the first frame and the second frame can be reduced, and the size of the liquid crystal display device itself can be reduced.

Further, since the shape of the guide is small, the molding die is inevitably small, and the shape of the guide is simple, so that the cost required for manufacturing and managing the die can be reduced.

Since the positioning protrusion is provided on the second frame side of the L-shaped guide, the positioning of the guide can be easily performed. Further, since the reference position is determined, the positioning of the liquid crystal panel can be performed with high accuracy.

On the first frame side of the L-shaped guide, a first
By providing the projection for securing the gap between the frame and the liquid crystal panel, it is possible to secure the gap between the first frame and the liquid crystal panel near the guide and prevent the electrical components from contacting.

[0019]

FIG. 1 shows a state in which a liquid crystal panel 10 is mounted on a middle frame 30 which is a second frame, and a bezel 20 which is a first frame is mounted thereon. FIG. 2 is a front view and a side view of a liquid crystal display device including a frame-shaped bezel 20 for supporting and fixing components such as the liquid crystal panel 10 and a backlight over the liquid crystal panel 10. FIG. 3 shows a state in which the bezel 20 is removed and the guides 1 to 4, the liquid crystal panel 10, and the middle frame 3 are removed.
It is a figure which shows the structure with 0. The upper side refers to the bezel 20 side, and the lower side refers to the middle frame 30 side.

First, a reflection plate, a light guide plate made of transparent acrylic, a fluorescent tube, an optical sheet, and the like are arranged on a lower frame of a pressed aluminum product. Next, from above,
The aluminum press middle frame 30 is covered.
Then, as shown in FIGS. 1 to 3, the liquid crystal panel 10 is placed on the middle frame 30. A bezel 20 of an aluminum pressed product is placed over the top. The liquid crystal panel 1 is formed by several claws 37 provided on the side surface of the bezel 20, front screw stops 16, and side screw stops 17.
The liquid crystal display device is completed with the 0, lower frame, middle frame 30 and the like fixed.

A method of fixing the position of the liquid crystal panel 10 when mounting the liquid crystal panel 10 on the middle frame 30 will be described. As shown in FIGS. 3 and 4, the L-shaped guides 1, 2, 3, 4 made of a plastic molded product
Attach to corner. The material is polycarbonate and non-halogen specification, but a general plastic material may be used. Guides 1 to 4 are 40mm x 40m
It is about mx 3 mm thick. The guides 1 to 4 have a diameter of φ2.5 mm × a height of 1 mm on the side of the middle frame 30 (lower side) so as to match a predetermined hole position of the middle frame 30.
Pins (protrusions) of degree 11, 12, 13, 21, 22, 3
1, 32, 41, and 42 are provided. Furthermore, on the bezel 20 side (upper side), a diameter φ2.5 mm × height 1 mm
Pins (projections) 23, 33, 43 are provided.

A description will be given of the case where the guide 1 is mounted on the upper left of the middle frame 30. The pins 11, 12, and 13 are fitted into predetermined holes of the middle frame 30. The position of the pin 11 serves as a reference. Since the holes into which the pins 12 and 13 are fitted are elongated holes, fine adjustment in the Y direction can be performed. And it fixes with the screw 5. Similarly, Guide 2
Fix 4 from. Pins 22, 31, and 42 are reference pins.

As described above, since the pins are provided below the guides 1 to 4, the positioning of the guides 1 to 4 can be easily performed. Further, since the reference position is determined, the positioning of the liquid crystal panel can be performed with high accuracy.

The pins 23, 33 and 43 are connected to the guides 2 to 4
In the vicinity, a gap is provided between the bezel 20 and the liquid crystal panel 10 to protect the liquid crystal panel and prevent contact of electric components.

In the guides 1 to 4, a portion where the edge of the liquid crystal panel 10 contacts is notched so that the edge of the liquid crystal panel 10 does not directly contact. Since the edge of the liquid crystal panel 10 does not contact the guides 1 to 4, the edge of the liquid crystal panel 10 is not broken or cracked.

The liquid crystal panel 10 is fitted over the middle frame 30 in which the guides 1 to 4 are fitted. A predetermined position of the liquid crystal panel 10 is determined by the guides 1 to 4.

A plurality of sides of the liquid crystal panel 10 have a TCP
35 is provided and connected to the drive circuit board via the TCP 35. The TCP 35 on the source substrate side is bent. Therefore, the outer shape of the liquid crystal display device can be reduced.

In portions other than guides 1 to 4, bezel 2
A spacer rubber or the like is provided in a gap between the liquid crystal panel 0 and the liquid crystal panel 10 to protect the liquid crystal panel 10 and prevent electrical components from contacting.

In the above description, four L-shaped guides are provided. However, even if L-shaped guides are provided in at least two of the four corners of the middle frame 30 on the bezel 20 side, the liquid crystal panel 10 Positioning is possible. For example, two guides may be provided diagonally, such as guide 1 and guide 4 and guide 2 and guide 3. Alternatively, two places may be provided at a corner on one side, such as guides 1 and 3, guides 2 and 4, guides 1 and 2, and guides 3 and 4. Furthermore, even if three L-shaped guides are provided, the liquid crystal panel 10 can be positioned. In that case, guides 1 to 4
You can omit one of them.

Since the guides 1 to 4 are small in shape, distortion, warping and twisting hardly occur even when molded with plastic, and the precision of the parts is improved. Therefore, positioning and fixing of the liquid crystal panel can be performed with high accuracy. Even if warping, warping, or twisting occurs, the shape is small, so that correction is easy.

Since the guides 1 to 4 have a small shape, the space for mounting the guides 1 to 4 can be reduced.
The outer shapes of the middle frame and the bezel can be reduced, and the size of the liquid crystal display device itself can be reduced.

Further, since the shapes of the guides 1 to 4 are small, the molding die is inevitably small, and the shape of the guide is simple, so that the cost required for manufacturing and managing the die can be reduced.

[0033]

Since the guide of the present invention has a small shape, even if it is molded with plastic, distortion, warping and twisting are unlikely to occur, and the precision of the parts is improved. Therefore, positioning and fixing of the liquid crystal panel can be performed with high accuracy.

Since the guide of the present invention has a small shape, the space for mounting the guides 1 to 4 can be reduced.
The outer shapes of the middle frame and the bezel can be reduced, and the size of the liquid crystal display device itself can be reduced.

Further, since the shape of the guide of the present invention is small, the molding die is inevitably small, and the cost required for manufacturing and managing the die can be reduced.

[Brief description of the drawings]

FIG. 1 is an assembly diagram showing a state in which a bezel 20 is mounted over a middle frame 30 on which a liquid crystal panel 10 is mounted.

FIGS. 2A and 2B are a front view and a side view of a liquid crystal display device configured by covering a bezel 20 from above the liquid crystal panel 10. FIGS.

FIG. 3 is a view showing a structure of a liquid crystal panel 10, a middle frame 30, and guides 1 to 4 with a bezel 20 removed.

FIG. 4 is a view showing the shapes of guides 1 to 4;

FIG. 5 is a front view of a liquid crystal display device of a conventional example configured by covering a bezel 20 from above the liquid crystal panel 10.

FIG. 6 is a view showing a structure of a liquid crystal panel 10, a middle frame 30, and guides 51 and 52 with a bezel 20 removed.

FIG. 7 is a view showing the shapes of guides 51 and 52.

[Explanation of symbols]

 1 2 3 4 Guide 5 Screw 10 Liquid crystal panel 11 12 13 Pin 16 17 18 19 Screw stop 20 Bezel 21 22 23 Pin 30 Medium frame 31 32 33 Pin 35 TCP 37 Claw 41 42 43 Pin 51 52 Guide 53 Guide rib

Claims (3)

[Claims] 1. A liquid crystal display device having a liquid crystal panel sandwiched between a first frame and a second frame, wherein at least two L corners of four corners of the second frame on the first frame side are provided. A liquid crystal display device comprising a letter-shaped guide. 2. The liquid crystal display device according to claim 1, wherein a positioning projection is provided on the second frame side of the L-shaped guide. 3. The L-shaped guide according to claim 1, wherein a projection for securing a gap between the first frame and the liquid crystal panel is provided on the first frame side. Liquid crystal display.