JP3627799B2 - Display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display device having a display panel such as a liquid crystal panel, and more particularly to a display panel holding structure.
[0002]
[Prior art]
A conventional liquid crystal display device is shown in FIG. (A) is a plan view, (b) is a side view, and (c) is a front view. The liquid crystal display device 1 includes a liquid crystal panel 4 for displaying an image and a metal frame 7 formed by press forming including punching, bending, and drawing. The frame 7 is formed in a frame shape in which an image display portion of the liquid crystal panel 4 is opened, and the periphery of the liquid crystal panel 4 is covered with the frame 7.
[0003]
When the AA sectional view is shown in FIG. 8, the liquid crystal panel 4 is installed on a chassis 8 made of a resin molded product, and is positioned by a protrusion 8 a formed on the chassis 8. The liquid crystal panel 4 is sandwiched by fitting and fixing the chassis 8 to the frame 7.
[0004]
The chassis 8 is formed in a frame shape in which an image display portion of the liquid crystal panel 4 is opened, and a backlight 5 is positioned and arranged on the bottom surface of the chassis 8 by fitting a boss (not shown). The backlight 5 has a light source 13 and emits a light beam emitted from the light source 13 in the direction of the liquid crystal panel 4 by the light guide plate 14. In addition, a diffusion sheet (not shown) that diffuses outgoing light and converts it into a uniform light beam is provided on the outgoing surface 14 a of the light guide plate 14.
[0005]
And it is attached by screwing to a housing etc. by the attaching part 1a (refer FIG. 7). Thereby, the liquid crystal panel 4 is irradiated with the light beam emitted from the backlight 5 to display an image. Reference numeral 11 denotes a drive board for driving the liquid crystal panel 4, and reference numeral 12 denotes a wiring board for connecting the liquid crystal panel 4 and the drive board 11.
[0006]
[Problems to be solved by the invention]
However, according to the conventional liquid crystal display device 1 described above, the chassis 8 is formed of a resin molded product. For this reason, a dimensional error occurs in the chassis 8 and a gap between the frame 7 and the frame 7 is increased. When a strong impact force is applied to the liquid crystal panel 4, the liquid crystal panel 4 falls off.
[0007]
Further, warpage occurs in the chassis 8 and a gap is formed between the chassis 8 and the liquid crystal panel 4. As a result, there is a problem that the liquid crystal panel 4 is destroyed when a strong impact force is applied to the liquid crystal panel 4, and the diffusion sheet disposed on the surface of the backlight 5 is distorted so that the liquid crystal panel 4 is not irradiated with a uniform light flux. There was also a problem.
[0008]
Further, since the frame 7 covers the peripheral portion of the liquid crystal panel 4, the planar shape becomes large. In particular, the liquid crystal panel 4 has recently become larger, and the area of the central opening that is punched out by press molding is large. Therefore, as the mold becomes larger, more material is discarded, which increases material costs and disposal costs. Therefore, this is a factor that increases the manufacturing cost of the liquid crystal display device 1.
[0009]
In addition, when the backlight 5 is broken and replaced, it is necessary to remove the screws of the four attachment portions 1a in order to remove the frame 7, and there is a problem that it takes a lot of maintenance work.
[0010]
9 is a detailed view of a portion B of FIG. 7, in order to bend the metal plate by press forming when manufacturing the frame 7, between the adjacent two sides of the outer periphery of the frame 7. An escape portion 7h is provided. For this reason, dust or the like easily enters the liquid crystal display device 1, which causes the liquid crystal display device 1 to fail.
[0011]
The above problem is not limited to the liquid crystal display device 1 using the liquid crystal panel 4, and similarly occurs in a display device such as a plasma display panel using another display panel.
[0012]
It is an object of the present invention to provide a display device that can prevent the display panel from dropping or breaking. Another object of the present invention is to provide a display device capable of reducing the cost.
[0013]
Another object of the present invention is to provide a display device capable of reducing the number of maintenance work steps. It is another object of the present invention to provide a display device that can prevent a failure due to intrusion of dust.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the present invention includes a display panel for displaying an image, and a frame for covering the periphery of the display panel and holding the display panel, and the frame is a different part on the display panel. a formed Ru display device from a plurality of frame members for covering, and the this and features made of the frame connecting portions were connected by two screws arranged in the thickness direction of said frame member.
[0015]
The present invention is a display device having the above structure is characterized in that over the back surface of the display panel by the frame to sandwich the Display panel.
[0016]
According to the present invention, in the liquid crystal display device having the above-described configuration, the frame is formed by connecting two frame members having an L-shaped planar shape.
[0017]
According to the present invention, in the liquid crystal display device configured as described above, the frame is formed by connecting a U-shaped frame member and an I-shaped frame member in plan view.
[0018]
According to the present invention, in the liquid crystal display device configured as described above, the frame is made of metal .
[0019]
In addition, the present invention includes a display panel that displays an image, and a frame that covers a peripheral portion on the display panel and holds the display panel, and the frame includes a plurality of frame members that cover different portions on the display panel. The plane shape is formed by connecting a U-shaped frame member and an I-shaped frame member, the U-shaped frame member is made of metal, and the I-shaped frame member is made of resin. It is characterized by.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. For convenience of explanation, the same parts as those in FIGS. 1A, 1B, and 1C are a plan view, a side view, and a front view showing the liquid crystal display device of the first embodiment, and FIG. 2 is a perspective view. The liquid crystal display device 1 includes a liquid crystal panel 4 that displays an image, and the periphery of the liquid crystal panel 4 is covered with a frame 7.
[0021]
The frame 7 is composed of two frame members 7a and 7b whose planar shape is L-shaped. 3 and 4 are detailed views of the portion D. A connecting portion 7c is formed at the end of the frame member 7a, and a recess 7d is formed at the end of the frame member 7b. The coupling member 7c and the recess 7d are fixed by screws 6 to connect the frame members 7a and 7b.
[0022]
As a result, the image display portion of the liquid crystal panel 4 is opened to cover the entire circumference. The frame members 7a and 7b are formed by subjecting a metal plate such as stainless steel, aluminum, or iron to press forming by bending and drawing, and the bent portion 7g is welded for strength reinforcement.
[0023]
5 is a cross-sectional view taken along the line C-C in FIG. 1, the liquid crystal panel 4 is installed on the backlight 5, and the cross-sectional shape of the frame 7 is formed in a U shape so It is pinched together.
[0024]
The backlight 5 has a light source 13 and emits a light beam emitted from the light source 13 in the direction of the liquid crystal panel 4 by the light guide plate 14. In addition, a diffusion sheet (not shown) that diffuses outgoing light and converts it into a uniform light beam is provided on the outgoing surface 14 a of the light guide plate 14.
[0025]
The mounting portion 1a (see FIG. 1) is screwed to attach the liquid crystal display device 1 to a housing or the like. Thereby, the liquid crystal panel 4 is irradiated with the light beam emitted from the backlight 5 to display an image. Reference numeral 11 denotes a drive board for driving the liquid crystal panel 4, and reference numeral 12 denotes a wiring board for connecting the liquid crystal panel 4 and the drive board 11. Reference numeral 3 denotes a buffer material made of silicon rubber or the like, which fills the gap between the liquid crystal panel 4 and the side wall 7j of the frame 7 and stably fixes the liquid crystal panel 4.
[0026]
According to the present embodiment, since the frame 7 is divided, the frame members 7a and 7b can be fixed by optimally adjusting the fitting gap with the liquid crystal panel 4. For this reason, it is possible to prevent the liquid crystal panel 4 from falling off when a strong impact force is applied to the liquid crystal panel 4.
[0027]
Further, by dividing the frame 7, parts (frame members 7a and 7b) can be miniaturized, the mold can be miniaturized, and can be formed by bending or drawing without punching. As a result, the waste material is reduced, and the material cost and the disposal cost can be reduced. Furthermore, since the backlight 5 can be slid and replaced only by removing one frame member 7a when the backlight 5 breaks down, the number of maintenance work can be reduced.
[0028]
Further, since the connecting portion 7c provided on the frame member 7a covers the end of the frame member 7b and is connected by the screw 6, it is possible to prevent dust from entering and prevent the liquid crystal display device 1 from being broken.
[0029]
Further, since the conventional resin chassis 8 (see FIG. 8) is not required, the number of parts can be reduced, and the frame 7 is made of metal, so that the strength is ensured even if the plate thickness is thinner than the chassis 8. Thus, since the liquid crystal panel 4 can be held, the liquid crystal display device 1 can be thinned.
[0030]
Furthermore, the liquid crystal panel 4 can be installed on the light guide plate 14 without a gap. For this reason, when a strong impact force is applied to the liquid crystal panel 4, the liquid crystal panel 4 can be prevented from being broken, and the diffusion sheet disposed on the surface of the backlight 5 is prevented from being distorted to emit a uniform light flux. Can be irradiated.
[0031]
Next, FIG. 6 is a diagram showing a liquid crystal display device of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. The difference from the first embodiment is that the frame 7 is configured by combining a U-shaped frame member 7e and an I-shaped frame member 7f in plan view. Other parts are the same as those in the first embodiment.
[0032]
According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, since the frame member 7e is formed in a U-shape, the strength is improved as compared with the L-shaped frame members 7a and 7b (see FIG. 1), and the liquid crystal disposed inside even when an impact is applied to the liquid crystal display device 1. The panel 4 and the backlight 5 can be protected.
[0033]
Further, the I-type frame member 7f may be formed of a resin molded product. In this way, even if it collides with the liquid crystal panel 4, it is buffered, so that the buffer material 3 (see FIG. 5) as in the first embodiment can be omitted, and the number of parts can be reduced.
[0034]
In the first and second embodiments, the liquid crystal display device using the liquid crystal panel has been described. However, the same configuration is applied to display devices such as plasma display panels, EL display devices, and PALC display devices having other display panels. A similar effect can be obtained.
[0035]
【The invention's effect】
According to the present invention, since the frame is divided, the frame member can be fixed by optimally adjusting the fitting gap between the display panel and the frame. For this reason, it is possible to prevent the liquid crystal panel from falling off when a strong impact force is applied to the display panel.
[0036]
Also, by dividing into multiple frame members, the parts can be miniaturized, the mold can be miniaturized, and it can be formed by bending or drawing without punching, reducing waste materials and reducing material costs. And disposal costs can be reduced. Furthermore, when an internal part such as a backlight breaks down, the internal part can be slid and replaced simply by removing one frame member, so that the number of maintenance work steps can be reduced.
[0037]
In addition, according to the present invention, since the back surface of the display panel is covered and sandwiched by the frame, a conventional resin chassis is not required. For this reason, the number of parts can be reduced, and the display panel can be installed on the light guide plate or the like without a gap. As a result, when a strong impact force is applied to the display panel, the display panel can be prevented from being destroyed, and the liquid crystal panel can be irradiated with a uniform light flux by preventing distortion of the diffusion sheet disposed on the surface of the backlight. Can do.
[0038]
In addition, according to the present invention, since the two L-shaped frame members are connected, there is no need for a conventional escape portion for bending, and dust can be prevented from entering to prevent a failure of the liquid crystal display device. be able to. Further, according to the present invention, since the frame member is made of metal, the liquid crystal panel can be held with sufficient strength even when the frame thickness is made thinner than that of the conventional chassis, so that the liquid crystal display device can be thinned. it can.
[0039]
In addition, according to the present invention, the U-shaped frame member and the I-shaped frame member are connected to prevent dust from entering, and the U-shaped frame member is stronger than the L-shaped frame member. Even when an impact is applied to the liquid crystal display device, the display panel disposed inside can be protected. In addition, since the I-shaped frame member is made of resin, it is buffered even when it collides with the liquid crystal panel, so there is no need to provide a separate cushioning material.
[Brief description of the drawings]
FIG. 1 is a diagram showing a liquid crystal display device according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing the liquid crystal display device of the first embodiment of the present invention.
FIG. 3 is a detailed view of a portion D in FIG. 1;
4 is a detailed view of a portion D in FIG. 1. FIG.
FIG. 5 is a cross-sectional view taken along the line CC of FIG.
FIG. 6 is a diagram showing a liquid crystal display device according to a second embodiment of the present invention.
FIG. 7 is a diagram showing a conventional liquid crystal display device.
FIG. 8 is a cross-sectional view taken along the line AA of FIG.
FIG. 9 is a detailed view of part B in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 3 Buffer material 4 Liquid crystal panel 5 Backlight 7 Frame 7a, 7b, 7c, 7d Frame member 11 Drive board 13 Light source 14 Light guide plate

Claims (6)

A display panel for displaying an image, and a frame for holding the display panel over the peripheral portion on the display panel, the frame Ru formed from a plurality of frame members for covering different portions of the upper and the display panel Viewing A display device comprising the frame, wherein the frame member is connected by two screws arranged in the thickness direction. The display device according to claim 1, characterized in that sandwich the Display panel covers the rear surface of the display panel by the frame. 3. The display device according to claim 1, wherein the frame is formed by connecting two frame members having a planar shape of an L shape. 4. The display device according to claim 1, wherein the frame is formed by connecting a frame member having a U-shaped planar shape and an I-shaped frame member. The display device according to claim 1, wherein the frame is made of metal. A display panel for displaying an image, and a frame for covering the periphery of the display panel and holding the display panel,
The frame is composed of a plurality of frame members covering different parts on the display panel, and the planar shape is formed by connecting a U-shaped frame member and an I-shaped frame member,
The U-shaped frame member is made of metal, and the I-shaped frame member is made of resin.

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