JPH1165484A - Video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a device to perform easily the attaching and the detaching of a display panel and to enable the device to evade the deformation of the display panel by fixing the display panel to a frame chassis and arranging a spacer between the display panel and the frame chassis. SOLUTION: An internal unit 26 consists of a frame chassis 28 made of aluminium, a PDP(display panel) 32 attached to the front plane of this frame chassis 28 with plural screws 30, a heat conductive sheet 34 and plural circuit boards 3b. Moreover, a spacer is arranged between the PDP 32 near to a fixing member 40 and the frame chassis 28. Thereby, deformation caused in the back plate of the PDP 32 through the fixing member 40 at the time of tightening the screw 30 can be suppressed. Further, as the PDP 32 is attached to the frame chassis 28 by the screws, the attaching and the detaching of the PDP 32 can be easily performed. Therefore, a handling time, a time and a cost required for repair can be largely reduced, maintainability and serviceability at the time of exchanging the PDP 32 can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device such as a plasma display, and more particularly to a structure for mounting a display panel inside a housing thereof.

[0002]

2. Description of the Related Art In recent years, a plasma display panel (hereinafter referred to as a PD) has been used as a thin, lightweight image display device having a large screen.
P) is being put to practical use. This PDP device usually includes a frame chassis inside a housing,
A PDP formed by bonding two glass substrates is attached to the front of the frame chassis. Until now, it has been general to fix the PDP to the frame chassis with a strong double-sided adhesive tape.

[0003] In addition, the PDP is heated to a considerably high temperature due to internal discharge during light emitting display. PDP if you leave this
It is necessary to suppress the temperature to a predetermined temperature or less because it may lead to breakage of the device. As an effective method therefor, as shown in FIG. 8, when the PDP 32 is fixed by the double-sided adhesive tape 2 disposed around the frame chassis 28, a heat conductive sheet 34 is provided between the frame chassis 28 and the PDP 32.
A method has been proposed in which the heat generated in the PDP 32 by the sheet 34 is efficiently conducted to the frame chassis 28 for heat dissipation.

[0004]

However, once the PDP is fixed with a strong double-sided adhesive tape, it is extremely difficult to remove the PDP from the frame chassis later. Therefore, even when the PDP needs to be replaced due to a failure or damage at the user's site, a service person or the like cannot replace the PDP alone on the spot, and replaces the PDP with the frame chassis. It takes time and effort to transport the entire PDP device to the manufacturer, replace the PDP, and then transport the PDP device to the user again. In any case, there is a problem that the repair cost increases.

As shown in FIG. 7, the PDP 32 is adhered and fixed to the frame chassis 28 in the peripheral area thereof, so that the PDP 32 has a close contact with the heat conductive sheet 34.
There is also a problem that the heat transfer efficiency becomes worse in the central region of No. 2 and the heat conduction efficiency is lower than that in the peripheral region.

[0006]

In order to solve the above-mentioned problems, a video display device according to the present invention is provided with a plurality of fixing members on the back of a display panel, and the display panel is framed using these fixing members. While fixing to the chassis,
A spacer is arranged between the display panel and the frame chassis near the fixing member.

Further, the spacer may be formed of the same member integrated with the fixing member.

[0008] The display panel is not limited to a PDP.
For example, a liquid crystal panel may be used.

In this video display device, a heat conductive sheet is interposed between the display panel and the frame chassis, and the fixing member is arranged not only in the peripheral region of the display panel but also in the central region thereof. Is preferred.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a plurality of fixing members are provided on a back surface of a display panel, and the display panel is fixed to a frame chassis using these fixing members. The display panel is provided near the fixing member and includes a spacer disposed between the display panel and the frame chassis. With such a configuration, the display panel can be easily attached and detached. And deformation of the display panel can be avoided.

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a plasma display device (video display device) 10 according to one embodiment of the present invention. This plasma display device 10
Includes a front housing portion 14 and a back housing portion 16 that are combined into one to form the housing 12, and an internal unit 26 housed in the housing 12. A plurality of ventilation holes 18 are provided on the upper and lower
20 is formed in the width direction, and has a light transmitting portion 22 made of glass or the like on the front surface thereof. In addition, a plurality of ventilation holes 18 are also provided on the upper and lower portions of the back housing portion 16, respectively.
20 (only the upper ventilation hole 18 is shown) is formed in the width direction.

The internal unit 26 is interposed between an aluminum frame chassis 28, a PDP (display panel) 32 attached to a front surface of the frame chassis 28 by a plurality of screws 30, and the frame chassis 28 and the PDP 32. Thermal conductive sheet 34 made of silicon or the like
And a plurality of circuit boards 36 supported on the back of the frame chassis 28. The heat conductive sheet 34 is a PDP
32 to efficiently transfer the heat of 32 to the frame chassis 28. The circuit board 36 is a PDP 32
And controls the light emission of the device.

The PDP 32 has a front plate and a back plate, and although not shown in the drawing, the front plate is longer in the long side direction and shorter in the short side direction than the back plate. Therefore, the front plate and the rear plate each have a portion that does not overlap each other, and a terminal connected to an electrode in the PDP 32 is formed in the non-overlapping portion (not shown).

A plurality of film-like wirings (not shown) having male connectors at the ends are crimped to the terminals, and the male connectors are provided at the edges of each circuit board 36 (see FIG. 1). 2), each circuit board 36 and the PDP 32 are electrically connected.

As shown in FIGS. 1 and 2, a plurality of fixing bosses (fixing members) 40 are provided on the back surface of the PDP 32. In the present embodiment, five fixed bosses 40 are arranged in the peripheral area and the central area of the PDP 32. However, it is confirmed by a drop impact test that if the number of the installed bosses is at least three or more, they can withstand the strength. For example, as shown in FIG.
Twelve fixed bosses 40 may be arranged in the peripheral area and central area of the PDP 32. In addition, as described later, the PDP 32
The fixing bosses 40 are preferably arranged evenly with respect to the PDP 32 in order to bring the heat conductive sheet 34 and the heat conductive sheet 34 into close contact with each other.

The shape of the fixed boss 40 is shown in FIGS.
As shown in (c), various shapes are conceivable.
The fixing boss 40 is formed by molding or cutting using a metal or a synthetic resin, and has a female screw portion 42 at the center thereof. As shown in FIG. 5, the PDP 32 is fixed to the frame chassis 28 with screws 30 using the female screw portions 42.

The fixing boss 40 is bonded and fixed to the PDP 32 by a thermosetting double-sided tape 44. Thermal conductive sheet 3
4 has an opening 46 corresponding to the fixing boss 40.

Further, the frame chassis 28 is also formed with a truncated conical recess 48 corresponding to the fixing boss 40 by molding or pressing. A through hole 50 is formed in the bottom surface of the recess 48. As a result, the screw 30 is screwed from the back of the frame chassis 28 to the spring washer 5.
2 and the washer 54, and inserted into the through hole 50 and fastened to the female screw portion 42 of the fixing boss 40, the PDP 32
Is attached to the frame chassis 28. When the PDP 32 needs to be replaced later, the PDP 32 can be removed from the frame chassis 28 by loosening the screw 30.

The PDP 32 near the fixing member 40
A spacer 47 is arranged between the frame chassis 28 and the frame chassis 28. Thus, when the screw 30 is tightened, the PDP 32 is fixed via the fixing boss 40 and the thermosetting double-sided tape 44.
Can be suppressed, and a gap distance between two glasses (a front plate and a back plate) constituting the display panel can be kept constant, so that a stable image can be displayed. it can.

As described above, the PDP device 10 of the present embodiment
Since the PDP 32 is attached to the frame chassis 28 by screwing, the PDP 32 can be easily attached and detached. Therefore, when it is necessary to replace the PDP 32 at the user's site, a service person or the like can replace the PDP device on the spot without sending back the entire PDP device to the manufacturer, so that the labor, time and cost required for repair can be greatly reduced, and Maintenance and serviceability during replacement are improved. Also, at the time of assembling, the labor of attaching a double-sided adhesive tape for fixing the PDP 32 as in the related art can be omitted, so that the assembling process can be simplified.

Further, since the spacer 47 is arranged between the PDP 32 near the fixing member 40 and the frame chassis 28, the deformation of the rear panel of the PDP 32 caused when the screw 30 is tightened can be suppressed, and the display panel 32 is constituted. Since the gap distance between the two glasses (the front plate and the back plate) can be kept constant, a stable image can be displayed.

Further, the PDP 32 is connected to the frame chassis 2
8, when the screws 30 are tightened with the same torque, the fixing bosses 40 are evenly arranged in the peripheral area and the central area of the PDP 32. Therefore, the adhesion of the heat conductive sheet 34 and the heat conduction efficiency thereof are improved. Can be made uniform over the entire area of the PDP 32.

As shown in FIG. 6, the spacer 47 may be bonded and fixed to the PDP 32 using a thermosetting double-sided tape 48. Thereby, the positioning work of the spacer 47 at the time of assembly can be facilitated.

Further, as shown in FIG. 7, a structure in which the spacer and the fixed boss 40 are integrated may be employed. Thereby, cost can be suppressed and working time can be shortened.

In this embodiment, the display panel has a PDP.
Although the present invention has been described with reference to a video display device using the present invention, the present invention can be applied to a video display device other than a PDP such as a liquid crystal panel or a field emission display.

[0026]

According to the video display device of the present invention, the display panel is attached to the frame chassis by screws or the like via the fixing member, so that the display panel can be easily attached and detached. Not only is the maintenance and serviceability improved, but also during assembly of the apparatus, the labor for applying double-sided adhesive tape can be omitted, and the assembly process can be simplified.

In addition, since the spacer is arranged between the display panel and the frame chassis near the fixing member, deformation of the display panel caused by tightening stress such as screwing can be avoided. Since the gap distance between the two glasses (the front panel and the rear panel) constituting the display panel can be kept constant, a stable image can be displayed.

Further, when the fixing member is provided also in the central region of the display panel and the heat conductive sheet is interposed between the display panel and the frame chassis, the screws or nuts corresponding to the fixing member in the central region are tightened. Thus, the adhesiveness with the heat conductive sheet in the central region of the display panel can be improved, and the heat conduction efficiency can be made uniform over the entire region of the display panel.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a PDP device according to the present invention.

FIG. 2 is a rear view of a frame chassis of the PDP device according to the present invention.

FIG. 3 is a rear view of a frame chassis of the PDP device according to the present invention.

FIG. 4 is a view showing the types of shapes of fixed bosses in the present invention.

FIG. 5 is a partial cross-sectional view near a fixing boss when a spacer is used as a single member in the PDP device according to the present invention.

FIG. 6 is a partial cross-sectional view near a fixing boss when a thermosetting double-sided tape is used for a spacer end surface in the PDP device according to the present invention.

FIG. 7 is a partial cross-sectional view near the fixing boss when the spacer and the fixing boss are integrated in the PDP device according to the present invention.

FIG. 8 is a diagram showing a method of fixing a conventional PDP device to a frame chassis.

[Explanation of symbols]

 Reference Signs List 10 plasma display device 28 frame chassis 32 plasma display panel (display panel) 34 heat conductive sheet 40 fixing boss (fixing member) 47 spacer 48 thermosetting double-sided tape

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazunori Kojima 1006 Kadoma Kadoma, Osaka Pref.Matsushita Electric Industrial Co., Ltd. (72) Inventor Shigeo Hirano 1006 Kadoma Kadoma, Osaka Pref.Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] A plurality of fixing members provided on a back surface of the display panel, the display panel is fixed to a frame chassis by using the fixing members, and the display panel and the frame are located near the fixing members. An image display device comprising: a spacer disposed between chassis. 2. The image display device according to claim 1, wherein the spacer is integrated with the fixing member. 3. The display device according to claim 1, wherein a heat conductive sheet is interposed between the display panel and the frame chassis, and the fixing member is disposed not only in a peripheral region of the display panel but also in a central region thereof. Video display device.