JP2004317919A - Plane display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a plane display device such as a plasma display device more low-cost. <P>SOLUTION: The plane display device has a panel unit constituted by arranging a circuit block which makes display by applying a signal to a display panel on the back side of a chassis member having the display panel arranged on the front side and a back cover 13 which constitutes a housing with a front cover protecting the front side of the panel unit and also is attached to the chassis member so as to cover the back side of the panel unit, and the back cover 13 comprises a center cover 16 covering the center part of the panel unit and right and left side covers 17 fitted to both right and left sides of the center cover 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flat display device such as a plasma display device which is known as a large screen, thin, and lightweight display device.
[0002]
[Prior art]
2. Description of the Related Art In recent years, a plasma display device has attracted attention as a display panel (thin display device) having excellent visibility, and higher definition and a larger screen are being promoted.
[0003]
This plasma display device is roughly classified into an AC type and a DC type in terms of driving, and there are two types of discharge types, a surface discharge type and a counter discharge type. At present, an AC-type and surface-discharge type plasma display device has become the mainstream due to its characteristics.
[0004]
In such a plasma display device, a plasma display panel (hereinafter referred to as a panel) in which a pair of transparent glass substrates are opposed to each other so that a discharge space is formed therebetween, and an electrode group is arranged on the glass substrate. And a display drive circuit block attached to the chassis member and applying a signal to the panel to perform display by applying a signal to the panel module, and the panel module is covered with a housing to complete the panel module. (See Patent Document 1).
[0005]
Such a plasma display device has a feature that a large screen is easily realized as compared with other display devices such as a liquid crystal display device and a CRT, and a clearer image is obtained as compared with other large display devices. For this reason, it has attracted attention as an information display device in a place where many people gather and as an image device that can enjoy powerful images at home.
[0006]
[Patent Document 1]
Japanese Patent No. 2807672
[Problems to be solved by the invention]
2. Description of the Related Art Conventionally, in a flat display device such as a plasma display device of this type, a back cover forming a part of a housing is formed in an integral shape by pressing a metal plate.
[0008]
However, flat-panel display devices such as plasma display devices are large in size, and if a metal back cover is to be worked by pressing with a single piece, a considerably large press machine is required. They were large, very difficult to handle, poor in productivity, and expensive.
[0009]
The present invention has been made in view of such problems, and has as its object to realize cost reduction in a flat display device such as a plasma display device.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a flat panel display device, comprising: a back cover constituting a housing, a center cover covering a center portion of a panel unit, and left and right side attached to left and right sides of the center cover. It is configured with a cover.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
That is, the invention according to claim 1 of the present invention is directed to a panel unit configured by arranging a drive circuit block for applying a signal to the panel and performing display on a rear side of a chassis member having a display panel arranged on the front side. And a back cover that forms a housing with a front cover that protects the front side of the panel unit and is attached to the chassis member so as to cover the rear side of the panel unit. It comprises a central cover that covers the center of the unit, and left and right side covers that are attached to the left and right sides of the central cover.
[0012]
According to a second aspect of the present invention, in the first aspect, a stepped portion that is bent inward is provided at one of the connecting portions of the center cover and the side cover, and the other connecting portion is overlapped with the stepped portion. They are combined together.
[0013]
According to a third aspect of the present invention, in the first aspect, a hole is provided in one of the connecting portions of the center cover and the side cover, and the other of the connecting portions is inserted into the hole, and the peripheral portion of the hole is provided in the peripheral portion of the hole. It is provided with a tube portion to be crimped.
[0014]
Hereinafter, a flat display device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7 taking a plasma display device as an example, but embodiments of the present invention are not limited thereto. .
[0015]
First, the structure of a display panel in a plasma display device will be described with reference to FIG. As shown in FIG. 1, a plurality of rows of stripe-shaped display electrodes 2 formed of a pair of scan electrodes and sustain electrodes are formed on a transparent front substrate 1 such as a glass substrate, and cover the electrode group. A dielectric layer 3 is formed as described above, and a protective film 4 is formed on the dielectric layer 3.
[0016]
A plurality of rows of stripes covered with an overcoat layer 6 are provided on a rear substrate 5 opposed to the front substrate 1 so as to intersect with the display electrodes 2 of scan electrodes and sustain electrodes. Address electrodes 7 are formed. A plurality of partitions 8 are arranged on the overcoat layer 6 between the address electrodes 7 in parallel with the address electrodes 7, and the phosphor layers 9 are provided on the side surfaces between the partitions 8 and on the surface of the overcoat layer 6. I have.
[0017]
The substrate 1 and the substrate 5 are opposed to each other with a minute discharge space therebetween so that the display electrode 2 of the scan electrode and the sustain electrode and the address electrode 7 are substantially orthogonal to each other, and the periphery thereof is sealed. In the discharge space, one or a mixed gas of helium, neon, argon, and xenon is sealed as a discharge gas. The discharge space is partitioned into a plurality of partitions by partition walls 8, so that a plurality of discharge cells are provided at intersections between the display electrodes 2 and the address electrodes 7, and each of the discharge cells has a red, green, and blue color. The phosphor layers 9 are sequentially arranged for each color such that
[0018]
FIG. 2 shows an electrode arrangement of this panel. As shown in FIG. 2, scan electrodes, sustain electrodes and address electrodes have a matrix configuration of M rows × N columns, and M rows of scan electrodes are arranged in the row direction. SCN1 to SCNM and sustain electrodes SUS1 to SUSM are arranged, and N columns of address electrodes D1 to DN are arranged in the column direction.
[0019]
In a panel having such an electrode configuration, an address discharge is performed between the address electrode and the scan electrode by applying a write pulse between the address electrode and the scan electrode, and after selecting a discharge cell, the scan electrode and the sustain By applying a periodic sustain pulse that is alternately inverted between the electrodes, sustain discharge is performed between the scan electrode and the sustain electrode to perform a predetermined display.
[0020]
FIG. 3 is an exploded perspective view showing an example of the overall configuration of a plasma display device incorporating the display panel having the structure described above. In the figure, a display panel 10 is held by being bonded to a front surface of a chassis member 11 made of aluminum or the like via a heat conductive sheet 11a, and a rear surface side of the chassis member 11 is used for driving the display panel 10 for display. Are mounted, thereby constituting a panel unit. The heat conductive sheet 11a is for efficiently transmitting heat generated in the display panel 10 to the chassis member 11 to perform heat radiation. Further, the circuit block 12 includes an electric circuit for performing display driving of the display panel 10 and controlling the display panel 10. They are electrically connected by a plurality of flexible wiring boards extending over the straddle.
[0021]
A housing for accommodating the panel unit includes a back cover 13 disposed so as to cover a rear side on which the circuit block 12 of the panel unit is disposed, and a display panel 10 disposed on the front side of the display panel 10 of the panel unit. It has a window 14a corresponding to the display area of the panel 10 and a metal front frame 14 which covers the periphery other than the display area. The window 14a of the front frame 14 also serves as an optical filter and protection of the display panel 10. A front glass 15 is disposed. The front glass 15 is provided with a transparent conductive film in order to suppress unnecessary radiation of electromagnetic waves. Further, the back cover 13 is provided with a plurality of ventilation holes 13a for releasing heat generated in the display panel 10 and the like to the outside.
[0022]
4 and 5 show the back cover 13. As shown in FIGS. 4 and 5, the back cover 13 includes a metal central cover 16 covering the center of the panel unit and a metal cover such as iron attached to the left and right sides of the central cover 16. And the right and left side covers 17, and the back cover 13 is formed by connecting the side covers 17 to both sides of the center cover 16. Each of the center cover 16 and the side cover 17 is formed by pressing a metal plate, and a flange 13b is formed on a peripheral portion of the chassis member 11 to be attached to the chassis member 11 with screws.
[0023]
FIG. 6 and FIG. 7 show the connecting portion of the back cover. As shown in FIGS. 6 and 7, the connecting portion 16 a at both ends of the center cover 16 is provided with a step portion 16 b bent inward, and the connecting portion of the side cover 17 is provided at the step portion 16 b. The center cover 16 and the side cover 17 are joined together by superposing 17a. By providing the step 16b, the outer surfaces of the center cover 16 and the side cover 17 can be made substantially flush. In addition, the center cover 16 and the side cover 17 are connected by providing a hole 16c in the step portion 16b and inserting the cylindrical portion 17b provided in the connecting portion 17a of the side cover 17 into the hole 16c to form a hole in the peripheral portion of the hole 16c. It is performed by caulking.
[0024]
In the above-described embodiment, the step portion is provided on the center cover 16. However, a step portion may be provided on the side cover 17, or a hole may be provided on the side cover 17, and a cylindrical portion may be provided on the center cover 16. Caulking may be performed. Further, other than the caulking, the center cover 16 and the side cover 17 may be connected by spot welding or the like.
[0025]
As described above, according to the configuration of the present embodiment, since the back cover 13 is composed of the center cover 16 and the side cover 17, they may be formed by press working and joined together, so that 50 inches The back cover 13 of the plasma display device having a small size can be press-formed even with a small machine without using a large-sized press machine. A back cover can be obtained.
[0026]
【The invention's effect】
As described above, according to the present invention, it is possible to further reduce the cost of a flat display device such as a plasma display device, and to obtain an effect that a large display device can be provided at low cost. .
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing the configuration of a plasma display panel. FIG. 2 is an electrode wiring diagram of the panel. FIG. 3 is an exploded perspective view showing the entire plasma display device according to an embodiment of the present invention. FIG. 5 is an exploded view of the back cover. FIG. 6 is an enlarged cross-sectional view showing a joint of the back cover. FIG. 7 is an enlarged cross-sectional view showing a structure of the joint of the back cover. Figure [Explanation of symbols]
Reference Signs List 10 Display panel 11 Chassis member 12 Circuit block 13 Back cover 16 Central covers 16a, 17a Coupling portion 16b Step 16c Hole 17 Side cover 17b Tube portion

Claims (3)

A panel unit configured by arranging a drive circuit block for applying a signal to the panel to perform display on the rear side of a chassis member having a display panel disposed on the front side, and a front cover for protecting the front side of the panel unit. A back cover that constitutes a housing and is attached to the chassis member so as to cover the rear side of the panel unit; the back cover includes a central cover that covers a central portion of the panel unit; A flat display device comprising left and right side covers attached to both left and right sides. 2. The flat display device according to claim 1, wherein a step portion bent inside is provided at one of the connection portions of the center cover and the side cover, and the other connection portion is overlapped and connected to the step portion. 2. The flat mold according to claim 1, wherein a hole is provided in one of the connecting portions of the center cover and the side cover, and a cylindrical portion which is inserted into the hole and is caulked at a peripheral portion of the hole is provided in the other connecting portion. Display device.

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