JP2000133955A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and easily subdivide and reassemble a packaged case on user side at an arbitrary time by dividing the packaged case into a back packaged case and a front packaged case and storing a circuit board in the back packaged case so that it is not exposed at the time of division. SOLUTION: A packaged case 11 is formed of a back packaged case 11a storing a plasma display panel PDP and a circuit board 4 and storing a latter half part and a front packaged case 11b covering a front half part engaged with the case 11a. At the time of division, only the front packaged case 11b is taken out and an electric circuit element group is not exposed in the assembly part of PDP, the circuit board and the back packaged case 11a, which are left. Thus, the front packaged case 11b can safely and easily be taken out on a user side. Then, a PDP video face can easily be cleaned and an optical filter 8 fitted to the window 12 of the front packaged case 11b can be cleaned/ exchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device which facilitates cleaning of an image surface of a plasma display panel and an optical filter located in front thereof, and replacement of the optical filter.

[0002]

2. Description of the Related Art A conventional plasma display device includes a plasma display panel having an image plane (hereinafter simply referred to as a PDP) and a circuit board on which an electric circuit element group for controlling and driving the plasma display panel is mounted. In many cases, the optical filter is accommodated in an exterior case having a front window corresponding to the surface, and an optical filter is attached to the front surface of the PDP in the exterior case for light transmittance adjustment or color adjustment.

FIG. 4 is a front view showing a conventional plasma display device, and FIG. 5 is an exploded sectional view showing an exploded section taken along line AA of FIG. 4 and 5, reference numeral 1 denotes a PDP having an image surface 1a, and reference numeral 2 denotes a support plate for supporting the PDP on one surface by, for example, a double-sided adhesive tape 3 or the like. Is provided with a mounting hole 2a for mounting to an exterior case described later. Reference numeral 4 denotes a circuit board supported on the other surface of the support plate 2 at an interval 5 and is not shown in the drawing.
A large number of electric circuit element groups for controlling and driving the PDP 1 are mounted on the circuit board 4. 6 is the support plate 2
A nut which also serves as a spacer for securing the above-mentioned space 5 fixed to the circuit board 4. The circuit board 4 can be firmly attached to the support plate 2 by the bolt 7.

[0004] Reference numeral 8 denotes an optical filter disposed on the front surface of the PDP 1, and 9 denotes a support frame which supports the optical filter 8 around the periphery thereof, for example, with a double-sided adhesive tape 10 or the like. At four locations, mounting holes 9a are provided for mounting to an exterior case described later. Reference numeral 11 denotes an outer case that houses the PDP 1, the circuit board 4, and the optical filter 8, and is composed of a rear outer case 11a that houses the rear half, and a front outer case 11b that houses the front half fitted to the outer case. You. Reference numeral 12 denotes a window provided on the front exterior case 11b at a position corresponding to the image surface 1a of the PDP 1, and 13 denotes a connecting means for detachably coupling the front exterior case 11b and the rear exterior case 11a. A nut 13a provided on the case 11b, a stud bolt 13c one end of which is screwed into the nut via a spring washer 13b, and the stud in a state where the front outer case 11b and the rear outer case 11a are fitted. A screw 13d screwed into the other end of the bolt 13c is formed. The outer casings 11a and 11b are integrally assembled by the coupling means 13 to form the outer casing 11.

Although the description has been made before and after, both outer cases 11a,
11b, the stud bolt 13c is passed through the mounting holes 2a, 9a of the support plate 2 and the support frame 9, respectively, and then screwed into the nut 13a.
And the circuit board 4 is connected to the outer case 11 via the support plate 2.
It is securely housed inside. Further, the optical filter 8 is securely supported on the front surface of the PDP 1 via the support frame 9.

[0006]

The conventional plasma display device is constructed as described above, and the viewer can view the PDP 1 through the window 12 of the outer case 11 through the optical filter 8.
You will see the image projected on the image surface of the. However, depending on the use of the camera for a long time or the installation place of the apparatus, foreign matter such as dust adheres to the image surface of the optical filter 8 and the image plane of the PDP 1, resulting in a loss of a clear image.
Therefore, it is necessary to periodically clean the surfaces of the optical filter 8 and the PDP 1 using a detergent or the like. Further, when it is desired to make the contrast and contrast of an image exceptional or to emphasize a certain color, it is necessary to replace the optical filter 8 with a special filter that can meet the demand.

However, when the filter 8 is cleaned or replaced, P
In order to clean the image surface of DP1, the outer case 11 must be disassembled and the filter 8 and the PDP 1 must be taken out. However, in the conventional plasma display device, the outer case 11 is disassembled by first removing the screw 13d to remove the rear outer case 11a, and then removing the stud bolt 13
c, the front exterior case 11b, the support plate 2 and the support frame 9 are disassembled to clean the image surface of the PDP 1 on the support plate 2 and to clean or replace the optical filter 8 on the support frame 9. Become.

However, in the conventional apparatus, not only the support frame 9 but also the support plate 2 are disassembled together with the disassembly of the outer case 11 as described above. However, a circuit board 4 on which a large number of electric circuit element groups are mounted is supported on the support plate 2, and therefore, the electric circuit element groups on the support plate 2 are exposed by disassembly. However, this electric circuit element group has a live part, which is dangerous, and may cause damage or failure due to contact with other objects. Needs attention. Therefore, disassembly of the outer case is left to an expert, and disassembly on the user side may be prohibited. As described above, in the conventional plasma display device, cleaning of the image surface of the PDP 1 and cleaning and replacement of the optical filter are not easy, and in some cases, there is a problem that a specialist must be left.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to allow a user to safely and easily disassemble and reassemble an outer case at any time, and to clean an optical filter. It is an object of the present invention to obtain a plasma display device in which replacement, replacement, and cleaning of a PDP image surface can be easily performed.

A second object of the present invention is to provide a plasma display device capable of effectively guiding the heat of a PDP to a rear outer case.

A third object of the present invention is to provide a plasma display device in which an optical filter can be easily attached and detached when an outer case is disassembled.

[0012]

In the plasma display device according to the present invention, mounting legs are planted on a support plate for supporting a PDP and a circuit board, and free ends of the mounting legs are provided in a space provided on the circuit board. Let it protrude through
A rear outer case is attached to the free end of the mounting leg, and the outer case is divided into a rear outer case for accommodating the PDP and the second half of the circuit board and a front outer case for covering the first half. Is to be housed in the rear exterior case so that it is not exposed, so that only the front exterior case can be removed, and the electric circuit element group is not exposed in the remaining PDP and the united part of the circuit board and the rear exterior case. Therefore, the front outer case can be safely and easily removed on the user side, and the cleaning of the PDP image surface and the cleaning and replacement of the optical filter to be attached to the window of the front outer case can be easily performed. It is.

Further, the PDP is supported on the support plate by a double-sided adhesive tape having good heat conductivity.

Further, the optical filter is attached to the window of the front exterior case using a double-sided adhesive tape.

[0015]

Embodiment 1 FIG. 1 is an exploded cross-sectional view showing an exploded cross section of a plasma display device according to Embodiment 1 of the present invention, and FIG.
2 is a plan view of the circuit board in FIG. Figure 1,
In FIG. 2, 1 is a PDP having an image surface 1a, 2 is a support plate for supporting this PDP on one surface with a double-sided adhesive tape 3 having good thermal conductivity, and 4 is the other surface of the support plate 2 Is a circuit board supported at an interval 5 and is not shown in the figure.
Many electric circuit element groups for controlling and driving the DP are mounted. Note that the circuit board 4 in the present invention is divided into a plurality of parts (the drawing shows a case where the circuit board is divided into four pieces as an example, but the present invention is not limited to this). Is formed. Reference numeral 6 denotes a nut fixed to the support plate 2 and also serving as a spacer for securing the space 5, and the circuit board 4 is securely attached to the support plate 2 by bolts 7.

Reference numeral 11 denotes an outer case for accommodating the PDP 1 and the circuit board 4, and comprises a rear outer case 11a for accommodating the rear half, and a front outer case 11b for covering the front half fitted to the outer case. Reference numeral 12 denotes a window provided at a position corresponding to the image surface 1a of the PDP 1 on the front exterior case 11b. In the present invention, as shown in FIG. Attached. 13 is the front exterior case 11
a nut 13a provided on the front outer case 11b, and a stud bolt 13c one end of which is screwed into the nut via a spring washer 13b. A screw 13d screwed into the other end of the stud bolt 13c in a state where the front outer case 11b and the rear outer case 11a are fitted, and the two outer cases 11a and 11b are integrally formed by the coupling means 13. Assembled to form the outer case 11.

In the conventional apparatus as shown in FIG. 5, at this time, the support frame 9 for supporting the optical filter 8 and the support plate 2 for supporting the PDP 1 and the circuit board 4 are connected by the connecting means 13.
In the embodiment of the present invention, the optical filter 8 is directly attached to the front outer case 11b as described above, and the support plate 2 is fixed to the rear outer case 11a as described later. It is to be attached directly to

Numeral 14 denotes mounting legs implanted on the support plate 2, and as shown in the figure, its free ends protrude through the space 4a formed between the divided circuit boards. . Reference numeral 14a denotes a nut provided at a free end of the mounting leg 14, and the support plate 2 is directly mounted on the rear exterior case 11a by screwing a bolt 15 through a mounting hole 11a1 provided in the rear exterior case 11a.

According to the present invention, the PDP 1 and the circuit board 4
And the rear outer case 11a are integrated with each other, and the coupling means 13 connects only the rear outer case 11a and the front outer case 11b. 4 is not exposed, thus cleaning and replacing the optical filter,
The image surface can be cleaned safely and easily.

Further, the optical filter 8 is connected to the front exterior case 1.
Because it was decided to attach directly to the inner surface of the window 12 of 1b,
There is no need for the support frame 9 as in the conventional device.

As described above, according to the present invention, the mounting legs 14 are planted on the support plate 2 and the rear outer case 11a is fixed to the free ends of the mounting legs. P, which becomes a passage and is supported by the support plate 2
The secondary effect that the heat generated in DP1 can be effectively guided to the rear outer case 11a can be expected. The fact that the PDP 1 is supported on the support plate 2 by the double-sided adhesive tape 3 having good thermal conductivity as described above is a means for promoting this effect. In order to further exert this effect, the mounting legs 14 are required. It is conceivable to make itself, for example, of aluminum having good thermal conductivity.

In the embodiment shown in FIG. 1, a nut 13a is attached to the inner surface of the front outer case 11b.
Although the nut 13a is screwed to the stud bolt 13c from the side of the rear exterior case 11a using the screw 13d, the nut 13a is provided on the inner surface of the rear exterior case 11a, and the stud screwed to the nut 13a. The bolt 13c may be screwed from the side of the front exterior case 11b using a screw 13d. With this configuration, the front exterior case 11b can be removed from the front side of the apparatus, and the disassembly and reassembly of the front exterior case 11b on the user side can be further facilitated.

In the embodiment shown in FIG. 1, an example is shown in which the front outer case 11b and the rear outer case 11a are partially overlapped with each other at the fitting portion. Rear exterior case 11
a may be formed so as to form a substantially U-shaped concave portion at a portion where the rear outer case 11a is fitted into the substantially U-shaped concave portion.
The two cases 11a and 11b may be fitted to each other through a buffer material made of an elastic material such as rubber or sponge between the two cases b. With this configuration, although the description is omitted in the above description, for example, the air cooling ability of the fan provided on the side surface of the rear outer case 11a is not reduced, and the dust from the fitted portion is not reduced. Intrusion can be prevented. Of course, a substantially U-shaped recess may be provided on the side of the rear outer case 11a.

Embodiment 2 FIG. 3 is a plan view of a circuit board used in a plasma display device according to Embodiment 2 of the present invention, and the same or corresponding parts as those in FIG. 2 are denoted by the same reference numerals. . In the second embodiment, the circuit board 4 is divided into 1
A space 4a for receiving the mounting leg 14 is formed at a predetermined location, and the same effect as in the first embodiment can be obtained.

[0025]

Since the present invention is configured as described above in detail, the following effects can be obtained.

According to the first invention, mounting legs are planted on the support plate supporting the PDP and the circuit board, and a rear outer case is mounted on a free end of the mounting legs, and the outer case is connected to the PDP and the circuit board. It is divided into a rear exterior case that accommodates the rear half and a front exterior case that covers the front half, and the electric circuit element group on the circuit board is not exposed even at the time of division, so it is safe and easy on the user side The front exterior case can be removed, and the PDP image surface can be easily cleaned. In addition, since the optical filter is directly detachably attached to the inner surface of the window of the front exterior case, cleaning and replacement of the optical filter can be similarly easily and easily performed.

According to the second aspect of the present invention, the PDP is supported on the support plate by the double-sided adhesive tape having good thermal conductivity. Therefore, the PDP is passed through the mounting legs implanted on the support plate.
Can be effectively conducted to the rear exterior case, and a plasma display device with excellent cooling performance can be obtained.

According to the third aspect of the present invention, since the optical filter is attached to the window of the front exterior case using the double-sided adhesive tape, the optical filter can be attached and detached without any tools. It works.

[Brief description of the drawings]

FIG. 1 is an exploded cross-sectional view showing an exploded cross section of a plasma display device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the circuit board in FIG.

FIG. 3 is a plan view of a circuit board used in a plasma display device according to a second embodiment of the present invention.

FIG. 4 is a front view showing a conventional plasma display device.

FIG. 5 is an exploded cross-sectional view showing an exploded cross-section taken along line AA of FIG. 4;

[Description of Signs] 1 Plasma display panel, 1a Image surface, 2
Support plate, 3 double-sided adhesive tape, 4 circuit board, 4a space, 5 intervals, 8 optical filter, 10 double-sided adhesive tape, 11 outer case, 11a rear outer case, 11
b front exterior case, 12 windows, 13 coupling means, 14
Mounting legs.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4E360 AA02 AB05 AB13 BA03 BC05 BD03 CA02 EA05 EA14 EA18 EA24 ED02 ED17 ED28 GA24 GA47 GA49 GA53 GB02 5C058 AA11 AB01 AB05 AB06 BA30 BA35 5C080 AA05 BB05 DD30 JJ06 5G04 EE05 EE08 EE13 EE36 FF00 GG11 KK05

Claims (3)

[Claims] 1. A plasma display panel having an image surface, a support plate supporting the plasma display panel on one surface, and a control plate for controlling and driving the plasma display panel supported on the other surface of the support plate at an interval. A circuit board on which the electric circuit element group is mounted, a mounting leg that is planted on the support plate, and whose free end protrudes through a space provided on the circuit board, is fixed to the free end of the mounting leg, An outer case, comprising: a rear outer case that houses the rear half of the plasma display panel and the circuit board; and a front outer case that fits with the rear outer case and covers the front half of the plasma display panel and the circuit board. Coupling means for detachably coupling a case and a rear outer case, and the plasma display of the front outer case A plasma display device comprising: a window provided at a position corresponding to an image surface of a panel; and an optical filter removably attached to an inner surface of the window. 2. The plasma display device according to claim 1, wherein the plasma display panel is supported on a support plate by a double-sided adhesive tape having good thermal conductivity. 3. The plasma display device according to claim 1, wherein the optical filter is attached to an inner surface of the window with a double-sided adhesive tape.