JP2008304506A - Plasma display unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display unit capable of exhibiting ample heat radiation, and equipped with a lightweight chassis member, in the plasma display unit that is enlarged, year after year. <P>SOLUTION: This plasma display unit is provided with a panel 10, arranged opposed with a pair of substrates having at least a transparent front face side to form a discharge space between the substrates, and having a plurality of discharge cells, and the chassis member 14 for holding the panel 10, and chassis member 14 is constituted of a metal member of porous structure. According to this constitution, a light-weight chassis with the ample heat radiation is obtained and the plasma display unit is reduced in weight. A transportation cost of a chassis single body is reduced by reducing weight of the chassis, and working efficiency is markedly improved also in the manufacturing process. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a plasma display device known as a thin, lightweight display device having a large screen.

  In recent years, plasma display devices have attracted attention as display panels (thin display devices) with excellent visibility, and higher definition and larger screens are being promoted.

In such a plasma display device, a chassis member is provided for holding a panel for displaying a screen and installing a drive circuit for operating the panel. Conventionally, this chassis member is generally used by reinforcing a single aluminum plate having a thickness of about 2 to 3 mm with a reinforcing material from the viewpoint of heat generation and weight reduction. In addition, there is a chassis member that has a configuration in which a pipe having a hollow portion is connected to cause heat dissipation of the chassis member using a wind passage and does not cause deformation (Patent Document 1).
JP-A-11-233967

  In such a plasma display device, it is difficult to reduce the weight necessary for realizing a simple wall-mounted television with a conventional chassis member in which a single aluminum plate is reinforced with a reinforcing material for each size that increases year by year.

  It is an object of the present invention to provide a plasma display device having a chassis member that exhibits sufficient heat dissipation and is lightweight.

  In order to achieve the above object, a plasma display device according to the present invention includes a panel having a plurality of discharge cells and a pair of substrates that are transparent at least on the front side so that a discharge space is formed between the substrates. And a chassis member configured to hold a metal member having a porous structure.

  With this configuration, a chassis having a light weight and sufficient heat dissipation can be obtained, and the plasma display device can be reduced in weight. Moreover, the weight reduction of the chassis can reduce the transportation cost of the chassis alone and can greatly improve the work efficiency in the manufacturing process.

  Hereinafter, a plasma display device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3, but the embodiment of the present invention is not limited thereto.

  FIG. 1 shows a structure of a panel in the plasma display device. As shown in FIG. 1, on a transparent front substrate 1 such as a glass substrate, a plurality of rows of stripe-shaped display electrodes 2 which are paired with a scan electrode and a sustain electrode are formed, and covers the electrode group. Thus, the dielectric layer 3 is formed, and the protective film 4 is formed on the dielectric layer 3.

  A plurality of rows of stripes covered with an overcoat layer 6 are formed on the rear substrate 5 opposite to the front substrate 1 so as to intersect the display electrodes 2 of the scan electrodes and the sustain electrodes. The data electrode 7 is formed. On the overcoat layer 6 between the data electrodes 7, a plurality of barrier ribs 8 are arranged in parallel with the data electrodes 7, and a phosphor layer 9 is provided on the side surface between the barrier ribs 8 and on the surface of the overcoat layer 6. Yes.

  The substrate 1 and the substrate 5 are opposed to each other with a minute discharge space so that the display electrode 2 and the data electrode 7 of the scan electrode and the sustain electrode are almost orthogonal to each other, and the periphery is sealed, In the discharge space, one or a mixed gas of helium, neon, argon, and xenon is sealed as a discharge gas. In addition, the discharge space is divided into a plurality of sections by partition walls 8 to provide a plurality of discharge cells where the intersections of the display electrodes 2 and the data electrodes 7 are located, and each of the discharge cells has red, green and blue colors. The phosphor layers 9 are sequentially arranged one by one so that

  In the plasma display panel having such an electrode configuration, an address pulse is applied between the data electrode and the scan electrode by applying a write pulse between the data electrode and the scan electrode, and after selecting the discharge cell, the scan electrode By applying a periodic sustain pulse that is alternately inverted between the sustain electrode and the sustain electrode, a sustain discharge is performed between the scan electrode and the sustain electrode to perform a predetermined display.

  FIG. 2 shows an example of the overall configuration of a plasma display device incorporating the panel having the structure described above. In the figure, a housing for housing the panel 10 is composed of a front frame 11 and a metal back cover 12, and an opening of the front frame 11 is made of a glass or the like that also serves as an optical filter and panel 10 protection. A cover 13 is arranged. The front cover 13 is subjected to, for example, insertion of a copper mesh and silver deposition in order to suppress unnecessary radiation of electromagnetic waves. Further, the back cover 12 is provided with a plurality of ventilation holes 12a for releasing heat generated in the panel 10 and the like to the outside.

  The panel 10 is held by adhering to the front surface of the chassis member 14 as a holding plate that also serves as a heat sink made of aluminum or the like via a heat conductive adhesive, and on the rear surface side of the chassis member 14 is a panel. A plurality of circuit blocks 15 for driving the display 10 are attached. The heat conductive adhesive is for efficiently transferring the heat generated in the panel 10 to the chassis member 14 to dissipate heat. Further, the circuit block 15 includes an electric circuit for performing display driving of the panel 10 and controlling the panel 10, and extends beyond the four side edges of the chassis member 14 to the electrode lead-out part drawn to the edge part of the panel 10. They are electrically connected by a plurality of extending flexible wiring boards (not shown). Further, a boss portion 14 a for attaching the circuit block 15 or fixing the back cover 12 is provided on the rear surface of the chassis member 14 so as to project. Reference numeral 14b denotes a reinforcing material for preventing the chassis member from being twisted.

  FIG. 3 is a sectional view of a metal member constituting the chassis member 14 according to the present invention. As is apparent from FIG. 3, the chassis member 14 is made of a sound absorbing material material having a porous structure, and the material has a large number of hollow portions 14c scattered therein. Become. Therefore, if the chassis member 14 having the same structure is made of a sound absorbing material made of aluminum having a porous structure, the weight can be reduced as compared with an aluminum single plate. By reducing the weight of the chassis member 14, the transportation cost of the chassis itself can be reduced and the work efficiency in the manufacturing process can be dramatically improved, which is suitable for global mass production. And the plasma display apparatus reduced in weight can be obtained by incorporating the chassis member of this invention in a set.

  On the other hand, the heat dissipation required for the chassis member 14 must not be impaired. Since the chassis member 14 of the present invention is made of an aluminum sound absorbing material, it can sufficiently dissipate heat generated from the panel when an image is displayed on the PDP. According to the experiments by the present inventors, when the chassis member 14 of the present invention having a thickness of 2 mm was affixed to the panel 10 and confirmed with an actual machine, a temperature comparison was performed in a state where the temperature was sufficiently saturated on a practical screen. In the case, the result was almost the same as the conventional one. The thickness of the chassis member 14 can be appropriately set by designing the strength and heat capacity according to each size. Further, the reinforcing member 14b which is a part of the chassis member 14 can be further reduced in weight if it is made of a lightweight aluminum sound-absorbing material having a porous structure like the chassis member 14.

  Further, in the plasma display which is increased in size, the circuit block 15 and the cooling fan 18 themselves are also increased in size, so noise becomes a problem. Since the chassis member 14 of the present invention is made of a sound absorbing material, it is possible to reduce noise from general noise around 500 to 4000 Hz to high frequency sound of 8000 Hz or more. Unlike sound insulation, the sound-absorbing material converts vibration energy into frictional heat to reduce the energy, so it is effective even if it is placed nearby. In other words, by designing appropriately at the design stage, for example, when image information is displayed on the PDP, it is possible to provide sufficient silence with respect to noise generated from the PDP, the drive circuit block 15, the fan 18, and the like. .

  By providing the chassis member as described above on the back surface of the panel, it is possible to obtain a chassis having sufficient heat dissipation while reducing the weight of the plasma display device. The chassis member 14 of the present invention can be reduced by about 30% if the thickness is approximately the same as a conventional aluminum single plate having a thickness of about 2 to 3 mm reinforced with an aluminum reinforcing material. . In addition, although it is made lighter, it is made of aluminum, so that the same heat dissipation characteristics as before can be obtained.

  As is clear from the above description, according to the plasma display device of the present invention, a chassis having a light weight and sufficient heat dissipation can be obtained, and the weight reduction required for a simple wall-mounted television can be achieved. .

The perspective view which shows the panel structure of the plasma display apparatus by one embodiment of this invention Exploded perspective view showing internal configuration of plasma display device Sectional drawing of the metal member which comprises the chassis member of the plasma display apparatus

Explanation of symbols

10 Panel 14 Chassis member 14c Hollow part

Claims (1)

A panel having a plurality of discharge cells disposed opposite to each other so that a discharge space is formed between the substrates, and a chassis member holding the panel; and the chassis member is porous. A plasma display device characterized by comprising a metal member having a quality structure.

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