KR100612276B1 - Plasma display device - Google Patents

Abstract

The present invention provides a plasma display device for improving heat dissipation, noise, and EMI quality of a PDP and a driving circuit board.

The plasma display device of the present invention comprises a plasma display panel; A frame to which the plasma display panel is attached and supported; And a boss plate fastened to the rear of the frame to mount the driving circuit boards, wherein the boss plate fixes and supports the driving circuit boards on opposite sides of the plasma display panel.

Plasma Display, PDP, Boss Plate, Frame, Drive Circuit Board

Description

Plasma Display Device {PLASMA DISPLAY DEVICE}

1 is an exploded perspective view schematically showing a plasma display device according to the present invention.

2 is a rear view of the frame.

3 is a rear view of the boss plate.

4 is an exploded perspective view schematically illustrating a coupling relationship between a boss plate and a driving circuit board in FIG. 1.

5 is a perspective view of another embodiment of a boss plate.

6 is a longitudinal cross-sectional view taken along the line A-A of the plasma display device of FIG.

The present invention relates to a plasma display device, and more particularly, to a plasma display device for forming a heat dissipation structure of a plasma display panel (PDP), a heat conductive member, an air layer, and a driving circuit board. will be.

As is known, a plasma display device is mounted on a PDP for generating a plasma by gas discharge and displaying an image on the PDP, a chassis base for supporting the PDP, and a PDP opposite to the PDP of the chassis base. And a driving circuit board connected to the discharge sustaining electrode and the address electrode located inside the PDP through a flexible printed circuit) and a connector.

In large terms, since the PDP is composed of two glass substrates, the mechanical rigidity is weak. For this reason, the chassis base made of metal with larger mechanical rigidity than glass is used so that PDP may maintain mechanically stable rigidity.

In addition to maintaining the stiffness of the PDP as described above, the chassis base is referred to as a support function of the driving circuit board, a heat sink function of the PDP, and electromagnetic interference (EMI). ) It is in charge of grounding function.

A PDP is attached to the front of the chassis base and a driving circuit board is mounted to the rear of the chassis base so that the chassis base achieves the above functions.

Since this PDP is made of glass, it is difficult to process the screw holes in the PDP for screwing the chassis base and the double-sided tape is used to attach the PDP to the front of the chassis base. A boss is formed on the rear surface of the chassis base, and the driving circuit board is screwed to the boss.

As described above, US Pat. No. 5,971,566 may be used as a technique for attaching the PDP to the front surface of the chassis base. The technique uses a heat conducting member between the PDP and the chassis base, and heat from the PDP is transferred through the heat conductive member. It is configured to transmit to the chassis base and radiate heat from the chassis base. That is, this technique forms a heat dissipation structure leading to the PDP, the heat conducting member, and the chassis base.

The present invention was devised to improve the heat dissipation structure as described above, and an object thereof is to provide a plasma display device for improving heat dissipation, noise, and EMI quality of a PDP and a driving circuit board.

The present invention also provides a plasma display device which prevents mechanical interference between a driving circuit board and a set circuit board, thereby increasing the design freedom of the set maker.

In order to achieve the above object, the plasma display device according to the present invention,

A plasma display panel;

A frame to which the plasma display panel is attached and supported; And

A boss plate fastened to the rear of the frame to which driving circuit boards are mounted,

The boss plate fixes and supports the driving circuit boards on opposite sides of the plasma display panel.

The boss plate is made of a conductive material that is lighter than the frame.

The boss plate may be formed of any one of a conductive synthetic resin and a metal thin plate.

The boss plate is provided with a plurality of bosses for mounting a driving circuit board, and has a plate shape or a plate shape.

The boss plate has manipulation holes for manipulating the variable elements provided in the driving circuit board.

The driving circuit board includes elements in a direction toward the plasma display panel.

The distance between the devices and the plasma display panel is 5-20 mm.

The driving circuit board includes variable elements in a direction toward the boss plate.

An air layer for convection and radiation is formed between the driving circuit board and the plasma display panel.

The frame is formed of a metal material that maintains the rigidity of the plasma display panel and supports the weight of the entire apparatus.

The frame is formed of a rectangular frame attached to at least an outer portion of the plasma display panel.

The frame has a longitudinal member that is installed longitudinally within the rectangular frame.

The frame has a plurality of bar-shaped members are integrally connected.

The frame has wall-mounted bosses.

A thermally conductive member is formed on the rear surface of the plasma display panel.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view schematically showing a plasma display device according to the present invention.

Referring to the plasma display device with reference to the drawings, the plasma display device includes a PDP 11 for displaying an image by using gas discharge and heat generated on the back surface of the PDP 11 to generate heat. A heat conduction member 13 for radiating heat, a frame 15 attached to and supporting the PDP 11, and fastened to the rear of the frame 15 to mount the driving circuit boards 17 and the set circuit boards 19. It consists of the structure containing the boss plate 21 which supports.

Since the PDP 11 is configured to display an image using gas discharge, the present invention relates to the coupling relationship between the PDP 11 and other components, and thus, the specific volume of the PDP 11 will be described. Omit the description.

The heat conductive member 13 is provided on the rear surface of the PDP 11 by dissipating heat generated by the PDP 11 causing gas discharge. The thermally conductive member 13 may be formed and attached to a heat radiation sheet as shown in FIG. 1. The sheet-shaped thermally conductive member 13 may be made of various materials, and may be selectively applied among an acrylic heat dissipating material, a graphite heat dissipating material, a metal heat dissipating material, and a carbon nanotube heat dissipating material. It is important that the heat conducting member 13 smoothly conducts heat conduction in the planar direction in the PDP 11. If such a function is possible, the heat conducting member 13 may be formed of two or more materials in one PDP 11.

In addition, the heat conducting member 13 may be a solid heat dissipating material for forming a heat dissipation sheet as described above, but may also be applied to the heat dissipating material that is hardened into a solid state as time passes in a liquid phase. The heat radiation material cured from the liquid phase to the solid phase has the advantages of handling the liquid phase, that is, the thermal conductive member 13 is formed on the PDP 11 by the coating process, and thus, the process of installing a separate thermal conductive member 13 is unnecessary. .

2 is a rear view of the frame.

Referring to the frame 15, the frame 15 is attached to the rear surface of the PDP 11 to support the weight of the entire apparatus including the PDP 11 while maintaining the rigidity of the PDP 11. It is formed of a material that can be formed in addition to the structure that may reduce the weight of the entire device. The frame 15 may be attached to the heat conducting member 13 as shown in the drawing, or may be directly attached to the rear surface of the PDP 11 (not shown).

The frame 15 is formed of a metal material having a rigidity greater than that of the PDP 11 made of glass to maintain the rigidity of the PDP 11, and is formed of a rectangular frame supporting only the outer portion of the rear surface of the PDP 11. The weight is reduced. The frame 15 of the rectangular frame has a minimum portion necessary to support the PDP 11 within a range that does not cause structural defects in a structure capable of attaching the PDP 11 and supporting the weight of the entire apparatus. This is an example of the shape with all other parts removed. In other words, the frame 15 is formed by integrally connecting a plurality of bar-shaped members. Therefore, the frame 15 can be deformed into various shapes that can reduce the weight of the entire apparatus as compared with the related art while attaching and supporting the PDP 11. That is, one or more corner portions of the frame 15 may be formed in a plate shape. Substantially shown in FIG. 2 is a frame 15 further comprising a longitudinal member 15a (in the drawing). The wall-hung boss 23 is formed in this longitudinal member 15a. The wall boss 23 has rigidity that can transfer the weight of the entire apparatus delivered through the frame 15 to the wall or the like on which the apparatus is installed.

3 is a rear view of the boss plate, and FIG. 4 is an exploded perspective view schematically illustrating a coupling relationship between the boss plate and the driving circuit board in FIG. 1.

Referring to the drawings, the components related to the boss plate 21 will be described. The boss plate 21 is provided with a fastening hole 21a to directly fasten to the fastening hole 15b of the frame 15. The screw 25 forms a fastening structure. The fastening hole 21a and the fastening hole 15b are provided in plurality at positions corresponding to the boss plate 21 and the frame 15. This fastening structure stabilizes the fastening structure of the boss plate 21 and the frame 15, thereby increasing the reliability of the fastening.

On the other hand, as the frame 15 supports the PDP 11 and supports the weight of the entire apparatus including the PDP 11, the boss plate 21 is not required to have a special rigidity, but the drive rotation is mounted thereon. It is necessary to have a rigidity enough to support only the substrate 17 and the set circuit boards 19. Therefore, the boss plate 21 is preferably formed of a lighter material than the frame 15, and is preferably formed of a conductive synthetic resin or a metal thin plate for EMI grounding. Since the boss plate 21 is made of a material that is lighter than the frame 15, the weight of the entire plasma display device is significantly reduced while supporting the driving circuit boards 17 and the set circuit boards 19.

In addition, the boss plate 21 may be configured in a plate shape having a plurality of bosses 27 for mounting the driving circuit boards 17, or may be configured in a shape in which the plate shape is bent as shown in FIG. 5. . In addition, the boss plate 21 may be formed on a lattice connecting a plurality of bar members or may be variously modified in order to reduce the weight of the entire apparatus.

The boss plate 21 has an operation hole 31 for operating the variable element 29 provided in the driving circuit board 17 when the boss plate 21 is formed by bending a plate or a plate, unlike when formed in a lattice form. do. In other words, the operation hole 31 is preferably formed at a position corresponding to the variable element 29. The variable element 29 is an element that tunes the state of the PDP 11 after electrically connecting the driving circuit board 17 and the PDP 11, but may be various elements.

The driving circuit boards 17 include a plurality of elements 33 and include various substrates required for driving the PDP 11, such as a substrate driving the electrodes of the PDP 11 and a switching mode power supply (SMPS). It is defined by the meaning and produced by the PDP module maker. In particular, the drive circuit boards 17 are mounted to the boss 27 provided in the boss plate 21 with screws 35 so that these elements 33 face the opposite side of the PDP 11. On the opposite side of the drive circuit board 17 of the boss plate 21, the above-described set circuit board 19 is mounted with a screw 37. The set circuit board 19 is defined by a meaning including a video board for applying a video signal to the completed PDP 11 and a power board for controlling and supplying power. Thus, by mounting the driving circuit board 17 and the set circuit board 19 on both sides of the boss plate 21, it is possible to effectively prevent mechanical interference between the two, thereby improving the design freedom of the set maker.

Therefore, under the mass production system, the set maker manufactures various set circuit boards 19, mounts them on the boss plate 21, and supplies them in this state. The PDP 11 module maker supplies the driving circuit board 17 to the boss plate 21. ) Will be manufactured and mounted. Therefore, by assembling the boss plate 21 to the frame 15, the work maneuver is greatly reduced.

On the other hand, the buffer board (not shown) is arranged in a known manner so as to be responsible for the interface between the panel 11 and the driving circuit boards 17. In other words, in the production line, the boss plate 21 is assembled while connecting the necessary lines to the buffer board.

6 is a longitudinal cross-sectional view taken along the line A-A of the plasma display device of FIG.

Referring to these drawings, the tip of the elements 33 provided on the driving circuit board 17 mounted on the boss plate 21 and the back surface of the PDP 11 or the heat conductive member 13 provided thereon are 5 to 20 mm. It is preferable to maintain the interval P of the degree. When the gap P is less than 5 mm, air flow between the heat conductive member 13 and the elements 33 of the driving circuit board 17 becomes difficult, and when the gap P exceeds 20 mm, the air flows. Due to the weakening of the flow, the convection phenomenon is insufficient, thereby reducing the heat dissipation effect.

The air passage by the air layer AL is formed between the driving circuit board 17 and the PDP 11 by the gap P. The air layer AL smoothly flows the air between the boss plate 21 and the driving circuit board 11 and the PDP 11 against them, causing a natural convection phenomenon in addition to the radiation phenomenon. Maximizing the heat radiation efficiency of the 11 and the driving circuit board 17.

That is, the heat conducting member 13 is positioned on the PDP 11 side of the air layer AL, and the driving circuit boards 17 are positioned on the opposite boss plate 21. Therefore, convection and radiation phenomena are generated by the air layer P, whereby the PDP 11 and the driving circuit board 17 are effectively radiated.

In addition, since the elements 33 of the driving circuit board 17 protrude from the air layer AL, noise and EMI generated from the driving circuit board 17 are shielded by the driving circuit board 17. This improves the noise and EMI quality throughout the PDP device.

On the other hand, as shown in Figure 5, when the plate-shaped boss plate 21 is bent, it is easier to mount the set circuit board 19 produced by the set maker, and further eliminates mechanical interference between the two PDP devices can be made even thinner.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

 As described above, according to the plasma display device according to the present invention, the frame and the boss plate are dualized, the driving circuit boards are mounted on the boss plate opposite the PDP, the elements of the driving circuit board are directed to the PDP, and the PDP and the driving circuit. By forming an air layer between the substrates, there is an effect of improving heat radiation, noise, and EMI quality of the PDP and the driving circuit board.

Further, according to the present invention, the drive circuit board is provided on the PDP counter side of the boss plate, and the set circuit board of the set maker is provided on the opposite side of the drive circuit board, thereby preventing mechanical interference between the drive circuit board and the set circuit board. In addition, there is an effect of increasing the design freedom of the set maker.

Claims (13)

A plasma display panel; A frame on which the plasma display panel is attached and supported on one surface; And It includes a boss plate is fastened at intervals on the opposite side of the frame to which the driving circuit boards are mounted, And the boss plate fixes and supports the driving circuit boards on opposite sides of the plasma display panel. The method of claim 1, And the boss plate is formed of a conductive material which is lighter than a frame. The method of claim 1, And the boss plate is formed of any one of a conductive synthetic resin and a metal thin plate. The method of claim 1, The boss plate is provided with a plurality of bosses for mounting the driving circuit board, the plasma display device having a plate or plate shape bent. The method of claim 1, And the boss plate has manipulation holes for manipulating the variable elements provided in the driving circuit board. The method of claim 1, The driving circuit board includes elements in a direction toward the plasma display panel. The method of claim 6, And a distance between the elements and the plasma display panel is 5-20 mm. The method of claim 1, The driving circuit board includes variable elements in a direction toward the boss plate. The method of claim 1, And a convection and radiation air layer formed between the driving circuit board and the plasma display panel. The method of claim 1, And the frame is formed of a metal material that maintains the rigidity of the plasma display panel and supports the weight of the entire apparatus. The method of claim 1, And the frame is formed of a rectangular frame attached to at least an outer portion of the plasma display panel. The method of claim 1, The frame is a plasma display device in which a plurality of bar-shaped members are connected integrally. The method of claim 1, And a heat conductive member formed on a rear surface of the plasma display panel.

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