KR100683687B1 - Plasma display apparatus - Google Patents

Abstract

A plasma display device according to the present invention includes a plasma display panel; A heat conducting member disposed in parallel with the rear surface of the plasma display panel; The chassis base is disposed parallel to the rear surface of the heat conducting member, and has a surface reinforcement for pressing the heat conducting member to have a predetermined surface roughness on a surface facing the heat conducting member so that the heat conducting member can be fixed to the plasma display panel. Wow; And a circuit board disposed at the rear of the chassis base to drive the plasma display panel.

Description

Plasma display apparatus

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

FIG. 2 is a partial cross-sectional view taken along the line II-II of FIG. 1. FIG.

3 is a perspective view of the chassis base shown in FIG.

4 is a partial cross-sectional view showing a plasma display device according to another embodiment of the present invention.

5 is a perspective view of the chassis base shown in FIG.

<Brief description of the major symbols in the drawings>

110. Plasma display panel 140, 240 Chassis base

141,243. Tighten reinforcement 150. Circuit board

160..Heat conduction member 241.Protrusion

The present invention relates to a plasma display device, and more particularly, to a plasma display device having an improved structure so that heat generated from the plasma display panel can be smoothly discharged.

Plasma display device is a flat panel display that displays images by using gas discharge phenomenon. It is excellent in various display ability such as display capacity, brightness, contrast, afterimage and viewing angle, and it is possible to replace cathode ray tube with thin and large display. It is in the spotlight as the next generation flat panel display.

Typically, such a plasma display apparatus includes a plasma display panel, a chassis base disposed substantially parallel to the plasma display panel, a circuit board mounted behind the chassis base to drive the plasma display panel; And a case accommodating the plasma display panel, the chassis base, and the circuit board.

In the plasma display panel, an image is realized by a discharge phenomenon, and thus a large amount of heat is generated. Such heat degrades the display performance of the plasma display panel, and when driven for a long time, causes a problem of deteriorating the reliability of the circuit board. Therefore, in order to effectively dissipate heat generated from the plasma display panel, a heat conducting member is generally provided between the plasma display panel and the chassis base.

Such a thermally conductive member is attached to the plasma display panel by an acrylic adhesive. As such, the acrylic adhesive disposed between the plasma display panel and the thermally conductive member has a low thermal conductivity, and thus receives heat generated from the plasma display panel. The thermally conductive member diffused in the planar direction and released does not function properly. Accordingly, there may be a problem in which a phenomenon such as an afterimage or a luminance step due to uneven heat distribution occurs in the plasma display panel.

The present invention is to solve the above problems, by the adhesion reinforcing portion is formed on the surface facing the heat conducting member of the chassis base, the heat conducting member can be fixed to the plasma display panel in close contact without a separate adhesive, heat radiation by the heat conducting member It is an object of the present invention to provide a plasma display device which can be made smoothly.

Plasma display device according to the present invention for achieving the above object,

A plasma display panel;

A heat conductive member disposed in parallel with a rear surface of the plasma display panel;

An adhesion reinforcing part disposed parallel to the rear surface of the heat conductive member and having a predetermined surface roughness on a surface facing the heat conductive member so as to be tightly fixed to the plasma display panel to press the heat conductive member. A chassis base provided;

And a circuit board disposed behind the chassis base to drive the plasma display panel.

Here, the chassis base is further provided with at least one protrusion protruding toward the heat conducting member, the adhesion reinforcing portion is preferably provided at the end of the protrusion.

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

1 is an exploded perspective view of a plasma display device according to an exemplary embodiment of the present invention, and FIG. 2 is a partial cross-sectional view taken along the line II-II of FIG. 1.

Referring to FIG. 1, the plasma display apparatus 100 according to an exemplary embodiment includes a plasma display panel 110 in which an image is implemented.

The plasma display panel 110 may be any one of various plasma display panels. As an example, an AC plasma display panel having a surface discharge type structure as shown in FIG. 2 may be employed. have.

The plasma display panel 110 illustrated in FIG. 2 includes a front panel 120 and a rear panel 130 that is coupled to face the front panel 120.

The front panel 120 includes a front substrate 121 disposed in front, a storage electrode pair 122 formed on a rear surface of the front substrate 121, and a front dielectric layer formed to cover the storage electrode pair 122. 123 and a protective film 124 formed on the rear surface of the front dielectric layer 123. The sustain electrode pair 122 may be formed as a pair of X and Y electrodes spaced apart from each other by a discharge gap.

The rear panel 130 disposed at the rear of the front panel 120 is formed on the rear substrate 131 and the front surface of the rear substrate 131 and crosses the storage electrode pairs 122. Extended address electrodes 132, a back dielectric layer 133 formed to cover the address electrodes 132, and barrier ribs 134 formed on the back dielectric layer 133 to define discharge spaces 135. And a phosphor layer 136 disposed in the discharge spaces 135 and a discharge gas filled in the discharge spaces 135. The partition walls 134 extend in parallel with each other with at least one address electrode 132 interposed therebetween, so that the regions where the storage electrode pairs 122 and the address electrodes 132 intersect are respectively discharge spaces 135. It is formed to correspond to.

The chassis base 140 is disposed behind the plasma display panel 110 having the above configuration, and the circuit board 150 is disposed behind the chassis base 140. Devices for driving the plasma display panel 110 are mounted on the circuit board 150, and the devices are configured to supply power to the plasma display panel 110 and to implement an image on the plasma display panel 110. In order to do this, a device for applying a signal may be included.

The electrical signal from the circuit board 150 is transmitted to the plasma display panel 110 by the signal transmission member. The signal transmission member may be configured in various ways. For example, at least one device 153, for example, a TCP 151 formed by mounting a driver IC in a tape-shaped wiring unit 152 may be employed. Can be. The plasma display panel 110, the chassis base 140, the circuit board 150, and the like as described above are accommodated by a case provided with a front cover and a back cover, which are not shown, to constitute the plasma display apparatus 100. do.

Meanwhile, the plasma display panel 110 and the chassis base 140 are coupled to each other by an adhesive member 161 such as a double-sided tape. A heat conductive member 160 made of a material having excellent thermal conductivity such as graphite is disposed in the space between the chassis base 140 and the plasma display panel 110 where the adhesive member 161 is not disposed. The thermally conductive member 160 is formed in a plate shape as shown, and is disposed substantially parallel to the rear surface of the plasma display panel 110. As described above, the thermally conductive member 160 disposed on the rear surface of the plasma display panel 110 receives heat generated when the plasma display panel 110 is driven, and diffuses and dissipates it in the planar direction of the plasma display panel 110. .

The chassis base 140 is disposed behind the heat conductive member 160. The chassis base 140 is formed of a metal material such as aluminum to support the plasma display panel 110. The chassis base 140 may have a structure in which an edge of the chassis base 140 is bent backward, so that bending or bending deformation may be prevented, and a plurality of reinforcing members are disposed at the rear of the chassis base 140. 170 may be installed, but is not limited thereto.

Between the chassis base 140 and the heat conduction member 160 as described above is provided with the adhesion reinforcing portion 141 according to one feature of the present invention. When the plasma display panel 110 and the chassis base 140 are coupled by the adhesive member 161, the adhesion reinforcement unit 141 may have the thermal conductive member 160 connected to the plasma display panel 110 and the chassis base 140. It can be fixed and supported in close contact therebetween.

As shown in FIG. 3, the adhesion reinforcing portion 141 is formed to have a predetermined surface roughness on a plane facing the heat conductive member 160 of the chassis base 140. As described above, the adhesion reinforcing portion 141 having a predetermined surface roughness may be formed by any one method selected from sand blasting, pressing, rolling, or the like, or may be formed by spraying conductive particles. As shown in FIG. 3, the adhesion reinforcing portion 141 may be formed over an entire region overlapping with the heat conductive member 160 of the chassis base 140, but may be formed only in a partial region. However, when the adhesion reinforcing portion 141 is formed only in a portion of the chassis base 140 as described above, the thermal conductive member 160 may be sufficiently adhered between the plasma display panel 110 and the chassis base 140. Should be able. The surface roughness of the adhesion reinforcing portion 141 is expected to be sufficient if the value is approximately 0.5mm or less, but is not necessarily limited thereto.

As described above, the adhesion reinforcing portion 141 having a predetermined surface roughness is formed on the surface of the chassis base 140 facing the heat conductive member 160, whereby the thermally conductive member 160 is plasma by the adhesion reinforcing portion 141. The display panel 110 may be pressed to be in close contact with each other, such that the plasma display panel 110 and the heat conductive member 160 may be fixed and supported in a close contact with no adhesive. Accordingly, since the heat generated from the plasma display panel 110 can be directly transferred to the heat conducting member 160, the heat can be quickly and smoothly eliminated. Therefore, occurrence of a phenomenon such as an afterimage or a luminance step due to uneven heat distribution in the plasma display panel 110 may be prevented.

Meanwhile, as another embodiment of the present invention, the plasma display apparatus may have a structure as shown in FIGS. 4 and 5. The same reference numerals as in the above-described drawings represent the same members having the same function, and thus detailed description thereof will be omitted.

4 and 5, a thermal conductive member 160 is disposed on the rear surface of the plasma display panel 110, and at least one protrusion 241 is disposed between the thermal conductive member 160 and the chassis base 240. It is provided with.

As shown in the drawing, a plurality of protrusions 241 are provided and spaced apart from each other, and protrude at predetermined heights from the plane of the chassis base 240 toward the heat conductive member 160. The protrusion 241 may be formed integrally with the chassis base 240 by pressing, and may have a structure in which a groove 242 is formed on a rear surface corresponding to the protrusion 241 of the chassis base 240. Meanwhile, the present invention is not limited thereto, and the protrusion may be formed separately to be coupled to the chassis base.

The protruding end of the protrusion 241 is formed in a flat surface, and the close reinforcing part 243 is formed at the end of the protrusion 241 having the flat surface. The adhesion reinforcing portion 243 is formed to have a predetermined surface roughness. For this purpose, the adhesion reinforcing portion 243 may be formed by any one method selected from sand blasting, pressing, rolling, and the like as described above. Or may be formed by blowing conductive particles.

As described above, an adhesion reinforcement portion 243 having a predetermined surface roughness is formed at an end portion of the protrusion 241 protruding from the chassis base 240 toward the heat conductive member 160. The heat conductive member 160 may be pressed against the plasma display panel 110 to be in close contact with the plasma display panel 110. Accordingly, the plasma display panel 110 and the heat conductive member 160 may be fixedly supported in a state in which the plasma display panel 110 and the heat conductive member 160 are not in contact with each other. Therefore, since the heat generated from the plasma display panel 110 can be directly transferred to the heat conducting member 160, the heat can be quickly and smoothly resolved, such as an afterimage or luminance step due to uneven heat distribution. This can be prevented from occurring.

Meanwhile, the area of the chassis base 240 where the protrusions 241 are not formed forms a heat insulating space with the heat conductive member 160. The thermal insulation space is transferred from the chassis base 240 that receives heat generated from the circuit board 150 to the plasma display panel 110, or a heat conductive member that receives heat generated from the plasma display panel 110 ( It is possible to block the heat transfer from the 160 to the circuit board 150 via the chassis base 240. Accordingly, the influence of heat transfer between the plasma display panel 110 and the circuit board 150 may be minimized.

As described above, according to the present invention, an adhesion reinforcing portion is provided between the heat conducting member and the chassis base for dissipating heat generated from the plasma display panel, so that the heat conducting member can be fixed in a close contact between the plasma display panel and the chassis base. Will be. As a result, the ability of releasing heat generated from the plasma display panel of the heat conductive member can be improved, so that a phenomenon such as an afterimage or luminance step due to uneven heat distribution can be prevented from occurring in the plasma display panel.

In addition, by forming the protrusions provided with the adhesion reinforcing portion on the chassis base, an insulation space may be formed in an area between the chassis base and the heat conductive member on which the protrusions are not formed. Accordingly, the effect of heat transfer between the circuit board and the plasma display panel is minimized.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

Claims (9)

A plasma display panel; A heat conductive member disposed in parallel with a rear surface of the plasma display panel; An adhesion reinforcing part disposed in parallel with a rear surface of the heat conductive member and formed to have a predetermined surface roughness on a surface facing the heat conductive member so that the heat conductive member is tightly fixed to the plasma display panel and pressurizes the heat conductive member. A chassis base provided; And a circuit board disposed behind the chassis base to drive the plasma display panel. The method of claim 1, The adhesion reinforcing portion is formed by a method selected from sand blasting, pressing, rolling, or the like, or by spraying conductive particles, characterized in that the plasma display device. The method of claim 1, And the adhesion reinforcing portion is formed over the entire area overlapping the heat conductive member. The method of claim 1, And at least one protrusion protruding toward the heat conducting member on the chassis base, and the adhesion reinforcing portion provided at an end of the protrusion. The method of claim 4, wherein And the projection is integrally formed with the chassis base by press working. The method of claim 4, wherein And the protrusion is formed separately and coupled to the chassis base. The method of claim 4, wherein And an area other than an area in which the protrusions of the chassis base are disposed to form an insulation space with the heat conductive member. The method according to any one of claims 1 to 7, And the heat conductive member is formed of a graphite material. The method of claim 1, And the chassis base is formed of an aluminum material.

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