KR20060093861A - Plasma display apparatus - Google Patents

Abstract

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a plasma display device capable of suppressing erroneous discharge and improving productivity.

According to an exemplary embodiment of the present invention, a plasma display apparatus includes a plasma display panel formed of a front substrate and a rear substrate; a frame supporting the plasma display panel; And at least two thermally conductive sheets formed between the plasma display panel and the frame, wherein the thermally conductive sheets have a predetermined distance from each other. At this time, it is preferable that the predetermined intervals have an interval of 0.1 mm or more and 5 mm or less.

Description

Plasma Display Apparatus {Plasma Display Apparatus}

1 is a structure schematically showing the structure of a conventional plasma display device.

2 illustrates a conventional plasma display panel.

3 is a schematic view of a thermally conductive sheet of a conventional plasma display device.

4 is a schematic view of a thermally conductive sheet according to a first embodiment of the present invention.

5A and 5B illustrate a structure of a plasma display device according to a second embodiment of the present invention.

6 illustrates a modified structure of the plasma display device according to the second embodiment of the present invention.

7A and 7B are graphs for describing thermal characteristics of a plasma display panel according to a second exemplary embodiment of the present invention.

***** Explanation of symbols for main parts of drawing *****

410, 510, 620; Plasma display panels 411 and 511; Front board

412, 512; Back substrates 420 and 520; frame

430, 530, 610; Thermally conductive sheet 540; Air layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a plasma display device capable of suppressing erroneous discharge and improving productivity.

 In general, a plasma display panel is a partition wall formed between a front substrate and a rear substrate to form one unit cell, and each cell includes neon, helium, or a mixture of neon and helium. The main discharge gas such as Ne + He) and an inert gas containing a small amount of xenon are filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light structure.

1 is a structure schematically showing the structure of a conventional plasma display device.

As shown in FIG. 1, the plasma display device excites a phosphor by a case 110 including a front cabinet 111 and a back cover 112 that determine an appearance, and vacuum ultraviolet rays caused by gas discharge inside the case. In order to drive and control the plasma display panel 120 and the plasma display panel to implement an image, and are connected to the driving device 130 including a printed circuit board (PCB) and the driving device to emit heat generated when the plasma display device is driven. And a frame 140 for supporting the plasma display panel and a thermally conductive sheet 150 formed between the plasma display panel and the frame to conduct heat generated from the plasma display panel to the frame.

In addition, a finger spring gasket supporting a filter formed by a film attached to a transparent glass substrate at a predetermined interval in front of the plasma display panel and a filter spring gasket electrically connected to a metal back cover. And a module supporter 190 for supporting a plasma display device including a filter supporter 180 and a driving device. Herein, the structure of the plasma display panel will be described in more detail with reference to FIG. 2.

2 illustrates a conventional plasma display panel.

As shown in FIG. 2, a plasma display panel includes a front substrate on which a plurality of sustain electrode pairs formed by pairing a scan electrode 202 and a sustain electrode 203 are formed on a front glass 201, which is a display surface on which an image is displayed. A rear substrate 210 having a plurality of address electrodes 213 arranged so as to intersect the plurality of sustain electrode pairs on the back glass 211 forming the back surface 200 and the rear surface is coupled in parallel with a predetermined distance therebetween. .

The front substrate 200 is made of a scan electrode 202 and a sustain electrode 203, that is, a transparent electrode (a) made of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 202 and the sustain electrode 203 provided as the bus electrode b are paired and included. The scan electrode 202 and the sustain electrode 203 are covered by one or more upper dielectric layers 204 that limit the discharge current and insulate the electrode pairs, and to facilitate the discharge conditions on top of the upper dielectric layers 204. A protective layer 205 on which magnesium oxide (MgO) is deposited is formed.

The rear substrate 210 is arranged such that a plurality of discharge spaces, that is, barrier ribs 212 of a stripe type (or well type) for forming discharge cells are arranged in parallel. In addition, a plurality of address electrodes 213 that perform address discharge to generate vacuum ultraviolet rays are disposed in parallel with the partition wall 212. On the upper side of the rear substrate 210, R, G, and B phosphors 214 which emit visible light for displaying an image during address discharge are coated. A lower dielectric layer 215 is formed between the address electrode 213 and the phosphor 214 to protect the address electrode 213. The thermally conductive sheet formed on the rear surface of the plasma display panel and conducting heat generated from the plasma display panel has a structure as shown in FIG. 3.

3 is a schematic view of a thermally conductive sheet of a conventional plasma display device.

As shown in FIG. 3, the conventional thermally conductive sheet 310 is formed on the frame 320 and then adhered to the plasma display panel 330. The thermally conductive sheet 310 adheres the plasma display panel 330 formed of the frame 320, the front substrate 331, and the rear substrate 332, and heats generated when the plasma display panel 330 is driven. It is conducted in the direction of the frame 320. In addition, the frame 320 is adhered to the plasma display panel 330 by the thermally conductive sheet 310 to support the plasma display panel 330, and emits heat conducted through the thermally conductive sheet 310 to the outside. .

On the other hand, conventionally, since the thermally conductive sheet is formed as a single sheet, poor workability occurs. That is, when the thermally conductive sheet is partially formed incorrectly on the frame, there is a problem in that the manufacturing cost increases because the entire sheet needs to be replaced.

In addition, when adhering to the plasma display panel with a single thermally conductive sheet, air remains due to the large area of the thermally conductive sheet, thereby forming an air layer between the plasma display panel and the thermally conductive sheet.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display device which can improve workability by improving the structure of a plasma display device.

In addition, another object of the present invention is to provide a plasma display device which can reduce the manufacturing cost by improving the structure of the plasma display device.

Further, another object of the present invention is to provide a plasma display device capable of suppressing a temperature step of a plasma display panel.

In order to achieve the above object, the plasma display device of the present invention comprises a plasma display panel formed of a front substrate and a rear substrate; A frame supporting the plasma display panel; And at least two thermally conductive sheets formed between the plasma display panel and the frame, wherein the thermally conductive sheets have a predetermined distance from each other.

 The thermally conductive sheet of the present invention is formed on the edge of the plasma display panel at predetermined intervals.

The predetermined interval of the present invention is characterized by being 0.1 mm or more and 5 mm or less.

The thickness of the thermally conductive sheet of the present invention is characterized by being 0.1 mm or more and 2 mm or less.

The thermally conductive sheet of the present invention is characterized in that it is formed in either the transverse direction or the longitudinal direction.

The thermally conductive sheet of the present invention is characterized in that the thermally conductive tape or silicone.

According to a feature of the present invention, a thermally conductive sheet is formed between the plasma display panel and the frame, divided into at least two sheets, and formed to have a predetermined distance between the thermally conductive sheets. At this time, when the gap between the sheets is narrow, the air layer is generated widely, the defect rate increases, and when the gap between the sheets is wide, the predetermined interval is 0.1 mm or more and 5 mm or less in consideration of reducing the temperature uniformity of the plasma display panel. It is preferable to form.

Hereinafter, with reference to the accompanying drawings, a specific embodiment according to the present invention will be described.

<Example 1>

4 is a schematic view of a thermally conductive sheet according to a first embodiment of the present invention.

As shown in FIG. 4, the thermally conductive sheet 430 of the plasma display device according to the first embodiment of the present invention is formed on the frame 420 and then adhered to the rear surface of the plasma display panel 410.

The plasma display panel 410 is formed of the front substrate 411 and the rear substrate 412 so that an image is displayed when the plasma display device is driven.

The frame 420 supports the plasma display panel 410 and emits heat generated by the plasma display panel 410 to the outside.

The thermal conductive sheet 430 adheres the plasma display panel 410 and the frame 420, and conducts heat generated from the plasma display panel 410 in the direction of the frame 420 when driven.

The thermally conductive sheet 430 according to the first embodiment of the present invention is formed of at least two, wherein the thermally conductive sheet 430 has a predetermined distance from each other.

Thus, when the thermally conductive sheets are formed on the frame with a predetermined distance from each other, workability is improved. That is, when the thermally conductive sheet is divided into several sheets and formed on a frame having the same area, the thermally conductive sheet can be formed more easily than the conventional single sheet. In addition, the defective rate due to process tolerance can be reduced.

In addition, by forming a plurality of sheets at predetermined intervals, the formation of the air layer can be efficiently suppressed, thereby increasing the adhesive area of the thermally conductive sheet.

In addition, when the thermally conductive sheet is partially formed incorrectly, only the sheet corresponding to the portion can be removed and reworked, thereby reducing the manufacturing cost.

At this time, in the first embodiment of the present invention, when the thermally conductive sheet is formed, the thermal conductive sheet is formed to have a predetermined interval at the edge of the plasma display panel. By providing a predetermined interval at the upper, lower, left, and right edges of the plasma display panel, workability can be improved, the air layer can be suppressed, and manufacturing cost can be reduced.

The thickness of the thermally conductive sheet according to the first embodiment of the present invention is such that the thickness of the thermally conductive sheet is approximately 0.1 mm or more and 2 mm or less in order to sufficiently adhere the plasma display panel and the frame and to sufficiently conduct heat generated in the plasma display panel in the frame direction. .

In this case, the formation direction of the thermally conductive sheet is either the horizontal direction or the vertical direction of the plasma display panel.

In addition, the material of the thermally conductive sheet according to the first embodiment of the present invention is characterized in that the thermally conductive tape or silicon.

Further details of the spacing between the thermally conductive sheets according to the features of the present invention will be described later through the second embodiment.

<Example 2>

5A and 5B illustrate a structure of a plasma display device according to a second embodiment of the present invention. FIG. 5A schematically illustrates a thermally conductive sheet formed on a frame according to a second embodiment of the present invention, and FIG. 5B illustrates a thermally conductive sheet formed between a plasma display panel and a frame according to a second embodiment of the present invention. The side view shown.

5A and 5B, the thermally conductive sheet 530 of the plasma display device according to the second embodiment of the present invention is formed on the frame 520 and then adhered to the rear surface of the plasma display panel 510. .

The plasma display panel 510 is formed of the front substrate 511 and the rear substrate 512 to display an image when the plasma display device is driven.

The frame 520 supports the plasma display panel 510 and emits heat generated by the plasma display panel 510 to the outside.

The thermal conductive sheet 530 adheres the plasma display panel 510 and the frame 520, and conducts heat generated from the plasma display panel 510 in the direction of the frame 520 when driven.

The thermally conductive sheet 530 according to the second embodiment of the present invention is formed of at least two or more, wherein the thermally conductive sheet 530 has a spacing of 0.1 mm or more and 5 mm or less.

According to the second embodiment of the present invention, the improvement of workability, suppression of air layer formation, and reduction of manufacturing cost when at least two or more thermally conductive sheets are formed at intervals from each other have been described in the first embodiment of the present invention. It will be omitted.

In FIG. 5B, it can be seen that an air layer 540 is formed in the gap portion between the thermally conductive sheets 530. The air layer 540 has a low thermal conductivity compared to the thermal conductive sheet 530. Therefore, the plasma display panel in the spaced portion does not sufficiently conduct heat generated during long time driving in the frame direction, resulting in a temperature step. As a result, incorrect discharge of the plasma display panel is caused.

When the interval is narrow, the workability is poor, and when the adhesive is adhered to the plasma display panel, air discharge is difficult, and thus the incidence rate of the air layer is increased.

Accordingly, in the second embodiment of the present invention, the lower limit is 0.1 mm and the upper limit is 5 mm. 0.1 mm is the minimum interval considering process tolerances, and 5 mm is the maximum interval at which no discharge will occur due to the temperature step of the panel.

 At this time, in the second embodiment of the present invention, when the thermally conductive sheet is formed, it is formed to have an interval of 0.1 mm or more and 5 mm or less on the edge of the plasma display panel. By providing a predetermined interval at the upper, lower, left, and right edges of the plasma display panel, workability can be improved, the air layer can be suppressed, and manufacturing cost can be reduced.

When such gaps of the edges are 5 mm or less, erroneous discharge due to the temperature step of the edge portion of the plasma display panel can be suppressed. Although not shown in Figs. 5A and 5B, the distance between edges of the discharge region of the plasma display panel is preferably 5 mm or less.

In addition, in the second embodiment of the present invention, when the thickness of the thermally conductive sheet is 0.1 mm or more and 2 mm or less, and the interval between the thermally conductive sheets is 5 mm or less, erroneous discharge due to a temperature step does not occur.

In addition, the material of a thermally conductive sheet is irrelevant in numerically limiting the space | interval of 0.1 mm or more and 5 mm or less. That is, in the interval of 0.1 mm or more and 5 mm or less, erroneous discharge can be suppressed irrespective of the material of a thermally conductive sheet. Preferably the thermally conductive sheet is made of a thermally conductive tape or silicone.

6 illustrates a modified structure of the plasma display device according to the second embodiment of the present invention.

As shown in FIG. 6, in the second embodiment of the present invention, the thermal conductive sheet 610 may be formed in the vertical direction of the plasma display panel 620. That is, the thermally conductive sheet can be formed in either the horizontal or vertical direction, and when the interval between 0.1 mm and 5 mm is satisfied, the temperature of the plasma display panel can be uniform.

In addition, although two or three sheets are formed to form sheets in FIGS. 5A and 6, erroneous discharge due to temperature step can be suppressed at intervals of 5 mm or less even when using a larger number of sheets.

7A and 7B are graphs for describing thermal characteristics of a plasma display panel according to a second exemplary embodiment of the present invention. The x-axis of FIG. 7A represents each position in the horizontal direction of the plasma display panel, and the y-axis represents temperature according to each position of the plasma display panel. The x-axis of FIG. 7B represents each position in the longitudinal direction of the plasma display panel, and the y-axis represents temperature according to each position of the plasma display panel. Each of the curves shows the measured temperature values when the spacing of the thermally conductive sheets is 0.1 mm, 5 mm and 10 mm, respectively.

As shown in FIGS. 7A and 7B, it can be seen that as the gap between the thermally conductive sheets increases, the temperature of the plasma display panel in the gap portion increases. At this time, when the inter-sheet spacing is at most 5 mm or less, no discharging due to a temperature step occurs.

As described above, in the exemplary embodiment of the present invention, the thermally conductive sheet is formed between the plasma display panel and the frame, and divided into at least two sheets, and the thermally conductive sheet is formed to have a predetermined distance between the thermally conductive sheets. Thereby, the formation work of a thermally conductive sheet | seat is easy, an air layer can be suppressed, and manufacturing cost can be reduced.

At this time, when the gap between the sheets is narrow, the air layer is generated widely, the defect rate increases, and when the gap between the sheets is wide, the predetermined interval is 0.1 mm or more and 5 mm or less in consideration of reducing the temperature uniformity of the plasma display panel. It is preferable to form. In limiting the gap, the thickness of the thermally conductive sheet is preferably 0.1 mm or more and 2 mm or less, and the material and the forming direction of the thermally conductive sheet are irrelevant.

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

As described above, the present invention has an effect of improving workability by improving the structure of the plasma display device.

In addition, the present invention has the effect of reducing the manufacturing cost by improving the structure of the plasma display device.

In addition, the present invention has the effect of suppressing the temperature step of the plasma display panel.

Claims (6)

A plasma display panel formed of a front substrate and a rear substrate; A frame supporting the plasma display panel; And At least two thermally conductive sheets formed between the plasma display panel and the frame; And the thermally conductive sheets have a predetermined distance from each other. The method of claim 1, And the thermally conductive sheet is formed at edges of the plasma display panel at predetermined intervals. The method according to claim 1 or 2, And the predetermined interval is 0.1 mm or more and 5 mm or less. The method of claim 3, And the thickness of the thermally conductive sheet is 0.1 mm or more and 2 mm or less. The method of claim 1, And the thermally conductive sheet is formed in one of a horizontal direction and a vertical direction. The method of claim 1, And the thermally conductive sheet is a thermally conductive tape or silicon.

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