KR20080052878A - Plasma display apparatus and method for producting process - Google Patents

Abstract

A plasma display device and a manufacturing method thereof are provided to simplify a manufacturing process of the plasma display device by forming a clinching protrusion on a heat radiating plate by using a malleability of the heat radiating plate. A plasma display device includes a panel, a heat radiating plate(110), and an implementation member. The heat radiating plate is installed on the panel. Clinching protrusions are arranged on the heat radiating plate on the opposite side with respect to the panel. A clinching hole is arranged on the implementation member, such that the clinching protrusion is inserted into the clinching hole. The clinching protrusion penetrates the clinching hole. An end of the clinching protrusion is pressed against the implementation member, such that the heat radiating plate and the implementation member are fixed on the frame.

Description

Plasma display apparatus and manufacturing process according thereto

1 is a partially cutaway perspective view showing a plasma display device according to the present invention;

2 is an exploded perspective view showing a plasma display panel according to the present invention;

3 is a plan view showing an embodiment of an electrode arrangement of a plasma display panel;

4 is a timing diagram illustrating a method of time-division driving by dividing one frame into a plurality of subfields;

5 is a timing diagram illustrating waveforms of driving signals for driving a plasma display panel for the divided subfields;

FIG. 6 is a plan view illustrating a rear surface of the plasma display device shown in FIG. 1;

7 is a plan view showing a fixed state of the horizontal supporter and the heat sink shown in Figure 6,

8 is a flowchart illustrating a clinching processing method of a heat sink and a horizontal supporter according to the present invention;

9 is a flow chart showing a clinching processing method according to a second embodiment of the present invention,

10 is a flowchart showing a clinching processing method according to a third embodiment of the present invention,

11 is a flowchart illustrating a clinching processing method according to a fourth embodiment of the present invention.

12 is a flowchart illustrating a clinching processing method according to a fifth embodiment of the present invention.

The present invention relates to a plasma display device and a method for manufacturing the same, and more particularly, to a plasma display device and a manufacturing method for fixing the heat sink and the installation member through a clinching process.

Recently, various flat panel displays manufactured by reducing the weight and volume, which are disadvantages of cathode ray tubes, have been developed. Examples of the flat panel display include a liquid crystal display (LCD) and a field emission display ( Field Emission Display (FED), Plasma Display Panel (hereinafter referred to as "PDP device") and Electro-Luminescence (EL) display.

Among them, PDP is a flat panel display device that displays images using plasma discharge. The PDP is used for high resolution televisions, monitors, and indoor / outdoor advertising displays because it has a fast response speed and is suitable for displaying large area images.

However, the conventional plasma display apparatus includes a heat sink installed on the rear surface of the panel, and when the bracket is installed on the heat sink, the heat sink and the bracket are coupled through the TOX coupling, which makes the process complicated and expensive. There is a problem with using the tool.

An object of the present invention is to provide a plasma display device and a method of manufacturing the same, which easily fix the heat sink and the installation member through a clinching process.

In another aspect, the present invention is to provide a processing method that can be more easily fixed to the heat sink and the installation member without a separate fastening member.

A plasma display device according to the present invention includes a panel; A heat dissipation plate disposed on the panel and having a clinching protrusion disposed on an opposite side of the panel; It may include an installation member having a clinching hole is disposed so that the clinching protrusion is inserted.

The clinching protrusion may be disposed through the clinching hole, and the end of the clinching protrusion may be pressed onto the mounting member to fix the heat sink and the mounting member.

In addition, the clinching protrusion may be formed by drawing the heat sink, and the clinching protrusion may have a hollow formed inside or a groove formed inside.

The heat sink may further include a clinching hole for forming the clinching hole, and the clinching hole may protrude toward the opposite side of the panel.

The installation member may include at least one of a horizontal supporter, a vertical frame, a lug, a driving board, or a heat sink.

Hereinafter, a plasma display panel of the present invention will be described with reference to the accompanying drawings.

1 is a partially cutaway perspective view showing a plasma display device according to the present invention, Figure 2 is an exploded perspective view showing a plasma display panel according to the present invention.

As shown in FIG. 1 or 2, the plasma display apparatus according to the present invention includes a panel 100 including upper and lower substrates 10 and 20, and a heat sink 110 installed on a rear surface of the panel 100. ), A driving board (not shown) for driving the panel 100, and a cabinet surrounding the panel 100, the heat sink 110, and the driving board to expose the front surface of the panel 100. do.

The plasma display panel 100 includes a scan electrode 11, a sustain electrode 12, a sustain electrode pair 12, and an address electrode 22 formed on the lower substrate 20, which are pairs of sustain electrodes formed on the upper substrate 10. .

The sustain electrode pairs 11 and 12 generally include transparent electrodes 11a and 12a and bus electrodes 11b and 12b formed of indium tin oxide (ITO), and the bus electrodes 11b and 12b. 12b) may be formed of a metal such as silver (Ag) or chromium (Cr) or a stack of chromium / copper / chromium (Cr / Cu / Cr) or a stack of chromium / aluminum / chromium (Cr / Al / Cr). . The bus electrodes 11b and 12b are formed on the transparent electrodes 11a and 12a to serve to reduce voltage drop caused by the transparent electrodes 11a and 12a having high resistance.

Meanwhile, according to the exemplary embodiment of the present invention, the sustain electrode pairs 11 and 12 may not only have a structure in which the transparent electrodes 11a 12a and the bus electrodes 11b and 12b are stacked, but also the buses without the transparent electrodes 11a and 12a. Only the electrodes 11b and 12b may be configured. This structure does not use the transparent electrodes (11a, 12a), there is an advantage that can lower the cost of manufacturing the panel. The bus electrodes 11b and 12b used in this structure may be various materials such as photosensitive silver in addition to the materials listed above.

Light between the scan electrodes 11 and the sustain electrodes 12 between the transparent electrodes 11a and 12a and the bus electrodes 11b and 11c to absorb external light generated outside the upper substrate 10 to reduce reflection. A black matrix (BM, 15) is arranged that functions to block and to improve the purity and contrast of the upper substrate 10.

The black matrix 15 according to the exemplary embodiment of the present invention is formed on the upper substrate 10. The first black matrix 15 and the transparent electrodes 11a and 12a are formed at positions overlapping the partitions 25. ) And second black matrices 11c and 12c formed between the bus electrodes 11b and 12b. Here, the first black matrix 15 and the second black matrices 11c and 12c, also referred to as black layers or black electrode layers, may be simultaneously formed and physically connected in the formation process, or may not be simultaneously formed and thus not physically connected. .

In addition, when physically connected and formed, the first black matrix 15 and the second black matrix 11c and 12c may be formed of the same material, but may be formed of different materials when they are formed separately.

The upper dielectric layer 13 and the passivation layer 14 are stacked on the upper substrate 10 having the scan electrode 11 and the sustain electrode 12 side by side. Charged particles generated by the discharge are accumulated in the upper dielectric layer 13, and the protective electrode pairs 11 and 12 may be protected. The protective film 14 protects the upper dielectric layer 13 from sputtering of charged particles generated during gas discharge, and increases emission efficiency of secondary electrons. In addition, magnesium oxide (MgO) may be generally used for the protective film 14, and Si-MgO to which silicon (Si) is added may be used. Here, the content of silicon (Si) added to the protective film 14 may be 50PPM to 200PPM based on the weight percent (wt%).

On the other hand, the address electrode 22 is formed in the direction crossing the scan electrode 11 and the sustain electrode 12. In addition, a lower dielectric layer 23 and a partition wall 25 are formed on the lower substrate 20 on which the address electrode 22 is formed.

In addition, a phosphor layer is formed on the surfaces of the lower dielectric layer 23 and the partition wall 25. The partition wall 25 has a vertical partition wall 21a and a horizontal partition wall 21b formed in a closed shape to physically distinguish the discharge cells, and prevent ultraviolet rays and visible light generated by the discharge from leaking to the adjacent discharge cells.

In an embodiment of the present invention, not only the structure of the partition wall 25 illustrated in FIG. 2, but also the structure of the partition wall 25 having various shapes may be possible. For example, a channel type having a channel that can be used as an exhaust passage in at least one of a differential partition structure, a vertical partition 21a, or a horizontal partition 21b having different heights of the vertical partition 21a and the horizontal partition 21b. The barrier rib structure having a groove formed in at least one of the barrier rib structure, the vertical barrier rib 21a or the horizontal barrier rib 21b may be possible.

Here, in the case of the differential partition wall structure, the height of the horizontal partition wall 21b is more preferable, and in the case of the channel partition wall structure or the groove partition wall structure, it is preferable that a channel is formed or the groove is formed in the horizontal partition wall 21b. something to do.

Meanwhile, in one embodiment of the present invention, although the R, G and B discharge cells are shown and described as being arranged on the same line, it may be arranged in other shapes. For example, a Delta type arrangement in which R, G, and B discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may be not only rectangular, but also various polygonal shapes such as a pentagon and a hexagon.

In addition, the phosphor layer emits light by ultraviolet rays generated during gas discharge to generate visible light of any one of red (R), green (G), and blue (B). Here, an inert mixed gas such as He + Xe, Ne + Xe and He + Ne + Xe for discharging is injected into the discharge space provided between the upper / lower substrates 10 and 20 and the partition wall 25.

3 is a plan view illustrating an embodiment of an electrode arrangement of a plasma display panel.

As shown in FIG. 3, the plurality of discharge cells constituting the plasma display panel is preferably arranged in a matrix form. The plurality of discharge cells are formed at intersections of the scan electrode lines Y1 to Ym, the sustain electrode lines Z1 to Zm, and the address electrode lines X1 to Xn, respectively. The scan electrode lines Y1 to Ym may be driven sequentially or simultaneously, and the sustain electrode lines Z1 to Zm may be driven simultaneously. The address electrode lines X1 to Xn may be driven by being divided into odd-numbered lines and even-numbered lines, or sequentially driven.

Since the electrode arrangement shown in FIG. 3 is only an embodiment of the electrode arrangement of the plasma panel according to the present invention, the present invention is not limited to the electrode arrangement and driving method of the plasma display panel shown in FIG. 3. For example, a dual scan method in which two scan electrode lines among the scan electrode lines Y1 to Ym are simultaneously scanned is possible. In addition, the address electrode lines X1 to Xn may be driven by being divided up and down in the center portion of the panel.

4 is a timing diagram illustrating a method of time division driving by dividing one frame into a plurality of subfields.

One unit frame may be divided into a predetermined number, for example, eight subfields SF1, ..., SF8 to realize time division gray scale display. Each subfield SF1, ... SF8 is divided into a reset section (not shown), an address section A1, ..., A8 and a sustain section S1, ..., S8.

Here, according to an embodiment of the present invention, the reset period may be omitted in at least one of the plurality of subfields. For example, the reset period may exist only in the first subfield or may exist only in a subfield about halfway between the first subfield and all the subfields.

In each address section A1, ..., A8, a display data signal is applied to the address electrode X, and scan pulses corresponding to each scan electrode Y are sequentially applied.

In each of the sustain periods S1, ..., S8, a sustain pulse is alternately applied to the scan electrode Y and the sustain electrode Z to form wall charges in the address periods A1, ..., A8. Sustain discharge occurs in the discharge cells.

The luminance of the plasma display panel is proportional to the number of sustain discharge pulses in the sustain discharge periods S1, ..., S8 occupied in the unit frame. When one frame forming one image is represented by eight subfields and 256 gradations, each subfield in turn has different sustains at a ratio of 1, 2, 4, 8, 16, 32, 64, and 128. The number of pulses can be assigned. In order to obtain luminance of 133 gradations, cells may be sustained by addressing the cells during the subfield 1 section, the subfield 3 section, and the subfield 8 section.

The number of sustain discharges allocated to each subfield may be variably determined according to weights of the subfields according to the APC (Automatic Power Control) step. That is, in FIG. 4, a case in which one frame is divided into eight subfields has been described as an example. However, the present invention is not limited thereto, and the number of subfields forming one frame may be variously modified according to design specifications. Do. For example, a plasma display panel may be driven by dividing one frame into eight or more subfields, such as 12 or 16 subfields.

The number of sustain discharges allocated to each subfield can be variously modified in consideration of gamma characteristics and panel characteristics. For example, the gray level assigned to subfield 4 may be lowered from 8 to 6, and the gray level assigned to subfield 6 may be increased from 32 to 34.

FIG. 5 is a timing diagram illustrating waveforms of driving signals for driving a plasma display panel for the divided subfield.

The subfield is a wall formed by a pre-reset section and a pre-reset section for forming positive wall charges on the scan electrodes Y and negative wall charges on the sustain electrodes Z. A reset section for initializing the discharge cells of the entire screen using the charge distribution, an address section for selecting the discharge cells, and a sustain section for maintaining the discharge of the selected discharge cells.

The reset section includes a setup section and a setdown section. In the setup section, rising ramp waveforms (Ramp-up) are simultaneously applied to all scan electrodes to generate fine discharges in all discharge cells. Thus, wall charges are generated. In the set down period, a falling ramp waveform (Ramp-down) falling at a positive voltage lower than the peak voltage of the rising ramp waveform (Ramp-up) is simultaneously applied to all the scan electrodes (Y), thereby erasing and discharging the discharge cells. Is generated, thereby eliminating unnecessary charges during wall charges and space charges generated by the setup discharges.

In the address period, a negative scan signal scan is sequentially applied to the scan electrode, and at the same time, a positive data signal data is applied to the address electrode X. The address discharge is generated by the voltage difference between the scan signal and the data signal and the wall voltage generated during the reset period, thereby selecting the cell. Meanwhile, a signal for maintaining a sustain voltage is applied to the sustain electrode during the set down period and the address period.

In the sustain period, a sustain pulse is alternately applied to the scan electrode and the sustain electrode to generate sustain discharge in the form of surface discharge between the scan electrode and the sustain electrode.

The driving waveforms shown in FIG. 5 are first embodiments of signals for driving the plasma display panel according to the present invention, and the present invention is not limited by the waveforms shown in FIG. For example, the pre-reset period may be omitted, and the polarity and the voltage level of the driving signals illustrated in FIG. 5 may be changed as necessary. After the sustain discharge is completed, an erase signal for erasing wall charge may be applied to the sustain electrode. May be authorized. In addition, the single sustain driving may be performed by applying the sustain signal to only one of the scan electrode (Y) and the sustain (Z) electrode to generate a sustain discharge.

FIG. 6 is a plan view illustrating a rear surface of the plasma display device shown in FIG. 1.

As shown in FIG. 6, a heat sink 110 for dissipating heat generated from the panel 100 is disposed on a rear surface of the panel 100, and the heat sink 100 drives the panel 100. The driving board 40 is disposed.

The driving board 40 includes a data driver board 50 for applying current to an address electrode (not shown) of the panel 100 and a scan for applying current to a scan electrode (not shown) of the panel 100. A board 60, a sustain board 70 for applying current to a sustain electrode (not shown) of the panel 100, the data driver board 50, the scan board 60, and the sustain board 70 ) And a power supply unit 90 for supplying power to each of the boards 50, 60, 70, and 80.

The data driver board 50 selects only the discharge cells to be discharged among a plurality of discharge cells (not shown) formed on the panel 100 by applying a current to the address electrodes formed on the panel 100.

Here, one or both of the data driver boards 50 are installed above or below the panel 100 according to a single scan method or a dual scan method. In this embodiment, the panel 100 is a dual scan method. Both upper and lower sides of the 100 are provided.

In addition, the data driver board 50 is connected to the main controller 80 to apply a data signal to the address electrode.

Meanwhile, a plurality of horizontal supporters 120 are disposed in the left and right directions on the heat sink 110, and a vertical frame 130 connecting the horizontal supporters 120 in a vertical direction is disposed.

Here, the horizontal supporter 120 is fixed in four places in a row and a column on the rear surface of the heat sink 110, the vertical frame 130 is both ends of the horizontal supporter 120 disposed in the up / down direction Each is fixed.

Hereinafter, the fixing process of the horizontal supporter and the heat sink according to the embodiment of the present invention will be described in more detail with reference to FIG. 7.

7 is a plan view showing a fixed state of the horizontal supporter and the heat sink shown in Figure 6, Figure 8 is a flow chart illustrating a clinching processing method of the heat sink and the horizontal supporter according to the present invention.

First, a plurality of clinching holes 122 are formed in the horizontal supporter 120, and the clinching holes 122 may be variously implemented by those skilled in the art by blanking or various other processing methods, and the heat sink 110 In order to insert into the clinching hole 122, the clinching protrusion 112 is processed. (FIG. 8A, FIG. 8B)

In the present embodiment, the clinching protrusion 112 draws the heat sink 110 in a plate shape, but unlike the present embodiment, the clinching protrusion 112 may be used in various ways in the heat sink 110. Can be processed.

For example, the clinching protrusion may be molded by injection molding or die casting.

Next, the clinching protrusion 112 is inserted into the clinching hole 122 of the horizontal supporter 120 and penetrates the horizontal supporter 120, and the clinching protrusion is formed above the horizontal supporter 120. An upper end 112a of the 112 protrudes, and a groove 113 is formed inside the clinching protrusion 112. (FIG. 8C)

Next, the clinching protrusion 112 of the heat dissipation plate 110 protruding through the horizontal supporter 120 is pressed onto the upper surface of the horizontal supporter 120, and is pressed onto the compressed clinching protrusion 112. By this, the heat sink 110 and the horizontal supporter 120 are clinched. (FIG. 8D)

Here, since the upper end 112a of the clinching protrusion 112 is spread and wider than the clinching hole 122, the heat dissipating plate 110 and the horizontal supporter 120 are formed by the deformed clinching protrusion 112b. ) Is fixed.

Therefore, since the heat sink 110 and the horizontal supporter 120 according to the present embodiment process the heat sink 110 to fix the horizontal supporter 120, a separate member is not required and the processing step is greatly reduced. .

Meanwhile, in the present exemplary embodiment, the clinching hole 122 is formed in the horizontal supporter 120. However, the clinching hole is formed in the heat sink and the clinching protrusion is formed in the horizontal supporter. It may be.

9 is a flowchart illustrating a clinching processing method according to a second embodiment of the present invention.

In the second embodiment, the horizontal supporter 120 having the clinching hole 122 is formed in close contact with the heat sink 110, and the heat sink 110 corresponding to the clinching hole 122 is drawn to draw the clinching hole 122. Forming a clinching protrusion 112 penetrating through the chopper), and pressing the clinching protrusion 112 protruding toward the horizontal supporter 120 to connect the clinching protrusion 112 to the horizontal supporter 120. Clinching.

In the second embodiment, unlike the first embodiment, the clinching protrusion 112 processes the clinching protrusion 112 while the clinching protrusion 112 does not need to coincide with the positions of the clinching protrusion 112 and the clinching hole 122. Since it is fitted to the 122, there is an effect that the manufacturing process is more simplified.

Hereinafter, since the rest of the configuration according to the second embodiment is the same as the first embodiment, a detailed description thereof will be omitted.

10 is a flowchart illustrating a clinching processing method according to a third embodiment of the present invention.

The third embodiment draws together the clinching hole portion 124 and the clinching protrusion 112, which are edges of the clinching hole 122, during the machining of the clinching protrusion 112 in the second exemplary embodiment.

Thus, the clinching hole 124 is deformed in the processing step (FIG. 10B) of the clinching protrusion 112 to form a predetermined bent portion 124a upward, and clinching the crimping protrusion 112. In the step (FIG. 10c), the deformed upper end of the clinching protrusion 112 is formed to surround the bent portion 124a.

As such, when the heat sink 110 and the horizontal supporter 120 are clinched and operated, the coupling force between the clinching protrusion 112 and the horizontal supporter 120 is greatly improved, and the horizontal supporter 120 and the The play of the heat sink 110 is reduced.

In addition, since the horizontal supporter 120 is supported by the deformed clinching protrusion 112b in a state where the clearance between the heat sink 110 and the horizontal supporter 120 is reduced, the occurrence of vibration is minimized.

Hereinafter, since the remaining configuration according to the third embodiment is the same as the second embodiment, a detailed description thereof will be omitted.

11 is a flowchart illustrating a clinching processing method according to a fourth embodiment of the present invention.

The fourth embodiment is the same as the first embodiment except that in the first embodiment, a clinching protrusion 114 having a hollow inside is formed.

Thus, the heat sink 110 has a hollow 114b formed therein by a processing method such as punching or drawing in the step of forming the clinching protrusion 114 (FIG. 10B), and the upper end of the clinching protrusion 114. Press to form the end 114a of the clinching protrusion 114 to be rolled outward.

Hereinafter, since the remaining configuration according to the fourth embodiment is the same as the first embodiment, a detailed description thereof will be omitted.

12 is a flowchart illustrating a clinching processing method according to a fifth embodiment of the present invention.

In the fifth embodiment, the clinching protrusion 116 protrudes from one side of the heat sink 110, and the clinching protrusion 116 is formed integrally with the heat sink 110. same.

Thus, in the fifth embodiment, the clinching protrusion 116 is integrally formed in the manufacturing process of the heat dissipation plate 110 without any separate process of forming the clinching protrusion 116.

Afterwards, since the clinching processing method of the heat sink 110 and the horizontal supporter 120 is the same as in the first embodiment, a detailed description thereof will be omitted.

Meanwhile, a plurality of mounting members such as the horizontal supporter 120 or the vertical frame 130 are disposed on the heat sink 110, and the plurality of mounting members disposed on the heat sink 110 are formed by the clinching described above. It may be fixed to the heat sink (110).

For example, the lug 140, the driving board 40, or the heat sink 150 disposed on the edge of the heat sink 110 may also be coupled through the clinching process.

Thus, when the horizontal supporter 120, the vertical frame 130, the lug 140, the drive board 40 or the heat sink 150, etc. are combined through the clinching processing method as described above, Since the mounting member is fixed by use of an extensibility, there is an effect that it is not necessary to use a fastening member conventionally used.

On the other hand, although not shown, the horizontal supporter 120 and the vertical frame 130 may be fixed to the heat sink 110 at a time through the clinching method.

As described above, the plasma display panel device according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited to the embodiments and drawings described in the present specification, and is provided to those skilled in the art within the scope of the technical idea of the present invention. Application is possible.

Plasma display device and a manufacturing method according to the present invention has the effect of fixing the installation member disposed on the rear surface of the heat sink without a separate fastening member to the heat sink through a clinching process.

In addition, the plasma display device and the manufacturing method according to the present invention is such that the clinching protrusion formed on the heat sink is inserted into the installation member or after the heat sink and the mounting member are in close contact with each other so that the clinching protrusion passes through the clinching hole. Forming and pressing the clinching protrusion to fix the heat sink and the installation member has the effect of simplifying the manufacturing process.

In addition, since the plasma display device and the manufacturing method thereof according to the present invention are formed by the clinching projection of the heat sink through the malleable material of the heat sink, the effect of cost reduction according to the reduction of the number of parts and the yield according to the simplified processing process This has the effect of being improved.

In addition, in the plasma display device and the manufacturing method according to the present invention, since the heat sink material is drawn to form a clinching protrusion, and the clinching protrusion is pressed to fix the installation member, the heat sink and the installation member are in close contact with each other. The vibration or play is minimized.

Claims (7)

A panel; A heat dissipation plate disposed on the panel and having a clinching protrusion disposed on an opposite side of the panel; And an installation member in which a clinching hole is disposed to insert the clinching protrusion. The method according to claim 1, And the clinching protrusion is disposed through the clinching hole, and the end of the clinching protrusion is pressed onto the mounting member to fix the heat sink and the mounting member. The method according to claim 1, The clinching protrusion is formed by drawing the heat sink. The method according to claim 1, And the clinching protrusion has a hollow formed therein. The method according to claim 1, And the clinching protrusion has a groove formed therein. The method according to claim 1, And a clinching hole for forming the clinching hole in the heat sink, and the clinching hole protruding toward the opposite side of the panel. The method according to any one of claims 1 to 6, The installation member includes at least one of a horizontal supporter, a vertical frame, a lug, a driving board or a heat sink.

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