KR20090016971A - Plasma display device - Google Patents

Abstract

A plasma display device is provided to improve the durability for the external shock and noise by forming the EMI(Electro-Magnetic Interference) ground for electromagnetic wave induction and the bonding layer for supporting the filter in the panel side of the filter. The filter(310) is directly adhered to the first filter supporter(330) connected to the backcover(320). The bonding layer(350) can be formed between the filter and the first filter supporter. The EMI ground(360) for the electromagnetic wave induction is formed in the same direction as the formation surface of the bonding layer of the filter. The electromagnetic wave induced to the EMI ground is induced to the backcover through the second filter supporter(340). The black layer(370) is comprised of the black ceramic material. The first, second filter supporter, the bonding layer and EMI ground are formed in the location overlapped with the black layer.

Description

Plasma display device

The present invention relates to a plasma display device, and more particularly, to a method of manufacturing a plasma display device by forming a filter on the front surface of the plasma display panel.

In general, a plasma display panel generates a discharge by applying a predetermined voltage to electrodes provided in a discharge space, and plasma generated during gas discharge excites a phosphor, thereby displaying an image including a character or a graphic. It is advantageous in that it is easy to thin a plane, provides a wide viewing angle up and down, left and right, and realizes full color and high brightness.

In order to correct optical characteristics of the display image or shield electromagnetic waves or near infrared rays, a filter in which a plurality of functional layers are stacked is disposed in front of the plasma display panel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display device which is easy to install a filter, has a low noise, and has a strong structure against external impact.

According to an aspect of the present invention, there is provided a plasma display apparatus including a plasma display panel and a filter disposed on a front surface of the panel, and a filter supporter connected to a back cover to support the filter, and the filter. An adhesive layer formed; And an EMI ground part formed on one surface of the adhesive layer formed on both surfaces of the filter.

Another plasma display device according to the present invention for solving the above technical problem, the adhesive layer formed between the filter and the filter supporter connected to the back cover for supporting the filter; A black layer formed on the filter such that at least a portion of the panel overlaps the non-display area of the panel; And an EMI ground portion formed on one surface of the adhesive layer formed on both surfaces of the filter, wherein the width of the black layer is 4.5% to 10% of the long side length of the display area of the panel.

According to the plasma display device according to the present invention configured as described above, to remove the bezel protruding from the front of the plasma display device to support the filter, the adhesive layer and the electromagnetic wave for supporting the filter on the panel side of the filter By forming an EMI ground for induction, it is possible to improve the durability of the device against noise and external shocks, and to reduce the manufacturing cost and size of the device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 9. 1 illustrates a perspective view of an embodiment of a plasma display panel.

As shown in FIG. 1, the plasma display panel includes a scan electrode 11, a sustain electrode 12, a sustain electrode pair formed on the upper substrate 10, and an address electrode 22 formed on the lower substrate 20. It includes.

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 (Indi μm-Tin-Oxide; ITO), and the bus electrodes 11b. , 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). have. 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 materials in addition to the materials listed above.

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

The black matrix according to the exemplary embodiment of the present invention is formed on the upper substrate 10, and the first black matrix 15, the transparent electrodes 11a and 12a and the bus electrode are formed at positions overlapping the partition wall 21. The second black matrices 11c and 12c formed between the 11b and 12b may be formed. 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.

Since the bus electrodes 11b and 12b or the partition wall 21 have a dark color, the light blocking function absorbs external light generated from the outside and reduces reflection, such as the black matrix, thereby improving contrast. have. Alternatively, a specific member formed on the upper substrate 10, for example, the dielectric layer 13 and the specific member formed on the lower substrate 20, for example, the partition wall 21, have a complementary color relationship with each other, so that they overlap when viewed from the front of the panel. It can also function as the black matrix by making the portion appear closer to black.

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, the address electrode 22 is formed in a direction crossing the scan electrode 11 and the sustain electrode 12. In addition, a lower dielectric layer 24 and a partition wall 21 are formed on the lower substrate 20 on which the address electrode 22 is formed.

In addition, the phosphor layer 23 is formed on the surfaces of the lower dielectric layer 24 and the partition wall 21. The partition wall 21 has a vertical partition wall 21a and a horizontal partition wall 21b formed in a closed shape, and physically distinguishes the discharge cells, and prevents ultraviolet rays and visible light generated by the discharge from leaking into adjacent discharge cells. have.

Referring to FIG. 1, it is preferable that a filter 100 is formed on the front surface of the plasma display panel according to the present invention, and the filter 100 has an external light blocking sheet, an anti-reflection (AR) sheet, and a near infrared shield (NIR). Sheets, EMI (Electromagnetic Interference) shielding sheet, diffusion sheet, optical properties sheet and the like can be included.

When the distance between the filter 100 and the panel is 10 μm to 30 μm, light incident from the outside may be effectively blocked, and light emitted from the panel may be effectively emitted to the outside. In addition, in order to protect the panel from the pressure from the outside, the distance between the filter 100 and the panel can be 30㎛ to 120㎛, and between the filter 100 and the panel to prevent the impact The pressure-sensitive adhesive layer having the function of shock absorption can also be formed.

In an embodiment of the present invention, not only the structure of the partition wall 21 illustrated in FIG. 1, but also the structure of the partition wall 21 having various shapes may be possible. For example, a channel in which a channel usable as an exhaust passage is formed in at least one of the differential partition structure, the vertical partition 21a, or the horizontal partition 21b having different heights of the vertical partition 21a and the horizontal partition 21b. A grooved partition structure having a groove formed in at least one of the type partition wall structure, the vertical partition wall 21a, or the horizontal partition wall 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 23 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 21.

2 illustrates a schematic structure of a plasma display device in a perspective view, wherein the plasma display device includes a panel 200, a heat sink 210, a filter 220, a back cover 230, and a bezel 240. can do.

2, the heat sink 210 is installed on the back of the panel 200 to emit heat generated from the panel 200, the filter 220 is installed on the front of the panel 200 is electromagnetic interference (Electromagnetic Interference: hereinafter referred to as 'EMI' and prevents reflection of external light.

 The back cover 230 surrounds the rear surface of the panel 200, and the bezel 240 assembled with the back cover 230 protrudes in front of the device to surround a portion of the edge of the filter 220. Support.

3 is a cross-sectional view illustrating a structure of a plasma display device, and descriptions of the same elements as those described with reference to FIG. 2 among the members illustrated in FIG. 3 will be omitted.

Referring to FIG. 3, a printed circuit board (“PCB”) 270 for driving the panel 200 is installed on a rear surface of the heat sink 210, and the PCB 270 is a heat sink 210. Is fixed to.

A plurality of driving integrated circuits (“driver ICs”) for supplying driving signals to the panel 200 are connected to the PCB 270, and the PCB 270 and the panel 200 are flexible. It may be connected by a printed circuit (Flexible Printed Circuit: "FPC", 260).

As shown in FIG. 3, the back cover 230 is spaced apart by a predetermined distance and positioned behind the panel 200, and the bezel 240 and the filter supporter 250 connected to the back cover 230 are connected to the filter 220. ) Up and down. One side 250b of the filter supporter 250 is connected to the back cover 230, and the other side 250a supports the filter 220, and a filter between the other side 250a of the filter supporter 250 and the filter 220. An EMI ground portion 290 is formed to guide the electromagnetic wave shielded at 220 to the back cover 230 side.

More specifically, the edge of the filter 220 is formed with a copper foil (not shown) for inducing EMI, the EMI ground portion 290 is formed in contact with the copper foil (not shown). EMI induced through the copper foil (not shown) and the EMI ground unit 290 is guided to the back cover 230 through the filter supporter 250.

In addition, the panel 200 is supported by the filter supporter 250, and an adhesive layer 280 for supporting the panel 200 is formed between the panel 200 and the other side 250a of the filter supporter 250. .

4 to 6 are sectional views showing embodiments of the structure of the plasma display device according to the present invention. Among the members shown in FIGS. 4 to 6, the same elements as those described with reference to FIGS. 2 and 3 are described. The description will be omitted.

Referring to FIG. 4, the filter 310 is directly attached to and supported by the first filter supporter 330 connected to the back cover 320, and an adhesive layer between the filter 310 and the first filter supporter 330 is used therefor. 350 may be formed. In addition, the EMI ground portion 360 for electromagnetic wave induction is formed on the same surface on which the adhesive layer 350 of the filter 310 is formed. Electromagnetic waves induced by the EMI ground unit 360 may be induced to the back cover 320 through the second filter supporter 340.

For the structure of the plasma display device according to the present invention as described above, the size of the filter 310 is preferably larger than the size of the panel 300 as shown in FIG.

It is preferable that the black layer 370 is formed on one surface of the filter 310, for example, on the user side surface. The black layer 370 may be made of a black ceramic material and serves to block light. The components of the device and the display image formed at the position overlapping the black layer 370 are not displayed to the user.

Therefore, the black layer 370 may be formed to overlap the non-display area of the panel, that is, the area where the image is not displayed, and the first and second filter supporters 330 and 340, the adhesive layer 350, and the EMI ground part ( The 360 is preferably formed at a position overlapping with the black layer 370 so as to be covered by the black layer 370 when viewed from the user side.

Accordingly, the width of the black layer 370 of the plasma display device having the structure shown in FIG. 4 is preferably larger than the thickness of the black layer formed in the plasma display device having the structure shown in FIG. 3.

In FIG. 4, the adhesive layer 350 and the EMI ground portion 360 are formed on the panel side of the filter 310, whereas the adhesive layer 350 and the EMI ground portion 360 are formed on the user side of the filter 310. It may be formed.

Referring to FIG. 5, the weight of the filter 310 to fix the filter 310 to the first filter supporter 330 while canceling the force applied to the filter 310 at the position where the EMI ground portion 360 is formed. In consideration of the adhesive strength of the adhesive layer 350 is preferably 0.3 to 25 (N / 25mm).

In addition, in order to fix the filter 310 to the first filter supporter 330 using the adhesive layer 350 having the adhesive force as described above, the thickness t of the adhesive layer 350 is 25 μm or more, and the adhesive layer 350 It is preferable that the width w1 of) is 2 mm or more. However, when the thickness of the adhesive layer 350 is too large, the distance between the filter 310 and the panel 300 may increase, so that the brightness or the light characteristics of the display image may be lowered. Therefore, the thickness of the adhesive layer 350 may be 200 μm or less. It is preferable. In addition, when the width w1 of the adhesive layer 350 is too large, the sizes of the filter 310 and the black layer 370 may be unnecessarily large, and thus the width of the non-display area and the black layer 370 of the panel 300 may be increased. In consideration of the width, the width w1 of the adhesive layer 350 is preferably 25 mm or less. For the same reason as above, it is preferable that the width w2 of the EMI ground portion 360 also has a range of 2 to 25 mm.

According to another embodiment of the structure of the plasma display device according to the present invention, as shown in FIG. 6, one filter supporter 380 is connected to the back cover 320, and one filter supporter 380 is disposed on the filter supporter 380. Both the adhesive layer 390 and the EMI ground portion 395 may be formed on the substrate. That is, one filter supporter 380 may simultaneously support the filter 310 and the EMI induction function. Accordingly, the structure of the plasma display device can be simplified to facilitate the manufacturing process, and the manufacturing cost of the device can be reduced.

7 is a perspective view illustrating a schematic structure of a plasma display device according to the present invention. The device includes a filter 400, a heat sink 410, a black layer 440, and a filter 420 and a back cover. It may include a filter supporter 430 connected to.

As shown in FIG. 7, according to the structure of the plasma display device according to the exemplary embodiment of the present invention, only the filter 420 and the panel 420 having the black layer 440 formed by removing the bezel connected to the back cover are plasma. It may be disposed on the front of the display device and shown to the user.

8 schematically shows a front shape of a plasma display device according to the present invention.

Referring to FIG. 8, in order to cover and cover the filter supporter formed in the plasma display apparatus, the adhesive layer for supporting the filter, and the EMI ground portion overlapping with the black layer 510 as described above, the black layer The widths a and d of the 510 and 520 are 25 mm or more, and preferably 4.5% or more of the long side length b of the display area 500 of the panel. However, when the widths a and d of the black layers 510 and 520 become too large, the display area 500 of the panel may be covered by the black layers 510 and 520. In consideration of the ratio of the non-display area, the widths a and d of the black layers 510 and 520 are preferably 10% or less of the long side length b of the display area 500 of the panel.

Considering that the aspect ratio of the display area of the plasma display panel is about 16 to 9, the widths a and d of the black layers 510 and 520 are equal to 8 of the short side length d of the panel display area 500. % To 17.8%.

In the case of the plasma display panel having a size of 42 inches to 50 inches, the long side length b of the display area 500 of the panel may be about 920 mm to 1100 mm. Accordingly, the widths a of the black layers 510 and 520 may be reduced. d) may be between about 41 mm and 110 mm.

In addition, the width a of the black layer 510 in the vertical direction and the width c of the black layer 520 in the horizontal direction may be different from each other.

FIG. 9 is a cross-sectional view illustrating an embodiment of a structure of a filter disposed on a front surface of a plasma display panel. The filter includes an AR / NIR sheet 610, an optical characteristic sheet 620, and an EMI shield sheet 630. It may include.

Referring to FIG. 9, the AR / NIR sheet 610 is an AR (Anti-) having a function of reducing glare by preventing reflection of light incident from the outside on the front surface of the base sheet 612 made of a transparent plastic material. A reflection layer 611 is attached, and a rear infrared shielding sheet 613 for shielding near infrared rays emitted from the panel so that signals transmitted using infrared rays such as a remote controller can be normally transmitted can be attached. Can be.

The optical sheet 620 may improve color temperature, color purity, or luminance characteristics of light incident from the panel. The optical sheet 620 may include a dye or a pigment and an adhesive that absorb light of a specific wavelength band on the front or rear surface of the base sheet 622 made of a transparent plastic material. The optical characteristic layer 621 may be stacked.

The EMI shield sheet 630 has an EMI shield layer 631 attached to a front surface of the base sheet 632 made of a transparent plastic material to shield electromagnetic interference (EMI) from being emitted from the panel to the outside. . In this case, the EMI shielding layer 631 is typically formed of a mesh structure using a conductive material, and the ratio of the EMI shielding sheet 630 in which an image is not displayed in order to make the ground smooth. The conductive material is entirely coated on the effective display area.

In addition, the EMI shield sheet 630 may have a structure in which a plurality of conductive layers, for example, a plurality of metal layers and a transparent layer having conductivity are alternately stacked.

An adhesive layer 640 may be formed between the AR / NIR sheet 610, the optical characteristic sheet 620, and the EMI shielding sheet 630, and each of the sheets 610, 620, and 630 may be formed of a filter. Make sure that it is firmly attached to the front. In addition, the material of the base sheet included between each of the sheets 610, 620, and 630 is preferably made of the same material in consideration of the ease of making the filter.

Meanwhile, in FIG. 9, the AR / NIR sheet 610, the optical characteristic sheet 620, and the EMI shielding sheet 630 are stacked in this order. However, the stacking order of each sheet may be differently stacked by those skilled in the art. In addition, at least one of the illustrated sheets 610, 620, and 630 may be omitted, or another functional layer may be added.

At least one of the basesheets shown in FIG. 9 may be omitted, and any one of the basesheets may be made of hard glass, which is not made of plastic, to improve a function of protecting the panel. . The glass is preferably formed spaced apart from the panel at a predetermined interval.

In addition, the filter formed on the front surface of the plasma display panel may further include a diffusion sheet (not shown). The diffusion sheet (not shown) serves to diffuse the incident light so that the light maintains uniform brightness. Accordingly, the diffusion sheet (not shown) can spread the light emitted from the panel uniformly to widen the vertical viewing angle of the display screen, and conceal the pattern formed in the external light blocking sheet or the like. In addition, the diffusion sheet (not shown) can collect light in a direction corresponding to the vertical viewing angle, make the front luminance uniform, and improve the antistatic property.

As the diffusion sheet (not shown), a transmissive or reflective diffusion film or the like may be used. In general, the diffusion sheet may have a form in which small glass beads are mixed in a base sheet of a polymer material. In addition, high purity acrylic resin (PMMA) may be used as a base sheet of the diffusion sheet (not shown), and when the high purity acrylic resin (PMMA) is used, the sheet is thick but has good heat resistance and is used for a large display device having high heat generation. Can be.

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made to the branches. Accordingly, modifications to future embodiments of the present invention will not depart from the technology of the present invention.

1 is a perspective view illustrating an embodiment of a structure of a plasma display panel.

2 is a perspective view showing a schematic structure of a plasma display device.

3 is a cross-sectional view illustrating a structure of a plasma display device.

4 to 6 are cross-sectional views illustrating embodiments of a structure of a plasma display device according to the present invention.

7 is a perspective view showing a schematic structure of a plasma display device according to the present invention.

8 is a view schematically showing the front shape of the plasma display device according to the present invention.

9 is a cross-sectional view illustrating an embodiment of a structure of a filter disposed on a front surface of a plasma display panel.

Claims (13)

A plasma display device comprising a plasma display panel and a filter disposed on a front surface of the panel. An adhesive layer formed between the filter and a filter supporter connected to a back cover to support the filter; And And an EMI ground portion formed on one surface of the adhesive layer on both surfaces of the filter. The method of claim 1, Further comprising a black layer formed on the filter so that at least a portion overlaps the non-display area of the panel, The width of the black layer is a plasma display device, characterized in that 4.5% to 10% of the long side length of the display area of the panel. The method of claim 1, And the adhesive layer and the EMI ground portion are formed on one surface of both surfaces of the filter adjacent to the panel. The method of claim 1, The width of the adhesive layer is a plasma display device, characterized in that 2mm to 25mm. The method of claim 1, The thickness of the adhesive layer is a plasma display device, characterized in that 25 to 200㎛. The method of claim 1, The width of the EMI ground portion is a plasma display device, characterized in that 2mm to 25mm. The method of claim 1, The adhesive force of the adhesive layer is a plasma display device, characterized in that 0.3 (N / 25mm) to 20 (N / 25mm). The method of claim 1, Further comprising a black layer formed on the filter so that at least a portion overlaps the non-display area of the panel, And the adhesive layer is formed at a position overlapping the black layer. The method of claim 8, And the EMI ground portion is formed at a position overlapping the black layer. A plasma display device comprising a plasma display panel and a filter disposed on a front surface of the panel. An adhesive layer formed between the filter and a filter supporter connected to a back cover to support the filter; A black layer formed on the filter such that at least a portion of the panel overlaps the non-display area of the panel; And EMI ground portion formed on one surface of the adhesive layer is formed on both sides of the filter, The width of the black layer is a plasma display device, characterized in that 4.5% to 10% of the long side length of the display area of the panel. The method of claim 10, The width of the black layer is a plasma display device, characterized in that 8% to 17.8% of the short side length of the display area of the panel. The method of claim 10, And the width of the black layer is 25 mm or more. The method of claim 10, The width of the black layer is a plasma display device, characterized in that 41 to 110mm.

Images