KR20090016972A

KR20090016972A - Plasma display device

Info

Publication number: KR20090016972A
Application number: KR1020070081345A
Authority: KR
Inventors: 박유
Original assignee: 엘지전자 주식회사
Priority date: 2007-08-13
Filing date: 2007-08-13
Publication date: 2009-02-18

Abstract

The present invention relates to a plasma display device, comprising: a plasma display panel; And a bezel surrounding the outer portion of the panel, wherein a haze of a portion of the bezel adjacent to the panel is 5% or more.

According to the present invention, by preventing light from being reflected from a portion adjacent to the panel among the bezels exposed to the user side, interference generated in the display image can be reduced, thereby improving the image quality of the display image. .

Description

Plasma display device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display apparatus, and more particularly, to a method of manufacturing a bezel for supporting a plasma display panel and a filter.

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 capable of improving image quality of a display image by minimizing interference caused by reflection in a specific area of the display image.

Plasma display device according to the present invention for solving the above technical problem, the plasma display panel; And a bezel surrounding the outer portion of the panel, wherein a haze of a portion of the bezel adjacent to the panel is 5% or more.

According to the plasma display device according to the present invention configured as described above, by preventing light from being reflected from the portion adjacent to the panel of the bezel exposed to the user side, it is possible to reduce the interference generated in the display image, thereby This can improve the image quality of the display image.

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 impact An adhesive layer having a function of shock absorption may 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.

FIG. 3 is a cross-sectional view of the structure of the plasma display device, and description thereof will be omitted for the same elements as those described with reference to FIG. 2.

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. .

In the plasma display device having the structure as illustrated in FIGS. 2 and 3, an image displayed on the panel 220 may be reflected at a portion of the bezel 240 adjacent to the panel 220. For example, light according to an image displayed on the panel 220 may be reflected at the inclined portion 250 of the bezel 240 in contact with the panel 220, thereby allowing the user to see a virtual image.

Figure 4 shows an embodiment of the front shape of the plasma display device according to the present invention.

Referring to FIG. 4, a member for preventing reflection of light due to an image displayed in the display area 300 of the panel is formed in a partial region 320 of the bezel 310 adjacent to the display area 300 of the panel. It is preferable that it is done.

For example, irregularities as shown in FIG. 5 may be formed in an area 320 of the bezel 310 adjacent to the panel display area 300, and the irregularities may be formed in the partial area 320 of the bezel 310. It can be formed by machining the surface.

Referring to FIG. 5, light emitted from the panel may be diffused or diffusely reflected from the surface of the bezel 330 by irregularities formed on the surface of the bezel 330, so that light emitted from the panel may be emitted from the bezel 330. It can reduce the reflection.

In order to prevent the light according to the display image from being reflected from the bezel 310, the haze of the area 320 adjacent to the panel display area 300 of the bezel 310 is 5% or more, and the reflectance is 3 to 20. It is preferable that it is%. The region 320 adjacent to the panel display area 300 of the bezel 310 or the bezel 310 may be formed of a polymer or a metal material.

In addition, in order to effectively prevent the reflection of the panel light by the bezel 310 while maintaining the strength for supporting the panel and the filter, the region 320 having the haze of 5% or more to prevent the reflection is displayed on the panel display. The distance from the area 300 may be within 2 cm. That is, the widths d1 and d2 of the region 320 for preventing reflection may range from about 1 cm to 3 cm.

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

5 is a cross-sectional view showing an embodiment in the cross-sectional shape of the area adjacent to the panel of the bezel.

Claims

A plasma display panel; And

A bezel surrounding an outer portion of the panel,

And a haze of a portion of the bezel adjacent to the panel is 5% or more.

The method of claim 1,

And a reflectance of a portion of the bezel adjacent to the panel is 3% to 20%.

The method of claim 1,

And unevenness is formed on a surface of a portion of the bezel adjacent to the panel.

The method of claim 1,

And a portion of the bezel adjacent to the panel has a distance from the panel within 2 cm.