KR100776506B1 - Plasma display device with improved efficiency of radiating heat - Google Patents

Abstract

A plasma display device with improved heat radiation efficiency is provided to radiate the heat generated from a panel and decrease the noise by forming a heat radiating space between the panel and a filter. A plasma display device includes a plasma display panel(310) and a filter(340) provided on one side of the panel. A heat radiating space(330) is formed by a transparent spacer(320) interposed between the panel and the filter. The transparent spacer is made of acrylic material. At least one of an anti-reflective film, a metal layer, a metal oxide layer, and a meshed metal layer is formed on one side of the filter.

Description

Plasma display device with improved heat dissipation efficiency {PLASMA DISPLAY DEVICE WITH IMPROVED EFFICIENCY OF RADIATING HEAT}

1 is a cross-sectional view showing a plasma display device according to a first embodiment of the prior art.

2 is a cross-sectional view showing a plasma display device according to a second embodiment of the prior art.

3 is a plan view of a plasma display device according to a first embodiment of the present invention.

4 is a cross-sectional view according to Ι-II of FIG.

5 is a cross-sectional view of a plasma display device according to a second embodiment of the present invention.

6 is a cross-sectional view of a plasma display device according to a third embodiment of the present invention.

7 is a cross-sectional view of a plasma display device according to a fourth embodiment of the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

  310: Panel 320: Transparent spacer

  330: heat dissipation space 340: filter

The present invention relates to a plasma display device, and more particularly, to a plasma display device capable of dispersing heat and noise generated in a panel by forming a heat dissipation space between a panel and a filter.

In general, a plasma display panel device (PDP) is being spotlighted as a next-generation display device because it can satisfy both an increase in size and a decrease in thickness compared to a CRT (Cathode Ray Tube) representing a conventional display device. The PDP apparatus displays an image using a gas discharge phenomenon, and is excellent in various display capabilities such as display capacity, brightness, contrast, afterimage, viewing angle, and the like. In addition, PDP devices are easier to be enlarged than other display devices, and are considered to be most suitable as high-quality digital televisions in the future as thin-type light-emitting display devices.

The driving principle of the PDP apparatus is that discharge occurs in the gas between the electrodes by a direct current or an alternating voltage applied to the electrode, and the phosphor emits light by excitation of the phosphor by the radiation of ultraviolet rays.

However, the PDP device has a harmful effect on the human body due to electromagnetic waves and near-infrared rays due to its driving characteristics, and may cause malfunction of precision devices such as a wireless telephone or a remote controller. Accordingly, in order to suppress the emission of electromagnetic waves and near infrared rays emitted from the PDP device to a predetermined value or less, electromagnetic wave shielding, near infrared shielding, surface radiation prevention and color purity improvement in order to shield electromagnetic waves and near infrared rays while reducing reflected light and improving color purity. A PDP filter having such a function is adopted.

Hereinafter, a plasma display apparatus according to the prior art will be described.

1 is a cross-sectional view of a plasma display device according to a first embodiment of the prior art. Referring to FIG. 1, the plasma display apparatus 100 includes a panel 110 and a filter 130. Generally, the filter 130 is used as tempered glass. However, when the filter 130 is used as tempered glass, the contact surface between the panel 110 and the filter 130 is not completely in contact with each other, and a uniform void 120 of 2 to 3 mm is generated. Accordingly, light emitted from the panel 110 may be refracted or reflected in the double or triple by the air gap 120. In addition, since the filter 130 formed of tempered glass is designed to have a thickness of about 3 mm to withstand external impacts, the weight of the plasma display device becomes heavy. Furthermore, the structure of the tempered glass filter 130 is a complex film formed to perform a variety of functions, there is a problem that the manufacturing process is cumbersome and expensive manufacturing costs.

In order to solve the above problems, a method of forming a panel of a plasma display device with a direct film filter has been proposed.

2 is a cross-sectional view illustrating a plasma display device according to a second embodiment of the prior art. Referring to FIG. 2, the plasma display apparatus 200 includes a panel 210 and a filter 220. In this case, the filter 220 uses a direct-attached film form attached to the front surface of the panel 210 to remove the gap (gap) formed between the panel 210 and the filter 220. As such, by forming the filter 220 in the form of a direct adhesive film, voids between the panel 210 and the filter 220 are completely removed, thereby preventing distortion of light generated by the voids.

However, as the filter 220 is formed in the form of a direct adhesive film, heat and noise generated in the panel 210 are emitted to the front of the panel 210. Accordingly, a user using the plasma display apparatus 200 has a problem of directly exposing heat and noise generated from the panel 210.

Accordingly, the present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a plasma display device that can dissipate heat and noise generated in a panel by forming a heat dissipation space between the panel and the filter. do.

According to an aspect of the present invention, to achieve the above object, the plasma display device of the present invention includes a plasma display panel, a filter provided on one side of the panel, provided between the plasma display panel and the filter It includes a heat dissipation space formed by the transparent spacer.

Hereinafter, with reference to the drawings showing embodiments of the present invention, the present invention will be described in more detail.

3 is a plan view of a plasma display device according to a first embodiment of the present invention. 4 is a cross-sectional view taken along the line II-II of FIG. 3.

3 and 4, the plasma display device 300 according to the first embodiment of the present invention includes a plasma display panel 310 and a filter 340 provided at one side of the panel 310. And a heat dissipation space 330 formed by the transparent spacer 320 provided between the panel 310 and the filter 340.

The panel 310 includes a front substrate 301 and a back substrate 305. On the surface of the front substrate 301, a plurality of sustain electrodes 302 are arranged in a stripe shape. Bus electrodes 302 are formed on each sustain electrode 302 to reduce signal delay. A dielectric layer is formed on the entire surface of the front substrate 301 on which the organic electrode 302 is formed. A protective film 304 is formed on the dielectric layer.

A rear substrate provided with a plurality of address electrodes 306 is provided on a surface facing the front substrate 301. In addition, between the dielectric layer formed on the address electrode 306 and the protective film 304, a plurality of partition walls 307 are formed to protrude in parallel with the address electrode 306 toward the front substrate 301. That is, the partition wall 307 is disposed in one region between the neighboring address electrode 306 and the address electrode 306. At this time, red, green, and blue phosphor layers 309 are formed in each of the groove portions between the adjacent partition walls 307 and the partition walls 307.

In addition, a discharge gas 308 is sealed between the front substrate 301 and the rear substrate 305.

In the panel 310 having such a structure, when an electrical signal is applied to the sustain electrode 302 and the address electrode 306, a discharge cell for emitting light is selected, and the discharge gas 308 according to the discharge in the selected discharge cell. Ultraviolet rays emitted from the excitation emit light to the phosphor layer 309 as visible light. The visible light emitted as described above is emitted through the front substrate 301 to provide an image that can be recognized by the user.

The filter 340 is disposed on the front surface of the front substrate 301 to prevent interference due to external environmental light. Thereafter, an adhesive is applied to the outermost side of the front substrate 301 to bond the panel 310 to the filter 340. In this case, at least one transparent spacer 320 is formed in a region corresponding to the plurality of partitions 307 on the front surface of the front substrate 301 to space the panel 310 and the filter 340. The filter 340 has a simpler structure than that of commonly used tempered glass, and uses a direct-attach film that is easy to manufacture. The direct-attach film may be formed of polyester having a transmittance of visible light of 30 to 80%. This is because when the visible light transmittance of the filter 340 is 30% or less, the light emitted from the panel 310 is darkened by the filter 340 and the light efficiency is lowered. When the visible light transmittance of the filter 340 is 80% or more, the panel ( This is because all of the light emitted from 310 is transmitted through the filter 340, so that the image displayed on the display may appear too bright. In addition, the opacity (haze) of the filter 340 is preferably 1 to 3%. This is because when the opacity of the filter 340 is 3% or more, the image appears bluish, and when it is 1% or less, it is impossible in the process.

In addition, the transparent spacer 320 may be formed of one or more materials selected from the group consisting of acrylics. The transparent spacer 320 may be formed in a size corresponding to the partition wall 307, and the height of the transparent spacer 320 may be several to several tens of micrometers, most preferably 3.5 to 4.5 micrometers, and the width may be similar to the width of the partition wall 307. It may be formed to 30 to 50μm. For example, the transparent spacer 320 is formed of a spherical shape of a mixture of acrylate and resin (curing agent) to be uniformly coated on the front substrate 301, or the partition 307 and the photoresist using a photoresist. It may be formed by patterning the corresponding region.

As such, a plurality of transparent spacers 320 are provided between the panel 310 and the filter 340 to separate the panel 310 and the filter 340, thereby separating the panel 310 from the filter 340. To form a space. The heat dissipation space 330 distributes heat generated from the panel 310 to the entire area of the front substrate 301, thereby preventing a temperature rise phenomenon concentrated on only a predetermined area of the panel 310. As such, the heat dissipation space 330 may be formed between the panel 310 and the filter 340 to dissipate heat and noise generated from the panel 310 by using air convection.

5 is a cross-sectional view of a plasma display device according to a second embodiment of the present invention.

Referring to FIG. 5, the plasma display apparatus 400 according to the second embodiment of the present invention is generally the same as the first embodiment, but an anti-reflection film 450 is further formed on the entire surface of the filter 440. The anti-reflection film 450 is a hard coating layer, which reduces reflection of light incident from the outside, thereby improving visibility, improving transmittance of visible light emitted from the panel 410, and improving contrast.

The antireflection film 450 has a thickness of 2 to 7 µm, a pencil hardness of 2 to 3H, and a haze of 1 to 3%. This is because it can most effectively prevent the reflectance of the light incident from the outside and have the most efficient transmittance of the visible light emitted from the panel 410.

In addition, the reflective textile film 250 is attached to the entire surface of the filter 440 by a pressure-sensitive adhesive, etc., wherein the pressure-sensitive adhesive may include a color correction pigment or a near-infrared shielding pigment to perform color correction and near-infrared blocking.

6 is a cross-sectional view of a plasma display device according to a third embodiment of the present invention.

Referring to FIG. 6, the plasma display apparatus 500 according to the third embodiment of the present invention is generally the same as the first embodiment, but the lower side of the filter 540, that is, the filter 540 and the transparent spacer 520. The metal deposition layer or the metal oxide deposition layer 550 is further formed between the layers. The metal deposition layer or the metal oxide deposition layer 550 may shield electromagnetic waves emitted from the front surface of the panel 510 and block near infrared rays. The metal deposition layer or the metal oxide deposition layer 550 has excellent electrical conductivity and excellent workability among indium tin oxide (ITO), silver (Ag), copper (Cu), gold (Au), and aluminum (Al). It may be formed of at least one. More preferably, the metal deposition layer or the metal oxide deposition layer 550 may be used as one of ITO, silver (Ag), or a laminate thereof.

When the metal deposition layer or the metal oxide deposition layer 550 is formed of ITO, ITO is a transparent film having a high refractive index and can effectively shield electromagnetic waves, and the metal deposition layer or the metal oxide deposition layer 550 is formed of silver (Ag). ), It is because of its excellent conductivity, infrared reflectivity, and transparency of visible light when formed into multiple layers. However, silver (Ag) is low in chemical and physical stability and deteriorates due to pollutants, water vapor, heat, light, etc. of the surrounding environment, and therefore is stable to silver, gold, platinum, copper, palladium, indium, tin, and the like. It would be desirable to use alloys containing at least one metal.

7 is a cross-sectional view of a plasma display device according to a fourth embodiment of the present invention.

Referring to FIG. 7, the plasma display apparatus 600 according to the fourth embodiment of the present invention is generally the same as the first and third embodiments, but the lower side of the filter 640, that is, the filter 640 is transparent. A mesh metal layer 650 is further formed between the spacers 620. The metal layer 650 may be formed of at least one of silver (Ag), copper (Cu), gold (Au), and aluminum (Al) having excellent electrical conductivity and excellent workability. As such, since the metal layer 650 is formed in a mesh shape, it is possible to more effectively prevent electromagnetic waves generated from the panel 610. More specifically, the mesh-shaped metal layer 650 may prevent electromagnetic waves by adjusting the resistance per unit length of the metal and the line width and pitch of the metal wire. For example, when the mesh-shaped metal layer 650 is formed of silver or copper, the line width of the metal wire is 30 μm and the spacing is 270 to 300 μm to improve the transmittance and the electromagnetic shielding efficiency of light emitted from the panel 610. You can.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, according to the present invention, a heat radiation space is formed between the panel and the filter of the plasma display device, thereby releasing heat generated from the panel and reducing noise.

Claims (9)

A plasma display panel; It includes a filter provided on one side of the panel, And a heat dissipation space formed by a transparent spacer provided between the plasma display panel and the filter. The plasma display apparatus of claim 2, wherein the transparent spacer is one of an acrylic group. The plasma display apparatus of claim 1, wherein the filter is a direct-attach film. The plasma display apparatus of claim 1, wherein the light transmittance of the filter is 30 to 80%, and the haze is 1 to 3%. The plasma display apparatus of claim 1, further comprising an anti-reflection film on at least one side of the filter. The plasma display apparatus of claim 1, further comprising a metal deposition layer on at least one side of the filter. The plasma display apparatus of claim 1, further comprising a metal oxide deposition layer on at least one side of the filter. The plasma display apparatus of claim 1, further comprising a mesh metal layer on at least one side of the filter. The plasma display apparatus of claim 1, wherein the panel comprises a front substrate and a back substrate coupled to face each other, and a plurality of cells between the front substrate and the back substrate.

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