KR20050037722A - Plasma display apparatus - Google Patents

Abstract

An object of the present invention is to provide a plasma display apparatus in which deformation of a reinforcement part is reduced. To achieve this object, the present invention provides a plasma display panel, a chassis base disposed on a rear surface of the plasma display panel, and the plasma display panel. And at least one heat transfer medium disposed between the chassis base and a reinforcement portion disposed on a rear surface of the chassis base and supporting the chassis base, wherein the reinforcement portion includes at least one horizontal reinforcement portion supporting the chassis base; And at least one longitudinal reinforcing part, wherein the vertical reinforcing part is disposed on the rear surface of the chassis base while covering the whole or part of the projection surface of the heat transfer medium to the rear surface of the chassis base.

Description

Plasma display apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a plasma display device having a reinforcement part on a rear surface of a chassis base.

Plasma display device is a flat panel display device that displays images by using gas discharge phenomenon. It has excellent display capability such as display capacity, brightness, contrast, afterimage and viewing angle, and is thin and can display large screen. It is attracting attention as the next generation large flat panel display device that can replace the.

1 is an exploded perspective view schematically showing an example of such a general plasma display apparatus 100. In general, the plasma display apparatus 100 includes a plasma display panel 10 including a front substrate 11 and a rear substrate 12 and representing a character or an image by using gas discharge, and a chassis base disposed on a rear surface of the plasma display apparatus 100. 20 and a circuit board 30 disposed on the rear surface of the chassis base 20 and driving the plasma display panel 10. A heat transfer medium 40a, 40b, 40c is inserted between the chassis base 20 and the plasma display panel 10 to transfer heat generated from the plasma display panel 10 to the chassis base 20. Heat transferred to the chassis base 20 through the heat transfer mediums 40a, 40b, 40c is released to the outside.

Since the plasma display apparatus 100 tends to be thin, it is required that the thickness of the plasma display panel 10, the chassis base 20, and the like be as thin as possible. In particular, unlike the plasma display panel 10 having a complicated structure therein, the chassis base 20 has a function of releasing heat transferred from the plasma display panel 10 and supporting the plasma display panel 10. It is formed of a high thermal conductivity metal such as aluminum.

However, when the thickness of the chassis base 20 becomes thin in order to reduce the thickness of the plasma display apparatus 100, it becomes difficult to perform a function of supporting the plasma display panel 10. Therefore, reinforcing portions 51a, 51b, 51c, 52a, and 52b are provided on the rear surface of the chassis base 20 in order to prevent twisting and bending of the chassis base 20. As illustrated, the horizontal reinforcement portions 51a, 51b, 51c and the vertical reinforcement portions 52a, 52b are provided as the reinforcement portions 51a, 51b, 51c, 52a, and 52b.

FIG. 2 illustrates a plasma display apparatus 100 in the direction A of FIG. 1. Referring to the drawings, the driving circuit board 30 and the reinforcement parts 51a, 51b, 51c, 52a, and 52b are disposed on the rear surface of the chassis base 20. The portion indicated by the dotted line indicates the projection surfaces 45a, 45b, 45c on the rear surface of the chassis base 20 where the thermally conductive media 40a, 40b, 40c. In addition, the interval projection surfaces 47a and 47b in which an interval (not shown) between the thermal conductive media 40a, 40b, and 40c are projected on the rear surface of the chassis base 20 and the projection surfaces 45a and 45b of the rear surface of the chassis base 20 are shown. 45c and the outer projection surface 49, which are parts other than the interval projection surfaces 47a and 47b, are shown. The horizontal reinforcement portions 51a, 51b, and 51c are disposed on the outer projection surface 49 on the rear surface of the chassis base 20, and the left vertical reinforcement portion 52a is disposed on the left interval projection surface 47a to form a horizontal reinforcement portion ( 51a, 51b, 51c). Further, the right vertical reinforcement 52b is also disposed on the right gap projection surface 47b and connected to the horizontal reinforcement 51a, 51b, 51c.

In the general plasma display apparatus 100, since heat is transferred from the plasma display panel 10 to the chassis base 20 by the heat transfer media 40a, 40b, 40c, the heat transfer media 40a, 40b, 40c. The temperature distribution becomes uneven over the rear surface of the chassis base 20 depending on whether or not the installation is performed, and a temperature difference is formed. Therefore, when the overall temperature of the chassis base 20 increases, the difference in material between the chassis base 20 and the reinforcing portions 51a, 51b, 51c, 52a, 52b, and the uniformity of the back surface of the chassis base 20 There was a problem that bending or torsion occurred in the reinforcing portions 51a, 51b, 51c, 52a, and 52b due to the undistributed temperature distribution. In particular, a problem arises in that local thermal deformation occurs in the vertical reinforcement portions 52a and 52b provided on the gap projection surfaces 47a and 47b.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a plasma display apparatus in which deformation of the reinforcing portion is reduced.

In order to achieve the above object, the present invention provides a plasma display panel, a chassis base disposed on the rear surface of the plasma display panel, at least one heat transfer medium disposed between the plasma display panel and the chassis base, and the chassis base. A reinforcement portion disposed on a rear surface of the reinforcement portion and supporting the chassis base, the reinforcement portion including at least one horizontal reinforcement portion and at least one longitudinal reinforcement portion for supporting the chassis base, wherein the longitudinal reinforcement portion is formed in the heat transfer medium. The present invention provides a plasma display apparatus, wherein the plasma display apparatus is disposed on the rear surface of the chassis base while covering the entirety or a part of the projection surface on the rear surface of the chassis base.

In the present invention, preferably, the heat transfer medium may be one.

In the present invention, preferably, the reinforcing portion may be a rigid material.

At this time, the reinforcing portion may be a metal.

In this case, preferably, the metal may be steel.

In this case, preferably, the metal may be aluminum.

In this case, preferably, the horizontal reinforcement may be aluminum, and the vertical reinforcement may be steel.

In the present invention, preferably, the reinforcing part may be disposed to be symmetrical on the rear surface of the chassis base.

In the present invention, preferably, the reinforcing portion may have a bar shape.

In the present invention, preferably, a portion of the front surface of the reinforcing portion may be spaced apart from the chassis base so as to reduce the contact area with the chassis base.

In this case, a groove may be preferably formed in a part of the front surface of the reinforcement part.

In this case, preferably, the reinforcing portion may be bent into an uneven shape.

In this case, the irregularities may be arc-shaped.

In the present invention, preferably, the heat transfer medium may be high-oriented graphite.

In the present invention, preferably, the heat transfer medium may be aluminum.

In the present invention, preferably, the heat transfer medium may be silicon.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 3 or FIG. 4, a plasma display apparatus 200 according to an exemplary embodiment of the present invention is shown.

3 is an exploded perspective view of the plasma display apparatus 200. As shown, the plasma display apparatus 200 includes a plasma display panel 110 including a front substrate 111 and a rear substrate 112, a chassis base 120 disposed on a rear surface thereof, and a chassis base 120. The circuit board 130 is disposed on the rear surface of the panel) and drives the plasma display panel 110. Three heat transfer media 140a, 140b, and 140c are inserted between the plasma display panel 110 and the chassis base 120 to transfer heat generated from the plasma display panel 110 to the chassis base 120. The heat transfer mediums 140a, 140b, 140c preferably use aluminum having high thermal conductivity, high-oriented graphite, or silicon. In particular, when aluminum is used as the heat transfer mediums 140a, 140b, and 140c, since the material is the same as that of the chassis base 120, the thermal deformation caused by the difference in materials is reduced.

The rear surface of the chassis base 120 is provided with reinforcing parts 151a, 151b, 152a, and 152b to prevent bending or twisting of the chassis base 120. As shown, two horizontal reinforcing parts 151a and 151b and two vertical reinforcing parts 152a and 152b are provided as reinforcing parts 150. In addition, the reinforcement parts 151a, 151b, 152a, and 152b are symmetrically disposed on the rear surface of the chassis base 120. Preferably, when an external force is applied to the reinforcement parts 151a, 151b, 152a, and 152b, or a stress is generated in the reinforcement parts 151a, 151b, 152a, and 152b by thermal expansion, the reinforcement parts (11) are distributed evenly. Preferably, 151a, 151b, 152a, 152b are disposed symmetrically on the back of chassis base 120.

4 illustrates the plasma display apparatus 200 in the direction B of FIG. 3. The driving circuit board 130 and the reinforcement parts 151a, 151b, 152a, and 152b are disposed on the rear surface of the chassis base 120. The part shown by the dotted line shows the projection surface 145a, 145b, 145c to the chassis base 120 back surface of the thermal conductive medium 140a, 140b, 140c. In addition, the space between the thermally conductive mediums 140a, 140b, 140c is projected on the rear surface of the chassis base 120, and the projection surfaces 145a, 145b, and 145c of the rear surface of the chassis base 120. The outer projection surface 149 is shown except for the interval projection surfaces 147a and 147b. The horizontal reinforcement parts 151a and 151b are disposed on the outer projection surface 149 on the rear surface of the chassis base 120, and the left vertical reinforcement part 152a covers a portion of the left projection surface 145a while the horizontal reinforcement parts 151a are disposed. , 151b). In addition, the right vertical reinforcement part 152b is also connected to the horizontal reinforcement parts 151a and 151b while covering a part of the right projection surface 145c. Preferably, when the longitudinal reinforcement parts 152a and 152b are installed while covering the whole or part of the projection surfaces 145a, 145b and 145c, the bending or twisting of the reinforcement parts 151a, 151b, 152a and 152b due to thermal deformation is performed. The likelihood is reduced.

The reinforcement parts 151a, 151b, 152a, and 152b may be manufactured using various materials, but it is preferable to use a rigid material for stable support of the chassis base 120. Particularly, as the rigid material, materials such as aluminum and steel are excellent in rigidity and workability, so that the reinforcement parts 151a, 151b, 152a, and 152b are preferably manufactured using them. In particular, when aluminum is used as the reinforcement parts 151a, 151b, 152a, and 152b in consideration of generally used aluminum for the chassis base 120, the chassis base 120 and the reinforcement parts 151a, 151b, 152a, and 152b are used. The difference in thermal expansion resulting from the difference in the material of c) is reduced. In addition, the reinforcement parts 151a, 151b, 152a, and 152b may be manufactured using the same material as the horizontal reinforcement parts 151a and 151b and the vertical reinforcement parts 152a and 152b, but the temperature of the rear surface of the chassis base 120 In consideration of the installation position of the reinforcing parts (151a, 151b, 152a, 152b), it can be manufactured using other materials. Preferably, the longitudinal reinforcement parts 152a and 152b disposed across the projection surfaces 145a and 145c of the heat transfer medium having a relatively high temperature are made of steel because of their large thermal expansion, and the horizontal reinforcement parts 151a and 151b. In the case of using aluminum, deformation of the reinforcement parts 151a, 151b, 152a, and 152b due to the difference in heat deformation is reduced.

5 is a cross-sectional view of the plasma display apparatus 200 taken along the line C-C of FIG. In particular, a cross section of the horizontal reinforcement 151a is illustrated in part D of FIG. 5. As shown, the bar (bar) is provided as a horizontal reinforcement portion (151a), and the vertical reinforcement (152a, 152b) as well as the horizontal reinforcement (151a, 151b) bar is simplified and reinforced 151a , 151b, 152a, and 152b are preferred.

Another embodiment of part D of FIG. 6 is shown in FIGS. 6A-6C. Referring to FIG. 6A, a groove 173 is formed on a front surface of a front surface of the horizontal reinforcement part 151a so as to be spaced apart from the chassis base 120. In the case of the vertical reinforcement parts 152a and 152b, the groove 173 is preferably formed like the horizontal reinforcement parts 151a and 151b. Since the heat transfer area is reduced by the groove portion 173, heat transfer from the chassis base 120 is also reduced. Therefore, the thermal expansion of the reinforcing portions 151a, 151b, 152a, and 152b is reduced, thereby reducing the possibility of bending or warping due to thermal deformation.

6B shows that the rectangular concave-convex 185 is formed in the cross section of the reinforcement parts 151a, 151b, 152a, and 152b. As shown, by forming the irregularities 185 in the plate (not shown), the spaced space 183 with the chassis base 120 is formed to reduce heat transfer to the reinforcing parts (151a, 151b, 152a, 152b). Thus, not only the deformation of the reinforcement parts 151a, 151b, 152a, and 152b due to thermal expansion is reduced, but also bolts (not shown) to the chassis base 120 using the contact portion 187 with the rear surface of the chassis base 120. ), Etc., to make tightening easier. In addition, since the unevenness 185 can be easily formed by bending the plate (not shown), the cost is reduced.

6C shows a cross section of the reinforcing portions 151a, 151b, 152a, and 152b having an uneven shape arc 195. Since the chassis base 120 and the reinforcement portions 151a, 151b, 152a, and 152b are spaced apart from the predetermined portion 193, heat transfer from the chassis base 120 to the reinforcement portions 151a, 151b, 152a, and 152b is reduced. . Therefore, deformation of the reinforcement parts 151a, 151b, 152a, and 152b is suppressed due to thermal expansion due to the temperature rise of the reinforcement parts 151a, 151b, 152a, and 152b. In addition, as described above, by using the contact portion 197 with the rear surface of the chassis base 120, the fastening to the chassis base 120 using bolts or the like may be simplified.

FIG. 7 is a diagram illustrating a plasma display apparatus 300 showing one case of one thermally conductive medium 240, and the overall arrangement may refer to the plasma display apparatus 200 of FIG. 3. As shown, the projection surface 245 of the thermally conductive medium 240 is indicated by a dotted line on the rear surface of the chassis base 220. The remaining portion of the rear surface of the chassis base 220 except for the projection surface 245 is defined as the outer projection surface 249. The horizontal reinforcement parts 251a and 251b are respectively installed in the upper and lower portions of the outer projection surface 249 in the horizontal direction. have. In addition, the left and right longitudinal reinforcement parts 252a and 252b are provided while covering a part of the projection surface 245, and the central transverse reinforcement parts 251c connect the center portions of the vertical reinforcement parts 252a and 252b. . It is preferable that the longitudinal reinforcement portions 252a and 252b are provided while covering the whole or part of the projection surface 245 because the bending and the warping of the reinforcement portions 251a, 251b, 251c, 252a, and 252b due to thermal expansion can be suppressed. .

For the material or shape of the reinforcing parts 251a, 251b, 251c, 252a, and 252b, refer to the plasma display apparatus 200 described above.

In addition, in the case of the heat transfer medium 240, as in the plasma display apparatus 200 described above, it is preferable that the heat transfer medium 240 is used as aluminum, high orientation side film, or silicon having high thermal conductivity. In particular, when aluminum is used as the heat transfer medium 240, since the material is the same as that of the chassis base 220, the heat deformation caused by the difference in materials is reduced.

Like reference numerals in the drawings shown above indicate the same members.

According to the plasma display device of the present invention as described above has the following advantages.

First, when the longitudinal reinforcement part is installed covering the whole or part of the projection surface onto the chassis base back side of the heat transfer medium, the bending or twisting phenomenon of the reinforcement part caused by the difference in thermal expansion of the chassis base and the reinforcement part is reduced.

Second, when a part of the front surface of the reinforcement part is spaced apart from the chassis base, thermal expansion of the reinforcement part is reduced by heat transfer, and thus deformation of the reinforcement part is reduced.

Third, when the reinforcement part is disposed symmetrically on the rear surface of the chassis base, the stress distribution received by the reinforcement part by thermal expansion of the reinforcement part and the chassis base is evened, and the possibility of stress concentration is reduced.

Fourth, when steel with a small coefficient of thermal expansion is used as the longitudinal reinforcement part and aluminum with a large coefficient of thermal expansion is used as the horizontal reinforcement part, the chassis base can be stably supported and the reinforcement part is optimized according to the temperature distribution. The possibility of deformation of the reinforcement is reduced.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is an exploded perspective view illustrating a general plasma display device;

FIG. 2 is a diagram illustrating a plasma display device in a direction A of FIG. 1.

3 is an exploded perspective view showing a plasma display device according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a plasma display device in a direction B of FIG. 3.

5 is a cross-sectional view of the plasma display device taken along the line C-C of FIG.

6 (6a, 6b, 6c) is a view showing another embodiment of the portion D of FIG.

7 illustrates a plasma display device according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

110: plasma display panel 120: chassis base

130: driving circuit board 140a, 140b, 140c: heat transfer medium

145a, 145b, 145c: projection plane 147a, 147b: gap projection plane

149: outer projection surface 151a, 151b: horizontal reinforcement

152a, 152b: vertical reinforcement 200: plasma display device

Claims (16)

A plasma display panel; A chassis base disposed on a rear surface of the plasma display panel; At least one heat transfer medium disposed between the plasma display panel and the chassis base; And A reinforcement part disposed on a rear surface of the chassis base and supporting the chassis base, The reinforcement portion includes at least one horizontal reinforcement portion and at least one longitudinal reinforcement portion for supporting the chassis base, wherein the longitudinal reinforcement portion covers the whole or a portion of the projection surface of the heat transfer medium to the chassis base backside. Plasma display device, characterized in that disposed on the back. The plasma display apparatus of claim 1, wherein the heat transfer medium is one. The plasma display apparatus of claim 1, wherein the reinforcing portion is made of a rigid material. The plasma display apparatus of claim 3, wherein the reinforcement part is a metal. The plasma display apparatus of claim 4, wherein the metal is steel. The plasma display apparatus of claim 4, wherein the metal is aluminum. The plasma display apparatus of claim 4, wherein the horizontal reinforcement part is aluminum and the vertical reinforcement part is steel. The plasma display apparatus of claim 1, wherein the reinforcement part is disposed to be symmetrical to the rear surface of the chassis base. The plasma display apparatus of claim 1, wherein the reinforcing portion has a bar shape. The plasma display apparatus of claim 1, wherein a portion of a front surface of the reinforcement part is spaced apart from the chassis base so as to reduce a contact area with the chassis base. The plasma display apparatus of claim 10, wherein a groove is formed on a portion of the front surface of the reinforcement part. The plasma display apparatus of claim 10, wherein the reinforcement part is bent in an uneven shape. The plasma display device according to claim 12, wherein the irregularities are arc-shaped. The plasma display apparatus of claim 1, wherein the heat transfer medium is high-oriented graphite. The plasma display apparatus of claim 1, wherein the heat transfer medium is aluminum. The plasma display apparatus of claim 1, wherein the heat transfer medium is silicon.