Plasma display apparatus

Abstract

Disclosed is an optical filter having an electromagnetic shield capable of shielding unnecessary radiation of electromagnetic waves from a PDP, in which satisfactory reduction of undesired radiation is achieved even by employing a relatively low price optical filter. A plasma display apparatus of the invention includes: a conductive rear surface cover covering a rear surface of a plasma display panel; an optical filter provided with an conductive layer having a surface resistance of 0.5 Ω/square or above, which is disposed at the front surface of the plasma display panel and serves to reduce leakage of electromagnetic waves from the plasma display panel; optical filter protecting members electrically connected with the rear surface cover, for protecting/retaining the optical filter; and a conductive body having elasticity, which is interposed between the optical filter and the optical filter protecting member. A plurality of bosses are formed in the optical filter protecting members. A part of the elastic conductive body is compressed by the bosses and connection resistance with the elastic conductive body is reduced.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The above aspects and features of the present invention will be more apparent by describing certain embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is an exploded perspective view of main parts of a plasma display apparatus in accordance with the present invention;

FIG. 2 is a partial, cross sectional view of main parts of a plasma display apparatus, in accordance with a first embodiment of the present invention;

FIG. 3 is a diagram showing the arrangement of bosses formed in a fixing member, in accordance with the first embodiment of the present invention;

FIG. 4 is a partial, detailed sectional view around a conductive gasket portion, in accordance with the first embodiment of the present invention;

FIG. 5 is a graph showing the relation between resistivity and repulsive force and compressibility of the conductive gasket; and

FIG. 6 is a partial, cross sectional view showing main parts of a plasma display apparatus, in accordance with a second embodiment of the present invention.

Claims

1. A plasma display apparatus, comprising: a plasma display panel;an optical filter provided with a conductive electromagnetic shield formed on a front surface of the plasma display panel;a conductive rear surface cover covering a rear surface of the plasma display panel;a plurality of bosses electrically connected to the rear surface cover; andan elastic conductive body having elasticity,

2. The plasma display apparatus of claim 1 further comprises: an optical filter protecting member electrically connected with the rear surface cover, for protecting/retaining the optical filter,

3. A plasma display apparatus, comprising: a plasma display panel;an optical filter provided with a conductive electromagnetic shield formed on a front surface of the plasma display panel;a conductive rear surface cover covering a rear surface of the plasma display panel;a filter protecting member electrically connected with the rear surface cover, for protecting/retaining the optical filter; anda conductive body having elasticity,

4. The plasma display apparatus of claim 3, wherein the electromagnetic shield has a surface resistance not lower than 0.5 Ω/square.

5. The plasma display apparatus of claim 3, wherein the electromagnetic shield is a transparent conductive film type.

6. The plasma display apparatus of claim 3, wherein the filter protecting member has a case shape to encompass the plasma display panel, and a plurality of the bosses are formed in each side of the filter protecting member.

7. A plasma display apparatus, comprising: a plasma display panel;a conductive rear surface cover covering a rear surface of the plasma display panel;an optical filter provided with an conductive layer having a surface resistance of 0.5 Ω/square or above, which is disposed at the front surface of the plasma display panel and serves to reduce leakage of electromagnetic waves from the plasma display panel;optical filter protecting members electrically connected with the rear surface cover, for protecting/retaining the optical filter; anda conductive body having elasticity, which is interposed between the optical filter and the optical filter protecting member,

8. The plasma display apparatus of claim 7, wherein a thickness of the conductive body before installation is about 3.0 mm, a gap between the conductive optical filter and the optical filter protecting member is about 2.0 mm, and a height of the boss is about 1.2 mm.

9. The plasma display apparatus of claim 7, wherein the conductive body is a gasket.

10. The plasma display apparatus of claim 7, wherein a ratio of compressibility of the conductive body compressed by the bosses of the optical filter protecting member and the optical filter to compressibility of the conductive body compressed by a portion where the bosses of the optical filter protecting member are not formed and the optical filter is 2.66 which is greater than 1.

11. The plasma display apparatus of claim 7, wherein a ratio of a height of the boss to a thickness of the conductive body before installation is less than 0.5.

12. The plasma display apparatus of claim 7, wherein the optical filter protecting member reduces leakage of electromagnetic waves at least from a peripheral portion of the optical filter.