Filter and plasma display device thereof

Details Filter and plasma display device thereof Filter and plasma display device thereof

2007-08-16

2010-10-19

Macchiarolo, Peter J (Department: 2879)

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

C313S582000, C313S111000

Reexamination Certificate

active

07816844

ABSTRACT:
The plasma display device comprises a plasma display panel and the filter which is formed at a front of the plasma display panel, wherein the filter includes an external light shielding sheet which comprises a base unit, and a plurality of pattern units formed on the base unit, wherein a bottom of the pattern units, which is wider than a top of the pattern units, comprises a concave having a curvature. The device can improve bright room contrast. Also, the sharpness of the display images may be enhanced by reducing the bleeding phenomenon of the display images as well as the adhesiveness of the filter may be enhanced by forming the bottom of the pattern units of the external light shielding sheet as a concave shape in which the center area is depressed into the inside.

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European Search Report dated May 29, 2009 for Application No. 01774354.9, 6 pages.

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