Lg Electronics Inc.

Seoung Won Lee

Jun Seok Lee

Jin Hong Kim

Kyung Chan Park

Hun Chul Seo

Hong Rae Cha

Ji Hoon Sohn

Woon Seo Shin

Woo Sung Jang

Sam Je Cho

Kang Yoon Kim

The present invention is directed to an optical disk having a projection that prevents full contact of the upper surface of the disk when engaging a supporting surface. The optical disk includes a projection formed in a central portion of the optical disk that abuts or is near the upper surface of a protecting layer.

Optical disk having a projection with lateral inclined surface

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.

Filter and plasma display device thereof

Growing community of inventors

Daejeon-si, South Korea

Seoung Won Lee