Lg Electronics Inc.

Sam Je Cho

Hong Rae Cha

Ji Hoon Sohn

Woon Seo Shin

Woo Sung Jang

Jung Gwan Han

Joon Kwon Moon

Jaeyoung Oh

Kang Yoon Kim

Seoung Won Lee

Jin Hyung Ryu

A plasma display device is provided. The plasma display device includes a plasma display panel (PDP) which includes an upper substrate on which a plurality of black matrices are formed; and an external light shielding sheet which is disposed at a front of the PDP and includes a base unit and a plurality of pattern units that are formed on the base unit and that have a lower refractive index than the base unit. A distance between a pair of adjacent black matrices is 4-12 times greater than a distance between a pair of adjacent pattern units. Therefore, it is possible for a plasma display device to effectively realize black images and enhance bright room contrast with the aid of an external light shielding sheet which is disposed at a front of a PDP and which absorbs and shields as much external light incident upon the PDP as possible. Also, it is possible to reduce the probability of occurrence of the moire phenomenon and enhance the luminance of images displayed by a PDP by forming a plurality of pattern units on an external light shielding sheet so that the distance between the pair of adjacent pattern units can fall within a predetermined percentage range of the distance between the pair of adjacent black matrices formed on a PDP, or that the width of the pattern units can fall within a predetermined percentage range of the width of black matrices formed on the PDP.

Filter and plasma display device thereof

A display apparatus includes a plasma display panel (PDP) and a filter. The PDP has a display surface, and the filter has a panel side facing the display surface of the PDP and an opposing viewer side facing away from the display surface. The filter includes a base unit. The filter also includes pattern units that absorb external light from the viewer side. The pattern units have boundaries that define widths of pattern tops and widths of pattern bottoms. A distance between a pattern top and a pattern bottom defines a pattern height. A distance between adjacent boundaries, of a pair of adjacent pattern units, at adjacent pattern bottoms can be less than a distance between the adjacent boundaries at adjacent pattern tops, less than the pattern height, and greater than a width of at least one of the pattern bottoms.

Filter, plasma display device thereof, and related technologies

An improved structure of a plasma display apparatus is provided. At least one of an integrated circuit and a driving board is formed over an edge potion of a frame for supporting a plasma display panel. Thus, the plasma display apparatus is manufactured to be thin and light, and also its manufacturing cost decreases.

Plasma display apparatus

A plasma display device is provided. The plasma display device includes a plasma display panel (PDP) and an external light shield sheet which absorbs external light incident upon the PDP. The external light shield sheet includes a base unit and a plurality of pattern units which are formed in the base unit. Each of the pattern units contains 2-10 weight % of light absorption particles having a size of 1 &#x3bc;m or less. Since the external light shield sheet which can absorb and shield as much external light as possible is disposed at the front of the PDP, the plasma display device can effectively realize black images and improve bright room contrast.

External light shield sheet and plasma display device using the same

A display apparatus includes a plasma display panel (PDP) having an upper substrate at which black matrices are disposed. The apparatus includes an external light shield having a panel side facing a display surface of the PDP and an opposing viewer side facing away from the display surface. The light shield includes a base unit and includes pattern units that absorb external light from the viewer side. The pattern units have boundaries defined by intersections of the pattern units and the base unit. The boundaries define widths of pattern tops disposed toward the panel side or the viewer side and define widths of pattern bottoms disposed toward the other of the panel side and the viewer side. A distance between a pair of adjacent black matrices is 4 to 12 times greater than a distance between adjacent boundaries, of a pair of adjacent pattern units, at adjacent pattern bottoms.

Plasma display device

The present disclosure relates to a plasma display device including a plasma display panel and a sheet disposed at a front surface of the plasma display panel to protect the plasma display panel from external light. The sheet includes a base unit formed with a plurality of grooves and a plurality of pattern unit lines formed on the plurality of grooves of the base unit and has a refractive index different from that of the base unit. The number of the pattern unit lines overlapped with any one of a plurality of discharge cells formed in the panel is 8 to 25. A lower end of the pattern unit lines has a width larger than an upper end of the pattern unit lines, and the upper end of the pattern unit lines is closer to the plasma display panel.

Sheet for protecting external light and plasma display device thereof

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.

A display apparatus includes a plasma display panel (PDP) and a filter having a panel side facing a display surface of the PDP and an opposing viewer side facing away from the display surface. The filter includes an external light shield having a first base unit and first pattern units. The first pattern units absorb external light from the viewer side and are substantially parallel to a first axis. The filter includes an electromagnetic interference (EMI) shield overlapping the external light shield. The EMI shield includes a second base unit and second pattern units. The second pattern units are conductive and substantially parallel to a second axis. An interior angle between the first axis and the second axis can be within a range of 40 to 50 degrees.

Filter and plasma display device

Disclosed is a semiconductor package and method for package a semiconductor that has high reliability. A semiconductor package according to the present invention comprises a first substrate on which a circuit pattern and an electrode pad are formed; a second substrate which is adhered to the first substrate and on which a hole is formed; and a solder ball adhered to the electrode pad through the hole formed on the second substrate. Then, the second substrate is used as a solder resist. Accordingly, since the first substrate and the second substrate are formed of same material, the BGA package can be prevented from being cracked and being nonuniform when fired.

Growing community of inventors

Seoul, South Korea

Sam Je Cho