Lg Electronics Inc.

Eun Seong Seo

Hong Rae Cha

Ji Hoon Sohn

Woon Seo Shin

Joon Kwon Moon

Jin Woo Park

Young Woon Kim

Ji Hyouk Chung

Gi Jin Kwon

Ho Young Choi

Jeong Ho Shin

Ki Hoon Song

There are provided an electromagnetic shielding sheet and a plasma display apparatus. The electromagnetic shielding sheet includes a base sheet; a first layer on a first surface of the base sheet, the first layer including first and second patterns crossing each other; and a second layer on a second surface of the base sheet, the second layer including a third pattern. The first and second patterns include a conductive material, the third pattern includes a light absorbing material, and at least one of the first and second patterns is grounded. Accordingly, conductive patterns for shielding electromagnetic waves and blocking external light are formed on a first surface of a base sheet, and patterns for blocking external light are formed on a second surface of the base sheet, so that the functions of shielding electromagnetic waves and blocking external light can be simultaneously performed using one sheet, and therefore, the ambient contrast ratio of a display image can be enhanced without increasing manufacturing costs. Further, patterns for shielding electromagnetic waves are directly formed a glass member of a filter or an upper substrate of the panel, so that processes of forming an electromagnetic shielding sheet can be easily performed.

Electromagnetic shielding sheet, plasma display apparatus using the same, and related technology

A filter and a plasma display device (PDP) having the same may include a plasma display panel, an EMI shielding sheet having a plurality of shielding layers each including three or more thin film layers, and a protection sheet including a base unit having a plurality of grooves formed in one surface thereof and a plurality of pattern units formed in the grooves and having a different refractive index from that of the base unit.

Filter and plasma display device thereof

The present invention relates to a filter and a plasma display device including the filter. The filter is formed on a front surface of a plasma display panel of the plasma display device and includes a first base layer; a second base layer having refractive index smaller than that of the first base layer; and a sheet for protecting external light including a plurality of pattern units formed to be spaced from each other between the first and second base layers, wherein an interval between two pattern units adjacent each other of the plurality of pattern units being larger than a height of the pattern unit.

An illumination device and a projection system including the same are disclosed. The illumination device can implement a small-sized and high-efficiency projection system, and the projection system includes the illumination device. The projection system generates a light signal in which a luminous flux is maximally distributed, and displays a desired image using the generated light signal.

Switch for an illumination device, and projection system including the same

A polarization conversion system comprises a glass substrate; reflection type polarization plates, formed between top and bottom surfaces of the glass substrate and inclined at a predetermined angle, separating unpolarized incident light into two polarization directions where two directions are at a right angle to each other; polarization conversion plates coupled to the reflection type polarization plates, converting a polarization direction of polarization light by the reflection type polarization plates; and reflection plates positioned in parallel with the reflection type polarization plates, reflecting incident light from the reflection type polarization plates.

Polarization conversion system

The present invention relates to a projection system that can be applied to a projection TV or a projection monitor, and more particularly, to a projection system that can improve a contrast while maintaining a proper brightness of a set where the projection system is applied.

Growing community of inventors

Seoul, South Korea

Eun Seong Seo