Lg Display Co., Ltd.

Lg Philips Lcd Co., Inc.

Man Hoan Lee

Sung Keun Lee

Won Taek Moon

Ji Su Yoon

Jae Hyun Park

Ha Young Lee

Un Nyoung Sa

Hyung Ki Hong

Joung Won Woo

Soon Bum Kwon

Yuriy A Reznikov

Su Hyun Park

Ku Hyun Park

Young Hun Jeong

Jae Kyung Kang

Jin Hyuk Kwon

Hoe Sup Soh

Yuriy Kurioz

Igor Gerus

Jun Kyu Paik

Provided are an optical sheet, a backlight unit and an LCD device having the same. The backlight unit includes a first layer, a second layer, and a refractive pattern. The first layer has a larger refractivity than an air layer, and the second layer has a larger refractivity than the first layer. The refractive pattern is disposed at a boundary surface between the first layer and the second layer and has ridges and furrows that change a traveling path of light. The optical sheet refracts light at least three times to condense the light in a direction perpendicular to a light-exiting surface.

Optical sheet, backlight unit and liquid crystal display device having the same

Disclosed is a compensation film, a manufacturing method thereof and a liquid crystal display, which can obtain a wider viewing angle. The liquid crystal display can secure a wider viewing angle by providing the compensation film formed of multi-layered cholesteric liquid crystal layers.

Compensation film, manufacturing method thereof and liquid crystal display using the same

A back light unit for a liquid crystal display device for improving uniformity of the light and dispensing with optical sheets. The back light unit includes a light source having a holographic pattern formed on a surface thereof opposite the display device which is to display a picture, and a reflective plate under the light source.

Direct type back light unit for liquid crystal display device

A prism sheet, a back light unit using the same and liquid crystal display device having the back light unit are disclosed, for improvement of light concentration, frontal luminance and viewing angle, in which the prism sheet includes a light-condensing film. The light condensing film has a plurality of prism peaks, each having a triangular cross section inclined surface which is inclined from a top surface of the light-condensing film at an angle of about 20&#xb0; to about 40&#xb0;.

Prism sheet, back light unit using the same and liquid crystal display device having the back light unit

An optical sheet and a backlight unit using the same are disclosed, in which deviation of a viewing angle is minimized to improve picture quality. The optical sheet includes a diffusion sheet provided with a plurality of diffusion patterns diffusing incident light in at least two directions to allow the incident light to have different strengths.

Optical sheet and backlight unit using the same

An in-plane switching mode liquid crystal display device, comprising first and second substrates attached to face each other; a liquid crystal layer between the first and second substrates; a first polarization film and a second polarization film on the first substrate and the second substrate, respectively, each of the first and second polarization films simultaneously performing an A-plate compensation film function and a polarization function, the first and second polarization films prevent light leakage in a horizontal direction; and a C-plate compensation film positioned on the second substrate, the C-plate compensation film prevents light leakage in a vertical direction.

In-plane switching mode liquid crystal display device and method of fabricating the same

A prism sheet capable of enhancing light efficiency and viewing angle characteristics, a backlight unit using the prism sheet, and a method for fabricating the prism sheet are disclosed. The prism sheet includes a transparent substrate, a plurality of grooves formed in an upper surface of the transparent substrate to extend in a parallel direction with each other and to be uniformly spaced apart from one another by a predetermined distance, a plurality of reflection patterns respectively formed in the grooves, and a plurality of lenticular lenses formed on the upper surface of the transparent substrate formed with the reflection patterns.

Prism sheet, backlight unit using the same, and method for fabricating the prism sheet

A back light unit is disclosed, which improves condensing efficiency of light and viewing angle characteristics. The back light unit includes at least one lamp generating light, a light guide plate emitting light across a surface thereof using the light generated from the lamp, a diffusion sheet arranged above the light guide plate to diffuse the light passing through the light guide plate, a first condensing sheet condensing the light from the diffusion sheet using a plurality of first elliptical condensing patterns arranged on the diffusion sheet in a first direction, and a second condensing sheet further condensing the light from the first condensing sheet using a plurality of second elliptical condensing patterns arranged on the first condensing sheet in a second direction crossing the first direction.

Back light unit

The present invention relates to an optical efficiency enhancing film and an LCD using the same. The LCD of the present invention is provided with an optical efficiency enhancing film that includes uniaxial films made of a refractive index anisotropic material and isotropic films, wherein the uniaxial films and the isotropic films are alternatively laminated. Then, optical efficiency as well as polarization may be enhanced to thereby improve the brightness of the LCD.

Optical efficiency enhancing film and liquid crystal display using the same

A liquid crystal display device includes a transparent insulating substrate, a gate line and a gate electrode on the transparent insulating substrate, a gate insulating film, an active layer, an ohmic contact layer, source and drain electrodes and a data line on the transparent insulating substrate, a passivation film formed on the transparent insulating substrate including the source and drain electrodes and the data line, a polarizing film formed on the passivation film, and a pixel electrode formed on at least the polarizing film.

Liquid crystal display device and method of fabricating the same

A liquid crystal display device includes a transparent insulating substrate, a gate line and a gate electrode on the transparent insulating substrate, a gate insulating film, an active layer, an ohmic contact layer, source and drain electrodes, and a data line on the transparent insulating substrate, a passivation film formed on the transparent insulating substrate including the source and drain electrodes and the data line, a compensation film formed on the passivation film, and a pixel electrode formed on at least the compensation film.

A prism sheet capable of achieving an enhancement in light efficiency and viewing angle characteristics and a backlight unit using the prism sheet are disclosed. The prism sheet includes: a condensing film which transmits light incident to the condensing film; a plurality of prism crests on the condensing film having apexes; and a plurality of reflection patterns formed on the condensing film such that each of the reflection patterns faces a boundary of adjacent prism crests associated with the reflection pattern to reflect light incident onto the reflection patterns.

Growing community of inventors

Seoul, South Korea

Man Hoan Lee