Lg Chem, Ltd

Moon-Soo Park

Hyuk Yoon

Byoung-Kun Jeon

Sin-Young Kim

Dae-Hee Lee

Belyaev Sergey

Du-Hyun Shin

Je-Hyuk Yoo

Chang-Hun Yun

Bu Gon Shin

Sergey Belyaev

Eun-Kyung Kim

Sang-Choll Han

Jun-Won Chang

Sang-Jun Yoon

Seung-hun Chae

Su-Young Ryu

Sin-young Kim

Dae Hee Lee

Kyun Il Rah

Sung-Hyun Nam

Bu-Gon Shin

In-Cheon Han

Hyun-Ju Cho

Jnn-Won Chang

Hyoung-Gu Kang

A polarizer for use in an IPS-LCD includes: a polarizing element; and a retardation film laminate attached to a surface of the polarizing element. The retardation film laminate includes a combination of a +B film and a &#x2212;B film or a combination of a +B film and a +A film.

Polarising plate for a planar-switch mode LCD, and a planar-switch mode LCD comprising the same

Disclosed is a homeotropic alignment liquid crystal film without an alignment layer and a method for preparing the same. More specifically, the present invention relates to a homeotropic alignment liquid crystal film without using a separate alignment layer to induce a homeotropic alignment of the liquid crystal in which a liquid crystal layer has a homeotropic alignment property by coating a polymerizable and reactive liquid crystalline mixture solution including a predetermined surfactant on a plastic substrate whose surface are hydrophilic-treated, and drying and UV irradiating the mixture solution; a method for preparing the same. The homeotropic alignment liquid crystal film prepared according to the present invention may be very useful as a major component of a viewing-angle compensation film and a retardation film, etc. in LCD, and has advantages of simplicity of the manufacturing process, its shortened manufacturing time, its mass production, etc.

Homeotropic alignment liquid crystal film without alignment layer and method for preparing the same

An optical filter for stereoscopic image display device and a stereoscopic image display device may be provided. In one embodiment, the optical filter for stereoscopic image display device may include a plastic substrate; an alignment layer; and a retardation layer, and the stereoscopic image display device may include the optical filter.

Optical filter

Provided are a circular polarizer and a reflective liquid crystal display including the same. The circular polarizer includes a polarizer comprising a polarizing film in which an absorption axis has an angle of about 85&#xb0; to about 95&#xb0; with respect to a liquid crystal alignment direction of a liquid crystal cell, where, in CIE coordinates, a color 'a' is about &#x2212;1 to about &#x2212;0.6 and a color 'b' is about 0.3 to about 2.5 and a &#xbc; wavelength plate in which an optical axis has an angle of about 130&#xb0; to about 140&#xb0; with respect to the liquid crystal alignment direction of the light crystal cell. When the circular polarizer is used, the visibility and color tone of the reflective liquid crystal display may be improved.

Circular polarising plate and a reflective liquid-crystal display device comprising the same

There is provided a polarizer for organic light emitting diodes (OLED) having improved brightness. The polarizer, which comprises a linear polarizer and a &#xbc; retardation plate, comprises a reflective polarizer film disposed between the linear polarizer and the &#xbc; retardation plate and transmitting a polarized light horizontal to the transmission axis of the linear polarizer while reflecting a polarized light vertical to the transmission axis of the linear polarizer. The polarizer may be useful to highly improve the brightness of the OLED device when the polarizer is used in the OLED device.

Luminance-enhancing polarising plate for an organic light-emitting element

There is provided an electrically controllable birefringence liquid crystal display (ECB-LCD) device, including: a liquid crystal panel including a first substrate, a second substrate, and a liquid crystal cell interposed between the first substrate and the second substrate and including a liquid crystal having positive dielectric anisotropy, the liquid crystal cell having a cell gap of 1 to 5 &#x3bc;m and operating in an ECB mode; a first polarizer disposed on an upper portion of the first substrate and having a first absorption axis; a second polarizer disposed on a lower portion of the second substrate and having a second absorption axis; a first liquid crystal film interposed between the first substrate and the first polarizer; and a second liquid crystal film interposed between the second substrate and the second polarizer; wherein the first liquid crystal film includes a first base substrate; and a first liquid crystal layer formed on a surface of the first base substrate and including a nematic liquid crystal splay-aligned such that a maximum tilt angle is 20&#xb0; to 90&#xb0; from an in-plane direction to a thickness direction; and wherein the second liquid crystal film includes a second base substrate; and a second liquid crystal layer formed on a surface of the second base substrate and including a horizontally aligned nematic liquid crystal.

ECB-LCD having an excellent viewing angle and color characteristics

A composition for a liquid crystal film includes: 100 parts by weight of a vertically aligned liquid crystal mixture; 0.001-20 parts by weight of a chiral dopant; and 50-900 parts by weight of a solvent.

Composition for liquid crystal film, liquid crystal film using composition, and method of manufacturing liquid crystal film

The present invention relates to a composition for liquid crystal alignment layer, a preparation method of liquid crystal alignment layer using the same, and an optical film comprising the liquid crystal alignment layer. More particularly, the composition for liquid crystal alignment layer according to the present invention includes crosslinkable functional monomers as well as a photoreactive polymer, thereby improving thermal stability and durability of the liquid crystal alignment layer that is prepared by using the composition for liquid crystal alignment layer. In addition, when the liquid crystal alignment layer is used to produce an optical film, adhesive strength between substrate and liquid crystal alignment layer and between liquid crystal alignment layer and liquid crystal film can be improved.

Composition for liquid crystal alignment layer, preparation method of liquid crystal alignment layer using the same, and optical film comprising the liquid crystal alignment layer

A patterned retardation film includes: a substrate; a first alignment film and a second alignment film disposed on the substrate, processed by different alignment processes and having different alignment directions; and a liquid crystal layer disposed on the first alignment film and the second alignment film, wherein the liquid crystal layer is patterned into a first region, which is aligned by the first alignment film, and a second region, which is aligned by the second alignment film.

Patterned retardation film and method for manufacturing the same

There are provided an optical compensation film including an alignment film whose adhesiveness to a substrate and a liquid crystal layer and alignment property are excellent when a novel substrate is used to solve the problem regarding deteriorated durability being caused when a retardation film including a liquid crystal film is used under a hot and humid environment, and an integrated polarizing plate comprising the same. The O-plate includes a substrate; an alignment film prepared by coating the substrate with a composition for an alignment film that is composed of polyvinyl alcohol, a multifunctional acrylate monomer, a compatibilizing agent, a photo initiator and a solvent, followed by undergoing drying, curing and rubbing processes; and a splay-aligned liquid crystal film formed on the alignment film.

O-plate having excellent durability and itegrated polarizing plate comprising the same

Disclosed herein is a method for manufacturing a very thin achromatic quarter wave film laminate for transflective LCD including steps of (1) preparing a polymeric substrate oriented in a specific direction; (2) coating a liquid crystal solution on the polymeric substrate; (3) subjecting the coating to drying and UV curing to form a lower liquid crystal layer; (4) coating a solution for an orientation film on the lower liquid crystal layer; (5) drying the coating to form an orientation film; (6) imparting orientation to the orientation film via polarization UV radiation or rubbing; (7) coating a liquid crystal solution on the orientation film; and (8) subjecting the coating to drying and UV curing to form a upper liquid crystal layer. The very thin achromatic quarter wave film laminate for transflective LCD manufactured by this method has a considerably reduced thickness, as compared to conventional quarter wave films in which anisotropic polymeric films are laminated.

Very thin achromatic quarter wave film laminate for transflective LCD and method for producing the same

There is provided a polarizer integrally containing view angle compensating film used in an in-plane switching liquid crystal display (IPS-LCD) filled with liquid crystal (&#x394;&#x2208;&#x3e;0) having positive dielectric anisotropy and an in-plane switching liquid crystal display comprising the same. More particularly, there is provided an integrated polarizer capable of being used to manufacture a thin polarizer and securing a good view angle by employing a view angle compensating film as a protective film of a polarizing film forming the polarizer and an IPS-LCD comprising the same. The integrated polarizer comprises a polarizing film; a protective film attached to one surface of the polarizing film; and a +A plate coated with a +C plate attached to the other surface of the polarizing film. The +C plate is coated in the form of liquid crystals.

Polarizing plate with built-in viewing angle compensation film and IPS-LCD comprising same

Disclosed herein are an integrated O film for improving a viewing angle of a TN-LCD, and a polarizer plate and TN-LCD including the same. Also disclosed herein are a compensation film which is capable of improving a contrast characteristic at a front side and an inclination angle and minimizing a color variation according to a viewing angle in a dark state, and a polarizer plate and TN-LCD including the same. The integrated O film includes a transversely-stretched negative biaxial (B) film and a positive O film laminated on the transversely-stretched negative B film.

Growing community of inventors

Daejeon, South Korea

Moon-Soo Park