Lg Chem, Ltd

Eun Ho Kho

Sang Woo Kim

Seunghee Lee

Youngdae Kim

Bu Gon Shin

Jae Jin Kim

Dae Han Seo

Min Soo Song

A holographic waveguide includes a light guide unit configured to guide lights; a first holographic optical element disposed on one surface or the other surface of the light guide unit and configured to diffract an input light; a second holographic optical element disposed on any one of the one surface and the other surface, and configured to receive a light diffracted by the first holographic optical element and to direct a part of the received light to the other one of the one surface and the other surface; a third holographic optical element disposed on a surface, and configured to receive diffracted lights by the second holographic optical element and to guide the lights; and a fourth holographic optical element configured to receive a diffracted light by the third holographic optical element, and to allow the light to be output from the light guide unit.

Holographic light guide plate

Provided is a phthalonitrile-based resin, comprising repeat units formed by the reaction of a phthalonitrile compound and a curing agent, wherein the phthalonitrile compound comprises 4,4′-bis(3,4-dicyanophenoxy)diphenyloxide of the following Chemical Formula 1 and 4,4′-bis(3,4-dicyanophenoxy)biphenyl of the following Chemical Formula 2 at a weight ratio of 30:70 to 90:10:

Phthalonitrile-based resin with improved impact strength

A three-dimensional printing ink that has a viscosity suitable for three-dimensional printing, and improved performance.

Three-dimensional printing ink comprising a phthalonitrile oligomer

A curable resin composition includes a phthalonitrile oligomer, and a prepolymer thereof. According to the present invention, a curable resin composition, which has melt viscosity that can be controlled within a wide range, and thus, can be applied in a larger number of fields.

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Daejeon, South Korea

Eun Ho Kho