Electronics and Telecommunications Research Institute

Korea Telecommunication Authority

Unitex Co., Ltd

Seung Koo Park

Suntak Park

Jung Jin Ju

Jeong Ik Lee

Jaehyun Moon

Jun-Han Han

Chul Woong Joo

Doo-Hee Cho

Myung Hyun Lee

Bong Je Park

Nam Sung Cho

Jin Wook Shin

Jin Huh

Sung Ryul Yun

Joo Hyun Hwang

Min-su Kim

Hye Yong Chu

Jung Yun Do

Jin Tae Kim

Sun Tak Park

Ki Uk Kyung

Seongcheol Mun

Myung-Hyun Lee

Byoung Gon Yu

Min Su Kim

Joon Tae Ahn

Eun Jin Shin

Joong-Seon Choe

Sae Kwang Nam

Jong-Moo Lee

Mi Jeong Choi

Jonghee Lee

Ki-Uk Kyung

Jong Tae Lim

Jeong Mook Lim

Inwook Hwang

Jeong Muk Lim

Jae Woong Yoon

Saekwang Nam

Chi-Sun Hwang

Chan Woo Park

Jae Bon Koo

Yong Hae Kim

Sang Seok Lee

Kyung Soo Suh

Sang Hoon Cheon

Myung Lae Lee

Hojun Ryu

Seongdeok Ahn

Hyong Sik Won

Hyunsu Cho

Seok Ho Song

JaeWoong Yoon

Sungryul Yun

Myung Gi Lee

Boong Joon Lee

Bong Joon Lee

Min-Su Kim

Mee Jeong Choi

Yoo Hong Min

Bong K Kang

Hyoung J Yoo

Provided are a composition for a light transmittance control film, and a light transmittance control film. According to the inventive concept, the light transmittance control film includes a matrix part including a copolymer and a polymer chain which is grafted to the copolymer, and a dispersed part including a polymer derived from a first monomer, and are provided in the matrix part, wherein the polymer chain is derived from the first monomer, first light transmittance is shown while external force is applied, and second light transmittance which is greater than the first light transmittance may be shown after the external force is removed.

Light transmittance control film and composition for the light transmittance control film

Provided is a stereoscopic surface display device including a stereoscopic display unit having a cell area, wherein the stereoscopic display unit includes a first flexible layer, a first optical waveguide and a first optical output unit in the first flexible layer, wherein the first optical output unit are disposed in the cell area, a first light source disposed on a side of the stereoscopic display unit, wherein the first optical waveguide connects the first light source and the first optical output unit, a first photothermal response layer on the first flexible layer, wherein the first photothermal response layer is configured to receive output light emitted from the first optical output unit and emit thermal energy, and a shape deformation layer on the first photothermal response layer, wherein the shape deformation layer is configured to generate bending deformation by receiving the thermal energy from the first photothermal response layer.

Stereoscopic surface display device and operation method of the same

An embodiment of the inventive concept provides a method of manufacturing a polymer film, the method including: preparing a first copolymer containing a first functional group; preparing a second copolymer containing a second functional group; preparing a first compound containing a third functional group; and performing a cross-linking reaction by mixing the first copolymer, the second copolymer, and the first compound, wherein the cross-linking reaction includes a reaction of the first functional group and the second functional group and a reaction of the second functional group and the third functional group, the first compound includes a polar group and any one group selected from among a vinyl group, an aryl group, and an acrylate group, and the third functional group has reactivity with respect to the second functional group, but does not have reactivity with respect to the first functional group.

Method of manufacturing polymer film and polymer film composition

The present invention relates to a shape-variable electronic device and an operation method of the same and, more specifically, the shape-variable electronic device includes: a substrate having a cell region; a light source unit on the cell region; and a flexible layer vertically spaced apart from the light source unit. The flexible layer includes an actuator part that changes a shape of the flexible layer, and the actuator part includes: a photo-thermal response part that receives light emitted from the light source unit and generates thermal energy; a deformation part which receives the thermal energy from the photo-thermal response part and of which mechanical stiffness is reduced; and a top electrode and a bottom electrode on both surfaces of the deformation part, respectively.

Shape-variable electronic device and operation method of the same

Provided is focal variable device system including a focus variable element including an absorbing layer, and an adjustable light source configured to cause an adjustable light to enter the focus variable element. The absorbing layer includes a thermal expansion material that absorbs the adjustable light and thermally expands.

Focal variable device system

Provided are a composition for a light transmittance control film, and a light transmittance control film. According to the inventive concept, the light transmittance control film includes a matrix part including a copolymer and a polymer chain which is grafted to the copolymer; and a dispersed part including a polymer derived from a first monomer, and are provided in the matrix part, wherein the polymer chain is derived from the first monomer, first light transmittance is shown while external force is applied, and second light transmittance which is greater than the first light transmittance may be shown after the external force is removed.

A reflective active variable lens includes an upper electrode, a lower electrode disposed in parallel to the upper electrode, a deformation part disposed between the upper electrode and the lower electrode, a reflective part disposed on the upper electrode, and a support part disposed to surround the deformation part. Here, the deformation part and the support part are connected to each other to provide a single structure, the deformation part is expanded from an initial shape when an electric field is formed between the upper electrode and the lower electrode, and the expanded deformation part is contracted when the electric field is removed and restored to the initial shape.

Reflective active variable lens and method of fabricating the same

A composition for forming film having wrinkle structure and a method of forming the film are disclosed. The composition includes photo-curable agent and photoinitiator dissolved in the photo-curable agent. The cut off wavelength of light transmittance of the photo-curable agent is greater than the cut off wavelength of light absorbance of the photoinitiator. Photo-cured thin film is formed at the upper portion of composition layer at an initial time period of irradiation. By subsequent contraction, the photo-cured thin film forms wrinkles. The wrinkle structure is controlled by the relation of the cut off wavelength of light transmittance of the photo-curable agent and the cut off wavelength of light absorbance of the photoinitiator, the photo-curing rate of the composition and the thickness of the composition layer, and the photoinitiator concentration, etc., before photo-curing. The film may increase the emission efficiency of LED and OLED and the sensing effect of sensor.

Composition for forming film having wrinkle structure and method of forming the film

Disclosed is a varifocal lens module. A varifocal lens module according to an embodiment includes a lens formed of a flexible and transparent material and having a focal length varying according to a variable shape thereof; at least one driving part expanded or contracted in response to an electric signal; and at least one structural body configured to physically or chemically connect the lens and each driving part.

Varifocal lens module

Provided is a stretchable substrate, an electronic apparatus, and a method of manufacturing the electronic apparatus. The stretchable substrate includes a base part, first parts extruded from the base part, and second parts disposed between two adjacent first parts. The second parts have top surfaces positioned lower than the top surfaces of the first parts, and have wrinkles with random distribution.

Stretchable substrate, electronic apparatus having the stretchable substrate, and method of manufacturing the electronic apparatus

There is provided an optical imaging device including a flexible image sensor and an actuator that expands or contracts the flexible image sensor on a two-dimensional plane. It is possible to minimize distortion aberration and control a viewing angle and magnification.

Optical imaging device

There are provided an image processing apparatus and a control method thereof. An image processing apparatus includes an image sensor for acquiring a target image, an image processing module for performing focusing on a specific area of the acquired target image and determining a focal surface of the target image on the basis of the performed focusing, and a drive control module for controlling the curvature of the image sensor, based on the determined focal surface.

Image processing apparatus and control method thereof

Disclosed is a blend prepared by mixing a prepolymer and a vinyl monomer, wherein the prepolymer is prepared by a condensation reaction between a first compound represented by the formula Ar&#x2014;H, where Ar comprises (a) a crosslinkable moiety at one end, (b) a moiety selected from the group consisting of &#x2014;O&#x2014;, &#x2014;S&#x2014;, &#x2014;COO&#x2014;, &#x2014;CO&#x2014;, &#x2014;COS&#x2014;, &#x2014;SO&#x2014;, and &#x2014;NH&#x2014;, and (c) one or two repeating units selected from the group consisting of: where A is carbon or nitrogen, and X is hydrogen or halogen; and a second compound consisting of an aromatic moiety. Additionally disclosed is a polymer sheet that is a crosslinked product composed of the blend.

Blend prepared by mixing a prepolymer and a vinyl monomer and a polymer sheet obtained therefrom

Provided is a method of fabricating a light functional substrate. The method includes applying particles onto a surface of water contained in a container to form a monolayer constituted by the particles, immersing a substrate into the container, drawing the substrate out of the container to form patterns constituted by the particles on the substrate in a first direction, and forming a planarization film covering the patterns on the substrate.

Method of fabricating light functional substrate and organic light emitting diode having the same

Provided is a method of forming a film having a surface structure of a random wrinkles. A compound according to the present invention is coated and then, a film having a surface structure of random wrinkles may be simply formed through simple ultraviolet (UV) curing or thermosetting. When the film thus formed is used in an organic light emitting device, light generated from the organic light emitting device is scattered on surfaces of the random wrinkles to prevent light guide or total reflection, and thus, light is extracted to the outside. That is, a random structure disposed at the outside of the device performs a light extraction function and consequently, light efficiency of the organic light emitting device may be increased.

Method of forming a film having a surface structure of random wrinkles

Growing community of inventors

Daejeon, South Korea

Seung Koo Park