Asan, South Korea
Asan, South Korea

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Jin Y.,Hoseo University | Hong Z.,Hoseo University | Hong Z.,NDIS Corporation | Kwon S.-B.,NDIS Corporation
Molecular Crystals and Liquid Crystals | Year: 2015

We developed robust flexible Cholesteric LCDs with polymer walls using polymerization-induced phase separation. It was found out that phase separation temperature in addition to monomer concentration and UV irradiation conditions affected not only the phase separation degree but also the reflective properties. We investigated the reflective properties of the Ch-LC cell with well separated polymer walls, particularly focused on the temperature dependence, resulting in the viewing angle dependence, of reflectance and reflection wavelength bandwidth. The experimental data for the viewing angle dependent reflection wavelength bandwidth were well fitted by a theoretical modeling with a parameter of where Δ(θ) = Δ/cos(θ). © 2015 Taylor & Francis Group, LLC.


Jeon C.-W.,Hoseo University | Hong Z.,Hoseo University | Hong Z.,NDIS Corporation | Park S.-H.,NDIS Corporation | And 2 more authors.
Molecular Crystals and Liquid Crystals | Year: 2015

For 2D-3D conversion, autostereoscopic 3D displays usually adopt an additional LCD panel, which provides parallax barrier, attached on the main display such as TFT-LCD or OLED. Polymer wall type thin film LCD developed for the additional panel has in general grid pattern polymer wall, so that it may induce color moire, which happens by the superposition of the color pixel of the main display and polymer wall. The wall pattern design to reduce the color moire and the experimental verification are presented. Copyright © Taylor & Francis Group, LLC.


Lee B.-Y.,NDIS Corporation | Park S.-K.,NDIS Corporation | Cho H.-S.,NDIS Corporation | Kim K.-N.,NDIS Corporation | And 2 more authors.
48th Annual SID Symposium, Seminar, and Exhibition 2010, Display Week 2010 | Year: 2010

Here we report a method to achieve a full color cholesteric liquid crystal using single liquid crystal layer and single plastic substrate. Mixture of a photo-sensitive chiral dopant and a nematic host was encapsulated and coated onto a surface. By irradiating UV with different energy into each sub-pixel zone, separate RGB sub-pixel could be obtained. The fabricated flexible prototype showed vivid and bright color as well as a great robustness.


Patent
Samsung and NDIS Corporation | Date: 2015-03-30

A refrigerator includes a body including a storage chamber; a door that is coupled to the body so as to open/close the storage chamber; a display that is disposed in at least one region of the door and is configured to be converted between a transparent mode and a display mode; and a controller that controls the display to display at least one among a text, an image, and color when the display is in the display mode.


Patent
Samsung and NDIS Corporation | Date: 2015-10-07

A refrigerator includes a body including a storage chamber; a door (103) that is coupled to the body so as to open/close the storage chamber; a display (110) that is disposed in at least one region of the door (103) and is configured to be converted between a transparent mode and a display mode; and a controller (120) that controls the display (110) to display at least one among a text, an image, and color when the display is in the display mode.


Lee J.-H.,Pusan National University | Lee B.-Y.,NDIS Corporation
Applied Physics Letters | Year: 2011

The bistable memory of a cholesteric liquid crystal often disappears owing to the unstable orientation of the focal conic state. We demonstrated the stabilization of the memory by controlling the boundary symmetry of a mono-layered cholesteric liquid crystal capsules which were fabricated with a membrane filter. It was found that the focal conic memory state with a random orientation of the helical axes became more stable in the capsules with higher boundary symmetry. With the same principle, the planar memory state with a lower symmetric orientation of the helical axes became more stable in the capsules with lower symmetry. © 2011 American Institute of Physics.


Lee B.-Y.,NDIS Corporation | Lee J.-H.,Pusan National University
Current Applied Physics | Year: 2011

We report a method for fabricating a cholesteric liquid crystal capsule display wherein the red, green, and blue capsules are separated in the subpixels with a width of 200 μm. The mixture of a photo-isomerizable chiral dopant and a nematic liquid crystal was encapsulated by an emulsification technique, and then directly printed onto a plastic substrate. A UV light with different amount of energy was exposed through a shadow photomask, and consequently, the red, green, and blue colors were separately induced in each subpixels zone. © 2011 Elsevier B.V. All rights reserved.


Patent
Ndis Corporation | Date: 2010-11-16

A method for manufacturing a liquid crystal display device including first, second, and third pixels for displaying different colors comprises the steps of: forming a first electrode on a substrate; forming a liquid crystal layer including a cholesteric liquid crystal as a mixed material of a non-polymeric liquid crystal compound and a photosensitive chiral additive; irradiating a different intensity of light on the liquid crystal layer positioned on the first pixel, the liquid crystal layer positioned on the second pixel, and the liquid crystal layer positioned on the third pixel; and forming a second electrode facing the first electrode.


Disclosed is a liquid crystal mixture that includes an isotropic mixture of liquid crystal molecules and a photo-polymerizable monomer. In addition, disclosed are a liquid crystal display (LCD) including a first display panel and a second display panel facing each other, and a liquid crystal layer disposed between the first display panel and the second display panel and including a plurality of liquid crystal regions and a plurality of polymer structures positioned among the plurality of liquid crystal regions, and a method of manufacturing the liquid crystal display (LCD). The liquid crystal layer is formed of a liquid crystal mixture in which liquid crystal molecules and a photo-polymerizable monomer exist isotropically.


A system for controlling brightness flicker of a parallax barrier LCD having a wide viewing angle capable of minimizing brightness flicker by adjusting a permittivity curve depending on different times into a predetermined waveform when split barriers are on/off by movement of a viewers viewing angle, and a method thereof. A method of controlling brightness flicker of a parallax barrier LCD having a wide viewing angle for controlling brightness of a display providing a stereoscopic image by acquiring a real-time image of a viewer, recognizing an image of the viewer and extracting locations and coordinates of eyes of the viewer, and controlling turn-on/off of split barrier electrodes.

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