• 한국정보디스플레이학회:학술대회논문집
• /
• 2009.10a
• /
• pp.877-878
• /
• 2009

To realize the flexible audible display (FAD), polymer dispersed liquid crystal(PDLC) is deposited on PVDF(Poly-vinylidene fluoride) film with piezoelectric property. With applied audio signal, it makes sound more than 70 dB in 700 Hz-10kHz. In case of transparency it is opaque and transmittance is less than 10% at 550nm wavelength without bias voltage. It is turned to be transparent and show transmittance of 66% with driving voltage of 60V.

• Journal of Information Display
• /
• v.7 no.1
• /
• pp.7-11
• /
• 2006

In this paper, we report the fabrication of high quality polymer walls by using a monomer containing fluorine (F-monomer). Polymer walls with no phase retardation were fabricated by using photo-polymerization induced anisotropic phase separation of the mixture composed of liquid crystal (LC) and F-monomer. Thanks to the immiscibility of fluoride, we could form high quality polymer walls with no light leakage. We measured electro-optic characteristics of a twisted-nematic (TN) LC cell whose polymer walls were fabricated by using the F-monomer, and the measurements were compared with that fabricated by using the monomer without fluorine.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2007.08a
• /
• pp.203-206
• /
• 2007

The FLEXMatters initiative is building a collaboration of companies and universities to develop and produce flexible devices. Kent Displays leads the production of flexible displays using their bistable cholesteric technology. The FLEXMatters members are collaborating to develop the flexible manufacturing process that will are common to a wide variety of devices.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2004.08a
• /
• pp.1249-1250
• /
• 2004

In this paper, we report new technique of preparation of material for flexible displays and E-paper technology. This material represents porous polymeric fiber based on polyacrylonitrile filled by liquid crystal.

• Journal of Information Display
• /
• v.6 no.1
• /
• pp.1-7
• /
• 2005

We propose new fabrication methods of a pixel-isolated liquid crystal (LC) structure for flexible display applications. In the LC structure fabricated through the proposed method, the patterned interpixel walls for sustaining the cell thickness are supported by the solidified polymer layer through anisotropic phase separation of LC/polymer composite, causing the alignment of the LC molecules to have very good mechanical stability against external pressure. In addition, we show that such pixel-isolating walls can be made by the stamping method which can be applied to fabricate large size plastic LCDs by roll-to-roll processing.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2005.07a
• /
• pp.502-505
• /
• 2005

The modeling for the cell gap process characteristic on the flexible liquid crystal display (LCD) process was investigated by response surface methodology (RSM). D-optimal design is carried out to build the design matrix. The analysis of variance (ANOVA) technique was used to analyze the significance level. The statistical analysis was used to verify the response surface model. The desirability function was used in the design-space optimization.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2009.10a
• /
• pp.1112-1114
• /
• 2009

In this paper, we have studied manufacturing process for liquid crystal displays (LCDs) using plastic substrates. Because the thermal and dimensional stabilities of plastic substrates are decisive issues, both the process and materials were improved to fit the manufacturing requirements of flexible twisted-nematic (TN) and color super-twisted nematic (CSTN) LCDs. Finally, to broaden the flexible display applications, we take advantage of the unique properties of flexible display to design several innovative products.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2007.08a
• /
• pp.733-736
• /
• 2007

We have proposed novel bonding technique of substrates for developing the flexible LCD with high quality. The gel type mixture of agarose and UV curable epoxy developed to obtain tight bonding ability and enhanced electro-optical characteristic simultaneously. This technique can be used to roll-to-roll process for fabricating the flexible LCDs.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2005.07a
• /
• pp.364-367
• /
• 2005

We developed a method for adhesion of two substrates with stable liquid crystal (LC) structures using patterned microstructure and LC/polymer composite materials. In the device, the LC molecules are isolated in pixels where LCs are surrounded by patterned microstructures, and two substrates are tightly attached each other by the solidified polymer produced by anisotropic phase separation by UV exposure. These devices show very good mechanical stability against external pressure.

• Journal of Information Display
• /
• v.12 no.4
• /
• pp.195-198
• /
• 2011

Proposed herein is a flexible bistable chiral splay nematic display mode with an enhanced memory retention time under external distortion. By adopting the polymerized reactive-mesogen structure mixed in a liquid crystal layer, local anchoring energy is generated on the boundary between the polymer structures, and the relaxation from the ${\pi}$-twisted state to the initial splay state could be interrupted. As a result, the memory retention time becomes significantly longer, and the stability against the external distortion is enhanced.