• Title/Summary/Keyword: Research center

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The optical design method for dual-mode transflective LCD

  • Hsieh, C.H.;Sha, Y.A.;Su, P.J.;Chang, K.H.;Chen, C.H.;Hsiao, C.C.;Shiu, J.W.;Fuh, S.Y.;Cheng, W.Y.;Liao, Y.C.;Yang, J.C.;Lo, K.L.;Lee, D.W.;Lee, K.C.;Chang, Y.P.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.1529-1532
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    • 2006

  • Depending on the optical design method, a novel dual-mode transflective LCD with proper LC material and optical films was developed. The design increased the optical transmittance and the reflectivity of dual-mode transflective LCDs with the proper parameters of cell gap, alignment layer and optical films. These parameters were evaluated by computer simulation. The simulation results also revealed that the transmissive and reflective states presented similar performance in the transflective LCDs.

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Manufacturing a Single Cell Gap Transflective Liquid Crystal Display by Using Ink Jet Printing Technology

  • Sha, Y.A.;Su, P.J.;Hsieh, C.H.;Chang, K.H.;Chen, C.H.;Hsiao, C.C.;Shiu, J.W.;Fuh, S.Y.;Cheng, W.Y.;Liao, Y.C.;Yang, J-C;Lo, K.L.;Lee, D.W.;Lee, K.C.;Chang, Y.P.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.1533-1536
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    • 2006

  • A novel single cell gap transflective liquid crystal display was developed. By using the ink jet printing technology, we fabricated a transflective liquid crystal display with the hybrid alignment in the reflective region and the homogeneous alignment in the transmission region. Compared with the traditional technologies, our technology provided the advantages of easy process, high yield, fast throughput, and less material usage. We also applied this technology to the 2.4 inch prototype. This panel could be implemented in the handheld product applications.

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Influence of Sustain Pulse-Width on the Electro-Luminous Efficiency in AC-PDPs

  • Cho, T.S.;Kim, T.Y.;Kim, S.S.;Cho, D.S.;Kim, J.G.;Ahn, J.C.;Jung, Y.H.;Lim, J.Y.;Jung, J.M.;Ko, J.J.;Kim, D.I.;Lee, C.W.;Seo, Y.;Cho, G.S.;Choi, E.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2000.01a
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    • pp.115-116
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    • 2000

  • Influence of sustain pulse-width on electro-luminous efficiency is experimentally investigated for surface discharge of AC-PDP. It is found that the firing voltage is decreased as the pulse-width is increased from $2\;{\mu}s$ to $8\;{\mu}s$ with sweeping frequency range of 10 kHz to 50 kHz. It has been found that the optimal sustain pulse-width is in the range of $3{\sim}4\;{\mu}s$ under driving frequency range of 30 kHz and 50 kHz, based on observations of memory coefficient, wall charge, and wall voltage as well as luminous efficiency.

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Cascode Low Noise Amplifiers with Coplanar Waveguide Structure for Wireless LAN Application

  • Kim, Jong-Ho;Kim, Ki-Byoung;Lee, Jong-Chul;Kim, Jong-Heon;Lee, Byungje;Kim, Nam-Young
    • Journal of electromagnetic engineering and science
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    • v.3 no.1
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    • pp.12-16
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    • 2003

  • In this paper, low noise amplifiers with coplanar waveguide structure are presented for Wireless LAN data communication application. For comparison of microwave performance, LNAs of cascode type and balanced type using cascode cell with the same substrate and same bias conditions are designed and implemented. A cascode type of LNA shows the gain of 12.45 ㏈, input return loss of 11.63 ㏈, and noise figure of 1.52㏈. A balanced type of LNA using cascode cell shows the gain of 6.58 ㏈, input return loss of 16.6 ㏈, and noise figure of 1.18 ㏈.

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