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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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    • 한국정보디스플레이학회 2000년도 제1회 학술대회 논문집
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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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Development of 40 inch Full Color AMOLED Display

  • Chung, K.;Huh, J.M.;Sung, U.C.;Chai, C.C.;Lee, J.H.;Kim, H.;Lee, S.P.;Goh, J.C.;Park, S.K.;Ko, C.S.;Koh, B.S.;Shin, K.J.;Choi, J.H.;Jung, J.H.;Kim, N.D.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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    • pp.781-784
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    • 2005

  • We have developed technology to fabricate large-size active matrix organic light-emitting diode (AMOLED) displays with good color purity. Using these innovations, we have developed a 40inch diagonal WXGA AMOLED full color display. Because the TFT circuitry occupies a large portion of the pixel structure, an efficient white emission OLED is essential to integrate the device onto the active matrix backplane. The development of these technologies enables OLED displays to fulfill the requirements for larger size applications such as HDTVs

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New Harmonic Suppressed Microstirp Ring Bandpass Filters

  • Park, Hyun-Joo;Kim, Jae-Hyuk;Park, Ji-Yong;Lee, Jong-Chu;Kim, Jong-Heon;Lee, Byung-Je;Kim, Nam-Young
    • 한국전자파학회논문지
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    • 제11권5호
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    • pp.697-706
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    • 2000

  • In this paper, new bandpass filters that are composed of microstrip ring resonators with the center frequency of 5.775 GHz and the bandwidth of 100 MHz are presented. For the suppression of the unnecessary harmonics, lowpass filters are inserted into the feedlines and ring resonator itself, respectively These bandpass filters show good microwave characteristics with the harmonic suppression ratio of about 39 dB and 35 dB, respectively. Also, the varactor-tuned microstip ring bandpass filter with harmonic suppression is suggested and the tuning bandwidth of more than 450 MHz is obtained.

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Field Emission-Back Light Unit Fabricated Using Carbon Nanotube Emitter

  • Kim, H.S.;Lee, J.W.;Lee, S.K.;Lee, C.S.;Jung, K.W.;Lim, J.H.;Moon, J.W.;Hwang, M.I.;Kim, I.H.;Kim, Y.H.;Lee, B.G.;Choi, Y.C.;Seon, H.R.;Lee, S.J.;Park, J.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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    • pp.277-280
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    • 2007

  • Field emission-back light unit (FE-BLU) was fabricated using carbon nanotube (CNT) emitter. Local dimming and local brightening techniques were achieved, which results in very high contrast ratio. In addition, the motion blur phenomenon, one of the serious problems of liquid crystal display (LCD) with cold cathode fluorescent lamp (CCFL)-BLU, was removed from LCD-TV by using FE-BLU.

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