• Title/Summary/Keyword: transparent display

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Interaction Between Transparent Dielectric and Bus Electrode for Heating Profile in PDP

  • Lee, Sang-Wook;Kim, Dong-Sun;Park, Mi-Kyung;Hwang, Seong-Jin;Kim, Hyung-Sun
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08a
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    • pp.864-866
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    • 2007
  • In PDP, bus electrode should have low resistance for high efficiency. The transparent dielectric affects the shape change of bus electrode during the firing. These are related with the electrical property of the electrode. In this study, the shape of electrode was controlled by firing schedules of the transparent dielectric and the bus electrode.

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CdSe Quantum Dot based Transparent Light-emitting Device using Silver Nanowire/Ga-doped ZnO Composite Electrode (AgNWs/Ga-doped ZnO 복합전극 적용 CdSe양자점 기반 투명발광소자)

  • Park, Jehong;Kim, Hyojun;Kang, Hyeonwoo;Kim, Jongsu;Jeong, Yongseok
    • Journal of the Semiconductor & Display Technology
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    • v.19 no.4
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    • pp.6-10
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    • 2020
  • The silver nanowires (AgNWs) were synthesized by the conventional polyol process, which revealed 25 ㎛ and 30 nm of average length and diameter, respectively. The synthesized AgNWs were applied to the CdSe/CdZnS quantum dot (QD) based transparent light-emitting device (LED). The device using a randomly networked AgNWs electrode had some problems such as the high threshold voltage (for operating the device) due to the random pores from the networked AgNWs. As a method of improvement, a composite electrode was formed by overlaying the ZnO:Ga on the AgNWs network. The device used the composite electrode revealed a low threshold voltage (4.4 Vth) and high current density compared to the AgNWs only electrode device. The brightness and current density of the device using composite electrode were 55.57 cd/㎡ and 41.54 mA/㎠ at the operating voltage of 12.8 V, respectively, while the brightness and current density of the device using (single) AgNWs only were 1.71 cd/㎡ and 2.05 mA/㎠ at the same operating voltage. The transmittance of the device revealed 65 % in a range of visible light. Besides the reliability of the devices was confirmed that the device using the composite electrode revealed 2 times longer lifetime than that of the AgNWs only electrode device.

Development of Dry Films of Lead-free Transparent Dielectrics for PDP (PDP용 무연 투명유전체의 Dry Film 개발)

  • Lee Ji-Hun;Bang Jae-Cheol
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.6 no.6
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    • pp.497-501
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    • 2005
  • Dry film method was applied to fabricate lead-free transparent dielectric fur PDP(Plasma Display Panel). From various slurry compositions, it was able to find out the. best composition for producing high density green sheet. The slurry exhibited shear thinning characteristics which are known to be suitable fur producing a high quality green sheet. The thermal expansion coefficient of the fabricated transparent dielectric was measured to be $97{\times}10^{-7}/^{\circ}C$ which is close to the value of the glass substrate(PD-200). Cross sectional SEM of the transparent dielectric layer on PD-200 showed that the two layers were well attached each other with no observable gaps between them.

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A Level Shifter Using Aluminum-Doped Zinc Tin Oxide Thin Film Transistors with Negative Threshold Voltages

  • Hwang, Tong-Hun;Yang, Ik-Seok;Kim, Kang-Nam;Cho, Doo-Hee;KoPark, Sang-Hee;Hwang, Chi-Sun;Byun, Chun-Won;Kwon, Oh-Kyong
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.464-465
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    • 2009
  • A new level shifter using n-channel aluminum-doped zinc tin oxide (AZTO) thin film transistors (TFTs) was proposed to integrate driving circuits on qVGA panels for mobile display applications. The circuit used positive feedback loop to overcome limitations of circuits designed with oxide TFTs which is depletion mode n-channel TFTs. The measured results shows that the proposed circuit shifts 10 V input voltage to 20 V output voltage and its power consumption is 0.46 mW when the supply voltage is 20 V and the operating frequency is 10 kHz.

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High-Efficiency Inverted Transparent Blue Organic Light-Emitting Devices

  • Chen, Szu-Yi;Chu, Ta-Ya;Chen, Chao-Jung;Chen, Jenn-Fang;Chen, Chin H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.984-986
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    • 2006
  • We report efficient inverted transparent blue OLEDs (ITOED) with an hole injection layer prepared by co-evaporation of $WO_3$ with NPB, which achieved a total current efficiency of 10.7 cd/A at $20mA/cm^2$ with light emits from both ITO bottom cathode and Au top anode in about 3:1 ratio.

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Flexible top emission organic light emitting diode on paper substrate

  • Lee, Chan-Jae;Moon, Dae-Gyu;Han, Jeong-In;Choi, Sung-Hoon;Oh, Myung-Hwan
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07b
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    • pp.1390-1393
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    • 2005
  • We fabricated an efficient top emission organic light emitting diode (FTEOLED) on paper substrates. For water proof and surface planarization, parylene of 5mm thick has been coated on copy paper substrate by vapor polymerization. As use this coating layer, fabrication of device was possible by photolithography and wet etching. Because paper is not transparent, we adapted top emission structure with transparent cathode and reflective anode. The FTOLED on paper showed the excellent electrical characteristic, $109cd/m^2$, 2.3cd/A at 10V.

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The Study on the Fabrication and Characterization of Dielectric Materials of Front and Back Panel for PDP(Plasma Display Panel)

  • Chang, Myeong-Soo;Lee, Yoon-Kwan;Ryu, Byung-Gil;Park, Myung-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 2000.01a
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    • pp.181-182
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    • 2000
  • The glass compositions of $PbO-SiO_2-B_2O_3$ system and $P_2O_5-PbO-ZnO$ system for the transparent dielectric materials for front panel and $P_2O_5-ZnO-BaO$ and $SiO_2-ZnO-B_2O_3$ for the reflective dielectric materials for back panel of PDP(Plasma Display Panel) were investigated. As a transparent dielectric materials for front panel, $PbO-SiO_2-B_2O_3$ glass showed good dielectric properties, high transparency and proper thermal expansion matching to soda-lime glass substrate. And the reflective dielectric materials for back panel were prepared from parent glass of $SiO_2-ZnO-B_2O_3$ system and oxide filler. It was found that these glass-ceramics are useful materials for reflective dielectric layers, as those have a similar thermal expansion to soda-lime glass plate, high reflectance, low sintering temperature.

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Fabrication of Transparent Dielectric Green Sheet for Plasma Display Panel (PDP 투명유전체 형성용 Green Sheet 제조)

  • Heo, Sung-Cheol;Park, Duck-Kyun;Oh, Young-Jei
    • Journal of the Korean Ceramic Society
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    • v.41 no.4
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    • pp.277-283
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    • 2004
  • To fabricate green sheet of transparent dielectric for PDP front panel, dispersion of transparent dielectric slurry, density, and mechanical properties of green sheets have been investigated as a function of amount and composition of organic additives. Measurements of sedimentation and viscosity were employed to determine a proper dispersant and its amount for a well dispersed transparent dielectric powders in non-aqueous system. Green sheets, having various ratios of transparent dielectric powders to transparent dielectric powders+ binder+plasticizer and binder to binder+plasticizer, were fabricated. All the tape casting slurries showed shear thinning effect, that is, the apparent viscosity decreased with the increase of shear rate. It was found that the amount and composition of organic additives were main variables to affect densities and mechanical properties of transparent dielectric green sheets for PDP.

A Study on Parallax Registration for User Location on the Transparent Display using the Kinect Sensor (키넥트 센서를 활용한 투명 디스플레이에서의 사용자 위치에 대한 시계 정합 연구)

  • Nam, Byeong-Wook;Lee, Kyung-Ho;Lee, Jung-Min;Wu, Yuepeng
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.28 no.6
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    • pp.599-606
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    • 2015
  • International Hydrographic Organization(IHO) adopted standard S-100 as the international standard Geographic Information System(GIS) that can be generally used in the maritime sector. Accordingly, the next-generation system to support navigation information based on GIS standard technology has being developed. AR based navigation information system that supported navigation by overlapping navigation information on the CCTV image has currently being developed. In this study, we considered the application of a transparent display as a method to support efficiently this system. When a transparent display applied, the image distortion caused by using a wide-angle lens for parallax secure, and the disc s, and demonstrated the applicability of the technology by developing a prototype.