• Title/Summary/Keyword: microdisplay

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A Study of Diffraction Effect on LCOS Microdisplay

  • Liu, Weimin;Liu, Joe;Liu, Vincent;Chiang, Wei Chen;Cheng, Hui Lun
    • 한국정보디스플레이학회:학술대회논문집
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    • 2004.08a
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    • pp.373-376
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    • 2004
  • The measurement of diffraction of LCOS microdisplay with various pixel size, interpixel gap, pixel height and coatings demonstrates that pixel size is the leading factor for diffraction loss, while the role of varying pixel gap is less significant comparatively. One-dimensional diffraction simulation is found to be in good agreement with the measurement. Noticeable deviation occurs when pixel size is as small as 8um.

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Development of controller for 0.24" QVGA transmissive type microdisplay panel (0.24" QVGA급 transmissive type microdisplay 패널용 컨트롤러 회로 개발)

  • Youn, Dong-Jun;Lee, Eun-Ha;Kim, Hye-Kyung;Shim, Hun;Moon, Hyun-Chan
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.04a
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    • pp.173-176
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    • 2003
  • Microdisplay with transmissive to realize the virtual display con make the large screen with small devices, so virtual image realization technology have been developed by using 0.24" microdisplay panel. We developed microdisplay controller with using Kopin panel. microdisplay will be used in several telecommunication terminal which can transfor text message and still/moving images.

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Recent Advances In Small Molecule OLED Microdisplays

  • Ghosh, Amalkumar P.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08a
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    • pp.235-238
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    • 2007
  • eMagin's unique OLED-on-silicon microdisplay technology is unique and is based on small molecule white OLED with color filters using a top emitter structure. This paper will present results of recent improvements in the technology including improved lifetimes and uniformity and will feature an SVGA resolution full color microdisplay that is 0.44 inches diagonal.

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Optimization of optical design for Eye Glass Display using hybrid aspheric lens (Hybrid 비구면 렌즈를 이용한 Eye glass Display용 광학시스템의 최적화)

  • Kim, T.H.;Park, K.B.;Park, Y.S.;Kim, H.W.;Seok, J.M.;Moon, H.C.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2005.05a
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    • pp.123-126
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    • 2005
  • Eye Glass Display (EGD) with microdisplay to realize the virtual display can make the large screen, so virtual image has been developed by using microdisplay panel. This paper shows study of low cost lens design and simulation for microdisplay system with 0.6"LCoS panel. Lens design optimized consider to spherical aberration, astigmatism, distortion, and chromatic aberration. Code V is used and it designed an aspheric lens about exit pupil 6mm, eye relief 20mm and 35 degree of field of view (FOV). With the application this aspheric lens to liquid crystal on silicon (LCOS) type's microdisplay, virtual image showed 50 inch at 2m. One side of the aspheric lens was constituted from diffractive optical element (DOE) for the improvement in a performance. It had less than 2.5% of distortion value and modulation transfer function in axial had 20% of resolution with 32 lp/mm spatial frequency. The optical system is suitable for display of 15.6 mm-diagonal with SVGA.

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Optimization of optical design for Eye Glass Display

  • Moon, H.C.;Kim, T.H.;Park, K.B.;Park, Y.S.;Seok, J.M.;Kim, H.W.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07b
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    • pp.1603-1606
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    • 2005
  • Eye Glass Display (EGD) with microdisplay to realize the virtual display can make the large screen, so virtual image has been developed by using microdisplay panel. This paper shows study of low cost lens design and simulation for microdisplay system with 0.6" Liquid Crystal on Silicon (LCoS) panel. Lens design optimized consider to spherical aberration, astigmatism, distortion, and chromatic aberration. Code V is used and it designed an aspheric lens about exit pupil 6mm, eye relief 20mm and 35 degree of field of view (FOV). With the application this aspheric lens to LCOS type's microdisplay, virtual image showed 50 inch at 2m. One side of the aspheric lens was constituted from diffractive optical element (DOE) for the improvement in a performance. It had less than ${\pm}2%$ of distortion value and modulation transfer function in axial had 20% of resolution with 30 lp/mm spatial frequency. The optical system is suitable for display of 0.6"-diagonal with SVGA.

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Silicon-based 0.69-inch AMOEL Microdisplay with Integrated Driver Circuits

  • Na, Young-Sun;Kwon, Oh-Kyong
    • Journal of Information Display
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    • v.3 no.3
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    • pp.35-43
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    • 2002
  • Silicon-based 0.69-inch AMOEL microdisplay with integrated driver and timing controller circuits for microdisplay applications has been developed using 0.35 ${\mu}m$ l-poly 4-metal standard CMOS process with 5 V CMOS devices and CMP (Chemical Mechanical Polishing) technology. To reduce the large data programming time consumed in a conventional current programming pixel circuit technique and to achieve uniform display, de-amplifying current mirror pixel circuit and the current-mode data driver circuit with threshold roltage compensation are proposed. The proposed current-mode data driver circuit is inherently immune to the ground-bouncing effect. The Monte-Carlo simulation results show that the proposed current-mode data driver circuit has channel-to-channel non-uniformity of less than ${\pm}$0.6 LSB under ${\pm}$70 mV threshold voltage variaions for both NMOS and PMOS transistors, which gives very good display uniformity.

Lens Design For Microdisplay System With Multi-Mirrors (마이크로디스플레이시스템에서의 멀티미러를 갖는 렌즈 설계)

  • 김혜경;윤동준;신승연;송문빈;김성호;박광범;최성호;문현찬
    • Proceedings of the Optical Society of Korea Conference
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    • 2002.11a
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    • pp.100-101
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    • 2002
  • This paper show lens design and simulation for microdisplay system with two mirror, Lens design optimized consider to spherical aberration, astigmatism, distortion, and chromatic aberration.

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Design of white tandem organic light-emitting diodes for full-color microdisplay with high current efficiency and high color gamut

  • Cho, Hyunsu;Joo, Chul Woong;Choi, Sukyung;Kang, Chan-mo;Kim, Gi Heon;Shin, Jin-Wook;Kwon, Byoung-Hwa;Lee, Hyunkoo;Byun, Chun-Won;Cho, Nam Sung
    • ETRI Journal
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    • v.43 no.6
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    • pp.1093-1102
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    • 2021
  • Microdisplays based on organic light-emitting diodes (OLEDs) have a small form factor, and this can be a great advantage when applied to augmented reality and virtual reality devices. In addition, a high-resolution microdisplay of 3000 ppi or more can be achieved when applying a white OLED structure and a color filter. However, low luminance is the weakness of an OLED-based microdisplay as compared with other microdisplay technologies. By applying a tandem structure consisting of two separate emission layers, the efficiency of the OLED device is increased, and higher luminance can be achieved. The efficiency and white spectrum of the OLED device are affected by the position of the emitting layer in the tandem structure and calculated via optical simulation. Each white OLED device with optimized efficiency is fabricated according to the position of the emitting layer, and red, green, and blue spectrum and efficiency are confirmed after passing through color filters. The optimized white OLED device with color filters reaches 97.8% of the National Television Standards Committee standard.

Aspects of a head-mounted eye-tracker based on a bidirectional OLED microdisplay

  • Baumgarten, Judith;Schuchert, Tobias;Voth, Sascha;Wartenberg, Philipp;Richter, Bernd;Vogel, Uwe
    • Journal of Information Display
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    • v.13 no.2
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    • pp.67-71
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    • 2012
  • In today's mobile world, small and lightweight information systems are becoming increasingly important. Microdisplays are the base for several near-to-eye display devices. The addition of an integrated image sensor significantly boosts the range of applications. This paper describes the base-building block for these systems: the bidirectional organic light-emitting diode microdisplay. A small and lightweight optic design, an eye-tracking algorithm, and interaction concepts are also presented.

A Study of CMOS Image Sensor on Microdisplay System (Microdisplay 시스템에서 CMOS 이미지 센서의 적용에 대한 연구)

  • Song, Moon-Bin;Moon, Hyun-Chan;Kim, Peter;Kim, Hye-Kyung;Youn, Dong-Jun;Choi, Seong-Ho;Park, Kwang-Bum
    • Proceedings of the KIEE Conference
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    • 2002.07d
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    • pp.2677-2680
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    • 2002
  • 각종 시스템 및 시스템 제어 기술이 발달하면서 다양한 소자들의 소형 경량화가 빠르게 이루어지고 있다. 본 논문에서는 소형 경량화 된 디스플레이 소자인 Microdisplay와 CMOS 이미지센서의 특성, 제어방식 및 적용에 대하여 연구하였다. 그리고 이를 SOPC(system on a programmable chip) 설계 기법을 적용하여 설계하였다.

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