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Conference Paper
Integration of Reflective Colored OLED for Light-adaptable Displays
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- Authors
- Jong Tae Lim, Seong M. Cho, Hyunkoo Lee, Jun-Han Han, Jonghee Lee, Jaehyun Moon, Tae-Youb Kim, Byoung-Gon Yu, Chil Seong Ah, Hojun Ryu, Jeong-Ik Lee, Hye Yong Chu
- Issue Date
- 2014-08
- Citation
- International Meeting on Information Display (IMID) 2014, pp.1-1
- Language
- English
- Type
- Conference Paper
- Abstract
- Light-adaptable displays (LADs) can offer high visibility and low power consumption. More importantly, LADs aims to overcome the light limit imposed by the single mode display characteristics. As an effort to achieve independency from the light environment, we have proposed the use of a dual function display unit in which emissive and relflective modes are integrated. In this format, the emissive mode can work in a relatively dark environemt, while the reflective mode could work in a bright enviroment. In this work, we propose a reflective colored organic light-emitting diodes (RCOLED) system, as a type of LAD, which is composed of a color-selective reflective filter (CSRF) functioning as the reflective mode, OLED 1-3 working as the emissive mode, and an optical electrochromic shutter (OECS) functioning to pass or shield the light generated in TOLED or from the outer environment. In a RCOLED system, the CRSF part was designed based on the concept of Fabry-Pérot interferometery. A transparent OLED (TOLED) part having a multi-layered graphene cathode (MLGC) was suceessfully stacked on a CSRF by using a dry electon-injecting layer (EIL)-EIL interface bonding technology, in which the EIL faces of two components of a substrate/CRSF/insulator/ITO/organics/EIL and EIL/MLG/film were bonded. Here, we have replaced the highrelfective metal cathode with a low-reflective MLGC as the cathode for RCOLED structure. The MLGC in RCOLED suppress the distorted optical interference occurring from reflective mirrors existing in the RCOLED sytem. Finally, we complete the RCOLED system by directly integrating an OECS part on a TOLED part of a substrate/CSRF/TOLED unit. Figure 1(b) and Fig. 1(d) show a emissive and reflective images in a dual-function LAD system, respectively, when the shutter is open. Also, as shown in Fig. 1(a) and Fig. (b), when the shutter is closed, the light generated from the light environment become efficeintly blocked by the shutter in LAD system.Our work demonstrate that the dual mode approach is a technically realizable format for LAD applications.
- KSP Keywords
- Bonding technology, Dual function, Dual-Mode, Interface bonding, Light environment, Metal cathode, Multi-layered graphene, Organic light-emitting diodes(OLEDS), Reflective mode, Single mode, color-selective