Date

Place

Room A (Room 325)
1. Flexible Transistors for Conformable Display
August 19, 2015 (Wednesday)
09:00 ~ 10:30

[1-4]
10:15 ~ 10:30
Title:Light Adaptable Display for Future Advertising Service
Chun-Won Byun, Jong-Heon Yang, Jae-Eun Pi, Hyunkoo Lee, GiHeon Kim, Byoung-Hwa Kwon, Seong Mok Cho, Jeong-Ik Lee, Yong-Hea Kim, Kyoung Ik Cho, Sung Haeng Cho (ETRI, Korea), Seung-Woo Lee (Kyung Hee Univ., Korea), and Chi-Sun Hwang (ETRI, Korea)
Abstract: We have proposed and demonstrated a new structure of a light adaptable display (LAD) for future advertising service with minimum power consumption. A organic light emitting diode with colour reflection (coloured OLED) has been applied for reflective and emissive mode device and a guest host liquid crystal device (GH-LC) has been adopted for a light shutter device. The current efficiency and reflectance of the colored OLED were 35.15 cd/A at 457 cd/m2 ?luminance and 63% for yellow color, respectively. The measured contrast ratio of GH-LC was 15.5?:1 at the pixel area. Transparent oxide thin film transistors have been used for back-plane and its average mobility was 9.08 cm2/V��s with 0.5 standard-deviation, respectively. Through the optimization of the fabrication process and the structures of each device, we have successfully demonstrated the LAD adaptively operating according to environmetnal illuminance from dark to 10,000 nit. Moreover, we proposed the new driving methode of LAD for minimizing the power consumption. To develop the driving scheme, we measured the illuminance according to time and location, and deduce the appropriate timing of mode conversion and the optimum lumance of LAD for securing a visibility, based on the measured data.
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