Light-adaptable display for the future advertising service. Issue 4 (1st October 2016)

• Record Type: Journal Article
• Authors: Byun, Chun-Won; Yang, Jong-Heon; Pi, Jae-Eun; Lee, Hyunkoo; Kim, Gi-Heon; Kwon, Byoung-Hwa; Cho, Seong M.; Lee, Jeong-Ik; Kim, Yong-Hae; Cho, Kyoung-Ik; Cho, Sung Haeng; Lee, Seung-Woo; Hwang, Chi-Sun
• Is Part Of: Journal of information display. Volume 17:Issue 4(2016)
• Page Start: 159
• Page End: 167
• Publication Date: 2016-10-01
• Subjects: Light-adaptable display -- dual-mode display -- public display; Information display systems -- Periodicals; Information display systems; Electronic journals; Periodicals; 621.381542
• DOI: 10.1080/15980316.2016.1241831
• Languages: English
• ISSNs: 1598-0316

Abstract

ABSTRACT: In this paper, a new light-adaptable display (LAD) structure with minimum power consumption is proposed for the future advertising service, and the demonstrated results are reported. An organic light-emitting diode with color reflection (colored OLED) was applied for the reflective- and emissive-mode device, and a guest-host liquid-crystal device (GH-LC) was adopted for the light shutter device. The current efficiency and reflectance of the colored OLED were 35.15 cd/A at 457 cd/m 2 luminance and 63% for the yellow color, respectively. The measured contrast ratio of GH-LC was 15.5:1 at dark-room conditions, respectively. Transparent oxide thin-film transistors were used for the backplane, and their average mobility was 9.08 cm 2 /V s, with a 0.5 standard deviation. Through the optimization of the fabrication process and the structures of each device, the LAD adaptively operating according to the environmental illuminance from dark to 10, 000 nits was successfully demonstrated. Moreover, a new LAD driving method was proposed for minimizing the power consumption.