Tandem OLED and reflective LCD with a microlens array

Jiun Haw Lee*, Xinyu Zhu, Yi-Hsin Lin, Zhibing Ge, Wing Kit Choi, Kuan Yu Chen, Mao Kuo Wei, Shin Tson Wu

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


A tandem device by stacking a normally black reflective liquid crystal display (NB-RLCD) and an organic light-emitting device (OLED) is demonstrated which can be operated under bright and dark ambient by switching between the two modes. The vertically integrated architecture increases the aperture ratio, brightness and resolution of the display. The normally black characteristic of the RLCD serves a function to increase the ambient contrast ratio (A-CR) under OLED mode operation. Under NB-RLCD mode operation, a high A-CR over 40:1 was obtained. Besides, a microlens array is embedded to the device for improving the viewing angle of the RLCD (CR>2:1 over 55° viewing cone) and enhancing (44%) the external quantum efficiency of the OLED.

Original languageEnglish
Pages (from-to)68-70
Number of pages3
JournalDigest of Technical Papers - SID International Symposium
Issue number1
StatePublished - 1 Jan 2006
Event44th International Symposium, Seminar, and Exhibition, SID 2006 - San Francisco, CA, United States
Duration: 4 Jun 20069 Jun 2006

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