67.2: High Contrast Ratio Emi‐Flective LCD with Nano‐Particle Transflector | Zendy

Yang BoRu | Zendy; Lin KunYueh | Zendy; Shieh HanPing D. | Zendy; Lee ShihNan | Zendy; Chen Chin H. | Zendy

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67.2: High Contrast Ratio Emi‐Flective LCD with Nano‐Particle Transflector

Author(s) -

Yang BoRu,

Lin KunYueh,

Shieh HanPing D.,

Lee ShihNan,

Chen Chin H.

Publication year - 2007

Publication title -

sid symposium digest of technical papers

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.351

H-Index - 44

eISSN - 2168-0159

pISSN - 0097-966X

DOI - 10.1889/1.2785687

Subject(s) - oled , liquid crystal display , materials science , contrast ratio , optoelectronics , diode , optics , layer (electronics) , nanotechnology , physics

A novel emi‐flective display that integrates a reflective liquid crystal display (R‐LCD) and an organic light emitting diode (OLED) display was demonstrated. Under the light ambience of 30 nits, the OLED achieved a gain factor of 8 in contrast ratio (CR) compared with the conventional non‐integrated OLED; besides, the OLED was fully operational and the system's CR of 5000:1 at the viewing cone of 50° could be achieved. Moreover, the R‐LCD retained a CR of 10:1 at the viewing cone of 55° in the bright ambience. To enhance the image quality of both R‐LCD and OLED, we laid a nano‐particle film (NPF) in the intermediate section of the hybrid device. The NPF was demonstrated to enhance the light extraction in transmission mode of the integrated device to 103% and the haze function of the reflection mode to a factor of 15 compared with the freestanding mirror.

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