Abstract

Transmissive electrowetting display pixels are reported with ~1000:1 contrast ratio and >50% optical transmission. This high performance is enabled by improved optical density of a black oil layer, and through use of an integrated metal reflector. The integrated metal reflector is placed such that black-oil motion self-aligns with the reflector, ensuring optimal operation of the pixel structure. The integrated reflector can also serve as a storage capacitor during active-matrix addressing. The pixels utilize new black SU-8 for the hydrophilic grid, which allows high contrast ratio in bright lighting. These high contrast electrowetting display pixels are increasingly compelling for high efficiency transmissive displays, and it is theoretically predicted that >80% transmission, <20 ms switching speed, and >1000:1 contrast ratio can be simultaneously achieved with optimized design.

© 2011 IEEE

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References

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  1. R. A. Hayes, B. J. Feenstra, "Video-speed electronic paper based on electrowetting," Nature 425, 383-385 (2003).
  2. K. Zhou, "A full description of a simple and scalable fabrication process for electrowetting display," J. Micromech. Microeng. (2009).
  3. J. Heikenfeld, "Review paper: A critical review of the present and future prospects for electronic paper," J. Soc. Inf. Display 19, 129-156 (2011).
  4. A. Giraldo, "Transmissive electrowetting-based displays for portable multimedia devices," J. Soc. Inf. Display 18, 317-325 (2010).
  5. J. Heikenfeld, A. J. Steckl, "High-transmission electrowetting light valves," Appl. Phys. Lett. 86, 151121-151121 (2005).
  6. Y. Lao, B. Sun, K. Zhou, J. Heikenfeld, "Ultra-high transmission electrowetting displays enabled by integrated reflectors," J. Display Technol. 4, 120-122 (2008).
  7. J. T. H. Tsai, "Ultrahigh contrast light valve driven by electrocapillarity of liquid gallium," Appl. Phys. Lett. 95, 251110-251110-3 (2009).
  8. B. Sun, K. Zhou, Y. Lao, J. Heikefeld, "Scalable fabrication of electrowetting displays with self-assembled oil dosing," Appl. Phys. Lett. 91, 011106 (2007).
  9. S.-W. Kuo, "A development of color-filter-free electrowetting color display by using ink jet printing technology," IDW'10 17th Int. Display Workshops (2010) pp. 435-438.
  10. B. Sun, J. Heikenfeld, "Observation and optical implication of oil dewetting patterns in electrowetting displays," J. Micromech. Microeng. 18, 025027 (2008).
  11. J. Gandhi, "37.4: High image quality of ultra-low power digital micro-shutter based display technology," SID Symp. Dig. Tech. Papers (2009) pp. 532-535.

2011 (1)

J. Heikenfeld, "Review paper: A critical review of the present and future prospects for electronic paper," J. Soc. Inf. Display 19, 129-156 (2011).

2010 (1)

A. Giraldo, "Transmissive electrowetting-based displays for portable multimedia devices," J. Soc. Inf. Display 18, 317-325 (2010).

2009 (2)

K. Zhou, "A full description of a simple and scalable fabrication process for electrowetting display," J. Micromech. Microeng. (2009).

J. T. H. Tsai, "Ultrahigh contrast light valve driven by electrocapillarity of liquid gallium," Appl. Phys. Lett. 95, 251110-251110-3 (2009).

2008 (2)

Y. Lao, B. Sun, K. Zhou, J. Heikenfeld, "Ultra-high transmission electrowetting displays enabled by integrated reflectors," J. Display Technol. 4, 120-122 (2008).

B. Sun, J. Heikenfeld, "Observation and optical implication of oil dewetting patterns in electrowetting displays," J. Micromech. Microeng. 18, 025027 (2008).

2007 (1)

B. Sun, K. Zhou, Y. Lao, J. Heikefeld, "Scalable fabrication of electrowetting displays with self-assembled oil dosing," Appl. Phys. Lett. 91, 011106 (2007).

2005 (1)

J. Heikenfeld, A. J. Steckl, "High-transmission electrowetting light valves," Appl. Phys. Lett. 86, 151121-151121 (2005).

2003 (1)

R. A. Hayes, B. J. Feenstra, "Video-speed electronic paper based on electrowetting," Nature 425, 383-385 (2003).

Appl. Phys. Lett. (3)

J. Heikenfeld, A. J. Steckl, "High-transmission electrowetting light valves," Appl. Phys. Lett. 86, 151121-151121 (2005).

J. T. H. Tsai, "Ultrahigh contrast light valve driven by electrocapillarity of liquid gallium," Appl. Phys. Lett. 95, 251110-251110-3 (2009).

B. Sun, K. Zhou, Y. Lao, J. Heikefeld, "Scalable fabrication of electrowetting displays with self-assembled oil dosing," Appl. Phys. Lett. 91, 011106 (2007).

J. Micromech. Microeng. (1)

B. Sun, J. Heikenfeld, "Observation and optical implication of oil dewetting patterns in electrowetting displays," J. Micromech. Microeng. 18, 025027 (2008).

J. Soc. Inf. Display (1)

A. Giraldo, "Transmissive electrowetting-based displays for portable multimedia devices," J. Soc. Inf. Display 18, 317-325 (2010).

J. Display Technol. (1)

J. Micromech. Microeng. (1)

K. Zhou, "A full description of a simple and scalable fabrication process for electrowetting display," J. Micromech. Microeng. (2009).

J. Soc. Inf. Display (1)

J. Heikenfeld, "Review paper: A critical review of the present and future prospects for electronic paper," J. Soc. Inf. Display 19, 129-156 (2011).

Nature (1)

R. A. Hayes, B. J. Feenstra, "Video-speed electronic paper based on electrowetting," Nature 425, 383-385 (2003).

Other (2)

S.-W. Kuo, "A development of color-filter-free electrowetting color display by using ink jet printing technology," IDW'10 17th Int. Display Workshops (2010) pp. 435-438.

J. Gandhi, "37.4: High image quality of ultra-low power digital micro-shutter based display technology," SID Symp. Dig. Tech. Papers (2009) pp. 532-535.

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