Quality improvement of transmission images for transparent displays with micro-lens array

T. W. Huang*, W. D. Jeng, Y. Ouyang, Y. H. Tsaid, K. C. Lee, Yang-Mang Ou

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations


The technology of electrowetting display (EWD) is the most important method for the traditional displays that can work more efficiently. When the voltage drives, the aperture ratio of the ink will reach 75% and the transmittance can reach 60%. Furthermore, the EWD technology has the advantages such as high transmittance, high switching speed, color performance, low power consumption, and etc. They make the advances of technology development for the transparent displays. However, due to the diffraction phenomenon resulted from periodic pixel structures, when the users observe the background object through the transparent display, the transmitted image will be blurred. In this paper, we recognized the problems by the simulation and constructed the optical model first. In order to avoid the diffraction, we use micro lens array to prevent the rays interfere on the micro structure, so that it will not produce the destructive and constructive interference, so the diffraction effect can be reduced. The micro lens array avoid the light touches the outer frame of EWD pixels. The simulations are simulate at different distance, and the distance of diffraction width is condensed to 91% with respect to the origin. In the future, this concept can apply in other transmitted images of transparent displays.

Original languageEnglish
Title of host publicationNovel Optical Systems Design and Optimization XVII
EditorsArthur J. Davis, G. Groot Gregory
ISBN (Electronic)9781628412208
StatePublished - 1 Jan 2014
Event17th Conference of Novel Optical Systems Design and Optimization - San Diego, United States
Duration: 17 Aug 201419 Aug 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


Conference17th Conference of Novel Optical Systems Design and Optimization
Country/TerritoryUnited States
CitySan Diego


  • Diffraction
  • Image quality
  • Micro lens array
  • Transparent displays


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