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16 May 2018 Enhanced 3D performance by biconvex electrowetting lenticular lens structure
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In this paper, the drawbacks of the conventional electrowetting lenticular lens such as unstable operation, low dioptric power, high operating voltage, and low fill factor were resolved through a biconvex structure. In our previous study, there was only one interface between DI water and oil. However, an interface between ETPTA and oil was added to form a biconvex structure. The biconvex structure was fabricated by exploiting the phenomenon that the liquid ETPTA changes into a solid upon exposure to UV light. The amount of ETPTA was adjusted to control the curvature of the interface between the ETPTA and oil. Also, the volume of oil was controlled to realize zero dioptric power at 0V. The biconvex electrowetting lenticular lens has powerful optical properties, showing the highest dioptric power of 2000D with a 414.7um aperture diameter, and operating with a voltage 0-17V. The dioptric power was 0D at 0V, which means the shape of the lens is flat, and 2000D at 17V, which means the shape of the lens is sufficiently convex to view a 3D image. The viewing angle was measured as 46 degrees and the response time was measured as 0.83ms. Also, crosstalk of 16.18 % was measured. A 24- view image was tested by combining the fabricated 5-inch lenticular lens with a display (G Pro 2).
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Yong Hyub Won, Junoh Kim, Cheoljoong Kim, Dooseub Shin, Junsik Lee, Gyohyun Koo, and Jee Hoon Sim "Enhanced 3D performance by biconvex electrowetting lenticular lens structure", Proc. SPIE 10666, Three-Dimensional Imaging, Visualization, and Display 2018, 1066603 (16 May 2018);

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