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Category International Presentation
Paper Title Imprinted Lenticular Lens Array Based on Liquid Crystal for autostereoscopic 2D/3D Switchable Displays
Conference name IMID2014
Author Jiyoon Kim, Se-Um Kim, Bo-Yeon Lee, Jeng-Hun Suh, Sin-Doo Lee
Paper code Place Daegu
page Year/date 2014/08/28
Acknowledgements This work was supported by Samsung Display Co., Ltd.
Abstract For several decades, a number of attempts have been made toward realizing three-dimensional (3D) displays based on the binocular disparity including stereoscopic and autostereoscopic types. Particularly, a lenticular lens array, which is one of the essential techniques for constructing autostereoscopic 3D displays, has been extensively studied owing to the superb usability with no need of glasses, relatively high light transmittance, and wide viewing angle compared to other autostereoscopic types. For more sophisticated and cost-effective lenticular lens arrays with the switching capability between two-dimensional (2D) image and 3D image, liquid crystal (LC)-based lenticular lens arrays with the gradient refractive index (GRIN) have been demonstrated using in-plane switching electrodes, periodic undulated electrodes, or floating electrodes. A liquid crystalline polymerized lens array combined with twisted nematic LC rotators has been also suggested. However, these GRIN-type lens arrays suffer from the poor quality of the 2D image because of the small optical anisotropy or the existence of inactive regions in the LC layer. Moreover, most of them require complex fabrication processes.
In this work, we demonstrate an LC-based lenticular lens array, having the sufficient optical anisotropy, fabricated through a simple imprinting process. For the purpose of producing an effective focusing effect depending on the polarization state of the incident light, the refractive index of the polymer used for periodic, cylindrical lenses was nearly matched with the extraordinary refractive index of the surrounding LC medium. Our lenticular lens array, showing the excellent 2D image quality as well as the focusing effect for 3D imaging, will be directly applicable for autostereoscopic 2D/3D switchable display systems.
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