• Chinese Optics Letters
  • Vol. 19, Issue 9, 092201 (2021)
Baichuan Zhao1, Ruiying Huang2, and Guojiao Lü1、*
Author Affiliations
  • 1School of Electronic Engineering, Chengdu Technological University, Chengdu 611730, China
  • 2Xihua University, Chengdu 610039, China
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    Abstract

    A micro-projection dynamic backlight for multi-view three-dimensional (3D) display is proposed. The proposed backlight includes a light emitting diodes (LEDs) array, a lenticular lens array, and a scattering film. The LED array, the lenticular lens, and the scattering film construct a micro-projection structure. In this structure, the LEDs in the array are divided into several groups. The light from each LED group can be projected to the scattering film by the lenticular lens and forms a series of bright stripes. The different LED groups have different horizontal positions, so these bright stripes corresponding to different LED groups also have different horizontal positions. Therefore, they can be used as a dynamic backlight. Because the distance between the LEDs array and the lenticular lens is much larger than the distance between the lenticular lens and the scattering films, the imaging progress will make the width of the bright stripes much smaller than that of the LEDs, and the pitch of the stripes is also decreased. According to the 3D display theory, the bright stripes with small width and pitch help to increase the number of views. Therefore, the proposed micro-projection dynamic backlight is very suitable for multi-view 3D display. An experimental prototype was developed, and the experimental results show that the micro-projection dynamic backlight can correctly complete the directional projection of the parallax images to form a 3D display.
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    Baichuan Zhao, Ruiying Huang, Guojiao Lü. Micro-projection dynamic backlight for multi-view 3D display[J]. Chinese Optics Letters, 2021, 19(9): 092201
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    Category: Optical Design and Fabrication
    Received: Dec. 22, 2020
    Accepted: Feb. 8, 2021
    Posted: May. 27, 2021
    Published Online: Jun. 2, 2021
    The Author Email: Guojiao Lü (lpzscv@163.com)