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    Displays with Direct-lit Backlight Units and Color Conversion Layers
    11.
    发明申请
    Displays with Direct-lit Backlight Units and Color Conversion Layers 审中-公开

    公开(公告)号：US20190285943A1

    公开(公告)日：2019-09-19

    申请号：US16294731

    申请日：2019-03-06

    Applicant: Apple Inc.

    Inventor： Rong Liu ,  Daming Xu ,  Jun Qi ,  Ling Han ,  Mookyung Son ,  Chenhua You ,  Victor H. Yin ,  Xinyu Zhu ,  Heesang Suh ,  Juan He ,  Joshua A. Spechler ,  Zhenyue Luo ,  Suraj P. Gorkhali

    IPC: G02F1/1335 ,  H05K1/18

    Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated with backlight illumination from a backlight unit. The backlight unit may include a printed circuit board, a plurality of light-emitting diodes mounted on the printed circuit board, at least one light spreading layer formed over the printed circuit board that spreads light received from the plurality of light-emitting diodes, a partially reflective layer formed over the at least one light spreading layer, a color conversion layer formed over the partially reflective layer, a collimating layer formed over the color conversion layer, a brightness enhancement film formed over the collimating layer, and a diffuser formed over the brightness enhancement film. The at least one light spreading layer may include two light spreading layers with elongated protrusions that are rotated relative to each other.

    Light-Emitting Diodes in Displays with Direct-lit Backlight Units
    12.
    发明申请
    Light-Emitting Diodes in Displays with Direct-lit Backlight Units 审中-公开

    公开(公告)号：US20190285942A1

    公开(公告)日：2019-09-19

    申请号：US16294727

    申请日：2019-03-06

    Applicant: Apple Inc.

    Inventor： Rong Liu ,  Edward H Kang ,  Jun Qi ,  Mookyung Son ,  Pee Khaim So ,  Victor H. Yin ,  Wei Lv ,  Wenyong Zhu ,  Zhenyue Luo ,  Xinyu Zhu ,  Ling Han ,  Hung Sheng Lin

    IPC: G02F1/1335 ,  H05K1/18 ,  H05K1/02 ,  H05K3/22 ,  H05K3/34

    Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated with backlight illumination from a backlight unit. The backlight unit may include a printed circuit board, a plurality of light-emitting diodes mounted on the printed circuit board, at least one light spreading layer formed over the printed circuit board that spreads light received from the plurality of light-emitting diodes, a partially reflective layer formed over the at least one light spreading layer, a color conversion layer formed over the partially reflective layer, a collimating layer formed over the color conversion layer, a brightness enhancement film formed over the collimating layer, and a diffuser formed over the brightness enhancement film. The at least one light spreading layer may include two light spreading layers with elongated protrusions that are rotated relative to each other.

    Electronic devices having displays with direct-lit backlight units
    19.
    发明授权
    Electronic devices having displays with direct-lit backlight units 有权

    公开(公告)号：US11054696B2

    公开(公告)日：2021-07-06

    申请号：US16629537

    申请日：2018-08-09

    Applicant: Apple Inc.

    Inventor： Rong Liu ,  Jun Qi ,  Victor H. Yin ,  Zhenyue Luo

    IPC: F21V21/00 ,  G02F1/13357 ,  G02F1/1335

    Abstract: An array of pixels in a display may be illuminated by a backlight having an array of light sources such as light-emitting diodes. The light-emitting diodes may be mounted on a printed circuit. A reflector may be formed on the printed circuit to help reflect light from the light-emitting diodes upwards through the pixels. The reflector may include two white ink layers. Multifunctional layers and other optical films may be incorporated into the backlight. These layers may include diffusers, microlens array layers, thin-film interference filters, phosphor layers, light-collimating layers, and reflective polarizers.

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