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    Color homogenizing film for displays with direct-lit backlight units
    1.
    发明授权
    Color homogenizing film for displays with direct-lit backlight units 有权

    公开(公告)号：US11036082B2

    公开(公告)日：2021-06-15

    申请号：US16422730

    申请日：2019-05-24

    Applicant: Apple Inc.

    Inventor： Rong Liu ,  Yu P. Sun ,  Victor H. Yin ,  Jun Qi ,  Ziruo Hong

    IPC: G02F1/13357 ,  G02F1/1335 ,  G02F1/1333 ,  F21V8/00

    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 an array of light-emitting diodes and a light reflector that helps reflect light from the light-emitting diodes through the pixel array. A color conversion layer may be used to convert light from the light-emitting diodes from blue light to white light. A microlens array layer formed over the color conversion layer may spread the light from the color conversion layer to homogenize the light. To ensure light is emitted from the backlight with a uniform color, the microlens array layer may have different transmittance portions. A central portion of the microlens array layer may transmit more light and reflect less light than an edge portion of the microlens array layer.

    Displays with Direct-lit Backlight Units
    4.
    发明申请
    Displays with Direct-lit Backlight Units 审中-公开

    公开(公告)号：US20190265548A1

    公开(公告)日：2019-08-29

    申请号：US16409567

    申请日：2019-05-10

    Applicant: Apple Inc.

    Inventor： Rong Liu ,  Yu P. Sun ,  Abdeslam Hafidi ,  Erik A. Zweigle ,  Jun Qi ,  Mingxia Gu ,  Victor H. Yin ,  Xiangtong Li ,  Yanming Li ,  Yi Huang ,  Ziruo Hong

    IPC: G02F1/1335

    Abstract: An array of pixels in a display may be illuminated by a backlight having an array of light-emitting diodes in an array of respective cells. A reflector is used to reflect light from the light-emitting diodes through the array of pixels. Within the cells, the reflector has cross-sectional profiles that help distribute light emitted from the light-emitting diodes toward edges of the cells. A light diffuser layer for the backlight may have a partially reflective layer such as a thin-film interference filter with an angularly dependent transmission. Within each cell, the reflector may have cross-sectional profiles with portions that are parabolic or elliptical.

    Display Systems Having Monolithic Arrays of Light-Emitting Diodes
    7.
    发明申请
    Display Systems Having Monolithic Arrays of Light-Emitting Diodes 有权

    公开(公告)号：US20220005798A1

    公开(公告)日：2022-01-06

    申请号：US17475831

    申请日：2021-09-15

    Applicant: Apple Inc.

    Inventor： Jun Qi ,  Rong Liu ,  Saijin Liu ,  Shaofeng Liu ,  Tongbi T. Jiang ,  Victor H. Yin ,  Xia Li ,  Xiang Fang ,  Ziruo Hong

    IPC: H01L25/16 ,  G02B27/01 ,  H01L23/00 ,  H01L33/62

    Abstract: An electronic device may include a display having a monolithic array of light-emitting diodes mounted to a surface of a substrate layer. The diodes may include contact pads. Driver circuitry may independently drive each of the diodes in the array using drive signals. The driver circuitry may be formed on a driver integrated circuit. Bond pads may be formed on a surface of the integrated circuit. Copper pillars may be grown on the bond pads. In another suitable arrangement, the driver circuitry may be formed on a driver printed circuit board coupled to an interposer by a flexible printed circuit. The interposer may include bond pads and copper pillars grown on the bond pads. The contact pads on each of the diodes may be simultaneously bonded to the copper pillars. A surface of the substrate layer may be patterned to form light redirecting elements if desired.

    Color Homogenizing Film for Displays with Direct-lit Backlight Units
    8.
    发明申请
    Color Homogenizing Film for Displays with Direct-lit Backlight Units 审中-公开

    公开(公告)号：US20200019019A1

    公开(公告)日：2020-01-16

    申请号：US16422730

    申请日：2019-05-24

    Applicant: Apple Inc.

    Inventor： Rong Liu ,  Yu P. Sun ,  Victor H. Yin ,  Jun Qi ,  Ziruo Hong

    IPC: G02F1/1335

    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 an array of light-emitting diodes and a light reflector that helps reflect light from the light-emitting diodes through the pixel array. A color conversion layer may be used to convert light from the light-emitting diodes from blue light to white light. A microlens array layer formed over the color conversion layer may spread the light from the color conversion layer to homogenize the light. To ensure light is emitted from the backlight with a uniform color, the microlens array layer may have different transmittance portions. A central portion of the microlens array layer may transmit more light and reflect less light than an edge portion of the microlens array layer.

    Systems With External Displays
    9.
    发明公开
    Systems With External Displays 审中-公开

    公开(公告)号：US20230378405A1

    公开(公告)日：2023-11-23

    申请号：US18182118

    申请日：2023-03-10

    Applicant: Apple Inc.

    Inventor： Yu P Sun ,  Jun Qi ,  Rong Liu ,  Ziruo Hong ,  Victor H Yin ,  Tao Zhan ,  Yong Seok Choi

    IPC: H01L33/58 ,  H01L25/075 ,  B60Q1/50

    CPC classification number: H01L33/58 ,  H01L25/0753 ,  B60Q1/5035 ,  G02B5/0284

    Abstract: A system may have an external display that presents content to viewers outside of the system. The external display may have a display panel with an array of pixels formed from light-emitting diodes. Optical films that help collimate and homogenize light from the light-emitting diode pixels may overlap the light-emitting diodes. A transparent cover may overlap the display. The transparent cover may have an outer surface and an opposing inner surface. The outer surface and inner surface may be planar or may have a curved cross-sectional profile. An optical louver layer or other solar rejection layer may be interposed between the inner surface of the transparent cover and the display panel. The louver layer may have a series of elongated parallel louvers formed from an opaque polymer or other material. The louvers may be configured to block sunlight reflections while allowing images on the display panel to be viewed.

    Displays with direct-lit backlight units
    10.
    发明授权
    Displays with direct-lit backlight units 有权

    公开(公告)号：US11022840B2

    公开(公告)日：2021-06-01

    申请号：US16409567

    申请日：2019-05-10

    Applicant: Apple Inc.

    Inventor： Rong Liu ,  Yu P. Sun ,  Abdeslam Hafidi ,  Erik A. Zweigle ,  Jun Qi ,  Mingxia Gu ,  Victor H. Yin ,  Xiangtong Li ,  Yanming Li ,  Yi Huang ,  Ziruo Hong

    IPC: G02F1/1335 ,  G02F1/13357

    Abstract: An array of pixels in a display may be illuminated by a backlight having an array of light-emitting diodes in an array of respective cells. A reflector is used to reflect light from the light-emitting diodes through the array of pixels. Within the cells, the reflector has cross-sectional profiles that help distribute light emitted from the light-emitting diodes toward edges of the cells. A light diffuser layer for the backlight may have a partially reflective layer such as a thin-film interference filter with an angularly dependent transmission. Within each cell, the reflector may have cross-sectional profiles with portions that are parabolic or elliptical.

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