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    Displays with Direct-lit Backlight Units
    2.
    发明申请
    Displays with Direct-lit Backlight Units 有权

    公开(公告)号：US20220334432A1

    公开(公告)日：2022-10-20

    申请号：US17409467

    申请日：2021-08-23

    Applicant: Apple Inc.

    Inventor： Daming Xu ,  Yufeng Yan ,  Qingbing Wang ,  Chenhua You ,  Rong Liu ,  Jun Qi ,  Zhenyue Luo ,  Mookyung Son ,  Victor H. Yin

    IPC: G02F1/13357 ,  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 direct-lit backlight unit. The backlight unit may include an array of light-emitting diodes on a printed circuit board. The backlight unit may include first, second, and third light spreading layers formed over the array of light-emitting diodes. A color conversion layer may be formed over the first, second, and third light spreading layers. First and second brightness enhancement films may be formed over the color conversion layer.

    Systems and Methods for Achieving Consistent Front-of-Screen Performance for Varying Media Rates
    3.
    发明申请
    Systems and Methods for Achieving Consistent Front-of-Screen Performance for Varying Media Rates 有权

    公开(公告)号：US20240386852A1

    公开(公告)日：2024-11-21

    申请号：US18618592

    申请日：2024-03-27

    Applicant: Apple Inc.

    Inventor： Daming Xu ,  Mingxia Gu ,  Mookyung Son ,  Victor H Yin ,  Wenzhong Liu ,  Sameer M Venugopal ,  Jun Qi

    IPC: G09G3/3258 ,  G09G3/3233

    Abstract: Front-of-screen performance of the electronic display may be highly sensitive to timing settings of emission and anode reset frequencies. Changes in the timing settings may result in diverging brightness and color performance on the electronic display, which may negatively impact user experience. In some cases, emission frequency of the self-emissive display pixels may be fixed at a value, such as 120 Hertz (Hz), 240 Hz, or 480 Hz. The anode reset frequency may be set at a divisor of the emission frequency. Some refresh rates may be divisors of the pixel emission frequency. However, other refresh rates may not be divisors of the pixel emission frequency. For such non-divisor refresh rates, different driving schemes may be used to compensate for a difference from the pixel emission frequency.

    Displays with Direct-lit Backlight Units Including Light-Emitting Diodes and Encapsulant
    6.
    发明申请
    Displays with Direct-lit Backlight Units Including Light-Emitting Diodes and Encapsulant 审中-公开

    公开(公告)号：US20190285950A1

    公开(公告)日：2019-09-19

    申请号：US16294723

    申请日：2019-03-06

    Applicant: Apple Inc.

    Inventor： Rong Liu ,  Daming Xu ,  Joshua A. Spechler ,  Jun Qi ,  Victor H. Yin ,  Ling Han ,  Juan He ,  Ziruo Hong ,  Mookyung Son ,  Heesang Suh ,  Xinyu Zhu

    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 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 device display with a backlight
    9.
    发明授权
    Electronic device display with a backlight 有权

    公开(公告)号：US10852582B2

    公开(公告)日：2020-12-01

    申请号：US16439419

    申请日：2019-06-12

    Applicant: Apple Inc.

    Inventor： Wenyong Zhu ,  Shan-Ting Hsu ,  Victor H. Yin ,  Daming Xu ,  Heesang Suh ,  Chenhua You ,  Mookyung Son

    IPC: G02F1/13357 ,  F21V8/00 ,  H05K1/11 ,  G02F1/1345 ,  H05K1/02 ,  H01R12/62 ,  H01R4/04 ,  G02F1/1368 ,  G02F1/133 ,  G09G3/00 ,  G09G3/36

    Abstract: An electronic device may include display layers such as liquid crystal display layers and a backlight unit that provides illumination for the display layers. The backlight unit may include light-emitting diodes that emit light into the edge of a light guide film. To minimize the inactive area of the display, the light-emitting diodes may be tightly spaced to approximate a line light source instead of point light sources. Color and/or luminance compensation layers may be incorporated at various locations within the backlight structures to ensure that the backlight provided to the display layers is homogenous. A thin-film transistor layer of the display may be coupled to a printed circuit board by a flexible printed circuit. The flexible printed circuit may have additional solder mask layers to improve robustness, may include encapsulation, and may have traces with a varying pitch.

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