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    DISPLAYS WITH BACKLIGHT UNITS WITH SUPPORT POSTS AND CAVITY HEIGHT MONITORING
    1.
    发明申请
    DISPLAYS WITH BACKLIGHT UNITS WITH SUPPORT POSTS AND CAVITY HEIGHT MONITORING 审中-公开

    公开(公告)号：WO2018203976A1

    公开(公告)日：2018-11-08

    申请号：PCT/US2018/022935

    申请日：2018-03-16

    Applicant: APPLE INC.

    Inventor： LIU, Rong ,  SUN, Yu, P. ,  ZWEIGLE, Erik, A. ,  QI, Jun ,  YIN, Victor, H. ,  HONG, Ziruo ,  BAE, Sungwon

    IPC: G02F1/1335

    Abstract: An electronic device may have a display with a backlight (42). The backlight provides backlight illumination for an array of pixels (24) that is displaying images. The backlight includes an array of cells (38C). Each cell contains a light source (38) with one or more light-emitting diodes (38D) and a cavity reflector (68) that reflects light from the light source outwardly through a diffuser (34) for use in forming the backlight illumination. The light sources are mounted to a printed circuit (60). Support posts (90) on the printed circuit are used to maintain the diffuser at a fixed distance (H) from the printed circuit. Sensors (104) on the printed circuit are used to measure separation distances between the printed circuit and diffuser. Adjustments to pixel gain profiles can be made based on the measured separation distances to maintain uniform illumination.

    DISPLAYS WITH DIRECT-LIT BACKLIGHT UNITS
    2.
    发明申请
    DISPLAYS WITH DIRECT-LIT BACKLIGHT UNITS 审中-公开

    公开(公告)号：WO2018160304A1

    公开(公告)日：2018-09-07

    申请号：PCT/US2018/015776

    申请日：2018-01-29

    Applicant: APPLE INC.

    Inventor： LIU, Rong ,  SUN, Yu, P. ,  HAFIDI, Abdeslam ,  ZWEIGLE, Erik, A. ,  QI, Jun ,  GU, Mingxia ,  YIN, Victor, H. ,  LI, Xiangtong ,  LI, Yanming ,  HUANG, Yi ,  HONG, Ziruo

    IPC: G02F1/1335

    Abstract: An array of pixels in a display may be illuminated by a backlight having an array (36) of light-emitting diodes (38) in an array of respective cells. A reflector (68) is used to reflect light from the light-emitting diodes (38) through the array of pixels. Within the cells, the reflector (68) has cross-sectional profiles that help distribute light (80) emitted from the light-emitting diodes (38) toward edges of the cells. A light diffuser layer (34) for the backlight may have a partially reflective layer (96) such as a thin-film interference filter with an angularly dependent transmission. Within each cell, the reflector (68) may have cross-sectional profiles with portions that are parabolic or elliptical.

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