公开(公告)号：EP3978994A1

公开(公告)日：2022-04-06

申请号：EP21210260.2

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 ,  G02F1/13357

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.

公开(公告)号：EP3952327A1

公开(公告)日：2022-02-09

申请号：EP21189852.3

申请日：2021-08-05

Applicant: Apple Inc.

Inventor： LIU, Rong ,  BAEK, Andrew ,  JUHNKE, Ethan W. ,  WHANG, Eugene A. ,  ROPER, Gemma A. ,  TRAINER, Glenn K. ,  PANG, Jia Chen ,  QI, Jun ,  POON, Ka Ho ,  SULKIS, Michael C. ,  MARI, Pedro ,  MOHIUDDIN, Syed F. ,  YIN, Victor H. ,  SUN, Yu P.

IPC: H04R1/02 ,  H04R3/00

Abstract: An electronic device such as a voice-controlled speaker device may have a housing. A speaker and other input-output components and control circuitry may be mounted within the housing. Light-emitting components may emit light that passes through a curved upper top cap portion or other housing structure. The light-emitting components may be interconnected using a flex circuit on a curved substrate or may be mounted on a planar circuit board. A subset of the light-emitting components may be rotated to improve color balance. Optical structures such as light guides, lens, microlenses, and/or a diffuser layer may be disposed over the light-emitting components to promote light mixing, to reduce hotspots, and to improve contrast on the top cap. The diffuser layer may be suspended using a support structure having baffle members to constraint the angular spread of the emitted light. Illuminated or persistently visible glyphs may be displayed in or near the top cap portion.