Apple Inc.

Xiaoyong Fu

Xianwei Zhao

Sunggu Kang

Hyungryul J Choi

Zhenbin Ge

Lei Yu

Tingjun Xu

Guocheng Shao

Francesco Aieta

Ove Lyngnes

Yifei Wang

Yoshitaka Matsui

Xingxing Cai

Tianbo Sun

Jun Xie

Wencong Zhu

Zhujun Shi

Shigeto Kobori

Yukinori Asakawa

An electronic device may have a display system. The display system may include a waveguide, an input coupler, and a surface relief grating (SRG) structure. There are various ways to form a SRG structure. In one example, nanoimprinting may be performed on a low-index resin to form a mold for a subsequent deposition of high-index material. The high-index material conforms to the mold to form ridges for the SRG structure. A reusable mold may be formed with a plurality of ridges on a flexible substrate and coated by an anti-stick coating. The reusable mold may be coated with a high-index material that is attached to a glass substrate and cured to form a wafer-level SRG structure with high-index ridges on a glass substrate. The wafer-level SRG structure is subsequently diced. SRG structures may also be formed that include varying trough thicknesses, varying ridge thicknesses, and/or a sloped substrate.

Methods of forming holographic gratings for optical systems

An electronic device may have a housing with a display. A transparent portion of the housing may serve as a display cover layer and may overlap an array of pixels in the display. The array of pixels may form an active area of the display for displaying images for a user. An ambient light sensor window may be formed in an inactive area of the display that does not overlap pixels. An ambient light sensor may be mounted in an interior region of the housing. A metal-coated light guide may have a first end aligned with the ambient light sensor window to receive ambient light from an exterior region surrounding the device and may have a second end at which the ambient light is provided to the ambient light sensor.

Electronic devices with light sensor waveguides

Growing community of inventors

Cupertino, CA, United States of America

Xiaoyong Fu