The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 2021
Filed:
May. 10, 2019
Apple Inc., Cupertino, CA (US);
Rong Liu, Sunnyvale, CA (US);
Yu P. Sun, San Jose, CA (US);
Abdeslam Hafidi, Cupertino, CA (US);
Erik A. Zweigle, San Jose, CA (US);
Jun Qi, Cupertino, CA (US);
Mingxia Gu, San Jose, CA (US);
Victor H. Yin, Cupertino, CA (US);
Xiangtong Li, Fremont, CA (US);
Yanming Li, Santa Clara, CA (US);
Yi Huang, Santa Clara, CA (US);
Ziruo Hong, Cupertino, CA (US);
Apple Inc., Cupertino, CA (US);
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.