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:
Apr. 07, 2020
Filed:
Mar. 06, 2019
Apple Inc., Cupertino, CA (US);
Rong Liu, Sunnyvale, CA (US);
Edward H Kang, San Francisco, CA (US);
Jun Qi, San Jose, CA (US);
Mookyung Son, Cupertino, CA (US);
Pee Khaim So, San Jose, CA (US);
Victor H. Yin, Cupertino, CA (US);
Wei Lv, San Jose, CA (US);
Wenyong Zhu, San Jose, CA (US);
Zhenyue Luo, Santa Clara, CA (US);
Xinyu Zhu, Sunnyvale, CA (US);
Ling Han, Cupertino, CA (US);
Hung Sheng Lin, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
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.