Patent · US Active

Displays with direct-lit backlight units

US11333924B1 · kind B1 · utility

4Cited by

13References

20Claims

0Family size

Assignee

Apple Inc. · US

Inventors

Wei Lv · San Jose, US
Pee Khiam So · San Jose, US
Wenyong Zhu · Saratoga, US
Daming Xu · Santa Clara, US
Victor H. Yin · Cupertino, US
Mookyung Son · Cupertino, US
Ryan A. Zimmerman · San Jose, US
Ziruo Hong · Cupertino, US
Rong Liu · Sunnyvale, US
Jun Qi · Cupertino, US
Po Hsun Chen · Zhubei City, TW
Zhenbin Ge · Campbell, US
Fei Yan · Cupertino, US
Wei He · Beijing, CN

Key dates

Filing date	Aug 23, 2021
Grant date	May 17, 2022
Priority date	—
Expiry date	Aug 23, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG02F2202/36
WIPO fieldOptics
WIPO sectorInstruments

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 direct-lit backlight unit. The backlight unit may include an array of light-emitting diodes on a printed circuit board. The backlight unit may include first, second, and third light spreading layers formed over the array of light-emitting diodes. A color conversion layer may be formed over the first, second, and third light spreading layers. First and second brightness enhancement films may be formed over the color conversion layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.