Patent · US Active

Displays with direct-lit backlight units

US12372828B2 · kind B2 · utility

0Cited by

13References

20Claims

0Family size

Inventors

Daming Xu · Santa Clara, US
Yufeng Yan · Santa Clara, US
Qingbing Wang · Woodbury, US
Chenhua You · San Jose, US
Rong Liu · Sunnyvale, US
Jun Qi · Cupertino, US
Zhenyue Luo · Santa Clara, US
Mookyung Son · Cupertino, US
Victor H. Yin · Cupertino, US

Key dates

Filing date	Apr 23, 2024
Grant date	Jul 29, 2025
Priority date	—
Expiry date	Apr 23, 2044

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.