Direct-lit backlight units with optical films

US11513392B1 · kind B1 · utility

Assignee

• Apple Inc. · US

Inventors

• Zhenyue Luo · Santa Clara, US
• Morteza Amoorezaei · San Jose, US
• Qingbing Wang · Woodbury, US
• Chenhua You · San Jose, US
• Meizi Jiao · Chandler, US
• Chungjae Lee · San Jose, US
• Joshua A. Spechler · Cupertino, US
• Xinyu Zhu · Orlando, US
• Mingxia Gu · Campbell, US
• Jun Qi · Cupertino, US
• Eric L. Benson · Burlingame, US
• Victor H. Yin · Cupertino, US

Key dates

• Filing date: Nov 4, 2021
• Grant date: Nov 29, 2022
• Expiry date: Nov 4, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F2202/28
• WIPO field: Optics
• WIPO sector: Instruments

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 (LEDs) on a printed circuit board. The display may have a notch to accommodate an input-output component. Reflective layers may be included in the notch. The backlight may include a color conversion layer with a property that varies as a function of position. The light-emitting diodes may be covered by a slab of encapsulant with recesses in an upper surface.