Apple Inc.

Zhenyue Luo

Victor H Yin

Jun Qi

Rong Liu

Xinyu Zhu

Chenhua You

Mookyung Son

Joshua A Spechler

Mingxia Gu

Daming Xu

Eric Lee Benson

Meizi Jiao

Ling Han

Chungjae Lee

Morteza Amoorezaei

Qingbing Wang

Keith J Hendren

Hung Sheng Lin

Edward J Cooper

Ari P Miller

Wenyong Zhu

Ziruo Hong

Yanming Li

Ian A Guy

Juan He

Youchul Jeong

Heesang Suh

Xiang Fang

Suraj P Gorkhali

Wei Lv

Eric N Vergo

Francesco Ferretti

Michael C Sulkis

Yufeng Yan

Michael J Lee

Mengyang Liang

Sunitha Chandra

Marianna C Sbordone

Seth G McFarland

Jie Xiang

Mary M Morrison

Terence Chan

Edward H Kang

Yu P Sun

Janos C Keresztes

Wei He

Pee Khiam So

Pee Khaim So

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.

Display modules with direct-lit backlight units

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.

Displays with direct-lit backlight units

Direct-lit backlight units with light-emitting diodes

Direct-lit backlight units with optical films

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.

Displays with direct-lit backlight units and color conversion layers

An array of pixels in a display may be illuminated by a backlight having an array of light sources such as light-emitting diodes. The light-emitting diodes may be mounted on a printed circuit. A reflector may be formed on the printed circuit to help reflect light from the light-emitting diodes upwards through the pixels. The reflector may include two white ink layers. Multifunctional layers and other optical films may be incorporated into the backlight. These layers may include diffusers, microlens array layers, thin-film interference filters, phosphor layers, light-collimating layers, and reflective polarizers.

Electronic devices having displays with direct-lit backlight units

Light-emitting diodes in displays with direct-lit backlight units

Growing community of inventors

Santa Clara, CA, United States of America

Zhenyue Luo