Apple Inc.

Yanming Li

Jun Qi

Mingxia Gu

Victor H Yin

ByoungSuk Kim

Yi Huang

Wei Chen

Cheng Kai Chen

Keith J Hendren

Rui Liu

Jean-Pierre Simon Guillou

Hung Sheng Lin

Tyler Robin Kakuda

Edward J Cooper

Ari P Miller

Yi Qiao

Meng-Huan Ho

Xinyu Zhu

Ying-Chih Wang

David S Hum

Joshua A Spechler

Eric Lee Benson

Donghee Nam

Ian A Guy

Meizi Jiao

Zhenyue Luo

Aleksandr N Polyakov

Kwang Ohk Cheon

Youchul Jeong

KiBeom Kim

Xiang Fang

Eric N Vergo

Janos C Keresztes

Francesco Ferretti

Chungjae Lee

Michael J Lee

Mengyang Liang

Michael C Sulkis

Morteza Amoorezaei

Marianna C Sbordone

Seth G McFarland

Jungwook Park

Sunitha Chandra

Mary M Morrison

Terence Chan

Jie Xiang

Gabriel G Marcu

Ian C Hendry

Rong Liu

Young Cheol Yang

Jean-Jacques P Drolet

Jingdong Chen

Yu P Sun

Bongsun Lee

Chenhua You

Adrian E Sun

Ziruo Hong

Abdeslam Hafidi

Erik A Zweigle

Takahide Ishii

Kerry J Kopp

Kevin J Ryan

Andrew P Aitken

Yurii Morozov

Xiangtong Li

Jason P Marini

Matthew W Cooper

Shmuel G Link

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

Textured cover assemblies for electronic devices are disclosed. The textured cover assemblies may be placed over a display and may provide anti-glare and anti-reflection properties to the electronic device.

Textured cover assemblies for display applications

A pixel array may be illuminated with backlight illumination from a backlight. The backlight may include a two-dimensional array of light-emitting diodes, with each light-emitting diode being placed in a respective cell. Different light-emitting diodes may have unique brightness magnitudes based on the content of the given display frame. Driver integrated circuits may control one or more associated light-emitting diodes to have a desired brightness level. The driver integrated circuits may be formed in an active area of the backlight. The driver integrated circuits may be arranged in groups that are daisy chained together. A digital signal (that includes information such as addressing information) may be propagated through the group of driver integrated circuits. To manage thermal performance of the backlight, the backlight may include a thermally conductive layer and/or a heat sink structure. To increase the efficiency of the backlight, the backlight may include one or more reflective layers.

Electronic device display with a backlight having light-emitting diodes and driver integrated circuits in an active area

Display structures for controlling viewing angle color shift are described. In various embodiments, polarization sensitive diffusers, independent controlled cathode thicknesses, filtermasks, touch detection layers, and color filters are described.

Viewing angle color shift control

An array of pixels in a display may be illuminated by a backlight having an array of light-emitting diodes in an array of respective cells. A reflector is used to reflect light from the light-emitting diodes through the array of pixels. Within the cells, the reflector has cross-sectional profiles that help distribute light emitted from the light-emitting diodes toward edges of the cells. A light diffuser layer for the backlight may have a partially reflective layer such as a thin-film interference filter with an angularly dependent transmission. Within each cell, the reflector may have cross-sectional profiles with portions that are parabolic or elliptical.

Displays with direct-lit backlight units

Display structures for controlling viewing angle color shift are described. In various embodiments, polarization sensitive diffusers, independent controlled cathode thicknesses, filtermasks, and color filters are described.

An electronic device may have a display mounted in a housing. The housing may have a stand that supports the housing on a support surface or may have other shapes. The display may have pixels that display an image. The display may also have a two-dimensional array of light-emitting devices such as light-emitting diodes that supply backlight illumination for the pixels. An array of temperature sensors may be overlapped by the pixels. Control circuitry may maintain historical backlight aging information during operation of the display. The aging information may include information on output brightness levels of the light-emitting diodes and light-emitting diode operating temperatures.

Electronic devices with backlit displays

A display may store extended display identification data for communicating the capabilities of the display to a source device such as a graphics processing unit. The extended display identification data may include a red primary color value, a green primary color value, and a blue primary color value. The primary color values in the extended display identification data may be determined during manufacturing. For example, a light sensor may measure the native primary colors of the display, and calibration computing equipment may determine if the native primary colors of the display are within a target color gamut. If the native primary colors of the display are outside of the target color gamut by an amount larger than a threshold, the primary color values in the extended display identification data may be adjusted to account for the color variation.

Displays with unit-specific display identification data

A display has an array of display pixels formed from display layers such as one or more polarizer layers, a substrate on which an array of display pixel elements such as color filter elements and downconverter elements are formed, a liquid crystal layer, and a thin-film transistor layer that includes display pixel electrodes and display pixel thin-film transistors for driving control signals onto the display pixel electrodes to modulate light passing through the display pixels. A light source such as one or more laser diodes or light-emitting diodes may be used to generate light for the display. The light may be launched into the edge of a polymer layer or other light guide plate structure. A light guide plate may include phase-matched structures such as holographically recorded gratings or photonic lattices that direct the light upwards through the array of display pixels.

Display having backlight with narrowband collimated light sources

Growing community of inventors

Santa Clara, CA, United States of America

Yanming Li