公开(公告)号：US20190285942A1

公开(公告)日：2019-09-19

申请号：US16294727

申请日：2019-03-06

Applicant: Apple Inc.

Inventor： Rong Liu ,  Edward H Kang ,  Jun Qi ,  Mookyung Son ,  Pee Khaim So ,  Victor H. Yin ,  Wei Lv ,  Wenyong Zhu ,  Zhenyue Luo ,  Xinyu Zhu ,  Ling Han ,  Hung Sheng Lin

IPC: G02F1/1335 ,  H05K1/18 ,  H05K1/02 ,  H05K3/22 ,  H05K3/34

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 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.

公开(公告)号：US20190265548A1

公开(公告)日：2019-08-29

申请号：US16409567

申请日：2019-05-10

Applicant: Apple Inc.

Inventor： Rong Liu ,  Yu P. Sun ,  Abdeslam Hafidi ,  Erik A. Zweigle ,  Jun Qi ,  Mingxia Gu ,  Victor H. Yin ,  Xiangtong Li ,  Yanming Li ,  Yi Huang ,  Ziruo Hong

IPC: G02F1/1335

Abstract: 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.

公开(公告)号：US10237936B2

公开(公告)日：2019-03-19

申请号：US15784943

申请日：2017-10-16

Applicant: Apple Inc.

Inventor： Mohammad J. Navabi-Shirazi ,  Alejandro Lara Ascorra ,  Asif Hussain ,  Ji Yeoul Ryoo ,  Jingdong Chen ,  Jun Qi ,  Manisha P. Pandya ,  Yanhui Xie

IPC: H05B37/02 ,  H05B33/08 ,  G02F1/1335 ,  G02F1/13357 ,  G02F1/1343

Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes. The control circuitry may operate a light-emitting diode using a multi-peak pulse-width-modulation signal. The control circuitry may include a multi-stage driver having a relatively larger driver stage for providing a direct current through a light-emitting diode and a relatively smaller driver stage configured to cooperate with a pulse-width-modulation controller to pulse-width-modulate a current through the light-emitting diode.

公开(公告)号：US10170080B2

公开(公告)日：2019-01-01

申请号：US15479477

申请日：2017-04-05

Applicant: Apple Inc.

Inventor： ByoungSuk Kim ,  Jun Qi ,  Ali T. Ozer ,  Bongsun Lee ,  Kevin J. Van Vechten ,  Patrick O. Heynen ,  John O. Louch

IPC: G09G5/04 ,  G09G5/14 ,  G06F1/16 ,  G09G5/00 ,  G06F3/02 ,  H01H13/83 ,  G06F3/041 ,  H05B33/08 ,  H05B37/02

Abstract: An electronic device may have a main display and an ancillary display. The device may also have a backlit keyboard with glyphs. An ambient light sensor may measure ambient light levels. Control circuitry in the laptop computer may adjust the color cast of content on the ancillary display depending on whether the content contains glyphs or other input display content or whether the content contains images, color gradients, or other output display content. Input display content may be matched in color cast to the color cast of the glyphs, which may be determined based on backlight status and/or measured ambient light information. Output content may be color matched to the main display.

公开(公告)号：US10061158B2

公开(公告)日：2018-08-28

申请号：US13664892

申请日：2012-10-31

Applicant: Apple Inc.

Inventor： Jun Qi ,  Victor H. Yin

IPC: G02F1/1335 ,  G02B3/00 ,  F21V8/00

CPC classification number: G02F1/133605 ,  G02B6/0025 ,  G02B6/0031

Abstract: An electronic device may be provided with a display. Backlight structures may be used to provide backlight for the display. The backlight structures may include a light guide plate. The light guide plate may include a planar extended portion that guides light along the back of the display and an integrated edge reflector along one or more edges of the planar extended portion. The planar extended portion and the integrated edge reflector may be formed from respective first and second shots of material. The integrated edge reflector may be formed from a polymer material with embedded reflective structures such as glass microbeads or other oxide particles. The backlight structures may include a reflective layer that is attached to the integrated edge reflector of the light guide plate using adhesive. The display may include active display pixels formed over a portion of the integrated edge reflector.

公开(公告)号：US20180090084A1

公开(公告)日：2018-03-29

申请号：US15698343

申请日：2017-09-07

Applicant: Apple Inc.

Inventor： Fenghua Zheng ,  Christopher P. Tann ,  Sandro H. Pintz ,  David S. Zalatimo ,  Jun Qi ,  Zhibing Ge

IPC: G09G3/36 ,  G06T5/00

CPC classification number: G09G3/3611 ,  G06T5/008 ,  G09G3/3614 ,  G09G3/3696 ,  G09G2310/0291 ,  G09G2320/0276 ,  G09G2320/0673 ,  G09G2340/0435 ,  G09G2360/02 ,  G09G2360/16

Abstract: Devices and methods for useful in providing localized synchronized and/or dynamic in-band internal gamma code adjustment per frame period are provided. By way of example, a display panel includes a data driver, which includes a first DAC configured to provide an internal gamma voltage signal to cause a first adjustment to an image data signal. The first adjustment is configured to selectively adjust the image data signal based at least in part on a refresh rate or a frame rate of the display panel. The data driver includes a second DAC coupled to the first DAC and configured to provide an external gamma voltage signal configured to provide a second adjustment to the image data signal, and an output buffer configured to supply the image data signal to pixels of the display panel, wherein the image data signal comprises the first adjustment and the second adjustment.

公开(公告)号：US09870739B2

公开(公告)日：2018-01-16

申请号：US14918402

申请日：2015-10-20

Applicant: Apple Inc.

Inventor： Yi Huang ,  Chenhua You ,  Gabriel Marcu ,  Jun Qi ,  Marc Albrecht

IPC: G09G3/34 ,  G09G3/36 ,  G02F1/1335 ,  F21V8/00

CPC classification number: G09G3/3413 ,  G02B6/0073 ,  G02F1/133603 ,  G02F1/133621 ,  G02F2001/133601 ,  G02F2001/133614 ,  G02F2202/36 ,  G02F2203/21 ,  G02F2203/60 ,  G09G3/3607 ,  G09G3/3611 ,  G09G2320/0233 ,  G09G2320/0242 ,  G09G2320/0285 ,  G09G2320/041 ,  G09G2320/0646 ,  G09G2360/16

Abstract: An electronic device may have a display such as a liquid crystal display. The display may have an array of pixels that display images to a user. Backlight structures may provide the array of pixels with backlight illumination at a backlight illumination level. The backlight structures may have a light source with an array of light-emitting diodes and photoluminescent material that is pumped by pump light from the light-emitting diodes. The backlight illumination may experience color variations as a function of the backlight illumination level. Circuitry in the electronic device may be used to implement a backlight level color compensator. The backlight level color compensator may apply color correction factors to the image data of the displayed images to compensate for variations in color of the image data due to variations in backlight illumination level and operating temperature.

公开(公告)号：US09830849B2

公开(公告)日：2017-11-28

申请号：US14617564

申请日：2015-02-09

Applicant: APPLE INC.

Inventor： Chaohao Wang ,  David S. Zalatimo ,  Lei Zhao ,  Christopher P. Tann ,  Paolo Sacchetto ,  Sandro H. Pintz ,  Yi Huang ,  Jun Qi

IPC: G09G3/36 ,  G09G3/20

CPC classification number: G09G3/2092 ,  G09G3/20 ,  G09G2310/0254 ,  G09G2310/04 ,  G09G2310/08 ,  G09G2320/0266 ,  G09G2340/0435

Abstract: One embodiment describes an electronic display that displays image frames with a first refresh rate or a second refresh rate, in which the second refresh rate is lower than the first refresh rate; a display driver that writes the image frames by applying voltage to a display panel; and a timing controller that receives first image data from an image source, in which the first image data describes a first image frame and a first desired refresh rate equal to the second fresh rate; and that instructs the display driver to apply a first set of voltage polarities to the display panel to display first image frame at the first refresh rate and to apply a second set of voltage polarities to the display the first image frame at the second refresh rate when polarity of inversion imbalance accumulated is equal to polarity of the first set of voltage polarities.

公开(公告)号：US09810942B2

公开(公告)日：2017-11-07

申请号：US14944016

申请日：2015-11-17

Applicant: Apple Inc.

Inventor： Chenhua You ,  Jun Qi ,  Fan-Chung Hsu ,  Victor H. Yin

IPC: G02F1/1335

CPC classification number: G02F1/133603 ,  G02F1/133609 ,  G02F1/133615 ,  G02F2001/133614 ,  G02F2202/108

Abstract: A display device is provided. The display device includes a light source emitting a blue light and a light emitting layer including a first group of red quantum dots and a second group of green quantum dots. The light emitting layer is configured to absorb a first portion of the blue light from the light source to emit red light and green light and to transmit a second portion of the blue light. The display device also includes dichroic filter layers to improve light recycling and backlight efficiency.

公开(公告)号：US09785007B2

公开(公告)日：2017-10-10

申请号：US14249237

申请日：2014-04-09

Applicant: Apple Inc.

Inventor： ByoungSuk Kim ,  Jun Qi ,  Victor H. Yin

IPC: G02F1/1335 ,  H05B33/08 ,  G09G3/34

CPC classification number: G02F1/133603 ,  G02F2001/133601 ,  G02F2001/133612 ,  G09G3/3426 ,  G09G2320/0686 ,  H05B33/086

Abstract: A display may have an array of display pixels for displaying images for a user. A backlight unit may provide backlight for the display pixels. The backlight unit may have a substrate such as a printed circuit substrate. An array of locally dimmable backlight elements may be mounted on the substrate. The substrate may be mounted against an inner surface of a metal electronic device housing or other support structure in an electronic device. Each backlight element may have a semiconductor package containing a semiconductor die. The semiconductor die may have a light-emitting diode and a light-emitting-diode control circuit. The light-emitting-diode control circuit may have a pair of transistors and a capacitor. One of the transistors may be connected in series with the light-emitting diode. The light-emitting diode control circuit may receive control signals on a gate line terminal and a source line terminal.