公开(公告)号：US20220334431A1

公开(公告)日：2022-10-20

申请号：US17409458

申请日：2021-08-23

Applicant: Apple Inc.

Inventor： Daming Xu ,  Wei Lv ,  Pee Khiam So ,  Wenyong Zhu ,  Rong Liu ,  Victor H. Yin ,  Mookyung Son ,  Jun Qi ,  Yufeng Yan ,  Shaofeng Liu ,  Thomas O. Henry ,  Suraj P. Gorkhali

IPC: G02F1/13357

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.

公开(公告)号：US11009745B2

公开(公告)日：2021-05-18

申请号：US16294723

申请日：2019-03-06

Applicant: Apple Inc.

Inventor： Rong Liu ,  Daming Xu ,  Joshua A. Spechler ,  Jun Qi ,  Victor H. Yin ,  Ling Han ,  Juan He ,  Ziruo Hong ,  Mookyung Son ,  Heesang Suh ,  Xinyu Zhu

IPC: G02F1/1335 ,  G02F1/13357 ,  H05K1/02 ,  H05K1/18 ,  H05K3/22 ,  H05K3/34 ,  F21K9/64 ,  H01L25/075 ,  H01L33/54 ,  H01L33/62 ,  H01L33/64 ,  F21Y115/10

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：US10571743B2

公开(公告)日：2020-02-25

申请号：US15688736

申请日：2017-08-28

Applicant: Apple Inc.

Inventor： Byungsoo Ko ,  Daming Xu ,  Heesang Suh ,  Michael Tom ,  Shin-Ying Lu ,  Thomas Mueller ,  Wenyong Zhu ,  Victor H. Yin ,  Mookyung Son

IPC: G02F1/1335 ,  F21V8/00

Abstract: A display may have a backlight unit that provides backlight illumination. The backlight unit may include a light guide that distributes light through the display. Light-emitting diodes may emit light into the light guide. A reflector that is overlapped by the light guide may help reflect light upwards through an array of pixels. The backlight unit may have a chassis that receives the reflector, light guide, light-emitting diodes, and optical films such as diffusers and prism films. Optical and mechanical features in the backlight unit may enhance color and intensity uniformity for the backlight illumination and may help enhance durability.

公开(公告)号：US20190285944A1

公开(公告)日：2019-09-19

申请号：US16294732

申请日：2019-03-06

Applicant: Apple Inc.

Inventor： Rong Liu ,  Jun Qi ,  Victor H. Yin ,  Wei Lv ,  Joshua A. Spechler ,  Yu P. Sun ,  Suraj P. Gorkhali ,  Daming Xu ,  Edward H. Kang ,  Wenyong Zhu ,  Ziruo Hong ,  Xinyu Zhu ,  Ling Han ,  Mookyung Son ,  Pee Khiam So ,  Janos C. Keresztes ,  Chenhua You ,  Zhenyue Luo ,  Heesang Suh ,  Juan He ,  Hung Sheng Lin

IPC: G02F1/1335 ,  H05K1/18 ,  H01L33/54 ,  H01L33/62 ,  H01L25/075

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：US20190285943A1

公开(公告)日：2019-09-19

申请号：US16294731

申请日：2019-03-06

Applicant: Apple Inc.

Inventor： Rong Liu ,  Daming Xu ,  Jun Qi ,  Ling Han ,  Mookyung Son ,  Chenhua You ,  Victor H. Yin ,  Xinyu Zhu ,  Heesang Suh ,  Juan He ,  Joshua A. Spechler ,  Zhenyue Luo ,  Suraj P. Gorkhali

IPC: G02F1/1335 ,  H05K1/18

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：US20180307102A1

公开(公告)日：2018-10-25

申请号：US15688736

申请日：2017-08-28

Applicant: Apple Inc.

Inventor： Byungsoo Ko ,  Daming Xu ,  Heesang Suh ,  Michael Tom ,  Shin-Ying Lu ,  Thomas Mueller ,  Wenyong Zhu ,  Victor H. Yin ,  Mookyung Son

IPC: G02F1/1335 ,  F21V8/00

CPC classification number: G02F1/133611 ,  G02B6/0016 ,  G02B6/0025 ,  G02B6/0028 ,  G02B6/0031 ,  G02B6/0036 ,  G02B6/0055 ,  G02B6/0073 ,  G02B6/0088

Abstract: A display may have a backlight unit that provides backlight illumination. The backlight unit may include a light guide that distributes light through the display. Light-emitting diodes may emit light into the light guide. A reflector that is overlapped by the light guide may help reflect light upwards through an array of pixels. The backlight unit may have a chassis that receives the reflector, light guide, light-emitting diodes, and optical films such as diffusers and prism films. Optical and mechanical features in the backlight unit may enhance color and intensity uniformity for the backlight illumination and may help enhance durability.