公开(公告)号：US20190285950A1

公开(公告)日：2019-09-19

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

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：US10310167B2

公开(公告)日：2019-06-04

申请号：US15261972

申请日：2016-09-11

Applicant: Apple Inc.

Inventor： Robert Y. Cao ,  Craig C. Leong ,  Bradford J. Zercoe ,  Dinesh C. Mathew ,  Mahesh Krishnamurthi ,  Jun Qi ,  Rong Liu ,  Victor H. Yin

IPC: F21V8/00 ,  G06F1/16 ,  H01H13/02 ,  H01H13/14 ,  H01H13/83 ,  H01H13/7065

Abstract: Described is an illumination structure for a key of a keyboard. The illumination structure is used to uniformly illuminate the key and any glyphs that are present on the key. The illumination structure includes a light guide having various features that increase total internal reflection and also illuminate the glyphs of the key.

公开(公告)号：US09997304B2

公开(公告)日：2018-06-12

申请号：US15154723

申请日：2016-05-13

Applicant: Apple Inc.

Inventor： Craig C. Leong ,  Bradford J. Zercoe ,  Dinesh C. Mathew ,  Mahesh Krishnamurthi ,  Robert Y. Cao ,  Jun Qi ,  Rong Liu ,  Victor H. Yin

IPC: H01H13/02 ,  H01H13/83 ,  H01H13/14 ,  G06F3/02

CPC classification number: H01H13/023 ,  G06F3/0202 ,  H01H13/14 ,  H01H13/83 ,  H01H2219/048 ,  H01H2219/062 ,  H01H2219/0622

Abstract: Systems and methods for providing illumination to illuminable portions of keys associated with a keyboard are described. A key includes a light guide positioned below a keycap. The light guide includes one or more sidewalls that exhibit high internal reflection. In many examples, light guide sidewalls are formed with one or more prisms.

公开(公告)号：US20180059482A1

公开(公告)日：2018-03-01

申请号：US15356084

申请日：2016-11-18

Applicant: Apple Inc.

Inventor： Xiangtong Li ,  Jun Qi ,  Mingxia Gu ,  Rong Liu ,  Victor H. Yin ,  Yu P. Sun

IPC: G02F1/1335 ,  F21V3/04 ,  F21V9/16 ,  F21V9/00 ,  F21V7/00 ,  F21V13/12

CPC classification number: G02F1/133606 ,  F21V3/10 ,  F21V9/30 ,  G02F1/133509 ,  G02F1/133603 ,  G02F1/133605 ,  G02F2001/133614 ,  G02F2203/055

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 light-emitting diode cells. A cavity reflector in each cell may help distribute blue light emitted from the light-emitting diode of that cell toward edges of the cell. Optical films in the backlight may include a photoluminescent layer such as a phosphor layer that converts blue light from the light-emitting diode array into white light and may include a dichroic filter for reflecting white light away from the diode array towards the pixel array. A light diffuser layer for the backlight may have printed white ink pads, recesses filled with a high index of refraction material, protrusions for light scattering, light-scattering particles, thin-film interference filters, partially reflective mirrors, and other structures for diffusing the light from the light-emitting diodes.

公开(公告)号：US20170371086A1

公开(公告)日：2017-12-28

申请号：US15260993

申请日：2016-09-09

Applicant: Apple Inc.

Inventor： Jun Qi ,  Rong Liu ,  Victor H. Yin ,  Shenglin Ye ,  Sudirukkuge Tharanga Jinasundera ,  Nathan K. Gupta

IPC: F21V8/00

CPC classification number: G02B6/0016 ,  G02B6/00 ,  G02B6/0065 ,  G02B6/0068 ,  G02B6/0073

Abstract: A display may have a backlight with a row of light-emitting diodes that emit light into an edge surface of a light guide layer. The light guide layer may have opposing planar surfaces. Light-scattering structures such as light-scattering holes that extend between the planar surfaces may be used to scatter rays of light by refraction and/or diffraction and can thereby homogenize light from the light-emitting diodes. The homogenized light may then be extracted from the light guide layer and may serve as backlight illumination for an array of pixels such as an array of liquid crystal display pixels. Light-scattering structures such as grooves, pits, bumps, and other structures for scattering light from the light-emitting diodes may be formed on the edge surface of the light guide layer to enhance light mixing.

公开(公告)号：US20170010407A1

公开(公告)日：2017-01-12

申请号：US14878944

申请日：2015-10-08

Applicant: Apple Inc.

Inventor： Yi Huang ,  Jun Qi ,  Rong Liu ,  Victor H. Yin ,  Xinyu Zhu

IPC: F21V8/00 ,  H05B37/02

CPC classification number: G02B6/0068 ,  G02B6/0025 ,  G02B6/0046 ,  G02B6/0073 ,  G02B6/0076 ,  H05B37/0218 ,  Y02B20/46

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. The light guide may include opposing first and second edges. A first light source such as a first row of light-emitting diodes may emit light into the first edge and a second light source such as a second row of light-emitting diodes may emit light into the second edge. In a normal viewing mode, both light sources are active and backlight illumination is provided over a normal range of angles. In a restricted angle-of-view mode, only one light source is active and backlight is emitted in a more concentrated fashion over a restricted range of angles. In a high luminance restricted angle-of-view mode, the active light source is driven at an elevated level.

Abstract translation: 显示器可以具有提供背光照明的背光单元。 背光单元可以包括通过显示器分配光的光导。 光导可以包括相对的第一和第二边缘。 诸如第一排发光二极管的第一光源可以将光发射到第一边缘中，并且诸如第二排发光二极管的第二光源可以将光发射到第二边缘。 在正常观看模式下，两个光源都是有效的，并且在正常的角度范围内提供背光照明。 在受限制的视角模式中，只有一个光源处于活动状态，并且在限制的角度范围内以更集中的方式发射背光。 在高亮度限制视角模式中，主动光源以升高的水平被驱动。