公开(公告)号：US10690837B2

公开(公告)日：2020-06-23

申请号：US15265361

申请日：2016-09-14

Applicant: Apple Inc.

Inventor： Rong Liu ,  Mengyang Liang ,  Yu P. Sun ,  Jun Qi ,  Victor H. Yin

IPC: F21V8/00 ,  G02F1/1335 ,  G02F1/133 ,  G02F1/13357

Abstract: A display such as a liquid crystal display may have an array of pixels that is illuminated using backlight illumination from a backlight. The backlight may have a light guide layer that distributes light from light-emitting diodes across the display. The light guide layer may have a planar portion that provides backlight illumination to the array of pixels and may have bent edge portions that curve out of the plane of the planar portion. Light scattering structures may be formed in the planar portion to extract backlight illumination from the light guide layer. A light sensor adjacent to the bent portion may monitor leaked light. The light guide layer may have two bent portions on opposing edges of the light guide layer.

公开(公告)号：US20200019019A1

公开(公告)日：2020-01-16

申请号：US16422730

申请日：2019-05-24

Applicant: Apple Inc.

Inventor： Rong Liu ,  Yu P. Sun ,  Victor H. Yin ,  Jun Qi ,  Ziruo Hong

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 an array of light-emitting diodes and a light reflector that helps reflect light from the light-emitting diodes through the pixel array. A color conversion layer may be used to convert light from the light-emitting diodes from blue light to white light. A microlens array layer formed over the color conversion layer may spread the light from the color conversion layer to homogenize the light. To ensure light is emitted from the backlight with a uniform color, the microlens array layer may have different transmittance portions. A central portion of the microlens array layer may transmit more light and reflect less light than an edge portion of the microlens array layer.

公开(公告)号：US20170363800A1

公开(公告)日：2017-12-21

申请号：US15265361

申请日：2016-09-14

Applicant: Apple Inc.

Inventor： Rong Liu ,  Mengyang Liang ,  Yu P. Sun ,  Jun Qi ,  Victor H. Yin

IPC: F21V8/00 ,  G02F1/1335

Abstract: A display such as a liquid crystal display may have an array of pixels that is illuminated using backlight illumination from a backlight. The backlight may have a light guide layer that distributes light from light-emitting diodes across the display. The light guide layer may have a planar portion that provides backlight illumination to the array of pixels and may have bent edge portions that curve out of the plane of the planar portion. Light scattering structures may be formed in the planar portion to extract backlight illumination from the light guide layer. A light sensor adjacent to the bent portion may monitor leaked light. The light guide layer may have two bent portions on opposing edges of the light guide layer.

公开(公告)号：US20170052301A1

公开(公告)日：2017-02-23

申请号：US14943202

申请日：2015-11-17

Applicant: Apple Inc.

Inventor： Rong Liu ,  Yu P. Sun ,  Jun Qi ,  Victor H. Yin

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

Abstract: A backlight unit may include a turning film that receives light from a light guide layer. The turning film may have a plurality of elongated protrusions that extend across the turning film. Each protrusion may have a concave surface. The concave surface may be a curved surface that curves inward towards the interior of the turning film. Light from the light guide layer may pass through the turning film and be reflected towards a viewer by the concave surfaces of the protrusions. In a liquid crystal display, the turning film may be interposed between the light guide layer and a lower polarizer. In certain embodiments, the turning film may be the only optical layer interposed between the light guide layer and the lower polarizer. In other embodiments, the turning layer and a diffuser layer may be the only optical layers interposed between the light guide layer and the lower polarizer.

Abstract translation: 背光单元可以包括从导光层接收光的转向膜。 转向膜可以具有跨越转向膜延伸的多个细长突起。 每个突起可以具有凹面。 凹面可以是朝向转向膜的内部向内弯曲的曲面。 来自导光层的光可以通过转向膜，并且通过突起的凹面反射到观察者。 在液晶显示器中，转动膜可以插入在导光层和下偏振器之间。 在某些实施例中，转向膜可以是介于导光层和下偏振器之间的唯一光学层。 在其他实施例中，转向层和扩散层可以是介于导光层和下偏振器之间的唯一光学层。

公开(公告)号：US11536446B2

公开(公告)日：2022-12-27

申请号：US17349787

申请日：2021-06-16

Applicant: Apple Inc.

Inventor： Rong Liu ,  Andrew Baek ,  Ethan W. Juhnke ,  Eugene A. Whang ,  Gemma A. Roper ,  Glenn K. Trainer ,  Jia Chen Pang ,  Jun Qi ,  Ka Ho P. Poon ,  Michael C. Sulkis ,  Pedro Mari ,  Syed F. Mohiuddin ,  Victor H. Yin ,  Yu P. Sun

IPC: F21V33/00 ,  F21V14/02 ,  F21V3/04 ,  G06F3/16 ,  F21Y115/10

Abstract: An electronic device such as a voice-controlled speaker device may have a housing. A speaker and other input-output components and control circuitry may be mounted within the housing. Light-emitting components may emit light that passes through a curved upper top cap portion or other housing structure. The light-emitting components may be interconnected using a flex circuit on a curved substrate or may be mounted on a planar circuit board. A subset of the light-emitting components may be rotated to improve color balance. Optical structures such as light guides, lens, microlenses, and/or a diffuser layer may be disposed over the light-emitting components to promote light mixing, to reduce hotspots, and to improve contrast on the top cap. The diffuser layer may be suspended using a support structure having baffle members to constraint the angular spread of the emitted light. Illuminated or persistently visible glyphs may be displayed in or near the top cap portion.

公开(公告)号：US11460169B1

公开(公告)日：2022-10-04

申请号：US17349782

申请日：2021-06-16

Applicant: Apple Inc.

Inventor： Rong Liu ,  Jun Qi ,  Victor H. Yin ,  Yu P. Sun ,  Meiting Wu ,  Paul J. Thompson

IPC: F21V7/09 ,  F21V14/02 ,  F21V33/00 ,  F21Y115/10

Abstract: An electronic device such as a voice-controlled speaker device may have a housing. A speaker and other input-output components and control circuitry may be mounted within the housing. Light-emitting components may emit light that passes through a curved upper top cap portion or other housing structure. Some of the light-emitting components may be rotated to improve color balance. Optical structures such as a dual-shot injection molded light control plate may be disposed over the light-emitting components to promote light mixing, reduce hotspots, and improve contrast on the top cap. The light control plate may have an upper clear layer with bell-shaped cavity portions configured to help spread light in the lateral direction and may have a reflective lower layer with dish-shaped portions configured to reflect and diffuse light back towards the top cap. The surface of the dish-shaped portions may be provided with microtextured structures to help scatter light.

公开(公告)号：US11294236B2

公开(公告)日：2022-04-05

申请号：US16891386

申请日：2020-06-03

Applicant: Apple Inc.

Inventor： Rong Liu ,  Yu P. Sun ,  Erik A. Zweigle ,  Jun Qi ,  Victor H. Yin ,  Ziruo Hong ,  Sungwon Bae

IPC: G02F1/133 ,  G02F1/13357 ,  F21K9/64 ,  F21K9/68 ,  G09G3/34 ,  G09G3/36

Abstract: An electronic device may have a display with a backlight. The backlight provides backlight illumination for an array of pixels that is displaying images. The backlight may include an array of cells. Each cell may contain a light source with one or more light-emitting diodes and a cavity reflector that reflects light from the light source outwardly through a diffuser for use in forming the backlight illumination. The light sources may be mounted to a printed circuit. Support posts on the printed circuit may be used to maintain the diffuser at a fixed distance from the printed circuit. Sensors on the printed circuit may be used to measure separation distances between the printed circuit and diffuser. Adjustments to pixel gain profiles can be made based on the measured separation distances.

公开(公告)号：US20200292885A1

公开(公告)日：2020-09-17

申请号：US16891386

申请日：2020-06-03

Applicant: Apple Inc.

Inventor： Rong Liu ,  Yu P. Sun ,  Erik A. Zweigle ,  Jun Qi ,  Victor H. Yin ,  Ziruo Hong ,  Sungwon Bae

IPC: G02F1/13357 ,  F21K9/64 ,  F21K9/68 ,  G09G3/34 ,  G09G3/36

Abstract: An electronic device may have a display with a backlight. The backlight provides backlight illumination for an array of pixels that is displaying images. The backlight may include an array of cells. Each cell may contain a light source with one or more light-emitting diodes and a cavity reflector that reflects light from the light source outwardly through a diffuser for use in forming the backlight illumination. The light sources may be mounted to a printed circuit. Support posts on the printed circuit may be used to maintain the diffuser at a fixed distance from the printed circuit. Sensors on the printed circuit may be used to measure separation distances between the printed circuit and diffuser. Adjustments to pixel gain profiles can be made based on the measured separation distances.

公开(公告)号：US11460622B1

公开(公告)日：2022-10-04

申请号：US17351099

申请日：2021-06-17

Applicant: Apple Inc.

Inventor： Rong Liu ,  Andrew Baek ,  Ethan W. Juhnke ,  Eugene A. Whang ,  Gemma A. Roper ,  Glenn K. Trainer ,  Jia Chen Pang ,  Jun Qi ,  Ka Ho P. Poon ,  Michael C. Sulkis ,  Pedro Mari ,  Syed F. Mohiuddin ,  Victor H. Yin ,  Yu P. Sun

IPC: F21V8/00 ,  F21V19/00 ,  F21V33/00 ,  F21V7/00 ,  F21V5/04 ,  F21V5/00 ,  F21V5/02

Abstract: An electronic device such as a voice-controlled speaker device may have a housing. A speaker and other input-output components and control circuitry may be mounted within the housing. Light-emitting components may emit light that passes through a curved upper top cap portion or other housing structure. The light-emitting components may be interconnected using a flex circuit on a curved substrate or may be mounted on a planar circuit board. A subset of the light-emitting components may be rotated to improve color balance. Optical structures such as light guides, lens, microlenses, and/or a diffuser layer may be disposed over the light-emitting components to promote light mixing, to reduce hotspots, and to improve contrast on the top cap. The diffuser layer may be suspended using a support structure having baffle members to constraint the angular spread of the emitted light. Illuminated or persistently visible glyphs may be displayed in or near the top cap portion.

公开(公告)号：US11022840B2

公开(公告)日：2021-06-01

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 ,  G02F1/13357

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.