公开(公告)号：US11598985B1

公开(公告)日：2023-03-07

申请号：US17466269

申请日：2021-09-03

Applicant: Apple Inc.

Inventor： Yuan Chen ,  Donald R. Monroe ,  Peter F. Masschelein ,  Stephen B. Lynch ,  Xiaokai Li ,  Zhibing Ge

IPC: B60J3/04 ,  G02F1/1334 ,  G02F1/1333 ,  G02F1/137 ,  G02F1/01 ,  B60J3/00

Abstract: A system such as a vehicle, building, or electronic device system may have a support structure with one or more windows. The support structure and window may separate an interior region within the system from a surrounding exterior region. Control circuitry may receive input such as user input and may adjust an adjustable layer in the window based on the input. The adjustable layer may have a polymer matrix layer with embedded cells. The cells may include intermixed guest-host liquid crystal cells and liquid crystal cells. The guest-host liquid crystal cells and liquid crystal cells may have different liquid crystal materials and/or different sizes that allow the guest-host liquid crystal cells and liquid crystal cells to electrically switch states at different respective threshold voltages. Based on the user input or other input the control circuitry can adjust a drive signal across the adjustable layer to change light transmittance and haze.

公开(公告)号：US20210350752A1

公开(公告)日：2021-11-11

申请号：US17223903

申请日：2021-04-06

Applicant: Apple Inc.

Inventor： Zhibing Ge ,  Chengrui Le ,  Yuechen Wu ,  Xiaokai Li ,  Lingyu Hong ,  Chaohao Wang ,  Shih-Chyuan Fan Jiang

IPC: G09G3/34 ,  G09G3/36

Abstract: Certain embodiments are directed to techniques (e.g., a method, an apparatus, and non-transitory computer readable medium storing code or instructions executable by one or more processors) for mitigating the flicker on the displays at low driving frequencies due to drops of the voltage holding ratio of the materials for the display. The techniques to compensate for flicker in a liquid crystal display can include generating a dynamic waveform for the backlight of the display. The dynamic waveform can be synchronized with the driving rate of the liquid crystal display such that the luminosity of the backlight increases during periods when the voltage-holding ratio drops in the materials of the display. In this way, a liquid crystal material can be utilized in a display to generate reduced power consumption with liquid crystal rate minimizing the flicker in response to the drops of the voltage-holding ratio.

公开(公告)号：US10971086B2

公开(公告)日：2021-04-06

申请号：US16265902

申请日：2019-02-01

Applicant: Apple Inc.

Inventor： Chengrui Le ,  Chaohao Wang ,  Li Tao ,  Lingyu Hong ,  Paolo Sacchetto ,  Sheng Zhang ,  Xiaokai Li ,  Yingying Tang ,  Yunhui Hou ,  Johan L. Piper

IPC: G09G3/34 ,  G09G3/36

Abstract: Aspects of the subject technology relate to pulsed backlight operation for a display backlight. Backlight pulse patterns are provided that include steady state pulse patterns to be applied during operation of a liquid crystal display unit of the display at a corresponding frame rate. The backlight pulse patterns can be arranged to prevent visible artifacts such as flicker or strobing, particularly at or near a transition between LCD frame rates. In some scenarios, transition pulse patterns are provided.

公开(公告)号：US20210048673A1

公开(公告)日：2021-02-18

申请号：US16935080

申请日：2020-07-21

Applicant: Apple Inc.

Inventor： Jin Yan ,  Xiaokai Li ,  Young Cheol Yang

IPC: G02B27/01 ,  G02F1/1335 ,  G02F1/137 ,  G02B3/12

Abstract: An electronic device such as a head-mounted device may have a display that produces a display image. The head-mounted device may have an optical system that merges real-world images from real-world objects with display images. The optical system provides the real-world images and display images to an eye box for viewing by a user. The optical system may use time interleaving techniques and/or polarization effects to merge real-world and display images. Switchable devices such as polarization switches and tunable lenses may be controlled in synchronization with frames of display images. Geometrical phase lenses may be used that exhibit different lens powers to different polarizations of light.

公开(公告)号：US10460702B2

公开(公告)日：2019-10-29

申请号：US15691687

申请日：2017-08-30

Applicant: Apple Inc.

Inventor： Nachum M. Kanovsky ,  Marc Albrecht ,  Tobias Jung ,  Xiaokai Li ,  Ameya Y. Joshi

IPC: G09G5/10 ,  G09G5/393 ,  G09G3/36 ,  G09G3/20 ,  G09G5/395 ,  G09G5/36

Abstract: Aspects of the subject technology relate to display circuitry including pixel overdrive circuitry. The pixel overdrive circuitry includes a compression engine that compresses a previous display frame, for storage and comparison to a current display frame without compression or decompression of the current display frame. The compression engine compresses the previous frame in such a way that the maximum compression error is always known and can be used to determine whether to perform overdrive operations for the current frame without compressing and decompressing the current display frame. The compression engine selects gradient encoding or decimation encoding for the compression of the previous display frame and can perform successive decimation operations within the gradient encoding operations to help reduce the size of the compressed previous frame while maintaining the quality of the ultimate overdriven current frame.

公开(公告)号：US11927864B2

公开(公告)日：2024-03-12

申请号：US18169263

申请日：2023-02-15

Applicant: Apple Inc.

Inventor： Yuan Chen ,  Xiaokai Li ,  Zhibing Ge

IPC: G02F1/141 ,  F21V8/00 ,  G02B27/01 ,  G02F1/1337 ,  G02F1/1343 ,  G09G3/00 ,  G09G3/36

CPC classification number: G02F1/141 ,  G02B6/0055 ,  G02B6/0068 ,  G02B27/0172 ,  G02F1/133723 ,  G02F1/13439 ,  G09G3/007 ,  G09G3/3629 ,  G09G2300/0408 ,  G09G2300/0491 ,  G09G2330/021 ,  G09G2340/0457

Abstract: A display may include illumination optics, a ferroelectric liquid crystal on silicon (fLCOS) panel, and a waveguide. The illumination optics may produce illumination that is modulated by the fLCOS panel to produce image light. The waveguide may direct the image light towards an eye box. The fLCOS panel may include a ferroelectric liquid crystal (fLC) layer and a backplane. In order to maximize the reflectance of the fLCOS panel and thus the optical performance of the display, the backplane may be a silver backplane or a dielectric mirror backplane. In addition, the backplane may have a cell gap that is equal to a wavelength divided by four times the birefringence of the fLC layer. In order to further optimize the optical performance of the display module, the wavelength used in determining the cell gap may be a green wavelength between 500 nm and 565 nm.

公开(公告)号：US11822191B2

公开(公告)日：2023-11-21

申请号：US16849164

申请日：2020-04-15

Applicant: Apple Inc.

Inventor： Khadijeh Bayat ,  Avery P. Yuen ,  Chaohao Wang ,  Runyu Zhang ,  Xianwei Zhao ,  Xiaokai Li ,  Yang Li ,  Zhibing Ge ,  Alex H. Pai

IPC: G02F1/1343 ,  G02B27/01 ,  G02F1/137 ,  G02F1/29

CPC classification number: G02F1/13439 ,  G02B27/0172 ,  G02F1/1343 ,  G02F1/13725 ,  G02F1/29 ,  G02B2027/0118

Abstract: An electronic device such as a head-mounted device may have a display that displays computer-generated content for a user. The head-mounted device may have an optical system that directs the computer-generated content towards eye boxes for viewing by a user. The optical system may include a spatially addressable adjustable optical component. The adjustable optical component may have first and second electrodes and an electrically adjustable material between the first and second electrodes. The electrically adjustable material may include a transparent conductive material such as indium tin oxide that includes a pattern of segmented trenches configured to provide the transparent conductive material with electrical anisotropy. Contacts may be coupled to the transparent conductive material. Control circuitry can adjust the electrically adjustable material to form a spatially addressable light modulator or adjustable lens.

公开(公告)号：US11822083B2

公开(公告)日：2023-11-21

申请号：US16935080

申请日：2020-07-21

Applicant: Apple Inc.

Inventor： Jin Yan ,  Xiaokai Li ,  Young Cheol Yang

IPC: G02B27/01 ,  G02B3/12 ,  G02F1/137 ,  G02F1/1335

CPC classification number: G02B27/0172 ,  G02B3/12 ,  G02F1/137 ,  G02F1/133528

Abstract: An electronic device such as a head-mounted device may have a display that produces a display image. The head-mounted device may have an optical system that merges real-world images from real-world objects with display images. The optical system provides the real-world images and display images to an eye box for viewing by a user. The optical system may use time interleaving techniques and/or polarization effects to merge real-world and display images. Switchable devices such as polarization switches and tunable lenses may be controlled in synchronization with frames of display images. Geometrical phase lenses may be used that exhibit different lens powers to different polarizations of light.

公开(公告)号：US20230324740A1

公开(公告)日：2023-10-12

申请号：US18169339

申请日：2023-02-15

Applicant: Apple Inc.

Inventor： Thanh Son Nguyen ,  Xiaokai Li ,  Yuan Chen ,  Zhibing Ge ,  Jian Gao

IPC: G02F1/1362 ,  G02B27/01 ,  G02F1/1335 ,  G02F1/13357

CPC classification number: G02F1/13362 ,  G02B27/0172 ,  G02F1/133603 ,  G02F1/133605 ,  G02F1/133607 ,  G02F1/133621 ,  G02F1/136281 ,  G02B2027/0112 ,  G02F2203/07

Abstract: A display may include illumination optics, a ferroelectric liquid crystal on silicon (fLCOS) panel, and a waveguide. The illumination optics may produce linear polarized illumination light that is modulated by the fLCOS panel to produce image light. The illumination optics may include light emitters that emit respective wavelengths of the illumination light. The illumination optics may include an X-plate that outputs the illumination light by combining the light emitted by the light emitters. Polarization recycling structures may be optically interposed between each of the light emitters and the X-plate. The polarization recycling structures may include a reflective polarizer. If desired, the polarizing recycling structures may also include a quarter waveplate. The polarization recycling structures may serve to minimize the amount of light lost in producing linearly polarized illumination light for the fLCOS display panel, thereby maximizing the optical efficiency of the display.

公开(公告)号：US09904502B2

公开(公告)日：2018-02-27

申请号：US14862012

申请日：2015-09-22

Applicant: Apple Inc.

Inventor： Jin Yan ,  Enkhamgalan Dorjgotov ,  Young Cheol Yang ,  Li Zhang ,  Xiaokai Li ,  Cheng Chen

IPC: G06F3/14 ,  G06F1/16 ,  H04M1/02

CPC classification number: G06F3/1423 ,  G06F1/1601 ,  G06F1/1616 ,  G06F1/1647 ,  G06F1/1649 ,  G09G2320/0261 ,  G09G2320/028 ,  G09G2360/144 ,  H04M1/0216

Abstract: Electronic equipment with displays may be provided. A first display may be mounted in a first housing and a second display may be mounted in a second housing that is adjacent to the first housing. The first housing may rotate relative to the second housing about a hinge axis. The first housing may be a lid and the second housing may be a base housing that is coupled to the lid by a hinge. A first display may be mounted in the first housing and a second display may be mounted in the second housing. Polarizer layers and other optical layers in the displays may be configured to provide a viewer with the ability to view images on the displays while wearing vertically polarized sunglasses and to suppress reflections of light emitted by the first display off of the second display.