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：US20250028082A1

公开(公告)日：2025-01-23

申请号：US18904959

申请日：2024-10-02

Applicant: Apple Inc.

Inventor： Jian Gao ,  Francesco Aieta ,  Jaebum Chung ,  Ligang Wang ,  Se Baek Oh ,  Brandon Born

IPC: G02B1/11 ,  F21V8/00 ,  G02B5/18 ,  G02B27/01

Abstract: A display system may include a waveguide and at least one surface relief grating (SRG) structure. The SRG structure may include a plurality of ridges separated by a plurality of troughs. The SRG structure may include an anti-reflective layer to mitigate specular reflections off of the ridges. The anti-reflective layer may be formed above the ridges such that the ridges are interposed between the waveguide and the anti-reflective layer. In this type of arrangement, the anti-reflective layer may fill the troughs between the ridges or may be patterned to overlap the ridges without filing the troughs. The anti-reflective layer may be formed below the ridges such that the anti-reflective layer is interposed between the ridges and the waveguide. The SRG structure may include multiple anti-reflective layers. When multiple anti-reflective layers are included, the anti-reflective layers may have at least one differing property (e.g., material, number of layers, dimension).