公开(公告)号：US20240393591A1

公开(公告)日：2024-11-28

申请号：US18488865

申请日：2023-10-17

Applicant: Apple Inc.

Inventor： Scott M. DeLapp ,  Vikrant Bhakta ,  Hyungryul Choi ,  Guolin Peng ,  Di Hu

IPC: G02B27/01 ,  F21V8/00 ,  G02B26/08 ,  G02B27/09 ,  G02B27/14

Abstract: A display device may include first and second display modules that provide image light to first and second waveguides. The waveguides may direct the image light to first and second eye boxes. Each display module may include optics mounted to a housing and mechanical alignment structures that mechanically adjust the position of an optical axis of the optics. The alignment structures may rotate the entire housing, may mechanically translate the optics, may adjust the position of a spatial light modulator within the module, and/or control circuitry may change a subset of pixels used by the modulator to compensate for optical misalignment between the first and second eye boxes. The device may include optical misalignment sensors that detect the optical misalignment. The control circuitry may compensate for the optical misalignment as detected by the optical misalignment sensors.

公开(公告)号：US20240184116A1

公开(公告)日：2024-06-06

申请号：US18440534

申请日：2024-02-13

Applicant: Apple Inc.

Inventor： Di Hu ,  Guolin Peng ,  Vikrant Bhakta ,  Jose A Dominguez-Caballero ,  Hyungryul Choi

IPC: G02B27/01

CPC classification number: G02B27/0172 ,  G02B2027/0118

Abstract: An electronic device may have a display system with a module that produces image light and a waveguide that directs the image light towards an eye box. The module may include a light source, spatial light modulator, and collimating lens between the lens and modulator. The lens may direct illumination from the light source to the modulator, which modulates the illumination to produce the image light. The lens may have a geometry that illuminates the modulator with a non-uniform illumination pattern to mitigate subsequent brightness non-uniformity introduced by the waveguide. The light source may include one or more LEDs that are independently driven by control circuitry over one or more drive lines to help mitigate the non-uniformity introduced by the waveguide and/or to operate the display in a heads-up display mode.

公开(公告)号：US20240103272A1

公开(公告)日：2024-03-28

申请号：US18254351

申请日：2021-11-24

Applicant: Apple Inc.

Inventor： Guolin Peng ,  Vikrant Bhakta ,  Scott M. DeLapp ,  Hyungryul Choi ,  Di Hu

IPC: G02B27/01

CPC classification number: G02B27/0172

Abstract: A display may include illumination optics (36), a spatial modulator (40) and a waveguide (26). The illumination optics may produce illumination that is modulated by the spatial modulator to produce image light. The waveguide may direct the image light towards an eye box. The illumination optics may include light sources (58) an X-plate (44), and at least one Fresnel lens (60) interposed between the light sources and the X-plate. The Fresnel lenses may minimize the size of the illumination optics while still exhibiting satisfactory optical performance. The spatial light modulator may include a reflective display panel (50) and a powered prism (48) with a reflective coating on a curved reflective surface. The powered prism may optimize f-number while minimizing the volume of the spatial light modulator. The collimating optics may include a diffractive optical element (56) that compensates for thermal effects and chromatic dispersion in the display.

公开(公告)号：US20240184117A1

公开(公告)日：2024-06-06

申请号：US18440812

申请日：2024-02-13

Applicant: Apple Inc.

Inventor： Scott M. DeLapp ,  Vikrant Bhakta ,  Di Hu ,  Guolin Peng ,  Darshan R Kasar ,  John Raff

IPC: G02B27/01 ,  G02B6/34

CPC classification number: G02B27/0172 ,  G02B6/34 ,  G02B2027/0174

Abstract: A display system may include a waveguide, an input coupler with a first surface relief grating (SRG), and an output coupler with a second SRG. A display module may produce image light that is coupled into the waveguide by the first SRG. The first SRG may have an input vector non-parallel with respect to a normal axis of the waveguide. The display module may have an optical axis tilted with respect to the input vector by a non-zero angle. A prism may redirect the image light from the module to the first SRG in a direction parallel to the input vector. The module may include lens elements with an optical axis offset with respect to the center of the field of the image light. This may cause the lens elements to output the image light in a direction parallel to the input vector of the first SRG.