• Patent Title: Head mounted display with lightguide and multiple combiners
  • Application No.: US17431986
    Application Date: 2019-12-04
  • Publication No.: US12174395B2
    Publication Date: 2024-12-24
  • Inventor: Yi QinOzan Cakmakci
  • Applicant: GOOGLE LLC
  • Applicant Address: US CA Mountain View
  • Assignee: GOOGLE LLC
  • Current Assignee: GOOGLE LLC
  • Current Assignee Address: US CA Mountain View
  • International Application: PCT/US2019/064406 WO 20191204
  • International Announcement: WO2020/256769 WO 20201224
  • Main IPC: G02B27/00
  • IPC: G02B27/00 G02B5/04 G02B27/01 G02B27/28 G02F1/31
Head mounted display with lightguide and multiple combiners
Abstract:
A head mounted display (HMD) provides multiple fields of view of a single micro-display by time-multiplexing the provision of light of different polarizations. The HMD includes a micro-display, a lightguide, and a plurality of combiners coupled to the lightguide, wherein each combiner is configured to combine light of a different polarization. For example, the HMD can include two combiners, with one combiner configured to combine P-polarized light and the other combiner configured to combine S-polarized light. A polarizer switch is included in a filter stack for the lightguide, and a control module controls the switch to alternate the provision of light having P-polarization and S-polarization, respectively. The light of each polarization provides a different field of view of the micro-display.
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