Actuation for a focus adjusting head mounted display
US10610775B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 4, 2018 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Jan 4, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/002
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A head mounted display (HMD) includes an electronic display configured to display a virtual scene to a user, an optics block, an eye tracking system, and a varifocal actuation that mechanically changes a distance between the optics block and the electronic display. The varifocal actuation block is configured to change a focal length of the HMD based on the eye position of the user and includes a motor, a power screw coupled to the actuating motor configured to turn responsive to actuation of the motor, and a nut sled on the power screw that is coupled to the electronic display. The nut sled is configured to move back and forth along a length of the power screw responsive to the power screw being turned by the motor that results in movement of the electronic display relative to the optics block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.