JP-2022532931-A5 -

Dates

Publication Date

20230530

Application Date

20200522

Description

Details of one or more embodiments are described in the accompanying drawings and the following description. Other features and advantages will be evident from the description and drawings and from the claims. The present invention provides, for example, the following: (Item 1) A head-mounted display device, Light projector and, An optical assembly, wherein the optical assembly is arranged to receive light from the optical projector and direct the light toward the user during use of the head-mounted display device, and the optical assembly comprises a variable focus lens assembly, the variable focus lens assembly is Rigid refractive components, Shaping to define the opening, A flexible lens film between the shaping ring and the rigid refractive component, wherein the flexible lens film covers the aperture and Equipped with, The rigid refractive component, the shaping ring, and the flexible lens film are arranged along the axis, The rigid refractive component and the flexible lens film define a chamber between the flexible lens film and the refractive component. A certain volume of fluid is placed in the chamber, along with an optical assembly. An actuator module coupled to the variable focus lens assembly, wherein the actuator module is configured to adjust the refractive power of the variable focus lens by moving the shaping along the axis relative to the rigid refractive component such that the curvature of the flexible lens film within the aperture is corrected. A head-mounted display device equipped with the following features. (Item 2) The actuator module is configured to move the shaping relative to the rigid refractive component through a range of motion, The variable focus lens assembly is configured such that the chamber has a constant volume when the shaping is moved relative to the rigid refractive component through the range of motion. A head-mounted display device as described in item 1. (Item 3) The head-mounted display device according to item 1, wherein the actuator module is configured to increase the curvature of the flexible lens film by moving the shaping along the axis toward the rigid refractive component. (Item 4) The head-mounted display device according to item 1, wherein the actuator module is configured to reduce the curvature of the flexible lens film by moving the shaping away from the rigid refractive component along the axis. (Item 5) The variable focus lens assembly further comprises an annular film disposed within the aperture, The aforementioned volume of fluid is encapsulated by the rigid refractive component, the flexible lens, and the annular membrane. A head-mounted display device as described in item 1. (Item 6) The head-mounted display device described in item 1, wherein the shaping is rigid. (Item 7) The variable focus lens assembly further, Carrier frame and A cam ring nested within the carrier frame and Equipped with, The shaping ring is nested within the cam ring, The cam ring is configured such that the rotation of the cam ring relative to the carrier frame about the axis causes the shaping ring to move along the axis relative to the rigid bending component. A head-mounted display device as described in item 1. (Item 8) The head-mounted display device according to item 7, wherein the actuator module is configured to rotate the cam ring about the axis. (Item 9) The head-mounted display device according to item 8, wherein the actuator module comprises one or more actuator components coupled to the cam ring, selected from the group consisting of rotary motors, stepper motors, servo motors, ultrasonic motors, piezoelectric actuators, and electromechanical actuators. (Item 10) The actuator module is A shape memory alloy wire coupled to the cam ring, A heat source configured to apply heat to the shape memory alloy wire Equipped with, The actuator module is configured such that the application of heat to the shape memory alloy wire causes a change in the length of the shape memory alloy wire and rotation of the cam ring relative to the carrier frame about the axis. A head-mounted display device as described in item 8. (Item 11) The actuator module is Shape memory alloy springs, A biasing spring opposite to the shape memory alloy spring, A connecting wire, wherein the connecting wire is coupled to (i) one of the shape memory alloy spring or the biasing spring and (ii) the cam ring, A heat source configured to apply heat to a shape memory alloy wire Equipped with, The head-mounted display device according to item 8, wherein the actuator module is configured such that the application of heat to the shape memory alloy wire causes a change in the length of the shape memory alloy spring and rotation of the cam ring relative to the carrier frame about the axis. (Item 12) The actuator module is One or more permanent magnets arranged along the periphery of either the carrier frame or the cam ring, Electric windings arranged around the other of the carrier frame or the cam ring t