Dynamic push-pull lenses for xr displays

A method of dynamically adapting focal distance to vergence distance in an extended reality (XR) display system, comprising:

• displaying virtual visual content at respective positions on image presentation surfaces of image presentation components of a left near-eye optical see-through XR display and right near-eye optical see-through XR display of the XR display system such that a gaze direction of a user's left eye and a gaze direction of the user's right eye intersect at a vergence distance from the user when viewing the virtual visual content on the near-eye optical see-through XR displays;
• and
• switching a dynamic pull lens and a dynamic push lens of each near-eye optical see-through XR display between an active state and an inactive state based on the vergence distance, wherein:
• the dynamic push lens is positioned on a world-facing side of the image presentation component of the respective near-eye optical see-through XR display, the dynamic push lens comprising a liquid crystal cell dynamically switchable by an electrical stimulus between an inactive state and an active state, the dynamic push lens being configured to, in the active state, converge environmental light approaching the image presentation component from a world-facing side of the image presentation component, such that the dynamic pull lens in the active state applies a positive optical power to the environmental light;
• and
• the dynamic pull lens is positioned on an eye-facing side of the image presentation component of the respective near-eye optical see-through XR display, the dynamic pull lens comprising a liquid crystal cell dynamically switchable by an electrical stimulus between an inactive state and an active state, the dynamic pull lens being configured to, in the active state, diverge light passing out of an eye-facing side of the image presentation component toward the user's respective eye, such that the dynamic pull lens in the active state applies a negative optical power to the light.

A non-transitory computer-readable storage medium, the computer-readable storage medium including instructions that when executed by a processor of a system, cause the system to perform operations comprising:

• displaying virtual visual content at respective positions on image presentation surfaces of image presentation components of a left near-eye optical see-through XR display and right near-eye optical see-through XR display of the system such that a gaze direction of a user's left eye and a gaze direction of the user's right eye intersect at a vergence distance from the user when viewing the virtual visual content on the near-eye optical see-through XR displays;
• and
• switching a dynamic pull lens and a dynamic push lens of each near-eye optical see-through XR display between an active state and an inactive state based on the vergence distance, wherein:
• the dynamic push lens is positioned on a world-facing side of the image presentation component of the respective near-eye optical see-through XR display, the dynamic push lens comprising a liquid crystal cell dynamically switchable by an electrical stimulus between an inactive state and an active state, the dynamic push lens being configured to, in the active state, converge environmental light approaching the image presentation component from a world-facing side of the image presentation component, such that the dynamic pull lens in the active state applies a positive optical power to the environmental light;
• and
• the dynamic pull lens is positioned on an eye-facing side of the image presentation component of the respective near-eye optical see-through XR display, the dynamic pull lens comprising a liquid crystal cell dynamically switchable by an electrical stimulus between an inactive state and an active state, the dynamic pull lens being configured to, in the active state, diverge light passing out of an eye-facing side of the image presentation component toward the user's respective eye, such that the dynamic pull lens in the active state applies a negative optical power to the light.