Display apparatus for computer-mediated reality
A display apparatus configured to be coupled to a movable object includes at least a first laser sensor module and a display device configured to display a field-of-view. The first laser sensor module is configured to determine, by self mixing interference measurements, movements of the movable object with respect to a reference object mechanically coupled to the movable object. The first laser sensor module is configured to emit at least three measurement beams in three different spatial directions to the reference object when the display apparatus is coupled to the movable object and the first laser sensor module is configured to determine velocity vectors or distances collinear to the spatial directions. The display device is configured to integrate at least one virtual object in the field-of-view in accordance with the determined movements of the movable object.
1. A display apparatus configured to be coupled to a movable object, the display apparatus comprising:
a first laser sensor module; and
a display device configured to display a field-of-view,
wherein the first laser sensor module is configured to determine, by self mixing interference measurements, movements of the movable object with respect to a reference object mechanically coupled to the movable object,
wherein the first laser sensor module is configured to emit at least three measurement beams in three different spatial directions to the reference object when the display apparatus is coupled to the movable object,
wherein the first laser sensor module is configured to determine velocity vectors or distances collinear to the spatial directions, and
wherein the display device is configured to integrate at least one virtual object in the field-of-view in accordance with the determined movements of the movable object;
wherein the first laser sensor module is configured to emit the at least three measurement beams in a different solid angle of a virtual sphere around the display apparatus in comparison to the field-of-view;
wherein the display apparatus comprises a second laser sensor module, wherein the second laser sensor module is configured to determine movements of the movable object by self mixing interference measurements when the display apparatus is coupled to the movable object, wherein the second laser sensor module is configured to emit at least three measurement beams in a different solid angle of the virtual sphere around the display apparatus in comparison to the first laser sensor module;
wherein a controller is configured to switch on or off the first laser sensor module or the second laser sensor module depending on the self mixing interference signal received by the first laser sensor module or the second laser sensor module; and
wherein the second laser sensor module is configured to emit at least three measurement beams to the reference object when the display apparatus is coupled to the movable object, wherein the controller is configured to switch on or off the first laser sensor module or the second laser sensor module depending on the movements determined by the self mixing interference signals determined by the first laser sensor module or the second laser sensor module.
2. The display apparatus according to claim 1 , the display apparatus further comprising a camera device, wherein the camera device is configured to define the field-of-view of the movable object by recording images, and
wherein the display device is configured to display at least a part of the recorded images and the at least one virtual object in accordance with the determined movements of the movable object.
3. The display apparatus according to claim 2 , wherein the controller is further configured to integrate the at least one virtual object in the part of the recorded images, and wherein the controller is further configured to adapt a position of the at least one virtual object in the displayed images based on the determined movements of the movable object.
4. The display apparatus according to claim 2 , wherein the display apparatus is a handheld device comprising the display device, wherein the handheld device further comprises the camera device, wherein the field-of-view defined by the camera device is in an opposite direction in comparison to the display device, wherein the first laser sensor module is configured to emit the at least three measurement beams in the direction of a user looking at the display device, wherein the moveable object is a hand of the user.
5. The display apparatus according to claim 1 , wherein the first laser sensor module comprises an array of laser sensors, wherein the array of laser sensors is configured to emit a multitude of measurement beams in different directions, and wherein the controller is configured to determine the movements of the movable object based on self mixing interference measurements provided by at least three laser sensors of the array of laser sensors when the display apparatus is coupled to the movable object.
6. The display apparatus according to claim 1 , wherein the movable object is a head of a user, and wherein the display device is configured to be placed in close proximity to at least one eye of the user.
7. The display apparatus according to claim 1 , wherein the display device is configured to integrate the at least one virtual object in the field-of-view based on the determined movements of the moveable object with respect to the reference object.
8. The display apparatus according to claim 7 , wherein the movable object is configured to rotate around an axis defined by a linkage, the linkage mechanically coupling the reference object to the movable object, the linkage comprising a hinge and/or a bearing.
9. The display apparatus according to claim 1 , wherein the first laser sensor module is configured to deactivate based on a calculated position of the reference object with respect to the movable object.