阅读说明：本技术 用于头戴式显示器中的散光校正的系统和方法 (System and method for astigmatism correction in head mounted displays ) 是由 伊万·M·理查兹 高卫华 王道智 于 2019-02-26 设计创作，主要内容包括：所公开的系统可以包括：(1)透镜组件,该透镜组件响应于至少一个第一控制信号,在显示设备和观看者的眼睛之间的光路上提供沿着电子可控轴位定向的电子可控柱镜度；以及(2)控制器,该控制器(a)接收指示观看者的眼镜处方的柱镜度分量和柱镜轴位分量的信息,以及(b)基于该信息生成该至少一个第一控制信号以使得透镜组件为观看者提供沿着柱镜轴位分量定向的柱镜度分量。还公开了各种其他系统和方法。(The disclosed system may include: (1) a lens assembly responsive to at least one first control signal to provide an electronically controllable cylindrical power oriented along an electronically controllable axis in an optical path between the display device and the eye of the viewer; and (2) a controller that (a) receives information indicative of a cylinder power component and a cylinder axis component of a viewer's eyeglass prescription, and (b) generates the at least one first control signal based on the information to cause the lens assembly to provide the viewer with the cylinder power component oriented along the cylinder axis component. Various other systems and methods are also disclosed.)

1. A system, comprising:

a lens assembly responsive to at least one first control signal to provide an electronically controllable cylindrical power oriented along an electronically controllable axis in an optical path between the display device and the eye of the viewer; and

a controller, the controller:

receiving information indicative of a cylindrical power component and a cylindrical axis component of the viewer's eyeglass prescription; and

generating the at least one first control signal based on the information to cause the lens assembly to provide the lenticular component oriented along the lenticular axis component to the viewer.

2. The system of claim 1, wherein the lens assembly comprises:

a first liquid crystal lens providing the electronically controllable cylinder power; and

a rotary actuator coupled to the first liquid crystal lens and orienting the first liquid crystal lens along the electronically controllable axis.

3. The system of claim 1, wherein:

the lens assembly includes:

a first liquid crystal lens providing a first electronically controllable cylindrical power oriented along a first constant axis; and

a second liquid crystal lens providing a second electronically controllable cylindrical power oriented along a second constant axis that is rotationally offset from the first constant axis; and

the controller determines the first and second electronically controllable cylindrical powers based on the information, the first and second electronically controllable cylindrical powers resulting in providing the viewer with the cylindrical power component oriented along the cylindrical axis component.

4. The system of claim 3, wherein a rotational offset between the first and second constant axes ranges from greater than zero degrees to less than 180 degrees.

5. The system of claim 4, wherein a rotational offset between the first and second constant axes is approximately 45 degrees.

6. The system of claim 1, wherein:

the system further comprises an actuator to change a distance between the display device and the eyes of the viewer based on at least one second control signal; and

the controller:

receiving further information indicative of a sphere power component of the viewer's eyeglass prescription; and

generating the at least one second control signal to compensate for the spherical power component of the viewer based on the further information.

7. The system of claim 1, wherein:

the system further comprises:

a viewing lens in an optical path between the display device and the eye of the viewer; and

an actuator to change a distance between the viewing lens and the display device based on at least one second control signal; and

the controller:

receiving further information indicative of a sphere power component of the viewer's eyeglass prescription; and

generating the at least one second control signal to compensate for the spherical power component of the viewer based on the further information.

8. The system of claim 1, further comprising:

an input interface that receives information indicative of a cylindrical power component and a cylindrical axis component of the viewer's eyeglass prescription.

9. The system of claim 8, further comprising:

a memory storing information received through the input interface; and

a biometric device that detects a biometric characteristic of the viewer;

wherein the controller:

determining an identity of the viewer based on the biometric; and

information is retrieved from the memory based on the identity of the viewer.

10. The system of claim 9, wherein the biometric features comprise features of at least one of a fingerprint, an iris, or a retina of the viewer.

11. The system of claim 1, wherein:

the system further includes a biometric device that detects a biometric characteristic of the viewer; and

the controller generates information indicative of a cylinder power component and a cylinder axis component of a glasses prescription for the viewer based on the biometric.

12. The system of claim 11, wherein the biometric device comprises an optical wavefront sensor.

13. A system, comprising:

a display device that provides an image to be viewed by a viewer;

a lens assembly responsive to at least one first control signal to provide an electronically controllable cylindrical power oriented along an electronically controllable axis in an optical path between the display device and the viewer's eye;

an actuator to change an effective focal length between the eye of the viewer and the display device based on at least one second control signal; and

a controller, the controller:

receiving information indicative of a sphere component, a cylinder component, and a cylinder axis component of the viewer's eyeglass prescription;

based on the information, generating the at least one first control signal to cause the lens assembly to provide the viewer with the lenticular component oriented along the lenticular axis component; and

generating the at least one second control signal based on the information to compensate for the spherical power component of the viewer.

14. The system of claim 13, wherein the lens assembly comprises:

a first liquid crystal lens providing the electronically controllable cylinder power; and

a rotary actuator coupled to the first liquid crystal lens to orient the first liquid crystal lens along the electronically controllable axis.

15. The system of claim 13, wherein:

the lens assembly includes:

a first liquid crystal lens providing a first electronically controllable cylindrical power oriented along a first constant axis; and

a second liquid crystal lens providing a second electronically controllable cylindrical power oriented along a second constant axis that is rotationally offset from the first constant axis; and

the controller determines the first and second electronically controllable cylindrical powers based on the information, the first and second electronically controllable cylindrical powers resulting in providing the viewer with the cylindrical power component oriented along the cylindrical axis component.

16. The system of claim 13, wherein the actuator moves the display device relative to the viewer's eyes based on the at least one second control signal to change an effective focal distance between the viewer's eyes and the display device.

17. The system of claim 13, wherein:

the system further comprises a viewing lens positioned in an optical path between the display device and the eye of the viewer; and

the actuator moves the viewing lens relative to the display device based on the at least one second control signal to change an effective focal length between the eye of the viewer and the display device.

18. A method, comprising:

receiving information indicative of a cylindrical power component and a cylindrical axis component of a viewer's eyeglass prescription;

generating at least one control signal for a lens assembly located in an optical path between a display device and the eye of the viewer based on the information, wherein the lens assembly provides an electronically controllable cylindrical power oriented along an electronically controllable axis; and

providing, using the lens assembly, the lenticular component oriented along the lenticular axis component for a viewer based on the at least one control signal.

19. The method of claim 18, wherein the lens assembly comprises:

a first liquid crystal lens providing the electronically controllable cylinder power; and

a rotary actuator coupled to the first liquid crystal lens to orient the first liquid crystal lens along the electronically controllable axis.

20. The method of claim 18, wherein:

the lens assembly includes:

a first liquid crystal lens providing a first electronically controllable cylindrical power oriented along a first constant axis; and

a second liquid crystal lens providing a second electronically controllable cylindrical power oriented along a second constant axis that is rotationally offset from the first constant axis; and

generating the at least one control signal comprises:

determining the first electronically controllable cylindrical power and the second electronically controllable cylindrical power based on the information, the first electronically controllable cylindrical power and the second electronically controllable cylindrical power resulting in providing the viewer with the cylindrical power component oriented along the cylindrical axis component.