Virtual reality helmet and control method thereof

Patent metadata

Field	Value
Publication number	US-10816752-B2
Application number	US-201815918543-A
Country	US
Kind code	B2
Filing date	Mar 12, 2018
Priority date	Sep 25, 2017
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

The present disclosure relates to a virtual reality helmet and a control method. The virtual reality helmet includes an optical lens group including lenses that include at least two optical lenses arranged along a direction of an optical axis of the lenses; and a lens distance adjusting module configured to automatically adjust a distance of at least one of the lenses relative to a display screen along the direction of the optical axis of the lenses so that a focal length of the optical lens group is adapted to the diopter of a helmet wearer.

First claim

What is claimed is:

1. A virtual reality helmet, comprising:
a display screen;
an optical lens group comprising lenses that comprise at least two optical lenses arranged along a direction of an optical axis of the lenses; and
a lens distance adjusting module configured to automatically adjust a distance of at least one of the lenses relative to the display screen along the direction of the optical axis of the lenses so that a focal length of the optical lens group is adapted to a diopter of a helmet wearer,
wherein the optical lens group is located between the display screen and the helmet wearer's eyeball, the optical lens group comprises a first optical lens near the helmet wearer's eyeball side and a second optical lens near the display screen side, the first optical lens being a convex lens, the second optical lens being a concave lens, the first optical lens is fixed relative to the display screen, and the lens distance adjusting module is configured to adjust the distance of the second optical lens relative to the display screen.

2. The virtual reality helmet according to claim 1 , further comprising: an eyesight detection module arranged inside a shell of the virtual reality helmet and configured to detect eyesight of the helmet wearer to acquire the diopter of the helmet wearer.

3. The virtual reality helmet according to claim 1 , further comprising: a diopter receiving module configured to receive a diopter inputted from the outside.

4. The virtual reality helmet according to claim 1 , wherein the lens distance adjusting module comprises:
a controller configured to acquire the diopter of the helmet wearer and calculate a lens adjustment parameter; and
an adjustment mechanism configured to adjust the distance of the at least one of the lenses relative to the display screen along the direction of the optical axis of the lenses according to the lens adjustment parameter from the controller.

5. The virtual reality helmet according to claim 4 , wherein the adjustment mechanism comprises:
a power mechanism configured to output power according to the lens adjustment parameter, and
a transmission mechanism disposed between the power mechanism and a lens holder on which the at least one of the lenses is mounted, the transmission mechanism being configured to transmit the power outputted from the power mechanism to the lens holder to move the lens holder along the direction of the optical axis of the lenses.

6. The virtual reality helmet according to claim 5 , wherein the power mechanism comprises a servo motor or a stepping motor.

7. The virtual reality helmet according to claim 5 , wherein the transmission mechanism comprises a gear set and a lead screw, and the power mechanism drives the lead screw to rotate through transmission action of the gear set.

8. The virtual reality helmet according to claim 7 , wherein
an output shaft of the power mechanism is perpendicular to a rotation axis of the lead screw, and
the gear set comprises a first gear mounted on the output shaft of the power mechanism and a second gear, which is fixedly connected to the lead screw and engaged with the first gear, wherein a rotation axis of the second gear coincides with the rotation axis of the lead screw.

9. The virtual reality helmet according to claim 1 , wherein at least one of the lenses is an aspheric lens.

10. The virtual reality helmet according to claim 1 , wherein
the optical lens group comprises a left eye lens group and a right eye lens group, each comprising at least two optical lenses arranged along the direction of the optical axis of the at least two optical lenses;
the lens distance adjusting module is configured to individually adjust one or more of the at least two optical lenses of the left eye lens group and one or more of the at least two optical lenses of the right eye lens group respectively.

11. The virtual reality helmet according to claim 1 , wherein
the optical lens group comprises a left eye lens group and a right eye lens group, each comprising at least two optical lenses arranged along the direction of the optical axis of the at least two optical lenses;
the lens distance adjusting module is configured to synchronously adjust one or more of the at least two optical lenses of the left eye lens group and one or more of the at least two optical lenses of the right eye lens group.

12. The virtual reality helmet according to claim 1 , wherein a thickness of the first optical lens ranges from 1.5 mm to 3.5 mm, and a thickness of the second optical lens ranges from 3 mm to 7 mm.

13. A control method based on the virtual reality helmet according to claim 1 , comprising:
acquiring the diopter of the helmet wearer;
automatically adjusting a distance of at least one of the lenses in the optical lens group relative to the display screen along a direction of an optical axis of the lenses, so that the focal length of the optical lens group is adapted to the diopter of the helmet wearer.

14. The control method according to claim 13 , wherein the acquiring comprises:
detecting eyesight of the helmet wearer by eyesight detection module arranged inside a shell of the virtual reality helmet to acquire the diopter of the helmet wearer.

15. The control method according to claim 13 , wherein the acquiring comprises:
receiving a diopter inputted from the outside.

16. The control method according to claim 13 , wherein the adjusting comprises:
calculating a lens adjustment parameter according to the diopter of the helmet wearer;
according to the lens adjustment parameter, adjusting the distance of the at least one of the lenses relative to the display screen along the direction of the optical axis of the lenses by an adjustment mechanism.

17. A virtual reality helmet comprising:
a memory; and
a processor coupled to the memory, the processor being configured to execute the control method according to claim 13 based on instructions stored in the memory.

18. A non-transitory computer readable storage medium storing a computer program which, when executed by a processor, implements the control method according to claim 13 .

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Xin
• Zhou Lin
• Yang Fan
• Du Jianhua

Classifications

• G02B7/09 Primary

  adapted for automatic focusing or varying magnification · CPC title

• G02B27/0176

  characterised by mechanical features · CPC title

• G02B27/0093

  with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking · CPC title

• G06F1/163

  Wearable computers, e.g. on a belt · CPC title

• G02B2027/0181

  Adaptation to the pilot/driver · CPC title