Head-mounted display apparatus and method for controlling the head-mounted display apparatus

1. A head-mounted display apparatus, comprising a display, a strap and a head-turning assisting device; wherein

two ends of the strap are fixedly connected to the display; and the head-turning assisting device is positioned in the strap;

when the head-mounted display apparatus is worn on a head of a human body, the display is configured to be positioned in a position of eyes of the human body, and the strap is configured to surround the head of the human body;

the display comprises a master controller and a display module, and the master controller is electrically connected to both the head-turning assisting device and the display module; and

the master controller is configured to acquire a display image from the display module, and control the head-turning assisting device to assist the head of the human body to turn according to the display image.

2. The head-mounted display apparatus according to claim 1 , wherein the head-turning assisting device comprises a first flat voice coil motor, a second flat voice coil motor, a third flat voice coil motor and a fourth flat voice coil motor;

a stationary portion of each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor is fixed to the strap, and a free portion of each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor is positioned at a side, adjacent to the head, of the strap; and

when the head-mounted display apparatus is worn on the head of the human body, the first flat voice coil motor is in contact with a left front side of the head, the second flat voice coil motor is in contact with a right rear side of the head, the third flat voice coil motor is in contact with a right front side of the head, and the fourth flat voice coil motor is in contact with a left rear side of the head.

3. The head-mounted display apparatus according to claim 2 , wherein the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor are configured to move simultaneously by a same distance, and a free portion of the third flat voice coil motor and a free portion of the fourth flat voice coil motor are configured to move simultaneously by a same distance.

4. The head-mounted display apparatus according to claim 3 , wherein when the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor move towards the head, the free portion of the third flat voice coil motor and the free portion of the fourth flat voice coil motor do not move or move in a direction away from the head;

or, when the free portion of the third flat voice coil motor and the free portion of the fourth flat voice coil motor move towards the head, the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor do not move or move in a direction away from the head.

5. The head-mounted display apparatus according to claim 2 , wherein each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor further comprises a motor controller and a motor driving circuit; and

the motor controller is configured to receive a control signal transferred by the master controller and output a drive control signal to the motor driving circuit according to the control signal, and the motor driving circuit is configured to drive the free portion to move according to the drive control signal.

6. The head-mounted display apparatus according to claim 5 , wherein the motor controller comprises an A/D conversion module, a pulse-width modulation module and a D/A conversion module; and

an input terminal of the A/D conversion module is connected to the master controller, an output terminal of the A/D conversion module is electrically connected to an input terminal of the pulse-width modulation module, an output terminal of the pulse-width modulation module is electrically connected to the D/A conversion module, and an output terminal of the D/A conversion module is electrically connected to the motor driving circuit.

7. The head-mounted display apparatus according to claim 5 , wherein each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor further comprises a feedback circuit, and the feedback circuit is electrically connected to each of the motor driving circuit and the motor controller.

8. A method for controlling a head-mounted display apparatus, the head-mounted display apparatus comprising a display, a strap and a head-turning assisting device; wherein

two ends of the strap are fixedly connected to the display; the head-turning assisting device is positioned in the strap; the display comprises a master controller and a display module, and the master controller is electrically connected to both the head-turning assisting device and the display module;

the method comprising:

wearing the head-mounted display apparatus on a head of a human body, such that the display is positioned in a position of eyes of the human body, and the strap surrounds the head of the human body;

acquiring, by the master controller, the display image from the display module;

determining, by the master controller, a preset turning direction of the head according to the display image; and

controlling, by the master controller, the head-turning assisting device to assist the head to turn toward the preset turning direction according to the preset turning direction of the head.

9. The method for controlling the head-mounted display apparatus according to claim 8 , wherein the head-turning assisting device comprises a first flat voice coil motor, a second flat voice coil motor, a third flat voice coil motor, and a fourth flat voice coil motor; a stationary portion of each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor is fixed to the strap, and a free portion of each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor is positioned at a side, adjacent to the head, of the strap; when the head-mounted display apparatus is worn on the head of the human body, the first flat voice coil motor is in contact with a left front side of the head, the second flat voice coil motor is in contact with a right rear side of the head, the third flat voice coil motor is in contact with a right front side of the head, and the fourth flat voice coil motor is in contact with a left rear side of the head;

wherein controlling the head-turning assisting device to assist the head to turn toward the preset turning direction according to the preset turning direction of the head comprises:

when the master controller determines that the preset turning direction of the head is a direction of turning to right, controlling the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor to move a first distance toward the head at a same time; and

when the master controller determines that the preset turning direction of the head is a direction of turning left, controlling the free portion of the third flat voice coil motor and the free portion of the fourth flat voice coil motor to move a second distance toward the head at a same time.

10. The method for controlling the head-mounted display apparatus according to claim 9 , further comprising:

when controlling the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor to move a first distance towards the head at a same time, controlling the free portion of the third flat voice coil motor and the free portion of the fourth flat voice coil motor not to move, or controlling the free portion of the third flat voice coil motor and the free portion of the fourth flat voice coil motor to move in a direction away from the head to be at an initial distance from the head; and

when controlling the free portion of the third flat voice coil motor and the free portion of the fourth flat voice coil motor to move a second distance towards the head at a same time, controlling the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor not to move, or controlling the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor to move in the direction away from the head to be at the initial distance from the head.

11. The method for controlling the head-mounted display apparatus according to claim 8 , wherein the head-turning assisting device comprises a first flat voice coil motor, a second flat voice coil motor, a third flat voice coil motor and a fourth flat voice coil motor;

a stationary portion of each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor is fixed to the strap, and a free portion of each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor is positioned at a side, adjacent to the head, of the strap; and

when the head-mounted display apparatus is worn on the head of the human body, the first flat voice coil motor is in contact with a left front side of the head, the second flat voice coil motor is in contact with a right rear side of the head, the third flat voice coil motor is in contact with a right front side of the head, and the fourth flat voice coil motor is in contact with a left rear side of the head.

12. The method for controlling the head-mounted display apparatus according to claim 11 , wherein the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor are configured to move simultaneously by a same distance, and a free portion of the third flat voice coil motor and a free portion of the fourth flat voice coil motor are configured to move simultaneously by a same distance.

13. The method for controlling the head-mounted display apparatus according to claim 12 , wherein when the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor move towards the head, the free portion of the third flat voice coil motor and the free portion of the fourth flat voice coil motor do not move or move in a direction away from the head;

or, when the free portion of the third flat voice coil motor and the free portion of the fourth flat voice coil motor move towards the head, the free portion of the first flat voice coil motor and the free portion of the second flat voice coil motor do not move or move in a direction away from the head.

14. The method for controlling the head-mounted display apparatus according to claim 11 , wherein each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor further comprises a motor controller and a motor driving circuit; and

the motor controller is configured to receive a control signal transferred by the master controller and output a drive control signal to the motor driving circuit according to the control signal, and the motor driving circuit is configured to drive the free portion to move according to the drive control signal.

15. The method for controlling the head-mounted display apparatus according to claim 14 , wherein the motor controller comprises an A/D conversion module, a pulse-width modulation module and a D/A conversion module; and

an input terminal of the A/D conversion module is connected to the master controller, an output terminal of the A/D conversion module is electrically connected to an input terminal of the pulse-width modulation module, an output terminal of the pulse-width modulation module is electrically connected to the D/A conversion module, and an output terminal of the D/A conversion module is electrically connected to the motor driving circuit.

16. The method for controlling the head-mounted display apparatus according to claim 14 , wherein each of the first flat voice coil motor, the second flat voice coil motor, the third flat voice coil motor and the fourth flat voice coil motor further comprises a feedback circuit, and the feedback circuit is electrically connected to each of the motor driving circuit and the motor controller.