Virtual reality device and operation method of virtual reality device

An operation method of the virtual reality device, comprising:

• displaying an image content by the virtual reality device according to a corresponding viewing angle of a user;
• displaying the image content with a fixed main eyesight when the virtual reality device enters a locking mode selected by the user;
• and
• in the locking mode, the virtual reality device reduces the frame rate of the displayed image content.

A virtual reality device, comprising:

• a display module displaying a left eye image and a right eye image;
• a sensing unit sensing a head movement of a user wearing the virtual reality device;
• a graphic processing unit rendering the left eye image and the right eye image in real time to the displayed module according to eyesight of the user and according to the data sensed by the sensing unit;
• and
• a processing unit determining whether a viewing elevation angle of the user is greater than a predetermined angle for a time period, and the time period exceeds a predetermined time period according to the data sensed by the sensing unit;
• wherein when the viewing elevation angle is greater than the predetermined angle for the time period, and the time period exceeds the predetermined time period, the virtual reality device enters a locking mode;
• wherein in the locking mode, the virtual reality device displays an image content with a fixed main eyesight.