Augmented reality device and display method thereof

An augmented reality device, comprising:

• an eyeglass frame,
• a combiner mounted on the eyeglass frame, the combiner including an inner surface and an outer surface disposed opposite the inner surface,
• an active shutter lens mounted on the outer surface of the combiner,
• an image projector mounted on the eyeglass frame and configured to project display light to the combiner such that a first portion of the display light is emitted from the inner surface of the combiner and a second portion of the display light is emitted from the outer surface of the combiner, and
• a processor coupled to the image projector and the active shutter lens, the processor being configured to:
• turn on the image projector and turn off the active shutter lens, and
• turn off the image projector and turn on the active shutter lens,
• wherein the active shutter lens is configured to shield the second portion of the display light emitted from the outer surface of the combiner, and
• wherein the combiner is configured to emit, from the inner surface of the combiner, ambient light that enters the combiner from the outer surface of the combiner after passing through the active shutter lens.