Display device and method for displaying image

A display device comprising:

• a first display panel configured to emit first image light for a first eye of a user based on first image data, using a first gamma reference voltage;
• a second display panel configured to emit second image light for a second eye of the user based on second image data, using a second gamma reference voltage, the second display panel physically separated from the first display panel;
• and
• a processor configured to generate the first image data and the second image data and control the first gamma reference voltage of the first display panel or the second gamma reference voltage of the second display panel, on the basis of a difference between the first gamma reference voltage and the second gamma reference voltage,
• wherein the first display panel is configured to instruct the second display panel to change the second gamma reference voltage used by the second display panel when the second gamma reference voltage used by the second display panel is less than the first gamma reference voltage used by the first display panel, or
• wherein the second display panel is configured to instruct the first display panel to change the first gamma reference voltage used by the first display panel when the first gamma reference voltage used by the first display panel is less than the second gamma reference voltage used by the second display panel.

An image display method comprising:

• comparing, by a first display panel, a first gamma reference voltage that is used in the first display panel with a second gamma reference voltage that is used in a second display panel physically separated from the first display panel, wherein the first display panel emits first image light for a first eye of a user, and the second display panel emits second image light for a second eye of the user;
• changing, by the first display panel, the first gamma reference voltage used in the first display panel when the first gamma reference voltage used in the first display panel is less than the second gamma reference voltage used in the second display panel;
• and
• instructing, by the first display panel, the second display panel to change the second gamma reference voltage used in the second display panel when the second gamma reference voltage used in the second display panel is less than the first gamma reference voltage used in the first display panel.