Samsung patents glasses that sync two screens to prevent visual lag

1. A head-wearable electronic device comprising: a head-wearable housing structure; a display assembly including a first display and a second display respectively positioned over eyes of a user wearing the head-wearable housing structure; first display driver circuitry connected to the first display; second display driver circuitry connected to the second display; memory comprising one or more storage media storing instructions; and at least one processor comprising processing circuitry, wherein the instructions, when executed by the at least one processor, cause the at least one processor to: transmit a command at a first timing to the first display driver circuitry; and transmit the command at a second timing to the second display driver circuitry, wherein the first display driver circuitry is configured to: based on receiving the command transmitted at the first timing from the processor: transmit, to the second display driver circuitry, a first signal indicating a reception of the command, and defer controlling of the first display according to the command until a second signal indicating a reception of the command is received from the second display driver circuitry; and synchronize the controlling of the first display according to the command with controlling of the second display according to the command by executing the controlling of the first display according to the command based on: transmitting, to the second display driver circuitry, the first signal in response to receiving the command transmitted at the first timing from the processor, and receiving the second signal transmitted from the second display driver circuitry in response to receiving the command transmitted at the second timing from the processor.