Patent ID: 8791992

Claim:
A content playback device comprising: a timing signal generation unit configured to generate a shutter control signal requesting the opening or closing of a shutter of a lens among one or more lenses of a pair of shutter glasses worn by a user viewing a display panel adapted to display content, and a backlight control signal requesting a backlight of the display panel to be turned on at least when the shutter is open; and a transmitter unit configured to transmit the shutter control signal to the shutter glasses, wherein the timing signal generation unit changes at least one of the timing of turning on the backlight or the timing of opening the shutter of the lens of the shutter glasses, and wherein the shutter control signal corresponds to the backlight control signal such that: (i) during a period of time the shutter of the lenses of the pair of shutter glasses are both open, and (ii) the backlight is turned on for at least a portion of the period of time.