US 9,179,136 B2 · Method and system for synchronizing 3D shutter glasses to a television refresh rate

Abstract

A 3D shutter glasses device, coupled via a wireless link to a 3D video display device, maintains a slave clock synchronized with a master clock in the display device. The clocks may comprise Bluetooth clocks. The shutter glasses receive 3D frame display information and time information referenced to the master clock that corresponds to when frames are displayed. The shutter glasses control opening and closing of left and right shutters utilizing slave clock time and the received information. The received display information comprises left, right and/or blank frame pattern information, a frame pattern time interval, a frame refresh rate and a time offset for delaying opening and/or closing of shutters. The time information indicates master clock time when frames are displayed. The shutter glasses and the display maintain synchronization when display and/or time information updates are skipped. The shutter glasses may transmit information to the display device.

Claims24

Dependent claims

A method for communication in a 3D video viewing shutter device that is wirelessly coupled to a 3D video display device, the method comprising:

generating a slave clock based on a master clock generated in said 3D video display device;
maintaining synchronization of said slave clock with said master clock;
receiving, from said 3D video display device, a time interval associated with display of 3D video frames and a time offset with respect to said time interval for delaying opening and/or closing of left and/or right shutters of said 3D video viewing shutter device, said time interval being based upon a frame synchronization signal generated by said 3D video display device, said frame synchronization signal being at a positive value of a square wave indicating a left frame is to be displayed by said 3D video viewing shutter device or at a negative value of said square wave indicating a right frame is to be displayed by said 3D video viewing shutter device;
and
opening and/or closing said left and/or right shutters of said 3D video viewing shutter device to correspond to a time of said display of said 3D video frames based on said generated slave clock, said time interval, and said time offset.

2 more elements

A system for communication, the system comprising:

one or more processors and/or circuits for use in a 3D video viewing shutter device, said 3D video viewing shutter device being wirelessly coupled to a 3D video display device, wherein said one or more processors and/or circuits are configured to:
generate a slave clock based on a master clock generated in said 3D video display device;
maintain synchronization of said slave clock with said master clock;
receive, from said 3D video display device, a time interval associated with display of 3D video frames and a time offset with respect to said time interval to delay opening and/or closing of left and/or right shutters of said 3D video viewing shutter device, said time interval being based upon a frame synchronization signal generated by said 3D video display device, said frame synchronization signal being at a first value, corresponding to a positive rising edge of said frame synchronization signal, indicating a left frame is to be displayed by said 3D video viewing shutter device or at a second value indicating a right frame is to be displayed by said 3D video viewing shutter device;
and
open and/or close said left and/or right shutters of said 3D video viewing shutter device to correspond to a time of said display of said 3D video frames based on said generated slave clock, said time interval, and said time offset.

3 more elements

Dependencies are inferred from the claim text.

Method and system for synchronizing 3D shutter glasses to a television refresh rate

Life of this patent

Method and system for synchronizing 3D shutter glasses to a television refresh rate

Life of this patent

Abstract

Claims24