A low-power sync processor with a floating-point timer and universal edge tracer for 3DTV active shutter glasses

A low-power sync processor chip for 3DTV shutter glasses has been proposed and implemented. The proposed sync processor adopts a newly designed floating point timer to synchronize without any sync reception and an edge tracer for universal sync-packet detection without running the CPU. The floating-point timer allows the input wireless sensor to be turned off, and the edge tracer enables the CPU to hibernate most of the time to reduce the current. The implemented chip uses less than about 25% of the operating current that major commercial shutter glasses use.