Patent ID: 6930679

Claim:
A set of devices for driving display devices, wherein each of said driving devices comprises a serial buffer, a serial-data-in (SDI) pin to receive image data, a serial-data-out (SDO) pin to transfer image data, and a clock pin operable to selectively cause image and/or command and/or status data to be serially shifted in to and out from said serial buffer through said SDI pin and said SDO pin; and said driving devices are connected in cascade and sequentially defined as driving device 1 , driving device 2 , through driving device P- 1 , and driving device P, where P is an integer larger than 1; wherein: said SDI pin of said driving device 1 further receives command from an external controller, and said SDO pin thereof further transfers command and/or internal status of said driving device 1 ; said SDI pin of said driving device 2 further receives command and/or status from said SDO pin of said driving device 1 , and said SDO pin thereof further transfers command and/or internal status of said driving devices 1 and 2 ; Repeating the command and status transfer for the set of devices through P- 1 ; said SDI pin of said driving device P further receives command and/or status from said SDO pin of said driving device P- 1 ; and said clock pins are all commonly controlled by a set of synchronous signal sources.