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Source Drivers with cascaded connection and diagnostic capability

IP.com Disclosure Number: IPCOM000013379D
Original Publication Date: 2000-Oct-01
Included in the Prior Art Database: 2003-Jun-18

Publishing Venue

IBM

Abstract

This invention provides the simple video data transfer method between the LCD controller and LCD X-drives. This method is to add the output ports of X-Driver for transfer the data from the controller to the next driver in order to avoid complex wiring from the controller to the each X-drivers ,EMI noise and signal quality degradations. This data output ports of X-driver enable to make cascade connection of all X-drivers, and to get the last data from the the end of X-drives for the diagnostics of data transfer system. This inventions are 1) X-Driver(Source Driver) which has the input/output port to make cascade connection. 2) Diagnostics mechanism using the X-drivers output port feedback. Most data transfer methods between the X-drivers and the controller are bus connection. In this case, it is not easy to increase the number of X-drivers controlled by one controller.