Patent ID: 7446776
Filing Date: 2008-11-04
Classification: G09G

Abstract:
1. A circuit, forming a display interface chip, capable of realizing control and driver functions for Liquid Crystal Display (LCD) and Organic Light Emitting Diode (OLED) devices and communicating with an external information processing system, comprising: a Chip Controller block controlling all write, read and refresh operations within the circuit; a Graphic Display DRAM block implemented in DRAM technology; a Refresh Control block therefore; a Data Interface block which communicates with said external information processing system; a Control Input terminal as input into said Data Interface block; a Data Input/Output bus system connecting from said external information processing system to said Data Interface block; a Control Registers block; an internal bus system in order to bi-directionally connect said Chip Controller block with said Control Registers block, said Graphic Display DRAM block and said Data Interface block; a Display Control circuit block controlling said Common and Segment Drivers blocks together with said Refresh Control block and being controlled by said Chip Controller block whereby said Refresh Control block controls in turn said Graphic Display DRAM block and is being controlled itself by said Display Control circuit block; a Driver Supply terminal for connection of an external or internal power supply; output terminals for connecting the electrodes of said external display device; and a Common Drivers and a Segment Drivers block, driving all the respective electrodes of said external display device, whereby said Driver blocks are supplied with power from said Driver Supply terminal.