Abstract: A circuit for a flat panel display, capable of displaying images, is provided. The circuit includes an image storage block for storing the images to be displayed, a display and timing controller block controlling the display operation, an image pixel matrix containing a multitude of rows and columns arranged pixel elements. The circuit also includes one or more controlled row driver blocks, one or more controlled column driver blocks, and a pixel pre-charge mechanism for pre-charging the pixel elements employing a back to back pre-charge operation applied to a row and/or column drive activated pixel element display operation. The back to back pre-charge operation signifies that during every other operating sequence a pre-charge operation is replaced by an activated pixel element display operation.

Abstract: An anode driver chip and a cathode driver chip attached to an OLED device by means of anisotropic glue. The fine structure of the attachment means requires inspection to determine any resulting open and short conditions. The anode driver circuits comprise an output current detection that allows open circuit testing of the contact between the OLED device and the anode driver chip. The cathode driver circuits comprise a voltage detection circuit that allows both open and short circuit detection between cathode driver pads.

Abstract: A circuit for a flat panel display, capable of displaying images, is provided. The circuit includes an image storage block for storing the images to be displayed, a display and timing controller block controlling the display operation, an image pixel matrix containing a multitude of rows and columns arranged pixel elements. The circuit also includes one or more controlled row driver blocks, one or more controlled column driver blocks, and a pixel pre-charge mechanism for pre-charging the pixel elements employing a back to back pre-charge operation applied to a row and/or column drive activated pixel element display operation. The back to back pre-charge operation signifies that during every other operating sequence a pre-charge operation is replaced by an activated pixel element display operation.

Abstract: A new system including circuit and methods are given to realize a dynamic matching of current sources, which are arranged as arrays of sets of current sources with added piecewise switchable trim bit transistors. The matching is achieved during an programmed calibration and trimming step by switching ON/OFF certain trim bit transistors until a required accuracy compared to a master reference is reached. The accuracy of the current source trimming is purely a function of the LSB size, and the trim range a function of the number of trim bits. Applying these new principles the drawbacks with regard to chip space and cost of prior art solutions can be overcome. Making use of modern chip manufacturing technologies allows for a very flexible and adaptive production of large arrays of current sources, as e.g. used in driver ICs for OLED displays.