Patent ID: 7453450
Filing Date: 2008-11-18
Classification: G09G

Abstract:
1. A display apparatus configured in such manner that a plurality of adjacent driver circuits, each mounting a driver IC on a circuit board are connected to the periphery of a display panel, said adjacent driver circuits being connected to each other by a connection wire formed on the said display panel, while a power supply voltage required for driving the said driver ICs and the said display panel is supplied from an external control circuit to at least one of the said driver circuits, and sequentially supplied from one of the said driver circuits to the driver circuit adjacent thereto, wherein: a wire resistance calculation wire is formed for the said driver IC upstream in the voltage supply direction, and is approximately equivalent to a signal wire extending downstream from the said driver IC to the said driver IC on the driver circuit adjacent thereto in the voltage supply direction, and the said upstream driver IC calculates the wire resistance by impressing a certain calculated voltage on one end of the said wire resistance calculation wire, and then detects the voltage of the other end, calculates the drop in voltage level based on the calculated wire resistance, and outputs the power supply voltage increased by the calculated amount of the voltage drop to the said downstream driver circuit.