Display apparatus

Computer graphics processing and selective visual display system – Display driving control circuitry

Reexamination Certificate

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Reexamination Certificate

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07453450

ABSTRACT:
A liquid crystal display apparatus is constituted whereby multiple source driver circuits provided with a driver IC are connected to the periphery of a liquid crystal display panel, and power supply voltages supplied from the outside are sequentially supplied from a specific source driver circuit to an adjacent source driver circuit, and a wire resistance calculation wire is formed for the driver IC in the voltage supply direction upstream, and is approximately equivalent to the signal wires extending from the upstream driver IC to the adjacent driver IC in the voltage supply direction downstream. The driver IC calculates the wire resistance by impressing a certain calculated voltage to one end of the wire resistance calculation wire, and then detects the voltage on the other end, calculates the amounts of the drop in voltage level based on the calculated wire resistance, and outputs the power supply voltages increased by the calculated respective amounts of the voltage drop to the downstream driver IC. Accordingly, a display apparatus is provided for preventing a drop in the power supply voltages sequentially supplied, thereby inhibiting malfunctioning of the driver ICs, resulting in improved display quality.

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patent: 6384805 (2002-05-01), Takada
patent: 6937233 (2005-08-01), Sakuma et al.
patent: 6982706 (2006-01-01), Doi et al.
patent: 7079123 (2006-07-01), Shino et al.
patent: 7126597 (2006-10-01), Shino et al.
patent: 2003/0234760 (2003-12-01), Lin et al.
patent: 2004/0183985 (2004-09-01), Taguchi
patent: 2006/0012744 (2006-01-01), Wang et al.
patent: 62-238684 (1987-10-01), None
patent: 2001-056481 (2001-02-01), None
patent: 2005048834 (2005-05-01), None

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