Patent ID: 6756958
Filing Date: 2004-06-29
Classification: G09G

Abstract:
A display device, comprising:a display panel for displaying a tone in correspondence with a potential difference between a drain voltage and a common voltage which are applied to a plurality of switching elements, a drain driver circuit for generating said drain voltage corresponding to said display data and applying said drain voltage to said display panel, a gate driver circuit for selecting a scanning line in said display panel to which said drain voltage is applied, and a power-supply circuit for executing a comparative calculation of a reference common voltage and a feedback common voltage so as to apply said common voltage to said display panel, said reference common voltage having an adjustable potential level, said feedback common voltage being fedback from said display panel, and said common voltage being obtained as a result of said comparative calculation, wherein, if said drain voltage is in phase with said common voltage, a gate-off voltage applied at a section of pixels of said display panel is in phase with said drain voltage and said common voltage at the section of pixels of said display panel, and, if said drain voltage is in opposite phase to said common voltage, said gate-off voltage applied at the section of pixels of said display panel has an intermediate potential between said drain voltage and said common voltage at the section of pixels of said display.