Patent ID: 7391400

Claim:
A liquid crystal display device for performing display in a normally black mode, comprising: a liquid crystal panel including a plurality of pixels, each having a first electrode, a second electrode opposing the first electrode, and a vertical alignment type liquid crystal layer provided between the first electrode and the second electrode; and a drive circuit for supplying a driving voltage to the liquid crystal panel, wherein, the drive circuit is capable of, when displaying an intermediate gray scale level which is higher than a gray scale level displayed in a previous vertical scanning period, supplying to the liquid crystal panel an overshoot voltage OSV which is higher than a predetermined gray scale voltage corresponding to the intermediate gray scale level, and a rise transmittance Tr, defined as the transmittance when a time corresponding to one vertical scanning period has elapsed since a voltage corresponding to a highest gray scale level is applied in a black display state, and a decay transmittance Td, defined as the transmittance when a time corresponding to one vertical scanning period has elapsed since a voltage corresponding to a black display state is applied in a highest gray scale level displaying state, are prescribed so that: at least at a panel temperature of 40° C., the rise transmittance Tr is equal to or greater than 75% of the transmittance in the highest gray scale level displaying state, and the decay transmittance Td is equal to or less than 8% of the transmittance in the highest gray scale level displaying state, wherein, given that a just overshoot voltage JOSV T is defined as an overshoot voltage which causes, at a panel temperature T(° C.), the transmittance to reach a predetermined transmittance corresponding to the intermediate gray scale level within a time corresponding to one vertical scanning period, at a panel temperature T 1 below 40° C., the decay transmittance Td is greater than 4% and equal to or less than 8% of the transmittance in the highest gray scale level displaying state, and when displaying an intermediate gray scale level which is higher than a gray scale level displayed in a previous vertical scanning period, the drive circuit supplies an overshoot voltage OSV T1 which is lower than a just overshoot voltage JOSV T1 for the panel temperature T 1 .