Patent ID: 6297792
Filing Date: 2001-10-02
Classification: G09G

Abstract:
An apparatus for driving a liquid crystal display panel in a liquid crystal display apparatus in which a plurality of scanning lines to which a scanning signal is applied and a plurality of data lines to which a data signal is applied are arranged so as to form a matrix, said liquid crystal display apparatus having a plurality of pixels each formed of a liquid crystal and a two-terminal type non-linear element connected in series between the plurality of scanning lines and the plurality of data lines, said driving apparatus comprising:a scanning signal drive circuit that forms a scanning signal having a charging mode and a discharging mode, said charging mode having a first selecting voltage which makes said two-terminal type non-linear element conductive, said discharging mode having a precharge voltage which makes said two-terminal type non-linear element conductive and which is opposite in polarity to said first selecting voltage about a middle value of the data signal, and a second selecting voltage which is output subsequently to the precharge voltage and which is opposite in polarity to the precharge voltage about the middle value of the data signal,said scanning signal drive circuit that supplies the first selecting voltage of said charging mode in a first horizontal period, supplying the precharge voltage of said discharging mode in a first half of a second horizontal period one vertical period after said first horizontal period, and supplies the second selecting voltage of said discharging mode in a second half of the second horizontal period; anda data signal drive circuit that supplies, by timing based on a cycle of one horizontal period, the data signal for controlling a grayshade of each of said pixels in the period through which said first selecting voltage is supplied in the charging mode, and also supplies, by timing based on a cycle of one horizontal period, the data signal both in the first half and in the second half of said second horizontal period in which said precharge voltage and said second selecting voltage are supplied in the discharging mode.