Patent ID: 7079103

Claim:
A scan-driving circuit for realizing a partial display, the scan-driving circuit driving first to Nth scan lines (N is a natural number) of an electro-optical device having pixels specified by the first to Nth scan lines and first to Mth signal lines (M is a natural number), the first to Nth scan lines and the first to Mth signal lines intersecting each other, the scan-driving circuit comprising: a shift register which includes serially connected first to Nth flip-flops provided corresponding to the first to Nth scan lines and sequentially shifts a given pulse signal; a level converter circuit including first to Nth level shifter circuits which shift voltage levels of output nodes of the first to Nth flip-flops and output signals of the shifted voltage levels; a scan line drive circuit including first to Nth drive circuits which sequentially drive the first to Nth scan lines corresponding to logic levels of output nodes of the first to Nth level shifter circuits; a block select data holding circuit which holds block select data for designating a block in which scan lines are driven; and a bypass circuit which outputs one of shift input and shift output to a (P+1)th block based on the block select data set for the Pth block, the shift input being input to a front flip-flop in a Pth block (P is a natural number) which includes at least part of a first to Nth flip-flops which form the shift register, and shift output being output from a last flip-flop in the Pth block, the last flip-flop in the Pth block being coupled to a front flip-flop in the (P+1)th block, wherein, when the first to Nth scan lines are divided into blocks each of which includes a plurality of scan lines and selection of a display area of the partial display or a non-display area of the partial display is performed in units of the blocks, the scan line drive circuit sequentially drives scan lines in at least one of the blocks selected for the display area, and simultaneously drives at a given drive timing at least part of scan lines in at least one of the blocks selected for the non-display area, and wherein the scan line drive circuit drives scan lines in a block designated as a block in which scan lines are driven by the block select data, and simultaneously drives at least part of scan lines in a block designated as a block in which scan lines are not driven by the block select data at a given drive timing.