Patent ID: 6914632

Claim:
An apparatus for panning a window in CMOS image sensor having a pixel array consisted of a plurality of unit pixels and a row driving part for driving a row of the pixel array according to a row address, the apparatus comprising: an address generating part for generating a row address and a column address for panning, wherein the row address for panning is sum of a row start address and window height for panning and the column address for panning is sum of a column start address and window width for panning; an analog-digital converting part for receiving analog pixel data of the row selected by the row driving part and converting the analog pixel data to digital pixel data; and a line buffering part for receiving the digital pixel data outputted from the analog-digital converting part and selectively outputting one among the digital pixel data according to the column address, wherein the line buffering part includes: a first line buffer for storing digital pixel data outputted from the analog-digital converting part according to a first write enable signal; a second line buffer for storing digital pixel data outputted from the analog-digital converting part according to second write enable signal; and a third selector enabled by a read enable signal for selecting and outputting the pixel data stored in the first or the second line buffer according to the column address commonly connected to both the first and the second line buffers.