| 摘要 |
PURPOSE:To make it possible to reduce blooming and smears by transferring residual charges in a vertical register to a horizontal register in a blanking interval and further extracting them from the horizontal register. CONSTITUTION:In a vertical blanking interval, transfer gate 103 is placed in an OFF state, and transfer electrode 202 of horizontal register 203 opposing to vertical shift register 108 in an ON state to transfer charges from vertical register 108 to horizontal register 203. Next, charges are sent to output method 204 by driving horizontal register 203 to clear residual charges in vertical register 108. When charges are great in number, charges for a random number of stages in vertical register 108 are transferred to horizontal register 203, without causing horizontal register 203 to overflow, and temporarily sent to an output terminal, and horizontal register 203 is driven as many as the random number of stages to transfer the residual charges to horizontal register 203 before transfer to output method 204. Thus, blooming and smears can be reduced to half. |
