| 摘要 |
PURPOSE:To enable to remove smear component contained in a signal component by providing a vertical CCD register that carries false signal charge near a vertical CCD shift register for signal transfer and taking the difference between the two registers. CONSTITUTION:When light enters to a solid state image pickup element, the light entered under the photodiode generates photocharge 18 in a semiconductor substrate, and the charge is accumulated in junction capacity formed by the photodiode. On the other hand, a shading film etc. is provided on electrodes 8'-1, 8'-2. However, even when light is sheltered, leaking light exists in the area, and photocharge 19 (19-A, 19-B) is generated by leaking light. Charge 19 enters a vertical register 10 for signal transfer and generates smear, and the charge also enters a vertical register 16 adjoining to the register 10. Consequently, the register 10 carries signal charge Q including smear charge S' (total Q+S'), and the register 16 carries smear charge S. By taking the difference between the two signals, a true light signal Q from which only smear component is removed can be obtained. |
