| 摘要 |
<p>PURPOSE:To improve the picture quality by using a liquid crystal cell where a field effect transistor is arranged as a switch element at every picture element. CONSTITUTION:When the image light from an object is projected to the field effect transistor in each picture element, a leak current corresponding to the quantity of light is conducted, and the reduction value of a voltage held in each liquid crystal capacity is changed in accordance with the quantity of light. Therefore, the value of the charging current conducted to each liquid crystal capacity from a power supply terminal 26 through a signal detecting resistance 25 is changed in accordance with the quantity of light when a prescribed voltage +B is successively applied to the liquid crystal of respective picture elements at the image pickup time. Consequently, an image pickup output corresponding to the object is obtained from the connection point between the signal detecting resistance 25 and the field effect transistor in each picture element because of the voltage drop due to the resistance 25. Thus, the picture quality is improved.</p> |
