Electronic element, current control device, arithmetic device, and display device

A display device for performing display in accordance with a change of current between electrodes formed on one of two substrates disposed in an opposing manner, the display device comprising:

• an electronic element used for pixel switching or pixel driving, including:
• a substrate;
• a first electrode layer formed on a portion of the substrate;
• an insulating layer formed on the first electrode layer;
• a floating island-like conductive layer where a voltage control device for applying a voltage is not disposed thereon, the conductive layer being formed on the insulating layer formed on an area where the first electrode layer is formed;
• a second electrode layer formed on one area where the first electrode layer on the substrate is not formed;
• a third electrode layer formed on the other area where neither the first electrode layer on the substrate nor the second electrode layer is formed;
• a semiconductor layer formed so as to cover between the conductive layer and the second electrode layer and to cover between the conductive layer and the third electrode layer;
• a first voltage control device for applying a voltage to the first electrode layer;
• a second voltage control device for applying a voltage to the second electrode layer and the third electrode layer;
• and
• a current control unit regulating a direction of carriers upon applying the voltage using the second voltage control device such that the carriers are directed from the second electrode layer to the third electrode layer via the floating island-like conductive layer where the voltage control device is not disposed thereon.

An electronic element comprising:

• a substrate;
• a first electrode layer formed on a portion of the substrate;
• an insulating layer formed on the first electrode layer;
• a semiconductor layer formed so as to cover the first electrode layer on which the insulating layer is formed;
• a floating island-like conductive layer where a voltage control device for applying a voltage is not disposed thereon, the conductive layer being formed on the insulating layer formed on an area where the first electrode layer is formed;
• a second electrode layer formed on one area where the first electrode layer on the substrate is not formed;
• a third electrode layer formed on another area where neither the first electrode layer on the substrate nor the second electrode layer is formed;
• a first voltage control device for applying a voltage to the first electrode layer;
• a second voltage control device for applying a voltage to the second electrode layer and the third electrode layer;
• and
• a current control unit regulating a direction of carriers upon applying the voltage using the second voltage control device such that the carriers are directed from the second electrode layer to the third electrode layer via the floating island-like conductive layer where the voltage control device is not disposed thereon.