Current drive circuit and display

A current drive circuit comprising:

• a bias generator that includes:
• a first transistor in which a gate terminal and a drain terminal are connected together;
• a second transistor in which a source terminal is connected to said drain terminal of said first transistor and a gate terminal and a drain terminal are connected together;
• and
• a current supply that causes a reference current to flow to said second transistor;
• and
• a current output unit that includes:
• a third transistor in which a gate terminal is connected to said gate terminal of said first transistor;
• a fourth transistor in which a gate terminal is connected to said gate terminal of said second transistor;
• and
• a switch means that is provided between a drain terminal of said third transistor and a source terminal of said fourth transistor.

A display, comprising:

• organic EL elements that are arranged in a matrix;
• current drive circuits and scan circuits for causing drive currents to flow to said organic EL elements;
• and
• signal processing circuits for receiving image data signals as input, supplying graduation data signals to said current drive circuits, and supplying scan control signals to said scan circuits;
• and
• wherein said display is provided with a current drive circuit comprising:
• a current mirror circuit;
• a current source for applying reference current input to said current mirror circuit;
• a switch means to which output current of said current mirror circuit is applied;
• and
• a cascode circuit for supplying the output current of said switch means as a drive current.