Transistor circuit, display panel and electronic apparatus

Abstract

A transistor circuit is provided including a driving transistor where conductance between the source and the drain is controlled in response to a supplied voltage, and a compensating transistor where the gate is connected to one of the source and the drain, the compensating transistor being connected so as to supply input signals to the gate of the driving transistor through the source and drain. In a transistor circuit where conductance control in a driving transistor is carried out in response to the voltage of input signals, it is possible to control the conductance by using input signals of a relatively low voltage and a variance in threshold characteristics of driving transistors is compensated. With this transistor circuit, a display panel that can display picture images with reduced uneven brightness is achieved.

1 . A driving method for a display having a transistor circuit that includes a light-emitting element and a driving transistor controlling a current flowing through the light-emitting element, the method comprising:
 setting a gate voltage of the driving transistor to a predetermined voltage,   compensating a data signal for a threshold voltage of the driving transistor when the data signal is supplied to the transistor circuit;   setting the gate voltage of the driving transistor to a compensated voltage obtained by the compensating; and   controlling the current flowing through the light-emitting element by the driving transistor.   
     
     
         2 . A driving method for a display including a scanning line, a data line, and a pixel including a light-emitting element and a transistor circuit including a driving transistor controlling a current flowing through the light-emitting element, and a switching transistor connected between the data line and the driving transistor, the method comprising:
 setting a gate voltage of the driving transistor to a predetermined voltage in a first period,   compensating a data signal for a threshold voltage of the driving transistor when the switching transistor is turned on based on a scanning signal supplied from the scanning line, for supplying the data signal to a gate of the driving transistor from the data line in a second period;   setting the gate voltage of the driving transistor to a compensated voltage obtained by the compensating; and   controlling the current flowing through the light-emitting element by the driving transistor in a third period.   
     
     
         3 . The driving method according to  claim 2 , the data signal being supplied to a gate of the driving transistor through a diode connected transistor. 
     
     
         4 . The driving method according to  claim 2 , the third period having a duration longer than a duration of the first period. 
     
     
         5 . The driving method according to  claim 2 , the predetermined voltage being lower than a lowest voltage of the data signal. 
     
     
         6 . The driving method according to  claim 2 , the transistor circuit including a reset transistor electrically connected to the gate of the driving transistor, the reset transistor supplying the predetermined voltage when the reset transistor is turned on,
 the reset transistor being turned on in the first period and the switching transistor being turned off in the first period.