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 display panel comprising:
 a scanning line;   a data line; and   a transistor circuit including:   a light emitting element;   a driving transistor having a gate and controlling a current flowing through the light emitting element based on a gate voltage applied to the gate;   a switching transistor for supplying an input signal to the driving t transistor; and   a capacitor holding the gate voltage applied to the gate,   wherein the transistor circuit compensates the input signal based on a threshold of the driving transistor to produce the gate voltage applied to the gate.   
   
   
       2 . The display panel according to  claim 1 , wherein the capacitor is connected to the gate. 
   
   
       3 . The display panel according to  claim 1 , wherein the transistor circuit has a transistor for resetting the gate voltage. 
   
   
       4 . A display panel comprising:
 a scanning line;   a data line; and   a transistor circuit including:   a light emitting element;   a driving transistor having a gate and controlling a current flowing through the light emitting element based on a gate voltage applied to the gate;   a switching transistor for supplying an input signal to the driving transistor; and   a capacitor holding the gate voltage applied to the gate,   wherein the transistor circuit compensates the input signal based on a threshold of the driving transistor to produce the gate voltage held by the capacitor.   
   
   
       5 . A display panel comprising:
 a first transistor having a first gate;   a second transistor having a second gate; and   a light emitting element emitting a light in response to an input signal,   wherein the second gate is supplied with a gate voltage having a voltage level obtained by compensating the input signal supplied through the first transistor, based on a threshold of the second transistor.   
   
   
       6 . The display panel according to  claim 5 , further comprising:
 a capacitor holding the gate voltage, wherein   the capacitor is connected to the second gate.   
   
   
       7 . The display panel according to  claim 5 , further comprising a transistor for resetting the gate voltage.