Display device and method of driving the same

Abstract

The present invention provides a display device and a method of driving the same. The display device includes: a light-emitting device; a first capacitor connected between a first contact point and a second contact point; a driving transistor including an input terminal connected to a first voltage, an output terminal, and a control terminal connected to the second contact point; a first switching transistor controlled by a first control signal and connected between a data voltage and the first contact point; a second switching transistor controlled by a second control signal and connected between a second voltage and the first contact point; a third switching transistor controlled by a third control signal and connected between the second contact point and the second voltage; a fourth switching transistor controlled by the first control signal and connected between the second contact point and the output terminal of the driving transistor; and a fifth switching transistor controlled by the second control signal and connected between the light-emitting device and the output terminal of the driving transistor.

1 . A display device, comprising:
 a light emitting element;   a first capacitor connected between a first contact point and a second contact point;   a driving transistor comprising an input terminal connected to a first voltage, an output terminal, and a control terminal, the control terminal connected to the second contact point;   a first switching transistor controlled by a first control signal and connected between a data voltage and the first contact point;   a second switching transistor controlled by a second control signal and connected between a second voltage and the first contact point;   a third switching transistor controlled by a third control signal and connected between the second contact point and the second voltage;   a fourth switching transistor controlled by the first control signal and connected between the second contact point and the output terminal of the driving transistor; and   a fifth switching transistor controlled by the second control signal and connected between the light emitting element and the output terminal of the driving transistor.   
   
   
       2 . The display device of  claim 1 , wherein the first switching transistor, the third switching transistor, and the fourth switching transistor respectively comprise a different channel-type electric field effect transistor from the second switching transistor, the fifth switching transistor, and the driving transistor. 
   
   
       3 . The display device of  claim 2 , wherein the first switching transistor, the third switching transistor, and the fourth switching transistor are n-channel electric field effect transistors. 
   
   
       4 . The display device of  claim 3 , wherein the second switching transistor, the fifth switching transistor, and the driving transistor are p-channel electric field effect transistors. 
   
   
       5 . The display device of  claim 4 , wherein the first switching transistor, the second switching transistor, the third switching transistor, the fourth switching transistor, and the fifth switching transistor and the driving transistor comprise polysilicon. 
   
   
       6 . The display device of  claim 1 , wherein, in a first period, a second period, a third period, a fourth period, and a fifth period, the periods being sequentially formed:
 the first switching transistor, the second switching transistor, the third switching transistor, the fourth switching transistor, and the fifth switching transistor are turned off for the first period;   the first switching transistor, the third switching transistor, and the fourth switching transistor are turned on, and the second switching transistor and the fifth switching transistor are turned off for the second period;   the first switching transistor and the fourth switching transistor are turned on, and the second switching transistor, the third switching transistor, and the fifth switching transistor are turned off for the third period;   the first switching transistor, the second switching transistor, the third switching transistor, the fourth switching transistor, and the fifth switching transistor are turned off for the fourth period; and   the second switching transistor and the fifth switching transistor are turned on, and the first switching transistor, the third switching transistor, and the fourth switching transistor are turned off for the fifth period.   
   
   
       7 . The display device of  claim 6 , wherein the light emitting element does not emit light for the first period, the second period, the third period, and the fourth period, and the light emitting element emits light for the fifth period. 
   
   
       8 . The display device of  claim 7 , wherein the sum of the first period, the second period, the third period, the fourth period, and the fifth period is one frame. 
   
   
       9 . The display device of  claim 8 , wherein the fifth period is half the one frame. 
   
   
       10 . The display device of  claim 1 , wherein each of the third switching transistor and the fourth switching transistor comprise a control terminal, an output terminal, and an input terminal, and the control terminals of the third switching transistor and the fourth switching transistor respectively comprise a plurality of protruding portions. 
   
   
       11 . The display device of  claim 1 , wherein each of the first switching transistor and the second switching transistor comprise a control terminal, an output terminal, and an input terminal, and
 the control terminals of the first switching transistor, the second switching transistor, and the driving transistor respectively comprise a plurality of protruding portions.   
   
   
       12 . The display device of  claim 11 , wherein the fifth switching transistor comprises a control terminal, an output terminal, and an input terminal, and the control terminal of the fifth switching transistor comprises a plurality of protruding portions. 
   
   
       13 . A method of driving a display device comprising a light emitting element, a capacitor connected between a first contact point and a second contact point, and a driving transistor comprising an input terminal, an output terminal, and a control terminal, the control terminal connected to the second contact point, the method comprising:
 disconnecting the output terminal of the driving transistor, the second contact point, and the light emitting element from each other;   connecting a data voltage to the first contact point and connecting the second contact point to the output terminal of the driving transistor;   connecting a second voltage to the second contact point;   disconnecting the second contact point from the second voltage;   disconnecting the output terminal of the driving transistor from the second contact point and disconnecting the first contact point from the data voltage; and   connecting the second voltage to the first contact point and connecting the light emitting element to the output terminal of the driving transistor.   
   
   
       14 . The method of  claim 13 , wherein connecting the second voltage to the first contact point and connecting the light emitting element to the output terminal of the driving transistor is performed for half a frame. 
   
   
       15 . A display device, comprising:
 a substrate;   a first semiconductor, a second semiconductor, a third semiconductor, a fourth semiconductor, a fifth semiconductor, and a sixth semiconductor arranged on the substrate;   a gate insulating layer arranged on the first semiconductor, the second semiconductor, the third semiconductor, the fourth semiconductor, the fifth semiconductor, and the sixth semiconductor;   a first control terminal, a second control terminal, a third control terminal, a fourth control terminal, a fifth control terminal, a sixth control terminal, and a sustain electrode arranged on the gate insulating layer;   an interlayer insulating film arranged on the first control terminal, the second control terminal, the third control terminal, the fourth control terminal, the fifth control terminal, and the sixth control terminal;   an electrode member opposite to a first input terminal, a second input terminal, a third input terminal, a fourth input terminal, a fifth input terminal, and a sixth input terminal, a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, a fifth output terminal, a sixth output terminal, and the sustain electrode, which are respectively arranged on the interlayer insulating film;   a passivation layer arranged on the first input terminal, the second input terminal, the third input terminal, the fourth input terminal, the fifth input terminal, and the sixth input terminal and the first output terminal, the second output terminal, the third output terminal, the fourth output terminal, the fifth output terminal, and the sixth output terminal;   a pixel electrode arranged on the passivation layer and connected to the fifth output terminal;   a partition arranged on the pixel electrode, the partition comprising an opening exposing a portion of the pixel electrode;   a light emitting member arranged in the opening;   a common electrode arranged on the light emitting member and the partition; and   a capacitor connected between a first contact point and a second contact point,   wherein the first output terminal and the second output terminal are connected to each other at the first contact point, and the third output terminal, the fourth input terminal, and the sixth control terminal are connected to each other at the second contact point, and at least one of the first control terminal and the second control terminal comprise a plurality of protruding portions.   
   
   
       16 . The display device of  claim 15 , wherein at least one of the third control terminal, the fourth control terminal, and the fifth control terminal comprise a plurality of protruding portions. 
   
   
       17 . The display device of  claim 15 , wherein the first control terminal and the fourth control terminal are connected to each other, and the second control terminal and the fifth control terminal are connected to each other. 
   
   
       18 . The display device of  claim 15 , wherein the fourth output terminal, the fifth input terminal, and the sixth output terminal are connected to each other.