DEVICE AND METHOD FOR IMPROVED LED DRIVING
An electronic device comprises a display and a controller. The controller is configured to provide a first frequency refresh rate to the display. The controller is also configured to generate a control signal configured to control emission of a light emitting diode of a display pixel of the display at a second frequency based on whether the first frequency refresh rate of the display is less than a predetermined threshold value.
1 . A display pixel comprising:
a light-emitting diode;
a drive transistor coupled in series with the light-emitting diode;
a first emission transistor coupled in series with the drive transistor;
a second emission transistor coupled in series with the drive transistor;
a first switching transistor coupled between a first voltage line and a first terminal of the drive transistor;
a second switching transistor coupled between the first voltage line and an anode of the light-emitting diode; and
a third switching transistor coupled between a second voltage line and a second terminal of the drive transistor.
2 . The display pixel of claim 1 , wherein a first gate terminal of the first switching transistor receives a first control signal and a second gate terminal of the second switching transistor receives a second control signal different than the first control signal.
3 . The display pixel of claim 1 , wherein the second terminal of the drive transistor is a drain terminal.
4 . The display pixel of claim 1 , wherein the second voltage line is a data line.
5 . The display pixel of claim 1 , wherein the drive transistor is a silicon transistor.
6 . The display pixel of claim 1 , wherein the first and second emission transistors are silicon transistors.
7 . The display pixel of claim 1 , wherein the first and third switching transistors are silicon transistors.
8 . The display pixel of claim 1 , wherein the first and third switching transistors are p-type transistors.
9 . A display pixel comprising:
a light-emitting diode;
a drive transistor coupled in series with the light-emitting diode;
a first emission transistor coupled in series with the drive transistor;
a second emission transistor coupled in series with the drive transistor;
a first switching transistor coupled between a first voltage line and a first terminal of the drive transistor;
a second switching transistor coupled to a second terminal of the drive transistor; and
a third switching transistor coupled between a second voltage line and an anode of the light-emitting diode.
10 . The display pixel of claim 9 , wherein a first gate terminal of the second switching transistor receives a first control signal and a second gate terminal of the third switching transistor receives a second control signal different than the first control signal.
11 . The display pixel of claim 9 , wherein the second terminal of the drive transistor is a drain terminal.
12 . The display pixel of claim 9 , wherein the drive transistor is a silicon transistor.
13 . The display pixel of claim 9 , wherein the first and second emission transistors are silicon transistors.
14 . The display pixel of claim 9 , wherein the drive transistor, first emission transistor, and second emission transistor are p-type transistors.
15 . A display pixel comprising:
a light-emitting diode;
a drive transistor coupled in series with the light-emitting diode;
a first emission transistor coupled in series with the drive transistor;
a second emission transistor coupled in series with the drive transistor;
a first switching transistor coupled to a first node that is interposed between the drive transistor and the first emission transistor;
a second switching transistor coupled to a second node that is interposed between the drive transistor and an anode of the light-emitting diode; and
a third switching transistor coupled to a third node that is interposed between the drive transistor and the anode of the light-emitting diode.
16 . The display pixel of claim 15 , wherein a first gate terminal of the first switching transistor receives a first control signal and wherein a second gate terminal of the second switching transistor receives a second control signal different than the first control signal.
17 . The display pixel of claim 16 , wherein a third gate terminal of the third switching transistor receives the first control signal.
18 . The display pixel of claim 15 , wherein a first gate terminal of the first switching transistor and a second gate terminal of the third switching transistor receive a common control signal.
19 . The display pixel of claim 15 , wherein the drive transistor is a silicon transistor.
20 . The display pixel of claim 15 , wherein the first and second emission transistors are silicon transistors.