Display apparatus and driving method of pixel
Provided are a pixel configured to receive a first initialization voltage during a first period between a writing period of a first scan period and a first emission period of a frame and to receive a second initialization voltage different from the first initialization voltage from a start time point of a second period before a second emission period of a second scan period subsequent to the first scan period, a display apparatus including the pixel, and a driving method of the display apparatus.
1. A display apparatus comprising:
a plurality of pixels, each of the plurality of pixels comprising:
a light-emitting diode;
a first transistor electrically connected to a driving voltage line and the light-emitting diode;
a second transistor electrically connected to the first transistor and the light-emitting diode; and
a third transistor electrically connected to the light-emitting diode and an initialization voltage line, wherein
the pixel is configured to operate, during a frame, in a first scan period including a writing period for receiving a data signal and a first emission period for emitting light with luminance corresponding to the data signal and in a second scan period including a second emission period for maintaining the data signal and emitting light with luminance corresponding to the maintained data signal,
a gate of the second transistor is configured to receive a first gate signal of a gate-on voltage during the second scan period,
a gate of the third transistor is configured to receive a second gate signal of a gate-on voltage in a first period before the second emission period of the second scan period, and
the initialization voltage line is configured to receive a first initialization voltage during the first scan period and to receive a second initialization voltage different from the first initialization voltage from a start time point of the first period of the second scan period.
2. The display apparatus of claim 1 , wherein the gate of the second transistor is configured to receive another first gate signal of a gate-on voltage and the gate of the third transistor is configured to receive another second gate signal of a gate-on voltage in a second period between the writing period and the first emission period.
3. The driving apparatus of claim 2 , wherein
the pixel further comprises a fourth transistor electrically connected to a data line and a gate of the first transistor, and
a gate of the fourth transistor is configured to receive a third gate signal of a gate-on voltage in the writing period.
4. The display apparatus of claim 3 , wherein the pixel further comprises:
a fifth transistor electrically connected to the driving voltage line and the first transistor; and
a sixth transistor electrically connected to the gate of the first transistor and a reference voltage line,
wherein the gate of the second transistor is configured to receive a first gate signal of a gate-off voltage, a gate of the fifth transistor is configured to receive a fourth gate signal of a gate-on voltage, and a gate of the sixth transistor is configured to receive a fifth gate signal of a gate-on voltage in a third period before the writing period of the first scan period.
5. The display apparatus of claim 4 , wherein the gate of the fifth transistor is configured to receive another fourth gate signal of a gate-on voltage during the second emission period, and
the gate of the fifth transistor is configured to receive a fourth gate signal of a gate-off voltage during a period except for the second emission period, in the second scan period.
6. The display apparatus of claim 5 , wherein
the plurality of pixels comprise a first pixel emitting light of a first color and a second pixel emitting light of a second color, and
a second initialization voltage supplied to the first pixel and a second initialization voltage supplied to the second pixel are different from each other.
7. The display apparatus of claim 4 , wherein
the gate of the fifth transistor is configured to receive a fourth gate signal of a gate-on voltage during the second scan period.
8. The display apparatus of claim 7 , wherein
the plurality of pixels comprise a first pixel emitting light of a first color and a second pixel emitting light of a second color, and
a second initialization voltage supplied to the first pixel and a second initialization voltage supplied to the second pixel are different from each other.
9. The display apparatus of claim 1 , further comprising a power supply circuit configured to output the first initialization voltage to the plurality of pixels during the first scan period and to output the second initialization voltage from a start time point of the first period of the second scan period.
10. A display apparatus comprising:
a plurality of pixels, each of the plurality of pixels comprising:
a light-emitting diode;
a first transistor electrically connected to a driving voltage line and the light-emitting diode;
a second transistor electrically connected to the first transistor and the light-emitting diode; and
a third transistor electrically connected to the light-emitting diode and an initialization voltage line, wherein
the pixel is configured to operate, during a frame, in a first scan period including a writing period for receiving a data signal and a first emission period for emitting light with luminance corresponding to the data signal and in a second scan period including a second emission period for maintaining the data signal and emitting light with luminance corresponding to the maintained data signal,
a gate of the second transistor is configured to receive a first gate signal of a gate-on voltage during the second scan period, and
the initialization voltage line is configured to receive a first initialization voltage until before the first emission period of the first scan period and receive a second initialization voltage different from the first initialization voltage during the first emission period of the first scan period and the second scan period.
11. The display apparatus of claim 10 , wherein the gate of the second transistor is configured to receive another first gate signal of a gate-on voltage and a gate of the third transistor is configured to receive a second gate signal of a gate-on voltage in a first period between the writing period and the first emission period.
12. The display apparatus of claim 11 , wherein the pixel further comprises a fourth transistor electrically connected to a data line and a gate of the first transistor, and a gate of the fourth transistor is configured to receive a third gate signal of a gate-on voltage in the writing period.
13. The driving apparatus of claim 12 , wherein the pixel further comprises:
a fifth transistor electrically connected to the driving voltage line and the first transistor; and
a sixth transistor electrically connected to the gate of the first transistor and a reference voltage line,
wherein the gate of the second transistor is configured to receive a first gate signal of a gate-off voltage, a gate of the fifth transistor is configured to receive a fourth gate signal of a gate-on voltage, and a gate of the sixth transistor is configured to receive a fifth gate signal of a gate-on voltage in a second period before the writing period of the first scan period.
14. The display apparatus of claim 13 , wherein the gate of the fifth transistor is configured to receive a fourth gate signal of a gate-on voltage during the second emission period and to receive a fourth gate signal of a gate-off voltage during a period except for the second emission period, in the second scan period.
15. The display apparatus of claim 14 , wherein
the plurality of pixels comprise a first pixel emitting light of a first color and a second pixel emitting light of a second color, and
a second initialization voltage supplied to the first pixel and a second initialization voltage supplied to the second pixel are different from each other.
16. The display apparatus of claim 13 , wherein the gate of the fifth transistor is configured to receive a fourth gate signal of a gate-on voltage during the second scan period.
17. The display apparatus of claim 16 , wherein
the plurality of pixels comprise a first pixel emitting light of a first color and a second pixel emitting light of a second color, and
a second initialization voltage supplied to the first pixel and a second initialization voltage supplied to the second pixel are different from each other.
18. The display apparatus of claim 10 , further comprising a power supply circuit configured to output the first initialization voltage to the plurality of pixels until before the first emission period of the first scan period and output the second initialization voltage during the first emission period of the first scan period and the second scan period.
19. A driving method of a display apparatus comprising a plurality of pixels, each of the plurality of pixels comprising:
a light-emitting diode;
a first transistor electrically connected to a driving voltage line and the light-emitting diode;
a second transistor electrically connected to the first transistor and the light-emitting diode; and
a third transistor electrically connected to the light-emitting diode and an initialization voltage line, wherein
the pixel is configured to operate, during a frame, in a first scan period including a writing period for receiving a data signal and a first emission period for emitting light with luminance corresponding to the data signal and in a second scan period including a second emission period for maintaining the data signal and emitting light with luminance corresponding to the maintained data signal,
in each pixel,
receiving a first gate signal of a gate-on voltage to a gate of the second transistor and receiving a second gate signal of a gate-on voltage to a gate of the third transistor in a first period between the writing period and the first emission period of the first scan period,
receiving another first gate signal of a gate-on voltage to the gate of the second transistor during the second scan period,
receiving a second gate signal of a gate-on voltage to the gate of the third transistor in a second period before the second emission period in the second scan period, and
receiving a first initialization voltage during the first period of the first scan period and receiving a second initialization voltage different from the first initialization voltage to the initialization voltage line from a start time point of at least the second period of the second scan period.
20. The driving method of the display apparatus of claim 19 , wherein
the pixel further comprises a fifth transistor electrically connected to the driving voltage line and the first transistor, and
in each pixel, receiving a third gate signal of a gate-on voltage to a gate of the fifth transistor during the second emission period and receiving a third gate signal of a gate-off voltage to the gate of the fifth transistor during a period except for the second emission period, in the second scan period.