Electronic device comprising display, and method for driving display
An electronic device may include: a housing; a display which is viewed through at least a portion of the housing and which displays a screen image by using a plurality of pixels; a display driving circuit for providing, to the display, a data voltage an emission signal for driving each of the plurality of pixels; and a processor operationally connected to the display and the display driving circuit. The processor can be configured to set a first frame driven by the display, and the display driving circuit can be configured to set a first period in which the data voltage is supplied to a first transistor in each of the plurality of pixels and a second period in which the data voltage written in the first period is maintained and to change the initialization voltage to be supplied to the plurality of pixels in the second period. Various other embodiments identified from the specification are also possible.
1. An electronic device comprising:
a housing;
a display configured to display a screen via a plurality of pixels;
a display driving circuit configured to provide the display with a data voltage and an emission signal for driving each of the plurality of pixels, wherein each of the plurality of pixels is electrically connected with a first initialization line and a second initialization line; and
a processor operatively connected with the display driving circuit,
wherein the processor is configured to set a first frame that the display drives, and
wherein the display driving circuit is configured to:
set a first period in which the data voltage is supplied to a first transistor of each of the plurality of pixels and a second period in which the data voltage written in the first period is maintained;
supply a first voltage to the first initialization line in the first period and the second period; and
supply a second voltage to the second initialization line in the first period and supply a third voltage different from the second voltage to the second initialization line in the second period.
2. The electronic device of claim 1 , wherein each of the plurality of pixels includes:
a second transistor and a third transistor configured to supply the data voltage to a storage capacitor through the first transistor based on at least a first scan signal of the first frame;
a fourth transistor configured to initialize the data voltage to the first voltage; and
a seventh transistor configured to initialize a voltage across a light-emitting element of each of the plurality of pixels to the second voltage different from the first voltage, based on at least a third scan signal of a second frame being a next frame of the first frame.
3. The electronic device of claim 2 , wherein the display driving circuit is configured to drive the third transistor and the fourth transistor respectively based at least on a fourth scan signal and a fifth scan signal being separate scan signals.
4. The electronic device of claim 3 , wherein the first scan signal and the third scan signal are configured to transition from a high state to a low state in the first period and the second period, and
wherein the fourth scan signal and the fifth scan signal are configured to transition from the high state to the low state in the first period and to maintain the high state in the second period.
5. The electronic device of claim 1 , wherein the first transistor includes a driving transistor,
wherein the first period includes an address period, and
wherein the second period includes a holding period.
6. The electronic device of claim 1 , wherein the display driving circuit is configured to:
decrease a potential of the third voltage when a screen that the display displays in the second period is brighter than a screen that the display displays in the first period.
7. The electronic device of claim 1 , wherein the display driving circuit is configured to maintain the data voltage in a state of being biased with a DC voltage having a specified magnitude in the second period.
8. An electronic device comprising:
a housing;
a display configured to display a screen via a plurality of pixels, wherein each of the plurality of pixels is electrically connected with a first initialization line and a second initialization line;
a display driving circuit configured to provide the display with a data voltage and an emission signal for driving each of the plurality of pixels; and
a processor operatively connected with the display driving circuit,
wherein the processor is configured to set a frame that the display drives, and
wherein the display driving circuit is configured to:
set a first period in which the data voltage is supplied to a first transistor of each of the plurality of pixels and a second period in which the data voltage written in the first period is maintained;
supply a first voltage to the first initialization line in the first period and the second period;
supply a second voltage to the second initialization line in the first period and supply a third voltage different from the second voltage to the second initialization line in the second period; and
control a time during which the emission signal is provided in the second period.
9. The electronic device of claim 8 , wherein each of the plurality of pixels includes:
a second transistor configured to supply the data voltage to the first transistor based at least on a first scan signal of the frame;
a third transistor configured to maintain the data voltage supplied to the first transistor during the frame;
a fourth transistor configured to initialize the data voltage to the first voltage;
a fifth transistor configured to supply a high-potential reference voltage to a source electrode of the first transistor based at least on the emission signal in the frame;
a sixth transistor configured to supply a driving current to a light-emitting element of each of the plurality of pixels based on the emission signal in the frame; and
a seventh transistor configured to initialize a voltage across a light-emitting element of each of the plurality of pixels to the second voltage different from the first voltage, based on at least a third scan signal of a second frame being a next frame of the first frame.
10. The electronic device of claim 9 , wherein the third transistor and the fourth transistor each comprise an oxide thin.
11. The electronic device of claim 9 , wherein the display driving circuit is configured to drive the third transistor and the fourth transistor respectively based at least on a fourth scan signal and a fifth scan signal being separate scan signals.
12. The electronic device of claim 11 , wherein the first scan signal and a third scan signal are configured to transition from a high state to a low state in the first period and the second period, and
wherein the fourth scan signal and the fifth scan signal are configured to transition from the high state to the low state in the first period and to maintain the high state in the second period.
13. The electronic device of claim 8 , wherein the display driving circuit is configured to:
increase an emission signal width being a time during which the emission signal is provided in the second period, when luminance in the second period is lower than luminance in the first period.
14. The electronic device of claim 8 , wherein the display driving circuit is configured to adjust an on ratio of the emission signal in the second period for each frame.