Display apparatus
A display apparatus includes pixels two-dimensionally arranged. Each of the pixels includes a light-emitting element, a capacitor which retains a voltage of a data signal, a drive transistor which feeds a current according to the voltage of the data signal to the light-emitting element, a first write transistor connected between a data signal line and a gate electrode of the drive transistor, a second write transistor connected between the first write transistor and a gate electrode of the drive transistor, and a counter transistor including a source electrode and a drain electrode, one of the source electrode and the drain electrode being connected between the first write transistor and the second write transistor. The other of the source electrode and the drain electrode of the counter transistor is connected to a counter voltage line which feeds a counter voltage.
1. A display apparatus, comprising:
pixels two-dimensionally arranged, wherein
each of the pixels includes:
a light-emitting element;
a capacitance element which retains a first voltage fed through a signal line;
a drive transistor which feeds a current according to the first voltage to the light-emitting element;
a first write transistor which includes a source electrode and a drain electrode and is connected between the signal line and a gate electrode of the drive transistor, one of the source electrode and the drain electrode being connected to the signal line;
a second write transistor connected between (i) an other of the source electrode and the drain electrode of the first write transistor and (ii) the gate electrode of the drive transistor; and
a counter transistor including a source electrode and a drain electrode, one of the source electrode and the drain electrode being connected between (iii) the other of the source electrode and the drain electrode of the first write transistor and (iv) one of a source electrode and a drain electrode of the second write transistor, an other of the source electrode and the drain electrode of the counter transistor being connected to a voltage line which feeds a second voltage,
the voltage line is disposed in each of pixel rows,
the display apparatus further comprises a controller which sets, for each pixel row of the pixel rows, the second voltage of the pixel row, based on the first voltage written to two or more pixels in the pixel row, and
the controller sets an intermediate voltage between the first voltage written to a first pixel which performs white display and the first voltage written to a second pixel which performs black display as the second voltage, the first pixel which performs the white display and the second pixel which performs the black display being included in the two or more pixels in the pixel row.
2. The display apparatus according to claim 1 ,
wherein the controller sets the second voltage to reduce a difference in potential between the first voltage and the second voltage, the first voltage being written to the two or more pixels of the pixel row.
3. The display apparatus according to claim 1 , wherein
the controller sets the second voltage identical among the pixels, based on the first voltage written to the two or more pixels.
4. The display apparatus according to claim 1 ,
wherein the controller maintains an on-state of the counter transistor during a period from an end of a write period for retaining the first voltage in the capacitance element to a start of an initialization period for initializing the drive transistor in each of the pixels.
5. The display apparatus according to claim 3 ,
wherein the controller maintains an on-state of the counter transistor during a period from an end of a write period for retaining the first voltage in the capacitance element to a start of an initialization period for initializing the drive transistor in each of the pixels.
6. A display apparatus, comprising:
pixels two-dimensionally arranged, wherein
each of the pixels includes:
a light-emitting element;
a capacitance element which retains a first voltage fed through a signal line;
a drive transistor which feeds a current according to the first voltage to the light-emitting element;
a first write transistor which includes a source electrode and a drain electrode and is connected between the signal line and a gate electrode of the drive transistor, one of the source electrode and the drain electrode being connected to the signal line;
a second write transistor connected between (i) an other of the source electrode and the drain electrode of the first write transistor and (ii) the gate electrode of the drive transistor; and
a counter transistor including a source electrode and a drain electrode, one of the source electrode and the drain electrode being connected between (iii) the other of the source electrode and the drain electrode of the first write transistor and (iv) one of a source electrode and a drain electrode of the second write transistor, an other of the source electrode and the drain electrode of the counter transistor being connected to a voltage line which feeds a second voltage,
the voltage line is disposed in each of pixel rows,
the display apparatus further comprises a controller which sets, for each pixel row of the pixel rows, the second voltage of the pixel row, based on the first voltage written to two or more pixels in the pixel row, and
the controller sets the second voltage based on the first voltage written to a first pixel which performs black display when among the two or more pixels in the pixel row, a proportion of the two or more pixels which perform the black display is higher than or equal to a first proportion, and sets the second voltage based on the first voltage written to a second pixel which performs white display when among the two or more pixels in the pixel row, a proportion of the two or more pixels which perform the white display is higher than or equal to a second proportion.