Disclosed herein is a display device that allows a vertical scanning line to be shared between a plurality of rows without increasing the number of control lines or control signals, the display device including pixel circuits; vertical scanning lines; and horizontal scanning lines.
1. A display device comprising:
a horizontal scanning section configured to supply signal potentials to signal lines, the signal potentials including video signal potentials;
pixel circuits arranged in rows and columns, a plurality of the pixel circuits being grouped into groups of k rows, k>2, respective ones of the pixel circuits including a storage capacitor, a first sampling transistor and a second sampling transistor that are cascaded and together control writing of the signal potentials from one of the signal lines to the storage capacitor, a driving transistor that generates a driving current based on a voltage held in the storage capacitor, and an electrooptic element connected to an output terminal of the driving transistor;
a vertical scanning section configured to supply vertical scanning pulses for vertical scanning of the pixels circuits to row scanning lines that include writing scanning lines and power supply scanning lines,
wherein each of the writing scanning lines corresponds to one of the groups and is connected in common to a gate electrode of the first sampling transistor of each of the pixel circuits of the corresponding group,
each power supply scanning line corresponds to one of the groups and controls supply of power to the driving transistor of each of the pixel circuits of one or more rows of the respective corresponding group,
for each of the groups: a gate electrode of the second sampling transistor of each of the pixel circuits in one of the k rows of the respective group is connected to one of the power supply scanning lines that corresponds to a different one of the groups than the respective group and a gate electrode of the second sampling transistor of each of the pixel circuits in one of the other k rows of the respective group is connected to one of the writing scanning lines that corresponds to another different one of the groups than the different one of the groups and the respective group, and
the vertical scanning section supplies the vertical scanning pulses to the row scanning lines such that a threshold correction operation is performed in each of the pixel circuits, and, for each of the pixel circuits, a delay between a last threshold correction operation for the respective pixel circuit in a given period and a video signal writing operation for the respective pixel circuit in the given period is the same in each of the pixel circuits.
2. The display device of claim 1 ,
wherein the vertical scanning section supplies vertical scanning pulses to the row scanning lines such that in each given period the threshold correction operation is performed the same number of times in each of the pixel circuits.
3. The display device of claim 1 ,
wherein the vertical scanning section supplies vertical scanning pulses to the row scanning lines such that in each given period a duration of an emission period of each of the pixel circuits is the same.
4. The display device of claim 1 ,
wherein each of the power supply lines controls supply of power to the respective driving transistors of all of the pixel circuits in the corresponding group.
5. The display device of claim 1 ,
wherein the horizontal scanning section line-sequentially supplies the video signal potentials to the signal lines for each row in order, and
the vertical scanning section supplies the vertical scanning pulses such that, when the video signal potentials for a given row are supplied to the signal lines, the first and second transistors of each pixel circuit of the given row are conductive and the second transistor of all of the other pixel circuits in the group that includes the given row are not conductive.
6. The display device of claim 1 ,
wherein the vertical scanning section supplies the vertical scanning pulses such that a pattern of display states of each of the pixel circuits is the same.
7. The display device of claim 1 ,
wherein an input terminal of the driving transistor of each of the pixel circuits is connected to one of the power supply scanning lines and the vertical scanning pulses include power supply pulses supplied to the power supply scanning lines, the power supply pulses including a driving voltage for producing the driving current in the driving transistors.
8. The display device of claim 1 ,
wherein each of the pixel circuits includes a current path between a driving voltage supply line and the electrooptic element of the respective pixel circuit via the driving transistor of the respective pixel circuit,
each of the pixel circuit includes a switching transistor interposed in the current path between the driving voltage supply line and the electrooptic element of the respective pixel circuit, and
the gate electrode of the switching transistor of each of the pixel circuits connected to one of the power supply scanning lines and the vertical scanning pulses include power supply pulses supplied to the power supply scanning lines, the power supply pulses including ON and OFF voltages for the switching transistors.
9. The display device of claim 1 ,
wherein the vertical scanning pulses include power supply pulses supplied to the power supply scanning lines, the power supply pulses switching between a first potential and a second potential, the first potential being supplied to the power supply scanning lines when the one or more rows that the respective power supply scanning line controls power supply to is driven to emit light, and
the vertical scanning section is configured to extinguish light emission of a given row by causing the first and second sampling transistors of the pixel circuits of the given row to conduct while a reference potential is supplied as the signal potential on the signal lines and while the first potential is supplied to the power supply scanning line that controls power supply to the given row.
10. The display device of claim 1 ,
wherein the vertical scanning pulses include power supply pulses supplied to the power supply scanning lines, the power supply pulses switching between a first potential and a second potential, the first potential being supplied to the power supply scanning lines when the one or more rows that the respective power supply scanning line controls power supply to is driven to emit light, and
the vertical scanning section is configured to perform the threshold correction operation for a given row by causing the first and second sampling transistors of the pixel circuits of the given row to conduct while a reference potential is supplied as the signal potential on the signal lines and while the first potential is supplied to the power supply scanning line that controls power supply to the given row.
11. An electronic apparatus comprising the display device of claim 1 .