Electro-optical device having pixel circuit and driving circuit, driving method of electro-optical device and electronic apparatus
An electro-optical device includes a first storage capacitor that has a first electrode and a second electrode, and a second storage capacitor that has a third electrode and a fourth electrode, and a first pixel circuit. The first pixel circuit includes a first transistor having a first gate, a first drain, and a first source, an electro-optical element, a second transistor through which a first data line is electrically connected to the first gate during the second transistor is in an on-state, and a third transistor through which the first gate is electrically connected to the first drain or the first source. The second electrode and the third electrode are electrically connected to the first data line.
1. An electro-optical device comprising:
a scanning line;
a first data line;
a power source;
a feed line provided along the first data line and feeding a predetermined potential;
a first pixel circuit that are provided at a position corresponding to an intersection of the scanning line and the first data line; and
a driving circuit that drives the first pixel circuit, wherein the first pixel circuit includes:
a first transistor that has a first gate, a first drain, and a first source;
an electro-optical element;
a second transistor through which the first data line is electrically connected to the first gate during the second transistor is in an on-state, the second transistor having a second gate, a second drain, and a second source; and
a third transistor that has a third gate, a third drain, and a third source and through which the first gate is electrically connected to the first drain or the first source,
the first transistor controlling an electrical connection between the power source and the electro-optical element through the first transistor, the driving circuit including:
a first storage capacitor that has a first electrode and a second electrode; and
a second storage capacitor that has a third electrode and a fourth electrode,
the second storage capacitor holding a potential of the first data line,
the second electrode and the third electrode being electrically connected to the first data line,
the second storage capacitor being formed between the first data line and the feed line, and
capacitance of the second storage capacitor being larger than capacitance of the first storage capacitor.
2. The electro-optical device according to claim 1 ,
the first electrode being configured such that a voltage of the first electrode is set to a first voltage during at least a part of a first period in which the second transistor and the third transistor are in an on-state.
3. The electro-optical device according to claim 2 ,
the first electrode being configured such that a voltage of the first electrode is set to a second voltage according to a gray-scale level during at least a part of a second period after the first period.
4. The electro-optical device according to claim 3 , the driving circuit further including a third storage capacitor and a first switch,
the driving circuit being configured such that:
the third storage capacitor holds the second voltage before the second period, and
the first electrode is electrically connected to the third storage capacitor through the first switch during at least a part of the second period.
5. An electronic apparatus including the electro-optical device according to claim 4 .
6. The electro-optical device according to claim 3 , the driving circuit further including a third storage capacitor and a first switch,
the driving circuit being configured such that:
the third storage capacitor holds the second voltage during at least a part of the first period and a third period before the first period, and
the first electrode is electrically connected to the third storage capacitor through the first switch during at least a part of the second period.
7. The electro-optical device according to claim 3 , further including:
a second data line, and
a second pixel circuit that are provided at a position corresponding to an intersection of the scanning line and the second data line, the driving circuit further including:
a third storage capacitor;
a first switch;
a fourth storage capacitor that has a fifth electrode and a sixth electrode;
a fifth storage capacitor that has a seventh electrode and a eighth electrode, the fifth storage capacitor holding a potential of the one data line;
a sixth storage capacitor;
a second switch;
a third switch having a first input end; and
a fourth switch having a second input end connected to the first input end,
the sixth electrode and the seventh electrode being electrically connected to the second data line,
the driving circuit being configured such that:
the third storage capacitor holds the second voltage supplied through the third switch before the second period;
the sixth storage capacitor holds a third voltage supplied through the fourth switch before the second period;
the first electrode is electrically connected to the third storage capacitor through the first switch during at least a part of the second period; and
the fifth electrode is electrically connected to the sixth storage capacitor through the second switch during at least a part of the second period.
8. The electro-optical device according to claim 7 ,
the driving circuit being configured such that:
the third switch is turned on during a period different from a period which the fourth switch is turned on;
the first switch and the second switch are turned on simultaneously.
9. The electro-optical device according to claim 3 ,
the driving circuit being configured such that:
the second transistor is turned on in the second period; and
the third transistor is turned off in the second period.
10. The electro-optical device according to claim 3 ,
the second electrode being configured such that a voltage of the second electrode is set to a fourth voltage during at least a part of a third period before the first period.
11. An electronic apparatus including the electro-optical device according to claim 3 .
12. An electronic apparatus including the electro-optical device according to claim 2 .
13. The electro-optical device according to claim 1 , wherein
the first pixel circuit includes a fourth transistor through which the feed line is electrically connected to one electrode of the light emitting element.
14. The electro-optical device according to claim 13 , wherein
the fourth electrode end of the second storage capacitor is connected to the feed line.
15. The electro-optical device according to claim 1 ,
the electro-optical device being configured such that:
a first voltage is supplied to the first electrode through a first switching element included in the driving circuit during at least a part of a first period and a third period before the first period;
a fourth voltage is supplied to the second electrode through a second switching element included in the driving circuit during at least a part of the third period; and
a voltage of the first electrode is set to a second voltage according to a gray-scale level during at least a part of a second period in which the first switching element and the second switching element are in an off-state.
16. The electro-optical device according to claim 15 ,
the electro-optical device being configured such that:
a threshold voltage of the first transistor is compensated during the first period in which the voltage of the second electrode shifts from the fourth voltage to a fifth voltage.
17. The electro-optical device according to claim 1 , wherein
the first pixel circuit includes a fifth transistor having one end connected to one of the first drain and the first source, another end connected to one electrode of the light emitting element.
18. An electronic apparatus including the electro-optical device according to claim 1 .
19. A driving method of an electro-optical device, the electro-optical device including:
a scanning line;
a first data line;
a power source;
a first pixel circuit that are provided at a position corresponding to an intersection of the scanning line and the first data line; and
a driving circuit that drives the first pixel circuit, wherein the first pixel circuit includes:
a first transistor that has a first gate, a first drain, and a first source;
an electro-optical element;
a second transistor through which the first data line is electrically connected to the first gate during the second transistor is in an on-state, the second transistor having a second gate, a second drain, and a second source; and
a third transistor that has a third gate, a third drain, and a third source and through which the first gate is electrically connected to the first drain or the first source, the driving circuit including:
a first storage capacitor that has a first electrode and a second electrode electrically connected to the first data line; and
a second storage capacitor that has a third electrode electrically connected to the first data line and a fourth electrode, the driving method comprising:
setting a voltage of the first electrode to a first voltage during at least a part of a first period in which the second transistor and the third transistor are in an on-state;
setting a voltage of the first electrode to a second voltage according to a gray-scale level during at least a part of a second period after the first period; and
controlling an electrical connection between the power source and the electro-optical element through the first transistor, wherein
the second storage capacitor is formed between the first data line and the feed line, and
capacitance of the second storage capacitor is larger than capacitance of the first storage capacitor.