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US 2007/0164967 A1Published application
Display device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorMitsuaki Osame
Life of this patent
Estimating the term…
Abstract
A display device is proposed in which scan line driver circuits are not disposed on opposite sides of a scan line, but one end of the scan line is driven by a scan line driver circuit, while the other end of the scan line is driven by a scan line auxiliary circuit which has a significantly smaller circuit scale and lower power consumption than the scan line driver circuit. The scan line auxiliary circuit is controlled with a selection pulse of the scan line or a signal of the scan line driver circuit, and is electrically connected to a fixed potential through a transistor. When a potential of the scan line is switched by the scan line driver circuit, the scan line auxiliary circuit operates so that the scan line is driven from its opposite ends.
Claims12
A display device comprising:
- a power supply line;
- a scan line driver circuit;
- a scan line having one end electrically connected to the scan line driver circuit;
- and
- a scan line auxiliary circuit electrically connected to the other end of the scan line, the scan line auxiliary circuit including at least one switching element,
- wherein the scan line is capable of being electrically connected to the power supply line through the switching element by controlling the switching element with a signal potential of the scan line.
3 more elements
A display device comprising:
- a power supply line;
- a scan line driver circuit;
- a scan line;
- and
- a switching element,
- wherein one end of the scan line is electrically connected to the scan line driver circuit;
- wherein the other end of the scan line is electrically connected to the power supply line through the switching element;
- and
- wherein the scan line is capable of being electrically connected to the power supply line by controlling the switching element with a signal potential of the scan line or a signal potential of the scan line driver circuit.
6 more elements
A display device comprising:
- a power supply line;
- a first scan line driver circuit;
- a second scan line driver circuit;
- a first scan line having one end electrically connected to the first scan line driver circuit;
- a second scan line having one end electrically connected to the second scan line driver circuit;
- and
- a scan line auxiliary circuit electrically connected to the other end of the first scan line, the scan line auxiliary circuit including at least one switching element,
- wherein the first scan line is capable of being electrically connected to the power supply line through the switching element by controlling the switching element with a signal potential of the first scan line and a signal potential of the second scan line which is supplied from the second scan line driver circuit.
5 more elements
A display device comprising:
- a power supply line;
- a first scan line driver circuit electrically connected to one end of a first scan line;
- a second scan line driver circuit electrically connected to one end of a second scan line;
- a current supply line;
- a light-emitting element;
- a scan line auxiliary circuit electrically connected to the other end of the first scan line, the scan line auxiliary circuit including at least one switching element;
- a driving transistor electrically connected in series between the current supply line and the light-emitting element;
- a storage capacitor, one electrode of which is electrically connected to a gate electrode of the driving transistor, and the other electrode of which is electrically connected to the current supply line;
- a reset transistor, a gate electrode of which is electrically connected to the first scan line, and one of a source electrode and a drain electrode of which is electrically connected to the current supply line;
- a switch transistor having a gate electrode electrically connected to the second scan line, the switch transistor being electrically connected between the other of the source electrode and the drain electrode of the reset transistor and one electrode of the storage capacitor;
- and
- a selection transistor having a gate electrode electrically connected to a data line, the selection transistor being electrically connected in series between the switch transistor and the first scan line,
- wherein the first scan line is capable of being electrically connected to the power supply line through the switching element, and a gate potential of the driving transistor is set equal to a potential of the power supply line, by controlling the switching element with a signal potential of the first scan line and a signal potential of the second scan line which is supplied from the second scan line driver circuit.
10 more elements
A display device comprising:
- a power supply line;
- a first scan line driver circuit electrically connected to one end of a first scan line;
- a second scan line driver circuit electrically connected one end of a second scan line;
- a first transistor;
- a second transistor;
- and
- an inverter,
- wherein the other end of the first scan line is electrically connected to an input terminal of the inverter;
- wherein a gate electrode of the first transistor is electrically connected to an output terminal of the inverter;
- wherein one of a source electrode and a drain electrode of the first transistor is electrically connected to the other end of the first scan line;
- wherein a gate electrode of the second transistor is electrically connected to one end of the second scan line or the second scan line driver circuit;
- wherein one of a source electrode and a drain electrode of the second transistor is electrically connected to the other of the source electrode and the drain electrode of the first transistor;
- and
- wherein the other of the source electrode and the drain electrode of the second transistor is electrically connected to the power supply line.
11 more elements
Dependencies are inferred from the claim text.