JP2006047984A5

JP2006047984A5 -

Info

Publication number: JP2006047984A5
Application number: JP2005148088A
Authority: JP
Filing date: 2005-05-20
Publication date: 2008-05-15
Anticipated expiration: 2025-05-20

Claims

A first light emitting element;
A first transistor electrically connected to the first light emitting element;
A second light emitting element;
A second transistor electrically connected to the second light emitting element;
A constant current source for supplying a constant current to the second light emitting element;
It includes a circuit for outputting a potential equal to the input potentials, and
A first electrode of the first light emitting element is electrically connected to one of a source and a drain of the first transistor;
A second electrode of the first light emitting element is electrically connected to a first power source;
A first electrode of the second light emitting element is electrically connected to one of a source and a drain of the second transistor;
A second electrode of the second light emitting element is electrically connected to said first power supply,
The other of the source and the drain of the first transistor is electrically connected to the output terminal of the circuit;
The other of the source and the drain of the second transistor is electrically connected to the input terminal of the circuit;
A gate of the second transistor is electrically connected to a second power source;
The channel length L1 and channel width W1 of the first transistor and the channel length L2 and channel width W2 of the second transistor satisfy L1 / W1: L2 / W2 = 1: 2 to 1:10. Display device.

In claim 1,
11. A display device, wherein a gate includes a gate line, one of a source and a drain includes a source line, and the other of the source and the drain includes a third transistor electrically connected to the gate of the first transistor.

In claim 1 or claim 2,
The gate has a fourth transistor electrically connected to the input terminal of the circuit, one of the source or the drain is electrically connected to the input terminal of the circuit, and the other of the source or the drain is electrically connected to a third power source ,
Wherein the fourth transistor is turned on, the display device according to claim Rukoto reverse bias voltage is applied to the second light-emitting element.

In any one of Claims 1 thru | or 3,
A capacitor element, a first switch element, a second switch element, a third switch element, a fourth switch element, a fifth switch element, and a control circuit;
The capacitive element is electrically connected to an input terminal of the circuit ;
The first switch element is provided between the other of the source and the drain of the first transistor and the output terminal of the circuit,
Said second switching element, or a source of the first transistor is provided between the other and the fourth power of the drain,
The third switch element, or the source of the second transistor is provided between the other and the fifth switch element of the drain,
The fourth switch element is provided between the other of the source and the drain of the second transistor and the fourth power source;
The fifth switching element, a display device, characterized by being et provided between the input terminal of said third switching element and the circuit.

In claim 4 , the first switch element, the third switch element and the fifth switch element are in a conductive state, the second switch element and the fourth switch element are in a non-conductive state, A display device comprising a control circuit for applying a forward bias voltage to the first light emitting element and the second light emitting element.

In claim 4 , the first switch element, the third switch element and the fifth switch element are made non-conductive, the second switch element and the fourth switch element are made conductive, A display device comprising a control circuit for applying a reverse bias voltage to the first light emitting element and the second light emitting element.

In any one of Claims 1 thru | or 3,
In the constant current source, a gate is electrically connected to a fifth power source, one of a source and a drain is electrically connected to a first electrode of the second light emitting element, and the other of the source and the drain is electrically connected to a sixth power source. display device characterized by having a fifth transistor.

In claim 7 ,
The display device, wherein the fifth transistor operates in a saturation region.

In any one of Claims 1 thru | or 8 ,
A display device comprising a resistance element provided between the other of the source and the drain of the second transistor and an input terminal of the circuit.

In any one of Claims 1 thru | or 9,
The gate includes a sixth transistor electrically connected to the gate line, one of the source and the drain is electrically connected to the first electrode of the second light emitting element, and the other of the source and the drain is connected to the seventh power source,
When the fifth transistor is turned on, a forward bias voltage is applied to the second light emitting element.

In any one of Claims 1 to 10 ,
The display device, wherein the circuit is a buffer amplifier.

In any one of Claims 1 thru | or 11,
The display device , wherein the first light-emitting element , the first transistor, the second light-emitting element, and the second transistor are provided over the same substrate.

An electronic apparatus using the display device according to any one of claims 1 to 12.