Organic EL device and organic EL display apparatus

1. An organic electro luminescence device comprising:

an organic electro luminescence light emitting element; and

a driving circuit for driving said organic electro luminescence light emitting element, wherein

said driving circuit includes

(A) an element driving transistor,

(B) a video-signal write transistor, and

(C) a capacitor having a pair of particular and other electrodes,

with regard to said element driving transistor,

(A-1) a source/drain area provided on a particular side of said element driving transistor to serve as a particular source/drain area of said element driving transistor is connected to a current supply section, and

(A-2) a source/drain area provided on the other side of said element driving transistor to serve as another source/drain area of said element driving transistor is connected to the anode electrode of said organic electro luminescence light emitting element and said particular electrode of said capacitor, forming a second node,

said video-signal write transistor is a transistor with a dual-gate structure including a first sub-transistor having a first channel creation area as well as a first gate electrode and including a second sub-transistor having a second channel creation area as well as a second gate electrode,

a source/drain area provided on a particular side of said first sub-transistor to serve as a particular source/drain area of said first sub-transistor is connected to a data line,

a source/drain area provided on the other side of said second sub-transistor to serve as another source/drain area of said second sub-transistor is connected to the gate electrode of said element driving transistor and said other electrode of said capacitor, forming a first node,

said first gate electrode of said first sub-transistor and said second gate electrode of said second sub-transistor are connected to a scan line,

said first gate electrode of said first sub-transistor faces a particular face of said first channel creation area of said first sub-transistor through a gate insulation layer sandwiched by said first gate electrode and said particular face of said first channel creation area,

said second gate electrode of said second sub-transistor faces a particular face of said second channel creation area of said second sub-transistor through said gate insulation layer sandwiched by said second gate electrode and said particular face of said second channel creation area,

said second sub-transistor has a shield electrode facing the other face of said second channel creation area through a shield insulation layer sandwiched by said shield electrode and said other face of said second channel creation area, and

said shield electrode is connected to said other source/drain area of said second sub-transistor.

2. The organic electro luminescence device according to claim 1 wherein:

said second sub-transistor further has a second shield electrode facing said other face of said second channel creation area through a shield insulation layer sandwiched by said second shield electrode and said other face of said second channel creation area; and

said second shield electrode is connected to a common area in which a source/drain area provided on the other side of said first sub-transistor to serve as another source/drain area of said first sub-transistor overlaps a source/drain area provided on a particular side of said second sub-transistor to serve as a particular source/drain area of said second sub-transistor.

3. The organic electro luminescence device according to claim 1 wherein:

said first sub-transistor has a third shield electrode facing the other face of said first channel creation area through a shield insulation layer sandwiched by said third shield electrode and said other face of said first channel creation area; and

said third shield electrode is connected to said particular source/drain area of said first sub-transistor.

4. The organic electro luminescence device according to claim 1 wherein:

said second sub-transistor further has a second shield electrode facing said other face of said second channel creation area through a shield insulation layer sandwiched by said second shield electrode and said other face of said second channel creation area;

said first sub-transistor has third and fourth shield electrodes facing the other face of said first channel creation area through a shield insulation layer sandwiched by said third and fourth shield electrodes and said other face of said first channel creation area;

said second and fourth shield electrodes are connected to a common area in which a source/drain area provided on the other side of said first sub-transistor to serve as another source/drain area of said first sub-transistor overlaps a source/drain area provided on a particular side of said second sub-transistor to serve as a particular source/drain area of said second sub-transistor; and

said third shield electrode is connected to said particular source/drain area of said first sub-transistor.

5. An organic electro luminescence device comprising:

an organic electro luminescence light emitting element; and

a driving circuit for driving said organic electro luminescence light emitting element, wherein

said driving circuit includes

(A) an element driving transistor,

(B) a video-signal write transistor,

(C) a capacitor having a pair of particular and other electrodes, and

(D) a first-node initialization transistor,

with regard to said element driving transistor,

(A-1) a source/drain area provided on a particular side of said element driving transistor to serve as a particular source/drain area of said element driving transistor is connected to a current supply section, and

(A-2) a source/drain area provided on the other side of said element driving transistor to serve as another source/drain area of said element driving transistor is connected to the anode electrode of said organic electro luminescence light emitting element and said particular electrode of said capacitor, forming a second node,

with regard to said video-signal write transistor,

(B-1) a source/drain area provided on a particular side of said video-signal write transistor to serve as a particular source/drain area of said video-signal write transistor is connected to a data line,

(B-2) a source/drain area provided on the other side of said video-signal write transistor to serve as another source/drain area of said video-signal write transistor is connected to the gate electrode of said element driving transistor and said other electrode of said capacitor, forming a first node, and

(B-3) the gate electrode of said video-signal write transistor is connected to a scan line,

said first-node initialization transistor is a transistor with a dual-gate structure including a first sub-transistor having a first channel creation area as well as a first gate electrode and including a second sub-transistor having a second channel creation area as well as a second gate electrode,

a source/drain area provided on a particular side of said first sub-transistor to serve as a particular source/drain area of said first sub-transistor is connected to a first-node initialization voltage supply line,

a source/drain area provided on the other side of said second sub-transistor to serve as another source/drain area of said second sub-transistor is connected to said first node,

said first gate electrode of said first sub-transistor and said second gate electrode of said second sub-transistor are connected to a first-node initialization transistor control line,

said first gate electrode of said first sub-transistor faces a particular face of said first channel creation area of said first sub-transistor through a gate insulation layer sandwiched by said first gate electrode and said particular face of said first channel creation area,

said second gate electrode of said second sub-transistor faces a particular face of said second channel creation area of said second sub-transistor through said gate insulation layer sandwiched by said second gate electrode and said particular face of said second channel creation area,

said second sub-transistor has a shield electrode facing the other face of said second channel creation area through a shield insulation layer sandwiched by said shield electrode and said other face of said second channel creation area, and

said shield electrode is connected to said other source/drain area of said second sub-transistor.

6. The organic electro luminescence device according to claim 5 wherein:

said second sub-transistor further has a second shield electrode facing said other face of said second channel creation area through a shield insulation layer sandwiched by said second shield electrode and said other face of said second channel creation area; and

said second shield electrode is connected to a common area in which a source/drain area provided on the other side of said first sub-transistor to serve as another source/drain area of said first sub-transistor overlaps a source/drain area provided on a particular side of said second sub-transistor to serve as a particular source/drain area of said second sub-transistor.

7. The organic electro luminescence device according to claim 5 wherein:

said first sub-transistor has a third shield electrode facing the other face of said first channel creation area through a shield insulation layer sandwiched by said third shield electrode and said other face of said first channel creation area; and

said third shield electrode is connected to said particular source/drain area of said first sub-transistor.

8. The organic electro luminescence device according to claim 5 wherein:

said second sub-transistor further has a second shield electrode facing said other face of said second channel creation area through a shield insulation layer sandwiched by said second shield electrode and said other face of said second channel creation area;

said first sub-transistor has third and fourth shield electrodes facing the other face of said first channel creation area through a shield insulation layer sandwiched by said third and fourth shield electrodes and said other face of said first channel creation area;

said second and fourth shield electrodes are connected to a common area in which a source/drain area provided on the other side of said first sub-transistor to serve as another source/drain area of said first sub-transistor overlaps a source/drain area provided on a particular side of said second sub-transistor to serve as a particular source/drain area of said second sub-transistor; and

said third shield electrode is connected to said particular source/drain area of said first sub-transistor.

9. An organic electro luminescence display apparatus comprising:

(1) a scan circuit;

(2) a video-signal outputting circuit;

(3) a total of M×N organic electro luminescence devices laid out to form a two-dimensional matrix of N said organic electro luminescence devices arranged in a first direction and M said organic electro luminescence devices arranged in a second direction different from said first direction;

(4) M scan lines each connected to said scan circuit and each stretched in said first direction;

(5) N data lines each connected to said video-signal outputting circuit and each stretched in said second direction; and

(6) a current supply section, wherein

each of said organic electro luminescence devices includes an organic electro luminescence light emitting element and a driving circuit for driving said organic electro luminescence light emitting element,

said driving circuit includes

(A) an element driving transistor,

(B) a video-signal write transistor, and

(C) a capacitor having a pair of particular and other electrodes,

with regard to said element driving transistor,

(A-1) a source/drain area provided on a particular side of said element driving transistor to serve as a particular source/drain area of said element driving transistor is connected to said current supply section, and

(A-2) a source/drain area provided on the other side of said element driving transistor to serve as another source/drain area of said element driving transistor is connected to the anode electrode of said organic electro luminescence light emitting element and said particular electrode of said capacitor, forming a second node,

said video-signal write transistor is a transistor with a dual-gate structure including a first sub-transistor having a first channel creation area as well as a first gate electrode and including a second sub-transistor having a second channel creation area as well as a second gate electrode,

a source/drain area provided on a particular side of said first sub-transistor to serve as a particular source/drain area of said first sub-transistor is connected to one of said data lines,

a source/drain area provided on the other side of said second sub-transistor to serve as another source/drain area of said second sub-transistor is connected to the gate electrode of said element driving transistor and said other electrode of said capacitor, forming a first node,

said first gate electrode of said first sub-transistor and said second gate electrode of said second sub-transistor are connected to one of said scan lines,

said first gate electrode of said first sub-transistor faces a particular face of said first channel creation area of said first sub-transistor through a gate insulation layer sandwiched by said first gate electrode and said particular face of said first channel creation area,

said second gate electrode of said second sub-transistor faces a particular face of said second channel creation area of said second sub-transistor through said gate insulation layer sandwiched by said second gate electrode and said particular face of said second channel creation area,

said second sub-transistor has a shield electrode facing the other face of said second channel creation area through a shield insulation layer sandwiched by said shield electrode and said other face of said second channel creation area, and

said shield electrode is connected to said other source/drain area of said second sub-transistor.

10. An organic electro luminescence display apparatus comprising:

(1) a scan circuit;

(2) a video-signal outputting circuit;

(3) a total of M×N organic electro luminescence devices laid out to form a two-dimensional matrix of N said organic electro luminescence devices arranged in a first direction and M said organic electro luminescence devices arranged in a second direction different from said first direction;

(4) M scan lines each connected to said scan circuit and each stretched in said first direction;

(5) N data lines each connected to said video-signal outputting circuit and each stretched in said second direction; and

(6) a current supply section, wherein

each of said organic electro luminescence devices includes an organic electro luminescence light emitting element and a driving circuit for driving said organic electro luminescence light emitting element,

said driving circuit includes

(A) an element driving transistor,

(B) a video-signal write transistor,

(C) a capacitor having a pair of particular and other electrodes, and

(D) a first-node initialization transistor,

with regard to said element driving transistor,

(A-1) a source/drain area provided on a particular side of said element driving transistor to serve as a particular source/drain area of said element driving transistor is connected to said current supply section, and

(A-2) a source/drain area provided on the other side of said element driving transistor to serve as another source/drain area of said element driving transistor is connected to the anode electrode of said organic electro luminescence light emitting element and said particular electrode of said capacitor, forming a second node,

with regard to said video-signal write transistor,

(B-1) a source/drain area provided on a particular side of said video-signal write transistor to serve as a particular source/drain area of said video-signal write transistor is connected to one of said data lines,

(B-2) a source/drain area provided on the other side of said video-signal write transistor to serve as another source/drain area of said video-signal write transistor is connected to the gate electrode of said element driving transistor and said other electrode of said capacitor, forming a first node, and

(B-3) the gate electrode of said video-signal write transistor is connected to one of said scan lines,

said first-node initialization transistor is a transistor with a dual-gate structure including a first sub-transistor having a first channel creation area as well as a first gate electrode and including a second sub-transistor having a second channel creation area as well as a second gate electrode,

a source/drain area provided on a particular side of said first sub-transistor to serve as a particular source/drain area of said first sub-transistor is connected to a first-node initialization voltage supply line,

a source/drain area provided on the other side of said second sub-transistor to serve as another source/drain area of said second sub-transistor is connected to said first node,

said first gate electrode of said first sub-transistor and said second gate electrode of said second sub-transistor are connected to a first-node initialization transistor control line,

said first gate electrode of said first sub-transistor faces a particular face of said first channel creation area of said first sub-transistor through a gate insulation layer sandwiched by said first gate electrode and said particular face of said first channel creation area,

said second gate electrode of said second sub-transistor faces a particular face of said second channel creation area of said second sub-transistor through said gate insulation layer sandwiched by said second gate electrode and said particular face of said second channel creation area,

said second sub-transistor has a shield electrode facing the other face of said second channel creation area through a shield insulation layer sandwiched by said shield electrode and said other face of said second channel creation area, and

said shield electrode is connected to said other source/drain area of said second sub-transistor.