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US 2012/0056204 A1Published application
Light emitting device and manufacturing method thereof
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsShunpei YAMAZAKI, Satoshi SEO
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Abstract
A light emitting device which includes a first TFT, a second TFT, a first pixel electrode, a second pixel electrode, an organic compound layer, a first opposing electrode and a second opposing electrode. The organic compound layer is formed on the first pixel electrode and the second pixel electrode. The first opposing electrode and a second opposing electrode are formed on the organic compound layer. When the first pixel electrode and the second opposing electrode are anodes, the second pixel electrode and the first opposing electrode are cathodes. When the first pixel electrode and the second opposing electrode are cathodes, the second pixel electrode and the first opposing electrode are anodes.
Claims19
A light emitting device comprising:
- a first TFT formed on an insulating surface;
- a second TFT formed on the insulating surface;
- a first insulating film formed over the first TFT and the second TFT;
- a first pixel electrode formed on the first insulating film;
- a second pixel electrode formed on the first insulating film;
- a second insulating film formed covering a connection portion between the first pixel electrode and the first TFT, and a connection portion between the second pixel electrode and the second TFT;
- an organic compound layer formed on the first pixel electrode and the second pixel electrode;
- a first opposing electrode formed on the organic compound layer;
- and
- a second opposing electrode formed on the organic compound layer,
- wherein electrodes comprising the first pixel electrode and the second opposing electrode are anodes or cathodes,
- wherein electrodes comprising the second pixel electrode and the first opposing electrode are anodes or cathodes,
- wherein when electrodes comprising the first pixel electrode and the second opposing electrode are anodes, the electrodes comprising the second pixel electrode and the first opposing electrode are cathodes, and
- wherein when electrodes comprising the first pixel electrode and the second opposing electrode are cathodes, the electrodes comprising the second pixel electrode and the first opposing electrode are anodes.
11 more elements
A light emitting device comprising:
- a first TFT formed on an insulating surface;
- a second TFT formed on the insulating surface;
- a first insulating film formed over the first TFT and the second TFT;
- a first pixel electrode and a second pixel electrode formed on the first insulating film;
- a second insulating film formed covering a connection portion between the first pixel electrode and the first TFT, and a connection portion between the second pixel electrode and the second TFT;
- an organic compound layer formed on the first pixel electrode and the second pixel electrode;
- a first opposing electrode formed on the organic compound layer;
- and
- a second opposing electrode formed on the organic compound layer,
- wherein the first TFT and the second TFT each have a source region and a drain region,
- wherein the first pixel electrode comprises a first electrode,
- wherein the second pixel electrode comprises a second electrode and an auxiliary electrode,
- wherein the first electrode is electrically connected to one of the source region and the drain region of the first TFT, in a first opening portion formed in the first insulating film,
- wherein the second electrode is electrically connected to one of the source region and the drain region of the second TFT, in a second opening portion formed in the first insulating film,
- wherein electrodes comprising the first pixel electrode and the second opposing electrode are anodes or cathodes,
- wherein electrodes comprising the second pixel electrode and the first opposing electrode are anodes or cathodes,
- wherein when electrodes comprising the first pixel electrode and the second opposing electrode are anodes, the electrodes comprising the second pixel electrode and the first opposing electrode are cathodes, and
- wherein when electrodes comprising the first pixel electrode and the second opposing electrode are cathodes, the electrodes comprising the second pixel electrode and the first opposing electrode are anodes.
15 more elements
A light emitting device comprising:
- a first TFT formed on an insulating surface;
- a second TFT formed on the insulating surface;
- a first insulating film formed over the first TFT and the second TFT;
- a first pixel electrode formed on the first insulating film;
- a second pixel electrode formed on the first insulating film;
- a second insulating film formed covering a connection portion between the first pixel electrode and the first TFT, and a connection portion between the second pixel electrode and the second TFT;
- an organic compound layer formed on the first pixel electrode and the second pixel electrode;
- a first opposing electrode formed on the organic compound layer;
- and
- a second opposing electrode formed on the organic compound layer,
- wherein the first opposing electrode comprises an auxiliary electrode and a first electrode,
- wherein the second opposing electrode comprises a second electrode,
- wherein electrodes comprising the first pixel electrode and the second opposing electrode are anodes or cathodes,
- wherein electrodes comprising the second pixel electrode and the first opposing electrode are anodes or cathodes,
- wherein when electrodes comprising the first pixel electrode and the second opposing electrode are anodes, the electrodes comprising the second pixel electrode and the first opposing electrode are cathodes, and
- wherein when electrodes comprising the first pixel electrode and the second opposing electrode are cathodes, the electrodes comprising the second pixel electrode and the first opposing electrode are anodes.
13 more elements
A method of manufacturing a light emitting device having a first light emitting element and a second light emitting element, the method comprising:
- forming a first electrode and a second electrode on an insulating surface;
- forming a first auxiliary electrode on the second electrode;
- forming an organic compound layer over the first electrode, the second electrode, and the first auxiliary electrode;
- forming a second auxiliary electrode over the organic compound layer and in a position overlapping with the first electrode;
- and
- forming a third electrode over the organic compound layer and the second auxiliary electrode,
- wherein the first light emitting element comprises:
- a first pixel electrode comprising the first electrode;
- the organic compound layer;
- and
- a first opposing electrode comprising the second auxiliary electrode and the third electrode, and
- wherein the second light emitting element comprises:
- a second pixel electrode comprising the second electrode and the first auxiliary electrode;
- the organic compound layer;
- and
- a second opposing electrode comprising the third electrode.
13 more elements
A method of manufacturing a light emitting device having a first light emitting element and a second light emitting element, the method comprising:
- forming a first TFT and a second TFT on an insulating surface;
- forming a first insulating layer over the first TFT and the second TFT;
- forming a first electrode and a second electrode on the first insulating layer;
- forming a first auxiliary electrode on the second electrode;
- forming a second insulating layer covering a connection portion between the first electrode and the first TFT and a connection portion between the second electrode and the second TFT;
- forming an organic compound layer over the first electrode, the second electrode, and the first auxiliary electrode;
- forming a second auxiliary electrode over the organic compound layer and in a position overlapping with the first electrode;
- and
- forming a third electrode on the organic compound layer and the second auxiliary electrode,
- wherein the first light emitting element comprises:
- a first pixel electrode comprising the first electrode;
- the organic compound layer;
- and
- a first opposing electrode comprising the second auxiliary electrode and the third electrode, and
- wherein the second light emitting element comprises:
- a second pixel electrode comprising the second electrode and the first auxiliary electrode;
- the organic compound layer;
- and
- a second opposing electrode comprising the third electrode.
16 more elements
Dependencies are inferred from the claim text.