EL display device and manufacturing method thereof
First Claim
1. A display device comprising:
- a pixel portion comprising a pixel comprising;
a first transistor;
a second transistor electrically connected to the first transistor; and
a light emitting element electrically connected to the second transistor;
a first gate side driving circuit at a first side of the pixel portion;
a second gate side driving circuit at a second side of the pixel portion; and
wherein a gate electrode of the first transistor comprises a material which is different from a material of a gate wiring line,wherein an electrode of the light emitting element is electrically connected to one of a source wiring and a drain wiring of the second transistor through a first contact hole,wherein the one of the source wiring and the drain wiring of the second transistor is electrically connected to a semiconductor film of the second transistor through a second contact hole,wherein the first contact hole and the second contact hole do not overlap with each other,wherein a silicon nitride layer is positioned over the light emitting element,wherein a current flows through the first transistor in a first direction,wherein a current flows through the second transistor in a second direction,wherein the first direction intersects with the second direction, andwherein the display device does not comprise a circular polarizing film.
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Accused Products
Abstract
Reducing the manufacturing cost of an EL display device and an electronic device furnished with the EL display device is taken as an objective. A textured structure in which projecting portions are formed on the surface of a cathode is used. External stray light is diffusely (irregularly) reflected by the action of the projecting portions when reflected by the surface of the cathode, and therefore a defect in which the face of an observer or the surrounding scenery is reflected in the surface of the cathode can be prevented. This can be completed without using a conventionally necessary high price circular polarizing film, and therefore it is possible to reduce the cost of manufacturing the EL display device.
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Citations
28 Claims
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1. A display device comprising:
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a pixel portion comprising a pixel comprising; a first transistor; a second transistor electrically connected to the first transistor; and a light emitting element electrically connected to the second transistor; a first gate side driving circuit at a first side of the pixel portion; a second gate side driving circuit at a second side of the pixel portion; and wherein a gate electrode of the first transistor comprises a material which is different from a material of a gate wiring line, wherein an electrode of the light emitting element is electrically connected to one of a source wiring and a drain wiring of the second transistor through a first contact hole, wherein the one of the source wiring and the drain wiring of the second transistor is electrically connected to a semiconductor film of the second transistor through a second contact hole, wherein the first contact hole and the second contact hole do not overlap with each other, wherein a silicon nitride layer is positioned over the light emitting element, wherein a current flows through the first transistor in a first direction, wherein a current flows through the second transistor in a second direction, wherein the first direction intersects with the second direction, and wherein the display device does not comprise a circular polarizing film. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display device comprising:
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a pixel portion comprising a pixel comprising; a first transistor comprising a multi-gate structure; a second transistor electrically connected to the first transistor; and a light emitting element electrically connected to the second transistor; a first gate side driving circuit at a first side of the pixel portion; a second gate side driving circuit at a second side of the pixel portion; and wherein gate electrodes of the first transistor comprises a material which is different from a material of a gate wiring line, wherein an electrode of the light emitting element is electrically connected to one of a source wiring and a drain wiring of the second transistor through a first contact hole, wherein the one of the source wiring and the drain wiring of the second transistor is electrically connected to a semiconductor film of the second transistor through a second contact hole, wherein the first contact hole and the second contact hole do not overlap with each other, wherein a silicon nitride layer is positioned over the light emitting element, wherein a current flows through the first transistor in a first direction, wherein a current flows through the second transistor in a second direction, wherein the first direction intersects with the second direction, and wherein the display device does not comprise a circular polarizing film. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A display device comprising:
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a pixel portion comprising a pixel comprising; a first transistor; a second transistor electrically connected to the first transistor; and a light emitting element electrically connected to the second transistor; a first gate side driving circuit at a first side of the pixel portion; a second gate side driving circuit at a second side of the pixel portion; and wherein a gate electrode of the first transistor comprises a material which is different from a material of a gate wiring line, wherein an electrode of the light emitting element is electrically connected to one of a source wiring and a drain wiring of the second transistor through a first contact hole, wherein the one of the source wiring and the drain wiring of the second transistor is electrically connected to a semiconductor film of the second transistor through a second contact hole, wherein the first contact hole and the second contact hole do not overlap with each other, wherein a silicon nitride layer is positioned over the light emitting element, wherein a current flows through the first transistor in a first direction, wherein a current flows through the second transistor in a second direction, wherein the first direction intersects with the second direction, and wherein the display device does not comprise an optical film. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A display device comprising:
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a pixel portion comprising a pixel comprising; a first transistor comprising a multi-gate structure; a second transistor electrically connected to the first transistor; and a light emitting element electrically connected to the second transistor; a first gate side driving circuit at a first side of the pixel portion; a second gate side driving circuit at a second side of the pixel portion; and wherein gate electrodes of the first transistor comprises a material which is different from a material of a gate wiring line, wherein an electrode of the light emitting element is electrically connected to one of a source wiring and a drain wiring of the second transistor through a first contact hole, wherein the one of the source wiring and the drain wiring of the second transistor is electrically connected to a semiconductor film of the second transistor through a second contact hole, wherein the first contact hole and the second contact hole do not overlap with each other, wherein a silicon nitride layer is positioned over the light emitting element, wherein a current flows through the first transistor in a first direction, wherein a current flows through the second transistor in a second direction, wherein the first direction intersects with the second direction, and wherein the display device does not comprise an optical film. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification