Display device and method of manufacturing the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorRumo Satake
Life of this patent
Estimating the term…
Abstract
A display device using an organic light emitting element is provided which is structured so as to ensure excellent display performance by avoiding dot defect and improve long-term reliability. The distance between an organic light emitting element and a sealing substrate is controlled using the top of a bank that is placed in a pixel portion and the top of an insulating film that is placed in a driving circuit portion. As a result, a gap is provided between the organic light emitting element and the sealing substrate and a damage to the organic light emitting element can be avoided. Furthermore, the sealing substrate can be as close to an element substrate as possible, thereby keeping the amount of moisture that enters the display device from its sides small.
Claims31
A display device comprising:
- an element substrate including at least an organic light emitting element;
- a sealing substrate opposing the element substrate;
- a seal member for bonding the element substrate and the sealing substrate;
- a pixel electrode over the element substrate;
- at least a bank over the element substrate, wherein the bank is covering edges of the pixel electrode;
- an organic compound layer on the pixel electrode in contact with side faces of the bank;
- and
- an opposite electrode formed on the organic compound layer in contact with side faces of the bank,
- wherein a top of the bank and a top of the seal member are in contact with the sealing substrate.
A display device comprising:
- an element substrate including at least an organic light emitting element;
- a sealing substrate opposing the element substrate;
- a seal member for bonding the element substrate and the sealing substrate;
- a pixel electrode over the element substrate;
- at least a bank over the element substrate, wherein the bank is covering edges of the pixel electrode;
- an insulating film over the element substrate formed in a same step as the bank,
- an organic compound layer on the pixel electrode in contact with side faces of the bank;
- and
- an opposite electrode formed on the organic compound layer in contact with side faces of the bank,
- wherein a top of the bank, a top of the insulating film and a top of the seal member are in contact with the sealing substrate.
A display device comprising:
- an element substrate including at least an organic light emitting element;
- a sealing substrate opposing the element substrate;
- a seal member for bonding the element substrate and the sealing substrate,
- a pixel electrode over the element substrate;
- at least a bank over the element substrate, wherein the bank is covering edges of the pixel electrode;
- an insulating film over the element substrate formed in a same step as the bank;
- an organic compound layer on the pixel electrode in contact with side faces of the bank;
- and
- an opposite electrode formed on the organic compound layer in contact with side faces of the bank,
- a protective film for covering at least a top of the bank,
- wherein the protective film on the top of the bank and the top of the seal member are in contact with the sealing substrate.
A display device comprising:
- an element substrate including at least an organic light emitting element;
- a sealing substrate opposing the element substrate;
- a seal member for bonding the element substrate and the sealing substrate;
- a pixel electrode over the element substrate;
- at least a bank over the element substrate, wherein the bank is covering edges of the pixel electrode;
- an insulating film over the element substrate formed in a same step as the bank;
- an organic compound layer on the pixel electrode in contact with side faces of the bank;
- and
- an opposite electrode formed on the organic compound layer in contact with side faces of the bank,
- a protective film for covering at least a top of the bank and a top of the insulating film,
- wherein the protective film on the top of the bank and on the top of the insulating film and a top of the seal member are in contact with the sealing substrate.
Dependencies are inferred from the claim text.