Display device and method for manufacturing thereof
First Claim
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1. A display device including a plurality of pixels arranged in a matrix form, comprising:
- a substrate;
at least a first insulating bank and a second insulating bank formed over the substrate;
a first electrode formed over the substrate and between the first insulating bank and the second insulating bank;
an organic conductive film comprising a low-molecular organic semiconductor and an accepter, wherein the organic conductive film is formed over the first electrode and on at least top surfaces of the first insulating bank and the second insulating bank;
an organic thin film containing an organic compound capable of causing electroluminescence formed over the organic conductive film and between the first insulating bank and the second insulating bank; and
a second electrode formed over the organic thin film,wherein the top surfaces of the first insulating bank and the second insulating bank are not covered with the organic thin film containing the organic compound capable of causing electroluminescence,wherein the organic conductive film formed in a vicinity of a top edge of the first insulating bank has a first thickness, and the organic conductive film formed in a vicinity of a center of the first electrode between the first insulating bank and the second insulating bank has a second thickness, andwherein the second thickness is thicker than the first thickness.
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Abstract
It is a problem to provide an electric apparatus less in consumption power and long in life by the manufacture using the display device. An insulating bank is provided in a form surrounding the pixel portions on first electrodes over a substrate. The entire surface is applied, by a wet scheme (method), with an organic conductive film which has a thickness form of T2>T1>T3> under the influence of the insulating bank. Accordingly, the portion T3 has an increased resistance in a lateral direction, making possible to prevent against crosstalk. Due to a conductive polymer as a buffer layer, a display device can be provided which is low in drive voltage. Furthermore, because the portion T2 is increased in thickness, the electric-field concentration is relaxed at and around the pixel portion. This makes it possible to prevent the organic light-emitting element from deteriorating at around the pixel.
47 Citations
27 Claims
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1. A display device including a plurality of pixels arranged in a matrix form, comprising:
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a substrate; at least a first insulating bank and a second insulating bank formed over the substrate; a first electrode formed over the substrate and between the first insulating bank and the second insulating bank; an organic conductive film comprising a low-molecular organic semiconductor and an accepter, wherein the organic conductive film is formed over the first electrode and on at least top surfaces of the first insulating bank and the second insulating bank; an organic thin film containing an organic compound capable of causing electroluminescence formed over the organic conductive film and between the first insulating bank and the second insulating bank; and a second electrode formed over the organic thin film, wherein the top surfaces of the first insulating bank and the second insulating bank are not covered with the organic thin film containing the organic compound capable of causing electroluminescence, wherein the organic conductive film formed in a vicinity of a top edge of the first insulating bank has a first thickness, and the organic conductive film formed in a vicinity of a center of the first electrode between the first insulating bank and the second insulating bank has a second thickness, and wherein the second thickness is thicker than the first thickness. - View Dependent Claims (2, 3)
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4. A display device including a plurality of pixels arranged in a matrix form, comprising:
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a substrate; at least a first insulating bank and a second insulating bank formed over the substrate; a first electrode formed over the substrate and between the first insulating bank and the second insulating bank; an organic conductive film comprising a low-molecular organic semiconductor and a donor, wherein the organic conductive film is formed over the first electrode and on at least top surfaces of the first insulating bank and the second insulating bank; an organic thin film containing an organic compound capable of causing electroluminescence formed over the organic conductive film and between the first insulating bank and the second insulating bank; and a second electrode formed over the organic thin film, wherein the top surfaces of the first insulating bank and the second insulating bank are not covered with the organic thin film containing the organic compound capable of causing electroluminescence, wherein the organic conductive film formed in a vicinity of a top edge of the first insulating bank has a first thickness, and the organic conductive film formed in a vicinity of a center of the first electrode between the first insulating bank and the second insulating bank has a second thickness, and wherein the second thickness is thicker than the first thickness. - View Dependent Claims (5, 6)
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7. A display device including a plurality of pixels arranged in a matrix form, comprising:
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a substrate; at least a first insulating bank and a second insulating bank formed over the substrate; a first electrodes formed over the substrate and between the first insulating bank and the second insulating bank; an organic conductive film covering surfaces of the first insulating bank and the second insulating bank and formed over the first electrode; an organic thin film containing an organic compound capable of causing electroluminescence formed over the organic conductive film and between the first insulating bank and the second insulating banks; and a second electrode formed over the organic thin film, wherein the organic conductive film formed in a vicinity of a top edge of the first insulating bank has a first thickness, and the organic conductive film formed in a vicinity of a center of the first electrode between the first insulating bank and the second insulating bank has a second thickness, and wherein the second thickness is thicker than the first thickness. - View Dependent Claims (8, 9, 10, 11)
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12. A display device including a plurality of pixels, each pixel comprising:
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at least a first insulating bank and a second insulating bank formed over a substrate; an electrode formed over a substrate and between the first insulating bank and a second insulating bank; an organic conductive film formed over the electrode and on at least top surfaces of the first insulating bank and the second insulating bank; an organic thin film containing an organic compound capable of causing electroluminescence formed over the organic conductive film and between the first insulating bank and the second insulating bank; and a conductive layer formed over the organic thin film, wherein the top surfaces of the first insulating bank and the second insulating bank are not covered with the organic thin film containing the organic compound capable of causing electroluminescence, wherein the conductive layer extends over at least two pixels, wherein the organic conductive film formed in a vicinity of a top edge of the first insulating bank has a first thickness, and the organic conductive film formed in a vicinity of a center of the first electrode between the first insulating bank and the second insulating bank has a second thickness, and wherein the second thickness is thicker than the first thickness. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A display device including a plurality of pixels arranged in a matrix form, comprising:
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a substrate; a first electrode formed over the substrate; a second electrode formed over the substrate; a first insulating bank formed over the substrate and a first edge portion of the first electrode; a second insulating bank formed over the substrate, a second edge portion of the first electrode and a first edge portion of the second electrode; a third insulating bank formed over the substrate and a second edge portion of the second electrode; an organic conductive film formed over the first insulating bank, the second insulating bank, the third insulating bank, the first electrode and the second electrode; a first organic thin film containing an organic compound capable of causing electroluminescence formed over the first electrode; a second organic thin film containing an organic compound capable of causing electroluminescence formed over the second electrode, wherein the second organic thin film is separated from the first organic thin film, wherein the organic conductive film formed in a vicinity of a top edge of the first insulating bank has a first thickness, and the organic conductive film formed in a vicinity of a center of the first electrode between the first insulating bank and the second insulating bank has a second thickness, and wherein the second thickness is thicker than the first thickness. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification
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Current AssigneeSemiconductor Energy Laboratory Co., Ltd.
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Original AssigneeSemiconductor Energy Laboratory Co., Ltd.
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InventorsSeo, Satoshi, Yamazaki, Shunpei
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Primary Examiner(s)Guharay; Karabi
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Application NumberUS11/713,910Publication NumberTime in Patent Office1,184 DaysField of Search313/504, 313/506US Class Current313/504CPC Class CodesH05B 33/10 Apparatus or processes spec...H10K 50/155 comprising dopantsH10K 50/165 comprising dopantsH10K 50/17 Carrier injection layersH10K 50/805 ElectrodesH10K 59/00 Integrated devices, or asse...H10K 59/122 Pixel-defining structures o...H10K 59/173 comprising banks or shadow ...
