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Organic el display panel and manufacturing method thereof

A luminescence and display technology, applied in the manufacture/processing of organic semiconductor devices, semiconductor/solid-state device manufacturing, circuits, etc., can solve problems such as fluctuations become more obvious, achieve uniform film thickness, high wettability, The effect of flattening the coated area

Active Publication Date: 2010-03-31
JAPAN DISPLAY DESIGN & DEV CONTRACT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the second bank 3 for defining the pixel region 30 is omitted, the surface of the pixel electrode or the hole transport layer and the surface of the substrate will have steps due to the difference in height, and the undulations in the linear region 40 may instead be changed. more obvious

Method used

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  • Organic el display panel and manufacturing method thereof
  • Organic el display panel and manufacturing method thereof
  • Organic el display panel and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0153] When the lower layer of the organic layer is a hole transport layer made of an oxide of a transition metal, the height of the second bank from the surface of the hole transport layer made of an oxide of a transition metal is preferably -0.1 to +0.4 μm, more preferably about 0 μm. In this way, when the lower layer of the organic layer is a hole transport layer made of transition metal oxide, the second bank does not need to define a layer formed by coating, so the second bank can be formed from the transition metal. The surface height of the hole transport layer made of oxide is low. Thereby, the inside of the application area can be made flat, and the film thickness of the organic layer can be made more uniform.

[0154] iii) When the lower layer of the organic layer is a hole transport layer containing PEDOT-PSS (see Embodiment 2)

[0155] When the lower layer of the organic layer is a hole transport layer made of a transition metal oxide, the height of the second ba...

Embodiment approach 2

[0213] In Embodiment 1, an example in which the hole transport layer is made of a transition metal oxide has been described. In Embodiment 2, an example in which the hole transport layer contains PEDOT-PSS will be described.

[0214] The organic EL display panel of Embodiment 2 is the same as the organic EL display panel of Embodiment 1 except that 1) the material of the hole transport layer is PEDOT-PSS and 2) the positional relationship between the second bank and the hole transport layer is different. Therefore, the same reference numerals are assigned to the same components as those in Embodiment 1, and description thereof will be omitted.

[0215] Figure 6A It is a plan view of an active matrix organic EL display panel according to Embodiment 2 omitting a counter electrode and an organic light-emitting layer. Figure 6B yes Figure 6A A perspective view of the organic EL display shown.

[0216] Figure 8A It is an A-A sectional view of the organic EL element include...

Embodiment approach 3

[0250] In Embodiments 1 and 2, an example in which the end portion in the longitudinal direction of the application region is not defined was described. In this embodiment, an example will be described in which the ends in the longitudinal direction of the application region are also defined by the first banks. In addition, in Embodiments 1 and 2, the method of disposing the second bank between the pixel region and the first bank was described (see FIG. 6 ), but in Embodiment 3, the description is made of A mode in which no second dike is arranged between one dike.

[0251] The organic EL display panel of the present embodiment is the same as the embodiment except that it has the first bank 105 ′ defining the end of the coating region and does not have the second bank 107 between the pixel region 120 and the first bank 105 . 1's organic EL display is the same. Therefore, the same reference numerals are assigned to the same components as those of the organic EL display panel ...

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Abstract

Disclosed is an organic EL display panel comprising a substrate, a rectilinear first bank arranged on said substrate and defining a rectilinear area, a second bank defining two or more pixel areas arranged in said rectilinear area, pixel electrodes provided in said pixel areas, a rectilinear organic layer that is arranged in said rectilinear area and that is formed by coating of said pixel areas and said second bank, and a counter electrode arranged on said organic layer. The first bank is higher than the second bank, and the material of the first and second banks is a resin. The anisole contact angle at the apex of said first bank is in the range of 30-60 DEG , and the anisole contact angle at the apex of said second bank is in the range of 5-30 DEG .

Description

technical field [0001] The present invention relates to an organic EL (Electroluminescent: electroluminescence) display screen and a manufacturing method thereof. Background technique [0002] The so-called organic EL display screen refers to a display screen having light-emitting elements that utilize electroluminescence of organic compounds. That is to say, the organic EL display screen has an EL element, and the EL element includes: a pixel electrode, an organic light-emitting layer disposed on the pixel electrode, and a counter electrode disposed on the organic light-emitting layer. The organic EL materials included in the organic light-emitting layer can be roughly classified into combinations of low-molecular organic compounds (host material and dopant material) and high-molecular organic compounds. Examples of high-molecular organic compounds include polyphenylenevinylene called PPV, derivatives thereof, and the like. Organic EL displays using high-molecular organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32H01L51/52H01L21/82H01L51/56
CPCH01L27/3283H01L27/3246H01L51/0005H10K59/122H10K59/173H10K71/135H10K71/00
Inventor 中谷修平吉田英博高木清彦
Owner JAPAN DISPLAY DESIGN & DEV CONTRACT CO LTD
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