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Organic EL device and display apparatus

An electroluminescent device and electroluminescent technology, which are applied in the fields of organic EL devices and display devices, can solve problems such as unfavorable luminous efficiency, loss of luminous area, influence, etc., and achieve the effect of improving luminous efficiency

Active Publication Date: 2009-09-23
JOLED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, it is difficult to flatten the light-emitting layer near the banks, which cause unevenness in the thickness of the light-emitting layer.
The non-uniformity of the thickness of the light-emitting layer has an adverse effect on the luminous efficiency
In order to solve this problem, if the distance between the pixel regions is enlarged, the loss of the light emitting area will occur as described above.

Method used

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  • Organic EL device and display apparatus
  • Organic EL device and display apparatus
  • Organic EL device and display apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0042] [1. Basic structure of organic EL device]

[0043] Figure 4 It is a sectional view showing the basic structure of the organic EL device according to Embodiment 1 of the present invention. also, Figure 5 It is a perspective view showing the basic structure of an organic EL device. in addition, Figure 4 so Figure 5 The cross-sectional view of the organic EL device after cutting the A-A plane of . In addition, in Figure 4 and Figure 5In the drawing, the hole transport layer, the intermediate layer (IL), the organic light-emitting layer (polymer organic EL material layer), and the cathode (cathode electrode) are not shown.

[0044] exist Figure 4 Among them, the organic EL device 10 includes: a substrate 100, an anode (anode electrode) 210, an insulating inorganic film 220, a first bank 230, and a second bank 240 (refer to Figure 5 ). The organic EL device 10 is an organic EL device whose driving method is an active method.

[0045] The substrate 100 incl...

Embodiment approach 2

[0106] In Embodiment 2, the material for the hole transport layer is tungsten oxide (WO x ), molybdenum oxide (MoO x ), vanadium oxide (VO x ) and other oxides, or the case of a combination of these oxides has been described.

[0107] [1. Basic structure of organic EL device]

[0108] The basic structure of the organic EL device of Embodiment 2 and Figure 4 and Figure 5 The basic structure of Embodiment 1 shown is the same. That is, the insulating inorganic film is disposed around the first banks, specifically, along the respective side faces of the two first banks that separate the pixel region, at the edge of the pixel region. In addition, the insulating inorganic film is disposed around the second banks, specifically, disposed on the edge of the pixel region along the opposing side surfaces of the two second banks separating the pixel region.

[0109] [2. Detailed structure of organic EL device]

[0110] and Figure 6 In the same way as in the case, in the pixel a...

Embodiment approach 3

[0128] In Embodiment 3, grooves connecting adjacent pixel regions are provided on the second banks. With this arrangement, no insulating inorganic film is provided around the bottom surface of the second bank (especially around the groove formed on the second bank).

[0129] That is to say, Figure 10 It is a perspective view showing the structure of the organic EL device of Embodiment 3, and as shown in this figure, the organic EL device 10A has a second bank 240A. A trench 245 that communicates with adjacent pixel regions 300 is formed on the second bank 240A. In addition, in Figure 10 In the figure, in the basic structure of the organic EL device of Embodiment 1 and Embodiment 2, the structure which provided the groove|channel in the 2nd bank is shown.

[0130] The appropriate value of the width of the groove 245 differs depending on the material of the layer provided in the pixel region 300 .

[0131] As in Embodiment 1, when poly(3,4-ethylenedioxythiophene) (referred...

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Abstract

It is an object to provide an organic EL device that, while an interval between pixel regions is set to be small, the thickness of a light emitting layer is made uniform, so that the light emitting efficiency of an organic EL device is improved, and a display apparatus provided with the EL device. An organic EL device (10) is comprised of two or more line-like extending first banks (230), wherein regions formed between neighboring first banks (230) are divided to form pixel regions (300); a plurality of second banks (240), wherein the height of the second bank (240) is lower than that of the first bank (230); a hole transporting layer (250)independently provided for each pixel region (300); and an insulating inorganic film (220) provided at an edge of the pixel region (300) along a side surface opposite to two first banks (230) to partition the pixel regions (300). With this structure, even if the interval between the pixel regions are small, the insulating inorganic film (220) can make a layer in contact with this upper surface flat, so that the layer thickness can be made uniform.

Description

technical field [0001] The present invention relates to an organic EL (Electroluminescent: electroluminescent) device and a display device including the organic EL device. Background technique [0002] Currently, display screens using organic EL elements are widely known. [0003] There are two driving methods for actually causing the organic EL element to emit light: a passive matrix (Passive Matrix) method and an active matrix (Active Matrix) method. Among them, the active matrix method is a driving method based on TFT (Thin Film Transistor). [0004] figure 1 It is a diagram showing the arrangement of light-emitting pixels (passive type) of a conventional full-color organic display. As shown in the figure, the luminescent pixels of the organic display screen have a plurality of luminescent pixels 41, and further have an image display arrangement composed of a plurality of luminescent pixels 41, and the luminescent pixels 41 are arranged in a matrix for red R, green G, ...

Claims

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Application Information

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IPC IPC(8): H05B33/22H01L51/50H05B33/12
CPCH01L27/3246H01L51/5048H01L2251/558H01L27/3283H01L27/3211H10K59/35H10K59/173H10K59/122H10K50/14H10K2102/351H10K85/1135H10K50/15
Inventor 吉田英博山室景成
Owner JOLED INC