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Organic electroluminescence display device

An electroluminescence display and display device technology, applied in circuits, electrical components, electrical solid devices, etc., can solve the problems of reduced display performance, reduced luminous intensity, and uneven voltage.

Active Publication Date: 2010-09-29
JOLED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When such a voltage drop occurs, the voltage applied to the stacked structure 123 forming each sub-pixel will be uneven, which remarkably degrades the display performance, thereby reducing the luminous intensity at, for example, the center portion of the display area of ​​the organic EL display device.

Method used

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  • Organic electroluminescence display device
  • Organic electroluminescence display device
  • Organic electroluminescence display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1 relates to the organic EL display device according to the first embodiment of the present invention. A schematic partial cross-sectional view of the organic EL display device of Example 1 is shown in figure 1 , while the arrangement of the stacked structure, auxiliary wiring and insulating layers in the organic EL display device of Example 1 is schematically shown in figure 2 , image 3 and Figure 4 local plan view. The organic EL display device of Example 1 or Example 2 described later is an active matrix type color display organic EL display device which is a top surface emission type. That is, light is emitted through the upper electrode.

[0059] The organic EL display device of Example 1 or Example 2 described later has a plurality (for example, N×M=2880×540) of organic EL elements 10 , 10A. One organic EL element 10, 10A forms one sub-pixel. Therefore, the organic EL display device has (N×M) / 3 pixels. One pixel includes three sub-pixels, whi...

Embodiment 2

[0098] Embodiment 2 relates to an organic EL display device according to a second embodiment of the present invention. A schematic partial cross-sectional view of the organic EL display device of Example 2 is shown in Figure 8 shown.

[0099]In the organic EL display device of Embodiment 2, the portion 42A of the upper electrode 42 located above the auxiliary wiring 45 passes through the two-layer structure layer 61 (shown as one layer in the drawing) including the charge injection layer and the charge transport layer from below. ) are electrically connected to the auxiliary wiring 45. The insulating layer 24 and the auxiliary wiring 45 are provided in common to the plurality of organic EL elements 10A, and the upper electrode 42 covers the stacked structure 43 and the two-layer structure layer 61 forming the plurality of organic EL elements 10A without contacting the insulating layer 24 . In the organic EL display device of Embodiment 2, the lower electrode 21 is used as a...

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PUM

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Abstract

An organic electroluminescence display device is provided. The organic electroluminescence display device includes plural organic electroluminescence elements. Each organic electroluminescence element includes: (A) a lower electrode; (B) an insulating layer having an opening, in which a lower electrode is exposed at the bottom of the opening; (C) an auxiliary wiring; (D) a stacked structure provided from a portion over the lower electrode exposed at the bottom of the opening to a portion of the insulating layer surrounding the opening, including a light emitting layer made of an organic light-emitting material; and (E) an upper electrode. At least one layer of the stacked structure partially contacts the auxiliary wiring. The insulating layer and the auxiliary wiring are provided in common to the plurality of organic EL elements. The upper electrode covers the whole surface of the stacked structures and the auxiliary wiring.

Description

technical field [0001] The invention relates to an organic electroluminescent display device. Background technique [0002] In an organic electroluminescent element (abbreviated as organic EL element) forming an organic electroluminescent display device (abbreviated as organic EL display device), the organic electroluminescent display device uses electroluminescence of an organic material (hereinafter, abbreviated as For EL), a stack structure formed by stacking an organic hole transport layer and an organic light-emitting layer, etc. is provided between the lower electrode and the upper electrode, and attention has been focused on the organic electroluminescence element as it can be driven by a low voltage DC with high luminance Luminous luminous element. [0003] Since the above-mentioned organic EL element has a response speed of 1 microsecond or less, duty driving by a passive matrix system is possible in an organic EL display device. However, when the duty ratio becom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L23/522H01L27/32
CPCH01L23/53295H01L2924/01012H10K50/171H10K50/16H10K50/11
Inventor 柏原充宏山田二郎藤卷宏史藤冈弘文浅木玲生
Owner JOLED INC