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Organic electroluminescence display device

A display device, an organic technology, applied in lighting devices, electrical components, circuits, etc., can solve problems such as screen brightness tilt and large sheet resistance, and achieve the effects of suppressing voltage drop, reducing uneven brightness, and improving display quality

Inactive Publication Date: 2007-10-17
HITACHI DISPLAYS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the electrodes formed of these transparent conductive films have a large sheet resistance, if the upper electrode CD is formed collectively over the entire effective display area AR, a potential gradient will be generated, resulting in a luminance gradient within the screen.

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

[0071] FIG. 1 is an external perspective view of an organic EL display device. Fig. 2 is a cross-sectional view of the organic EL display device of the present invention. (A) of Fig. 2 is a cross-sectional view at the position A-A' of Fig. 1 . (B) of Fig. 2 is a sectional view at the position B-B' of Fig. 1 . Including: TFT substrate, forming organic EL elements and active elements; second substrate SUB2, sealed on the organic EL element of the first substrate SUB1; front frame FF and inner frame BF, installed with the sealing structure of the above-mentioned first substrate SUB1 body; a flexible circuit substrate FPC1 connected to the first substrate SUB1; and a third substrate SUB3 connected to the flexible circuit substrate FPC1.

[0072] An opening is provided in the front frame FF. This opening is slightly larger than the effective display area AR where the organic EL element is formed on the first substrate SUB1, and the lower electrode of the organic EL element can b...

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PUM

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Abstract

An organic electroluminescence display device with high luminescence and high display quality comprises a plurality of active elements, and a plurality of organic electroluminescence elements which produce luminescence through control by the active elements, on a substrate; wherein the organic electroluminescence element has a structure in which a lower electrode, an organic layer, and an upper electrode CD are laminated in this order from the substrate side; the upper electrode CD of the plurality of organic electroluminescence elements is formed as an electrode common to all the organic electroluminescence elements; an electrode is prepared between the upper electrode CD and the organic layer; and the sheet resistance between two points on the upper electrode CD which sandwich the electrode is lower than that between two points which do not sandwich the metal electrode.

Description

technical field [0001] The present invention relates to an organic EL display device. Background technique [0002] Top emission type (hereinafter referred to as "TE type") active matrix organic EL (electroluminescence) display device (hereinafter referred to as "AM-OLED") and the previously developed bottom emission type (hereinafter referred to as "BE" Type") The biggest difference between AM-OLEDs is the emission direction of the light. [0003] The BE type AM-OLED has a lower electrode on the TFT substrate side and a light-emitting layer composed of an organic layer on an active matrix substrate (hereinafter referred to as "TFT substrate") that drives each pixel PXL arranged in a matrix by an active element. The structure of the laminated structure of the functional layer OLBF and the upper electrode CD (hereinafter referred to as "organic EL element"), for each pixel PXL, a transparent conductive film, that is, ITO, is formed as the lower electrode, and the inflow is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32H01L51/50H01L51/52H01L51/54H05B33/26
CPCH01L27/3276H01L27/3246H01L51/5228H10K59/122H10K59/131H10K59/80522H10K50/824
Inventor 坂元博次加藤真一寺门正伦松浦利幸
Owner HITACHI DISPLAYS