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light emitting device

A technology for light-emitting devices and substrates, applied in lighting devices, electroluminescent light sources, light sources, etc., can solve the problems of uneven brightness and uneven light-emitting pixels.

Active Publication Date: 2021-04-09
FUTABA CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, planarization layers formed of organic materials tend to carry moisture
Therefore, if the organic EL element is placed on the planarization layer, moisture will infiltrate into the organic EL element from the planarization layer containing water, and non-uniform light emission or uneven brightness of light-emitting pixels will easily occur.

Method used

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Examples

Experimental program
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Effect test

no. 1 approach

[0027] The light emitting device of this embodiment is an active driving type light emitting device. Examples of the light emitting device include an optical print head that emits light for exposing a photosensitive medium, an illuminating device that emits light for illumination, and a display device that displays signage or segment graphics. The shape of the light-emitting device is not particularly limited, and elongated straight lines, curves, spirals, and the like can be employed. In this embodiment, as an example, a case where the light emitting device is formed in a rectangular shape in plan view will be described.

[0028] Such as figure 1 As shown, the light-emitting device 1 of this embodiment is formed in a rectangular shape in plan view. The direction in which the long side 1a of the light emitting device 1 extends (the direction in which the pair of short sides 1b, 1b face each other) in plan view is referred to as the long side direction D1, and the direction i...

no. 2 approach

[0054] The second embodiment is basically the same as the first embodiment, and differs from the first embodiment only in the structure of the organic insulating layer. Therefore, in the following, only the content different from the first embodiment will be described, and the same content as the first embodiment will be omitted.

[0055] Such as Figure 5 ~ Figure 7 As shown, the light emitting device 1A of this embodiment includes a first substrate 2 , a second substrate 3 , an adhesive 4 , an organic EL element 5 , an organic insulating layer 6A, a driving circuit 7 , a planarizing layer 8 and a desiccant 9 . in addition, Figure 5 yes Figure 6 and Figure 7 The sectional view of the light-emitting device 1A taken along the line V-V is shown.

[0056] The organic insulating layer 6A is a layer corresponding to the organic insulating layer 6 of the first embodiment. The function and material of the organic insulating layer 6A are the same as those of the organic insula...

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Abstract

The light-emitting device of the present invention includes: a first substrate (2); on the first substrate (2), a lower electrode (11), an organic EL layer (12) and an upper electrode (13) are sequentially arranged on the first substrate (2) from the side of the first substrate (2) The resulting organic EL element (5); a drive circuit (7) configured on the first substrate (2) and used to drive the organic EL element (5); formed of an organic material and covering the drive circuit (7) to be buried a concave-convex planarization layer (8) of the driving circuit (7); and an organic insulating layer (6) formed of an organic material and covering the corners of the lower electrode (11) to delineate the light-emitting pixels (A), wherein the driving circuit (7) It is provided corresponding to each light-emitting pixel (A), and the planarization layer (8) is arranged at a position away from the organic EL element (5) in plan view.

Description

technical field [0001] The present invention relates to a light emitting device using an active drive type organic EL element. Background technique [0002] In general, in a light-emitting device using an active-drive type organic EL element, an organic EL element constituting a light-emitting pixel corresponds to a drive circuit (thin-film transistor) for driving the organic EL element on a one-to-one basis. In such a light-emitting device, the unevenness of the driving circuit arranged on the substrate is filled with the planarization layer, and the organic EL element is arranged on the planarization layer. The drive circuit and the organic EL element are electrically connected through via holes formed in the planarization layer (for example, refer to Patent Document 1). [0003] Patent Document 1: Japanese Patent Laid-Open No. 2009-087951 [0004] In general, the planarization layer is formed of an organic material in order to fill the unevenness of the drive circuit an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50
CPCH05B33/02H05B33/06H05B33/04H10K59/00
Inventor 藤村洋平宫健太河西豪辉梶山力
Owner FUTABA CORPORATION