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Light-emitting element and display device

A technology of light-emitting components and light-emitting devices, which is applied in the direction of electrical components, static indicators, electric solid devices, etc., can solve the problems of low light extraction efficiency and achieve the effect of improving light extraction efficiency

Inactive Publication Date: 2007-12-05
SEMICON ENERGY LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this totally reflected light is absorbed and attenuated in the light emitting element, so it is proposed that the light extraction efficiency to the outside is low.

Method used

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  • Light-emitting element and display device
  • Light-emitting element and display device
  • Light-emitting element and display device

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0043] In this embodiment mode, a form using a thin-film inorganic light-emitting element, which is one of the light-emitting elements of the present invention, is shown. FIG. 1A shows a cross-sectional view of a display device using a top emission structure. In addition, FIG. 1B shows a cross-sectional view of a display device using a bottom emission structure. In addition, in this specification, a top emission structure refers to a structure in which light emission from a light emitting element is extracted from above (the sealing substrate side). On the other hand, the bottom emission structure refers to a structure in which light emission from a light emitting element is extracted from below (the substrate side on which the light emitting element is provided).

[0044] In the following present embodiment, the only difference between FIG. 1A and FIG. 1B is that the positions of the reflective electrode 103 and the light-transmitting electrode 105 and the positions of the f...

Embodiment approach 2

[0087] In this embodiment mode, a mode in which the present invention is applied to a dispersion-type inorganic light-emitting element which is one of light-emitting elements is shown. FIG. 2A shows a cross-sectional view of a display device using a top emission structure. In addition, FIG. 2B shows a cross-sectional view of a display device using a bottom emission structure. The only difference between FIG. 2A and FIG. 2B is that the positions of the reflective electrode 103 and the light-transmissive electrode 105 are reversed, and the formation order of these parts is also reversed. Therefore, unless otherwise specified, description will be made using FIG. 2A of the top emission structure.

[0088] In Embodiment Mode 1, a structure is described in which the light emitting element 120 is formed between the substrate 101 and the substrate 112, and the light emitting element includes the reflective electrode 103, the first dielectric layer 107, the light emitting layer 104, a...

Embodiment approach 3

[0101] The present embodiment is described with reference to FIG. 3 . In Embodiment Mode 1, the airtight space between the substrate 101 and the substrate 112 is filled with the gas 113 . However, in the display device of the present embodiment, the space is filled with a solid material prepared by filling a liquid material and curing it. A sealed structure of a display device in which a solid material is disposed between substrates is called a solid sealed structure, and this term is sometimes used to distinguish it from a gas-filled structure. In this specification, the term is also used to distinguish solid-filled structures from gas-filled structures.

[0102] According to the procedure described in Embodiment Mode 1, the substrate 101 up to the formation of the light-transmitting electrode 105 is prepared (FIG. 3A). In addition, insulating layer 114 and partition wall layer 115 covering part of reflective electrode 103 are formed on reflective electrode 103 as in the fi...

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Abstract

An object is to provide a light-emitting element having high light extraction efficiency. Further, an object is to provide a light-emitting element and a display device having high luminance and low power consumption. A light-emitting element of the present invention includes a light-emitting layer interposed between a first and second electrodes. The light-emitting element further includes at least a dielectric layer which is interposed between the first and light-emitting layer, and light-scattering fine particles are dispersed in the dielectric layer. Light emitted from the light-emitting layer is extracted to the outside through the first electrode.

Description

technical field [0001] The present invention relates to a light emitting element that emits light by applying electric energy and a display device including the light emitting element. Background technique [0002] In recent years, flat panel displays typified by liquid crystal displays have been improved, and attempts have been made to improve image quality, reduce power consumption, and improve lifespan. However, liquid crystals used in liquid crystal displays do not have self-luminescence. By forming a liquid crystal layer between a pair of substrates, installing a light source (backlight) on one side of the pair of substrates, and using liquid crystals to control light transmission from the light source. pass or block to obtain an image. Therefore, in addition to the control of the liquid crystal itself, a large amount of electric energy is required to use the attached external light source. [0003] Therefore, an electroluminescence (ElectroLuminescence) element (here...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00H01L51/50H01L51/52
CPCG02F1/133603H05B33/22G09G3/3233
Inventor 佐藤阳辅
Owner SEMICON ENERGY LAB CO LTD
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