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Light-emitting device and display device

A light-emitting device and emission layer technology, which is applied in the direction of lighting devices, electroluminescent light sources, semiconductor/solid-state device manufacturing, etc., can solve the problems of increasing production steps and increasing production costs, and achieve high brightness unit cost, low unit cost, cost reduction effect

Inactive Publication Date: 2005-11-16
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increases the production steps and therefore increases the production cost

Method used

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

Examples

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Comparison scheme
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Embodiment 1

[0104] The EL device according to the first embodiment of the present invention will be described below. Such an EL device 16 having the structure shown in FIG. 1 was produced by the following steps.

[0105] (a) A commercially available non-alkaline glass substrate (hereinafter, “glass substrate”) of 0.635 mm thick and 2.54 cm*2.54 cm (1” square) was used as the substrate 11 .

[0106] (b) Ta and Pt layers were sputtered in the same order on the substrate 11 to form the rear electrode 12 . The lower Ta layer was 30 nm thick, and the upper Pt layer was 200 nm thick.

[0107] (c) By using (Ba, Sr)TiO 3 The dielectric was sputtered for 100 seconds as a sputtering target, and at the same time a high-frequency bias was applied to the substrate 11 to form a seed crystal, the high-frequency bias was stopped, and sputtering was continued for another 60 minutes to deposit a dielectric layer.

[0108] (d) Then, a high-frequency bias was applied to the substrate 11 while sputtering f...

Embodiment 2

[0116] The EL device shown in FIG. 10 was produced by the aforementioned method except for the buffer layer 101.

[0117] Composed of Mg by sputtering on the back electrode 12 0.98 Si 0.02 O as a target to form the buffer layer 101.

[0118] When a 200V, 1-kHz AC voltage of 50 μsec pulse width was applied to the resulting EL device 16, the measured luminance was 524 cd / m 2 .

[0119] The EL device according to the present invention can be produced at low cost while providing high luminance, and thus is widely applicable as a surface-emitting light source in display devices such as those used in digital cameras, mobile phones, PDAs, personal computers, televisions, and automobiles, and used as a backlight for LCD displays.

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Abstract

A light-emitting device having first electrodes, a dielectric layer, a phosphor layer, and second electrodes layered sequentially on a substrate, the dielectric layer is made from a dielectric composed of a crystalline material with a perovskite structure where the lattice constant of the c-axis is greater than the lattice constant of the a-axis obtained by x-ray diffraction.

Description

technical field [0001] The present invention relates to a light emitting device that emits light when a voltage is applied to an inorganic phosphor, and to a display device using the light emitting device. Background technique [0002] A light-emitting device (electroluminescent device, hereinafter referred to as "EL device") using an inorganic phosphor such as zinc sulfide as a light-emitting element is self-emitting and has excellent clarity, wide viewing angle, and fast response characteristics. Due to these characteristics, EL elements are widely suitable for use in television displays, personal computer displays, and other types of display devices. As a result, various proposals have been made to provide practical low-cost, high-brightness EL devices. [0003] A typical EL device has a first electrode layer built on a base substrate, an emissive layer including a dielectric layer and an inorganic phosphor layer, and a second electrode layer. The emission luminance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/62H01L21/316H05B33/22
CPCH01L21/31691H05B33/22H01L21/02197
Inventor 那须昌吾小野雅行青山俊之小田桐优
Owner PANASONIC CORP