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Spher-supported thin film phosphor electroluminescent devices

A luminescent material layer, electroluminescent display technology, applied in luminescent materials, electroluminescent light sources, electro-solid devices, etc., can solve the problem of no major improvement in brightness or stability

Inactive Publication Date: 2006-11-15
NANOLUMENS ACQUISITION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although improved encapsulation techniques have been developed to reduce moisture penetration, there have been no major improvements in brightness or stability since the 1950s

Method used

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  • Spher-supported thin film phosphor electroluminescent devices
  • Spher-supported thin film phosphor electroluminescent devices
  • Spher-supported thin film phosphor electroluminescent devices

Examples

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Effect test

Embodiment Construction

[0062] The inventors have shown for the first time that it is possible to use dielectric spheres, preferably BaTiO 3 Sphere Fabrication of thin film phosphor electroluminescent devices for use in electroluminescent (EL) display devices. The device has a new structure and was fabricated through a specific processing route to allow for the high-temperature annealing process required to apply the balls into a low-temperature substrate.

[0063] Figure 5 Schematic showing the proposed structure of a sphere-loaded thin-film electroluminescence (SSTFEL) device. Phosphor layer 4 was deposited on BaTiO 3 on the top surface of ball 3. In a preferred embodiment, thin SrTiO 3 Layer 5 is deposited on the phosphor layer for efficient charge injection into the phosphor layer. BaTiO 3 The spheres are embedded within the polymer layer 2, where BaTiO 3 The upper and bottom areas of the ball are exposed. BaTiO 3 The upper region of the ball and the surrounding polymer are coated with ...

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Abstract

The present invention provides an electroluminescent display device using dielectric spheres embedded in a flexible electrically conducting substrate. Each of the spherical dielectric particles has a first portion protruding through a top surface of the substrate and a second portion protruding through the bottom surface of the substrate. An electroluminescent phosphor layer is deposited on the first portion of each spherical dielectric particles and a continuous electrically conductive, substantially transparent electrode layer is located on the top surfaces of the electroluminescent phosphor layer and areas of the flexible electrically insulating substrate located between the top surfaces of the electroluminescent phosphor layer. A continuous electrically conductive electrode layer coated on the second portion of the spherical dielectric particles and areas of the flexible, electrically insulated substrate located between the second portions of the spherical dielectric particles.

Description

[0001] Cross References to Related US Patent Applications [0002] This patent application claims priority to US Provisional Patent Application entitled "Ball-Loaded Thin Film Phosphor Electroluminescent Devices," filed September 5, 2003, which is incorporated herein by reference. technical field [0003] The present invention relates to materials and structures of thin film electroluminescent devices, more particularly the present invention relates to sphere-supported thin film phosphorelectroluminescent devices loaded with spheres. Background technique [0004] Thin-film electroluminescent (TFEL) devices typically consist of layered stacks of thin films deposited on insulating substrates. These thin films include a transparent electrode layer and an electroluminescent (EL) layer structure comprising an EL phosphor sandwiched between a pair of insulating layers. A second electrode layer completes the layered structure. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L29/00C04B35/44C04B35/468C04B35/547C09K11/59C09K11/62C09K11/66C09K11/77G09F9/33H01L25/075H01L33/00H05B33/14H05B33/22H05B33/26
CPCC04B35/01C04B35/16C04B35/44C04B35/4682C04B35/547C04B2235/3205C04B2235/3208C04B2235/3215C04B2235/3217C04B2235/3224C04B2235/3262C04B2235/3284C04B2235/3286C04B2235/3287C04B2235/3418C04B2235/528C04B2235/5436C09K11/595C09K11/621C09K11/662C09K11/666H01L25/0753H05B33/22H05B33/26H01L2924/0002H01L2924/00
Inventor 阿德里安·基泰相英伟布莱恩·J.·考克斯
Owner NANOLUMENS ACQUISITION
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