Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rare-earth red luminous material for plasma panel display and non-mercury fluorescent lamp and preparing process thereof

A flat-panel display, plasma technology, applied in luminescent materials, chemical instruments and methods, discharge tube fluorescent screens, etc., can solve the problems of unsuitability for display, poor thermal stability of blue aluminate phosphors and poor resistance to VUV radiation, etc. , to achieve the effect of easy operation, simple preparation method and easy control of conditions

Inactive Publication Date: 2009-02-04
SUN YAT SEN UNIV
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The afterglow of the green phosphor is too long (12.5ms), which is too far from the ideal afterglow time of 1-5ms, and is not suitable for display requirements.
The activated blue aluminate phosphor is mainly poor in thermal stability and resistance to VUV radiation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rare-earth red luminous material for plasma panel display and non-mercury fluorescent lamp and preparing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh anhydrous lithium carbonate (Li 2 CO 3 )0.0739g, europium oxide (Eu 2 o 3 ) 0.3519g, ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) 0.9202g, fully ground in an agate mortar and mixed evenly, kept at 700°C for 30 hours, cooled down to room temperature naturally, took out, and ground in an agate mortar to obtain the final product.

[0017] Measure the excitation spectrum of the plasma panel display (PDP) of the present invention and the rare earth red light-emitting material for mercury-free fluorescent lamps under 590nm monitoring, and find that the light-emitting material has strong absorption at 147nm and 172nm, and the absorption at 172nm Mainly, it shows that the wavelength of light absorbed by the luminescent material in the vacuum ultraviolet region is the same as the wavelength of vacuum ultraviolet light produced by the xenon (Xe)-based rare gas mixed gas plasma widely used in plasma flat panel display devices and mercury-free fluorescent lamps. The g...

Embodiment 2

[0019] Weigh anhydrous lithium carbonate (Na 2 CO 3 )0.1060g, europium oxide (Eu 2 o 3 ) 0.3519g, ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) 0.9202g, fully ground in an agate mortar and mixed evenly, kept at 700°C for 30 hours, cooled down to room temperature naturally, took it out, and ground it in an agate mortar to obtain the final product.

Embodiment 3

[0021] Weigh anhydrous lithium carbonate (K 2 CO 3 )0.1382g, europium oxide (Eu 2 o 3 ) 0.3519g, ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) 0.9202g, fully ground in an agate mortar and mixed evenly, kept at 700°C for 30 hours, cooled down to room temperature naturally, took it out, and ground it in an agate mortar to obtain the final product.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a rear-earth red-light-emitting material used for plasma display panels (PDP) and mercury-free fluorescent lamps. The expression of the chemical composition of the rear-earth red-light-emitting material is as follows: M(RE1-xEux)(PO3)4; wherein, M is alkali metal ion which is selected from Li, Na, K, Rb and Cs; RE is rear earth element which is selected from La<3 plus>, Gd<3 plus>, Y<3 plus> and Lu<3 plus>; Eu<3 plus> is an active ion; and x is the molar percentage content of luminous active ions relative to RE atoms, and the value range is 0.01 equal to or less than x equal to or less than 1.0. The preparation method is simple, and the prepared rear-earth red-light-emitting material used for PDPs and mercury-free fluorescent lamps is activated by vacuum ultraviolet (VUV) light to emit strong red light at 590nm, which is stronger than the red light emitted by the red fluorescent powder (Y, Gd)BO3 : Eu<3 plus> used in the prior plasma display panels, approximately 110 percent of the red light.

Description

technical field [0001] The invention relates to a rare earth luminescent material for PDP (plasma panel display) and a preparation method thereof. Background technique [0002] Plasma display panels (PDP for short) can be made into larger displays and are the best choice for wall-mounted TVs. Mercury-free fluorescent lamps do not contain mercury that is toxic to humans, compared with traditional high-pressure mercury lamps. And low-pressure mercury lamps, which are of great significance from the perspective of environmental protection. Therefore, research on trichromatic phosphors for PDPs and mercury-free fluorescent lamps is very important. [0003] PDP and mercury-free fluorescent lamps work under vacuum ultraviolet photon (VUV) radiation in the range of 100-200nm. The energy of VUV photons is higher than that of 254nm short-wave UV and 365nm long-wave UV photons in the lighting source. The powder has special requirements: (1) high luminous efficiency under the excitati...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K11/81C01B25/45H01J1/63
Inventor 梁宏斌韩冰钟玖平田梓峰苏锵
Owner SUN YAT SEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com