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Phosphor, fluorescent lamp using the same, and display device and illuminating device using fluorescent lamp

A technology of phosphors and fluorescent lamps, applied in the field of yttrium vanadate, which can solve the problems of reducing brightness and achieve the effects of improving brightness, wide color gamut, color reproducibility and brightness

Inactive Publication Date: 2009-01-07
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, when the color gamut is expanded, the emission wavelength of the phosphor contributing to the emission of the blue light component and the emission wavelength of the phosphor contributing to the emission of the red light component are changed to shorter wavelengths and longer wavelengths, respectively, thereby reducing brightness in a direction away from human visibility

Method used

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  • Phosphor, fluorescent lamp using the same, and display device and illuminating device using fluorescent lamp
  • Phosphor, fluorescent lamp using the same, and display device and illuminating device using fluorescent lamp
  • Phosphor, fluorescent lamp using the same, and display device and illuminating device using fluorescent lamp

Examples

Experimental program
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Effect test

Embodiment

[0074] Phosphors were synthesized according to the following steps: Weighing a predetermined amount of Y used as a raw material 2 o 3 , V 2 o 5 、Eu 2 o 3 , Tb 4 o 7 and Sm 2 o 3 , and mixed it in ethanol by a ball mill system. The resulting mixture was filtered, dried, placed in a quartz crucible, and then calcined at 1100° C. in air for 2 hours. After calcination, the mixture is rinsed with alkaline solution and water and dried.

[0075] Thus, phosphor YVO doped with 10ppm to 5000ppm of Tb was synthesized. 4 : Phosphor YVO doped with Eu and Sm from 50ppm to 25000ppm 4 :Eu. As a comparative example, phosphor YVO without doping Tb or Sm was synthesized 4 :Eu.

[0076] figure 1 is shown that in the example of the present invention, Tb-doped YVO 4 : Comparison diagram of the results of the correlation between brightness and intensity of excitation light irradiation between Eu and common phosphors;

[0077] figure 1 is shown by irradiating Y with 254 nm UV light ...

example

[0117] To improve YVO 4 : The brightness saturation phenomenon of Eu and increase its brightness, adding a small amount of Tb or Sm to YVO 4 : Eu.

[0118]

[0119] figure 2 It is shown that in the example of the present invention, the preparation of YVO for the synthesis of doped Tb 4 : Table of raw materials of Eu.

[0120] Figure 8 is to show that in the example of the present invention, the preparation for the synthesis of YVO doped with Sm 4 : Table of raw materials of Eu.

[0121] Such as figure 2 and Figure 8 shown, using Y 2 o 3 (purity 99.9%), V 2 o 5 (purity 99.99%) and Eu 2 o 3 (purity 99.9%) as a synthetic raw material. For Tb and Sm to be added, use Tb 4 o 7 (purity 99.99%) and Sm 2 o 3 (purity 99.9%) as raw material.

[0122] according to figure 2 and Figure 8 These materials were mixed in the indicated mixing amounts. In addition, as a comparative example, a sample not doped with Tb or Sm was prepared. Add V at a stoichiometric rat...

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Abstract

The present invention discloses a phosphor which has high brightness and improved luminance saturation, a fluorescent lamp using the phosphor and a display and an illuminating device thereof using the fluorescent lamp, wherein the phosphor comprises Eu-activated YVO4:Eu doped with 10ppm to 3,000ppm of Tb and / or 50ppm to 4,500ppm of Sm. The brightness of light emitted by ultraviolet excitation is higher than that of undoped YVO4:Eu.

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter related to Japanese Patent Application JP 2007-177308 filed in the Japan Patent Office on Jul. 5, 2007, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to europium-activated yttrium vanadate (YVO) doped with Tb and / or Sm 4 :Eu), use the YVO 4 : Fluorescent lamps of Eu, and displays and lighting devices using the fluorescent lamps. Background technique [0004] Fluorescent lamps are used as backlights for liquid crystal displays of TVs and PCs, and are coated with various phosphors. These phosphors are also used in various displays other than liquid crystal displays. [0005] In order to compete with plasma display panels (PDPs) and other flat panel displays (FPDs), etc., liquid crystal displays (LCDs) need to be further differentiated. A big factor of difference is image quality, and there is fierce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78H01J61/44
CPCC09K11/7794C09K11/7787
Inventor 楠木常夫川又政明五十岚崇裕田村孝大野胜利
Owner SONY CORP