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Image display device

An image display device and image information technology, applied in the field of fluorescent films, can solve the problems of good color reproducibility, poor color reproducibility, brightness deterioration, etc., and achieve the effects of good color reproducibility, long life and high brightness

Active Publication Date: 2008-03-12
JAPAN DISPLAY INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the prior art fluorescent film formed of the above-mentioned fluorescent material that is difficult to decompose and has little deterioration in brightness, the light emission color is yellowish and the color reproducibility is poor, and good image quality cannot be obtained when applied to an image display device.
In the fluorescent film using the phosphor of the prior art, it is impossible to obtain a fluorescent film that has high brightness, is difficult to decompose, has little deterioration in brightness, and has good color reproducibility

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0070] A phosphor film used in an image display device having the structure of the present invention was produced by the following method, and its characteristics were evaluated.

[0071] The phosphor used in the present invention was synthesized using, as a raw material, a compound obtained by co-solution or the like containing Sc as a composition. That is, using (La, Sc, Tb) 2 o 3 and SiO 2 as raw material. In addition, as another synthesis method, the same or better results can be obtained even if a compound obtained by eutectic method containing all elements, ie, La, Sc, Tb, and Si elements, is used.

[0072] A predetermined amount of these materials is thoroughly mixed. Put this mixture into an alumina crucible, and sinter at a temperature of 1400° C. or higher for 2 hours or more. The atmosphere during sintering is controlled to obtain good properties. The sintered product is pulverized to obtain phosphor powder having a particle size of about several μm.

[0073]...

Embodiment 2

[0086] A fluorescent film applied to an image display device having the structure of the present invention was produced by the following method, and its characteristics were evaluated.

[0087] The phosphor used in the present invention is synthesized by applying a compound obtained by co-solution or the like containing Lu as a composition to a raw material. That is, using (La, Lu, Tb) 2 o 3 and SiO 2 as raw material. In addition, as another synthesis method, the same or better results can be obtained even if a compound obtained by water precipitation or the like containing all elements, ie, La, Lu, Tb, and Si elements, is used.

[0088] A predetermined amount of these materials is thoroughly mixed. Put this mixture into an alumina crucible, and sinter at a temperature of 1400° C. or higher for 2 hours or more. The atmosphere during sintering is controlled to obtain good properties. The sintered product is pulverized to obtain phosphor powder having a particle size of ab...

Embodiment 3

[0102] A fluorescent film applied to an image display device having the structure of the present invention was produced by the following method, and its characteristics were evaluated.

[0103] The phosphor used in the present invention is synthesized by applying a compound obtained by co-solution or the like containing Lu as a composition to a raw material. That is, using (La, Y, Tb) 2 o 3 and SiO 2 as raw material. In addition, as another synthesis method, the same or better results can be obtained even if a compound obtained by water precipitation or the like containing all elements, ie, La, Y, Tb, and Si elements, is used.

[0104] A predetermined amount of these materials is thoroughly mixed. Put this mixture into an alumina crucible, and sinter at a temperature of 1400° C. or higher for 2 hours or more. The atmosphere during sintering is controlled to obtain good properties. The sintered product is pulverized to obtain phosphor powder having a particle diameter of ...

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Abstract

Existent imaging device involves a problem of low resolution and incapable of satisfying all of long lifetime, high luminance, and favorable color reproduction. The foregoing object can be attained according to the invention in an imaging device having excitation unit of irradiating an excitation energy to a phosphor layer to emit a light, in which at least a portion of a phosphor forming a phosphor layer contains a phosphor having a composition represented by the general formula (La1-x-y-zLnxScyMz)2SiO5 where Ln represents at least one element of Tb and Ce, M represents at least one element of Lu, Y and Gd, and x, y, and z satisfy: 0<x<1, 0<y<1, and 0<z<1.

Description

technical field [0001] The present invention relates to a fluorescent film suitable for image display with high definition, long life, high brightness and excellent color reproducibility. It also relates to an image display device such as an electron beam excitation display using the fluorescent film. Background technique [0002] The image display device in the present invention is a device that displays image information by exciting phosphors to emit light by electron beam irradiation or light irradiation. Such devices include low-speed electron beam display panels (field emission displays (FED) and the like), cathode ray tubes (especially projection cathode line tubes), plasma display panels (PDP) and the like. In addition, the image display device also includes the entire system that displays an image by using the above-mentioned cathode ray tube and panel as a display unit, mounting a drive device, an image processing circuit, and the like. In addition to the above-me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J31/12H01J29/20H01J1/64H01J17/49H01J17/04H04N5/74C09K11/79H01J1/63H01J11/22H01J11/34H01J11/42H01J31/10H01J61/42H01J61/44
CPCH01J31/123H01J29/20H01J11/12H01J11/42C09K11/7774C09K2323/00C09K11/77742
Inventor 今村伸小松正明佐久间广贵
Owner JAPAN DISPLAY INC