Image display device

An image display and device technology, applied in image/graphic display tubes, electrical components, cold cathodes of discharge tubes, etc., can solve the problems of low brightness and insufficient anode power supply, and achieve the effect of large selection of materials and preventing voltage reduction.

Inactive Publication Date: 2007-09-19
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2003-242911 However, in the above-mentioned image display device, when there are defects such as cut-offs in the inner layer of the metal or cut-off due to damage, the power supply to the anode is insufficient due to discharge, and dark lines with low brightness occur.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0042] The image display device of Example 1 is shown in FIG. 3 . On the inner surface of the front plate 11 made of glass, a fluorescent surface 17 is formed through an ITO transparent electron conducting film (200 nm thick) 16 functioning as an anode feeder wiring. An anode power supply terminal (not shown) connected to the transparent electronically conductive film 16 is connected to the inner surface of the front plate 11 . The phosphor surface 17 has a phosphor layer 18 formed on the front plate 11 that respectively emits red (R), green (G), and blue (B) light, and at least a part of which also serves as a resistive material layer arranged in a matrix. A light absorbing layer (shading layer) 19 with a thickness of 10 μm. Here, the resistance value of the light-shielding layer 19 that doubles as a resistive material layer is set to about 1×10 4 Europe. A metal back layer 20 made of aluminum (Al) with a thickness of 80 nm is formed in a rectangular shape on the fluoresce...

Embodiment 2

[0045] The image display device of embodiment 2 constitutes as shown in Figure 4, gets at least a part to double as the thick 5 micron light-shielding layer 19 of anode power supply wiring, and forms the thick 10 micron resistance material layer (resistance value is about 1 * 10 4 Europe) 23, so that it covers the light-shielding layer 19. Furthermore, an anode power supply terminal (not shown) connected to the light-shielding layer 19 serving also as the anode power supply wiring is connected to the inner surface of the front plate 11 . The light-shielding layer 19 and the metal backing layer 20 are arranged to face each other with the resistive material layer 19 interposed therebetween.

[0046] According to Example 2, the same effect as that of Example 1 is obtained.

Embodiment 3

[0048] The structure of the image display device of Example 3 is shown in FIG. 5 . On at least a part of the light-shielding layer 19, an anode power supply wiring 24 with a thickness of 5 micrometers is stacked, and the resistance value is about 1×10. 4 The resistive material layer 23 is 10 micrometers thick so as to surround the anode power supply wiring 24 . An anode power supply terminal (not shown) connected to the anode power supply wiring 24 is connected to the inner surface of the front plate 11 . The anode power supply wiring 24 and the metal backing layer 20 are arranged to face each other with the resistive material layer 23 interposed therebetween.

[0049] According to Example 3, the same effect as that of Example 1 is obtained.

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Abstract

An image display device is provided with a front plate (11) and a rear plate. The front plate is provided with a phosphor screen (17), which includes a phosphor layer and a light blocking layer, and a metal back layer (20) which is provided to overlap the phosphor screen and is an anode electrode for electron excitation of the phosphor layer. The rear plate is arranged to face the front plate with an electron emitting element arranged thereon for emitting electrons to the phosphor screen. On the front plate, an anode power supply terminal and an anode power supply wiring (16) connected to the metal back layer are formed. The anode power supply wiring (16) is formed closer to the front plate (11) than the metal back layer (20), and the anode power supply wiring (16) is connected to the metal back layer (20) through a resistant material layer (19).

Description

technical field [0001] The present invention relates to an image display device, and more particularly to an image display device having a structure in which a fluorescent surface and a metal back layer are formed on a front plate side to improve brightness. Background technique [0002] In recent years, as a next-generation image display device, development of a planar image display device in which a plurality of electron emission elements face an image display surface has been progressed. There are various types of electron emission elements, but all basically utilize electron emission caused by an electric field. An image display device using these electron emission elements is generally called a field emission display (hereinafter referred to as FED). An image display device using surface conduction type electron emission elements in such an FED is called a surface conduction type electron emission display (hereinafter referred to as SED), but the term FED is used as a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J31/12H01J29/28
CPCH01J31/127H01J29/085H01J29/90H01J1/30H01J29/28H01J31/12
Inventor 田中肇稻村昌晃
Owner KK TOSHIBA
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