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Vacuum shell of display device

A technology for vacuum enclosures and displays, applied in the direction of cathode ray/electron beam tube casings/containers, discharge lamps, discharge tubes, etc., can solve the problems of inappropriate optical properties, low resin density, and unsuitable for reinforcing parts.

Inactive Publication Date: 2004-01-28
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that a material with a Young's modulus greater than that of glass is not optically suitable as a reinforcement component in the screen area
On the other hand, transparent methacrylic resins have a lower density of about 1.2 g / cm 3
However, due to its Young's modulus as small as 260kgf / mm 2 , so the provided stiffness is not enough
Therefore, it is not suitable as a reinforcement part

Method used

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  • Vacuum shell of display device
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  • Vacuum shell of display device

Examples

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example 1

[0047] figure 1 The structure of a cathode ray tube having a composite layer structure according to the present invention is shown. The basic structure of a cathode ray tube and image 3 Common cathode ray tubes shown. The vacuum housing 2 is composed of a panel 3 displaying images and a funnel 4 . The panel surface 7 on which an image is displayed is composed of a glass layer 21 as an inner layer and a transparent resin layer 22 as an outer layer. The cathode ray tube is of a 29-inch type having a substantially rectangular flat face, in which the screen portion has an aspect ratio of 3:4.

[0048] In this example, the panel 3 and the funnel 4 were manufactured by Asahi Glass Co., Ltd. and Table 1 shows their physical values. As the outer transparent resin layer constituting the panel 3 unit, Parmax (registered trademark) produced by Maxdem in the United States was used. Parmax is a polyphenylene resin with properties such as a glass transition temperature of 160°C and a ...

example 2

[0054] figure 2 The structure of the FED employing the composite layer structure according to the present invention is shown. The FED of this example is a 15-inch type FED having a substantially rectangular planar face in which the screen portion has an aspect ratio of 3:4. The vacuum envelope is basically composed of a front panel 23 that displays an image, a rear panel 24 that is a substrate for an electron emission source that emits electrons in a field emission mode, and an external frame 53 .

[0055] The front panel 23 has a two-layer structure comprising a glass layer 32 as an inner layer and a transparent resin layer 33 as an outer layer. By inserting the external frame, the front panel 23 and the rear panel 24 are sealed with solder glass to provide a hermetic condition. The inner space of the vacuum enclosure maintains more than 10 -8 Torr high vacuum conditions. Cathodes 26 are located on the rear panel 24 in the interior space of the housing and an electron em...

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Abstract

A vacuum envelope for display which reduces a stress and a deflection in a screen area of a panel face portion and has a light weight and which is suitable for a cathode ray tube or a field emission display, wherein the screen area is composed of a complex layer member comprising a glass layer as an inner layer and a transparent resin as an outer layer, and the proportion of the Young's modulus of the transparent resin to the Young's modulus of the glass layer is {fraction (1 / 10)}-[1 / 5].

Description

technical field [0001] The present invention relates to a vacuum envelope of a display device such as a cathode ray tube mainly used for television broadcast signal reception or industrial equipment, or a field emission display unit (hereinafter referred to as FED). Background technique [0002] In ordinary display devices such as cathode ray tubes and FEDs, the kinetic energy of electrons moving at high speed under high vacuum conditions is used to excite phosphorescence. Due to the poor sealing performance of resin materials (although it has the advantage of low density), it is difficult to The portion directly in contact with the inside of the vacuum envelope is formed of a resin material. For materials used inside the vacuum envelope, in addition to maintaining high vacuum conditions, mechanical strength against atmospheric pressure, X-ray absorption properties, electrical resistance properties, thermal resistance properties during manufacturing, and risk of damage by el...

Claims

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Application Information

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IPC IPC(8): H01J29/86
CPCH01J29/863H01J2329/8615H01J2229/8613H01J29/86
Inventor 菅原恒彦西浜二郎鲛岛俊一
Owner ASAHI GLASS CO LTD