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Short tube CRT display tube

A display tube and short tube technology, which is applied in the field of vacuum display tube devices, can solve the problem that the CRT display tube cannot be used in a low focusing voltage system, and achieves the effects of high resolution, reduced ignition and small size

Pending Publication Date: 2020-11-10
SICHUAN TIANWEI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a short-tube CRT display tube to solve the problem that the existing CRT display tube cannot be used in a low focus voltage system

Method used

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  • Short tube CRT display tube

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Effect test

Embodiment 1

[0034] A short-tube CRT display tube, comprising a glass bulb, the glass bulb includes a glass slide part, a glass funnel part, and a glass tube part sealed in sequence, an electron gun is installed in the glass tube part, and the stem of the electron gun is connected with a Filament, the stem of the electron gun is connected with a grid lead, the glass tube part is provided with a graphite layer, the glass funnel part is provided with an aluminum layer, the glass slide part is provided with a phosphor layer, and the graphite layer and The aluminum layer is connected, the glass funnel is also provided with an anode cap, the anode cap is connected with the aluminum layer, the anode cap is connected with an external high-voltage lead wire, and the anode cap is coated with a graphite layer.

Embodiment 2

[0036] On the basis of Embodiment 1, the gate leads are arranged in multiple groups.

Embodiment 3

[0038] Based on the above embodiment, the length of the electron gun is 40mm.

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Abstract

The invention discloses a short tube CRT display tube, belongs to the technical field of vacuum display tube devices, aims to provide the short-tube CRT display tube, and solves the problem that an existing CRT display tube cannot be used in a low-focusing-voltage system. The short tube CRT display tube comprises a glass shell, the glass shell comprises a slide part, a glass cone part and a glasstube part which are sequentially connected in a sealed mode, an electronic gun is installed in the glass tube part, and a stem of the electronic gun is connected with a lamp filament. The stem of theelectronic gun is connected with a grid lead, a graphite layer is arranged in the glass tube part, and an aluminum layer is arranged in the glass cone part. The slide part is provided with a fluorescent powder layer, the graphite layer is connected with the aluminum layer, and the glass cone part is also provided with an anode cap. The anode cap is connected with the aluminum layer, the anode capis connected with an external high-voltage lead, and the anode cap is coated with the graphite layer. The invention is suitable for the short tube CRT display tube.

Description

technical field [0001] The invention belongs to the technical field of vacuum display tube devices, in particular to a short tube CRT display tube. Background technique [0002] The CRT display tube is a vacuum display tube device, which is usually used as a display source on the aircraft head-up display system for the pilot to watch the displayed picture. The existing long-tube CRT display tube has a length of 163mm and a focus voltage of 3-3.5KV, which cannot be used in a low focus voltage system. This is because after the electron gun of existing long-tube CRT display tube shortens the whole tube length, the focusing pole system position on the electron gun will be closer to the anode on the cone. The voltage difference between poles becomes larger, which is easy to cause high-voltage ignition, so it cannot be applied to low-focus voltage systems. Contents of the invention [0003] The object of the present invention is to provide a short-tube CRT display tube to solv...

Claims

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Application Information

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IPC IPC(8): H01J31/12H01J29/48H01J29/86H01J29/88
CPCH01J29/485H01J29/861H01J29/88H01J31/123H01J2229/48H01J2229/8606H01J2229/88
Inventor 宗美强李慧海曾泸王春林兰先金
Owner SICHUAN TIANWEI ELECTRONICS
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