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Air exhaust method and apparatus for vacuum-tight sealing of plasma display screen

A technology of plasma display screen and exhaust device, which is applied in the direction of electric tube/lamp exhaust, electrical components, discharge tube/lamp manufacturing, etc. Air difficulties and other problems, to achieve the effect of reducing processing costs, avoiding secondary pollution, and improving the vacuum pumping rate

Inactive Publication Date: 2010-06-09
NANJING HUAXIAN HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to invent a vacuum sealing and exhausting method for plasma display screens in view of the problems of high processing technology requirements, high equipment cost, low efficiency and high energy consumption in the existing sealing and exhausting methods for color plasma displays And device, to solve the current PDP display screen sealing time is too long, the vacuum exhaust is difficult, the problem of low vacuum in the screen

Method used

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  • Air exhaust method and apparatus for vacuum-tight sealing of plasma display screen
  • Air exhaust method and apparatus for vacuum-tight sealing of plasma display screen
  • Air exhaust method and apparatus for vacuum-tight sealing of plasma display screen

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Embodiment 1

[0030] Such as figure 1 , 2 shown.

[0031] A method for vacuum sealing and exhausting a plasma display screen. Firstly, a rear substrate 5 with an address electrode 1, a dielectric layer 2, a MgO protective layer 3, and an exhaust hole 4 in the non-display area and an addressing electrode are formed. Address electrode 6, dielectric layer 7, MgO protective layer 8, and a shadow mask 10 with phosphor powder layer is sandwiched between the front substrates coated with low-melting point glass powder around the sealing frame 9 for alignment and assembly, and used Sealing clamp 11 is clamped, and with a glass exhaust pipe 12 of custom-made size, the trumpet-shaped one end that is coated with sealing ring is fixed on the exhaust hole 4 with clamp, and the other end is used as the vacuum suction interface of PDP display screen (such as attached figure 1 shown). After the PDP display seal is assembled, place it in a specially designed vacuum sealing exhaust furnace 1 (referred to ...

Embodiment 2

[0035] The process of sealing and exhausting is the same as that of Embodiment 1 in the stages of assembly, temperature rise, heat preservation, and temperature drop until the temperature drops to room temperature. At this time, first close the high vacuum valve V1 of the main pumping pipe 5 and all the high vacuum valve groups V6 for air extraction against the screen, open the valve GV1 for filling the vacuum furnace, and fill the vacuum furnace with N 2 Or various inert gases to a pressure of 0.5-2Pa. Close the inflation valve GV1, and open the high vacuum valve group V6-n for pumping air against the screen one by one at a certain interval. If the high vacuum valve V6-n for pumping air against the screen is opened, the vacuum degree drops significantly , it means that the pair of screens is not sealed well, and there is an air leakage point. The valve should be closed immediately. On the contrary, it means that the screen seal is intact. Close all high-vacuum valve groups...

Embodiment 3

[0037] The process of sealing and exhausting is the same as that of the first embodiment when assembling, heating up, keeping warm, and cooling down until the temperature drops to 360°C to 320°C. Only when the temperature of the vacuum furnace drops to 360°C to 320°C, the sealing frame has been solidified at this time. And start the second embodiment to check whether there is a process step of inflating and detecting screen leakage if the screen is not sealed. And open the high vacuum valve group V6 corresponding to all the well-sealed screens, continuously evacuate until the temperature of the vacuum furnace drops to room temperature, and continue to implement the process steps of filling the working gas according to Case 2 until the finished screen is taken out. At the same time, it needs to be added that when the temperature of the vacuum furnace reaches 360 ° C ~ 320 ° C, the vacuum furnace is filled with N 2 Or various inert gases can increase the cooling rate of the vac...

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Abstract

The invention discloses a plasma display screen vacuum seal and exhaustion method and a device thereof, aiming at solving the problems of low vacuum seal and exhaustion efficiency, low vacuum degree inside the screen, which results in impure working gas, and high requirements on the processing technique of seal and exhaustion devices on current color plasma display screens. The invention introduces a vacuum seal and exhaustion furnace to enable a color plasma display screen to be vacuumized so as to get rid of the impurity gas at the time of sealing, and meanwhile, the temperature rising method and the exhaustion method greatly improve pumping speed. The desorption vacuum speed of the gas adsorbed on the display screen is also greatly improved and the vacuum degree of the PDP display screen is greatly improved, nearly improving efficiency by one half. Requirements on processing technique of the seal and exhaustion furnace are lowered, the quality of the PDP display screen is improved and the energy consumption during the production is reduced.

Description

technical field [0001] The invention relates to a manufacturing technology of a plasma display screen, in particular to a method and device for sealing and exhausting a color plasma display screen, in particular to a method and device for vacuum sealing and exhausting a plasma display screen. Background technique [0002] A color plasma display (referred to as a PDP display) mainly includes a front substrate and a rear substrate made of a glass substrate. The front substrate is respectively provided with scanning electrodes, a dielectric layer and a protective layer (MgO); the rear substrate is respectively provided with important addressing electrodes for the scanning electrodes, a dielectric layer, barrier ribs and fluorescent powder. After the front and rear substrates are assembled, sealed and exhausted, a certain proportion of inert gas is filled as the working gas, so as to make a color plasma display. The shadow mask type color plasma display screen is to use the sha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/385H01J9/26H01J9/395
Inventor 张浩康刘少超张雄朱立锋林青园陈刚葛德敏
Owner NANJING HUAXIAN HIGH TECH CO LTD
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