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Bonding method for vent pipe of display panel

A display panel and bonding method technology, which is applied in the manufacture of electrical components, cold cathode tubes, discharge tubes/lamps, etc., and can solve problems such as display panel leakage and vent tube cracks

Inactive Publication Date: 2009-06-10
HITACHI CONSUMER ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the case where the vent tube has the above-mentioned structure, the bottom surface of the flange portion of the vent tube having a substantially flat end surface is in direct contact with the glass substrate, for example, when a foreign object is caught between them, after pressing with a press tool In the event of misalignment, etc., the end surface of the vent tube will be cracked, and in this case, the leakage of the display panel will be caused in the subsequent heat treatment process.

Method used

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  • Bonding method for vent pipe of display panel
  • Bonding method for vent pipe of display panel
  • Bonding method for vent pipe of display panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039] 1 to 3 are diagrams illustrating a method of joining an air duct of a display panel according to Embodiment 1 of the present invention.

[0040] First, as shown in FIGS. 1( a ) to 1 ( c ), a vent pipe 1 (refer to Figure 1(a)).

[0041] A gasket-shaped (flat annular) buffer member 8 is temporarily joined to the end surface 2 a of the flange portion 2 of the vent pipe 1 . The buffer member 8 is formed by applying low-melting-point glass glue (see FIG. 1( b )) composed of low-melting-point glass frit, binder resin, and solvent (see FIG. 1( c )).

[0042] Next, as shown in FIG. 2( a), the ring-shaped joining member 3 and the ring-shaped pressing auxiliary member 5 are sequentially arranged from one end side in the order of the annular joining member 3 and the annular pressing auxiliary member 5 having a softening temperature higher than that of the joining member 3. The member 5 is temporarily joined to the periphery of the flange portion 2 of the vent tube 1 to prelimina...

Embodiment approach 2

[0062] 7 is a diagram illustrating a method of joining an air duct of a display panel according to Embodiment 2 of the present invention.

[0063] In this embodiment, a member in which the cushioning member 8 and the joining member 3 of Embodiment 1 are integrated is used as the cushioning joining member 9 . The buffer joint member 9 is formed using the same material as the joint member 3 of the first embodiment.

[0064] First, as shown in Fig. 7(a) to Fig. 7(c), use the same vent pipe 1 as that of Embodiment 1 (refer to Fig. 7(a)); The engaging member 9 is mounted on the periphery of the flange portion 2 of the vent pipe 1 . Next, the breather tube assembly 4 in which the same pressing assisting member 5 as in the first embodiment is temporarily joined to the buffer joint member 9, and the buffer joint member 9 and the pressing assisting member 5 are attached to the breather tube 1 to be integrated is prepared in advance. (Refer to FIG. 7(b)).

[0065] Figure 8 (a) and ...

Embodiment 1

[0076] Prepare a flange-shaped breather tube with one end of the glass tube processed into a substantially flat end surface, low-melting glass frit for cushioning parts, and ring-shaped joint parts and pressing auxiliary members.

[0077] The softening point of the ring-shaped joining member is about 380°C, the softening point of the pressing auxiliary member is about 500°C, and the softening point of the low-melting glass frit for the cushioning member is about 410°C.

[0078] First, low-melting-point glass frit for forming a cushioning member was coated on the end face of the flange portion of the vent pipe. In this coating process, a dispensing method or a method of applying with a spatula is used. The thickness of the formed coating film is 200 μm to 500 μm, and the pattern width is about 1 mm.

[0079] Next, the snorkel coated with the low-melting-point glass frit for the cushioning member is temporarily fired to remove the resin component in the low-melting-point glass ...

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Abstract

The bonding method for a vent pipe of a display panel includes the step of preparing the bonding member on the periphery of the flange portion of the vent pipe, the step of interposing a buffer member made of a low-melting point glass flit having a softening temperature higher than that of the bonding member between a contact face to the display panel of the flange portion of the vent pipe and the display panel, and, in a state in which the flange portion of the vent pipe is pressed onto the display panel face by a pressing member so that the vent pipe is fixed, the step of heating the bonding member and the buffer member to a temperature to be softened so that the flange portion of the vent pipe is bonded to the display panel through the fused bonding member.

Description

technical field [0001] The present invention relates to a bonding method of a vent pipe of a display panel, and more particularly to a method for extracting impurity gas from a discharge space in a panel of a display panel such as a PDP (Plasma Display Panel) or filling a discharge space with a discharge gas. How to join the vent pipe. Background technique [0002] Generally, in a display panel such as a PDP, a discharge space is formed inside by arranging a front-side substrate and a rear-side substrate facing each other and sealing the surroundings. [0003] When manufacturing the above-mentioned display panel, usually, vent holes are provided on the substrate on the back side, and when the substrate on the front side is heated / sealed and the substrate on the back side is sealed, a glass vent tube (also called an exhaust tube) is bonded. or leak tube) so that it covers the vent hole. Then, the impurity gas is extracted from the inside of the panel through the vent tube, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/26H01J17/18H01J17/16H01J17/49
Inventor 藤本晃广松冈康博石丸宽典福井稔
Owner HITACHI CONSUMER ELECTRONICS CORP