KR200302669Y1 - Exhaust Pipe of Plasma Display Device - Google Patents

Abstract

The present invention discloses an improved exhaust pipe of a PDP.

Conventionally, the exhaust pipe is configured in the form of a customary funnel attached to a mandrel type funnel, and is easily damaged by external force, and vortices are generated during intake and exhaust, and getters flow.

The present invention solves the conventional problems by bringing the end of the tubule closer to the exhaust hole side than the end of the funnel.

Description

Exhaust Pipe of Plasma Display Device

The present invention relates to a plasma display panel (PDP), and more particularly to an exhaust pipe.

As shown in FIG. 1, the PDP, which is a flat panel device using gas discharge phenomenon, is formed by injecting and charging a discharge gas into two substrates P1 and P2 on the front and rear sides, and sealing the electrodes formed on both substrates P1 and P2. The image is displayed by selecting (not shown).

In order to exhaust and charge the PDP, an exhaust pipe (X) is attached to the exhaust moor (H) formed at an ineffective portion of the rear substrate (P2). Generally, the exhaust pipe (X) is formed of a funnel-shaped funnel (F) and thinner. It consists of a glass product provided with a tubular tube (L), and when the exhaust and injection is completed, the middle, one-dot chain position of the tubular tube (L) is heat-sealed to seal the PDP.

The role of the funnel (F) is to support the exhaust pipe (X) when attached to the back substrate (P2) and to reinforce the exhaust pipe (X) against the impact during heating or exhaust injection. In addition, the rapid pressure change during exhaust injection is buffered so as not to be directly transmitted to the internal space of the PDP, and the extra lifetime of the PDP is extended by storing an extra discharge gas to mitigate the influence of the internal pollution of the PDP.

On the other hand, since the PDP is a discharge element, the electrode is easily damaged by the ion bombardment of the plasma. In particular, since the electrode is severely damaged in the DC-type PDP, it is preferable to form an appropriate protective layer on the surface of the electrode. To this end, a protective layer such as Hg is formed on the surface of the electrode, which is generally referred to as a getter (G) and is housed in a ring-type container and installed inside the funnel F of the exhaust pipe (X). .

However, the getter G flows due to the negative pressure during exhausting through the exhaust pipe X, and thus is likely to be out of the fixed position. Then, the getter G has a relative position with a high frequency coil or the like for induction heating the getter G from the outside. Defects such as the getter G not spread out easily tend to occur.

On the other hand, in the conventional exhaust pipe (X), the flow of gas through the exhaust hole (H) and the tubule (L) forms a vortex around the funnel (F), making exhausting and filling difficult, thus achieving the required vacuum degree. This difficulty causes a problem of lowering the purity of the injection discharge gas, and the length of the tubular tube L is too long to be damaged during handling, and dust and foreign matter easily enter the PDP.

Accordingly, it is an object of the present invention to provide an exhaust pipe free from the getter, shorten the length of the customs, and advantageous for damage and contamination.

1 is a partial cross-sectional view showing a conventional PDP exhaust pipe,

2 is a partial cross-sectional view showing one configuration of a PDP exhaust pipe according to the present invention;

3 is a partial cross-sectional view showing another configuration of the PDP exhaust pipe according to the present invention;

Figure 4 is a partial cross-sectional view showing another configuration of the PDP exhaust pipe according to the present invention.

<Description of symbols used in the main part of the drawing>

P1, P2: front and back substrate 1: exhaust pipe

2, 2 ', 2 ": Funnel 3: Customs

H: exhaust hole G: getter

Exhaust pipe according to the present invention for achieving the above object;

In the exhaust pipe of the PDP consisting of a funnel and customs, the end of the customs is extended to enter the exhaust hole.

According to this configuration, the getter may be installed between the end of the tubule and the funnel, thereby preventing the flow of the getter and reducing the length of the tubule. In addition, it can be supported by the middle of the customs, not the end of the customs, which is resistant to damage, and foreign matter such as dust does not directly enter the inside of the PDP.

EXAMPLE

Such specific features and advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

In FIG. 2, the exhaust pipe 1 attached to the PDP panel having the same configuration as that of FIG. 1 includes a funnel-type funnel 2 and a customs tube 3 as in the prior art, and according to the features of the present invention, the end of the customs tube 3. The getter G is provided between the periphery of the tubule 3 and the funnel 2 so as to extend closer to the exhaust hole H side than the end of the additional exhaust pipe 1.

Here, the end of the tubular pipe (3) enters the exhaust hole (H) inside, so that the exhaust gas negative pressure or discharge gas through the tubular pipe (3) is directly transferred to the discharge space (V) between the two substrates (P1, P2) do. As a result, the discharge of the discharge space V and the injection of the discharge gas thereto are very smooth.

In order to further improve the exhaust and filling efficiency, the end of the tubule 3 can enter the discharge space V. In this case, the height of the discharge space V, which is only a few hundred μm, and the end of the tubule 3, Since it is pervasive to set correctly, it is enough to enter the inside of the exhaust hole H as shown.

According to such a configuration, the customs 3 is supported by the funnel 2 in the middle thereof, unlike the conventional art. Accordingly, the required length of the customs (3) is shortened and the risk of damage due to high support strength when the external force is applied is reduced.

In addition, the space between the funnel (2) and the tubule (3) is separated from the gas flow at the time of exhaust and filling, so that the getter (G) does not flow, so that the getter (G) can be accurately diffused.

The funnel 2 of FIG. 2 is in the form of a funnel as in the prior art. In the embodiment of FIG. 3, the funnel 2 ′ is configured to have a hemispherical shape. This configuration further improves the strength of the exhaust pipe 1 against external force and lowers the height of the remaining portion of the tubular pipe 3 during heat fusion, thereby facilitating the assembly and handling of the finished PDP panel.

2 and 3 can be configured by joining the tubules 3 through the funnels 2 and 2 'so that the construction is relatively simple, but the distribution of stress is discontinuous, rather than the conventional configuration of FIG. Although strong in breakage, there is a risk of breakage.

Accordingly, the embodiment of FIG. 4 is configured such that the end of the tubular tube 3 enters the inside of the funnel 2 ″ by bending in two stages to form a continuous exhaust pipe 1. The exhaust pipe 1 of such a configuration may be formed by directly forming a glass, or attaching a tubule 3 to the molded two-stage curved funnel 2 ″, or the funnel 2 of the exhaust pipe 1 as shown in FIG. 1. It can be configured by a method of softening the heat and softening the tubules (3).

Such a configuration of Figure 4 has all the advantages of the embodiment of Figures 2 and 3 has a more excellent effect of preventing damage to the exhaust pipe 1 by external forces such as external contact of the long customs (3).

As described above, according to the present invention, the exhaust efficiency is improved, the damage of the exhaust pipe is prevented, the getter can be accurately diffused, the residual area is small, and the PDP internal pollution is reduced.

According to a preferred feature of the present invention, the end of the tubular tube extends into the exhaust hole, more preferably, to the discharge space between the two substrates, whereby better exhaust and filling efficiency can be achieved.

Claims (6)

In the exhaust pipe which is attached to the exhaust hole (H) of the back substrate of the plasma display element and consists of a funnel and tubules, The exhaust pipe of the plasma display device, characterized in that the end of the tubular tube (3) extends to enter the exhaust hole (H). The method of claim 1, The tubule 3 passes through the funnels 2, 2 'such that the funnels 2, 2' support the middle of the tubule 3; An exhaust pipe of a plasma display device. The method of claim 2, The funnel 2 is formed in the form of funnel An exhaust pipe of a plasma display device. The method of claim 2, The funnel 2 'is formed to be hemispherical An exhaust pipe of a plasma display device. According to claim 1, wherein the funnel (2 ') is hemispherical and is formed to be bent from the center to the inside, the end of the tubular (3) is formed integrally in contact with the inside of the hemispherical funnel (2') formed by bending. An exhaust pipe of the plasma display device, characterized in that. The method of claim 1, The getter G is installed in the form of a ring in the space between the tubule 3 and the funnels 2, 2 ', 2' '. An exhaust pipe of a plasma display device.