JP3991689B2 - Gas discharge display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas discharge display panel used for image display such as a television and an advertisement display panel.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as shown in FIG. 2, a gas discharge display panel (hereinafter referred to as a panel) has a surface substrate 1 made of a transparent glass substrate on which display electrodes and the like are formed, and electrodes are formed so as to be orthogonal to the display electrodes. In addition, a rear substrate 2 made of a glass substrate on which barrier ribs and phosphor layers are formed is disposed so as to be opposed to each other so that a discharge space 3 is formed therebetween, and a peripheral portion between the front substrate 1 and the rear substrate 2 is disposed. It is configured by sealing with a frit 4 as a sealing member and enclosing a discharge gas in the internal discharge space 3.
[0003]
Further, an introduction hole 5 for exhausting impure gas in the discharge space 3 and introducing discharge gas is provided at an end of the back substrate 2, and an exhaust pipe 6 is provided at the position of the introduction hole 5 with a frit 7. Are joined by. In addition, a getter exhaust hole 8 is provided at another end portion of the back substrate 2, and a getter valve 10 that forms a getter chamber 9 communicating with the discharge space 3 through the getter exhaust hole 8 is joined by a frit 7. . Reference numeral 11 denotes a getter material accommodated in the getter chamber 9.
[0004]
As shown in FIG. 3, this panel is first heated at a frit firing temperature of, for example, about 500 ° C. in the air in a sealing step in which the front substrate 1 and the rear substrate 2 are arranged to face each other and the periphery is sealed. As a result, the frit 4 and 7 are fired together, and the front substrate 1 and the rear substrate 2, the rear substrate 2 and the exhaust pipe 6, and the rear substrate 2 and the getter valve 10 are joined in an airtight state.
[0005]
Thereafter, a getter material 11 such as a ZrV (zirconium vanadium) alloy is inserted from an open portion at one end of the getter valve 10, and the getter valve 10 is chipped off.
[0006]
Here, the getter valve 10 is attached to the back substrate 2 and has a large diameter portion 10 a that forms the getter chamber 9, and a small diameter portion that communicates with the large diameter portion 10 a to accommodate the getter material 11 in the getter chamber 9. 10b. Further, the shape of the getter material 11 is a cylindrical shape having a slightly smaller diameter than the inner diameter of the small diameter portion 10 b of the getter valve 10 so that it can be inserted from the small diameter portion 10 b of the getter valve 10, and from the inner diameter of the getter chamber 9. A small shape is also used.
[0007]
Usually, the getter material 11 is processed into a cylindrical shape and used. In order to enhance the effect of the getter, for example, five getter materials having an outer diameter of 4 mm and a length of about 5 mm are stored in the getter chamber per getter valve. For example, four getter valves 10 are attached to one panel, and 20 cylindrical getter materials are used for one panel.
[0008]
Next, in the exhaust / gas introduction process, the panel is evacuated for a predetermined time while being heated to about 350 ° C., for example, to remove impure gas contained in the inner surface of the front substrate 1 and the rear substrate 2 of the panel. . Next, after cooling the panel to near room temperature, a discharge gas containing Xe is filled in the discharge space 3 with a predetermined pressure, and the exhaust pipe 6 is chipped off as shown in FIG. The getter material 11 plays a role of shortening the exhaust time when the panel is evacuated and discharging the discharge space 3 from the inner surface of the front substrate 1 and the rear substrate 2 when the panel is stored and during display operation. This is to prevent the deterioration of the discharge characteristics of the panel by absorbing the impure gas generated and always maintaining the purity in the discharge space.
[0009]
[Problems to be solved by the invention]
However, in the conventional panel assembly process, the getter material 11 is inserted from the open portion of the getter valve 10 and lies in the getter chamber 9 provided on the bottom surface of the getter valve 10 and is stored in plural. 11 is a cylindrical shape having a diameter smaller than the inner diameter of the getter valve 10, and both end faces are processed at right angles to the longitudinal direction, so that the getter material 11 inserted from the getter valve 10 is 4A, it stands vertically to the surface substrate 1 as shown in FIG. 4 (a), the getter material 11 is clogged in the getter valve 10, and the necessary number of getter materials 11 cannot be supplied. There was a problem.
[0010]
Further, the getter material 11 that has stood vertically fits into the getter exhaust hole 8 formed in the back substrate 2 as shown in FIG. 4B, and closes the getter exhaust hole 8, thereby obtaining sufficient getter performance. There was a problem that could not be demonstrated. Moreover, when the getter material 11 is fitted into the getter exhaust hole 8 in this way, not only the getter effect is obtained, but in the worst case, when the panel is heated in the next heating / evacuation step, the getter material 11 There was a risk that the panel expanded due to thermal expansion, cracked from the getter exhaust hole 8, and the panel cracked.
[0011]
The present invention solves such a problem, and an object thereof is to ensure that a getter material can be accommodated in a getter chamber.
[0012]
[Means for Solving the Problems]
In order to solve such a problem, the present invention provides a front substrate, a rear substrate disposed so as to form a discharge space between the front substrate, the rear substrate, and the discharge space. A getter valve that forms a getter chamber; and a getter material accommodated in the getter chamber, wherein the getter material has a cylindrical shape having a diameter smaller than the inner diameter of the getter valve, and the length of the cylinder is The shape is larger than the diameter and at least the end surface on the side inserted into the getter valve is not machined at right angles to the longitudinal direction .
[0013]
As a result, when the getter material inserted from the getter valve falls into the getter chamber, the getter material does not stand vertically with respect to the back substrate, and can lie down reliably, so that the getter valve is not clogged. The required number can be stored in the getter room. In addition, since the getter material does not fit into the getter exhaust hole opened in the back substrate, the getter material thermally expands in the heating and vacuum exhaust process, causing a problem that the getter exhaust hole cracks and the panel breaks. do not do.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
That is, according to the first aspect of the present invention, a front substrate, a rear substrate disposed so as to form a discharge space between the front substrate, a rear substrate disposed on the rear substrate and in the discharge space. A getter valve that forms a getter chamber, and a getter material accommodated in the getter chamber, wherein the getter material has a cylindrical shape having a diameter smaller than the inner diameter of the getter valve, and the length of the cylinder is It has a shape that is larger than the diameter and at least the end face on the side inserted into the getter valve is not machined at right angles to the longitudinal direction .
[0015]
Further, the invention according to claim 2, gate Ttabarubu includes a large diameter portion which forms an attached and the getter chamber on the rear substrate, small diameter for accommodating the getter material communicating with the large-diameter portion to the getter chamber It consists of parts.
[0016]
Hereinafter, a panel according to an embodiment of the present invention will be described with reference to FIG.
[0017]
FIG. 1 shows a getter valve portion of a panel according to an embodiment of the present invention. In FIG. 1, the same portions as those shown in FIGS.
[0018]
That is, in the present invention, as shown in FIG. 1, a getter material 12 having a diameter smaller than the inner diameter of the getter valve 10 is used, and this getter material 12 is formed at the tip so that both tips are thin . The end surface and the side surface have an acute angle . In FIG. 1, both ends of the getter material 12 have acute angles, but it may have a shape in which only at least one tip on the side inserted into the getter valve 10 has an acute angle.
[0019]
The panel according to the present invention is heated to a firing temperature of about 500 ° C. in the air in the sealing step of sealing the front substrate 1 and the rear substrate 2 with the frit 4 as described with reference to FIGS. Thus, the front substrate 1 and the rear substrate 2, the rear substrate 2 and the exhaust pipe 6, and the rear substrate 2 and the getter valve 10 are airtightly joined by the frits 4 and 7, respectively.
[0020]
When this sealing step is completed, immediately before the next exhaust / gas introduction step, for example, five getter materials 12 are inserted from the open portion of the small diameter portion 10b of the getter valve 10 as shown in FIG. The inserted getter material 12 passes through the narrow tube and falls into the getter chamber 9, reaches the back substrate 2, and lies sideways. In the prior art, would stand rarely vertically getter chamber 9, but the getter material 12 in the small diameter portion 10b of the getter valve 10 that clogging was rarely, in the present invention, the tip of the getter material 12 Due to the acute angle, it lies on its side and does not clog as in the past.
[0021]
Subsequently, in the panel of FIG. 1, the getter valve 10 is chipped off as shown in FIG. Thereafter, in the exhaust / gas introduction step, first, the discharge space 3 is evacuated from the exhaust pipe 5 during heating at about 350 ° C., and then cooled to room temperature to fill the discharge space 3 with the discharge gas 3. Then, the exhaust pipe 6 is chipped off, and a discharge gas containing Xe is sealed in the discharge space 3. The reason why the panel is heated to about 350 ° C. during the evacuation process is to promote degassing from the inner surface of the front substrate 1 and the rear substrate 2 of the panel, and the role of the getter material 12 is during panel storage. During the display operation, the impure gas released from the inner surface of the front substrate 1 and the rear substrate 2 to the discharge space 3 is absorbed and the purity of the discharge gas in the discharge space 3 is always maintained, so that the discharge characteristics of the panel can be maintained. This is to prevent deterioration.
[0022]
【The invention's effect】
As described above, according to the present invention, by using the getter material shaped so that the tip is narrowed, the getter material can be reliably accommodated in the getter chamber without clogging the getter material in the getter valve. Trouble in the getter insertion process is eliminated, and the manufacturing yield can be improved. In addition, the getter material gets stuck in the getter exhaust hole, the getter exhaust performance is not deteriorated, and the panel cracking due to the thermal expansion of the getter material is eliminated.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a main part of a gas discharge display panel according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing an overall schematic structure of the gas discharge display panel. Cross-sectional view showing a state in the middle [FIG. 4] (a), (b) are cross-sectional views showing the main part of the panel for explaining the problems in the prior art [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front substrate 2 Back substrate 3 Discharge space 8 Getter exhaust hole 9 Getter chamber 10 Getter valve 10a Large diameter part 10b Small diameter part 12 Getter material

Claims (2)

A front substrate, a rear substrate disposed so as to form a discharge space between the front substrate, a getter bulb disposed in the rear substrate and forming a getter chamber communicating with the discharge space, and the getter chamber A getter material to be accommodated, wherein the getter material has a cylindrical shape having a diameter smaller than the inner diameter of the getter valve, and the length of the cylinder is larger than the diameter, and is at least inserted into the getter valve. The gas discharge display panel is characterized in that the end face of the gas is not processed at a right angle to the longitudinal direction .   The getter valve is configured by a large-diameter portion that is attached to the back substrate and forms a getter chamber, and a small-diameter portion that communicates with the large-diameter portion and accommodates a getter material in the getter chamber. Gas discharge display panel.

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