JPH0745201A - Gas discharge type display device - Google Patents

Abstract

PURPOSE:To provide a high intensity, highly stable and long service life gas discharge type display device by which a composition of sealing gas is hardly changed even if it is used over a long period of time. CONSTITUTION:A front panel 1 and a backing panel 3 are held opposite by a partition wall, and are connected to a gas discharge type display panel inside which rare gas is sealed, and an auxiliary tank 13 is arranged inside to store the rare gas. Thereby, rare gas capacity is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge type display device for displaying characters and images by utilizing gas discharge.

[0002]

2. Description of the Related Art In recent years, a gas discharge display device has been used as a flat display device in information terminal equipment such as a portable computer, and its field of application is expanding due to its clear display and wide viewing angle. Further, with the increase in the size of television receivers, attention has been focused on a gas discharge display device that can be made much thinner in depth instead of a cathode ray tube.

A conventional gas discharge display device will be described below. FIG. 2 is a partially cutaway perspective view of a conventional gas discharge display device. In FIG. 2, 1 is a front plate, 2 is a cathode wire formed on the front plate 1, 3 is a back plate, 4 is an anode wire formed on the back plate 3, 5 is an auxiliary anode, 6 is a partition wall, and 7 is a phosphor. , 8 is an overcoat, 8a is an opening formed in the overcoat 8, 9 is a display cell, and 10 is an auxiliary cell.

As shown in FIG. 2, in a conventional gas discharge display device, a front plate 1 having cathode lines 2 and a rear plate 3 having anode lines 4 are used as partition walls 6 for spacers, and cathode lines 2 are used. The anode lines 4 are opposed to each other at right angles, and the discharge cells 9 are formed at the intersections. Further, an overcoat 8 having an opening 8a is formed on the anode wire 4 immediately above the anode wire 4, and a phosphor 7 is applied so as to surround the opening 8a. The front plate 1 and the back plate 3 are separated by a partition wall 6 at regular intervals, the peripheral portion is sealed with frit glass, and gas is sealed inside.

In the gas discharge type display device shown in FIG. 2, the gas enclosed inside emits ultraviolet rays by gas discharge,
The ultraviolet rays cause the phosphor 7 to emit light. In such a gas discharge type display device, color display can be performed by applying phosphors 7 that emit red, green and blue light, for example.

FIG. 3 is a perspective view of the back plate side of a conventional gas discharge type display device. As shown in FIG. 3, on the back surface of the back plate 3, a getter valve 11 for gettering residual gas inside and a chip-off tube for vacuuming the inside and introducing a rare gas and then sealing are attached. Has been.
Note that FIG. 3 shows a state in which all the vacuum evacuation, gettering and rare gas filling steps are completed.

[0007]

However, in the above-mentioned conventional structure, since the rare gas capacity of the gas discharge type display panel is small, the composition of the enclosed gas is changed and the discharge characteristics are deteriorated when the discharge time becomes long. Had challenges. This phenomenon is particularly remarkable in a gas discharge display panel that does not use mercury, and it has been clarified by the inventors' research that the xenon gas in the enclosed gas is absorbed and reduced by a long-term operation.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a gas discharge type display device which has a small change in the composition of the enclosed gas even if it is used for a long period of time, and has high brightness, high stability and long life. And

[0009]

To achieve this object, the gas discharge display device of the present invention has a structure in which an auxiliary tank for storing a rare gas is connected to a gas discharge display panel.

[0010]

With this structure, the rare gas capacity of the gas discharge type display panel can be substantially increased, and the operating time can be extended accordingly.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of the back plate side of a gas discharge type display device according to an embodiment of the present invention. In FIG.
The same parts as those of the conventional gas discharge display device shown in FIG. Reference numeral 13 is an independent auxiliary tank, which is connected to the back plate 3 of the gas discharge type panel by a communication pipe (not shown).

In this embodiment, one auxiliary tank 13 is attached to the central portion of the back plate 3, but a plurality of auxiliary tanks may be attached to the back plate 3, and further, the back plate 3 may be attached. The area where no pattern is formed may be expanded outward on the inner surface to secure a space and serve as an auxiliary tank. Even in the 26-inch gas discharge type display device, the enclosed rare gas is about 40 cc, so that the auxiliary tank 13 can exhibit its effect sufficiently if it has such a capacity.

Further, an electric heater is attached to a part of the auxiliary tank 13 as a heating means to heat the auxiliary tank during normal use, and when the gas discharge type display device is turned off to stop the display, A further effect can be obtained by stopping the power supply to the electric heater after a certain time has elapsed. That is, the temperature of the gas discharge type display panel rises during normal operation, but returns to room temperature when the power is turned off. At this time, since the auxiliary tank 13 is heated, the internal pressure of the auxiliary tank 13 becomes higher than the internal pressure of the gas discharge display panel, and the rare gas in the auxiliary tank 13 is forced to flow into the gas discharge display panel. It will be. In this way, the rare gas in the gas discharge display panel is mixed with the rare gas in the auxiliary tank 13.

The heating means of the auxiliary tank 13 may heat the gas discharge type display device for a certain period of time after the power is turned off. In any case, it is necessary to energize the electric heater for a certain period of time after the main power supply is cut off, but it can be sufficiently heated by using a capacitive element using an electric double layer.

Further, when the power of the gas discharge type display device is cut off, as a method of slowing the temperature decrease of the auxiliary tank 13 more than the temperature decrease of the gas discharge type display panel, in addition to the heating by the electric heater, the auxiliary tank 13 is heated. There is a method of covering the surroundings with a heat insulating material, which is effective for mixing rare gases.

[0017]

As described above, the present invention has a structure in which an auxiliary tank for storing rare gas is connected to a gas discharge type display panel, which increases the amount of rare gas contained therein. Therefore, it is possible to realize a gas discharge display device in which the composition of the enclosed gas is small even when used for a long period of time, and which has high brightness, high stability, and long life.

[Brief description of drawings]

FIG. 1 is a perspective view of a back plate side of a gas discharge display device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of a conventional gas discharge display device.

FIG. 3 is a perspective view of a back plate side of a conventional gas discharge display device.

[Explanation of symbols]

 1 Front Panel (First Substrate) 3 Rear Panel (Second Substrate) 13 Auxiliary Tank

Claims (3)

[Claims] 1. A first substrate having a group of first electrode lines, a second substrate having a group of second electrode lines, an electrode body connected to the second electrode lines, and a phosphor. And a gas discharge type display panel in which a rare gas is enclosed by a partition wall, and a rare gas is enclosed in the interior, and an auxiliary tank that is connected to the gas discharge type display panel and stores the rare gas therein. Display device. 2. The gas discharge type display according to claim 1, wherein a heating means is attached to the auxiliary tank, and the heating means is stopped after a certain period of time has passed since the gas discharge type display device was turned off. apparatus. 3. A gas discharge display device in which the auxiliary tank is covered with a heat insulating material, and after the power supply of the gas discharge display device is turned off, the temperature of the auxiliary tank drops after the temperature drop of the gas discharge display panel. .