JP3232789B2 - Gas discharge type display - Google Patents

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 using gas discharge.

[0002]

2. Description of the Related Art In recent years, a gas discharge type display device has been used as a flat display device in information terminal equipment such as a portable computer, and its application field has been expanded due to its clear display and wide viewing angle. Further, with the increase in the size of the television receiver, a gas discharge type display device capable of greatly reducing the depth in place of a cathode ray tube has been receiving attention.

A conventional gas discharge type display device will be described below. FIG. 2 is a partially cutaway perspective view of a conventional gas discharge type 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, 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 the conventional gas discharge type display device, a front plate 1 on which a cathode line 2 is formed and a back plate 3 on which an anode line 4 is formed are used as partitions 6 as spacers, and the cathode line 2 is The anode line 4 is orthogonally opposed, and a discharge cell 9 is formed at the intersection. Further, an overcoat 8 having an opening 8a is formed on the anode wire 4 directly above the anode wire 4, and a phosphor 7 is applied around the opening 8a. The front plate 1 and the rear plate 3 are separated from each other by a partition 6 at a predetermined interval, the periphery is sealed with frit glass, and gas is sealed inside.

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

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

[0007]

However, in the above-mentioned conventional configuration, the composition of the sealing gas changes when the discharge time is prolonged, and the discharge characteristics deteriorate because the rare gas capacity of the gas discharge type display panel is small. Had issues. This phenomenon is particularly remarkable in a gas discharge display panel that does not use mercury, and it has become clear from studies by the inventor that xenon gas in a sealed gas is absorbed and reduced by long-term operation.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a gas discharge type display device having a high luminance, a high stability, and a long life with little change in the composition of a sealed gas even when used for a long time. And

[0009]

In order to achieve this object, a gas discharge type display device according to the present invention comprises connecting an auxiliary tank for storing a rare gas to a gas discharge type display panel;
Attach the heating means to the tank, for a certain time after turning off the power of the gas discharge display device, by the heating means
A structure is provided in which the auxiliary tank is heated so that the temperature of the auxiliary tank decreases more slowly than the temperature of the gas discharge display panel.

[0010]

According to this configuration, the capacity of the rare gas of the gas discharge type display panel can be substantially increased, and the use time can be prolonged accordingly.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a back plate side of a gas discharge type display device according to an embodiment of the present invention. In FIG.
The same portions as those of the conventional gas discharge type display device shown in FIG. Reference numeral 13 denotes 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, an example is shown in which one auxiliary tank 13 is attached to the center of the back plate 3, but a plurality of auxiliary tanks may be attached to the back plate 3. A region where a pattern is not formed on the inner surface of the substrate may be expanded outward to secure a space and serve as an auxiliary tank. In addition, even in a 26-inch gas discharge type display device, the amount of the rare gas sealed is about 40 cc.

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 power of the gas discharge type display device is turned off to stop the display, Further effects 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 increases 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 type display panel, and the rare gas in the auxiliary tank 13 flows forcibly into the gas discharge type display panel. Will be. Thus, the rare gas in the gas discharge type display panel is mixed with the rare gas in the auxiliary tank 13.

The heating means of the auxiliary tank 13 may be heated for a certain time after the power supply of the gas discharge type display device 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 turned off. However, if a capacitor using an electric double layer is used, the heating can be sufficiently performed.

When the power supply of the gas discharge type display device is turned off, the temperature of the auxiliary tank 13 is gradually decreased by lowering the temperature of the gas discharge type display panel. There is a method of covering the periphery with a heat insulating material, which is effective for mixing a rare gas.

[0017]

As described above, the present invention has a structure in which an auxiliary tank for storing a rare gas is connected to a gas discharge type display panel, whereby the amount of a built-in rare gas is increased. Therefore, even when used for a long period of time, a gas discharge type display device with a small change in the composition of the sealed gas, high luminance, high stability, and a long life can be realized.

[Brief description of the 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 type display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front panel (1st board) 3 Back panel (2nd board) 13 Auxiliary tank

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-61343 (JP, A) JP-A-49-90470 (JP, A) JP-A-50-17327 (JP, A) JP-A 48-48 57574 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01J 17/22 H01J 17/16 G09G 3/28

Claims (3)

(57) [Claims] 1. A first substrate provided with a first group of electrode lines and a second substrate provided with a second group of electrode lines are opposed to each other, and a rare gas is sealed therein. cutting the gas discharge display panel, an auxiliary tank for storing the inert gas therein and connected to the gas discharge display panel, fitted with heating means to said auxiliary tank, the power of the air body discharge display device For a certain period of time after the heating means
In the state where the auxiliary tank is heated, a gas discharge display device temperature drop of the auxiliary tank from the temperature drop is configured to be gentle in the gas discharge display panel. 2. The gas discharge type display device according to claim 1, wherein the heating means is turned off after a predetermined time has elapsed after turning off the power supply of the gas discharge type display device. 3. A gas discharge in which a first substrate provided with a first group of electrode lines and a second substrate provided with a second group of electrode lines are opposed to each other and a rare gas is sealed therein. Type display panel,
An auxiliary tank connected to the gas discharge type display panel and storing the rare gas therein; the auxiliary tank is covered with a heat insulating material, and after the power supply of the gas discharge type display device is cut off, A gas discharge type display device configured so that the temperature drop of the auxiliary tank becomes gentler than the temperature drop.