KR20060024891A - Liquid crystal display getter - Google Patents

Abstract

The present invention relates to a getter capable of generating high vacuum by absorbing residual gas in a closed vessel subjected to a primary vacuum treatment with a vacuum pump in a chemical reaction, and particularly including mercury as a component of the getter. It is designed to be used exclusively for the Cold Cathode Fluorescent Lamp (CCFL). In addition, the getter of the present invention is intended to be used in a flat fluorescent lamp (FFL), a high vacuum lamp containing a small amount of mercury, and an inert gas atmosphere lamp containing a small amount of mercury.

Getter, LCD, TFT, Cold Cathode Fluorescent Lamp, Square Light Lamp

Description

Liquid Crystal Display Getter}

1 is a perspective view of a getter powder pressurized filled in a pipe-shaped container according to the present invention

Figure 2 is a perspective view of the getter powder pressurized filled in the cup-shaped container according to the present invention

Figure 3 is a perspective view of the getter powder is pressurized filled in the pipe-shaped container with a predetermined width of the side according to the present invention

Figure 4 is a perspective view of the getter powder pressurized filled in the cup-shaped container with a predetermined width of the side according to the present invention

Figure 5 is a perspective view of a press-molded with a pallet (Pellet) type only getter powder according to the present invention

Figure 6 is a block diagram showing the manufacturing process of the lamp using the getter according to the present invention

7 is a view showing a lamp using a getter according to the present invention;

** Explanation of symbols for main parts of drawings **

10: Getter 20: Mixture

30 container

100: getter inserted inside the lamp 110: lamp

120: lamp upper portion 130: recessed portion in which the electrode is inserted

140: lamp 150: electrode

The present invention relates to a getter which is capable of producing high vacuum by absorbing residual gas in a closed vessel subjected to a primary vacuum treatment with a vacuum pump by chemical reaction, and in particular, contains mercury as a constituent of the getter. It can be used exclusively for the Cold Cathode Fluorescent Lamp (CCFL). In addition, the LCD according to the present invention can be used in the flat light emitting (FFL: flat fluorescent lamp) of the TFT-LCD, a high vacuum lamp containing mercury, and an inert gas atmosphere lamp containing mercury. .

Typically, the getter is removed after evacuating the vacuum pump, and various metal components can be prepared in the form of alloys, intermetallic compounds, and mixtures depending on the components of residual gas remaining in the lamp and the conditions under which the getter is used during lamp manufacturing. It was to have the property of absorbing the gases to be chemically well.

Therefore, many kinds of getters can be manufactured according to the kind and composition state (alloy, intermetallic compound, mixture) of the components, and the effect varies greatly depending on the components, composition ratio and quality of the components. Can be. Therefore, the research continues to be made by varying the components of the getter and its composition ratio to obtain a good getter, and the development is still continued.

One of the products using getters was a TFT-LCD cold cathode fluorescent lamp (CCFL). The lamp was applicable to PCs, notebook PCs, LCD TVs, mobile phones, video phones, and car navigators. However, the conventional getter did not have a getter manufactured to use a single getter for each lamp each time one lamp was manufactured. In other words, the conventional getter uses the product filled with the getter powder inside the groove of the long wire shape slotted in the square model, and the getter manufactured by attaching the getter powder thinly on the thin metal sheet surface to manufacture the lamp. Each time the getter was cut to a constant size. Therefore, when cutting the getter, the getter powder containing mercury could be desorbed, which not only deteriorated the working environment, but also caused the amount of getter to be unbalanced depending on the degree of desorption. Due to the deviation of the quality could be produced inconsistently.

In addition, the existing products are shaped like squares and have long grooves in which the getter powder is pressed into the groove, or the getter powder is thinly attached to the thin square metal sheet surface. In the process of injecting the getter into the problem that the getter is caught is not smoothly introduced.

The getter of the present invention is made of metal and mercury in the form of a compound, and the getter powder is press-fitted into a single cylindrical or cup-shaped circular container, so that the getter can be easily introduced into the lamp. In addition, it acts as a getter, as well as injecting the correct amount of mercury inside the lamp.

On the other hand, the getter of the present invention increases the vacuum degree and at the same time without changing the process, by operating a high frequency as in the existing process, the material and shape of the getter's components and containers so that the desired amount of mercury can be accurately and automatically introduced into the lamp It was developed according to.

In particular, the composition of the getter and the material, shape of the container is well harmonized by the high frequency, the getter receives heat evenly, mercury is released only in the temperature range (450 ~ 900 ℃) the getter is written. In addition, the quantity of mercury released is kept constant, which significantly reduces the defect rate, and at the same time, the mercury emission and vacuum level are increased by one high frequency by matching the emission temperature range of the mercury and the activation temperature range where the getter dominates the gas. Would have done so.

The getter of the present invention is prepared by mixing iron (Fe) and titanium (Ti) powder in a weight ratio of (10 to 60): (90 to 40) by melting or reacting at 800 ° C. or more. Alloy (Alloy) or Inter-metallic Compound is made, and one of the iron-titanium (Fe-Ti) alloy (Alloy) or Inter-metallic Compound is selected and titanium (Ti) Powder and weight ratio (0 ~ 96): (100 ~ 4) by mixing to make a mixed powder mixed with titanium (Ti) to iron-titanium (Fe-Ti). The mixed powder was mixed again with a weight ratio of mercury (30 to 90): (70 to 10) and reacted at a temperature of 350 to 1900 ° C. (350 ° C. or more) to which iron, titanium, and mercury were mixed (Fe-Ti + Ti). It produces a getter composed of amalgam compounds in the form of) -Hg.

The getter according to the present invention composed of the (Fe-Ti + Ti) -Hg type amalgam compound is a pipe-shaped cylindrical container having a diameter of 0.7 to 7 mm and a height of 0.5 to 20 mm as shown in FIG. It is made of a closed cup-shaped cylindrical container. The same standard and shape as the diameter, length, or the same standard as shown in Figures 3 and 4, but the width of 0.01 ~ 3.0mm on one side of the container by removing the portion of the container by the length of the container of one side of the open shape The container may be manufactured by pressurized filling, or may be manufactured by press-molding into a pallet type of powder itself in a cylindrical shape with a diameter of 0.7 to 7 mm and a height of 0.5 to 20 mm as shown in FIG. 5. As the container material, one of nickel, stainless steel, nickel plated in stainless steel, iron, nickel plated in iron, copper, nickel plated in copper, molybdenum and titanium may be selected and used.

Meanwhile, in addition to the generated getter as the getter component of the present invention, the getter and the zirconium (Zr) powder are mixed in a weight ratio of (30 to 96): (70 to 4);

A getter mixed with the getter and titanium (Ti) powder in a weight ratio of (30 to 96): (70 to 4);

A getter mixed with zirconium-iron (ZrFe) powder, which is an alloy or an intermetallic compound containing 60% or more by weight of the getter and zirconium (Zr) in a weight ratio of (30 to 96): (70 to 4);

A getter obtained by mixing titanium-iron (TiFe) powder, which is an alloy or an intermetallic compound containing 60% or more by weight of the getter and titanium (Ti), in a weight ratio of (30 to 96): (70 to 4);

The getter and zirconium (Zr): manganese (Mn) is an alloy or an intermetallic compound of zirconium-manganese (ZrMn) powder consisting of a weight ratio of (40 to 80): (60 to 20) by weight ratio (30 to 96): Getter mixed with (70-4);

Zirconium-titanium-iron, which is an alloy or an intermetallic compound, wherein the getter and zirconium (Zr): titanium (Ti): iron (Fe) have a weight ratio of (40 to 80) :( 10 to 30) :( 10 to 30) Getter in which (ZrTiFe) powder is mixed in a weight ratio of (30 to 96): (70 to 4); Can be prepared.

6 shows an embodiment in which a getter of the present invention is used in a manufacturing process of a lamp based on a TFT-LCD cold cathode fluorescent lamp (CCFL).

First, by sucking the air in the lamp while heated to about 400 ℃ with a vacuum pump to form a primary vacuum (S100).

Sealing the upper end portion 120 of the lamp (S200).

When the getter 100 inserted into the lamp is heated at a high frequency at 450 to 900 ° C., the getter is activated to absorb the remaining air remaining inside the lamp by a chemical reaction to form a high vacuum. On the other hand, when the getter is heated, mercury is released from the getter while the mercury in the amalgam state inside the getter is vaporized, and the released mercury is moved to the lower side of the lamp temperature automatically (S300).

When the mercury is moved into the lamp 140, the lamp is completed by cutting the concave portion 130 in which the electrode is inserted at the same time as the sealing (S400).

In the above, the container type getter is made of nickel, stainless steel, nickel plated steel, nickel plated iron, iron plated iron, nickel plated iron, nickel plated copper, molybdenum or titanium. It is possible to select and use, and the typical size and shape of the container is a cup-shaped cylindrical container with a diameter of 0.7 to 7 mm and a height of 0.5 to 20 mm, which can be used as an electrode attached to both sides of the lamp. will be.

As described above, preferred embodiments of the present invention have been described, but the present invention is not limited to the above-described embodiments, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone with ordinary knowledge will have the technical spirit of the present invention to the extent that various modifications can be made.

The getter according to the present invention can be used for all lamps used for light emitting purposes of mercury, and in particular, it can be used more exclusively in TFT-LCD cold cathode fluorescent lamps (CCFL). The TFT-LCD Cold Cathode Fluorescent Lamp (CCFL) is widely used in PCs, notebook PCs, LCD TVs, headphones, video telephones, and car navigators. As mercury is injected.

Since the getter according to the present invention is manufactured to always inject a precise amount of mercury from the amalgam state in the gaseous state at a constant gaseous state, it is possible to increase the effect as compared to the conventional method of injecting mercury separately. In addition, the getter powder can be easily injected into the lamp glass tube by press-fitting the getter powder into a single cylindrical or cup-shaped round container.

In addition, since the lamps manufactured using the minimum amount of mercury are absolutely preferred due to environmental problems around the world, the getter of the present invention which vaporizes and injects mercury into a gaseous state is very suitable for manufacturing lamps requiring mercury. Ideally.

In particular, the getter of the present invention harmonizes the composition of the getter with the material and shape of the container, and does not change the existing process to which the getter is applied, but the exact amount only in the temperature range (450-900 ° C.) at which the getter is written by one high frequency heating. By discharging mercury, the mercury emission temperature range and the getter are activated to coincide with the temperature range that predominantly absorbs the gas, thereby enabling the simultaneous high frequency mercury emission and vacuum.

Claims (4)

A getter capable of producing high vacuum by absorbing residual gas in a closed vessel subjected to primary vacuum treatment by a vacuum pump by chemical reaction, Iron (Ti) and titanium (Ti) powders are mixed at a weight ratio of (10 to 60): (90 to 40) and melted or reacted at 800 ° C or higher to produce an iron-titanium (Fe-Ti) alloy (Alloy) or Inter-metallic compounds; The iron-titanium (Fe-Ti) alloy (Alloy) or inter-metallic compound (Inter-metallic Compound) by selecting one of the titanium (Ti) powder and weight ratio (0 ~ 96): (100 ~ 4) by mixing iron- Mixed powder obtained by mixing titanium (Ti) with titanium (Fe-Ti); The mixed powder is mixed with mercury in a weight ratio of (30 to 90): (70 to 10) and reacted at a temperature of 350 to 1900 ° C (350 ° C or more) to which iron, titanium, and mercury are mixed (Fe-Ti + Ti) Amalgam compounds in Hg form; LCD getter. The method of claim 1, A getter mixed with the LC getter and zirconium (Zr) powder in a weight ratio of 30 to 96:70 to 4; A getter mixed with the LC getter and titanium (Ti) powder in a weight ratio (30 to 96): (70 to 4); A getter mixed with a ZrConium-Iron (ZrFe) powder, which is an alloy or an intermetallic compound containing the LC getter and zirconium (Zr) in a weight ratio of 60% or more; A getter mixed with the titanium getter and the titanium-iron (TiFe) powder, which is an alloy or an intermetallic compound containing a weight ratio of 60% or more, in a weight ratio (30 to 96): (70 to 4); The zirconium-manganese (ZrMn) powder, which is an alloy or an intermetallic compound, wherein the LC getter and the zirconium (Zr): manganese (Mn) are (40 to 80) :( 60 to 20), the weight ratio is 30 to 96: Getter mixed with (70-4); Zirconium-titanium- which is an alloy or an intermetallic compound in which the weight of the LC getter and zirconium (Zr): titanium (Ti): iron (Fe) is (40 to 80): (10 to 30): (10 to 30) Getters in which iron (ZrTiFe) powder is mixed in a weight ratio of 30 to 96:70 to 4; LCD getter, characterized in that it can be produced. The method according to claim 1 or 2, The getter is a pipe-shaped cylindrical container having a diameter of 0.7 to 7 mm, a height of 0.5 to 20 mm; A cup-shaped cylindrical container with a closed bottom; It is composed by selecting one of the cylindrical containers pressure-molded in the pallet type of the powder itself, LCD getter, characterized in that by removing the portion of the width 0.01 ~ 3.0mm on one side of the container by the length of the container can be manufactured by press-filling the container of the shape of one side open. The method of claim 3, The container is nickel, stainless steel, nickel plated in stainless steel, iron, nickel plated in iron, copper, nickel plated in copper, molybdenum, titanium material, characterized in that can be used to select one of the materials.

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