KR100830988B1 - Frit bar for flat panel display and fabricating thereof, and field emission display with the bar - Google Patents

Abstract

A sealable frit bar that integrally includes a getter support and seals the upper and lower plates, the method of manufacturing the bar, and the bar, thereby minimizing the invalid area and simplifying the getter installation process. The frit bar of the present invention comprises a frit coating portion to which the top plate and the lower plate sealing frit are coated on the flat panel display element, and a groove-like getter mounting portion on which the getter is seated, and the getter mounting portion is provided on both substrates. It is provided in the edge of the said board | substrate in the state which it located in the effective area formed by the side.

Flat Plate, Electric Field, Emission, Getter, Frit Bar, Support

Description

FRIT BAR FOR FLAT PANEL DISPLAY AND FABRICATING THEREOF, AND FIELD EMISSION DISPLAY WITH THE BAR}

1 is a plan view of a flat panel display device according to the present invention.

FIG. 2 is a sectional view taken along the line "I-I" of FIG.

3 is a perspective view of a frit bar according to a first embodiment of the present invention;

4 is a perspective view of a frit bar according to a second embodiment of the present invention;

5 is a perspective view of a frit bar according to a third embodiment of the present invention;

6 is a perspective view of a frit bar according to a fourth embodiment of the present invention;

7 is a perspective view of a frit bar according to a fifth embodiment of the present invention;

8A to 8E are process drawings showing a method for producing a frit bar according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display device, and more particularly, by including a sealing frit bar that integrally includes a getter support and seals an upper plate and a lower plate, a method of manufacturing the bar, and the bar. A field emission display device is described in which the dead area is minimized and the getter installation process is simplified.

In general, a flat panel display device (FPD) refers to a substantially flat display device that is thin and driven at a low voltage, unlike a cathode ray tube that requires a large volume and a high voltage. Field emission display devices (FEDs), vacuum fluorescence display devices (VFDs), plasma display devices (PDPs), and the like.

Although the detailed structure of the flat panel display device is different depending on the type, the electrode is usually formed inside two substrates, and electrons emitted by driving the electrode excite the phosphor to display a predetermined pattern.

Therefore, it is desirable to keep the space inside the substrate in a vacuum to allow the electrons to move well. For this purpose, both substrate edges of the device are sealed by frits or frits and side bars. The inside of the substrate or the exhaust pipe is provided with a getter for removing the gas generated when firing the electrode and the phosphor on the substrate to improve the degree of vacuum.

The getters used in flat panel display devices can be broadly classified into evaporative getters and non-evaporable getters. Although evaporative getters are frequently used in fluorescent tubes due to their low cost, particles are generated during the activation process, space is required for getters to evaporate and deposited, and they are currently non-evaporated due to relatively high activation temperatures. Attention is getting to older brother getters. In the case of the non-evaporable getter, there are various forms such as a band type and an annular shape, but a band type getter having advantages of ease of use and low activation temperature is widely used in various fields.

As a method of mounting the getter, there are a method of making a separate space outside the panel and mounting the inside of the panel.

As an example of the prior art for making and mounting a separate space outside the panel, Korean Patent Publication No. 96-42852 discloses an upper substrate provided with an anode electrode and a phosphor on one side and a cathode electrode formed to cross the anode electrode on one side. And an emitter-formed lower substrate facing each other so that a first space is formed by a spacer, wherein the transparent upper cover is provided to form a second space on the upper portion of the lower substrate, and the lower substrate is disposed on the lower substrate. The lower cover is installed to form three spaces, and a plurality of connection holes are formed in the upper substrate and the lower substrate to spatially connect the first to third spaces, and a getter is installed between the lower substrate and the lower cover. Field emission display with an exhaust port formed on one side and an exhaust pipe sealed after exhaust of residual gas through the exhaust port Self disclosed.

However, the display device having such a configuration has a problem in that an auxiliary chamber is formed outside the device using the upper cover and the lower cover, and the thickness of the device as a whole increases by using an exhaust pipe.

Further, as another example of the prior art, Japanese Patent Application Laid-Open No. 9-129161 is provided with a getter chamber at a lower side of the lower substrate, and a connection hole is formed in the lower substrate to spatially connect the inner space of the upper and lower substrates with the getter chamber. A field emission display device is disclosed in which an exhaust port is formed on a lower surface of a glass forming a getter chamber, an exhaust pipe is connected to the exhaust port, and a getter is installed inside the getter chamber using a getter support.

Here, the getter support is a band-shaped base that is longer than the circumferential length of the getter, the holding portion which is bent vertically with respect to the surface of the base and wraps the upper and lower surfaces of the getter, and is integrally formed with the base to obtain the getter inside the getter chamber. It consists of a belt shape including a support angle for installing at a predetermined height.

Therefore, the display element of such a configuration can be made somewhat thinner than the prior art using the upper and lower lids, but the thickness of the element is limited due to the structure in which the getter chamber and the exhaust pipe are installed under the lower substrate. to be.

In addition, when the getter is installed in the getter support, the holding part must be bent, and when the getter is installed inside the getter chamber, the support angle of one side must be fixed to the getter chamber first to prevent the getter support from being out of position. Fixing work is not easy.

Further, as another example of the prior art, Korean Patent Publication No. 99-43844 forms a panel of a field emission display device by aligning and sealing an upper substrate and a lower substrate, wherein the getter mounting chamber and the exhaust tubing are formed. Placing at one side of the panel so as to be manufactured at the same time when forming the panel, and welding and fixing the getter to the dermit wire and inserting the getter into the chamber for mounting the getter; A method of fixing and activating a getter of a field emission display device is disclosed, comprising the step of heating and activating a getter after performing a hot exhaust and tip-off process.

However, according to the above-described configuration, the device thickness can be further thinned as compared with the above two cases. However, the exhaust tubing is divided into two parts and fixed to both sides of the substrate. It is not easy to fix the getter such as inserting it into the getter mounting chamber, and when the exhaust tubule is melted by using a torch, a thermal shock is applied to the substrate, thereby degrading the display quality. have.

In addition, the method of mounting the getter inside the panel generally uses a separate structure for fixing the getter, such as a metal wire or a getter holder, which increases the number of processes due to the use of the structure (metal wire or getter holder). Due to the structure, the internal space is increased, so that a space other than the effective area is unnecessarily increased.

Thus, the present invention is provided with a sealing frit bar for sealing the upper plate and the lower plate integrally with the getter support, and a method of manufacturing the bar and the bar, thereby minimizing an invalid area and simplifying the getter installation process. It is an object to solve the above problems by providing an emission display element.

The object of the present invention described above,                     

A frit coating portion to which the top plate and the bottom plate sealing frit of the flat panel display element is coated, and a getter seat portion of the groove on which the getter is seated, and the getter seat portion is positioned toward an effective area formed by the two substrates. The frit bar for flat panel display elements provided in the edge of a board | substrate is achieved.

As an example of the method of manufacturing the frit bar, the present invention includes the steps of preparing a glass plate; Forming a frit coating unit to which top and bottom sealing frits of a flat panel display element are coated, and a getter mounting part of a groove on which a getter is seated on the glass plate; And applying a frit to the frit coating unit and firing the frit.

In another embodiment of the method of manufacturing the frit bar, the present invention includes the steps of preparing a glass plate; Forming a plurality of frit coating portions to which top and bottom sealing frits of the flat panel display element are applied, and a plurality of getter mounting portions of the grooves on which the getters are seated at predetermined intervals; Applying frit to the frit coating part and then firing the frit; And cutting the glass plate so that the frit coating unit and the getter seating unit are provided one by one. According to this method, it is possible to form a large number of frit bars having a getter support at the same time. When forming the frit bar by the above methods, it is preferable that the glass plate is formed to have a thickness equal to or similar to the distance between the upper plate and the lower plate.

The frit bar formed by the above-described manufacturing method can be used for flat panel display devices such as fluorescent display tubes, field emission display devices, and plasma display devices. For example, the field emission display device having the above-described frit bar is a fixed type. An upper plate and a lower plate disposed to face each other at intervals; An cathode provided on the lower plate and an emitter provided on a surface of the electrode to emit electrons when an electric field is formed; An anode electrode provided on the upper plate and a fluorescent layer provided on the electrode and excited by the electrons emitted from the emitter and emitting light; A frit bar having a frit coating part and a getter seating part, the frit bar being installed at the inner edges of both substrates such that the getter seating part is located toward an effective area and sealing both substrates by frit applied to the frit coating part; And a getter seated on the getter mounting part to maintain an internal space between the two substrates at a high vacuum.

In practicing the present invention, the frit bar includes a communication portion for communicating the effective area inside both substrates and the getter seating portion, a bump preventing the getter from being detached from the getter seating portion, and a wire on which the getter heating metal wire is installed. An installation groove may be further provided, and the frit coating unit may be formed as a line groove, and the getter seating unit may be formed as a line, circular or square groove.

The getter seating part and the frit coating part may be formed by etching or mechanical polishing one or both surfaces of the glass plate.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show a flat panel display device having a frit bar of the present invention, in particular, a plan view and a cross-sectional view showing a field emission display device, and FIG. 3 is a perspective view showing the frit bar of FIGS. 1 and 2.                     

The flat panel display device, particularly the field emission display device 10 of the present invention, has a top plate 12 and a bottom plate 14 provided with a display pattern portion constituting the effective area A, an electron emission portion, and internal electrodes for driving them. It is provided. The lower plate 14 is provided with a cathode electrode 16 in a line shape, and the upper plate 12 is provided with an anode electrode 18 in a line shape so as to vertically intersect with the cathode electrode 16.

A surface type emitter 20 made of an electron emitting material is positioned on the surface of the cathode electrode 16, and a fluorescent film 22 is formed on one surface of the anode electrode 18 facing the emitter 20. ) Is located. Here, the emitter 20 may be made of a spine type of spire.

And the frit bar 24 of this invention is provided in the inner surface edge part of the upper board 12 and the lower board 14. As shown in FIG. The frit bar 24 is made of a glass plate 26 having a thickness t, preferably equal to or similar to the spacing H between the upper plate 12 and the lower plate 14. By sealing the upper plate 12 and the lower plate 14, the coating unit 30 to which the sealing frit 28 to seal the inside of the device is applied, and the residual gas is adsorbed after the exhaust process to absorb the vacuum degree inside the device. It is provided with the groove-like getter seating part 34 in which the getter 32 for improving is seated.

In this case, the frit coating unit 30 may be formed using the upper and lower surfaces of the glass plate 26, or may be formed in a groove shape as shown by a dotted line in FIG. 3. In addition, the getter seating portion 34 includes a stopper 36 for preventing the getter 32 seated on the portion from being detached from the seating portion 34, and an effective area on both sides of the substrates 12 and 14, respectively. A communication groove 38 for communicating A and the getter seat 34 is further provided.

3 illustrates that both ends of the frit bar 24 are vertically formed with respect to the longitudinal direction thereof for convenience, but this is not essential, and both ends of the frit bar 24 may be inclined as shown in FIG. 1. It's okay.

Meanwhile, as the getter 32 seated on the getter seating part 34, a conventional non-evaporable getter may be used. The non-evaporable getter refers to a getter which adsorbs the residual gas during a high temperature aging process for activating the residual gas after the exhaust process, and the adsorption action of the residual gas occurs at a temperature of about 250 ° C. or more at which the residual gas starts to diffuse. And, the adsorption action of the gas is made most efficiently at 350 ~ 450 ℃.

Such a non-evaporable getter may be made of, for example, an ST 101 alloy in which zirconium and aluminum are mixed in a predetermined weight ratio (for example, 84% by weight of zirconium and 16% by weight of aluminum), in which case, a strip-shaped getter coated with ST 101 alloy powder The getter installation process is completed by seating the inside of the groove of the getter seating part 34.

4 to 6 are perspective views of the frit bar according to the second to fourth embodiments of the present invention, respectively, and FIGS. 4 and 5 are shapes of the getter seating portion 34 in consideration of the characteristics of the flat panel display device. Is formed into a circular groove, a square groove, etc., and FIG. 6 extends the getter seat 34 on the groove to the end of the glass plate 26. Here, since the basic configuration of the frit bar shown in FIGS. 4 to 6 is similar to the frit bar of FIG. 3, a detailed description thereof will be omitted.

7 illustrates a perspective view of a frit bar according to a fifth embodiment of the present invention, and particularly, when the getter is activated by current heating.

As mentioned above, when the getter 32 is activated by current heating, a method of drawing the getter heating metal wire W out of the device is an important problem. Therefore, the present embodiment forms a wire installation groove 40 in the vertical direction of the frit coating unit 30 in order to solve the above problems, and getters the metal wires W through the wire installation grooves 40. 32), and the frit is applied to the wire mounting groove 40 and the frit coating unit 30 so as to be sealed by the frit in the sealing process of both substrates.

According to the frit bar of such a configuration, there is no fear of the occurrence of vacuum leak due to the metal wire W, and since the metal wire W is caught in the frit, it is possible to prevent the gap between the two substrates from changing due to the wire. have.

In addition, the flat panel display device having the frit bar of the present invention, in particular, the field emission display device, has a simple getter installation operation and can be installed in a minimum space inside the device, thereby minimizing a space other than the effective area. .

Hereinafter, the method of manufacturing the bar will be described taking the frit bar shown in FIG. 7 as an example. The frit bar manufacturing method of the present invention can be divided into the case of forming one bar with one glass plate and the case of forming multiple bars simultaneously with one glass plate.

First, the latter case will be described with reference to FIGS. 2 and 8A to 8E. In order to manufacture the frit bar of the present invention, a glass plate 26 having a constant thickness t is prepared as shown in FIG. 8A. . In this case, the thickness t of the glass plate 26 is preferably the same as or similar to the interval between the upper plate 12 and the lower plate 14 of the flat panel display element.

Subsequently, as shown in FIG. 8B, the plural pairs of the frit coating portions 30 and the getter mounting portions 34 are chemically etched or mechanically formed by pairing the grooved frit coating portions 30 and the getter seating portions 34. Form by polishing. In this case, the getter seating portion 34 may be formed only on one surface of the upper surface or the lower surface of the glass plate 26. When forming the frit coating portion 30 and the getter mounting portion 34, the stopper 36 is formed. ) And the communication groove 38 is formed at the same time.

Next, as shown in FIG. 8C, the frit 28 is applied and dried to the frit applying unit 30 of the glass plate 26 by printing or dispensing. In this case, as shown in FIG. 8D, the frit coating unit 30 is filled with the frit 28, and after firing the frit 28, one frit bar 24 is provided with one frit coating unit ( 30) and the glass plate 26 is cut as shown in FIG. 8E to have the getter seat 34. FIG.

As such, when the frit bar is manufactured by the method shown in FIGS. 8A to 8E, it is possible to form a large amount of frit bar at the same time, which has a desirable effect in terms of productivity.                     

The former method of forming a frit bar is similar to the latter method described above except that a glass plate having a predetermined width corresponding to one frit bar is used.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

As described above, according to the present invention, the frit bar used to seal the upper plate and the lower plate of the flat panel display element is integrally provided with a getter seating portion, so that the getter installation work can be easily performed and the space other than the effective area is minimized. In addition, the getter installation space can be easily secured, thereby effectively suppressing an increase in the thickness of the device due to use of the getter.

Claims (21)

A frit coating portion to which the top plate and the bottom plate sealing frit of the flat panel display element is coated, and a getter seat portion of the groove on which the getter is seated, and the getter seat portion is positioned toward an effective area formed by the two substrates. A frit bar for flat panel display elements installed on the inner edge of a substrate. The frit bar for flat panel display elements according to claim 1, further comprising a communication portion for communicating effective regions inside the substrates and a getter seating portion. The frit bar of claim 1, further comprising a stopper for preventing the getter from being separated from the getter seat. The frit bar for flat panel display elements according to claim 1, further comprising a wire mounting groove in which a getter heating metal wire is provided. The frit bar for flat panel display elements according to claim 1, wherein the frit coating portion comprises a groove on a line. The frit bar for flat panel display elements according to any one of claims 1 to 5, wherein the getter seating portion is formed of a line, a circular or a square groove. Preparing a plate; Forming a frit coating unit to which top and bottom sealing frits of the flat panel display device are coated, and a getter mounting part of a groove on which the getter is mounted; The manufacturing method of the frit bar for flat panel display elements containing these. Preparing a plate; Forming a plurality of frit coating portions on which the upper plate and the lower plate sealing frit of the flat panel display element are coated, and a plurality of groove-like getter mounting portions on which the getters are seated on the plate at predetermined intervals; Cutting the plate so that the frit coating unit and the getter mounting unit are provided one by one; The manufacturing method of the frit bar for flat panel display elements containing these. The method of manufacturing a frit bar for flat panel display device according to claim 7 or 8, wherein the plate is formed to have the same thickness as the gap between the upper plate and the lower plate. The manufacturing method of the frit bar for flat panel display elements of Claim 7 or 8 which further forms the wire installation groove | channel in which the getter heating metal wire is provided. The manufacturing method of the frit bar for flat panel display elements of Claim 7 or 8 which further forms the communication part for communicating the effective area inside both said board | substrates, and a getter mounting part. The method of manufacturing a frit bar for flat panel display device according to claim 7 or 8, further comprising a stopper for preventing the getter from being separated from the getter seat. The method of manufacturing a frit bar for flat panel display device according to claim 7 or 8, wherein the frit coating portion is formed into a groove on a line. The method for manufacturing a frit bar for flat panel display device according to claim 7 or 8, wherein the getter seating portion is formed in a line, circular or rectangular groove. The method of manufacturing a frit bar for flat panel display device according to claim 7 or 8, further comprising: forming the frit coating part and the getter seating part, and then applying and drying the frit to the frit coating part and firing the frit. . An upper plate and a lower plate disposed to face each other; An cathode provided on the lower plate and an emitter provided on a surface of the electrode to emit electrons when an electric field is formed; An anode electrode provided on the top plate and a fluorescent layer provided on the electrode and excited by the electrons emitted from the emitter and emitting light; A frit bar having a frit coating portion and a grooved getter mounting portion, the frit bar provided on the inner edges of both substrates such that the getter mounting portion is located toward an effective area and sealing both substrates by frits applied to the frit coating portion; A getter mounted on the getter seating portion to maintain an internal space between the two substrates at a high vacuum; Field emission display device comprising a. 17. The field emission display device according to claim 16, wherein the frit bar further comprises a communication portion for communicating the effective area inside the upper and lower plates with the getter seating portion. 17. The field emission display device of claim 16, wherein the frit bar further includes a barrier to prevent the getter from leaving the getter seat. The field emission display device according to claim 16, wherein the frit coating portion comprises a groove on a line. 17. The field emission display device of claim 16, wherein the frit bar further comprises a wire mounting groove in which a getter heating metal wire is installed. 21. The field emission display device according to any one of claims 16 to 20, wherein the getter seating portion is formed in a line, circular or square groove.

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