KR100560509B1 - Flat panel display and method of manufacturing the same - Google Patents

Abstract

A flat panel display in which a spacer is arranged to maintain a cell gap between a face plate and a back plate, and the flat panel display plate is designed so that the fixing state of the spacer can be enhanced by a simple process so that the size of the flat display can be pursued. A junction media layer is formed in a predetermined pattern on the non-display area, a plurality of spacers are disposed on the junction media layer, the plate is heated to a temperature below the softening point of the plate, and between the junction media layer and the spacer. The spacer is fixed on the plate by supplying a voltage so that a current flows through it.

Spacer, flat panel display, field emission, cell gap, face plate, bonding layer

Description

Flat panel display and manufacturing method of this flat panel display {FLAT PANEL DISPLAY AND METHOD OF MANUFACTURING THE SAME}

1 is a cross-sectional view showing a flat panel display according to an embodiment of the present invention,

2 and 3 are perspective views showing the face plate portion of the flat panel display according to an embodiment of the present invention,

4, 5, and 6 are views for explaining the fixing method of the spacer according to an embodiment of the present invention,

7 is a plan view illustrating the back plate portion of the flat panel display according to the embodiment of the present invention;

8 and 9 are views for explaining a method of fixing a spacer according to another embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to flat panel displays, and more particularly, to flat panel displays in which spacers are disposed to maintain the cell gap of the display in a sealed container.

Flat panel displays (FPDs) typically form a closed container with a combination of faceplate, backplate, and side wall, and the interior of the container is approximately 10 ^-7 torr. Is maintained in a vacuum state.

Such flat panel displays have a spacer which allows the cell gap of the display to be maintained inside the exterior, since it is difficult to maintain the above-mentioned spacing uniformly than other displays due to the pressure difference between the internal pressure and the external atmospheric pressure formed between the two plates. At least one will be arranged.

In the prior art of the spacer, US Patent No. 5,650,690 discloses a field emission device by mounting a spacer wall between a gripper provided on a face plate and a locator provided on a back plate. A technique for manufacturing a field emission device is disclosed.

In this technique, a spacer wall for effectively maintaining the internal space of the device is made of a material such as ceramic or glass, and fixedly disposed between the face plate and the back plate by the gripper and the locator described above.

However, in the above technique, the manufacturing process of the gripper and the locator for fixing the spacer wall is complicated and difficult, and after packaging the device according to the photolithography process for the photosensitive material, residual gas can be generated in the internal space. This gas may reduce the device's own life or reduce the picture quality implemented in the device.

In addition, another conventionally proposed technique includes a flat panel display described in US Pat. No. 5,589,731. In this technique, a side wall is fixed by forming a notch in the side wall to fix the spacer wall and inserting both ends of the spacer wall in the notch.

However, such a spacer fixing structure is easy when the device is made of small size, but when the device is made of large size (approximately 5 inches or more), the fixing force on both ends of the spacer wall inserted into the notch becomes unstable. In the final state of the device, the spacer wall may bend.

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a flat panel display in which a fixed state of a spacer fixed in a substrate of a flat panel display is enhanced.

In addition, the present invention is to provide a method of manufacturing a flat panel display to be able to strengthen the fixed state of the spacer even through a simple process.

In order to realize the above object,

A face plate; A back plate connected to the face plate to form a closed container; Means for emitting light from the container; A plurality of spacers disposed in the container corresponding to the non-display area set on the container and supported by the face plate and the back plate; A bonding media layer disposed on the non-display area and connected to one end of each spacer; A flat panel display comprising a bonding layer disposed between the bonding medium layer and one end of each spacer is provided.

In an embodiment of the present invention, the light emitting means includes: a plurality of cathode electrodes formed in the container on the back plate with a predetermined pattern; An insulating film disposed on the back plate and having a plurality of through parts disposed on the cathode electrodes; A plurality of emitters disposed in each of the through parts and in contact with the cathode electrodes; A plurality of gate electrodes having a predetermined pattern on the insulating layer by retaining the through portions and the through-holes; An anode electrode disposed on the face plate into the vessel; It comprises a plurality of fluorescent layers disposed on each anode electrode having a predetermined pattern.

In addition, the present invention to realize the above object,

A bonding medium layer is formed in a predetermined pattern on the non-display area of the flat panel display plate, a plurality of spacers are disposed on the bonding medium layer, the plate is heated to a temperature below the softening point of the plate, and the contact medium is pressed. The present invention provides a method of manufacturing a flat panel display including supplying a voltage to a spacer so that a current flows between a layer and the spacer.

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

1 is a cross-sectional view illustrating a flat panel display according to an embodiment of the present invention, and the flat panel display to be described in the present embodiment uses a field emission display as an example.

As shown, the flat panel display has a face plate (1) and a back plate (3) which are arranged in parallel with the face plate (1) at predetermined intervals and are coupled to form a sealed container with the face plate (1). It includes.

In the above, a plurality of fluorescent layers 1b are disposed on one surface of the paste plate 1 together with the anode electrode 1a on the anode electrode 1a with a predetermined pattern, and the contrast is improved between the fluorescent layers 1b. For example, a black matrix 1c made of chromium (Cr), chromium / chromium oxide film (Cr / CrOx), or the like is applied.

In addition, as the back plate 3, a plurality of cathode electrodes 3a are formed on one surface facing the anode electrode 1a while maintaining a pattern like, for example, a stripe shape, and the cathode electrode 3a and A plurality of gate electrodes 3c are arranged while keeping the insulating film 3b interposed therebetween in a direction crossing the cathode electrode 3a.

The through portion 30b formed in the insulating film 3b and the hole portion 30c formed in the gate electrode 3c pass through the intersection portion of the cathode electrode 3a and the gate electrode 3b. A chip-shaped field emission emitter 3d is attached above the cathode electrode 3a into 30b.

At the same time, a plurality of spacers 5 are supported in the both plates 1 and 3 and arranged in the both plates 1 and 3, and these spacers 5 are set in the above-mentioned airtight container. It is arranged corresponding to the non-display area.

That is, in FIG. 1, the spacer 5 is disposed on the black matrix 1c as a non-display area, and at this time, between one end of the spacer 5 and the black matrix 1c. The bonding layer 7 formed in the fixing step of the space 5 is formed. The bonding layer 7 will be described later in more detail.

2 and 3 respectively show a state in which the spacers 5 are disposed on the black matrices 1c having different patterns.

First, referring to FIG. 2, as described above, a plurality of fluorescent layers 1b and a black matrix 1c are formed on the face plate 1 while maintaining a stripe type, and a thin plate shape is formed on the black matrix 1c. The spacer 5 which consists of is arrange | positioned.

In addition, in FIG. 3, the fluorescent layer 1b and the black matrix 1c are formed by maintaining a lattice pattern on the face plate 1, and the spacer 5 is disposed on the black matrix 1c. Is placed. At this time, the shape of the spacer 5 may be made of a columnar cross-section cross-shaped, Tee-shaped, H-shaped.

As such, the spacer 5 disposed on the black matrix 1c may be fixed on the black matrix 1c according to the following process. 4 and 5 are schematic views for explaining a method of fixing the spacer 5.

First, referring to FIG. 4, after the fluorescent layer 1b and the black matrix 1c are formed on the face plate 1, the face plate 1 is at a temperature below a softening point (approximately 200 to 200). 400 ° C.).

In this temperature atmosphere, a voltage (DC voltage) is supplied to the spacer 5, where an anode of the power supply 9 is connected to the black matrix 1c, and a cathode of the power supply 9 is connected to the spacer 5. It is connected to one end of the), at this time, it is preferable that a light pressure is applied to the spacer (5).

In this state, when a voltage of approximately 100 to 700 V is applied to the spacer 5, a positive current passes from the black matrix 1c to the spacer 5. In this process, the black matrix 1c As the bonding layer 7 is formed between the spacers 5 as shown in FIG. 5, this allows the spacers 5 to be firmly fixed on the black matrix 1c.

Meanwhile, when voltage is applied to the spacer 5, as shown in FIG. 6, a voltage applying electrode 11 is separately formed at one end of the spacer 5 and connected to the cathode of the power source 9. After the voltage may be applied.

Next, according to the present invention, a process of configuring the flat panel display by arranging the spacer 5 in a non-display area formed on the back plate 3 side will be described.

FIG. 7 is a plan view showing the back plate 3 side in the flat panel display shown in FIG. As described above, in the state where the cathode electrode 3a and the gate electrode 3c cross the back plate 3, the spacer 5 is the cathode electrode 3a and / or the gate electrode 3c. Is placed on top. Of course, at this time, the spacer 5 is disposed in the non-display area portion where the cathode electrode 3a and the gate electrode 3c are different from each other.

FIG. 8 is a cross-sectional view taken along the line A-A of FIG. 7, in which case the spacer 5 is disposed on the cathode electrode 3a. In this way, in order for the spacer 5 to be disposed and fixed on the cathode electrode 3a, a bonding medium layer 13 necessary for fixing the spacer 5 over the cathode electrode 3a is first formed with a predetermined pattern. . The junction medium layer 13 may be selected from a semiconductor such as amorphous silicon, an insulator such as silicon oxide (SiOx), and a metal such as chromium (Cr).

When the spacer 5 is disposed on the bonding medium layer 13, the back plate 3 is heated to a temperature equal to or lower than the softening point as in the above example, and the bonding medium layer 13 is formed in a temperature atmosphere thereof. ), The positive electrode of the power source 9 is connected to the junction medium layer 13, and the negative electrode of the power source 9 is connected to one end of the spacer 5 so that a positive current flows from the spacer 5. The voltage of is supplied.

Thus, the bonding layer 7 is thus referred to as a bonding layer 7 between one side end of the bonding medium layer 13 and the spacer 5. In the case where the bonding medium layer is made of a semiconductor of amorphous silicon, the bonding layer is formed of silicon oxide. Is formed. -Is formed so that the spacer 5 can be stably fixed on the back plate 1 (see FIG. 8).

Of course, when supplying a voltage to the spacer 5, as described in the above-described example, even if the negative electrode of the power source 9 is connected to a voltage applying electrode formed separately at one end of the spacer, then a voltage is applied. good.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the utility model registration claims and the detailed description of the invention and the scope of the accompanying drawings. This also belongs to the scope of the present invention.

As can be seen from the above description, the flat panel display according to the present invention can improve the function of the spacer by strengthening the fixing state of the spacer through a simple process without forming a separate member or notch for fixing the spacer on the plate. It will have an effect.

Therefore, the flat panel display of the present invention provides an advantage of simplifying the process for fixing the spacers, and also has an effect that can be manufactured even in a large size due to the enhanced spacer.

Claims (24)

A face plate; A back plate connected to the face plate to form a closed container; Light emitting means disposed in the sealed container and including a fluorescent layer emitting visible light by electrons emitted from an emitter; Spacers disposed in the container corresponding to the non-display area set on the container and supported by the face plate and the back plate; A junction media layer disposed on the non-display area and connected to one end of each spacer to flow current through the spacer; And a bonding layer formed between the spacer and the bonding medium layer by a current flowing between the spacer and the bonding medium layer. The method of claim 1, The light emitting means includes: cathode electrodes formed on the back plate into the container; An insulating film disposed on the back plate and having a through portion disposed on each of the cathode electrodes; Emitters disposed in each of the through parts and in contact with the cathode electrode; Gate electrodes formed on the insulating layer to hold the through portions and the through-holes; An anode electrode disposed on the face plate into the vessel; A flat panel display comprising fluorescent layers disposed on the anode electrode. The method of claim 1, And a black matrix having said bonding medium layer formed on said face plate side. The method of claim 1, And the junction media layer is disposed on a cathode electrode formed on the back plate. The method of claim 1, And the junction media layer is disposed on the back plate formed gate electrode. The method according to claim 4 or 5, A flat panel display in which the bonding medium layer is made of a semiconductor. The method according to claim 4 or 5, And the bonding media layer is made of metal. The method according to claim 4 or 5, A flat panel display wherein the bonding medium layer is made of an insulator. The method of claim 1, A flat panel display further comprising a separate voltage applying electrode at the other end of each spacer. The method of claim 1, A flat panel display of which the spacer is plate-shaped. The method of claim 1, A flat panel display of which the spacer is a pillar. The method of claim 11, A flat panel display of which the spacer is formed of a pillar having a cross section of a cross. The method of claim 11, And a spacer having a columnar body having an H-shaped cross section. The method of claim 11, A flat panel display of which the spacer is a columnar body having a T-shaped cross section. Forming a bonding medium layer on the non-display area of the plate for flat panel display, Disposing spacers on the junction media layer, The plate is heated to a temperature below the softening point of the plate, And supplying a voltage such that a current flows between the junction media layer and the spacer. The method of claim 15, The plate is a method of manufacturing a flat panel display comprising an anode electrode and a face plate is formed black matrix. The method of claim 15, And the plate comprises a back plate on which a cathode electrode, an insulating film, an emitter, and a gate electrode are formed. The method of claim 15, A method of manufacturing a flat panel display, wherein the bonding medium layer is formed of a semiconductor. The method of claim 15, A method of manufacturing a flat panel display, wherein the bonding media layer is formed of metal. The method of claim 15, A flat panel display manufacturing method of forming the bonding medium layer as an insulator. The method of claim 16, And a spacer on the black matrix. The method of claim 17, And manufacturing the spacer on the cathode electrode. The method of claim 17, And a spacer disposed on the gate electrode. The method of claim 15, And forming a voltage application electrode at one end of the spacer.

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