KR100353791B1 - Field Emission Display Device and Manufacturing Method thereof by using Funnel - Google Patents

Abstract

PURPOSE: A field emission display device using a funnel and a fabricating method thereof are provided to simplify a fabricating process by removing a spacer from a main space and an auxiliary spacer from an auxiliary space. CONSTITUTION: A funnel(10) includes a lower substrate installation side, a projection(14), the first exhaust portion, and the second exhaust portion(17). The lower substrate installation side is installed at both sides of the funnel(10). A sealant is coated on the projection(14). The first exhaust portion and the second exhaust portion(17) are formed at a lower side portion of the funnel(10). A lower substrate(20) is installed on the lower substrate installation side. A field emitter is formed on the lower substrate(20). An upper substrate(30) is formed at an upper portion of the funnel(10). An anode and a phosphor are stacked on the upper substrate(30). An edge of the upper substrate(30) is adhered to both sides of the lower substrate(20) by using the sealant.

Description

Field emission display device and manufacturing method using funnel {Field Emission Display Device and Manufacturing Method

The present invention relates to a field emission display device, and in particular, to manufacture a funnel to form a separate auxiliary space in order to facilitate a high vacuum packaging process, and to fix the both sides of the lower substrate to the funnel, the upper substrate on the top of the funnel The present invention relates to a field emission display device using a funnel and a method for manufacturing the same, which facilitate the movement of gas from the main space to the auxiliary space, thereby easily manufacturing the inside of the field emission display device in a desired vacuum state.

In general, flat panel display devices that are used are displayed on the screen by the generated electrons collide with the phosphor. Therefore, in order to increase the free moving distance of electrons, a high degree of vacuum of about 10-6 torr is required. Therefore, in a display element requiring high vacuum, a process of exhausting gas molecules remaining inside the display element is essential. The most common method used in the exhaust process is to connect an exhaust pipe formed of a material such as glass to the display device, exhaust the gas inside the display device using a vacuum pump, and then use a torch lamp or the like to separate the display device and the exhaust pipe. The exhaust pipe is heated, sealed and cooled in a semi-melt state by a method such as allowing electricity to pass through the resistor. At this time, a small amount of gas generated when the exhaust pipe is heated to a semi-melt state does not significantly affect the degree of vacuum when the volume of the portion to be maintained in the vacuum, such as CRT, is large. However, in order to obtain a high-quality image like the field emission display device, the gap between the upper substrate and the lower substrate has a small width of about 100 to 200 μm, and when the internal volume is very small compared to the large screen, it greatly affects the degree of vacuum. Will have a big impact on performance. Therefore, in the case of flat panel display devices such as field emission display devices, a process of encapsulating while reducing the amount of exhaust gas in the vacuum packaging is important.

In addition, when the screen of the field emission display device becomes larger than several tens of inches, the conductance of the gas flow becomes worse, so that it is very difficult to vacuum the inside of the field emission display device to a high vacuum of 10-6 Torr.

However, the above-described field emission display device according to the related art has a small time interval between the upper substrate and the lower substrate, and the conductance of the gas molecules is small due to the spacers, so that the pressure of the adjacent parts of the exhaust pipe and the far away parts are equally increased. There was a problem that the installation of the getter (getter) is not easy.

In order to solve the above problems, an auxiliary substrate and an auxiliary spacer are formed on the rear surface of the lower substrate so that the auxiliary space is provided, so that the field emission display device which is easy to install and flatten the exhaust and getter of gas existing in the main space is devised. It became.

In the field emission display device having the auxiliary space, the gas in the main space is moved to the auxiliary space through an exhaust port formed in the lower substrate below the main space, so that the gases in the main space are not completely discharged through the exhaust port during vacuum pumping. There is this. In addition, since the auxiliary substrate is installed and the side surface is sealed by the sealant, the auxiliary substrate may be damaged by the compressive stress during the vacuum pumping. In addition, there is a problem in that the manufacturing process is complicated because an exhaust port must be formed on the lower substrate so that the main space can communicate with the auxiliary space.

The present invention provides a funnel constituting the auxiliary space in order to solve the problems of the conventional auxiliary space, the groove for installing the lower substrate constituting the field emission display device, and the upper and lower substrates after the sealing for sealing the interior space In order to prevent the inflow of the sealant during firing with a squeezable jaw and a sealant, two exhaust tubings for flowing nitrogen or hydrogen gas and exhausting the gas in the inner space after sealing the sealant are provided. Manufactured to include, the lower substrate is installed in the installation grooves formed on both sides, and the upper substrate is installed on the top of the funnel and sealed by a sealant, so that both sides of the main space through the auxiliary auxiliary space to form an exhaust port in the lower substrate It is an object of the present invention to make the inside of the field emission display device high vacuum.

1 is a partial perspective view showing a funnel to form an auxiliary space according to the present invention and to install the upper and lower substrates.

FIG. 2 is a perspective view showing a lower substrate in which a field emitter is formed in the funnel of FIG.

3 is a perspective view showing an upper substrate in which a phosphor and an anode electrode are formed in a funnel in which a lower substrate of FIG. 2 is installed;

〈Description of the symbols for the main parts of the drawings〉

10: funnel 11: auxiliary space

12: upper substrate mounting surface 13: lower substrate mounting surface

14: sealant mounting surface for joining the lower substrate

15: Sealant installation surface for joining the upper substrate

16: 1st exhaust vent 17: 2nd exhaust vent

20: lower substrate 30: upper substrate

The present invention relates to vacuum sealing a field emission display device using an angled square cylindrical casting for auxiliary space.

1 shows a funnel used in the present invention, in which the funnel 10 is formed by a molding method of pouring a liquid glass into a mold. The shape of the formed funnel 10 has a rectangular cylinder shape as shown in the figure, and forms two first and second exhaust holes 16 and 17 having a tubular shape at the bottom thereof. In addition, both side surfaces of the funnel 10 is formed with a lower substrate mounting surface 13 having a predetermined depth and width from the top of the funnel 10, the sealant for fixing and bonding the lower substrate on the outer wall of the formed funnel 10 The first coated part (hereinafter referred to as "first jaw, 14") and the sealant applied for fixing and bonding the upper substrate (hereinafter referred to as "second jaw, 15") are formed. The lower substrate mounting surface 13 of the funnel 10 is a position where the lower substrate is to be mounted, and the first and second jaws 14 and 15 have a sealant coated with a sealant, such as a wall thickness of the lower portion of the funnel 10. The thickness will be formed. The upper substrate is attached to the upper substrate mounting surface 12 forming the upper end of the funnel 10. Therefore, the depth of the lower substrate installation surface 13 is the depth plus the thickness of the lower substrate and the separation distance from the upper substrate. In addition, two exhaust ports 16 and 17 are formed under the funnel 10. In this case, only the exhaust port may be formed, but in order to reduce the process, since the funnel 10 is formed by molding, the exhaust port 16 and 17 having the exhaust pipe may be formed by manufacturing the funnel when the frame is formed to have a tubular shape. It is also possible.

FIG. 2 shows that the lower substrate 20 on which the field emitter is formed is mounted on the lower substrate installation surface 13 of the funnel 10 shown in FIG. 1, and the lower substrate 20 is formed of glass. The lower substrate is manufactured to fit to the lower substrate mounting surface 13 of the funnel 10, and the cathode (not shown) is formed along both sides of the lower substrate 20 to be bonded to the funnel 10 ( The electrode lines can be drawn to both sides of 20). At this time, a getter ground is installed to install a getter in the space between the lower substrate and the funnel.

FIG. 3 shows that an anode electrode and an upper substrate 30 having a phosphor (not shown) are bonded to an upper portion of the funnel 10 in which the lower substrate 20 shown in FIG. 2 is installed. The size of the upper substrate 30 is made to match the size of the outer diameter of the funnel 10 to be bonded to the upper substrate mounting surface 12, the lower substrate mounting surface 13 is not formed funnel 10 An anode electrode is formed to derive the anode electrode line on both sides of the. In addition, the phosphors are formed in pixel units only in the portion overlapping with the cathode electrode of the lower substrate 20 on the anode electrode.

The upper substrate 30 is bonded to the upper substrate mounting surface 12 of the funnel 10 as described above, and the upper substrate 30 is formed from the first and second jaws 14 and 15 formed on the side surface of the funnel 10. A sealant, which is a sealant, is applied to the upper portion of 30 to seal the inside of the upper and lower substrates 20 and 30.

As described above, in order to prevent the sealing agent from flowing into the inside of the funnel and contaminating the elements formed on the upper and lower substrates in the process of firing the outer wall of the funnel coated by the sealing agent, except for the exhaust port, A nitrogen or hydrogen supply is connected to an exhaust tubule for supplying nitrogen or hydrogen, and the sealant is calcined while exhausting nitrogen or hydrogen supplied to another exhaust tubule.

After the sealant is fired, the supply of nitrogen or hydrogen is stopped, and a vacuum pump is connected to each exhaust port to discharge nitrogen or hydrogen present in the main space between the auxiliary space formed by the funnel and the upper and lower substrates. Make the space the desired vacuum. Next, when the desired vacuum is reached, the exhaust tubules are melt-bonded to complete the field emission display device having an auxiliary space using a funnel.

As described above, in the field emission display device using the funnel, the funnel is made of a strong casting to bond the upper and lower substrates, so that the spacer on the main space and the auxiliary space on the auxiliary space formed in the field emission display device having the conventional auxiliary space are formed. There is no need to install it, which simplifies the process.

In addition, the upper and lower substrates mounted on the funnel are bonded to both sides, so that both sides of the unbonded main space serve as an exhaust port, thereby facilitating the exhaust of the main space and simplifying the process since there is no need to form an exhaust port in the lower substrate. have.

In addition, by manufacturing and using the exhaust port of the funnel in the form of exhaust tubing during the molding process, it is possible to simplify the process and facilitate the exhaustion than when conventionally pumped by inserting the exhaust pipe into the exhaust port.

In addition, when the sealing agent is fired by using two exhaust pipes, nitrogen or hydrogen gas may be introduced into the inner space, thereby preventing contamination of the device due to the inflow of the sealing agent into the inner space.

Claims (4)

Square-shaped funnel having a lower substrate installation surface formed on both sides concave from the top, a jaw on which the sealant is formed around the circumference, and at least one exhaust port formed through the lower side in communication with the inside and outside ; A lower substrate mounted to the lower substrate installation surface of the funnel and having a field emitter formed thereon; An upper substrate bonded to an upper portion of the funnel at a predetermined interval from the lower substrate, wherein an anode electrode and a phosphor are stacked; And A field emission display device using a funnel comprising a sealant applied from a jaw of the funnel to seal the edges of the upper substrate and both sides of the lower substrate. The method of claim 1, The field emission display device using the funnel, characterized in that the material of the funnel is soda glass. The method of claim 1, A field emission display device using a funnel, characterized in that a getter is installed on the bottom surface of the funnel. Manufacturing a rectangular cylindrical funnel comprising a lower substrate mounting surface and a sealant to be coated with a jaw and two exhaust holes; The length of one side is equal to the size of the lower substrate mounting surface of the funnel, the other side is to form a field emitter on the lower substrate matching the length of the side of the non-installation surface of the funnel, Forming an anode electrode and a pixel unit phosphor on one surface of an upper substrate having a size corresponding to an outer diameter edge of the funnel; Mounting the lower substrate on which the field emitter is formed on the lower substrate installation surface of the funnel; Bonding the upper substrate on which the anode electrode and the phosphor are formed to the upper substrate mounting surface of the funnel so that the phosphor is downward; Sealing the edges of the lower substrate mounted on the lower substrate mounting surface of the funnel and the upper substrate bonded to the upper substrate mounting surface of the upper portion of the funnel by applying a sealant from the side jaws of the funnel; Firing the sealant while introducing nitrogen or hydrogen gas into the funnel through the first exhaust port of the funnel on which the sealant is applied and discharging nitrogen or hydrogen gas to the second exhaust port; The method of manufacturing a field emission display device using a funnel comprising the step of blocking the nitrogen supply after the sealant is fired and connecting a vacuum pump to discharge and seal the internal air.