KR20050029548A - Flat panel display device - Google Patents

Abstract

A flat panel display device is provided to form a screen by using a proximity exposure method or a screen printing method, and simplify manufacturing procedures and reduce costs by eliminating the necessity of forming holes at the side wall of the plasma display device. A flat panel display device comprises a front panel(100) including a screen on which a phosphor is deposited; a cathode for generating electron beams so as to emit light from the phosphor; a plurality of electrode units for deflecting, focusing, and controlling the electron beams; and a rear panel(110) where the cathode and the electrode units are attached. The front panel and the rear panel form a package structure. The rear panel has four side walls for spacing the rear panel apart from the front panel. At least two or more side walls from among the four side walls are formed integrally with each other.

Description

Flat Panel Display Device

The present invention relates to a flat panel display device, and more particularly, to a flat panel display device, characterized in that the rear panel of the flat panel display device is integrally formed with at least two surfaces of at least two sides of the side wall to be spaced apart from the front panel by a predetermined distance.

As an image display device of a general color television, a cathode ray tube (CRT) is commonly used. However, the CRT has a considerably longer internal length than the screen, making it impossible to produce a thin television receiver using the cathode ray tube.

However, EL (Electro Luminescence) display devices, plasma display devices, and liquid crystal display devices that are being developed are inferior in performance such as brightness, contrast, and color reproducibility compared to the cathode ray tube.

Therefore, recently, a beam scan type flat panel display device having a shorter distance from the cathode to the anode in the conventional cathode ray tube method has been actively developed. The beam scanning type flat panel display device displays a line by dividing a plurality of screens on the screen in the vertical and horizontal directions, and emits phosphors by deflecting the electron beam in the horizontal direction or the vertical direction for each divided screen. to be.

This will be described in detail with reference to FIG. 1, which shows a flat display device according to the prior art.

The flat panel display device according to the prior art includes a front glass (1), a back glass (2) which is a panel bonded to the front glass by an insulating adhesive, a predetermined high-voltage terminal hole (4), and a positive (+) A high voltage terminal 3 of the pole and an exhaust pipe 5 for evacuating the inside of the windshield and a voltage application terminal 6 for applying a voltage to the plurality of electrodes and the negative pole are formed and integrated with the windshield. It is comprised by the side wall (not shown) formed.

An electrode unit (not shown) having an extremely short distance from the cathode to the anode portion (not shown) and a cathode (not shown) serving as an electron beam generating source for generating an electron beam are formed inside the windshield 1 and the back glass 2 bonded to each other. The electrode unit is provided with a small diameter hole or slit for deflecting, focusing and controlling the electron beam emitted from the cathode, so that the electron beam is controlled by the hole or slit of each electrode. It is configured to emit light through the phosphor applied to the anode portion.

In addition, the high voltage terminal 3 and the voltage application terminal 6 connected to the positive electrode and the negative electrode are discharged to the outside through the side wall and the rear glass 2 and are connected to a driving circuit or a signal processing circuit. As the voltage is applied to the electron beam, the electron beam is emitted from the cathode, and the emitted electron beam strikes the screen formed on the inner surface of the windshield through the plurality of electrodes, thereby exposing the flat panel display device to function as a television receiver or display device. Do it.

On the other hand, the method of forming a screen on the inner surface of the windshield (1) is a RGB fluorescent material, which is a conventional phosphor coating method on the inner surface of the windshield with a side wall integrated using a screen mask using rollers, respectively. A method of forming a screen by pushing, a proximity exposure method that can apply RGB fluorescent material in turn, and then use an exposure machine to form a fine pitch, and a screen that can apply respective phosphors to a desired position and reduce the loss of phosphors. Printing method.

However, the flat panel display device according to the related art has four sidewalls formed near the windshield 1 so as to surround the windshield, and the corners between the windshield and the sidewall are not completely flat but have curvature. It is coming true.

Therefore, a method of forming a screen on the inner surface of the windshield 1 in which the sidewalls are integrated by using a roller and a screen mask may cause a problem that the phosphor of the screen may not be applied in an appropriate amount. In particular, the proximity exposure method or the screen printing method has a problem that the application itself is impossible.

In addition, in order to make the screen emit light, a high voltage must be applied through an external circuit. For this purpose, a high-voltage terminal is connected through the hole after a hole is drilled in the side wall. Rather than forming the glass 1 together during press molding, the glass 1 should be formed by drilling a hole after forming the windshield.

Therefore, since the residual stress exists in the portion where the high-pressure application hole is formed in accordance with the above-described process, stress concentration occurs. Therefore, when the substrate is continuously exposed to high temperature or passes through a thermal process in the assembly manufacturing process of the flat panel display device. There is a problem that is likely to cause cracks in the windshield.

The present invention has been made to solve the above problems of the prior art, to form a screen using a near-exposure method or a screen printing method, and to form a flat panel display device with a front glass, which is a panel, to simplify the manufacturing process. In the rear panel, it is an object of the present invention to provide a flat panel display unit which is formed integrally on at least two or more sides of the side wall to the predetermined distance from the front panel.

According to an aspect of the present invention, a flat panel display device includes a front panel including a screen coated with a phosphor, a cathode for generating an electron beam to emit the phosphor, and deflecting, focusing, and controlling the electron beam. And a plurality of electrode units for attaching the cathode and the plurality of electrode units to form a package structure with the front panel, wherein the rear panel has at least two sides of at least two sides of a side wall for a predetermined distance from the front panel. It is characterized in that it is integrally formed with.

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

Since the configuration of the flat panel display apparatus according to the present invention is similar to that of the conventional invention with reference to FIG. 1, description thereof will be omitted.

Here, as shown in FIG. 2 illustrating a first embodiment of a flat panel display device according to the present invention, the flat panel display device includes a rear panel 110 having sidewalls integrally formed on surfaces facing each other, and the rear surface. It is configured to include a front panel 100, the side wall 120 is integrally formed on each of the remaining surfaces of the rear panel 110, the side wall is formed to form a package structure with the panel.

In addition, referring to FIG. 3, a second embodiment of a flat panel display device according to the present invention will be described. The flat panel display device includes a rear panel 210 having two sidewalls integrally formed on surfaces adjacent to each other, and the rear panel. Consists of a front panel 200 in which side walls 220 are integrally formed on the remaining surfaces of the rear panel on which side walls are formed to form a package structure with 210.

Therefore, the flat panel display device according to the present invention configured as described above is separated from the front panel 100 and a part of the side wall 120, thereby forming a screen (not shown) on the inner surface of the front panel 100. In this way, a close exposure method may be applied to form a fine pitch over the entire inner surface of the front panel 100.

In addition, in forming the screen on the front panel 100, the screen printing method is applied to the front glass 100 to reduce the loss of the phosphor and to apply each phosphor to a desired position, using a drill hole It is possible to connect a high voltage terminal (not shown) to allow a high voltage current to be applied to the screen between them without being formed.

The plurality of electrodes constituting the inside of the flat panel display device and the terminal for applying a negative voltage (not shown) may be connected to the outside through the front panel 100 and the rear panel 110. In this case, the front panel 100 and the rear panel 110 are combined with an insulating adhesive of a frit glass material.

In this case, the internal structure of the flat panel display apparatus according to the present invention will be described in detail with reference to FIG. 4, which illustrates the internal structure of the flat panel display apparatus.

First, the inside of the flat panel display device includes a back electrode 121, a line cathode 122, an electron beam extraction electrode 123, a signal electrode 124, a focusing electrode 125, a horizontal deflection electrode 126, and a vertical deflection electrode. 127 is configured.

The cathode cathode 122 is provided in a horizontal direction so that an oxide cathode material is coated on a surface of a tungsten wire to maintain an interval and generate an electron beam 130 distributed in a horizontal direction.

In addition, the back electrode 121 which is installed in parallel to maintain the predetermined interval with respect to the front cathode 122 is located on the rear panel 110 side is used as a conductive material of the rear panel 110, The extraction electrode 123 is disposed in front of the front cathode 122 toward the front panel 100 to face the rear electrode 121, and has a plurality of through holes installed to maintain a predetermined interval in a horizontal direction. It is comprised by the conductive plate arrange | positioned on the horizontal line so that the line of time) may face each linear cathode 122. As shown in FIG.

On the other hand, the signal electrode 124 is composed of a line (line) of a plurality of conductive plates arranged in a vertical direction while maintaining a constant interval to face each of the plurality of through holes, the conductive plate has a thin long shape It comprises a through hole of the same shape formed in a position facing the plurality of through holes.

The focusing electrode 125 is formed of a conductive plate similar to the signal electrode 124 and includes a through-hole having the same shape formed at a position opposite to the through-hole of the signal electrode 124, respectively. 126 is comprised by the electrically conductive board connected by the comb-shaped edge part which mutually interlocked horizontally and interposed at fixed intervals on the same plane.

In addition, the vertical deflection electrode 127 is composed of a conductive plate connected by two comb-shaped ends that are vertically engaged with each other by placing a predetermined interval on the same plane, the plurality of electrodes by a fastening bolt (not shown) The fastening bolts are fastened to each other and are coupled to an electrode support structure (not shown) and adhered to the rear panel 110 by an insulating adhesive.

In addition, the screen 128 formed on the inner surface of the front panel 100 is coated with a phosphor that emits light by scanning the electron beam 130 on the inner surface of the glass container, on which an Al (Aluminum, not shown) film is deposited. It is applied.

In this case, the internal structure of the flat panel display will be described with reference to FIG. 5, which is a detailed cross-sectional view of the inside of the flat panel display.

The plurality of electrode units 160 are in turn fastened by the fastening bolts 130, and the fastening bolts 130 are coupled to the long side frames 180 to form the electrode support structure 170b by the welding pieces 170a. It is fixed to the rear panel 110 with.

The back electrode (not shown) and the linear cathode 180 are positioned between the plurality of electrode units 160 and the rear panel 110, and terminals for applying voltages of the electrodes and the cathodes derived from the respective electrode ends. 140 is welded at the connection point before sealing the glass container of the front panel 100 and the rear panel 110.

In addition, after press-molding the windshield 100 having side walls connected thereto, a high voltage terminal (not shown) for applying a high voltage to the screen may be connected to the outside through the front panel and the rear panel. do.

The operation of the flat panel display device according to the present invention having the above configuration will be described with reference to FIG. 4.

First, a current flows through a heater so that electrons emitted from the front cathode 122 are easily released. When a predetermined (-) voltage is applied to the back electrode 121 in the heating state and a predetermined (+) voltage corresponding to the (-) voltage applied to the back electrode 121 is applied to the extraction electrode 123. Electrons present on the surface of the line cathode 122 are emitted to the electron beam 130 by a potential difference generated between the rear electrode 121 and the extraction electrode 123.

In this case, the emitted electron beam 130 is divided into a plurality of through-holes of the lead-out electrode 123 to form a plurality of electron beams, and the plurality of electron beams correspond to an image signal applied to the signal electrode 124. The amount of passage of the electron beam 130 passed by the electrode 124 is adjusted, respectively.

 The electron beam 130 passing through the signal electrode 124 is focused and shaped by the electrostatic lens effect of the through hole of the focusing electrode 125 and then adjacent to each other in the shape of the comb teeth of the horizontal deflection electrode 126. The plate and the vertical deflection electrode 127 are deflected horizontally and vertically by the potential difference applied to the adjacent conductive plates in the shape of combs.

In addition, the electron beam 130 accelerated to high energy while passing through the plurality of electrodes 123 to 127 collides with an Al film of the screen 129 to which a high voltage of about 10 KV is applied to emit a phosphor to reproduce a moving image. do.

In addition, when the screen 129 is divided into a matrix and composed of a plurality of subdivision assemblies, each subdivision and the electron beam correspond to one-to-one so that the electron beam is deflected and scanned only within each subdivision. It is possible to express the moving picture in higher quality.

As described above, the flat display device according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed herein, and may be applied within the scope of the technical idea.

The flat display device of the present invention configured as described above has a structure in which the structure is separated into a front panel, a side wall, and a rear panel so that a fine pitch can be formed, or each phosphor is applied to a desired position and the phosphor is coated. The screen can be formed through a screen printing method, which is a method of reducing the loss of the product. Since the high pressure applying terminal for applying high pressure to the screen does not have to form a hole in the side wall, the productivity of the product and The reliability can be improved, and the production process can be simplified and the material cost can be reduced.

1 is a view showing a flat panel display device according to the prior art;

2 is a diagram showing a first embodiment of a flat panel display device according to the present invention;

3 is a view showing a second embodiment of a flat panel display device according to the present invention;

4 is a diagram showing the configuration of a flat panel display device according to the present invention;

5 is a detailed view illustrating a part of the flat panel display device according to the present invention.

<Explanation of symbols on main parts of the drawings>

100, 200: panel 110, 210: rear panel

120, 220: side wall portion

Claims (5)

A front panel including a screen coated with phosphors; A cathode for generating an electron beam to emit the phosphor; A multi-electrode unit for deflecting, focusing, and controlling the electron beam; In the rear panel to which the negative electrode and the plurality of electrode units are attached, forming a package structure with the front panel, The rear panel is a flat panel display device, characterized in that the side wall which is separated from the front panel by a predetermined distance is integrally formed on at least two sides of the slope. The method of claim 1, The rear panel is a flat panel display device, characterized in that the side walls are integrally formed on the surface facing each other. The method of claim 2, The front panel is a flat panel display device, characterized in that the side wall is formed integrally with each other on the other side of the rear panel having a side wall formed to form a package structure with the rear panel. The method of claim 1, The rear panel is a flat panel display device, characterized in that the side wall is formed integrally with each other adjacent to each other. The method of claim 4, wherein The front panel is a flat panel display device, characterized in that the side wall is formed integrally with each other on the other side of the rear panel having a side wall formed to form a package structure with the rear panel.