KR20030066209A - flat deflection electrodes like block structure of Cathode Ray Tube - Google Patents

Abstract

PURPOSE: A cathode ray tube is provided to allow for ease of assembly by improving the structure of flat electrode for emitting electron beams, and accuracy of deflection of electron beam, while reducing costs and installation space. CONSTITUTION: A cathode ray tube(20) comprises a front panel(21), a rear panel(25), a wire cathode ray(26), and an electrode member. The front panel(21) includes a rear surface on which red, green and blue phosphors are deposited. The rear panel(25) is coupled to the rear surface of the front panel in such a manner that the space formed between the front panel and the rear panel is vacuumed. The wire cathode ray(26) is disposed on the rear panel in such a manner that the wire cathode ray is opposed to the phosphors and emits electron beams. The electrode member deflects the electron beam emitted from the wire cathode ray to the phosphors. The electrode member is a block electrode member(27) where electrodes are stacked and integrated.

Description

Cathode ray tube of flat deflection electrodes like block structure

The present invention relates to a cathode ray tube (CRT) in which the electron beam emitted from the electron gun emits a phosphor to emit visible light, and more particularly, it is possible to facilitate the emission and control of the electron beam inside the cathode ray tube. The present invention relates to a cathode ray tube of a block-type flat electrode structure that is simple to assemble, saves installation space and manufacturing cost, and provides high quality images.

In general, cathode ray tubes are widely used as low-cost and high-efficiency display devices. Recently, as the demand of consumers changes to display devices that can provide a large screen while occupying less installation space, organic light-emitting tubes can meet such demands. Alternative products such as EL (Electro-luminescent), LCD (Liquid Crystal Display) and PDP (Plasma Display Panel) have been developed and commercialized. have.

1 is a cross-sectional view showing the main portion of the cathode ray tube according to the prior art.

As shown in FIG. 1, the cathode ray tube according to the related art has a front panel 2 forming a front surface and a fluorescent surface 3 having red, green, and blue phosphors coated on an inner surface of the front panel 2. And a shadow mask 4 for matching the electron beam radiated to the fluorescent surface 3 to the phosphor, and coupled to a rear surface of the front panel 1 to form the outside of the cathode ray tube to maintain the inside in a vacuum state. A funnel 5, a tubular neck portion 5a that is retracted behind the funnel 5, an electron gun 6 mounted inside the neck portion 5a to emit an electron beam, and the funnel It consists of a deflection yoke 7 which surrounds the outside of (5) and deflects an electron beam.

Here, the cathode ray tube 1 emits electrons to the entire fluorescent surface 3 using one electron gun 6, and the minimum distance D between the front panel 2 and the electron gun 6 is The size of the funnel 5 is increased as the size of the cathode ray tube 1 is increased, and consequently, the installation space of the product is required.

Thus, as in the electrode structure of the cathode ray tube shown in FIGS. 2 and 3 (US Patent No. 4955681), a cathode ray tube using a flat electrode structure has been developed.

Figure 2 is a cross-sectional view showing the main portion of the cathode ray tube of the flat electrode structure according to the prior art, Figure 3 is an exploded perspective view schematically showing the electrode member of the cathode ray tube of the conventional flat electrode structure, the flat electrode structure described above The cathode ray tube of the front panel 11 to form a front surface, the fluorescent surface of the red, green, blue phosphor is applied to the inner surface of the front panel 11 and the outside of the cathode ray tube 10 A rear panel 15 coupled to the rear surface of the front panel 11 to maintain the interior in a vacuum state, a wire cathode line 16 positioned inside the rear panel 15 to emit an electron beam, and the A thin plate shape fixed to the rear panel 15 to which power is applied, and fastened by fastening means such as bolts 19 to the frame 18 to deflect the electron beam emitted from the wire cathode ray 16. It consists of an electrode member 17 of.

The electrode member 17 includes a first electrode 17a for drawing an electron beam emitted from the wire cathode ray 16, a second electrode 17b for controlling a signal of the electron beam, and a third for focusing the electron beam. An electrode 17c, a fourth electrode 17d for deflecting the electron beam horizontally, and a fifth electrode 17e for deflecting the electron beam vertically, and the bolt 18 in the frame 18. Is fastened.

However, the cathode ray tube of the plate electrode structure according to the prior art is difficult to manufacture precisely as the size of the plate electrode 17 increases, the assembly process is complicated, and the plate electrode 17 is deformed by its own weight or heat. Accurate deflection of the electron beam is difficult.

In addition, in order to prevent this, since the flat electrode 17 is made of an expensive Invar Metal Sheet, there is a problem in that the manufacturing cost of the product is increased.

The present invention has been made to solve the above problems of the prior art, the assembly is easy to improve by improving the flat electrode emitting the electron beam, less deformation by the weight or heat can be precisely deflected of the electron beam, installation of the product The present invention relates to a cathode ray tube of a block type flat electrode structure that provides high quality images with reduced space and manufacturing cost.

1 is a cross-sectional view showing the main portion of the cathode ray tube according to the prior art,

Figure 2 is a cross-sectional view showing the main portion of the cathode ray tube of the plate electrode structure according to the prior art,

3 is an exploded perspective view schematically showing an electrode member of a cathode ray tube of a plate electrode structure according to the prior art;

4 is a cross-sectional view showing the main portion of the cathode ray tube of the block-type flat plate electrode structure according to the present invention;

5 is an enlarged cross-sectional view of a portion “A” of FIG. 4;

6 is an exploded perspective view schematically showing an electrode member of a cathode ray tube of a block type flat electrode structure according to the present invention;

7 is a perspective view schematically showing a second embodiment of a block electrode of a cathode ray tube of a block type flat electrode structure according to the present invention;

8 is a perspective view schematically showing a third embodiment of a block electrode of a cathode ray tube of a block type flat electrode structure according to the present invention.

<Explanation of symbols for the main parts of the drawings>

20: cathode ray tube 21: front panel

22 fluorescent screen 25 rear panel

26 cathode ray 27 block electrode member

28: connector

The cathode ray tube of the block-type flat plate electrode structure of the present invention for realizing the above object has a front panel coated with red, green, and blue phosphors on the rear surface, and a rear panel of the front panel so as to vacuum between the front panel and the front panel. In a cathode ray tube of a flat electrode structure consisting of a rear panel to be coupled, a wire cathode ray positioned on the rear panel so as to face the phosphor and radiating an electron beam, and an electrode member for deflecting the electron beam emitted from the wire cathode ray to the phosphor. The electrode member may be formed as a block electrode member in which electrodes are stacked and integrated.

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

Figure 4 is a cross-sectional view showing the main portion of the cathode ray tube of the block-type flat plate electrode structure according to the present invention.

As shown in FIG. 4, the cathode ray tube of the block-type flat electrode structure according to the present invention has a front panel 21 forming a front surface, and red, green, and blue phosphors formed on an inner surface of the front panel 21. A rear panel 25 coupled to a rear surface of the front panel 21 to form the coated fluorescent surface 22 and the outside of the cathode ray tube 20 and to vacuum the front panel 21; A wire cathode ray 26 positioned on the rear panel 25 so as to face the fluorescent surface 22 to emit an electron beam, and an electrode member 27 for deflecting the electron beam emitted from the wire cathode ray 26 to the fluorescent surface 22. ').

5 is an enlarged cross-sectional view of part “A” of FIG. 4, and FIG. 6 is an exploded perspective view schematically illustrating an electrode member of a cathode ray tube of a block type flat electrode structure according to the present invention.

As shown in FIGS. 5 and 6, the electrode member 27 ′ includes a plurality of block electrode members 27 in which electrodes are stacked and integrated, and a connector 28 connecting the block electrode members 27. ) Is further included.

The block electrode member 27 includes a first electrode 27a having a hole vertically formed so that an electron beam radiated in a direction perpendicular to the wire cathode ray 26 radiating an electron beam in a radial direction is selected, and the first electrode A second electrode 27b having a hole formed in a horizontal direction so that the electron beam passing through the electrode 27a passes in one direction, and a third that focuses the electron beam passing through the second electrode 27b to radiate to the fluorescent surface as a single point A fourth electrode 27d for horizontally deflecting the electron beam passing through the electrode 27c, the third electrode 27c, and a fifth electrode for vertically deflecting the electron beam passing through the fourth electrode 27d ( 27e), and an insulator is filled and bonded to the gap of each electrode.

Here, the insulator is preferably formed of a glass rod 29 which is a non-conductor for maintaining a constant gap of each electrode.

The connector 28 has a terminal 28a for electrically connecting the block electrode member 27 so that each electrode can operate independently, a conductor 28b for connecting the adjacent terminal 28a, and a lower side thereof. It is composed of a frame 28c installed on the rear panel 25 to fix the conductor 28b on the upper side where the insulating layer 28c is formed.

The cathode ray tube of the block-type flat electrode structure of the present invention configured as described above may be formed as a large area cathode ray tube 20 by arranging the block electrode members 27 of the same size and connecting the connector 28 to the connector 28. .

Looking at the operation of the cathode ray tube of the block-type flat plate electrode structure according to the present invention.

As a predetermined potential is applied to the cathode ray 20 tube of the block-type flat plate electrode structure configured as described above, the electron beam is emitted from the wire cathode ray 26 in all directions, and the electron beam emitted from the wire cathode ray 26 is the first. Only the electron beam in the direction perpendicular to the hole passing through the hole to be formed perpendicular to the electrode 27a is selectively passed. The electron beam passing through the first electrode 27a passes through the hole formed horizontally in the second electrode 27b. Only the electron beam in one direction is selectively passed.

The electron beam radiated in one direction through the second electrode 27b is focused through the third electrode 27c and radiated to the fluorescent surface 22 as one point.

At this time, the electron beam radiated in one direction is deflected in the horizontal direction through the fourth electrode 27d, and is deflected in the vertical direction through the fifth electrode 27e.

That is, the electron beam radiated radially from the wire cathode ray 26 is shielded by the first electrode 27a and the second electrode 27b so that only the electron beam in one direction passes, and the electron beam emitted in one direction is the third electrode ( 27c), the fluorescent surface is focused, and the electron beam is vertically and horizontally moved to the fourth electrode 27d and the fifth electrode 27e to output an image to the front panel 21.

As described above, the cathode ray tube of the block-type flat plate electrode structure 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 the skilled person within the technical scope of the present invention. Of course, various modifications can be made, including materials.

FIG. 7 is a perspective view schematically showing a second embodiment of a block electrode of a cathode ray tube of a block type flat electrode structure according to the present invention, and FIG. 8 is a third perspective view of a block electrode of a cathode ray tube of a block type flat electrode structure according to the present invention. An embodiment is a simplified perspective view. Here, the same reference numerals as in the above-described drawings indicate the same members.

For example, the block electrode member 27 may be integrally formed by stacking electrodes separated in the horizontal direction as shown in FIG. 7, or integrally formed by stacking electrodes separated in the vertical direction as shown in FIG. 8. have.

Therefore, the cathode ray tube of the block-type flat plate electrode structure according to the present invention configured as described above is configured such that the integrated block electrode members are interconnected by stacking electrodes, and can be manufactured regardless of the size of the cathode ray tube, The assembly process is simple, integrally formed to reduce the deformation due to its own weight or heat can increase the productivity, there is an effect that can improve the quality.

Claims (6)

A front panel coated with red, green, and blue phosphors on the rear surface; a rear panel coupled to the rear side of the front panel such that the front panel is vacuumed; and an electron beam positioned at the rear panel to face the phosphor. In the cathode ray tube of the flat electrode structure consisting of a wire cathode ray to emit and an electrode member for deflecting the electron beam emitted from the wire cathode ray to the phosphor, The electrode member is a cathode ray tube of a block-type flat plate electrode structure, characterized in that the electrode is formed of a block electrode member integrated with a stack. The method of claim 1, The block electrode member is a cathode ray tube of a block-type flat electrode structure, characterized in that the insulator is filled in the gap between each electrode. A front panel coated with red, green, and blue phosphors on the rear surface; a rear panel coupled to the rear side of the front panel such that the front panel is vacuumed; and an electron beam positioned at the rear panel to face the phosphor. In the cathode ray tube of the flat electrode structure consisting of a wire cathode ray to emit and an electrode member for deflecting the electron beam emitted from the wire cathode ray to the phosphor, The electrode member is a cathode ray tube of a block-type flat electrode structure, characterized in that the electrode is stacked further comprising a plurality of integrated block electrode member and the connector connecting the block electrode member. The method of claim 3, wherein The connector comprises a terminal electrically connecting the block electrode member, a conductor to which the adjacent terminal is connected, and a lower side of the connector, the frame being configured to fix the conductor to an upper side where an insulating layer is formed. Type cathode ray tube. The method of claim 3, wherein The block electrode member is a cathode ray tube of a block-type flat electrode structure, characterized in that the electrodes separated in the horizontal direction are stacked integrally formed. The method of claim 3, wherein The block electrode member is a cathode ray tube of a block-type flat electrode structure, characterized in that the electrodes separated in the vertical direction are stacked integrally formed.