KR100274241B1 - Flat type cathode ray tube - Google Patents

Abstract

PURPOSE: A flat type cathode ray tube is provided to reappear a color image on a screen by forming modulation electrode, convergence device, and R, G, B phosphor on the screen. CONSTITUTION: A preliminary vertical deflection electrode(54) deflects an electron beam emitted from the cathode preliminarily . A vertical deflection electrode(55) makes a 90 degree deflection of an electron beam which deflected from the preliminary vertical deflection electrode(54). A horizontal deflection electrode(61) makes a horizontal deflection of an electron beam that is deflected by the vertical deflection electrode(55). A screen(53) shows a picture. A several modulation electrode(2) is located at the lower part of the cathode to license each R, G, B image signal at the electron beam emitted from the cathode. A first, and a second face electrode(4,5) are formed with an electron beam pass hole(3) which is formed corresponding to the modulation electrode(2). A third face electrode(7) is formed with an electron beam pass slit(6). A fourth, and a fifth face electrode(10,11) are formed with a convergence device(8) and an aperture(9) which selects an electron beam. A fluorescent surface(12) is sprayed on the screen(53) to reappear color corresponding to each R, G, B electron beam.

Description

Flat cathode ray tube

1 is a schematic exploded perspective view showing a flat cathode ray tube according to the present invention,

FIG. 2 is a state diagram showing that thermal electrons emitted from the linear cathode in FIG. 1 are modulated by a modulating electrode,

3 is a state diagram showing a vertical deflection state of the electron beam by the vertical preliminary deflection electrode and the vertical deflection electrode in FIG. 1;

4 is a state diagram showing a focused state of the electron beam by the converging means in FIG.

5 is a state diagram showing another embodiment of FIG.

6 is a schematic cross-sectional view showing a fluorescent surface according to the present invention;

7 is a schematic exploded perspective view showing a conventional flat cathode ray tube.

<Explanation of symbols for main parts of drawing>

1: back glass 2: modulation electrode

3: electron beam passing hole 4: first surface electrode

5 second surface electrode 6 electron beam passage slit

7: third surface electrode 8: convergence means

9: aperture 10: fourth planar electrode

11: 5th surface electrode 12: fluorescent surface

[Industrial use]

The present invention relates to a flat cathode ray tube, and more particularly, to a flat cathode ray tube capable of realizing a color in a flat cathode ray tube.

[Prior art]

In general, a flat cathode ray tube was developed to replace a conventional cathode ray tube using a bulb, which is almost impossible to manufacture as it becomes larger than 40 ". 60-189849, which shows a back electrode 50, a linear cathode 51 positioned on an upper surface thereof to emit an electron beam as shown in FIG. 7, and the cathode 51 described above. A modulating electrode 52 for modulating the electron beam emitted from the light source, and a preliminary vertical deflection electrode 54 and a vertical deflection electrode 55 for deflecting the electron beam emitted from the modulating electrode 52 toward the screen 53. And first, second, third, fourth and fifth surface electrodes 56, 57, 58, 59 and 60 for focusing and accelerating the deflected electron beam as described above, and the horizontal deflection electrode 61 for horizontally deflecting the electron beam. ) And the phosphor 62 to which light is emitted by the electron beam is applied. It consists of a lean (53).

In this case, the operation of the electron beam is accelerated by the back electrode 50 when the electron beam is emitted from the cathode 51, and is accelerated by the first and second surface electrodes 56 and 57, so that the electron beam generates a predetermined acceleration force. This not only passes through the preliminary vertical deflection electrode 54 but also causes the angle to be bent.

In particular, after the electron beam passes through the first surface electrode 56, the electron beam passes through a modulation electrode 52 that applies an image signal to the electron beam, thereby controlling the electron beam by the modulation electrode 52.

In this case, a plurality of the modulation electrodes 52 are formed to divide and control the electron beam.

As described above, the electron beam that is bent in advance is deflected at an angle capable of vertically hitting the screen 53 by the vertical deflection electrode 55, and is formed to be long on the third, fourth, and fifth surface electrodes 58, 59, and 60. It is accelerated and focused by passing through the electron beam through hole 63.

A plurality of electron beams passing through the third, fourth, and fifth planar electrodes 58, 59, and 60 pass through the horizontal deflection electrode 61. The horizontal deflection electrode 61 is the modulated electrode 52. It is installed so as to correspond to the ()) to split the deflection of the electron beam to more accurately control the deflection of the electron beam.

As described above, the deflected electron beam strikes the front surface of the screen 53 to which the single phosphor 62 is applied to reproduce a predetermined monochrome image.

[Problem trying to solve the invention]

However, in the above-described flat cathode ray tube, not only the phosphor 62 is a single phosphor but also the electron beam through holes 63 of the third, fourth and fifth planar electrodes 58, 59, and 60 are formed one by one, so that the color sorting means is provided. Also, since it is formed in a plate shape, there is a problem in that a color cannot be realized because an electrostatic lens for convergence of R, G, and B colors cannot be formed.

Accordingly, an object of the present invention is characterized in that the collar can be spherical in a flat cathode ray tube.

[Means to solve the problem]

In order to realize the above object, the present invention is to form one or a plurality of modulation electrodes for controlling each of the R, G, B electron beams on the back glass, and to place the cathode on the upper portion of the cathode, The first and second surface electrodes formed of one or more pairs are positioned on the upper portion of each of the R, G, and B electron beams so as to correspond to the modulating electrode, and the preliminary vertical deflection electrode and the vertical deflection electrode are orthogonally disposed thereon. In addition, a third planar electrode having one or a plurality of electron beam passing slits corresponding to each electron beam is positioned so as to be parallel to the vertical deflection electrode, and at one side thereof, R, G, and B are collected at one point of the screen. The fourth and fifth surface electrodes on which convergence means are formed and a plurality of dot or stripe-shaped apertures having a color sorting function are formed are placed, and horizontal deflection electrodes Characterized by forming a screen on which the phosphor mixed with the R, G, B colors are applied.

[Action]

When the electron beam is emitted from the linear cathode, an image signal is input to R, G, and B beams by one or more formed modulation electrodes to control each beam, and the R, G, and B angles The electron beam is accelerated through the electron beam passing holes of the first and second surface electrodes, respectively, and is deflected so as to vertically strike the screen by the preliminary vertical deflection electrode and the vertical deflection electrode.

Each of the R, G, and B electron beams deflected as described above passes through the electron beam passing slit of the third planar electrode, and each electron beam passes through the apertures of the fourth and fifth planar electrodes, and is selected at the same time. By passing, each color is concentrated on one point of the screen.

Here, the converging means described above can be formed regardless of the formation of the electrostatic lens even if the concave portions are formed to face each other, or the concave portions formed on the fourth surface electrode are removed, and the concave portions are formed to protrude in the same direction.

The focused R, G, B, and electron beams pass through the aperture of the horizontal deflection electrode and impinge on the phosphor of the screen by the horizontal deflection electrode provided thereon to emit light of R, G, B, and the respective phosphors. That is, the color is reproduced.

In particular, when the modulation electrode, the convergence means, the horizontal deflection electrode, and the electron beam passing slit are formed in large numbers, the phosphor is divided and driven, thereby improving the deflection accuracy of the electron beam and the image quality of the screen periphery.

EXAMPLE

FIG. 1 is an exploded perspective view showing a flat cathode ray tube according to the present invention, in which two modulation electrodes 2 formed in three sets to control each of R, G, and B on top of the back glass 1 are formed. First and second surface electrodes 4 and 5 having a linear cathode 51 positioned thereon, and having a plurality of electron beam passing holes 3 formed so as to correspond to the modulation electrode 2 described above. Is arranged on the upper side, and the preliminary vertical deflection electrode 54 is positioned on the upper side thereof, and the vertical deflection electrode 55 is formed in the orthogonal direction thereof, and on the third surface on which the electron beam passing slit 6 is formed. Fourth and fifth planar electrodes 10 and 11 on which the electrodes 7, the convergence means 8, and the apertures 9 are formed, and the screen 53 on which the horizontal deflection electrodes 61 and the fluorescent surface 12 are formed. ) Are arranged in sequence.

After a predetermined cut-off voltage is applied to the linear cathode 51, the electron beam is modulated and emitted in a state where an image signal is applied by the modulation electrodes 2 assigned to R, G, and B, respectively.

Here, the modulation electrode 2 is located below the cathode 51, but can be applied to the image signal even if located above the cathode 51, this configuration has a drawback that becomes more complicated .

As described above, the thermal electrons from which the electron beam is emitted pass through the electron beam of each of the modulation electrodes 2 and the corresponding first surface electrode 4 formed with the cathode 51 therebetween as shown in FIG. Passing through each of the balls 3 is accelerated by the voltage applied to it.

As shown in FIG. 3, the electron beam accelerated by the first planar electrode 4 is formed of an electron beam passing hole 3 so as to correspond to the electron beam passing hole 3 of the first planar electrode 4. Electron beam passing slit 6 so as to correspond to the bilateral electrode 5, the preliminary vertical deflection electrode 54 provided on the upper surface thereof, the vertical deflection electrode 55 positioned on the upper surface thereof, and the electron beam passing hole 3 described above. ) Is bent 90 degrees by the third planar electrode 7 formed thereon.

Here, by slightly bending by the preliminary vertical deflection electrode 54 and then again by the vertical deflection electrode 55 can be easily bent 90 degrees.

The electron beam, which is bent 90 degrees by the vertical deflection electrode 55, passes through the fourth and fifth surface electrodes 10 and 11 having a plurality of apertures 9 and convergence means 8 having a color screening function. As described above, the aperture 9 serves the same function as an electron gun (not shown) in a conventional cathode ray tube, and the convergence means 8 transmits R, G, and B electron beams to the screen 53. Landing on each of the phosphors R, G, B applied correctly.

Referring to the action of the convergence means 8 described above, as shown in FIGS. 4 and 5, the recesses 13 and 13 'are symmetrical with each other on the fourth and fifth planar electrodes 10 and 11. The recess 13 ′ of the fifth planar electrode 11 is formed to protrude in the direction of the screen 53 and the electrostatic lens is applied by applying a higher voltage to the fifth planar electrode 11 than the fourth planar electrode 10. To form an electron beam.

Of course, the concave portions 13 and 13 'may not be formed in the fifth planar electrode 11, but the concave portions 13 may be formed to protrude in the opposite direction of the screen 53 to the fourth planar electrode 10 only. Since the electrostatic lens is formed, it focuses.

When the fourth planar electrode 10 is formed as described above, the convergence may be adjusted by changing the voltage applied to the fourth and fifth planar electrodes 10 and 11.

As described above, when the electron beam is focused to the center portion of the screen 53, the horizontal deflection electrode 61 is horizontally deflected, and as shown in FIG. 7, R and G are provided with the barrier 14 interposed therebetween. When the B phosphor is laminated on the screen 53 on which the fluorescent surface 12 is coated, the predetermined color is reproduced.

Of course, in addition to the above-described fluorescent surface 12, even if other fluorescent surface that can implement a color, the effect is the same.

Here, since the horizontal deflection electrode 61 is formed in two sets, the peripheral portion of the screen 53 can be more clearly expressed by deflecting half of the screen 53 with the screen 53 divided in half. It becomes possible.

Of course, as described above, two pairs of modulated electrodes 2 and corresponding two pairs of portions 3, 6, 8, and 9 are formed so that a color image can be reproduced even though only one pair is formed. The color reproduction ability of the periphery is deteriorated.

[Effects of the Invention]

As described above, the present invention forms modulation electrodes for controlling the R, G, and B colors, and forms apertures for selecting respective electron beams and convergence means for focusing the electron beams on the fourth and fifth surface electrodes. In addition, R, G, and B phosphors can be formed on the screen to reproduce color images on the screen.

Claims (5)

The linear cathode 51, the preliminary vertical deflection electrode 54 for preliminarily deflecting the electron beam emitted from the cathode 51, and the electron beam predetermined deflected from the preliminary vertical deflection electrode 54 are 90 In the flat-type cathode ray tube which consists of the vertical deflection electrode 55 which deflects a figure, the horizontal deflection electrode 61 which horizontally deflects the electron beam deflected by the said vertical deflection electrode 55, and the screen 53 in which an image appears. In order to apply R, G, and B image signals to the electron beam emitted from the cathode 51, a plurality of sets of modulation electrodes 2 located below the cathode 51, and the modulation electrode described above The first and second planar electrodes 4 and 5 on which the electron beam passing holes 3 corresponding to (2) are formed, and the electron beam passing slit 6 so as to correspond to the modulated electrode 2 in the orthogonal axis state. The third planar electrode 7 formed and the side portion of the third planar electrode 7 described above and The converging means 8 is formed to correspond to the electrode 2, and the fourth and fifth planar electrodes 10 and 11 on which the aperture 9 is formed to select the electron beam collide with the screen 53. And a fluorescent surface 12 applied to the screen 53 so as to reproduce the color corresponding to each of the R, G, and B electron beams. A flat cathode ray tube according to claim 1, characterized in that the modulation electrode (2) is arranged under the cathode (51). The method of claim 1, wherein only one pair of modulation electrodes 2 are formed and only one pair of electron beam passing holes 3, convergence means 8, and apertures 9 are formed. Flat cathode ray tube. 2. The converging means (8) formed in the fourth and fifth planar electrodes (10, 11) has concave portions (13, 13 ') symmetric with each other, and the concave portion of the fifth planar electrode (11). 13 'is a flat cathode ray tube, characterized in that formed to protrude in the direction of the screen (53). The method of claim 1, wherein the fifth planar electrode 11 is formed by forming a recess 13 protruding in the opposite direction of the screen 53 to the fourth planar electrode 10 only without forming the recess 13 '. Flat cathode ray tube, characterized in that.