TW516066B - Electron gun for cathode-ray tube and cathode-ray tube - Google Patents

Abstract

The present invention provides an electron gun for cathode-ray tube and cathode-ray tube, in which spot size of the multi-beam electron gun is small and wherein the electron beams do not deviate from their paths even when the drive voltage fluctuates. A multi-beam electron gun for a cathode-ray tube for projecting electron beams onto a fluorescent screen to bombard phosphor crystals of the same color of the cathode-ray tube and a cathode-ray tube having such an electron gun are disclosed. Electron beams (SB1, SB2) are emitted for the phosphor of the same color of a cathode-ray tube. Electron beam passing holes common to the electron beams (SB1, SB2) are formed in the front-stage lens (PL) and the main lens (ML). The electron beams (SB1, SB2) cross each other between the front-stage lens (PL) and the main lens (ML). The spot size of the multi-beam electron gun is small, and the electron beams do not deviate from their paths even when the drive voltage fluctuates. Thus, a high-resolution cathode-ray tube producing a favorable picture is realized.

Description

16066 A7 B7 V. Description of the Invention (1) Technical Field of the Invention The present invention relates to an electron gun for a cathode ray tube and a cathode ray tube provided with the electron gun. The electron gun for the cathode ray tube constitutes a multi-beam electron gun, which is the same color fluorescent lamp for the cathode ray tube. The light body emits several electron beams and irradiates the fluorescent surface. Prior art In recent years, there has been an increasing demand for cathode ray tubes having high definition, high brightness, and low driving voltage. In order to achieve high definition, for example, an attempt is made to reduce the aperture diameter of the electron beams of the first electrode and the second electrode of the electron gun to reduce the spot size. However, when the electron beam passing apertures of the first electrode and the second electrode of the electron gun are reduced, in order to ensure a sufficient amount of current to obtain the required brightness on the display, the driving voltage must be increased. When the driving voltage increases, the signal followability in high-frequency driving is poor. Therefore, a so-called multi-beam electron gun has been proposed, the purpose of which is to reduce the spot size of the electron beam passing holes of the first electrode and the second electrode without increasing the driving voltage. Previous electron guns formed an electron beam passing hole to a cathode. In the above proposal, two electron beam passing holes are formed in a cathode with a first electrode and a second electrode. Thereby, two electron beams can be emitted to the phosphors of the same color of the cathode ray tube, and the respective colors can be displayed. In addition, the above-mentioned structure is provided with a common cathode for the two electron beam passing holes. However, it can also be set separately for each electron. Beam passing hole. -4- This paper size applies to China National Standard (CNS) A4 specification (210X 297 mm) 16066 A7 B7 V. Description of the invention (2) structure. Regardless of the structure, several electron beams for the same color display can be emitted. In this way, by forming two electron beam passage holes for the same color phosphor display of two cathode ray tubes separately, the current can be doubled under the same driving voltage and the size of the electron beam passage holes. As a result, even if the electron beam passing hole is reduced, the amount of current passing through each electron beam passing hole is halved, and the same current amount as before can be obtained as a whole. Therefore, the display can be obtained without increasing the driving voltage. Enough brightness. Therefore, by reducing the electron beam passing hole, the spot size of the electron beam on the screen can be reduced. In addition, since there is no need to increase the driving voltage, the followability of the signal waveform is good even with high-frequency driving. Problems to be solved by the invention

However, the above-mentioned configuration of the multi-beam electron gun can be considered in two configurations, namely, forming two electron beam passing holes for each cathode of the first electrode and the second electrode, and other electrodes forming electron beam passing holes shared by the two electron beams. In addition to the structure of other electrodes, two electron beam passing holes (separate) are also formed on each cathode. Among them, the other electrodes (after the third electrode) also form multiple electron guns for the two electron beams to form independent electron beam passing holes, so that the positions of the electron beam passing holes of the first electrode and the second electrode are in front of other electrodes. The central axis of the lens and the main lens roughly match. However, at this time, due to the electrons of the electrodes constituting the front lens and the main lens, the size of this paper is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 516066 A7 _______B7 V. Description of the invention (3) beam Two electron beams are formed separately through the holes, so that the diameter of the front lens and the diameter of the main lens become smaller, and the electron beam easily absorbs lens aberrations. As such, the aberration of the absorption lens causes the spot size to become large. In addition, in the multi-electron guns in which the other electrodes (after the third electrode) form a common electron beam passing hole for the two electron beams, since the lens diameter can be enlarged, it is difficult to absorb the lens aberrations. However, at this time, since the positions of the several electron beam passing holes of the first electrode and the second electrode are not the same as the central axis of the segment lens and the main lens, the electron beams in the front lens and the main lens are directed toward the central axis. Due to the force of light, a halo (amorphous aberration) appears on the spot shape so that the spot size becomes larger. As described above, since the purpose of the multi-beam electron gun is to reduce the spot size, it is not appropriate to increase the spot size. In addition, when a quadrupole lens is provided in the multi-beam electron gun to improve the focusing characteristics of the day-surface angle drop portion, the following problems arise. As mentioned above, when the front lens and the main lens are independent of several electron beams, the quadrupole lens is also set separately for the several electron beams. Therefore, the diameter of the quadrupole lens is also reduced, and the quadrupole lens is also The aberration of the absorption lens makes the spot size larger. In addition, when the front lens and the main lens share several electron beams, because the electron beams of each color of R'G'B are deviated from the center of the quadrupole lens, the electron beam is affected by the quadrupole, and the upper, lower, left, and right are uneven. There is a problem that the spot size at the corner of the screen becomes large. In addition, due to the electron gun containing multiple electron guns, when the driving voltage is changed in order to increase the amount of current, the acceleration of the electrons is changed due to the change in the driving voltage. -6-This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ) 516066 A7 B7 V. Description of the invention (4) The electron beam is deviated from the way of the electron beam, and the electron beam is irradiated to the adjacent fluorescent screen, which also causes brightness deviation and color deviation. However, in the application of the multi-beam electron gun, there is a high-brightness mode (TV mode), which is used to display high-brightness images received on TV, and a low-brightness, high-definition mode (PC mode), which is used on personal computers, etc. The display performs low-brightness, high-definition display. Considering that these are switched for day-to-day display, or the screen area is divided into various modes for display. In order to realize a cathode ray tube having these two display modes, several electron beams of the same-color phosphor emitted from a multi-beam electron gun can be distributed to the two display modes. However, due to the structure of the previous multi-beam electron gun, the above-mentioned problems of the increase in the spot size, the problem of brightness deviation and color deviation caused by changing the driving voltage to increase the amount of current, and the light in the corners of some screens when a quadrupole lens is provided There is a problem that the dot size becomes large, and therefore, it is difficult to realize a cathode ray tube having two display modes. In order to solve the above problems, the present invention provides an electron gun for a cathode ray tube and a cathode ray tube provided with the electron gun, which can reduce the spot size of a plurality of electron guns. At the same time, even if the driving voltage is changed, the electron beam track does not deviate. High-resolution cathode-ray tube with good image. Solution to the Problem The electron gun for a cathode ray tube of the present invention emits several electron beams to the same-color phosphors of the cathode ray tube. An electron beam passing hole shared by several electron beams is formed in the front lens and the main lens, so that the plurality of electron beams are passed through. Cross between the front lens and the main lens. This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm) 516066 A7 B7 V. Description of the invention (5) The cathode-ray tube of the present invention is provided with an electron gun, which is the same color phosphor of the cathode-ray tube. A plurality of electron beams are emitted, and an electron beam passing hole shared by the plurality of electron beams is formed on the front lens and the main lens, so that the plurality of electron beams cross between the front lens and the main lens. According to the structure of the electron gun for the cathode ray tube of the present invention, since the front beam lens and the main lens are formed with electron beam passing holes shared by several electron beams, the plurality of electron beams cross between the front beam lens and the main lens, and several electrons The beam is affected by the effects of the front lenses (such as coma aberrations and changes in the electron beam's behavior) as opposed to the effects of the main lens, so these effects can be offset by each other. By adopting the structure of the cathode ray tube of the present invention as described above, since the electron gun for the cathode ray tube of the present invention is provided, the electron beam can be offset by the action of the front lens and the electron beam by the action of the main lens, without increasing the light spot on the fluorescent surface. The change, therefore, significantly reduces the change in light spot. Embodiments of the invention The present invention provides an electron gun that emits several electron beams to the same-color phosphor of a cathode ray tube. The electron gun passes through the front lens and the main lens, and an electron beam passing hole shared by the electron beams is formed to make several An electron gun for a cathode ray tube in which an electron beam crosses between a front lens and a main lens. Further, the present invention is structured such that, in the above-mentioned electron gun for a cathode ray tube, a quadrupole lens is arranged near or at the intersection of a plurality of electron beams. In addition, the structure of the present invention is such that in the above-mentioned electron gun for a cathode ray tube, two electron beams are emitted to the same-color phosphor, a first electrode opposite to the cathode, and a second electrode provided on a fluorescent surface end of the first electrode. Medium, two electrical-8- This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm) 516066 A7 B7 V. Description of the invention (6) One of the sub-beams through which the electron beam passing hole is large Aperture, the other of the two electron beams. The electron beam passing hole is a small aperture, where one electron beam and the other electron beam are switched to each other and emitted. In addition, in the structure of the present invention, in the above-mentioned electron gun for a cathode ray tube, the first electrode is divided so that each electron beam emitted is independent. Further, in the present invention, in the above-mentioned electron gun for a cathode ray tube, the first electrode is divided into two parts so that one of the two electron beams and the other are independent of each other. The invention provides a cathode ray tube, which is provided with an electron gun. The electron gun emits several electron beams to the phosphors of the same color of the cathode ray tube. A plurality of electron beam passing holes shared by the electron beams are formed on the front lens and the main lens, respectively. An electron beam crosses between the front lens and the main lens. In addition, the present invention is structured such that, in the above-mentioned cathode ray tube, a quadrupole lens is arranged near or at the intersection of the electron beams of the electron gun. In addition, the structure of the present invention is that, in the above-mentioned cathode ray tube, two electron beams are emitted to the same-color phosphor, a first electrode opposite to the cathode and a second electrode provided on the fluorescent surface end of the first electrode, The electron beam passing hole of one of the two electron beams has a large aperture, and the electron beam passing hole of the other of the two electron beams has a small aperture. One of the electron beams and the other electron beam are switched and emitted from each other. In addition, in the structure of the present invention, in the above-mentioned electron gun for a cathode ray tube, the first electrode is divided so that each electron beam emitted is independent. In addition, the structure of the present invention is that, among the above-mentioned electron guns for cathode ray tubes, the size of the paper is -9-, applicable to China National Standard (CNS) A4 (210 X 297 mm) 516066

The first electrode is divided into two parts so that one of the two electron beams is independent of the other. Fig. 1 shows a side view of an electron gun for a color cathode ray tube according to an embodiment of the present invention. In addition, Fig. 2 is a perspective view showing important portions of each electrode of the electron gun for a color cathode ray tube shown in Fig. J. The electron gun for color cathode-ray tube i 〇 has two cathodes K (kr, KG, KB) corresponding to red, green, and monitors arranged in a line, a first electrode 11, a second electrode 12, a third electrode 13, and a fourth electrode. The electrode 14, the fifth electrode 15, the sixth electrode 16, the seventh electrode 17, and the eighth electrode 18. The fifth electrode 15 is divided into three such as a 5-1th electrode 51, a 5-2th electrode 52, and a 5-3th electrode 53. The rear section of the eighth electrode 18 is provided with a convergent cap 20 integrated therewith. In addition, 22 in FIG. 1 indicates a stem for supplying a voltage to an electrode of the electron gun 10. The first electrode 11 is separated into each negative KB, and is divided into two parts in the vertical direction, and is divided into six in total. The first electrode 1 1 (lIRi, 11R2, 11Gl, 11 (j2, 11B !, 11B2)) which is divided into six is formed with a small circular electron beam passing hole. The second electrode 12 is in an integrated plate. In the shape electrode, two cathodes, kr, Kg, and KB, are formed, each having a total of six small circular electron beam passing holes. Thus, the first electrode 11 and the second electrode are opposed to each cathode. KR, KG, KB are separately formed with two electron beam passing holes each, and two electron beams can be emitted from one cathode. -10-: -—__ _ ^ This paper size applies to China National Standard (CNS) A4 specifications ( 210X 297 mm) 516066 A7 B7 V. Description of the invention (8 In addition, by dividing the first electrode 丨 丨 into 6 parts, the driving signal can be input separately on each electrode divided into 6 parts, which constitutes the cathode K The driving method of the potential difference between the second electrode 12 and each of the first electrodes is to control the emission amount of the electron beam (the so-called Gi driving method). By dividing the first electrode li into 6 parts, it can be formed in the vertical direction v The interval between the electron beam passing holes of the first electrode divided into two parts above and below, and , Arrange the electron beam passing holes of each first electrode as close to the central axis of the front lens and the main lens as possible. In addition, the electron beam passing holes of the second electrode 12 are arranged at the same interval as the electron beam passing holes of the first electrode 11. The front lens PL is formed by the third electrode 13, the fourth electrode 14, and the first electrode 51. Three cathode beam passing holes are provided on the cathode κ end of the 5-1 electrode 51, and a common large hole is provided on the anode end. In addition, a quadrupole lens QL is formed by the 5-2 electrode 52 and the 5-3 electrode 53. As shown in FIG. 2, the 5-3 electrode 53 is structured to be arranged above and below the rectangular electron beam passage hole which is long The eaves 5 3 A projecting to the 5-2 electrode 5 2. The electron beam passing hole of the 5-2 electrode 5 2 is provided with a horizontal direction corresponding to the eaves 53A of the 5-3 electrode above and below the thin and long rectangle. The hole is formed in an I-shape. In addition, the structure of the 5th electrode 53 is mounted on the sixth electrode 16 and is supplied with the same potential. The main lens is formed by the sixth electrode 16, the seventh electrode 17, and the eighth electrode 18. ML. The main lens ML focuses the three-color electron beams of R, G, and B, and irradiates the specified position on the fluorescent surface of the cathode-ray tube. -11 - This paper scale applicable Chinese National Standard (CNS) A4 size (210 X 297 mm) 516066 A7 B7

These ττ electrodes 16, seventh electrodes 17, and

18 have intermediate voltages to be signed separately. That is, the electrode plates 16B, 17B, 16A and 16C, 17A and 17C, 18A of the seventh beam passing hole. An anode voltage P is supplied from the resistors 23 to 3 through terminals or the like not shown in the figure, and the seventh electrode 17 is a so-called intermediate electrode to which an intermediate electrode is supplied. Therefore, by supplying an intermediate voltage to the seventh electrode 17, a focusing voltage to the sixth electrode 16, and an anode voltage to the eighth electrode 8, a double-potential type large-diameter main lens ML can be constructed. Each of the electrodes 13, 14, and 51 of the QL constituting the quadrupole lens constitutes each of the electrodes 52'53 of the QL, and each of the electrodes 16,17,18 of the main lens ML is exaggerated due to the lens diameter. The upper and lower electron beams are shared by the electron beam passing holes. In addition, in this embodiment, the position where the electron beam that has passed through the second electrode 12 is incident on PL and the main lens μ L is adjusted. In order to eliminate the coma aberration of the front lens PL and the main lens ML, The two electrodes 12 are welded to form electrode plates 12A with cylindrical holes of various colors R'G'B to adjust the strength of the convex lens between the second electrode 12 and the third electrode 13. An enlarged view of the electrode plate 1 2 A is shown in FIG. 3. With this electrode plate 2 A thickness D, the second electrode can be adjusted! 2-the intensity of the convex lens between the third electrode 1 and 3. However, the coma aberration caused by the lens strength of the front lens PL, if it is an electron beam at the upper end in the vertical direction, because the central axis of the front lens PL is based on the Chinese paper standard (CNS) A4 (210 X 297 mm) (Centimeter) 516066 A7 B7

The invention description (10) passes the upper end, so the halo is pulled down. If it is the electron beam at the lower end in the vertical direction, pull the halo upward. Therefore, in this embodiment, the electron beam located at the upper end of the vertical lens PL is adjusted so that the electron beam enters the lower end of the central axis of the main lens ML, so that it is absorbed by the main lens ML and absorbed by the front lens PL. The coma aberration in the opposite direction of the art aberration. Similarly, in the front lens PL, the electron beam located at the lower end in the vertical direction is adjusted so that the electron beam enters the upper end of the central axis of the main lens ML. The lens intensity of the front lens P L is adjusted to eliminate the coma aberration between the front lens P L and the main lens M L. That is, as shown in FIG. 4A described later, the upper and lower electron beams are structured to cross between the front lens P L and the main lens M L. Fig. 4 is a model diagram showing the arrangement of each lens in the center of the screen of the cathode ray tube and the orbit of the electron beam passing through the lens. FIG. 4A shows a vertical direction, and FIG. 4B shows a horizontal direction. As shown in FIG. 4A, for the same cathode, two electron beam passing holes of the first electrode 11 are arranged at a pitch ρ, and the two electron beams SB1 and SB2 are emitted upward and downward. The orbits of the two electron beams SB1 and SB2 are corrected by the convex lens L between the second electrode 12 and the third electrode 13 and are incident on the front lens toward the central axis of the lens system shown by the dotted line segment in FIG. 4A. PL. The two electron beams SB1, SB2 cross each other after passing through the front lens PL, and pass through the other end of the central axis of the lens system on the main lens M L.

With this structure, each of the electron beams SB 1, SB2 is at the front lens P L -13- This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm)

Binding

516066 A7

516066 A7 _ B7 V. Description of the invention (12) A concave lens effect is generated toward V, and a convex lens effect is generated in the horizontal direction 所示 shown in FIG. 5B. As shown in FIG. 5A, in this embodiment, a quadruple lens QL is arranged at the intersection of the electron beams SB1 and SB2 in the vertical direction V between the front lens pl and the main lens ML, and the quadrupole lens is passed through At QL, since the two electron beams SB1 and SB2 pass through the central axis of the lens system, absorption of aberrations from the quadrupole lens QL can be avoided. In addition, the quadrupole lens QL can generate a quadrupole effect in the vertical direction V and the horizontal direction η, and can achieve good light spot characteristics at the corners of the screen. In addition, the position of the quadrupole lens QL may not coincide with the intersection of the upper and lower electron beams SB1 and SB2. If it is arranged near the intersection, the absorption of aberration from the quadrupole lens QL can be avoided in the same manner. In addition, since the quadrupole lens QL has no effect in the center of the screen, even if the quadrupole lens QL is provided, in the center of the screen, the lens effect on the electron beams SB 1 and SB2 is only three as shown in FIG. 4. Lenses L, PL, ML. According to the above embodiment, by intersecting the two electron beams SB1, SB2 between the front lens PL and the main lens ML, the effect of the coma aberration of the front lens PL and the coma aberration of the main lens ML can be offset. effect. In addition, on the first electrode 11 and the second electrode 丨 2, by adjusting the execution of the two electron beams SB1 and SB2 that are incident on the front lens PL and the main lens ML, the front lens PL and the main lens ML can be adjusted. The coma aberration is canceled out to form a structure without coma aberration. The electron beam passage holes corresponding to the two electron beams SB1 and SB2 are not located at the center of the front lens PL and the main lens ML, but, as in the previous -15- this paper standard applies to China National Standard (CNS) A4 Specifications (210X297 mm) 516066 A7 ________B7 V. Description of the invention (13) The single-beam electron gun is the same as the electron gun with the first electrode 11-foot electron beam passing hole in the center of the front lens pL and the main lens] ^] 1. , Can form a good spot size. In addition, since the orbit of the electron beam does not deviate due to a change in the driving voltage, it does not cause deviations in color and color deviation of the electron beams that reach the fluorescent surface (fluorescent screen) and the adjacent phosphors. Furthermore, since the quadrupole lens ql is arranged at or near the intersection of the two electron beams SB1 and SB2, the two electron beams SB1 and SB2 pass near the center of the quadrupole lens QL and are generated at the corner of the screen. Balanced quadrupole effect. Therefore, the corners of the screen can avoid focusing deterioration due to the spot size being increased by the quadrupole lens QL. Therefore, by including the color cathode ray tube electron gun 10 according to this embodiment, a color cathode ray tube can be constructed, and a good image with a small spot size can be obtained. At the same time, scanning can be performed at double speed, and the service life is doubled. For example, when the images displayed by the two electron beams are superimposed by signal processing ', even if the current amount of each electron beam is the same as before, the brightness of the displayed image can be doubled. In addition, if the brightness of the image is the same as before, the high-definition display can be implemented by reducing the current amount of each electron beam by half. Therefore, by using the electron gun for a color cathode ray tube according to this embodiment, a high-definition display can be realized on a display, a television image receiver, and the like. The following "actually make the color cathode-ray police electron of this embodiment" and review its characteristics. First, FIG. 6 shows the electron gun for a color cathode ray tube of the present embodiment-16. This paper size is in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 516066 A7 B7 V. Description of the invention (14) 1 0, When the electron beam passing aperture of the front lens PL is set to 5 mm, the relationship between the thickness D of the electrode plate 12A of the second electrode 12 and the coma aberration is changed. According to FIG. 6, when the thickness D of the electrode plate 12A of the second electrode 12 is 0.65 mm, the coma aberration is zero. The allowable amount of coma aberration is set to ± 0.05 kV. In addition, FIG. 7 shows the structure of the multi-beam electron gun of the present invention (the electron gun 10 for a color cathode ray tube in the embodiment of FIG. 1), the conventional single-beam electron gun, and a structure in which several electron beams of the same cathode are not crossed as a comparison. Multi-beam electron gun, the result of comparing the relationship between the amount of current and the spot size. According to Fig. 7, it is known that the spot size of the multi-beam electron gun of the present invention is compared with the spot size of the previous single-beam electron gun, and the two are equal. In addition, the spot size of the multi-beam electron gun of the comparative example shown by the dotted line in the figure becomes larger. That is to say, the multi-beam electron gun of the present invention can form a good spot size. In addition, FIG. 8 shows the multi-beam electron gun of the present invention (the electron gun 10 for a color cathode ray tube according to the embodiment of FIG. 1) and a multi-beam electron gun having a structure in which several electron beams of the same cathode are not crossed as a comparison. The result of the relationship between the amount of current passing through the hole of the electron beam located at the lower ends of the first electrode 11 and the second electrode 12 in the vertical direction and the position of the light spot on the fluorescent surface. It can be seen from FIG. 8 that even if the current amount of the multi-beam electron gun of the present invention changes, the position of the light spot does not change. In addition, the spot positions of the multi-beam electron gun of the comparative example shown by the dotted line in the figure are changed. -17- This paper size is in accordance with Chinese National Standard (CNS) A4 specification (210 X 297 mm) 516066 A7 B7 V. Description of the invention (15) That is, it can be known that due to the multi-beam electron gun of the present invention, even if the current amount changes, the light spot The position does not change, so color deviation and brightness deviation do not occur. The description will continue to other embodiments of the present invention. The structure of the above embodiment shown in FIGS. 1 and 2 is a G1 driving method in which the first electrode 11 is divided into six parts and the potential of the first electrode is adjusted for driving. The electron gun for a cathode ray tube of the present invention may also be used. A cathode driving method is adopted in which the potential of the cathode K is adjusted for driving. This is shown below. Fig. 9 is a perspective view showing an electrode structure showing an important part of an electron gun for a color cathode ray tube according to another embodiment of the present invention. FIG. 9 shows the cathode K, the first electrode 11, the second electrode 12, and its electrode plate. In this embodiment, the cathode driving method is adopted, and the first electrode 11 is composed of one electrode. For each of the cathodes Kr, Kg, and KB, two longitudinal electron beam passing holes are formed.

In addition, after the third electrode not shown in the figure, the two electron beams emitted from the same cathode are crossed between the front lens P L and the main lens M L as in the above embodiment shown in FIG. 2. The cathode driving method of this embodiment is also the same as that of the G1 driving method of the above embodiment. 'The convex lens strength between the second electrode and the second electrode can be used to offset the coma of the front lens PL and the main lens ML. In addition, even if the amount of current is changed, the orbit of the electron beam can be kept unchanged. Fig. 10 is a perspective view showing an electrode structure of an important part of an electron gun for a color cathode ray tube according to another embodiment of the present invention. -18- This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm) 516066 A7 ____ B7 V. Description of the invention (16) Figure 10 also shows the cathode K, the first electrode 11, and the second electrode 12 And its electrode plate 1 2 A .. This embodiment is also constituted by adopting a cathode driving method and a first electrode sheet electrode. For each of the cathodes KR, KG, and κB, two electron beam passing holes in the lateral direction are formed. Thereby, six electron beam passing holes arranged in the lateral direction are formed in the first electrode 11 and the second electrode 12. In addition, after the third electrode not shown in the figure, the two electron beams emitted from the same cathode are intersected between the front lens p L and the main lens M L in the same manner as in the above embodiment shown in FIG. 2. Although the six electron beams of this embodiment are arranged horizontally, but after the third electrode not shown in the figure, three electrons are provided for each of the cathodes KR, KG and KB, which are the same as the embodiment shown in FIG. 2. The beam passes through the hole. This makes it possible to reduce the influence of lens aberrations on the electron beams, as when the six electron beam passing holes are provided, and the lens is not reduced by the electron beam passing holes. Therefore, a good spot size can be formed. In the above embodiments, although the present invention is applied to an electron gun for a color cathode ray tube in which cathodes are respectively provided for three colors of r, g, and b, if the present invention is a multi-beam electron gun that emits several electron beams to one cathode, It is applied to the electron guns and cathode ray tubes of cathode ray tubes of other structures. For example, the present invention can also be applied to monochromatic cathode ray tubes (black and white and monochromatic, various color cathode ray tubes for projectors, etc.), and a multi-electron beam can be configured to cross between a front lens and a main lens. Beam electron gun. At this time, since the quadrupole lens is not needed, the corners of the screen are also taken as shown in Figure -19- This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) V. Description of the invention (17) 4 structure. In addition, in each of the above embodiments, the structure of the beam, m bristle / shoots two electrons to a cathode, but the present invention can also adopt the structure of a beam of electrons, at this time, two r丨 Cross between two or more main lenses. (1) In the front lens and further, the present invention is not limited to the same structure as that of the cathode ray tube, and of course, it can also be applied to the structure corresponding to separate cathodes. One cathode emits several electron beams, and the color phosphor emits several electron beams. The% poles of each electron beam are set through holes. In addition, the original core can be applied to both the high-brightness mode, the low-brightness mode, and the high-definition mode. Display mode, a color cathode ray tube and its electron gun that can display the images broadcast by television and the images used by computer monitors. The embodiment at this time is shown below. Fig. 11 is a perspective view showing an electrode structure of an important part of an extracted electron gun for a color cathode ray tube according to another embodiment of the present invention. FIG. 11 shows the cathode K, the first electrode ^, the second electrode 12 and its electrode plate 12A. This embodiment is the same as the electron gun for a color cathode ray tube shown in FIG. 2, the first electrode 11 is divided into six (11R1, 11R2, 11Gi, 11CV 1%, 11B2). 〇 By dividing the first electrode 11 into 6 In part, similar to the electron gun for a color cathode ray tube of FIG. 2, a driving method (the G1 driving method as shown) that controls the amount of emitted electron beams by the potential difference ′ of the cathode K, the second electrode 12 and each of the first electrodes is configured. Because of this, the space between the upper and lower electron beams passing through the hole is -20- This paper size applies the Chinese National Standard (CNS) A4 (210 X 297 mm) 516066 A7 B7 V. Description of the invention (18) The electron beam passing holes of the electrodes are as close as possible to the positions of the central axes of the front lens PL and the main lens ML. However, in this embodiment, the first electrode is divided into 6 parts, and the electron beams of the upper electrodes (llRi, 11G !, 11B !, etc.) form large circular holes through the holes, and the lower electrodes (11R2, 11G2, 11B2, etc.) (3) The electron beam passes through the holes to form small circular holes. In addition, the electron beam passing hole of the second electrode 12 also corresponds to the electron beam passing hole of the opposite first electrode. The three electron beam passing holes at the upper end form a large circular hole, and the three electron beam passing holes at the lower end form a small circular hole. . This is different from the electron gun of FIG. 2 in which the size of the electron beam passing holes of the six first electrodes 11 to 12 and the size of the six electron beam passing holes of the second electrode 12 to 12 are the same. The other structure of the electron gun is the same as that of FIG. 2 and therefore, the repeated description is omitted. Since the electron beam passing holes at the upper ends of the first electrode 11 and the second electrode 12 in this embodiment are large circular holes, increasing the amount of passing electron beams, that is, the amount of current (for example, usually a current of 1 m A) can improve the brightness. . Therefore, the electron beam passing through the hole with a large aperture at the upper end can correspond to a large current and display in a high-brightness mode. In addition, since the electron beam passing holes at the lower ends of the first electrode 11 and the second electrode 12 are small circular holes, reducing the amount of electron beams passing through, that is, the amount of current (for example, usually 0.3 mA) can suppress brightness, and By reducing the spot size of the electron beam on the fluorescent surface, high-definition image display can be performed. Therefore, the light point rule can be reduced by passing the electron beam with a small aperture at the lower end through the hole. -21-This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 516066 A7 B7 V. Description of the invention (19) Inch, can display in low brightness and high definition mode. That is, the structure of the present embodiment is such that two electron beams are emitted from the same color phosphor from above and below, on the first electrode opposite to the cathode K and the second electrode 12 provided on the fluorescent surface end of the first electrode 11 The electron beam passing hole through which the upper electron beam passes among the two electron beams has a large aperture, and the electron beam passing hole through which the lower electron beam passes through the two electron beams has a small aperture. Among them, in particular, the first electrode 11 is divided into 6 points so that the 6 electron beams emitted are independent of each other. The structure of the two display modes of the high brightness mode, the low brightness, and the high-definition mode is to form the screens of each display mode separately, and to change the screen structure (screen switching display) or to distinguish the screens in the area for each display mode. To perform scanning, switch the structure of two display modes (area switching display) in each area at the same time. Furthermore, when any of the above-mentioned switching displays is performed, only one of the two electron beams above and below the same-color phosphor is emitted and irradiated on the fluorescent surface, and the other electron beam is not emitted. Therefore, when the display mode is switched, the interactive switching is adopted, that is, the structure of the emitted electron beam and the emitted electron beam is exchanged. Specifically, since this embodiment adopts the G 1 driving method, the voltages respectively supplied to the three first electrodes llRi, llGi, and llBi located at the upper end for the high-brightness mode are supplied to the low-brightness, high-definition The mode uses the voltage of the three first electrodes 11R2, 11G2, and 11B2 at the lower end. When one of the modes is displayed, it is used as the electron beam emission voltage. In the other mode, it is used as the electron beam not emitted voltage (such as close to For cathode -22- This paper scale applies Chinese National Standard (CNS) A4 specification (21 × 297 mm) 516066 A7 B7 V. Description of invention (20) Voltage -250V). Therefore, when the display mode is switched, the voltage supplied to each first electrode is changed to switch the emitted electron beam. In this way, since the first electrode 11 of this embodiment is divided into 6 points, and has separate driving systems for high-brightness mode and low-brightness and high-definition mode, the above-mentioned area switching display can be performed at the same time. Two display modes are displayed on one screen. In addition, when the electron gun for a color cathode ray tube according to this embodiment is provided, when the cathode ray tube is configured, the arrangement of each lens at the center of the screen of the cathode ray tube and the orbit model diagram of the electron beam passing through the lens are compared with the color cathode ray of the above embodiment. The model picture shown in FIG. 4 of the tube electron gun is the same. That is, between the front lens P L and the main lens M L, the two electron beams SB1 and SB2 cross. Therefore, similar to the above-mentioned embodiments, it is possible to prevent the phenomenon that the spot size becomes larger due to the coma aberration and the electron beam trajectory is changed with the change of the current amount, which can cause the spot position deviation. In addition, in the state of FIG. 4, two electron beams SB1 and SB2 passing through the main lens ML are irradiated at different positions on the fluorescent surface, respectively. Therefore, two signals can be processed by image processing 'to scan two locations simultaneously. In this embodiment, since two electron beams SB1 and SB2 are assigned to a high-brightness mode and a low-brightness and high-definition mode, and two display modes are switched, it is impossible to process two signals by image processing. Therefore, the two electron beams SB1 and SB2 must be irradiated to the same position on the fluorescent surface. Therefore, instead of setting the bias electromagnetic outside the neck of the cathode ray tube, 23- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 516066 A7 B7 Five invention description (21 iron, but A coil (not shown in the figure) is provided at the cathode K terminal, and an external quadrupole lens is formed by the coil, and the upper and lower electron beams SB1 and SB2 are irradiated to the same position on the working surface by the external quadrupole lens. In this way, the irradiation positions are made the same. That is, 'the three electron beams of R, G, and B are focused by the main lens ml, and the six electron beams are concentrated by the main lens ML. In addition,' this The model diagram of the arrangement of the lenses at the corners of the screen of the cathode ray tube of the embodiment and the orbit of the electron beam passing through the lens is also the same as that of FIG. 5. 'It is arranged near the forks or intersections of the two electron beams SB 1, SB2. The structure of the quadrupole lens QL. Therefore, when the two electron beams SB1 and SB2 pass through the quadrupole lens ql, the quadrupole lens QL can be prevented from being affected by the aberration of the quadrupole lens QL. Achieve good light spot characteristics. In this embodiment, as in the above-mentioned embodiments, by intersecting the two electron beams sb 1, SB2 between the front lens PL and the main lens ML, the effect and effect of the coma aberration of the front lens PL can be offset. The effect of the coma aberration of the main lens ML. Furthermore, the orbits of the two electron beams sb 1, SB2 incident on the front lens PL and the main lens ML can be adjusted on the first electrode 11 and the second electrode 12. The coma aberration of the front lens PL and the main lens ML is cancelled to form a structure without coma aberration. Therefore, although the respective electron beam passing holes corresponding to the two electron beams SB1 and SB2 are not in the front lens PL and The center of the main lens ML, but with the electron beam passing hole of the first electrode 11 of the previous single-beam electron gun and the front lens PL and -24- This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) A7 B7 ) 516066 5. Description of the invention (22 The same as the electron gun with the center of the main lens ML, it can form a good spot size. In addition, since the electron beam track does not deviate due to the change in driving voltage, it will not cause the electron beam to reach the fluorescent light. Glossy (fluorescent screen ), The brightness deviation and color deviation of the adjacent phosphors, etc. Furthermore, 'the quadrupole lens QL is arranged at or near the intersection of the two electron beams SB 1, SB2, so the two electron beams SB1, SB2 pass through. Near the center of the quadrupole lens QL, a balanced quadrupole operation is generated at the corner of the screen. Therefore, the corner of the screen can avoid the focus deterioration caused by the size of the spot due to the quadrupole lens QL. Therefore, by The color cathode ray tube provided with the electron gun for this embodiment forms a color cathode ray tube, which can obtain a good image with a small spot size, and can perform high-brightness mode display and low-brightness and high-definition mode display. In addition, since the first electrode 11 is divided into six parts and driven by the G 1 driving method, the emitted electron beam can be switched up and down, and two display modes can be switched by the area distinguished on the day. That is, two display modes can coexist on one screen. In addition, in this embodiment, the first electrode 11 and the second electrode 12 are configured such that the electron beam passing hole at the upper end is enlarged and the electron beam passing hole at the lower end is reduced. It can also be turned upside down to reduce the electron beam passing hole at the upper end and enlarge the electron beam passing hole at the lower end. In the following, the color cathode ray tube electron gun of this embodiment is actually produced. -25- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 public love) 516066 A7 B7 V. Description of the invention (23) and review its characteristics . First, the electron gun for a color cathode ray tube of this embodiment is reviewed. When the electron beam passing aperture of the front lens PL is set to 5 mm, the thickness D of the electrode plate 12 A of the second electrode 12 is changed, and the coma shape is changed. Poor relationship. At this time, as with the electron gun for the color cathode ray tube of FIG. 2 shown in FIG. 6, the coma aberration is zero when the thickness D of the electrode plate 12A of the second electrode 12 is 0.65 mm. In addition, the allowable amount of the coma aberration of this electron gun is also set to 0.05 kV. In addition, the relationship between the amount of current and the spot size of the electron gun for a color cathode ray tube of this embodiment and the previous single-beam electron gun (previous example) is compared. . The results when the current is increased corresponding to the high brightness mode (TV mode) are shown in Fig. 12, and the results when the current is decreased corresponding to the low brightness, high definition mode (PC mode) are shown in Fig. 13. It can be seen from FIG. 12 and FIG. 13 that, regardless of the amount of current, the spot size of the electron gun for a color cathode ray tube of this embodiment is comparable to the spot size of the previous single-beam electron gun. That is, it can be seen that the electron gun for a color cathode ray tube of this embodiment can form a good spot size. In addition, FIG. 14 shows the relationship between the amount of current passing through the electron beam passing hole located vertically below the first electrode 11 and the second electrode 12 in the electron gun for a color cathode ray tube according to this embodiment, and the position of the light spot on the polished surface. However, FIG. 14 shows the position of the light spot in a state where a quadrupole action (external quadrupole lens) is generated without a coil provided outside the neck. -26- This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) 516066 A7 B7 V. Description of the invention (24) According to FIG. 14, it can be seen that the electron gun for the color cathode ray tube of this embodiment changes the current amount, The position of the light spot does not change, and color deviation and brightness deviation do not occur. Furthermore, in a state where the external quadrupole lens is operated, the position of the light spot is 0 regardless of the amount of current, that is, the central axes of the two electron beams are the same. Continuing, FIG. 15 is a perspective view showing an electrode structure of an important part of an extracted electron gun for a color cathode ray tube according to another embodiment of the present invention. Fig. 15 shows the cathode K, the first electrode 11, the second electrode 12, and its electrode plate 12A. In this embodiment, in particular, the first electrode 11 is divided into upper and lower parts to form two electrodes 11U and 11D, which are shared by the electron beams corresponding to the phosphors of the three colors R, G, and B, and are used for the phosphors of the same color. The two electron beams corresponding to the light body are independent of each other. The three electron beams of the first electrode 1 1 U divided into two parts at the upper end pass through the holes to form a large aperture, and the three electron beams of the first electrode 11D at the lower end pass through the holes to form a small aperture. Therefore, the first electrode 11U at the upper end corresponds to the high-brightness mode, and the first electrode 1 1D at the lower end corresponds to the low-brightness and high-definition mode, and two display modes can be displayed. The normal current in the high brightness mode is 1 mA, and the normal current in the low brightness and high fine mode is 0.3 mA. In addition, the electron beam passing holes of the front stage lens PL and the main lens ML of this embodiment are also shared by two electron beams of the same color phosphor, and the two electron beams cross between the front stage lens PL and the main lens ML. Therefore, the quadrupole lens is arranged at or near the intersection of the two electron beams. 0 -27- This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) 516066 A7 B7 V. Description of the invention (25 ) The other structures such as the second electrode 12 are the same as those of the above-mentioned embodiment shown in FIG. 11, and thus repeated descriptions thereof are omitted. In this embodiment, since the first electrodes 11U and 11D are shared by the respective electron beams corresponding to the three-color phosphors R, G, and B, they are driven by a cathode driving method in which a driving signal is supplied to the cathode K. Therefore, specific examples of switching between the two display modes are as follows. When performing high-brightness display, 0V is supplied to the first electrode 11U at the upper end, -250V is supplied to the first electrode 11D at the lower end, and a driving signal is supplied to the cathode K. As a result, the upper electron beam is emitted and irradiates the fluorescent surface, and the lower electron beam is not emitted. For low-brightness and high-definition mode display, -250V is supplied to the upper first electrode 11U, 0V is supplied to the lower first electrode 11D, and a driving signal is supplied to the cathode K. As a result, the lower electron beam is emitted and shines on the fluorescent surface, and the upper electron beam is not emitted. When the display mode is switched, by switching the voltage supplied to each of the first electrodes 11U and 1 1 D, the two electron beams corresponding to the phosphor of the same color are switched between the emitted electron beam and the non-emitted electron beam. In this way, the high-brightness mode display and the low-brightness and high-definition mode display are performed. According to this embodiment described above, similar to the above-mentioned embodiments, a good spot size can be formed, and brightness deviation and color deviation can be avoided. In addition, according to this embodiment, the first electrode 11 is divided into two parts by forming a large aperture through the electron beam passing hole of the upper electrode 11U, and a small aperture is made through the electron beam passing hole of the 'electrode 1 1 D at the lower end. Switch to -28- This paper size applies Chinese National Standard (CNS) A4 specification (210X 297 mm) 516066 A7 B7 V. Description of the invention (26) The voltage of each first electrode 11U and 11D can be switched to high brightness mode Display and low-brightness, high-definition mode display. Therefore, for example, by switching the pressure supplied to each of the first electrodes 11U and 11D, the display screen in the high-brightness mode and the display screen in the low-brightness and high-definition mode can be switched for display. Therefore, by providing the color cathode ray tube with the electron gun for a color cathode ray tube according to this embodiment, a good image with a small spot size can be obtained, and high brightness mode display and low brightness and high definition mode can be displayed. Since the first electrode 11 is divided into two parts and driven by a cathode driving method, the emitted electron beams can be switched up and down, and the display screens of the two display modes can be switched. In addition, the structure of this embodiment can also be inverted upside down to reduce the electron beam passing hole at the upper end and enlarge the electron beam passing hole at the lower end. The present invention is not limited to the embodiments described above, and various other structures can be adopted without departing from the gist of the present invention. Advantageous Effects of Invention According to the present invention, an electron beam passing hole shared by a plurality of sub-beams is formed in the front lens and the main lens. By crossing a plurality of electron beams between the front lens and the main lens, several electrons can be offset. The beam is affected by the front lens (such as coma aberration and the change in the orbit of the electron beam) and by the main lens, which can greatly reduce the effect on the beam spot of the electron beam, forming a good spot size. 0 In addition, by Make several electron beams cross between the front lens and the main lens-29- This paper size applies to China National Standard (CNS) A4 (210 x 297 mm) 516066

Also, it can suppress the deviation of the electron beam orbit caused by the change of the driving voltage, so that it does not cause the brightness deviation and color deviation of the adjacent phosphors and the like that the electron beam hits the fluorescent surface (fluorescent screen). That is, because the cathode ray tube of the present invention can obtain a good image with a small spot size, and is composed of multiple electron guns at the same time, it can be scanned at twice the rate, and the life of the brother is doubled. The signal processing also doubles the brightness when several electron beams overlap. Therefore, the invention can realize a high-definition, high-brightness, double-life cathode, wire tube. That is, the use of this cathode ray tube enables high-definition displays, television receivers, and the like. Furthermore, when a structure in which a quadrupole lens is arranged at or near the intersection of a plurality of electron beams is passed, the plurality of electron beams pass near the center of the quadrupole lens and generate a balanced quadrupole effect at the corners of the screen. In the corner of the screen, it is possible to prevent focus deterioration caused by the spot size caused by the quadrupole lens. In addition, two electron beams are emitted from the same-color phosphor. On the first electrode and the second electrode, one of the two electron beams passes through the hole to form a large aperture, and the other electron beam passes through the hole. With the small-aperture structure, a cathode ray tube can be realized, which can perform various display modes of a high-brightness mode, a low Brahman degree, and a high-definition mode. Brief description of the logic pattern Figure 1 is a side view of an electron gun for a color cathode ray tube according to an embodiment of the present invention. Figure 2 shows the weight of each electrode of the electron gun for the color cathode ray tube of Figure 1. -30- __ This paper size applies to China National Standard (CNS) A4 specifications (210X 297 mm) 516066 A7 B7 V. Description of the invention (28) Main parts Oblique view. FIG. 3 is an enlarged view of a second electrode electrode plate of FIG. 2. Fig. 4 is a model diagram of the arrangement of the lenses of the cathode ray tube of the electron gun for the color cathode ray tube of Fig. 1 at the center of the screen and the orbit of the electron beam passing through the lens. Figure A shows the vertical direction. Figure B shows the horizontal direction. Fig. 5 is a model diagram of the arrangement of the lenses of the cathode ray tube of the electron gun for a color cathode ray tube of Fig. 1 at the corners of the screen and the electron beam passing through the lens. Figure A shows the vertical direction. Figure B shows the horizontal direction. Figure 6 shows the relationship between the electron beam passing through the front lens of the electron gun for a color cathode-ray tube and the coma aberration when the thickness of the electrode plate of the second electrode is changed when the aperture is 5 mm. Fig. 7 shows the results of comparing the relationship between the amount of current and the spot size. FIG. 8 shows the results of comparing the relationship between the amount of current and the spot position. Fig. 9 is a schematic structural view (slanted view) of an important part of an electronic pickup for a color cathode ray tube according to another embodiment of the present invention. Fig. 10 is a schematic structural view (slanted view) of important portions of two guns for a color cathode ray tube according to another embodiment of the present invention. Fig. 11 is a schematic structural view (slanted view) of important parts of two guns for a color cathode ray tube according to another embodiment of the present invention. Comparison of the current amount and light spot size in the Al-Dang mode comparison 516066 A7 B7 V. Results of the invention (29). Figure 1 3 shows the relationship between the current amount and light spot size in the low-brightness and high-definition mode. The results are shown in Fig. M, which shows the relationship between the current amount and the spot position of the electron gun for the color cathode-ray tube shown in Fig. 11. Fig. 15 is a schematic structural diagram of an important part of the electron gun for the color cathode-ray tube according to another embodiment of the present invention (squint view). Figure) Explanation of component symbols_ 10 electron guns for color cathode ray tubes, u first electrode, 12 first electrode, 12A electrode plate, 13 third electrode, 14 fourth electrode, 15 fifth electrode, 16 sixth electrode, 17th seventh electrode, 18th eighth electrode, 20 converging cover, 21 glass beads, 22 stems, 23 resistors, 51th 5-1 electrode, 52th 5-2 electrode, 53th 5_3 electrode, 1 ^, 1 ^ , Cathode, 1 ^ front lens, (^ 4 heavy pole lens, ML main lens-32-This paper size applies to China National Standard (CNS) Α4 specification (210 X 297 mm)

Claims (1)

516066 A8 B8 C8 ___________D8 _ 6. Application scope " 'L An electron gun for cathode ray tubes, which emits several electron beams to the same color phosphor of the cathode ray tube, which is characterized by: the front lens and the main lens Electron beam passing holes common to a plurality of electron beams are formed on the holes, respectively, so that the plurality of electron beams intersect between the front lens and the main lens. 2. The electron gun for a cathode ray tube according to item 1 of the patent application scope, wherein a quadrupole lens is arranged near the intersection or intersection of the above-mentioned electron beams. For example, an electron gun for a cathode ray tube according to the scope of the patent application, wherein two electron beams are emitted to the same-color phosphor, a first electrode opposite to the cathode and a second electrode provided on the fluorescent surface end of the first electrode. The electron beam passage hole through which one of the two electron beams passes is a large aperture, the electron beam passage hole through which the other of the two electron beams passes is a small hole, and one of the electron beams and the other electron beam are switched with each other Shoot out. 4. The electron gun for a cathode ray tube according to item 3 of the application, wherein the first electrode is divided so that the emitted electron beams are independent. 5. If the electron gun for a cathode ray tube according to item 3 of the patent application, wherein the first electrode is divided in two ways in which one of the two electron beams and the other are independent of each other. 6. The electron gun for cathode ray tubes according to item 2 of the patent application, wherein two electron beams are emitted to the same-color phosphor, a first electrode opposite to the cathode and a second electrode provided on the fluorescent surface end of the first electrode. In the electrode, the electron beam passing hole through which one of the two electron beams passes is a large aperture, -33- R. Patent Application Fan Yuan ^ The electron beam passing hole of the two electron beams is a small hole. Eight electron beams and the other electron beam are switched and emitted. The electron gun for a cathode ray tube, such as the scope of application for patent No. 6, wherein the above-mentioned electrode is divided in such a manner that the emitted electron beams are independent: For example, an electron gun for a cathode ray tube according to item 6 of the patent claim, in which the aforementioned -electrode is divided into two in a manner in which one of the two electron beams and the other two are independent of each other. The total type of cathode ray f is provided with an electron gun which emits several electron beams to the phosphors of the same color of the cathode ray tube, and is characterized in that an electron beam common to the above-mentioned electron beams is formed on the front lens and the main lens respectively Through the hole; the aforementioned electron beams are crossed between the front lens and the main lens. 10. The cathode ray tube according to item 9 of the scope of patent application, wherein a quadrupole lens is arranged near or at the intersection of the above-mentioned electron beams of the above-mentioned electron gun. 11. The cathode ray tube according to item 9 of the scope of patent application, wherein two electron beams are emitted to the same-color phosphor, a first electrode opposite to the cathode and a second electrode disposed on the fluorescent surface end of the first electrode In the electrode, the electron beam passing hole in which one of the two electron beams passes has a large aperture, and the electron beam passing hole in which the other of the two electron beams passes has a small aperture, in which one electron beam and the other electron beam switch with each other Shoot out. '12. The cathode ray tube according to item 1 i of the scope of patent application, wherein the above-mentioned electrode system is sub-contracted in such a way that the emitted electron beams are independent. -34- This paper size applies to China National Standard (CNS) A4 specification (210X297 male ----, 16066) Among them, the first and the other cathode ray tubes which are independent from each other, such as the scope of application for patent 1.1, are split in such a way that one of the two electron beams is mutually separated. 14. The cathode ray tube as described in item 10 of the scope of patent application, wherein two electron beams are emitted to the above-mentioned room-color phosphor, and the first electrode opposite to the cathode is placed on the fluorescent surface of the first electrode In the second electrode at the end, the upper one: the electron beam passing hole of one of the two waves of electron beams has a large aperture, the second electron beam passing through the other two electron beams has a small aperture, and one of the electron beams and The other electron beams are switched on and off. 15. · For a cathode ray tube according to item i 4 of the scope of patent application, wherein the first electrode is subdivided in such a way that the emitted electron beams are independent ^ 16. · For cathode ray tube according to item 14 of the patent scope, Wherein, the first order electrode is divided into two parts in such a way that one of the two electron beams and the other are separated from each other. -35- line