JP3053842B2 - Color picture tube equipment - Google Patents

Description

The present invention relates to a color picture tube apparatus, and more particularly to a color picture tube apparatus which dynamically emits three electron beams, which are emitted from an electron gun and pass in the same plane, on the same plane. The present invention relates to a high-resolution color picture tube device of a focusing type.

(Prior Art) Generally, as shown in FIG. 8, a color picture tube device has an envelope composed of a panel (1) and a funnel (2) integrally joined to the panel (1). On the inner surface of the panel (1), a phosphor screen (3) composed of a three-color phosphor layer in the form of dots or stripes emitting blue, green, and red light is formed, and opposed to the phosphor screen (3), A shadow mask (4) having a large number of electron beam passage holes formed therein is mounted therein. Also, three electron beams (6B) in the neck (5) of the funnel (2),
An electron gun (7) for emitting (6G) and (6R) is provided. The three electron beams (6B), (6G), and (6R) emitted from the electron gun (7) are deflected by a magnetic field generated by a deflecting device (8) mounted outside the funnel (2). The phosphor screen (3) is formed so as to display a color image by scanning horizontally and vertically.

In such a color picture tube, in particular, an electron gun (7)
Are arranged in a line consisting of a center beam and a pair of side beams passing through the same horizontal plane (6B), (6
G) and (6R), and the magnetic field generated by the deflection device (8) is an asymmetric magnetic field consisting of a pink cushion type horizontal deflection magnetic field and a barrel type vertical deflection magnetic field. 3 electron beams (6B),
Self-convergence type in-line color picture tubes for self-concentrating (6G) and (6R) are widely used.

Usually, the electron gun (7) controls an electron emission from the cathode and accelerates the electron beam to form three electron beams (6B), (6G) and (6R), and an electron beam forming unit (GE). (GE) three electron beams (6B), (6G),
The main electron lens (M) consisting of a plurality of grids (electrodes) that focus and concentrate (6R) on the phosphor screen (3)
L).

In order to improve the image quality on the phosphor screen (3) obtained by landing the three electron beams (6B), (6G), and (6R) emitted from the electron gun (7), The three electron beams (6B), (6G), and (6R) are properly focused, and the focused three electron beams (6B),
It is necessary to correctly concentrate (6G) and (6R) over the entire phosphor screen (3). These three electron beams (6B), (6
Focusing and concentration on G) and (6R) are the same in the self-convergence type in-line type color picture tube.

Concerning the concentration of the three electron beams (6B), (6G) and (6R), U.S. Pat. No. 2,957,106 shows a means for preliminarily tilting and concentrating the three electron beams emitted from the electron gun. I have. U.S. Pat. No. 3,772,554 discloses that, out of three electron beam passage holes of a grid constituting a main electron lens portion, a pair of side beam passage holes is formed in a side beam of a grid adjacent to an electron beam forming portion side. Means for concentrating by eccentricity slightly outside the through-hole are shown.

However, even when the electron gun is configured as described above, the following problems have been newly highlighted as the color picture tube becomes larger and higher in quality.

(B) Beam spot diameter on the phosphor screen (b) Distortion of the beam spot around the phosphor screen due to the deflection magnetic field (c) Concentration of three electron beams over the entire screen That is, for example, if the tube becomes large, The distance from the electron gun to the phosphor screen increases, the electron optical magnification of the electron lens increases, the beam spot diameter on the phosphor screen increases, and the resolution deteriorates. In order to reduce the beam spot diameter on the phosphor screen, the lens performance of the electron gun must be improved. In order to improve the concentration over the entire screen, 3
It is preferable to reduce the interval between the electron beams.

On the other hand, the magnetic field of the deflection device with respect to the electron beam is distorted by a slight pincushion-type magnetic field component or a barrel-type magnetic field component even if the magnetic field is nearly uniform. For example, an electron beam (6) is generated by a pincushion type magnetic field (10) component shown in FIG.
The force shown by the arrow (11) acts on B), (6G), and (6R). The force acting on the electron beams (6B), (6G), and (6R) increases as the diameter of the tube becomes larger or the angle of deflection becomes wider. In particular, the vertical direction (Y-axis direction) becomes overfocused, and As shown in Fig. 10, the beam spots (12B), (12G), and (12R) on the phosphor screen are aligned with the high-brightness core (13) whose major axis is in the horizontal direction (Χ-axis direction). A halo (14) occurs in the vertical direction.

Conventionally, as a means for solving the beam spot distortion based on such a deflection aberration, TV technical report 88 / VOL.36 P41
~ 55, and IEICE Technical Report VOL.86 NO.367 P5 ~ 12
A method is shown in which a polar lens is used to diverge the electron beam in the vertical direction according to the amount of deflection. But the second
As shown in FIG. 11, the method using the quadrupole lens (15) is based on the electron beam diameter in the vertical direction on the deflection center plane (16).
Since Dd is increased, the lens is more and more subject to deflection aberration. Therefore, in order to obtain a desired convergence state, it is necessary to perform dynamic focus that greatly fluctuates the electron lens, and the voltage difference between the dynamic focus voltages is large, which imposes a heavy burden on the circuit.

(Problems to be Solved by the Invention) As described above, an electron gun emits three electron beams arranged in a line composed of a center beam and a pair of side beams passing on the same horizontal plane, and the three electron beams are generated by a deflection device. 2. Description of the Related Art A self-convergence type in-line type color picture tube device in which three electron beams are self-concentrated by being deflected by a non-uniform magnetic field including a pincushion type horizontal deflection magnetic field and a barrel type vertical deflection magnetic field is widely used. However, in this self-convergence type in-line type color picture tube device, the beam spot is distorted due to the deflection aberration based on the non-uniform magnetic field, and the distortion of the beam spot causes the tube to become larger and higher in quality. This poses a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a color picture tube apparatus capable of easily reducing distortion of a beam spot due to deflection aberration and thereby displaying a good image over the entire screen. It is intended to constitute.

[Constitution of the Invention] (Means for Solving the Problems) A plurality of cathodes for emitting three electron beams arranged in a line passing on the same plane and a plurality of electrodes for focusing and concentrating the three electron beams. A color picture tube apparatus for horizontally and vertically scanning a phosphor screen by deflecting three electron beams emitted from the electron gun by a magnetic field generated by a deflecting device. The lens has at least first and second electronic lenses, and the first and second electronic lenses have the first
The electron lens has a first electrode whose potential fluctuates in synchronization with the deflection of the deflection device, and the second electron lens has a second electrode whose potential fluctuates simultaneously with the first electrode in synchronization with the deflection of the deflection device. The electron beam is deflected from the center of the screen to the periphery by the magnetic field generated by the deflecting device, so that the diameter of the electron beam in the vertical direction on the deflection center plane becomes smaller.

(Operation) As described above, among the plurality of electron lenses for converging three electron beams arranged in a line passing on the same plane, the strength of the first electrode and the strength of the second electron lens that change the strength of the first lens are determined. When the potential of the second electrode to be changed is simultaneously changed in synchronization with the deflection of the deflecting device, the electron beam is deflected from the center of the screen to the periphery by the magnetic field generated by the deflecting device. In this case, the diameter of the electron beam in the vertical direction becomes smaller, and the strengths of the first lens and the second electron lens change at the same time, making it possible to perform highly sensitive dynamic focus adjustment and lower the dynamic focus voltage. it can.

Hereinafter, the present invention will be described based on embodiments with reference to the drawings.

FIG. 1 shows a color picture tube device according to one embodiment. This color picture tube device has an envelope composed of a panel (1) and a funnel (2) integrally joined to the panel (1), and emits blue, green and red light on the inner surface of the panel (1). A phosphor screen (3) composed of a three-color phosphor layer is formed, and a shadow mask (4) having a number of electron beam passage holes formed inside thereof is mounted opposite to the phosphor screen (3). Have been. Further, an internal conductive film (21) is formed from the inner surface of the cone portion (20) of the funnel (2) to the inner surface of the adjacent portion of the neck (5). Further, in the neck (5) of the funnel (2), a three-electron beam arranged in a line composed of a center beam (6G) and a pair of side beams (6B) and (6R) passing on the same horizontal plane (Χ-Z plane). An in-line type electron gun (22) which emits (6B), (6G), and (6R), which will be described later, is provided. The electron gun (22) is attached to a stem pin (24) that has one end airtightly penetrating a stem (23) sealing the end of the neck (5), and the other end is attached to the electron gun (22). ) Is supported by a plurality of valve spacers (25) that are attached to the distal end of the substrate and pressed against the internal conductive film (21).

Further, outside the boundary between the neck (5) of the funnel (2) and the cone (20), the three electron beams (6B),
Pincushion type horizontal deflection magnetic field that deflects (6G) and (6R) horizontally (水平 -axis direction) and vertical direction (Y-axis direction)
A self-convergence type deflecting device (8) for generating a barrel-type vertical deflection magnetic field for deflecting the light is mounted, and a magnet (26) for adjusting color purity and convergence is provided at the rear end of the deflecting device (8). It is installed.

The above-mentioned electron gun (22) has one end at its stem (23) side.
Cathodes (KB), (KG), and (KR) are arranged in a row in the horizontal direction, and three heaters (H) are separately arranged for each of the cathodes (KB), (KG), and (KR). It is structured to be heated by. And this cathode (KB), (K
G), (KR), first to tenth grids (G1) to (G10) having an integral structure are sequentially arranged in the direction of the phosphor screen (3), and the heaters (H), cathodes (KB), and (KG) are arranged. ,
(KR) and the first to tenth grids (G1) to (G10) are formed in a structure integrally fixed by a pair of insulating supports (28).

The first and second grids (G1) and (G2) are composed of plate-like electrodes, and the three cathodes (K
B), (KG) and (KR) correspond to three relatively small circular electron beam passage holes, and the third grid (G1) has two holes.
The second grid (G2) side is formed with three circular electron beam passage holes larger in diameter than the second grid (G2) electron beam passage holes. ing. And the cathodes (KB), (KG),
The portion from (KR) to the third grid (G3) controls and accelerates the electron emission from the cathodes (KB), (KG) and (KR) to accelerate the three electron beams (6B), (6G), ( 6R) to form an electron beam forming portion (GE).

The fourth grid (G4) has a butting structure of two cup-shaped electrodes, and the fifth grid (G5) has a butting structure of four cup-shaped electrodes.
As shown in FIG. 2, the first grid (G1) and the fourth grid (G1) of the fourth grid (G4) and the fourth grid (G4) of the fourth grid (G4) and the fifth grid (G5) , (G2), etc., corresponding to the three cathodes (KB), (KG), (KR), three relatively large circular electron beam passage holes (3
0) is formed.

The sixth to eighth grids (G6) to (G8) are composed of a ninth grid (G9) from the butted structure of two cup-shaped electrodes.
Consists of a butt structure of three cup-shaped electrodes, and in particular, the cup-shaped electrode (31) on the tip side of the ninth grid (G9).
Consists of a cup-shaped electrode that is larger in diameter than the other two cup-shaped electrodes. The sixth grid (G6) side of the fifth grid (G5), the sixth grid (G6), and the seventh grid (G
7), on the eighth grid (G8) side of the eighth grid (G8) and the ninth grid (G9), as shown in FIG. 3, elongated portions are formed in the horizontal direction and large-diameter portions are formed at both ends thereof. A pair of projections projecting in the direction of the electron gun axis (coinciding with the tube axis (Z axis)) along both ends in the vertical direction are formed with one horizontally elongated electron beam passage hole (31) common to the three electron beams. A part (32) is formed. In particular, the inside of the large-diameter cup electrode (31) constituting the tip of the ninth grid (G9) is
As shown in the figure, three non-circular electron beam passage holes (33B), (3
3G) and (33R), and a pair of projecting portions (34) projecting in the axial direction of the electron gun along both vertical edges of the pair of electron beam passage holes (33B) and (33R) on both sides in the horizontal direction. The electric field control plate (35) on which () is formed is arranged. A pair of electron beam passage holes (33B) and (33R) on both sides in the horizontal direction of the electric field control plate (35) are located at the center electron beam passage hole (33).
G) It is formed larger.

In addition, grid 10 (G10) is grid 9 (G9)
And a cylindrical electrode surrounding the tip of the ninth grid (G9) and substantially the three electron beams (7B), (7G), (7R) between the tip of the ninth grid (G9) and the tenth grid (G10). ) To form a common large aperture lens.

Specifically, the electron gun (22) is formed in the following dimensions.

Cathode spacing Sg = 4.92mm Electron beam passage hole diameters G1φ, G2φ of the first and second grids
= 0.62 mm Electron beam passage hole diameter G3φ, G4φ, G51a on the fourth grid side of the third, fourth and fifth grids = 4.52 mm On the sixth grid side of the fifth grid and the sixth, seventh, eighth and ninth grids Length / width of electron beam passage holes in grid = 4.
52 / 15.0mm Longitudinal / horizontal diameter of the large part on both sides of the electron beam passage holes on the sixth grid side of the fifth grid and the sixth, seventh, eighth and ninth grids = 8.0 / 2.5mm ninth grid Electron beam passage hole diameter G9Tφ = 25.0mm at the tip of the 10th grid Electron beam passage hole diameter G10φ = 28.0mm Third grid length = 1.1mm Fourth grid length = 4.4mm Fifth grid length = 9.2mm 6 grid length = 8.8mm 7th grid length = 21.0mm 8th grid length = 4.4mm 9th grid length = 37.0mm 10th grid length = 40.0mm First and second grid Interval G1 / G2 = 0.62mm Second and third grid intervals G2 / G3 = 1.2mm Third and fourth grid intervals G3 / G4 = 0.6mm The voltage applied to each electrode of this electron gun (22) is
For electrodes other than the 10th grid (G10), the voltage is applied via the stem pin (24). For the 10th grid (G10), the anode terminal (not shown) provided on the cone (20), the internal conductive film (21) and applied via a valve spacer (25) pressed against the internal conductive film (21). The voltage applied to each electrode is, for example, the cathode (K
B), (KG), and (KR) are set to a cutoff voltage of about 150 V, a video signal is added thereto, the first grid (G1) is set to the ground potential, the second grid (G2) is set to 500 V to 1 kV, ,
Fifth, seventh and ninth grids (G3), (G5), (G7),
(G9) 5-10kV, 4th grid (G4) 500-1kV, 6th grid (G6) 0-3kV, 8th grid (G8) 15
An anode high voltage of 2020 kV and 25-30 kV is applied to the tenth grid (G10). By applying such a voltage,
As shown in FIG. 5, each cathode (KB), (KG), (K
R) emits electrons in accordance with the modulation signal, and the emitted electron beams are converted into cathodes (KB), (KG),
(KR) and the first and second grids (G1) and (G2) intersect with the central axes (ZB), (ZG) and (ZR) passing through the electron beam passage holes of each grid (G1) and (G2). As a result, a first crossover (CO1) is formed, and a prefocus lens (P) is formed by second and third grids (G2) and (G3).
L), the light beam is slightly focused to form a virtual crossover, and enters the third grid (G3) while diverging.
The three electron beams (6
B), (6G), (6R) are the third to tenth grids (G3)
(G10) focuses and concentrates on the main electron lens portion formed by (G10) to converge and concentrate on the phosphor screen (3). The three electron beams (6B), (6G), and (6R) emitted from the electron gun (22) are deflected by the horizontal and vertical deflection magnetic fields generated by the deflection device, and move the phosphor screen (3) horizontally. By performing vertical scanning, an image is displayed on the phosphor screen (3).

Incidentally, (16) is the deflection center plane. FIG. 5 (c) shows an optical model of the microwave oven with respect to the center beam (6G).
Similar optical models are formed for B) and (6R).

When the three electron beams (6B), (6G), and (6R) are deflected to the periphery of the phosphor screen (3), they undergo deflection aberration. In order to eliminate this deflection aberration, in the electron gun (22) of this example, when the three electron beams (6B), (6G), and (6R) are deflected to the peripheral portion of the phosphor screen (3), the main electron lens portion The state is changing.

That is, three electron beams (6B) which form the first crossover (CO1) and enter the third grid (G3),
(6G), (6R) are the third and fourth grids (G3), (G4)
And 3 on the fourth grid (G4) side of the fifth grid (G5)
Three relatively weak uni-potential electron lenses (ELS) formed by two circular electron beam passage holes,
It is slightly focused both horizontally and vertically. Next, the sixth grid (G6) side of the fifth grid (G5) and the sixth grid (G5)
7th grid (G6), 3 electron beams (G7) (6B),
(6G), (6R) The electron lens (VL1) (first electron lens) formed by the common horizontally elongated electron beam passage hole,
It is focused strongly mainly in the vertical direction. As a result, the three electron beams (6B), (6G), and (6R) vertically
In the middle of the grid (G7), each center axis (ZB), (ZG),
Intersects with (ZR) to form a second crossover (CO2), and then enters the eighth grid (G8) while diverging. An electron lens (VL2) formed by a horizontally elongated electron beam passage hole on the eighth grid (G8) side of the seventh and eighth grids (G7), (G8) and the ninth grid (G9).
(Second electron lens), each of which is slightly focused, and then has a large diameter common to three electron beams (6B), (6G), and (6R) formed by ninth and tenth grids (G9) and (G10). The electron beams (LEL) are focused in the horizontal and vertical directions, respectively, and the pair of side beams is subjected to a concentrated action to form a small beam spot (sp) at the center of the phosphor screen (3).

When the three electron beams (6B), (6G), and (6R) are deflected by the self-convergence type deflecting device, as described above, the vertical direction is particularly in an overfocus state. Therefore, the potential of the sixth grid (G6) (first electrode) constituting the first electron lens (VL1) is raised, and at the same time, the eighth grid (G) constituting the second electron lens (VL2) is increased.
8) When dynamic focus is performed to lower the potential of the (second electrode), the fifth, sixth, and seventh grids (G
5), the first electron lens (V) formed between (G6) and (G7)
L1) weakens the vertical focusing power, causing the second vertical
Crossover (CO2) moves to the position (CO2D) on the phosphor screen (3) side. On the other hand, while diverging from this second crossover (CO2D), the eighth grid (G8)
The three electron beams (6B), (6G), and (6R) incident on the second electron lens (VL2) formed between the seventh, eighth, and ninth grids (G7), (G8), and (G9). ), But the focusing power of the second electron lens (VL2) is weakened, so that the vertical object point position as viewed from the common large-aperture electron lens (LEL) becomes shorter, and the three electron beam (6B) , (6G),
(6R) becomes incident on the common large aperture electron lens (LEL) in a strongly divergent state. Therefore, the three electron beams (6B), (6) focused on the phosphor screen (3)
G) and (6R) are in the underfocus state, and cancel the overfocus state by the deflection yoke.

Accordingly, in synchronization with the deflection current of the deflection device shown in (37) in FIG. 6 (a), the reference voltage is dynamically changed in the sixth grid (G6) as shown in (b) and (38) in (b). At the same time as applying the dynamic voltage on which the voltage (dynamic change VP-P) to be applied is superimposed, the reference voltage is applied to the sixth grid (G6) as shown in (39) in FIG. By applying a dynamic voltage that is the same as the dynamically changing voltage applied to the pixel and the dynamic change amount VP-P is superimposed on the phase-reversed voltage, the electron beam diameter in the vertical direction is reduced, and the A beam spot can be formed.

For an example of a 32 inch 110 degree deflecting color picture tube device, the voltage applied to each grid of the electron gun is shown,
The voltage for properly focusing so as to form a small beam spot in the center of the phosphor screen is about the third grid, the fifth grid, the ninth grid, about 8 kV, the fourth grid about 1 kV, the sixth grid about 3 kV, and the eighth grid. The grid is about 15 kV, the 10th grid is about 25 kV, and the voltage for properly focusing so as to form a small beam spot at the horizontal axis end of the phosphor screen as in the center is about 3.4 kV in the sixth grid. , Eighth
It is about 14.6 kV on the grid.

In other words, the conventional dynamic focus type color picture tube device needs a dynamic voltage of about 1 kV, but in the color picture tube device of this example, the sixth grid is used.
A sufficient effect can be obtained with a dynamic focus voltage of 3 kV to 3.4 kV and a dynamic focus voltage of 14.6 to 15 kV in the eighth grid, that is, an extremely low dynamic voltage with a dynamic change amount VP-P of about 400 V, and reduces the load on the driving circuit of the color picture tube device. Can be reduced.

In the above-described embodiment, a voltage higher than that of the seventh and ninth grids is applied to the eighth grid, and the seventh, eighth, and ninth grids are used to apply a unipotential type second electron lens (VL
Although the case of forming 2) has been described, a voltage lower than that of the seventh and ninth grids may be applied to the eighth grid to form a unipotential electron lens. In this case, the voltage applied to the eighth grid is synchronized with the deflection current shown in FIG. 6A as shown by (40) in FIG. 7, and as shown in FIG. The dynamic voltage applied to the sixth grid may have the same phase as that of the dynamic voltage, which makes it very easy to use.

Further, in the above-described embodiment, the case where the vertical overfocus state of the electron beam, which is particularly problematic, is corrected as the deflection aberration based on the deflection yoke,
In general, the horizontal deflection aberration of the electron beam is very small and does not usually cause a problem. However, if necessary, the horizontal deflection aberration can be similarly corrected.

In the above embodiment, the large-diameter electron lens common to the three electron beams is formed by the ninth and tenth grids.
The present invention can be applied to a color picture tube device having an electron gun constituted by various electron lenses regardless of this.

[Effects of the Invention] With respect to an electron gun having a plurality of electron lenses for focusing and concentrating three electron beams arranged in a line passing on the same plane, at least a first electron gun forming the plurality of electron lenses.
Of the second electron lenses, the first forming the first electron lens
The potential of the electrode is changed in synchronization with the deflection of the deflecting device, and at the same time, the potential of the second electrode forming the second electron lens is changed in synchronization with the deflection of the parallel device. When the dynamic focus adjustment is made to change simultaneously, extremely sensitive dynamic focus adjustment is possible, the deflection aberration based on the deflection magnetic field of the deflection device can be corrected very easily with a low dynamic focus voltage, and the beam It is possible to configure a color picture tube device that displays a good image by reducing the spot. Further, since the dynamic focus voltage can be reduced, the load on the drive circuit can be reduced, and its economical design becomes possible.

[Brief description of the drawings]

1 to 7 are explanatory views of an embodiment of the present invention.
FIGS. 2A and 2B are a configuration diagram of a color picture tube device and an electron gun thereof according to an embodiment, respectively, and FIGS. 2 and 3 are electron beams of a grid constituting the electron gun, respectively. FIG. 4 is a view showing the configuration of the electric field control plate, and FIGS. 5 (a) to 5 (c) are views for explaining the operation of the electron gun. (B) and (c) show the configuration of the electron gun, respectively (a)
Operation explanatory diagram of the electron gun shown in comparison with the configuration diagram of the electron gun of
FIGS. 6 (a) to 6 (c) are diagrams for explaining dynamic focus adjustment. FIG. 6 (a) is a deflection current waveform diagram of a deflection device, and FIGS. FIG. 7 is a waveform diagram of a dynamic voltage applied to a grid according to another embodiment, FIG. 8 is a configuration diagram of a conventional color picture tube device, and FIG. 9 is a pincushion type deflection device thereof. FIG. 10 is a view for explaining the effect of an electric field on an electron beam, FIG. 10 is a view showing distortion of a beam spot due to deflection aberration, and FIGS. 11 (a) and (b) are views of an electron gun provided with a quadrupole lens, respectively. It is a figure showing an operation. 3 ... Phosphor screen, 6B, 6R ... A pair of side beams, 6G ... Center beam, 8 ... Deflecting device, 22 ... Electron gun, G1 ... First grid, G2 ... Second grid, G3 ... 3rd grid, G4 ... 4th grid, G5 ... 5th grid, G6 ... 6th grid, G7 ... 7th grid, G8 ... 8th grid, G9 ... 9th grid, G10 ... ... 10th grid, H ... heater, KB, KG, KR ... cathode, GE ... electron beam forming unit, ML ... main electron lens unit, CO1 ... first crossover, CO2 ... second Crossover, PL ... Prefocus lens, EL ... Unipotential lens, VL1 ... First electronic lens, VL2 ... Second electronic lens, LEL ... Main electronic lens.

Claims (1)

(57) [Claims] An electron gun having a cathode for emitting three electron beams arranged in a line passing on the same plane and a plurality of electron lenses comprising a plurality of electrodes for focusing and concentrating the three electron beams. In a color picture tube device for deflecting three electron beams emitted from the electron gun by a magnetic field generated by a deflecting device to horizontally and vertically scan a phosphor screen, the plurality of electron lenses are at least first and second electrons. A first electrode having a first electrode whose potential fluctuates in synchronization with the deflection of the deflecting device; and a second electron lens having a deflection of the deflecting device. A second electrode whose potential fluctuates simultaneously with the first electrode in synchronization with the first electrode. The electron beam is deflected from the center to the periphery of the screen by the magnetic field generated by the deflecting device. A color receiver tube device characterized in that the electron beam diameter in the vertical direction at the center plane is reduced.