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Cathode rays tube device

A technology for cathode ray tubes and tube shafts, applied in the direction of cathode ray tubes/electron beam tubes, cathode ray/electron beam tube shells/containers, electrode devices and related components, which can solve problems such as reducing deflection power

Inactive Publication Date: 2004-01-14
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, it has not been possible to obtain sufficient vacuum tube strength in the past, especially for a panel with a flat surface with an outer curvature radius that is more than twice the effective diameter of the phosphor screen and a vacuum tube shell that is compatible with both enough to reduce the deflection power

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment 1

[0081] according to Figure 1 to Figure 4 , to illustrate Embodiment 1 of the present invention. it's here, Figure 4 will be figure 1 A sketch of the upper half of the section along the tube axis Z when it is cut on the diagonal axis D, and the deflection system is added in the figure.

[0082] The display part of the cathode ray tube 10 has a substantially rectangular glass panel part 12, a funnel-shaped glass funnel part 13 connected to the panel part 12, and a deflection yoke part 14 connected to the small diameter part of the funnel part 13. And a tube case 16 configured by arranging a cylindrical glass-made neck portion 15 connected to the deflection coil portion 14 along the tube axis Z. A phosphor screen 17 is provided inside the display portion of the panel portion 12 . In addition, an electron gun 18 is arranged inside the neck 15 . And, from the deflection yoke part 14 to the outside of the neck 15, a deflection yoke 20 is installed, and the horizontal and ver...

Embodiment 2

[0093] Likewise with regard to Example 2 described in Table 1 above, the planar shape ratio of the fluorescent screen is: M:N=4:3; and

[0094] DA=29.9mm, LA=26.7mm, SA=22.3mm and get:

[0095] (LA+SA) / (2DA)=0.82 Therefore, for a cathode ray tube having a conical deflection yoke portion, the deflection power can be reduced by about 22%.

[0096] In addition, the curvature radii of the outside of the deflection coil part on the cross section of the deflection reference position are respectively:

[0097] Rh = 101 mm, Rv = 439 mm, Rd = 10.2 mm and the maximum vacuum stress of the deflection yoke portion is 1000 psi, so there is no problem even in terms of strength. (Example 3)

Embodiment 3

[0098] Likewise with respect to Example 3 described in Table 1 above, the planar shape ratio of the fluorescent screen is: M:N=4:3; and

[0099] DA=30.2mm, LA=27.1mm, SA=22.5mm and get:

[0100] (LA+SA) / (2DA)=0.82 Therefore, for a cathode ray tube having a conical deflection yoke portion, the deflection power can be reduced by about 20%.

[0101] In addition, the curvature radii of the outside of the deflection coil part on the cross section of the deflection reference position are respectively:

[0102] Rh = 75 mm, Rv = 174 mm, Rd = 8.7 mm and the maximum vacuum stress of the deflection yoke portion is 920 psi, so there is no problem even in terms of strength. (Example 4)

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PUM

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Abstract

The present invention relates to a cathode ray tube that can ensure the pressure resistant strength and can effectively reduce the deflection power even if the deflection coil of a case is pyramided. A crosscut tube is formed between a screen and the neck part, and is shaped like a delfection coil 14; the outside part is provided with a deflection system; and the cross section of the axle of the crosscut tube is made in a non-circular shape like a cylinder. When the plane shape ratio of the screen is M to N, the outer diameter of the vertical axle of the screen of the cross section is SA, the outer diameter of the horizontal axle is LA and the outer diameter of the largest deflection coil is DA, the tube can meet the following formula: (M + N) / (2 (M <2>+ N <2>) <1 / 2>) less than (SA + LA) / (2DA) equal to or less than 0.86.

Description

technical field [0001] The invention relates to a cathode ray tube device such as a color cathode ray tube, in particular to a cathode ray tube device which can effectively reduce the deflection power and ensure the air pressure resistance of the vacuum tube shell. Background technique [0002] As an example of a cathode ray tube, the Figure 8 A color picture tube is shown in . In this color picture tube, the display portion 101 has a panel 102 made of substantially rectangular glass, a funnel-shaped glass funnel 103 connected to the panel 102, and a cylindrical glass tube connected to the funnel 103. The manufactured neck 104 constitutes the vacuum envelope. Also, a deflection yoke 109 is installed from the neck 104 to the side of the funnel 103, and the funnel 103 has a small-diameter portion, that is, a deflection yoke portion 110, from the connection portion with the neck 104 to the position where the deflection yoke 109 is installed. Inside the panel 102, there is a ...

Claims

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Application Information

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IPC IPC(8): H01J29/87H01J29/76H01J29/82H01J29/86H01J31/20
CPCH01J29/861H01J29/826B60Q1/52B60Q1/54B60Y2400/303
Inventor 佐野雄一横田昌广
Owner KK TOSHIBA