Deflection yoke device
A technology of deflection coils and coils, applied in the direction of electrode devices and related components, cathode ray tubes/electron beam tubes, discharge tubes, etc., can solve problems such as complex circuit configuration, high price, high withstand voltage, and difficulty in convergence adjustment, and achieve suppression Effect of induced voltage and correct convergence correction
Inactive Publication Date: 2004-02-25
SANYO ELECTRIC CO LTD +1
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Problems solved by technology
[0012] In this way, in Figure 7 In the shown deflection yoke device 10, since an induced voltage is generated on the horizontal convergence coil 51 of the convergence coil unit 5, there is a problem that convergence adjustment by the horizontal convergence coil 51 is difficult.
As a method to solve this problem, although it is conceivable to dispose a cancellation circuit for canceling the changing magnetic field from the main coil portion 4, not only the circuit configuration to be connected to the deflection yoke device 10 is complicated, but also there is a need for expensive configuration of the cancellation circuit. Problems with expensive high voltage circuit components
Method used
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Embodiment Construction
[0030] Embodiments of implementing the present invention in an image display of a projection type color television apparatus will be described in detail below with reference to the accompanying drawings.
[0031] As shown in Figure 2, the deflection coil device 1 according to the present invention is installed on the picture tube 2 across the funnel portion 21 and the tube neck 22 of the picture tube 2, including the electron beam that should deflect the electron beam emitted from the electron gun 3. The main coil part 4 and the convergence coil part 5 which should adjust the convergence of the electron beam. Close to the main coil unit 4 , the convergence coil unit 5 is disposed behind the main coil unit 4 . In addition, in FIG. 2, the upper half of the deflection yoke device 1 is shown by a partial cross-sectional side view, and the lower half of the deflection yoke device 1 is shown by a vertical cross-sectional view.
[0032] The main coil unit 4 is composed of the main c...
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The invention provides a deflection yoke device comprising a main yoke portion 4 for deflecting an electron beam emitted by an electron gun, and a convergence yoke portion 5 for adjusting the convergence of the electron beam. The convergence yoke portion 5 comprises an annular convergence core 53, a convergence horizontal coil 51 wound around both of left and right two regions of the core 53 which intersect a horizontal axis, and a convergence vertical coil 52 wound around both of upper and lower two regions of the core 53 which intersect a vertical axis. Short-circuited coils 54, 54 are provided around the respective left and right two regions of the core 53.
Description
technical field [0001] The present invention relates to a deflection yoke device provided in a picture tube in an image display of color television equipment and the like. Background technique [0002] In the projection type color television equipment that projects images on the front screen, three image displays for R (red), G (green) and B (blue) are equipped, and these image displays face the front screen. screen arrangement. [0003] Each image display consists of Image 6 A picture tube 2 and a deflection yoke arrangement 10 are shown. The display tube 2 integrally includes a cone portion 21, a tube neck portion 22 protruding from the small diameter side of the cone portion 21, and a panel 23 formed on a large diameter side of the cone portion 21, and is built into the tube neck portion 22. There are electron guns3. The deflection yoke unit 10 is disposed across the funnel portion 21 and the neck portion 22 of the picture tube 2 . In the drawings referred to in the ...
Claims
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IPC IPC(8): H01J29/76H01J29/70
CPCH01J29/705
Inventor 宫崎雅彦
Owner SANYO ELECTRIC CO LTD