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US 2004/0090165 A1Published application
Electron gun,cathode-ray tube and projector
OwnerHirokazu Takumainventor
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OwnerHirokazu Takumainventor
Estimating the term…
In a cathode ray tube equipped with an electron gun for radiating multiple electron beams each scanning different positions, it is made possible to modulate velocities of the electron beams individually. There are provided a first velocity modulation coil (9) for generating a magnetic field H1 that exerts force F1 on the first electron beam I1 and a second velocity modulation coil (10) for generating a magnetic field H2 that exerts force F2 different from the force F1 on the second electron beam I2. In the cathode ray tube, by modulating the velocities of the electron beams I1 and I2 independently of each other, it is possible to improve sharpness without deteriorating a grade of an image. Further, in a projector equipped with the cathode ray tube, it is possible to improve luminance and also improve sharpness without deteriorating the image grade.
An electron gun for radiating multiple electron beams, said electron gun comprising a velocity modulation electrode for generating an electric field that exerts force individually on each of said electron beams.
A cathode ray tube equipped with an electron gun for radiating multiple electron beams, wherein said electron gun comprises a velocity modulation electrode for generating an electric field that exerts force individually on each of said electron beams to thus modulate a scanning velocity thereof.
A cathode ray tube equipped with an electron gun for radiating multiple electron beams, comprising a velocity modulation coil for generating a magnetic field that exerts force individually on each of said electron beams radiated from said electron gun.
A projector equipped with three monochromatic cathode ray tubes for red, green, and blue, each of said cathode ray tubes being provided with an electron gun for radiating multiple electron beams, wherein each of said electron guns comprises a velocity modulation electrode for generating a electric field that exerts force individually on each of said electron beams to thus modulate a scanning velocity thereof.
A projector equipped with three monochromatic cathode ray tubes for red, green, and blue, each of said cathode ray tubes being provided with an electron gun for radiating multiple electron beams, comprising a velocity modulation coil for generating a magnetic field that exerts force individually on each of said electron beams radiated from said electron gun to thus modulate a scanning velocity thereof.
Dependencies are inferred from the claim text.