Cathode ray electron gun with an improved beam formation structure
OwnerGregoire Gissot, Pierre Bizotinventors
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Abstract
The invention relates to an electron gun for cathode ray tubes comprising a cathode emitting an electron beam according to a determined propagation axis, and, aligned in series according to this axis, successively a first electrode, a second electrode. The first electrode comprises a first plate featuring rectangular apertures, the edges of which have a constant thickness. The second electrode comprises a second plate featuring circular apertures of diameter Φ greater than the largest dimensions of the rectangular apertures. They will preferably be: 0.7 mm≦W≦0.9 mm 0.5 mm≦H≦0.7 mm 0.5 mm≦Φ≦0.9 mm and the distance d between the first and second electrodes such that: 3.34 mm≦d≦0.45 mm Applications: Electron gun for cathode ray tube.
Claims7
Electron gun for cathode ray tube comprising at least one cathode emitting a electron beam according to a determined propagation axis, and, aligned in series according to this axis, successively a first electrode, a second electrode, and at least one output lens of the electron gun, the said first electrode comprising a first plate featuring at least one rectangular aperture, wherein:
- the edges of the said rectangular aperture of the said first plate have a constant thickness all around the aperture,
- and in that the second electrode comprises a plate featuring at least one circular aperture centred on the said axis, the large dimension of the rectangular aperture of the first electrode being less than the diameter of the circular aperture of the second electrode.
Dependencies are inferred from the claim text.