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US 2003/0146685 A1Published application
Cathode ray tube
AssigneeLG. Philips Displays Korea Co., Ltd.
InventorJin Yeal Choi
Life of this patent
Estimating the term…
Abstract
Disclosed is a cathode ray tube with an electron gun capable of improving a resolution of an image by preventing electron beams from striking electrodes and efficiently controlling a spot size that is susceptible to a change in current capacity.
Claims12
A cathode ray tube with an electron gun comprising a cathode for emitting electron beams;
- and a first electrode, a second electrode, a third electrode, a fourth electrode, a fifth electrode, a sixth electrode and a shield cup,
- which are arranged in a cited order from the cathode to the direction of a fluorescent screen, where a vertical size, W, of a recess formed on the second electrode, a depth, d, of the recess, a diameter, A, of an electron beam passing hole formed on the fourth electrode, and a thickness, t, of the electron beam passing hole satisfy a relation of
- 19 0.22 ≤ d W + t A ≤ 0.38 .
A cathode ray tube with an electron gun comprising a cathode for emitting electron beams;
- and a first electrode, a second electrode, a third electrode, a fourth electrode, a fifth electrode, a sixth electrode and a shield cup,
- which are arranged in a cited order from the cathode to the direction of a fluorescent screen, coining parts being formed on a front surface of the second electrode at regular intervals, where a thickness, h, of the electrodes without adding a depth of the coining part, a space, s, between the second electrode and the third electrode, a thickness, t, of the fourth electrode, which is spaced out for a predetermined distance from the third electrode, and a diameter, A, of an electron beam passing hole formed on the fourth electrode satisfy a relation of
- 20 0.6 ≤ h s + t A ≤ 0.8 .
A cathode ray tube with an electron gun comprising a cathode for emitting electron beams;
- and a first electrode, a second electrode, a third electrode, a fourth electrode, a fifth electrode, a sixth electrode and a shield cup,
- which are arranged in a cited order from the cathode to the direction of a fluorescent screen, coining parts and recesses being formed on a front surface of the second electrode at regular intervals, where a thickness, h, of the electrodes without adding a depth of the coining part, a vertical size, W, of the recess, a depth, d, of the recess, a space, s, between the second electrode and the third electrode, a thickness, t, of the fourth electrode, which is spaced out for a predetermined distance from the third electrode, and a diameter, A, of an electron beam passing hole formed on the fourth electrode satisfy relations of
- 21 0.22 ≤ d W + t A ≤ 0.38 and 0.6 ≤ h s + t A ≤ 0.8 .
Dependencies are inferred from the claim text.