Back to results
US 2004/0145295 A1Published application
Structure of electron gun for color cathode ray tube
AssigneeLG.Philips Display Korea Co., Ltd.
InventorsCheol Ho Hwang, Moon Sik Kim, Ki Tae Kim, Dong Young Kim
Life of this patent
Estimating the term…
Abstract
A cathode ray tube with a reduced beam spot size on a fluorescent screen is obtained by forming electron beam passing holes on the electrodes composing a triode portion of an electron gun to have horizontally and vertically asymmetric shapes.
Claims25
A cathode ray tube with an electron gun comprising:
- a triode portion having a cathode;
- first and second electrodes for controlling and accelerating electron beams emitted from the cathode;
- and a plurality of focus electrodes for focusing the electron beams;
- wherein a ratio of a vertical size to a horizontal size of an electron beam passing hole on the first electrode ranges from 1.5 to 4.3.
1 more element
A cathode ray tube with an electron gun comprising:
- a triode portion having a cathode;
- a first electrode for controlling and accelerating electron beams emitted from the cathode with an electron beam passing hole that has a first horizontal and vertical size on a first side near the cathode and a second horizontal and vertical size on a second side opposite the first side;
- a second electrode for controlling and accelerating electron beams emitted from the cathode with an electron beam passing hole that has a third horizontal and vertical size;
- and a plurality of focus electrodes for focusing the electron beams;
- wherein a ratio of the second vertical size to a second horizontal size of an electron beam passing hole on the first electrode is greater than a ratio of the first vertical size to the first horizontal size.
2 more elements
Dependencies are inferred from the claim text.