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US 6,479,952 B2Granted
CRT display apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsHironobu Yasui, Akinori Heishi
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Abstract
A display apparatus includes a CRT, the CRT including an electron gun having a cathode, a G1 electrode, a G2 electrode, and a G3 electrode disposed in that order to draw electrons from the cathode. The electron gun further has a modulating Gm electrode disposed between the G2 and G3 electrodes. The display apparatus is provided with a controller for controlling a value of a voltage applied to the Gm electrode to adjust brightness of a picture on a screen of the CRT.
Claims4
A CRT display apparatus comprising:
- a CRT including an electron gun,
- said electron gun having a cathode, a G1 electrode, a G2 electrode and a G3 electrode disposed in that order to draw electrons from said cathode, said electron gun further having a modulating Gm electrode disposed between said G2 and G3 electrodes;
- and
- a controller for controlling a value of a voltage applied to said Gm electrode to adjust brightness of a picture on a screen of said CRT.
1 more element
A CRT display apparatus comprising:
- a CRT including an electron gun,
- said electron gun having a cathode, a G1 electrode, a G2 electrode and a G3 electrode disposed in that order to draw electrons from said cathode, said electron gun further having a modulating Gm electrode disposed between said G2 and G3 electrodes;
- and
- a controller for controlling a value of a voltage applied to said G2 electrode to adjust contrast of a picture on a screen of said CRT.
1 more element
Dependencies are inferred from the claim text.