The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2002
Filed:
Jan. 24, 2000
Itsuro Komori, Osaka, JP;
Osamu Adachi, Osaka, JP;
Yasunori Miura, Osaka, JP;
Toshiaki Katano, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The present invention relates to a color cathode ray tube that reduces a leakage electric field and a maximum instantaneous current generated in a bulb at the time of electric discharge and provides a stable connection of conductive layers with different specific resistance. A first conductive layer is formed on the entire area of an inner wall of a funnel including a contact portion of a first spring supported by a shadow mask structure, an anode button and a contact portion of a second spring supported by a final electrode of an electron gun. A second conductive layer with a specific resistance lower than that of the first conductive layer is formed on the surface of the first conductive layer within the range extending from the anode button to the contact portion of the first spring. The contact portion of the first spring contacts the second conductive layer, thereby electrically connecting the shadow mask structure to the second conductive layer, and the contact portion of the second spring contacts the first conductive layer, thereby electrically connecting the final electrode to the first conductive layer.