Patent ID: 6376979
Filing Date: 2002-04-23
Classification: H01J

Abstract:
A color cathode ray tube comprising:a bulb having a panel with a phosphor screen disposed on an inner surface of said panel and a funnel; a shadow mask structure having a shadow mask that is provided in opposition to the phosphor screen on the inner surface of said panel; an electron gun enclosed in a neck portion of said funnel; a conductive layer provided on an inner wall of said funnel; an anode button provided in said funnel and used for applying high voltage to said conductive layer; a first spring supported by said shadow mask structure and having a contact portion that is biased against said conductive layer; and a second spring supported by a final electrode of said electron gun and having a contact portion that is biased against said conductive layer; wherein said conductive layer comprises a first conductive layer and a second conductive layer having a lower specific resistance than said first conductive layer, said first conductive layer is formed on an entire range of the inner wall of said funnel to be provided with said conductive layer, and said second conductive layer is formed on said first conductive layer within a range from said anode button to the contact portion of said first spring, and the contact portion of said first spring contacts said second conductive layer, thereby electrically connecting said shadow mask structure to said second conductive layer, and the contact portion of said second spring contacts said first conductive layer, thereby electrically connecting the final electrode to said first conductive layer.