Patent ID: 6577052
Filing Date: 2003-06-10
Classification: H01J

Abstract:
A projection type cathode ray tube comprising:a panel; and an electron gun; wherein said electron gun has a plurality of electrodes including a cathode, a control electrode, an accelerating electrode, a first anode, a focus electrode and a second anode, which electrodes are arranged in a tube axial direction at predetermined intervals, and said second anode having a first cylindrical portion at a panel side and a second cylindrical portion at a cathode side, said first cylindrical portion having a larger inner diameter than an inner diameter of said second cylindrical portion, said focus electrode having a panel side cylindrical portion with an inner diameter D1 and a length L1, an intermediate cylindrical portion with an inner diameter D3 and a length L3, a cathode side cylindrical portion with an inner diameter D2 and a length L2, said inner diameters D1, D2, and D3 being different from each other, and said length L3 being larger than said length L2, and said focus electrode having a first funnel like connecting portion between said panel side cylindrical portion and said intermediate cylindrical portion.