| 摘要 |
PURPOSE:To make a thin frame usable, by installing elastic supporters to be situated in the longitudinal central part of the frame anew in addition to the other elastic supporters being situated corner parts of the frame when the frame of a shadow mask to be built in a color picture tube is clamped on an inner wall of the picture tube. CONSTITUTION:A vacuum envelope is constituted of a substantially rectangular panel 10, a flare-formed funnel 12 and a neck 13, and a phosphor screen 14 consisting of a striped phosphor layer of red, green and blue is installed in an inner surface of the panel 10. And, an in-line type electron gun 16 emitting three electron beams 20 corresponding to each color is set up in the neck 13, and there is provided with a mask frame 17 which supports a shadow mask 15 having a lot of slit openings so that the shadow mask is set near the screen. In this constitution, a corner part of the frame 17 are clamped to an inner surface of the envelope with elastic supporters 18a and stud pins 19, but furthermore at the central parts of the longitudinal sides of the frame 17 is also clamped with a similar elastic supporter 18b, making it suitable for a large-sized picture tube. |
