| abstract |
(57) [Summary] [PROBLEMS] A large screen that suppresses discharge outside the image area, stably forms a high-brightness good image for a long period of time, is inexpensive, has a large proportion of the image forming area, and is lightweight. Image forming apparatus. In an image forming apparatus, a spacer is provided. Is longer in the longitudinal direction than the length of the image forming member 12 in the longitudinal direction. And both ends of the spacer in the longitudinal direction are the outer periphery of the image forming member 12, It is arranged so as to be located between the inner periphery of the support frame. Similarly, the length of the spacer 101 in the longitudinal direction is longer than the length of the electron source region 2 in the longitudinal direction. |