| 摘要 |
PURPOSE:To make it possible to divide a picture screen through forming a display effective part and a display non-effective part by selectively forming a phosphor layer in a necessary region. CONSTITUTION:A film is formed with a photo sensitive material on the inside surface of a panel portion of a glass bulb 1, and then a light shielding plate 2 corresponding to an effective part of the panel portion is klaced on the outer surface of the panel portion and the panel portion is exposed by a light source 3 having the wave length corresponding to the photosensitivity. A nonfluorescent material is sprayed inside the glass bulb 1 from a tank 4 which stores the non-fluorescent material by a nozzle 5. After that, clean air controlled by an air pressure controller 7 is sprayed by a clean air nozzle 6 to remove the surplus nonfluorescent material. Next, the glass bulb with the non-fluorescent material stuck to a non-effective part is exposed to a light source 3 from the side of the panel portion to give adhesion to the effective part. Further, the necessary fluorescent material is sprayed from the fluorescent material tank 9 by a nozzle 8 to make fluorescent material stick to the 6 part with adhesion.
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