Radiation imagery chemistry: process – composition – or product th – Producing cathode-ray tube or element thereof – Using specific control or specific modification of exposure,...
Patent
1990-05-31
1992-07-21
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Producing cathode-ray tube or element thereof
Using specific control or specific modification of exposure,...
430 23, 430 26, G03C 500
Patent
active
051321874
ABSTRACT:
In a method of manufacturing a color cathode ray tube, a photosensitive layer is formed on a inner surface of a panel and a shadow mask is mounted in the panel. The photosensitive layer is exposed to a light beam which is emitted from a light source and passes through a lens system, a shutter and apertures of the shadow mask to form a pattern corresponding to the apertures of the shadow mask in an exposure step. In the exposure step, the shutter is moved along the inner surface of the panel and the light source is also moved in synchronism with the movement of the shutter. Thus, the light beam is so shifted as to satisfy the .gamma.-.DELTA.p characteristic of the cathode ray tube, which reflects the angle of deflection .gamma. of the electron beam and the corresponding displacement of the center (F) of the deflection .DELTA.p from where the center of deflection would be when the angle of deflection is zero.
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Kabushiki Kaisha Toshiba
Le Hoa Van
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