Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1986-12-15
1989-02-28
Fields, Carolyn E.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358217, 378 99, H04N 534, H01J 3138
Patent
active
048090719
ABSTRACT:
A television camera device for obtaining an image of high resolution by making the number of scanning lines on the target plate of an image pickup tube about twice larger than that in the television standard system and making the scanning speed of electron beam at the surface of the target plate smaller than that in the television standard system, is disclosed in which an electric field intensity in a region between the target plate and a mesh electrode (namely, the fourth grid electrode) is made greater than or equal to 5.3 KV/cm, to improve the landing characteristics of scanning electron beam, thereby preventing the occurrence of the water fall phenomenon peculiar to a slow scanning operation.
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patent: 4331980 (1982-05-01), Ryan
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patent: 4590518 (1986-05-01), Fenster et al.
patent: 4593321 (1986-06-01), Bloom et al.
patent: 4704635 (1987-11-01), Nudelman
Maruyama Masanori
Takahashi Fumitaka
Tsuneoka Masayuki
Yokouchi Hisatake
Fields Carolyn E.
Hitachi, Ltd. & Hitachi Medical Corp.
Hynds Joseph
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