Control apparatus for fluorescent display tube

Details Control apparatus for fluorescent display tube Control apparatus for fluorescent display tube

1984-12-26

1987-04-14

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

219 1055B, 313513, 313516, 3151691, G09G 310

Patent

active

046581863

ABSTRACT:
A control apparatus for a fluorescent display tube controls selectively light emission of a plurality of display segments (7a to 7g) provided in a fluorescent display tube (1) so that desired data may be displayed. This apparatus is for example combined with a microwave oven, so as to display the cooking time or the remaining cooking time required for control of the microwave oven or to display the present time of day or other data. Among the display segments (7a to 7g), at least the display segments emitting light relatively less frequently are forced to emit light with predetermined timing, for example, each time cooking operation is ended, whereby irregularities in the frequency for light emission among the display segments (7a to 7g) can be avoided. As a result, no difference is caused in the display brightness in the respective display segments (7a to 7g) and accordingly, clearly visible display can be made.

REFERENCES:
patent: 3629653 (1971-12-01), Irwin
patent: 3723789 (1973-03-01), Tanji
patent: 3737707 (1973-06-01), Yanagisawa
patent: 3833833 (1974-09-01), Nelson
patent: 4070599 (1978-01-01), Uchikoba et al.
patent: 4443741 (1984-04-01), Tanaka et al.
patent: 4504716 (1985-03-01), Sakamoto
patent: 4517431 (1985-05-01), Ueda

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