Display data processing device

Details Display data processing device Display data processing device

1989-08-30

1990-09-11

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

358148, G09G 100

Patent

active

049566393

ABSTRACT:
A display data processing device for processing bar code data displayed on a display screen such as a television monitor by an interlaced scanning process includes a photosensor for reading bar code data displayed on the screen, a counter circuit for counting the coded data bits read by the photosensor means to determine whether the data is displayed by an odd-number field or an even-number field and which produces a signal corresponding to the result of the determination. This signal is used in conjunction with a plurality of timer circuits which provide signals corresponding to the duration of odd and even number field scanning periods to ensure accurate storing of data in a shift register which is provided with the output signals of the photosensor.

REFERENCES:
patent: 3737566 (1973-06-01), Baer et al.
patent: 3984862 (1976-10-01), Volz
patent: 3993861 (1976-11-01), Baer
patent: 4329684 (1982-05-01), Monteath et al.
patent: 4654700 (1987-03-01), Baer

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