Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1987-01-16
1989-03-21
Goldberg, E. A.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346 76PH, 219216, G01D 1510, H05B 300
Patent
active
048147877
ABSTRACT:
The relation between an input energy at a thermal head and recording density in a thermographical recording system varies inconveniently by the ambient temperature or the head temperature, and moreover, the slope of the relation varies by the temperatures. Therefore, even if the input energy at the thermal head alone is precisely and minutely controlled, it is heretofore difficult to obtain the desired recording density if the temperature fluctuates. Even if the temperature at the thermal head is detected by a temperature sensor, and compensation is made based on the detected temperature, it is still difficult to achieve recording of high quality because there inevitably arise a time lag between the detected temperature and the real temperature of a heating resistor which is recording images. This invention method enables high quality recording by estimating a real temperature at the heating resistor out of detected temperatures obtained with a temperature sensor and compensating the temperature based upon the estimated temperature.
REFERENCES:
patent: 4391535 (1983-07-01), Palmer
patent: 4536774 (1985-08-01), Invi et al.
Fuji Photo Film Co. , Ltd.
Goldberg E. A.
Preston Gerald E.
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