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US 4,396,923 AGranted
Recording control apparatus
AssigneeCanon Kabushiki Kaisha
InventorAtsushi Noda
Life of this patent
Estimating the term…
Abstract
A recording head having actuators driven by voltage supplied from a drive circuit constitutes a part of paths of a compensating circuit for compensating the drive voltage from the drive circuit. The paths are selectively cut off to compensate the drive voltage supplied to the actuators.
Claims10
A recording control apparatus comprising:
- a recording head including;
- a heat generating resistor for generating heat by a drive signal;
- a drive signal compensating pattern of which a part of a path of said pattern is cut off at a position providing an indication of a cutting position in response to a resistance value peculiar to said heat generating resistor;
- and
- a recording head drive circuit including:
- a switching element for selectively supplying said drive signal to said heat generating resistor;
- a first element for determining the voltage of said drive signal in response to a second element;
- and
- a second element, one end of which is connected to said first element and the other end is connected to said compensating pattern.
6 more elements
A recording control apparatus comprising:
- a recording head including:
- (1) a plurality of heat generating resistors being connected to a plurality of first terminals fixed on said head for generating heat by drive signals supplied through said plurality of first terminals;
- and,
- a dummy heat generating resistor having characteristics similar to that of said heat generating resistors and being connected to a second terminal fixed on said head;
- and,
- (2) a recording head drive circuit having a transistor element for determining the voltage of drive signals to be supplied to said plurality of heat generating resistors through said plurality of first terminals in response to a resistance value of said dummy heat generating resistor when connected to said second terminal.
3 more elements
A recording control apparatus provided with a thermal head comprising:
- a plurality of resistors functioning as heat generating elements on the surface of said head;
- a common terminal connecting each of said plurality of resistors through a common pattern and mounted on one end of the surface of said head;
- signal terminals equal in number to said plurality of resistors and separately connected to each of said plurality of resistors through signals patterns, said signal terminals being mounted on the one end of the surface of said head;
- and
- a compensating terminal connected to said common terminal through a compensating pattern and mounted on the one end of the surface of said head.
2 more elements
A recording control apparatus comprising:
- a recording head having a plurality of heat generating resistors each with similar character;
- and
- means for determining the voltage of drive signals to be supplied to the resistors in response to a resistance value of the resistors when at least one of the resistors is connected thereto.
A recording control apparatus comprising:
- (1) recording means including:
- heat generating means for generating heat by a drive signal;
- and
- compensating means for determining the voltage of the drive signal to be supplied to said heat generating means by cutting off said recording means at a position providing an indication of a cutting position in response to the voltage peculiar to said heat generating means;
- and
- (2) means for providing the drive signal which is being determined by said compensating means for said heat generating means.
3 more elements
Dependencies are inferred from the claim text.