Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Gradation control circuit of line thermal printer










Image Number 3 for United States Patent #5216440.

A gradation modulating apparatus is provided in a line thermal printer having a plurality of resistive elements arranged linearly widthwise of a medium sheet for printing gradated dots line-sequentially according to gradation image data. A memory is provided for storing individual weight data representative of energy generation rates of respective resistive elements, in corresponding addresses. An address generator is responsive to serial input of the gradation image data for generating an addressing signal effective to read out the stored individual weight data. A modulator is receptive of the inputted gradation data and the read weight data in synchronization with each other for producing modulated gradation image data according to the weight data. A latching circuit is connected for latching the modulated gradation image data line-sequentially. A driver is connected for applying driving signals regulated according to the latched modulated gradation image data to the resistive elements to enable the same to print dots having substantially the same print density for a given gradation level defined by the input gradation data.








 
 
  Recently Added Patents
Electrochemical reactor units and modules and systems composed of them
Molding cosmetic composite panels with visible fibers from ultraviolent light resistant epoxy compositions
Cleaning composition with surface modification polymer
Single quantum-dot based aptameric nanosensors
Packaging bag with fastener
Method of making an insulated gate semiconductor device and structure
Transmission of multimedia contents to a plurality of mobile users
  Randomly Featured Patents
Poured concrete column hole
Method for forwarding data to idle mobile nodes, and home agent control node for use in the method
Gels derived from extending grafted centipede polymers and polypropylene
Automobile bullet door-knob lock accessory
Dynamic rule-based version control system
Cartridge for managing ear buds
Electrical toaster
Closed case oscillating sprinkler
Bipolar silicon-on-insulator transistor with increased breakdown voltage
Zoom lens camera capable of trimming photographing with plural magnifications