JPH0362844U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1 is a block diagram showing an embodiment of this invention, Figure 2 is a connection diagram explaining heating control of a thermal head, Figure 3 is a block diagram showing the basics of a conventional device, and Figure 4 is a diagram of a conventional device. FIG. 2 is a block diagram showing the device. 3a, 3b, 3c, 3d...respectively shift register, 4a, 4b, 4c, 4d...respectively latch group, 5a, 5b, 5c, 5d...respectively drive circuit group, 6...respectively shift register, 7... …
Distribution latch, 10...memory, 20...address counter. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] Power supply points of group A are connected at predetermined intervals of a row of heating elements in which a plurality of heating elements are arranged in series in a line; The power supply points of group B are connected to each intermediate point between the power supply points of group A and the power supply points of group B, and a grounding switch is provided at each intermediate point between the power supply points of group A and the power supply points of group B. a drive circuit that connects and controls the grounding switches for each predetermined number of heating elements in the heating element array of this thermal head so as to divide the heat generating elements into a predetermined number and form a plurality of drive groups; is input, and it is determined whether this one line of print data is data that can generate heat based on the power source of group A or data that can generate heat based on the power source of group B, and which of the plurality of drive groups described above. Data storage means consisting of one memory and an address counter that distinguishes whether data belongs to a group by its storage address; among the data stored in this data storage means,
The data that can generate heat based on the power source of group A is sequentially read out in accordance with the arrangement order of each heating element of each drive group, and the data that can generate heat based on the power source of group B is sequentially distributed to the drive circuits of the drive group. The distributing means includes a distributing shift register and a distributing latch for sequentially reading and sequentially distributing to the drive circuits of the drive group in accordance with the arrangement order of each heating element of each drive group, and the distributing means: When each drive group of the drive circuit is filled with data that can generate heat based on the power source of group A, power is supplied to the supply point of the power source of group A, and the print data of group A of the one line of print data is is printed and each drive group of the drive circuit is filled with data that can generate heat based on the power supply of group B, power is supplied to the supply point of the power supply of group B, and B of the one line of printed data is A thermal head drive circuit that prints a group of print data and prints one line.