Printer and control method for printer

A control method for a printer, comprising:

• controlling a first group of heating units of a printing head to output first printing energy to form printing dots with a first density on a printing medium, wherein the first printing energy is printing energy output by the first group of heating units heating according to corresponding bits of first dot matrix data, and the first dot matrix data is dot matrix data obtained by processing received printing data;
• and
• controlling a second group of heating units of the printing head to output second printing energy to form printing dots with a second density on the printing medium, wherein the second printing energy is printing energy output by the second group of heating units heating according to corresponding bits of second dot matrix data, and the second dot matrix data is dot matrix data obtained by processing the first dot matrix data and configured for printing energy compensation,
• wherein the second group of heating units consists of heating units that need to implement printing energy compensation in the first group of heating units,
• wherein, in the process of controlling the second group of heating units of the printing head to output second printing energy to form printing dots with a second density on the printing medium, heating units that need not implement printing energy compensation in the first group of heating units are not required to output the second printing energy,
• wherein controlling the first group of heating units of the printing head to output the first printing energy to form the printing dots with the first density on the printing medium comprises:
• transmitting the first dot matrix data to a printing head driver;
• controlling the printing head driver to latch the bits of the first dot matrix data into corresponding heating units;
• and
• transmitting a first valid strobe signal with a duration of T to the printing head driver to control the first group of heating units to output the first printing energy;
• and
• wherein controlling the second group of heating units of the printing head to continue outputting the second printing energy to form the printing dots with the second density on the printing medium comprises:
• transmitting the second dot matrix data to the printing head driver;
• controlling the printing head driver to latch the bits of the second dot matrix data into the corresponding heating units;
• and
• transmitting a second valid strobe signal with a duration of Δt to the printing head driver to control the second group of heating units to output the second printing energy, wherein Δt=p*T, and p is a compensated energy percentage preset according to the printing density of the printing dots after the transmission of the first dot matrix data.