In some examples, continuous frequency based print pipeline generation may include ascertaining an input image that is to be printed. For a specified pixel of the input image, a first frequency and a second frequency that respectively correspond to first and second colors may be determined. Based on the first frequency and the second frequency, an intermediate frequency that is to be generated to produce an intermediate color relative to the first and second colors may be determined. The intermediate frequency may be converted to discrete pulses. Operation of a printhead that is to print the specified pixel may be controlled based on the discrete pulses.

The thermal printer includes a heating element, and a voltage supply circuit that supplies a drive voltage and a test voltage to the heating element. The voltage supply circuit includes a drive voltage supply circuit that is coupled to the heating element and that turns ON the supply of the drive voltage to the heating element, a test voltage supply circuit that is coupled to the heating element and that turns ON the supply of the test voltage to the heating element, a drive voltage stop circuit setting the supply of the drive voltage of the drive voltage supply circuit OFF, and a test voltage stop circuit setting the supply of the test voltage of the test voltage supply circuit OFF.

The thermal printer includes a heating element, and a voltage supply circuit that supplies a drive voltage and a test voltage to the heating element. The voltage supply circuit includes a drive voltage supply circuit that is coupled to the heating element and that turns ON the supply of the drive voltage to the heating element, a test voltage supply circuit that is coupled to the heating element and that turns ON the supply of the test voltage to the heating element, a drive voltage stop circuit setting the supply of the drive voltage of the drive voltage supply circuit OFF, and a test voltage stop circuit setting the supply of the test voltage of the test voltage supply circuit OFF.

The present application provides a fixation structure for a thermal printing head, and the fixation structure comprises a first circuit board, a first fixation member disposed on one side of the first circuit board, and a second circuit board. A first slot is formed between the first fixation member and the first circuit board. A first limited member and a second limited member are disposed on both ends of the first fixation member with a first protruded member and a second protruded member disposed slidably on one side of both respectively. The second circuit board is disposed slidably between the first limited member and the second limited member and inserted to the first slot. This structure facilitates rapid installation of circuit boards. Furthermore, a first locking slot may be capable of rotating and disposed inside the first fixation member for providing rapid installation of circuit boards.

The present application provides a fixation structure for a thermal printing head, and the fixation structure comprises a first circuit board, a first fixation member disposed on one side of the first circuit board, and a second circuit board. A first slot is formed between the first fixation member and the first circuit board. A first limited member and a second limited member are disposed on both ends of the first fixation member with a first protruded member and a second protruded member disposed slidably on one side of both respectively. The second circuit board is disposed slidably between the first limited member and the second limited member and inserted to the first slot. This structure facilitates rapid installation of circuit boards. Furthermore, a first locking slot may be capable of rotating and disposed inside the first fixation member for providing rapid installation of circuit boards.

A printing apparatus including: a thermal head; a capacitor capable of being charged and discharged; a detection unit configured to detect a voltage of the capacitor; a battery accommodation part configured to accommodate a dry-cell battery configured to supply electric power for charging the capacitor; a charging unit configured to charge the capacitor by the electric power of the dry-cell battery; and a controller configured to: execute charging control of controlling the charging unit to charge the capacitor by the electric power of the dry-cell battery, and execute printing control of performing printing on a printing medium by driving the thermal head only with the electric power charged in the capacitor, depending on the voltage detected by the detection unit.

A thermal printer according to one embodiment includes a thermal head, a temperature sensor, and a control unit. The thermal head includes a plurality of heating elements. The temperature sensor is provided in the thermal head and is configured to measure a temperature of the thermal head. The control unit is configured to control an amount of heat generated from the heating elements by determining a pulse supply time for which a pulse signal is supplied to the thermal head based on the temperature of the thermal head and a cumulative heat generation time of the thermal head.

A semiconductor device is adapted for controlling energization of a heating element that performs printing. The semiconductor device includes: a strobe signal input unit receiving a printing strobe signal that causes the heating element to generate heat for printing; a preheating strobe generation circuit generating a preheating strobe signal that causes the heating element to preheat by compressing a waveform of the printing strobe signal in a time axis direction; and an output controller outputting a control signal that controls energization of the heating element based on the printing strobe signal and the preheating strobe signal.

A printer includes: a first connector to be used to input electric power supplied from an outside; a second connector to which a communication terminal is to be connected, and which is to be used to output at least a part of the electric power to the connected communication terminal; a printing control unit configured to control operation of a printing unit configured to perform printing on recording paper; and an adjustment unit configured to adjust a maximum amount of the electric power to be output from the second connector, of the electric power supplied from the outside, to a first amount of power when the printing unit is not under a printing operation, and adjust the maximum amount of the electric power to be output from the second connector to a second amount of power when the printing unit is under the printing operation, the second amount of power being smaller than the first amount of power.

The present invention provides a thermal sensing device having cleaning function and the method for using the same. The thermal sensing device comprises a top lid and a bottom lid. The top lid includes a thermal sensing member; the bottom lid includes a paper roller correspondingly. When the top lid covers the bottom lid, the paper roller contacts the thermal sensing member. To clean, take out the paper roller, dispose a cleaning roller inside the bottom lid, and cover the top lid to the bottom lid so that the thermal sensing member contacts the cleaning roller. Drive a motor in the bottom lid to rotate the cleaning roller. Since the cleaning roller includes an antistatic glue layer, the cleaning roller will adhere to one or more object on the thermal sensing member via the antistatic glue layer.