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 printing apparatus includes a conveyor configured to convey a sheet along a conveyance path, a print head on the conveyance path, a main scan direction of the print head crossing the conveyance path, and a controller configured to control the print head to, in a first printing mode, set a print reference position to a first end of the print head in the main scan direction and print an image on the sheet from a leading end side of the image, and in a second printing mode, set the print reference position to a second end of the print head in the main scan direction and print the image on the sheet from a trailing end side of the image.

A printing apparatus includes a conveyor configured to convey a sheet along a conveyance path, a print head on the conveyance path, a main scan direction of the print head crossing the conveyance path, and a controller configured to control the print head to, in a first printing mode, set a print reference position to a first end of the print head in the main scan direction and print an image on the sheet from a leading end side of the image, and in a second printing mode, set the print reference position to a second end of the print head in the main scan direction and print the image on the sheet from a trailing end side of the image.

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.

According to an embodiment, a printer includes a thermal head with a plurality of heaters. A memory device stores utilization information indicating a status or cumulative usage amount of the thermal head. A processor is configured to acquire a measured resistance value for each of the heaters in the plurality of heaters and detect whether the thermal head has been changed since a previous use based on differences in the measured resistance values from reference resistance values. If it is detected that the thermal head has been changed, the processor updates the utilization information in the memory device to indicate the thermal head has been replaced.

According to an embodiment, a printer includes a thermal head with a plurality of heaters. A memory device stores utilization information indicating a status or cumulative usage amount of the thermal head. A processor is configured to acquire a measured resistance value for each of the heaters in the plurality of heaters and detect whether the thermal head has been changed since a previous use based on differences in the measured resistance values from reference resistance values. If it is detected that the thermal head has been changed, the processor updates the utilization information in the memory device to indicate the thermal head has been replaced.

An image forming apparatus includes a print head including heating elements for applying a thermal energy to an imaging material, an operation unit configured to operate the plurality of heating elements of the print head by using a first pulse for preheating the color developing layers and a second pulse for developing the colors of the color developing layers, and a generation unit configured to, in a case where a spatial frequency of the image to be recorded based on image data for forming an image on the imaging material is lower than a predetermined frequency, generate the first pulse so that a temperature to be applied to the imaging material by the first pulse is lower than a temperature to be applied to the imaging material in a case where the spatial frequency of the image data is equal to or higher than the predetermined frequency.

A printer includes a thermal head including a plurality of heat generating elements configured to apply energy to a recording medium, and a controller configured to perform control of periodically supplying the power to the plurality of heat generating elements. The recording medium includes a first color developing portion configured to develop a first color and a second color developing portion configured to develop a second color. The controller is configured to periodically supply the power to the plurality of heat generating elements, set an average cycle for supplying the power to a first average cycle, in a case of causing the first color developing portion to develop the first color, and set an average cycle for supplying the power to a second average cycle longer than the first average cycle, in a case of causing the second color developing portion to develop the second color.

When a CPU of a printing apparatus generates a red energization pattern for causing a print medium to develop a color, the CPU generates a subtraction pattern obtained by subtracting a portion of an amount of energy from a magenta energization pattern. The CPU calculates a logical sum of a yellow energization pattern and the subtraction pattern, to generate the red energization pattern.

When a CPU of a printing apparatus generates a red energization pattern for causing a print medium to develop a color, the CPU generates a subtraction pattern obtained by subtracting a portion of an amount of energy from a magenta energization pattern. The CPU calculates a logical sum of a yellow energization pattern and the subtraction pattern, to generate the red energization pattern.