A method operates a thermal printer to print on thermal paper. A thermo-reactive layer of the paper forms a first color at a first temperature and a second color at a second, higher temperature. The printer has a printhead with heat sources arranged next to one another transversely to a paper path. The heat sources are selectively controllable. The method includes: a transport roller line by line moving the paper past the printhead; and in each line of the paper, heating selected heat sources. At points at which the second color is formed on the paper, a plurality of adjacent heat sources is heated to a printing temperature. At points at which the first color is to be formed on the paper, a portion of a plurality of the adjacent heat sources is heated to the printing temperature, and the other portion of the adjacent heat sources is not heated.

A method operates a thermal printer to print on thermal paper. A thermo-reactive layer of the paper forms a first color at a first temperature and a second color at a second, higher temperature. The printer has a printhead with heat sources arranged next to one another transversely to a paper path. The heat sources are selectively controllable. The method includes: a transport roller line by line moving the paper past the printhead; and in each line of the paper, heating selected heat sources. At points at which the second color is formed on the paper, a plurality of adjacent heat sources is heated to a printing temperature. At points at which the first color is to be formed on the paper, a portion of a plurality of the adjacent heat sources is heated to the printing temperature, and the other portion of the adjacent heat sources is not heated.

A printing device includes: a thermal head; and a processor. The thermal head includes a heating element. The processor is configured to perform: (a) creating; and (b) driving. The (a) creating creates print data based on image data representing an image to be printed on a printing medium. The (b) driving drives the heating element to apply heat to the printing medium according to the print data. The processor is configured to further perform: (c) determining. The (c) determining determines whether to create a plurality of labels for lamination using at least one printing medium including a first printing medium. The first printing medium is transparent and includes a plurality of heat-sensitive layers laminated together. Each of the plurality of heat-sensitive layers is configured to develop a different color when heat is applied from the heating element. The (c) creating is performed in accordance with a determination result in (a).

A thermal transfer printer includes a first supply unit configured to supply an intermediate transfer medium in which, on one surface of a first base, a transfer layer including a receiving layer is disposed, a second supply unit configured to supply a thermal transfer sheet in which, on one of surfaces of a second base, a colorant layer and a particle layer are disposed, a printing unit configured to heat the thermal transfer sheet, to transfer a colorant from the colorant layer to the receiving layer to form an image, and to transfer the particle layer onto the receiving layer, a third supply unit configured to supply a transfer-receiving body, and a transfer unit configured to place the intermediate transfer medium and the transfer-receiving body on top of each other such that the transfer-receiving body faces the particle layer on the receiving layer, and to heat the intermediate transfer medium.

A thermal head includes a substrate, a plurality of heat generating portions, electrodes, pads, driving ICs, and a wire. The plurality of heat generating portions are positioned on the substrate and arranged in a main scanning direction. The electrodes are positioned on the substrate and electrically coupled to each of the plurality of heat generating portions. The pads are positioned on the substrate and coupled to the electrodes. The driving ICs drive the heat generating portions. The wire couples the driving ICs and the electrodes to each other. The thermal head according to the present disclosure includes a plurality of the pads. At least one of the pads is a multi pad that has a first region to which the wire is connected and a second region to which each of a plurality of probes is connected.

A thermal head according to the present disclosure includes a substrate, a plurality of heat generating portions, a plurality of first electrodes, and a second electrode. The plurality of heat generating portions are located on the substrate. The plurality of first electrodes are located on the substrate and respectively connected to the plurality of heat generating portions. The second electrode is located on the substrate and is located across the plurality of first electrodes. The second electrode includes protruding portions protruding in a first direction from the second electrode toward corresponding ones of the first electrodes and being in contact with the corresponding ones of the first electrodes.

A liquid ejection head includes a recording element substrate including an ejection port member including a liquid ejection port, an electrical wiring layer including a pressure generating element that pressurizes the liquid to eject the liquid and an electrically connecting part connected to the pressure generating element to supply power for driving the pressure generating element to the pressure generating element, and a silicon substrate having the ejection port member and the electrical wiring layer. The silicon substrate includes a through-hole passing through the silicon substrate to expose the electrically connecting part. An outer shape of an opening of the through-hole on the back side of the silicon substrate has no side parallel to direction [110] of the silicon substrate or has a side parallel to the direction [110]. The side has a length equal to or less than half an entire length of the through-hole in the direction [110].

The present invention provides a thermal print head capable of better performing printing on a printing medium; the thermal print head including: a substrate (1), formed with single crystal semiconductor; a resistor layer (4), including a plurality of heating portions (41) arranged in a main scan direction; and a wiring layer (3), configuring a charging path to the plurality of heating portions. The substrate includes: a main surface (11), being a surface opposite to the resistor layer; and a convex portion (13), disposed as protruding from the main surface and extending in the main scan direction. The convex portion includes: an inclining surface (132), inclining relative to the main surface and extending in a linear manner when viewing from the main scan direction; and a curving surface (131), disposed, in a protruding direction of the convex portion, on a position farther away from the main surface than the inclining surface, and curving in a manner that protrudes toward the protruding direction. Each of the plurality of heating portions includes a heating curving portion (411) formed on a portion corresponding to the curving surface.

A thermal printer comprising a thermal head including an array of heating elements disposed on the thermal head, the array of heating elements including optical structures comprising an array of first pixels corresponding to a first color and second pixels corresponding to a second color, the first color being different from the second color; wherein individual ones of the pixels comprise sub-pixels, a given pixel comprising a first sub-pixel and a second sub-pixel, the first sub-pixel comprising a first optical structure corresponding to light to be reflected or transmitted from a substrate toward a left eye of a person from a first viewing angle, the second sub-pixel comprising a second optical structure corresponding to light to be reflected or transmitted from a substrate toward a right eye of the person from the first viewing angle, and the first sub-pixel and the second sub-pixel correspond to the color of light of the given pixels to be reflected or transmitted from a substrate.

To prevent an insufficient development density of pixels with which a high-density image is recorded. Thermal energy to be applied to a pixel of interest is increased if a pixel immediately subsequent to the pixel of interest is one to which energy not causing heat propagation to the pixel of interest is applied.