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thermal print head
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A technology of thermal print head and heating part, applied in printing and other directions, can solve the problems of reduced printing quality, bleed, color bleeding, etc., and achieve the effect of improving heat dissipation
Active Publication Date: 2020-11-27
ROHM CO LTD
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Abstract
Description
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Problems solved by technology
In addition, if the temperature rise continues in a plurality of heat generating parts, bleeding (bleeding) will occur, and the printing quality will decrease.
Method used
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no. 1 Embodiment approach 〕
[0110] based on Figure 1 to Figure 9 , the thermal printhead A10 according to the first embodiment of the present invention will be described. The thermal print head A10 includes a substrate 10 , a glaze layer 30 , an electrode 40 and a resistor 50 . In addition, the thermal print head A10 further includes an intermediate layer 20 , a protective layer 60 , a driver IC 71 , a sealing resin 72 , a connector 73 and a heat sink 74 . Furthermore, in these figures, Figure 4 with Figure 5 , for the convenience of understanding, the protective layer 60 is seen through (see through). Figure 5 The shaded area of multiple dots shown represents the intermediate layer 20 .
[0111] The thermal print head A10 shown in these figures selectively generates heat by making a plurality of heat generating parts 51 (details will be described later) included in a resistor 50, as shown in FIG. image 3 As shown, it is an electronic device that prints on a recording medium 81 such as therma...
no. 2 Embodiment approach 〕
[0152] based on Figure 16 ~ Figure 19 , the thermal printhead A20 according to the second embodiment of the present invention will be described. In these figures, the same reference numerals are assigned to the same or similar elements as those of the above-mentioned thermal head A10, and repeated descriptions will be omitted. Furthermore, in these figures, Figure 16 The protective layer 60 is shown through (seeing through) for ease of understanding. Figure 16 The shaded area formed by the multiple dots shown represents the intermediate layer 20 .
[0153] In the thermal print head A20, the configurations of the intermediate layer 20, the glaze layer 30, the resistor 50, and the protective layer 60 are different from those of the thermal print head A10 described above.
[0154] Such as Figure 17 ~ Figure 19 As shown, the intermediate layer 20 has a pair of first intermediate portion 21 and second intermediate portion 22 . The pair of first intermediate portions 21 are...
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Abstract
The present invention provides a thermal print head capable of improving heat dissipation. The thermal printing head comprises: a substrate (10) having a main surface (11) facing the z direction; a glaze layer (30) stacked on the main surface (11); an electrode (40) arranged on the glaze layer (30) ); and a resistor (50), which is arranged in the main scanning direction, and includes a plurality of heat generating parts connected to the electrode (40), and the thermal print head also includes an intermediate layer (20), which is arranged on the main surface ( 11) Between the glaze layer (30), and the thermal conductivity coefficient is greater than that of the glaze layer (30), viewed from the z direction, a plurality of the heating parts overlap with the intermediate layer (20).
Description
technical field [0001] The present invention relates to thermal printheads. Background technique [0002] The thermal print head is the main component of a thermal printer that prints on recording media such as thermal paper. Patent Document 1 discloses an example of a conventional thermal printhead. The thermal printing head disclosed in this document includes an insulating substrate, a glaze layer covering the insulating substrate, electrodes arranged on the glaze layer, and a plurality of heating electrodes connected to the electrodes and arranged in the main scanning direction. part (constituting a heating resistor). By energizing through the electrodes, the plurality of heat generating portions selectively generate heat, whereby dot printing is performed on the recording medium. [0003] In recent years, a thermal print head capable of high-speed printing has been demanded. In order to enable high-speed printing, it is necessary to more quickly lower the temperature...
Claims
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Application Information
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