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A method for repairing resistance of a thermal print head

A thermal print head and resistance repair technology, applied in printing and other directions, can solve the problems of low resistance repair efficiency, unfavorable work efficiency, long time, etc., and achieve the effect of improving work efficiency and improving resistance repair efficiency.

Active Publication Date: 2019-08-20
SHANDONG HUALING ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As can be seen from the above, the existing resistance repairing process applies pulse voltage to each heating element unit sequentially for repairing resistance. The resistance repairing efficiency is low and the time is long, which is not conducive to the improvement of work efficiency.

Method used

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  • A method for repairing resistance of a thermal print head
  • A method for repairing resistance of a thermal print head
  • A method for repairing resistance of a thermal print head

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Embodiment Construction

[0025] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] The flow process of the method for repairing the resistance of the thermal print head involved in the present invention is as follows: figure 2 As shown, the method for repairing resistance comprises steps as follows:

[0027] Step S101 , testing the resistance values ​​of all heating element units of the thermal print head to be repaired. In this example, if image 3 As shown, the thermal print head to be repaired has a total of 448 heating element units, that is, 448 heating points. The resistance data of all heating element units obtained from the test are plotted to obtain the resistance curve A, where the maximum resistance value Rmax=816.58Ω , the minimum resistance Rmin=731.58Ω, the average resistance Rave=779.7Ω.

[0028] Step S102 , based on the above resistance values ​​of each heating element unit, determine the resista...

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Abstract

The invention provides a resistance correcting method of a thermosensitive printing head. The method comprises the steps of S101, testing the resistance of all heater units; S102, determining target resistance correcting resistance of each heater unit based on the tested resistance; S103, dividing all the heater units into a plurality of subareas; S104, selecting a first subarea; S105, determiningresistance correcting data of each heater unit in the selected subarea; S106, applying resistance correcting pulse to each heater unit in the selected subarea based on the resistance correcting datain order to perform resistance correction; S107, testing the resistance of each heater unit in the selected subarea; S108, determining whether the resistance of each heater unit is less than or equalto the corresponding target resistance; if not, returning to step S105; and if so, entering step S019; S109, determining whether the current subarea is the last subarea; if so, finishing the resistance correction; and if not so, entering step S110; and S110, switching to the next subarea; and returning to step S105. With the adoption of the abovementioned mode, the resistance correction efficiencycan be effectively improved.

Description

technical field [0001] The invention relates to the technical field of thermal printing heads, in particular to a method for repairing resistance of thermal printing heads. Background technique [0002] As we all know, the thermal print head is equipped with a plurality of heat-sensitive heating element units that are linearly arranged according to a certain resolution. By applying a corresponding pulse voltage to each heating element unit, the heating element unit produces Joule heating effect, and the applied electric energy It is converted into heat energy, and the heat energy generated by the heating element unit is used to act on the heat-sensitive medium to make the heat-sensitive medium develop color. Due to the deviation of the resistance value of the heating element unit, there is a difference in the heating value of the heating element unit during printing, resulting in a difference in printing density. The resistance value of each heating element unit reaches the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/335
Inventor 崔迎平赵哲于红强
Owner SHANDONG HUALING ELECTRONICS