Thermal head and head drive circuit therefor
US5702188A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Jul 11, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/35
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal head includes a thermal resistance member formed in a straight form, a first lead conductor group having a plurality of first lead conductors which are connected to the thermal resistance member, a second lead conductor group having a plurality of second lead conductors which are connected to the thermal resistance member, the first lead conductors and the second lead conductors being alternately arranged at a given interval, a third lead conductor group connected to the thermal resistance member between the first and second lead conductor groups, and a switch having a first selecting mode for selecting the first lead conductor group and a second selecting mode for selecting the second lead conductor group, wherein when the switch selects the first selecting mode, a region of the thermal resistance member sandwiched by the first lead conductor group and the third lead conductor group is heated, and when the switch selects the second selecting mode, a region of the thermal resistance member sandwiched by the second lead conductor group and the third lead conductor group is heated; and wherein the switch includes a potential applying unit for applying a preselected potentia…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.