Method for thermal printing
US6597385B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Jan 22, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/36
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for printing an image using a thermal printing system comprising a thermal printer having a thermal head TH incorporating a plurality of energisable heating elements Hn and a thermographic material m, comprises several steps. These steps comprise supplying image data Id corresponding to a plurality of output values Dn to a processing unit, reading a first table LUT1 comprising first entries for desired output values Dk and second entries for sequences Sk of time slices si of activation pulses, transformation of the image data Id into corresponding sequences Sk of time slices of activation pulses, providing the time slices of activation pulses to the heating elements Hn of the thermal head TH, and printing the image by transporting the thermographic material past and adjacent to the thermal head and by activating the heating elements Hn of the thermal head. Herein, the transformation of the image data Id comprises a step of establishing a relation between output values Dkcm or Dkcml which are both continuous and monotone and in the latter case linear as well, and corresponding sequences Sk of time slices si of activation pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.