Thermal transfer video printer having improved temperature correction function of coloring density
US5142302A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jun 25, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/365
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sublimation type thermal transfer color video printer generates a heating pulse having a duration corresponding to the tone level of the pixel to be printed, according to the data in a reference tone table stored in a memory, to energize the corresponding heating element of a thermal heat during the duration. The tone table includes a variable data which is the basis of determining the duration of the first energizing pulse required up to right before the coloring of a recording paper, and a fixed data which are the bases of determining the durations of subsequent energizing pulses. A variable value multiplied by these fixed data is set in a separate register. The variable data in the tone table and the variable value in the register are rewritten according to change in temperature of the thermal head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.