Printing device, printing method, and printing control program product
US7388688B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2004 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Jun 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention employs at least three chromatic colored inks as well as a chromatic colored ink that has a lower spectral reflectance at each wavelength region in which the spectral reflectance of these three colored inks is greater. The chromatic colored ink is added to the at least three colors to enable printing with minimal differences between colors seen under a certain standard light source and the same colors seen under another light source. It is thus possible to ensure printing with fewer changes in color as a result of changes in light source, such as the ability to produce colors having a generally constant spectral reflectance across all wavelengths by combining inks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.