Image printing apparatus and image printing method
US9888149B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2016 |
| Grant date | Feb 6, 2018 |
| Priority date | — |
| Expiry date | Jul 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6008
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image printing apparatus can print an image in which graininess is suppressed while using a color material of light blue. To achieve this, the color material of light blue satisfies the following condition.ΔLB≧(ΔLC−ΔLB)>0 andΔLB≧(ΔLM−ΔLB)>0Here, ΔLC represents a difference in lightness between cyan ink and a blank area, ΔLM represents a difference in lightness between magenta ink and the blank area, and ΔLB represents a difference in lightness between light blue ink and the blank area. Further, the color material of light blue satisfies the following condition.hC+(h(C+M)−hC)/2≦hB≦hM−(hM−h(C+M))/2Here, hC represents a hue of the cyan ink, hM represents a hue of the magenta ink, h(C+M) represents a hue of the image printed with the cyan ink and the magenta ink in the same amount, and hB represents a hue of the light blue ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.