§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
EP0454273A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

RGB color database and method for creating same

Assignee: Bayer Corp
•
Filing: 1991-04-24
•
Granted: —
•
Expires: 2011-04-24
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An RGB color database and method for creating the database are disclosed. A chromaticity gamut for the RGB primaries of a display device is defined as is a chromaticity gamut for printing ink primaries. A triangular chromaticity gamut of virtual primaries R', G', B' is defined that includes both the printable ink chromaticity gamut and the display device chromaticity gamut with the virtual R', G', B' primaries being located on the respective extensions of the three lines that connect the neutral chromaticity point with the R, G, B primaries of the display device triangular chromaticity gamut. Color data is then defined in terms of the R', G', B' virtual primaries to produce the RGB color database.

Inventors

  • 👤 Paul A. Delabastita

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-31 19:32
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6058

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 132 words
A method for creating an RGB database for use with color display devices and printing inks, said method comprising the steps of: A. defining a chromaticity gamut for the R, G, B primaries of a color display device; B. defining a chromaticity gamut for printing ink primaries; C. defining a triangular chromaticity gamut of virtual primaries R', G', B' that includes both the printable ink chromaticity gamut and the color display device chromaticity gamut with the virtual R', G', B' primaries being located on the respective extensions of the three lines that connect the neutral chromaticity point with the R, G, B primaries of the color display device chromaticity gamut; and D. defining color data in terms of said R', G', B' virtual primaries, said defined color data comprising an RGB database.
Claim 2
Dependent Claim 10 words
The RGB database produced by the method of Claim 1.
Claim 3
Dependent Claim 31 words
The method of Claim 1 wherein the C, Y, M primaries of the printing ink chromaticity gamut are located within the triangular chromaticity gamut of the R', G', B' virtual primaries.
Claim 4
Dependent Claim 10 words
The RGB database produced by the method of Claim 3.
Claim 5
Dependent Claim 34 words
The method of Claim 1 wherein the C, Y, M primaries of the printing ink chromaticity gamut are located on the sides of the triangular chromaticity gamut of the R', G', B' virtual primaries.
Claim 6
Dependent Claim 10 words
The RGB database produced by the method of Claim 5.
Claim 7
Dependent Claim 51 words
The method of Claim 1 wherein the saturation of each of the printing ink primaries CM, CY and MY is increased without changing the hue thereof to create virtual printing ink primaries CM', CY' and MY' that are included in the triangular chromaticity gamut of the virtual R', G', B' primaries.
Claim 8
Dependent Claim 10 words
The RGB database produced by the method of Claim 7.
Claim 9
Dependent Claim 32 words
The method of Claim 7 wherein the CY' virtual printing ink primary is located on the G' - B' side of the triangular chromaticity gamut of the virtual R', G', B' primaries.
Claim 10
Dependent Claim 10 words
The RGB database produced by the method of Claim 9.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag