# US 8,770,627 B2 · Product security pattern based on simultaneous color contrast

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- Number: US 8,770,627 B2
- Document ID: US8770627B2
- Status: Granted
- Kind: B2
- Application number: 11/280,897
- Filed: 2005-11-16
- Published: 2007-05-17
- Granted: 2014-07-08
- Earliest claimed: 2005-11-16
- Assignees: Hewlett-Packard Development Company, L.P.
- Applicants: Giordano Beretta
- Inventors: Giordano Beretta
- Web page: https://patentgrep.com/patent/US8770627B2

## CPC

- B42D 25/328: Diffraction gratings; Holograms
- B42D 25/00: Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof (printing processes to produce identification or security features B41M3/14)
- B42D 25/29: Securities; Bank notes
- B42D 2035/24
- B42D: BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS

## Abstract

A product package article has an HVS-perceivable security pattern on its surface. The security pattern is based on simultaneous color contrast. The security pattern can provide protection against counterfeiting.

## Claims

### Claim 1

A product package article comprising
a first HVS-perceivable security pattern applied onto a surface of the article and a second HVS-perceivable security pattern applied onto a surface of the article, wherein the first and second HVS perceivable security patterns are based on simultaneous color contrast, wherein the first and second security patterns have backgrounds of different colors and foreground objects of the same color to increase simultaneous color contrast effects, where the foreground and background colors of each security pattern have different contrast levels to create an illusion that the foreground objects are of different colors; and
an anti-scan pattern applied onto the surface of the article, wherein the anti-scan pattern is not perceivable by the HVS.

### Claim 2 (depends on 1)

The article of claim 1, wherein the security patterns are human visual system (HVS) security patterns.

### Claim 3 (depends on 1)

The article of claim 1, wherein foreground features of the security pattern are smaller than 3.5 mm.

### Claim 4 (depends on 1)

The article of claim 1, wherein the security patterns are spaced apart on the surface of the article.

### Claim 5 (depends on 1)

The article of claim 1, wherein more than two security patterns are on the surface of the article.

### Claim 6

A product package article comprising
a first HVS-perceivable security pattern applied on a surface of the article and a second HVS-perceivable security pattern applied on a surface of the article, wherein the first and the second HVS-perceivable security patterns are based on simultaneous color contrast, wherein each security pattern includes adjacent first and second objects of contrasting colors, where the first objects of the first and second security patterns have the same color and the second objects of the first and second security patterns have different colors to increase simultaneous color contrast effects and to create an illusion that the first objects have different colors; and
an anti-scan pattern applied on the surface of the article, wherein the anti-scan pattern is not perceivable by the HVS.

### Claim 7 (depends on 6)

The article of claim 6, wherein the security patterns are human visual system (HVS) security patterns.

### Claim 8 (depends on 6)

The article of claim 6, wherein foreground features of the security patterns are smaller than 3.5 mm.

### Claim 9 (depends on 6)

The article of claim 6, wherein the security patterns are spaced apart on the surface of the article.

### Claim 10 (depends on 6)

The article of claim 6, wherein more than two security patterns are on the surface of the article.

### Claim 11 (depends on 6)

The article of claim 6, wherein the first security pattern including adjacent first and second objects and the second security pattern including adjacent first and second objects, wherein the security patterns are on different sides of the article.