# US 2021/0280118 A1 · System and method for a six-primary wide gamut color system

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- Number: US 2021/0280118 A1
- Document ID: US20210280118A1
- Status: Published application
- Kind: A1
- Application number: 17/320,912
- Filed: 2021-05-14
- Published: 2021-09-09
- Earliest claimed: 2018-10-25
- Assignees: Baylor University
- Applicants: Baylor University
- Inventors: Gary B. Mandle; James M. DeFilippis
- Web page: https://patentgrep.com/patent/US20210280118A1

## CPC

- G09G 3/001: {using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background (slide projectors per se G03B23/00 = 42 HP)}
- G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)}
- G02B 5/201: {in the form of arrays}
- G02B 27/141: {using dichroic mirrors}
- G02F 1/133514: {Colour filters}
- G09G 3/3413: {Details of control of colour illumination sources}
- G09G 3/3426: {the different display panel areas being distributed in two dimensions, e.g. matrix}
- G09G 3/346: {based on modulation of the reflection angle, e.g. micromirrors (micromirrors devices per se G02B26/0833)}
- G09G 5/02: characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)}
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- G09G 2320/0666: for control of colour parameters, e.g. colour temperature
- G09G 2340/06: Colour space transformation
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

Systems and methods for a six-primary color system for display. A six-primary color system increases the number of primary colors available in a color system and color system equipment. Increasing the number of primary colors reduces metameric errors from viewer to viewer. The six-primary color system includes Red, Green, Blue, Cyan, Yellow, and Magenta primaries. The systems of the present invention maintain compatibility with existing color systems and equipment and provide systems for backwards compatibility with older color systems.

## Claims

### Claim 1

A system for displaying a six-primary color system, comprising:
a set of image data;
a set of primary color signals, wherein the set of primary color signals corresponds to a set of tristimulus values in XYZ color space;
an image data converter;
a set of Session Description Protocol (SDP) parameters; and
at least one display device;
wherein the at least one display device and the image data converter are in network communication;
wherein the image data converter is operable to create an updated set of primary color signals from the set of tri stimulus values in XYZ color space and a first primary triad, a second primary triad, a third primary triad, and a fourth primary triad;
wherein the set of image data includes a set of saturation data, wherein the set of saturation data is calculated using the updated set of primary color signals;
wherein the set of saturation data is used to create an updated set of hue angles for the updated set of primary color signals, wherein the updated set of hue angles includes inverted hue angles; and
wherein the image data converter is operable to convert the set of image data for display on the at least one display device using the updated set of primary color signals.

### Claim 2 (depends on 1)

The system of claim 1, wherein the first primary triad includes red (R), green (G), and blue (B) primaries, wherein the second primary triad includes G, cyan (C), and B primaries, wherein the third primary triad includes R, yellow (Y), and G primaries, and wherein the fourth primary triad includes R, B, and magenta (M) primaries.

### Claim 3 (depends on 1)

The system of claim 1, wherein the first primary triad includes cyan (C), yellow (Y), and magenta (M) primaries.

### Claim 4 (depends on 1)

The system of claim 1, wherein the image data converter is operable to convert the set of tristimulus values in XYZ color space into the first primary triad, the second primary triad, the third primary triad, and the fourth primary triad.

### Claim 5 (depends on 1)

The system of claim 1, wherein the updated set of primary color signals is defined by the first primary triad, the second primary triad, the third primary triad, and the fourth primary triad.

### Claim 6 (depends on 1)

The system of claim 1, wherein the image data converter is operable to convert the set of tristimulus values in XYZ color space into the first primary triad, the second primary triad, the third primary triad, and the fourth primary triad in any order.

### Claim 7 (depends on 1)

The system of claim 1, wherein the SDP parameters are modifiable, wherein the at least one display device is operable to display the six-primary color system based on the set of image data, and wherein the set of SDP parameters is modified to indicate that the set of image data is being displayed on the at least one display device using the six-primary color system.

### Claim 8 (depends on 1)

The system of claim 1, wherein the image data converter is operable to modulate the updated set of primary color signals according to the at least one display device.

### Claim 9 (depends on 8)

The system of claim 8, wherein a modulating signal applied to the at least one display device depends on characteristics of the at least one display device, wherein the characteristics include gamma characteristics, a luminance, a luminance unity, a visual acuity, a flicker threshold, a contrast, a contrast polarity, a resolution, a refresh rate, a temporal instability, a persistence, a color, and/or reflect characteristics.

### Claim 10 (depends on 1)

The system of claim 1, wherein the updated set of primary signals is determined based on a lower inter-observer color variation, a smoothness of transition from a first primary to a second primary, an ability of the system to minimize contouring, a mapping of out-of-gamut colors to in-gamut colors, and/or at least one multidimensional look-up table.

### Claim 11

A system for displaying a six-primary color system, comprising:
a set of image data;
a set of primary color signals, wherein the set of primary color signals corresponds to a set of tristimulus values in XYZ color space;
an image data converter;
a set of Session Description Protocol (SDP) parameters, wherein the set of SDP parameters is modifiable; and
at least one display device;
wherein the at least one display device and the image data converter are in network communication;
wherein the image data converter is operable to create an updated set of primary color signals from the set of tri stimulus values in XYZ color space and a first primary triad, a second primary triad, a third primary triad, and a fourth primary triad;
wherein the set of image data includes a set of saturation data, wherein the set of saturation data is calculated using the updated set of primary color signals;
wherein the set of saturation data is used to create an updated set of hue angles for the updated set of primary color signals, wherein the updated set of hue angles includes inverted hue angles; and
wherein the image data converter is operable to convert the set of image data for display on the at least one display device using the updated set of primary color signals.

### Claim 12 (depends on 11)

The system of claim 11, wherein the first primary triad includes red (R), green (G), and blue (B) primaries, wherein the second primary triad includes G, cyan (C), and B primaries, wherein the third primary triad includes R, yellow (Y), and G primaries, and wherein the fourth primary triad includes R, B, and magenta (M) primaries.

### Claim 13 (depends on 11)

The system of claim 11, wherein the first primary triad includes cyan (C), yellow (Y), and magenta (M) primaries.

### Claim 14 (depends on 11)

The system of claim 11, wherein the image data converter is operable to convert the set of tri stimulus values in XYZ color space into the first primary triad, the second primary triad, the third primary triad, and the fourth primary triad.

### Claim 15 (depends on 11)

The system of claim 11, wherein the updated set of primary color signals is defined by the first primary triad, the second primary triad, the third primary triad, and the fourth primary triad.

### Claim 16 (depends on 11)

The system of claim 11, wherein the image data converter is operable to modulate the updated set of primary color signals according to the at least one display device.

### Claim 17

A system for displaying a set of image data using a six-primary color system, comprising:
a set of image data;
an image data converter, wherein the image data converter includes a digital interface, wherein the digital interface is operable to encode and decode the set of image data;
a set of Session Description Protocol (SDP) parameters;
an XYZ color space matrix, wherein the XYZ color space matrix corresponds to a set of primary color signals; and
at least one display device;
wherein the at least one display device and the image data converter are in network communication;
wherein the image data converter is operable to convert the set of image data for display on the at least one display device using the XYZ color space matrix and a primary triad, a second primary triad, a third primary triad, and a fourth primary triad, thereby creating an updated set of primary color signals;
wherein the set of image data includes a set of saturation data, wherein the set of saturation data is calculated using the updated set of primary color signals; and
wherein the set of saturation data is used to create an updated set of hue angles for the updated set of primary color signals, wherein the updated set of hue angles includes inverted hue angles.

### Claim 18 (depends on 17)

The system of claim 17, wherein the first primary triad includes cyan (C), yellow (Y), and magenta (M) primaries.

### Claim 19 (depends on 17)

The system of claim 17, wherein the first primary triad includes red (R), green (G), and blue (B) primaries, wherein the second primary triad includes G, cyan (C), and B primaries, wherein the third primary triad includes R, yellow (Y), and G primaries, and wherein the fourth primary triad includes R, B, and magenta (M) primaries.

### Claim 20 (depends on 17)

The system of claim 17, wherein the image data converter is operable to convert the set of image data to a standard color gamut using the XYZ color space matrix.