Extending the gamut color generation in a display
View Patent ↗In a display system, a color gamut of the displayed images is extended by adding one or more primary colors lying outside a tristimulus color space triangle to a Red, Green, Blue (RGB) system, modulating light emitted by both light sources lying inside the tristimulus color space triangle and light sources lying outside the tristimulus color space triangle, and adding a non-tristimulus vertex to construct an extended-gamut polygon. The display system adds one or more primary colors to the RGB system, which lie outside the tristimulus color space triangle but within a CIE (International Commission on Illumination) color space.
1. A method for extending a color gamut comprising:
generating red, green and blue light using respective first light sources, said red, green and blue light having a color space represented by a tristimulus color space triangle;
adding light of an additional color located outside said tristimulus color space triangle to said red, green and blue light to provide light having a color space represented by an extended-gamut polygon having a non-tristimulus vertex, said adding comprising generating said light of said additional color using a second light source; and
modulating said light emitted by both said first light sources lying inside said tristimulus color space triangle and said light source lying outside said tristimulus color space triangle;
wherein said generating said light of said additional color comprises combining light from light sources generating light of colors that chromatically sum to said additional color based on their weighted intensities.
2. The method as recited in claim 1 , wherein said additional color is located outside said tristimulus color space triangle but within a CIE International Commission on Illumination) color space.
3. The method as recited in claim 2 , wherein said non-tristimulus vertex added to construct said extended-gamut polygon is located within said CIE color space.
4. The method as recited in claim 2 , wherein said modulating comprises modulating said light emitted by both said first light sources located inside said tristimulus color space triangle and said second light source located outside said tristimulus color space triangle but within said CIE (International Commission on Illumination) color space using pixel structures.
5. The method as recited in claim 4 , wherein:
said adding comprises adding light of one or more additional colors located outside said tristimulus color space triangle to said red, green and blue light to provide said light having a color space represented by an extended-gamut polygon having a respective non-tristimulus vertex corresponding to each of said additional colors; and
a frequency and a duration of pulses of said pixel structures are temporally proportioned to and synchronized with the number of additional colors of light located outside said tristimulus color space triangle but within said CIE color space.
6. The method as recited in claim 5 , wherein at least one pulse width of a first of said colors is not of identical duration to at least one pulse width of a second of said colors, wherein said first and second colors are located within said CIE color space.
7. The method as recited in claim 5 , wherein a pulse width for each color located inside and outside said tristimulus color space triangle but within said CIE color space is of identical duration.
8. A method for extending a color gamut comprising:
generating red, green and blue light using respective first light sources, said red, green and blue light having a color space represented by a tristimulus color space triangle;
adding light of an additional color located outside said tristimulus color space triangle to said red, green and blue light to provide light having a color space represented by an extended-gamut polygon having a non-tristimulus vertex, said adding comprising generating said light of said additional color using a second light source;
driving both said first light sources lying inside said tristimulus color space triangle and said second light source lying outside said tristimulus color space triangle to provide light to a plurality of pixels, wherein a frequency and a duration of light pulses, from said first light sources, are temporally proportioned to and synchronized with said second light source; and
modulating said light emitted by both said first light sources lying inside said tristimulus color space triangle and said second light source lying outside said tristimulus color space triangle.
9. The method as recited in claim 8 , wherein said additional color is located outside said tristimulus color space triangle but within a CIE (International Commission on Illumination) color space.
10. The method as recited in claim 9 , wherein said non-tristimulus vertex added to construct said extended-gamut polygon is located within said CIE (International Commission on Illumination) color space.
11. The method as recited in claim 9 , wherein said modulating comprises modulating, by pixels, said light emitted by both said first light sources located inside said tristimulus color space triangle and said second light source located outside said tristimulus color space triangle but within said CIE (International Commission on Illumination) color space.
12. The method as recited in claim 9 , wherein at least one pulse width of a first primary color is not of identical duration to at least one pulse width of a second primary color, wherein said first and second primary colors lie within said CIE color space.
13. The method as recited in claim 9 , wherein a pulse width for each primary color lying within said CIE color space is of identical duration.
14. The method as recited in claim 8 , wherein said generating said light of said additional color comprises combining light from light sources generating light of colors that chromatically sum up to said additional color based on their weighted intensities.