1. A display system comprising a display panel substantially comprising a subpixel repeating group with at least four primary colored subpixels representing different colors from each other, said display system further receiving input image data specified in a first color space and outputting image data specified in a second color space, said display system further comprising:
a gamut mapping module configured to map an input image color value of said input image data specified in said first color space to an image color value specified in said second color space; said gamut mapping module clamping out-of-gamut colors using at least first and second clamping systems, said first and second clamping systems producing first and second clamped values; and
a weighting module producing a resulting clamped value from said first and said second clamped values.
2. The display system of claim 1, wherein said first clamping system is a clamp-to-black system and second clamping system is a clamp-to-luminance system.
3. The display system of claim 1, wherein said first clamping system is a clamp-to-black system and second clamping system clamp-to-white system.
4. The display system of claim 1, wherein said weighting module produces a fixed percentage of said first and said second clamped values.
5. The display system of claim 1, wherein said weighting module produces an average of said first and said second clamped values.
6. The display system of claim 1, wherein said weighting module produces a weighted average comprising a function of said input image color value.
7. The display system of claim 6, wherein said function of the input image color value is one of a function of saturation, a function of brightness and a function of hue of the input image color value.
8. The display system of claim 1, wherein said function of the input image color value is a function of the amount that a color of said input image data is out-of-gamut.
9. The display system of claim 1, wherein said at least four primary colored subpixels comprises a first colored subpixel representing a red color, a second colored subpixel representing a green color, a third colored subpixel representing a blue color and a fourth colored subpixel representing at least one of a white color, a yellow color, a cyan color and a magenta color.
10. A method for displaying an image in a display system comprising a display panel substantially comprising a subpixel repeating group with at least four primary colored subpixels representing different colors, the method comprising:
producing a first filtered value of an input image color value of input image data using a first filtering method;
producing a second filtered value of the input image color value of the input image data using a second filtering method; and
producing a combined filtered value from the first and second filtered values.
11. The method of claim 10, wherein the combined filtered value is a weight average of the first and second filtered values.
12. The method of claim 10, wherein the input image color value comprises at least one of a red color value, a green color value, a blue color value and a white color value.
13. The method of claim 10, wherein the first filtering method is metamer-filtering.
14. The method of claim 13, wherein the second filtering method is cross-luma-filtering.
15. The method of claim 10, further comprising:
adding the combined value to the input image color value.
16. A display system configured to receive input image data specified in a first color space and configured to output image data specified in a second color space, said display system further comprising:
a display panel comprising a subpixel repeating group; and
an adjustable gamut mapping module configured to receive parameters based upon an arrangement of said subpixels in said subpixel repeating group;
wherein said subpixel repeating group comprises at least four colored subpixels having different colors from each other and said parameters are based on the ratio of the maximum luminosity of a first colored subpixel to the sum of the maximum output luminosity of a second colored subpixel, a third colored subpixel and a fourth colored subpixel.
17. The display system of claim 16, wherein said first colored subpixel represents one of a white color, a yellow color, a cyan color and a magenta color.
18. The display system of claim 16, wherein said second to fourth colored subpixels represent a red color, a green color and a blue color.
19. The display system of claim 16, wherein said parameters are loaded into registers in a hardware.
20. The display system of claim 16, wherein said parameters are selected from a LUT.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A process for removing heteroatoms and wax from a distillate fuel feed comprises (i) hydrotreating the feed in one or more hydrotreating reaction stages to produce a hydrotreated fuel reduced in heteroatoms, (ii) separating said treated fuel into a light and a heavy fraction, and (iii) dewaxing said heavy fraction in one or more dewaxing reaction stages, to improve one or more low temperature properties.
2. A process according to claim 1 wherein said feed and hydrotreated heavy fraction is liquid.
3. A process according to claim 2 wherein said heavy fraction comprises less than about 80 vol. % of said feed on a liquid basis.
4. A process according to claim 3 wherein said light faction is separated from said hydrotreated fuel as vapor.
5. A process according to claim 4 wherein unreacted hydrogen from said dewaxing is used for said hydrotreating.
6. A process according to claim 5 wherein said hydrotreated heavy fraction liquid is stripped to remove dissolved heteroatom compounds before said dewaxing.
7. A process according to claim 6 wherein at least one said dewaxing stage is in a hydrotreating reactor in which there are one or more said hydrotreating stages.
8. A process according to claim 7 wherein at least a portion of said separated light fraction is condensed to liquid and recombined with at least a portion of said dewaxed heavy fraction liquid.
9. A process according to claim 8 wherein said heavy fraction comprises less than about 60 vol. % of said feed on a liquid basis.
10. A process for removing heteroatoms and wax from a distillate fuel feed comprises (a) passing hydrogen and a wax and heteroatom-containing distillate fuel feed into one or more hydrotreating stages, at reaction conditions effective for the feed and hydrogen to react in the presence of a hydrotreating catalyst, to produce a feed reduced in heteroatoms, (b) separating the heteroatom-reduced feed into a light fraction and a heavy fraction liquid, and (c) passing the separated heavy fraction liquid and hydrogen into one or more dewaxing reaction stages, at reaction conditions effective for the hydrogen to react with the heavy fraction in the presence of a dewaxing catalyst, to improve one or more low of its low temperature properties.
11. A process according to claim 10 wherein said hydrotreating reaction conditions vaporize at least most of said light fraction, to produce a hydrotreated light fraction vapor and a hydrotreated heavy fraction liquid and wherein said vapor is separated from said liquid.
12. A process according to claim 11 wherein the cut point separating said heavy and light fractions is in the range of from about 450 to about 580\xb0 F. (about 232 to about 304\xb0 C.).
13. A process according to claim 12 wherein said hydrotreated heavy fraction liquid is stripped to remove dissolved heteroatom compounds before said dewaxing.
14. A process according to claim 13 wherein said heavy fraction comprises less than about 80 vol. % of said feed on a liquid basis.
15. A process according to claim 14 wherein unreacted hydrogen from said dewaxing is used for said hydrotreating.
16. A process according to claim 15 wherein said hydrotreated heavy fraction liquid is stripped to remove dissolved heteroatom compounds before said dewaxing.
17. A process according to claim 16 wherein said one or more dewaxing stages have been added to an existing hydroteating facility.
18. A process according to claim 17 wherein at least a portion of said separated light fraction is condensed to liquid and recombined with at least a portion of said dewaxed heavy fraction liquid.
19. A process according to claim 17 wherein said combined light and heavy fractions are stripped.
20. A process according to claim 19 wherein said recombined light and heavy fractions and said hydrotreated heavy liquid fraction are stripped with a stripping gas in separate stages in a single stripper and wherein said gas first strips said dewaxed product and then said heavy liquid prior to its being dewaxed.
21. A distillate fuel hydrotreating process comprising (a) adding one or more catalytic dewaxing stages to a distillate fuel hydrotreating facility comprising one or more hydrotreating stages, (b) passing hydrogen and a wax and heteroatom-containing distillate fuel feed into said one or more hydrotreating stages in said facility, at reaction conditions effective for said feed and hydrogen to react in the presence of a hydrotreating catalyst, to (i) produce a feed reduced in heteroatoms and (ii) vaporize at least a portion of the lighter feed components to produce a light fraction vapor and a heavy fraction liquid, (c) separating said heavy fraction liquid from said light fraction vapor, and (d) passing said heavy fraction liquid and hydrogen into said one or more dewaxing reaction stages, at reaction conditions effective for said hydrogen to react with said heavy fraction in the presence of a dewaxing catalyst, and improve one or more low temperature properties.