# US 2009/0262129 A1 · Extending the gamut color generation in a display > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2009/0262129 A1 - Document ID: US20090262129A1 - Status: Published application - Kind: A1 - Application number: 12/420,979 - Filed: 2009-04-09 - Published: 2009-10-22 - Earliest claimed: 2002-02-26 - Assignees: Uni-Pixel Displays, Inc. - Inventors: Martin G. Selbrede; Lynn Essman; Dan Van Ostrand - Web page: https://patentgrep.com/patent/US20090262129A1 ## CPC - G09G 3/3413: {Details of control of colour illumination sources} - G02B 26/02: for controlling the intensity of light {(G02B26/004 takes precedence)} - G06F 3/0421: {by interrupting or reflecting a light beam, e.g. optical touch-screen} - G09G 3/3433: {using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices (using liquid crystal devices G09G3/36; using electrochromic devices G09G3/38)} - H04N 9/315: {Modulator illumination systems (general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20)} - G06F 2203/04109: FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location - G09G 3/2018: {by time modulation using two or more time intervals} - G09G 3/2025: {the sub-frames having all the same time duration} - G09G 3/2081: {with combination of amplitude modulation and time modulation (space and time error diffusion G09G3/2066)} - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2310/0235: Field-sequential colour display - G09G 2320/0633: by amplitude modulation of the brightness of the illumination source - G09G 2360/142: the light being detected by light detection means within each pixel - G09G 2360/148: the light being detected by light detection means within each pixel - 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 - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract 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. ## Claims ### Claim at position 1 1-14. (canceled) ### Claim 15 A method for extending a color gamut comprising: 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 said tristimulus color space triangle and light sources lying outside said tristimulus color space triangle; and adding a non-tristimulus vertex to construct an extended-gamut polygon. ### Claim 16 (depends on 15) The method as recited in claim 15, wherein said one or more primary colors added to said RGB system lie outside said tristimulus color space triangle but within a CIE (International Commission on Illumination) color space. ### Claim 17 (depends on 16) The method as recited in claim 16, wherein said non-tristimulus vertex is added to construct an extended-gamut polygon in said CIE color space. ### Claim 18 (depends on 16) The method as recited in claim 16, wherein said light emitted by both light sources lying inside said tristimulus color space triangle and light sources lying outside said tristimulus color space triangle but within a CIE (International Commission on Illumination) color space is modulated by a plurality of pixel structures. ### Claim 19 (depends on 18) The method as recited in claim 18, wherein a frequency and a duration of pulses of said plurality of pixel structures are temporally proportioned to and synchronized with the number of light sources lying outside said tristimulus color space triangle but within said CIE color space. ### Claim 20 (depends on 19) The method as recited in claim 19, 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. ### Claim 21 (depends on 19) The method as recited in claim 19, wherein a pulse width for each primary color lying inside and outside said tristimulus color space triangle but within said CIE color space is of identical duration. ### Claim 22 (depends on 15) The method as recited in claim 15, wherein said non-tristimulus vertex is added by adding one or more light sources that emit a target color defined at said non-tristimulus vertex. ### Claim 23 (depends on 15) The method as recited in claim 15, wherein said non-tristimulus vertex is added by generating a target color defined at said non-tristimulus vertex by composition of dissimilar surrogate light sources that chromatically sum up to said target color based on their weighted intensities. ### Claim 24 A method for extending a color gamut comprising: adding one or more primary colors lying outside a tristimulus color space triangle to a Red, Green, Blue (RGB) system; driving both light sources of primary colors lying inside said tristimulus color space triangle and light sources of said one or more primary colors lying outside said tristimulus color space triangle to provide light to a plurality of pixels; modulating light emitted by both light sources lying inside said tristimulus color space triangle and light sources lying outside said tristimulus color space triangle; and adding a non-tristimulus vertex to construct an extended-gamut polygon. ### Claim 25 (depends on 24) The method as recited in claim 24, wherein said one or more primary colors added to said RGB system lie outside said tristimulus color space triangle but within a CIE (International Commission on Illumination) color space. ### Claim 26 (depends on 25) The method as recited in claim 25, wherein said non-tristimulus vertex is added to construct an extended-gamut polygon in said CIE color space. ### Claim 27 (depends on 25) The method as recited in claim 25, wherein said light emitted by both light sources lying inside said tristimulus color space triangle and light sources lying outside said tristimulus color space triangle but within a CIE (International Commission on Illumination) color space is modulated by said plurality of pixels. ### Claim 28 (depends on 27) The method as recited in claim 27, wherein a frequency and a duration of pulses of said plurality of pixels are temporally proportioned to and synchronized with the number of light sources lying outside said tristimulus color space triangle but within said CIE color space. ### Claim 29 (depends on 28) The method as recited in claim 28, 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. ### Claim 30 (depends on 28) The method as recited in claim 28, wherein a pulse width for each primary color lying inside and outside said tristimulus color space triangle but within said CIE color space is of identical duration. ### Claim 31 (depends on 24) The method as recited in claim 24, wherein said non-tristimulus vertex is added by adding one or more light sources that emit a target color defined at said non-tristimulus vertex. ### Claim 32 (depends on 24) The method as recited in claim 24, wherein said non-tristimulus vertex is added by generating a target color defined at said non-tristimulus vertex by composition of dissimilar surrogate light sources that chromatically sum up to said target color based on their weighted intensities. ### Claim 33 A display comprising: a plurality of pixels on said display; and a plurality of drive lamps for driving light sources to provide light to said plurality of pixels, wherein said plurality of drive lamps are driven to cause each of said plurality of pixels to generate a color palette including primary colors lying inside a tristimulus color space triangle and one or more primary colors lying outside said tristimulus color space triangle, wherein said color palette is expanded by modulating light emitted by both light sources lying inside said tristimulus color space triangle and light sources lying outside said tristimulus color space triangle, wherein a non-tristimulus vertex is added to construct an extended-gamut polygon. ### Claim 34 (depends on 33) The display as recited in claim 33, wherein said one or more primary colors added to said RGB system lie outside said tristimulus color space triangle but within a CIE (International Commission on Illumination) color space.