# US 11,308,849 B2 · Display lighting systems with circadian effects > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,308,849 B2 - Document ID: US11308849B2 - Status: Granted - Kind: B2 - Application number: 17/068,983 - Filed: 2020-10-13 - Published: 2021-06-10 - Granted: 2022-04-19 - Earliest claimed: 2018-01-11 - Assignees: Ecosense Lighting Inc. - Applicants: Ecosense Lighting Inc. - Inventors: Raghuram L. V. Petluri; Paul Kenneth Pickard; Benjamin Harrison; Shruti Koparkar - Web page: https://patentgrep.com/patent/US11308849B2 ## CPC - G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)} - G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED] - G09G 3/3413: {Details of control of colour illumination sources} - H05B 45/20: Controlling the colour of the light - H05B 45/60: Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED] - G09G 2380/08: Biomedical applications - Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] - 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) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract Display systems for displaying digital content. The display systems have one or more LED-based lighting channels adapted to generate a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode. The circadian-inducing blue light can have a first circadian-stimulating energy characteristic related to the associated first spectral power distributions of light generated in the first operational mode, and the non-circadian-inducing blue light can have a second circadian-stimulating energy characteristic related to the associated second spectral power distribution of light generated in the second operational mode. Disclosure methods of generating digital display content with the display systems described herein. The methods can generate a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode. ## Claims ### Claim 1 A computer display system, comprising: a pixel array; wherein each pixel in the pixel array includes a plurality of sub-pixel color points comprising four different colors, wherein at least two of the four different colors comprise color points each having a peak intensity wavelength between 380 nm and 510 nm, wherein the color points comprise a first color point and a second color point, the first color point and the second color point configured to produce two different colors, wherein the first color point is selected to affect a circadian rhythm of a user by having a first spectral power distribution having a first emission spectrum between greater than 470 nm and less than or equal to 510 nm, wherein the second color point has a second spectral power distribution having a second emission spectrum between 380 nm and 510 nm; wherein the first spectral power distribution and the second spectral power distribution have a circadian-stimulating energy characteristic being a percentage of a spectral power in the first spectral power distribution and the second spectral power distribution, respectively, between a first wavelength value and a second wavelength value, and a processor adapted to select an intensity for each of the first color point and the second color point. ### Claim 2 (depends on 1) The computer display system of claim 1, wherein: the first percentage comprises the percentage of the spectral power between 380 nm and 780 nm in the first spectral power distribution between 440 nm and 490 nm; and the second percentage comprises the percentage of the spectral power between 380 nm and 780 nm in the second spectral power distribution between 440 nm and 490 nm. ### Claim 3 (depends on 2) The computer display system of claim 2, wherein a ratio of the first percentage to the second percentage is between about 13 and about 30. ### Claim 4 (depends on 3) The computer display system of claim 3, wherein the ratio of the first percentage to the second percentage is between about 15 and about 25. ### Claim 5 (depends on 3) The computer display system of claim 3, wherein the ratio of the first percentage to the second percentage is between about 20 and about 25. ### Claim 6 (depends on 3) The computer display system of claim 3, wherein the ratio of the first percentage to the second percentage is between about 20 and about 30. ### Claim 7 (depends on 3) The computer display system of claim 3, wherein the ratio of the first percentage to the second percentage is between about 18 and about 22. ### Claim 8 (depends on 2) The computer display system of claim 2, wherein the first percentage is between about 15% and about 25%. ### Claim 9 (depends on 8) The computer display system of claim 8, wherein the first percentage is between about 16% and about 22%. ### Claim 10 (depends on 2) The computer display system of claim 2, wherein the second percentage is between about 0.85% and about 1.05%. ### Claim 11 (depends on 10) The computer display system of claim 10, wherein the second percentage is between about 0.85% and about 0.95%. ### Claim 12 (depends on 10) The computer display system of claim 10, wherein the second percentage is between about 0.90% and about 0.95%. ### Claim 13 (depends on 1) The computer display system of claim 1, wherein: the first spectral power distribution has a first equivalent melanopic lux (EML) value; and the second spectral power distribution has a second equivalent melanopic lux (EML) value. ### Claim 14 (depends on 13) The computer display system of claim 13, wherein a ratio of the first EML value to the second EML value comprises a ratio between about 2.0 and about 10.0.