# US 12,004,281 B2 · Light fixture system with high-resolution dimming > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,281 B2 - Document ID: US12004281B2 - Status: Granted - Kind: B2 - Application number: 18/333,742 - Filed: 2023-06-13 - Published: 2023-10-05 - Granted: 2024-06-04 - Earliest claimed: 2021-11-12 - Assignees: Harman Professional Denmark ApS - Applicants: Harman Professional Denmark Aps - Inventors: Kasper Nielsen; Martin Degn Kristensen - Web page: https://patentgrep.com/patent/US12004281B2 ## CPC - H05B 47/155: Coordinated control of two or more light sources - H05B 45/10: Controlling the intensity of the light - H05B 45/325: Pulse-width modulation [PWM] - H05B 45/327: Burst dimming - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A light fixture includes light sources arranged in groups that each include one or more light sources. Each of the groups is repeatedly switched on and off according to a repeating pattern that includes at least three different combinations of which of the groups is switched on and which is switched off. A moving average of an intensity of one or more of the groups is substantially constant within a period of time spanning 10 seconds or more, wherein the moving average is based on a sample period of 1 second or less. A moving average of a total intensity of all of the groups is substantially constant within a period of time spanning 10 seconds or more, wherein the moving average is based on a sample period of 1 second or less. A period of time before the repeating pattern repeats is equal to or less than 1/10 second. ## Claims ### Claim 1 A method of operating a light fixture comprising a plurality of light sources arranged in a plurality of groups, wherein each group comprises one or more light sources, the method comprising: controlling the plurality of groups so that each of the groups is repeatedly switched on and off according to a repeating pattern, the repeating pattern including at least three different combinations of which of the plurality of groups is switched on and which of the plurality of groups is switched off, wherein a moving average of an intensity of one or more of the groups is substantially constant within a period of time spanning 10 seconds or more, wherein the moving average is based on a sample period equal to or less than 1 second, wherein a moving average of a total intensity of all of the groups is substantially constant within a period of time spanning 10 seconds or more, wherein the moving average is based on a sample period equal to or less than 1 second, and wherein a period of time before the repeating pattern repeats is equal to or less than 1/10 s. ### Claim 2 (depends on 1) The method of claim 1, wherein: in a first combination of the repeating pattern, one or more groups are switched on and other one or more groups are switched off; in a second combination of the repeating pattern, one or more of the groups which are switched on in the first combination are switched off and one or more of the groups switched off in the first combination are switched on; and in a third combination of the repeating pattern, one or more of the groups which are switched on in the second combination are switched off and one or more of the groups switched off in the second combination are switched on. ### Claim 3 (depends on 1) The method of claim 1, wherein the period of time before the repeating pattern repeats is equal to or less than 1/50 s. ### Claim 4 (depends on 1) The method of claim 1, wherein which of the plurality of groups is switched on is different for each combination of the repeating pattern. ### Claim 5 (depends on 1) The method of claim 1, wherein each of the plurality of groups that is switched on in a first combination of the repeating pattern are switched on with a variable intensity that is less than 50% of a maximum intensity. ### Claim 6 (depends on 1) The method of claim 1, wherein each of the plurality of groups that is switched on in a first combination of the repeating pattern are switched on with a variable intensity that is a minimum intensity. ### Claim 7 (depends on 1) The method of claim 1, wherein in each combination of the repeating pattern, at least one of the plurality of groups is switched off. ### Claim 8 (depends on 1) The method of claim 1, wherein each combination of the repeating pattern is maintained for a same duration. ### Claim 9 (depends on 1) The method of claim 1, wherein groups within the plurality of groups are out-of-phase with each other. ### Claim 10 (depends on 1) The method of claim 1, further comprising controlling an intensity of each group of the plurality of groups via pulse-width modulation. ### Claim 11 (depends on 10) The method of claim 10, wherein a total intensity of the plurality of groups is substantially constant across regular intervals of the pulse-width modulation. ### Claim 12 A light fixture system comprising: a light fixture comprising: a plurality of light sources arranged in a plurality of groups, wherein each group comprises one or more light sources, and a controller, wherein according to at least one setting of the light fixture, the controller is configured to control the plurality of groups so that each of the groups is repeatedly switched on and off according to a repeating pattern, the repeating pattern including at least three different combinations of which of the plurality of groups is switched on and which of the plurality of groups is switched off, wherein a moving average of an intensity of one or more of the groups is substantially constant within a period of time spanning 10 seconds or more, wherein the moving average is based on a sample period equal to or less than 1 second, wherein a moving average of a total intensity of all of the groups is substantially constant within a period of time spanning 10 seconds or more, wherein the moving average is based on a sample period equal to or less than 1 second, and wherein a period of time before the repeating pattern repeats is equal to or less than 1/10 s. ### Claim 13 (depends on 12) The light fixture system of claim 12, wherein which of the plurality of groups is switched on is different for each combination of the repeating pattern. ### Claim 14 (depends on 12) The light fixture system of claim 12, wherein each of the plurality of groups that is switched on in a first combination of the repeating pattern are switched on with a variable intensity that is less than 50% of a maximum intensity. ### Claim 15 (depends on 12) The light fixture system of claim 12, wherein each of the plurality of groups that is switched on in a first combination of the repeating pattern are switched on with a variable intensity that is a minimum intensity. ### Claim 16 (depends on 12) The light fixture system of claim 12, wherein in each combination of the repeating pattern, at least one of the plurality of groups is switched off. ### Claim 17 (depends on 12) The light fixture system of claim 12, wherein the light fixture is a moving head. ### Claim 18 (depends on 12) The light fixture system of claim 12, wherein the plurality of light sources are capable of delivering in total at least 5 klm. ### Claim 19 (depends on 12) The light fixture system of claim 12, wherein a luminance of each light source of the plurality of light sources is above 250 lm/mm2. ### Claim 20 A non-transitory computer readable medium storing instructions that, when executed by a controller of a light fixture system comprising a light figures having a plurality of light sources arranged in a plurality of groups, wherein each group comprises one or more light sources, configure the controller to perform the steps of: controlling the plurality of groups so that each of the groups is repeatedly switched on and off according to a repeating pattern, the repeating pattern including at least three different combinations of which of the plurality of groups is switched on and which of the plurality of groups is switched off, wherein a moving average of an intensity of one or more of the groups is substantially constant within a period of time spanning 10 seconds or more, wherein the moving average is based on a sample period equal to or less than 1 second, wherein a moving average of a total intensity of all of the groups is substantially constant within a period of time spanning 10 seconds or more, wherein the moving average is based on a sample period equal to or less than 1 second, and wherein a period of time before the repeating pattern repeats is equal to or less than 1/10 s.