# US 11,305,091 B2 · Circadian rhythm management apparatus and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,091 B2 - Document ID: US11305091B2 - Status: Granted - Kind: B2 - Application number: 16/525,183 - Filed: 2019-07-29 - Published: 2020-07-23 - Granted: 2022-04-19 - Earliest claimed: 2019-01-23 - Assignees: Kookmin University Industry Academy Cooperation Foundation - Applicants: Kookmin University Industry Academy Cooperation Foundation - Inventors: Hyun Sun Mo; Young Rag Do; Dae Jeong Kim; Dae Hwan Kim; Sung Yeon Jang; In Hwan Jung; Dong Myung Kim; Seong Jin Choi; Sanggyu Yim; Hyung Min Kim; Sun Woong Choi; Gu Min Jeong; Seung Min Lee - Web page: https://patentgrep.com/patent/US11305091B2 ## CPC - A61M 21/00: Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis - A61M 21/02: for inducing sleep or relaxation, e.g. by direct nerve stimulation, hypnosis, analgesia (for massage A61H; electrotherapy A61N, e.g. applying alternating or intermittent electric currents for producing anaesthesia A61N1/36021) - A61N 5/0618: {Psychological treatment} - A61B 5/01: Measuring temperature of body parts {; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue} (clinical contact thermometers G01K13/20) - A61B 5/0205: Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition - A61B 5/024: Measuring pulse rate or heart rate - A61B 5/165: {Evaluating the state of mind, e.g. depression, anxiety} - A61B 5/4815: {Sleep quality} - A61B 5/4836: {Diagnosis combined with treatment in closed-loop systems or methods (A61B5/0036 takes precedence)} - A61B 5/486: {Biofeedback (using electroencephalography [EEG] A61B5/375)} - A61B 2560/0242: adapted to measure environmental factors, e.g. temperature, pollution - A61M 2021/0044: {by the sight sense} - A61M 2205/3306: Optical measuring means - A61M 2205/3368: Temperature - A61M 2205/3553: remote, e.g. between patient's home and doctor's office - A61M 2205/3592: using telemetric means, e.g. radio or optical transmission - A61M 2209/088: on the body - A61M 2230/04: Heartbeat characteristics, e.g. ECG, blood pressure modulation - A61M 2230/06: Heartbeat rate only - A61M 2230/50: Temperature - A61N 2005/0626: {Monitoring, verifying, controlling systems and methods} - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Disclosed are an apparatus and a system for managing circadian rhythm. The apparatus includes an illuminance measuring portion which measures a bio illuminance value of external light using a circadian lambda filter which passes the external light along according to a circadian rhythm sensitivity curve and a visual lambda filter which passes the external light along according to a visual sensitivity curve, a controller which outputs a control signal for reinforcing a user's circadian rhythm on the basis of the bio illuminance value, and a circadian rhythm reinforcing portion which emits light of a circadian wavelength band toward the user according to the control signal. ## Claims ### Claim 1 A circadian rhythm management apparatus comprising: an illuminance measuring portion which measures a bio illuminance value of external light using a circadian lambda filter which passes the external light along according to a circadian rhythm sensitivity curve and a visual lambda filter which passes the external light along according to a visual sensitivity curve; a controller which outputs a control signal which reinforces a user's circadian rhythm on the basis of the bio illuminance value, wherein the illuminance measuring portion comprises a photo sensor that senses and converts the external light, which has passed through the circadian lambda filter, into a circadian wavelength signal and senses and converts the external light, which has passed through the visual lambda filter, into a visual wavelength signal; an illuminance calculator which calculates a ratio between the circadian wavelength signal and the visual wavelength signal, calculates a circadian action factor by applying a ratio between the circadian wavelength signal and the visual wavelength signal to a circadian action function which varies according to the visual wavelength signal, and calculates the bio illuminance value on the basis of the circadian action factor; and a function storage which stores a plurality of circadian action functions which vary according to each of certain sections of the visual wavelength signal. ### Claim 2 (depends on 1) The circadian rhythm management apparatus of claim 1, further comprising a circadian rhythm reinforcer which emits light of a circadian wavelength band toward a user according to the control signal. ### Claim 3 (depends on 2) The circadian rhythm management apparatus of claim 2, wherein the circadian rhythm reinforcer comprises: a light source which outputs light of the circadian wavelength band; and a light source driving portion which receives the control signal and drives the light source. ### Claim 4 (depends on 1) The circadian rhythm management apparatus of claim 1, wherein the illuminance calculator further comprises a function caller which calls a function corresponding to the visual wavelength signal among the plurality of circadian action functions stored in the function storage. ### Claim 5 (depends on 1) The circadian rhythm management apparatus of claim 1, wherein the circadian action function is a function which defines a relation between the circadian action factor and the ratio between the circadian wavelength signal and the visual wavelength signal, and wherein the ratio between the circadian wavelength signal and the visual wavelength signal becomes an independent variable, and the circadian action factor becomes a dependent variable. ### Claim 6 (depends on 1) The circadian rhythm management apparatus of claim 1, wherein the circadian action factor is proportional to the ratio between the circadian wavelength signal and the visual wavelength signal. ### Claim 7 (depends on 1) The circadian rhythm management apparatus of claim 1, wherein the illuminance calculator comprises a visual illuminance calculator which calculates a visual illuminance value of the external light on the basis of the visual wavelength signal. ### Claim 8 (depends on 7) The circadian rhythm management apparatus of claim 7, wherein the bio illuminance value is calculated by multiplying the circadian action factor by the visual illuminance value. ### Claim 9 (depends on 1) The circadian rhythm management apparatus of claim 1, wherein the control signal is a signal related to light intensity and light emitting time of the circadian wavelength band. ### Claim 10 (depends on 1) A circadian rhythm management system comprising: the circadian rhythm management apparatus of claim 1; and a server which receives and analyzes at least one of a bio illuminance value, bio data of a user, surrounding environment data of the user and generates a control signal by analyzing the same. ### Claim 11 (depends on 10) The circadian rhythm management system of claim 10, further comprising a patch which is configured to be attached to a body of the user and measures and outputs the bio data of the user to the server. ### Claim 12 (depends on 10) The circadian rhythm management system of claim 10, further comprising a sensor which is configured to be disposed near the user and measures and outputs the surrounding environment data of the user to the server. ### Claim 13 (depends on 10) The circadian rhythm management system of claim 10, further comprising a user terminal which displays at least one of the bio illuminance value and a visual illuminance value, transmits the bio illuminance value to the server, and transmits the control signal generated by the server to a controller. ### Claim 14 (depends on 10) The circadian rhythm management system of claim 10, wherein the bio data comprises at least one of heart rate data, electrocardiogram data, and core body temperature data, and wherein the surrounding environment data comprises at least one of temperature data and humidity data.