# US 9,413,472 B2 · Systems and methods for power management in a beacon > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,413,472 B2 - Document ID: US9413472B2 - Status: Granted - Kind: B2 - Application number: 14/321,104 - Filed: 2014-07-01 - Published: 2015-01-08 - Granted: 2016-08-09 - Earliest claimed: 2013-07-02 - Assignees: Cejay Engineering, LLC - Applicants: Derek Haynes; Guido Albert Lemke - Inventors: Derek Haynes; Guido Albert Lemke - Web page: https://patentgrep.com/patent/US9413472B2 ## CPC - H04B 17/102: {Power radiated at antenna} - F21V 23/00: Arrangement of electric circuit elements in or on lighting devices {(characterised by cooling arrangements F21V29/508)} - G01S 13/78: discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe (G01S13/75, G01S13/79 take precedence) - G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED] - H04B: TRANSMISSION - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - 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) ## Abstract A method for power management in a beacon includes determining a program density of a signaling program; determining an initial driving voltage using the program density; determining a current setting for an emitter using the initial driving voltage; adjusting the initial driving voltage to a start-up voltage; executing the signaling program using the start-up voltage; and adjusting the start-up voltage to a signaling voltage. ## Claims ### Claim 1 A method for power management in a beacon, comprising: determining a program density of a signaling program; determining an initial driving voltage using the program density; determining a current setting for an emitter using the initial driving voltage, the current setting enabling the emitter to repeatedly execute the signaling program for a predetermined amount of time while being powered by a power source; adjusting the initial driving voltage to a start-up voltage based on a first comparison comparing a start-up current through the emitter with the current setting and a second comparison comparing a start-up power source voltage with a minimum power source voltage; executing the signaling program using the start-up voltage; and adjusting the start-up voltage to a signaling voltage based on a third comparison comparing an execution current through the emitter with the current setting and a fourth comparison comparing an execution power source voltage with the minimum power source voltage. ### Claim 2 (depends on 1) The method of claim 1, wherein the start-up voltage causes a current through the emitter to be approximately equal to the current setting and results in a voltage of the power source being greater than the minimum power source voltage. ### Claim 3 (depends on 1) The method of claim 1, wherein the signaling voltage causes a current through the emitter to be approximately equal to the current setting and results in a voltage of the power source being greater than the minimum power source voltage. ### Claim 4 (depends on 1) The method of claim 1, further comprising measuring the current through the emitter during a start-up procedure, the measured current comprising the start-up current; performing the first comparison; measuring the voltage of the power source during the start-up procedure, the measured voltage comprising the start-up power source voltage; and performing the second comparison. ### Claim 5 (depends on 1) The method of claim 1, further comprising measuring the current through the emitter during execution of the signaling program, the measured current comprising the execution current; storing the measured current; performing the third comparison; measuring the voltage of the power source during execution of the signaling program, the measured voltage comprising the execution power source voltage; storing the measured voltage; and performing the fourth comparison. ### Claim 6 (depends on 1) The method of claim 1, further comprising determining a power level of the emitter based on an energy capacity of the power source, the predetermined amount of time, a steady state power consumption level of the beacon, and the program density. ### Claim 7 (depends on 1) The method of claim 1, wherein the initial driving voltage is determined using the power level of the emitter. ### Claim 8 (depends on 1) The method of claim 1, wherein determining the program density further comprises sampling the signaling program using a predetermined sampling rate; determining a number of samples having a value corresponding to an on-state of the emitter; and dividing the determined number of samples by a total number of samples. ### Claim 9 (depends on 1) The method of claim 1, wherein the emitter repeatedly executes the signaling program after a first execution and until an end of the predetermined amount of time while being powered by the power source. ### Claim 10 (depends on 9) The method of claim 9 further comprising, for each of the repeated executions of the signaling program, setting a second driving voltage to be supplied to the emitter during the repeated execution of the signaling program to a voltage equal to an adjusted voltage obtained during a previous execution of the signaling program; supplying the second driving voltage to the emitter during the repeated execution of the signaling program; and adjusting the second driving voltage to a second signaling voltage based on a fifth comparison comparing a repeated execution current through the emitter with the current setting and a sixth comparison comparing a repeated execution power source voltage with the minimum power source voltage. ### Claim 11 (depends on 10) The method of claim 10, wherein the second signaling voltage causes a current through the emitter to be approximately equal to the current setting and results in a voltage of the power source being greater than the minimum power source voltage. ### Claim 12 (depends on 10) The method of claim 10 further comprising measuring the current through the emitter during the repeated execution, the measured current comprising the repeated execution current; storing the measured current; performing the fifth comparison; measuring the voltage of the power source during the repeated execution, the measured voltage comprising the repeated execution power source voltage; storing the measured voltage; and performing the sixth comparison. ### Claim 13 (depends on 1) The method of claim 1, wherein the beacon is a synchro beacon.