Invention Grant
- Patent Title: Stochastic frequency pulse modulation for light-emitting diode drivers
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Application No.: US17174704Application Date: 2021-02-12
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Publication No.: US11564296B2Publication Date: 2023-01-24
- Inventor: Isaac Molina Hernandez
- Applicant: Analog Devices International Unlimited Company
- Applicant Address: IE Limerick
- Assignee: Analog Devices International Unlimited Company
- Current Assignee: Analog Devices International Unlimited Company
- Current Assignee Address: IE Limerick
- Agency: Akona IP PC
- Main IPC: H05B45/325
- IPC: H05B45/325 ; H05B45/10

Abstract:
Systems and methods that enable LED drivers to generate drive signals by implementing a modulation technique referred to herein as “stochastic frequency pulse modulation” (SFPM) are disclosed. The SFPM is based on randomly increasing or decreasing, during every cycle of a drive signal, the amount of time the drive signal is high or low, tracking the deviation of the total amount of time (i.e., for multiple cycles) that the drive signal is high or low from what it should be to provide to a LED a target average power dictated by a target dimming level, and using the tracking to set limits of ranges from which the durations of the time periods when the drive signal is high or low may be randomly selected.
Public/Granted literature
- US20220264719A1 STOCHASTIC FREQUENCY PULSE MODULATION FOR LIGHT-EMITTING DIODE DRIVERS Public/Granted day:2022-08-18
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