Patent ID: 11943850
Assignee: SIGNIFY HOLDING B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. An LED driving method, comprising:
receiving a current level setting;
during start-up, overriding, via an override arrangement, the current level setting to a default current level;
driving the default current level through a parallel combination of an LED arrangement and an output capacitor;
sensing using a current sensor to indicate when current flows through the LED arrangement;
deactivating, via a deactivating transistor, the override function in response to the sensing wherein a control terminal voltage of the transistor is set by the sensor; and
after deactivation, driving the received current level setting through the parallel combination of the LED arrangement and the output capacitor,
wherein the current sensor is coupled in series with the LED arrangement and wherein the series arrangement of the current sensor and the LED arrangement is coupled in parallel with an output capacitor wherein the default current level is a maximum current level setting
wherein the override arrangement comprises a circuit having a pull up transistor for pulling up the control signal to a default voltage when turned on, and isolating the default voltage from the control signal when turned off, and wherein the deactivating transistor when turned on, turns off the pull up transistor.