Lighting apparatus with reduced abrupt brightness changes
地域：
CA
CA San Jose
摘要
A light-emitting apparatus can reduce flicker and retain power efficiency. A method can include driving, by a light emitting element (LEE) driver circuit, first, second, and third LEEs using a pulse width modulation (PWM) driving scheme to generate light of a first color, the first, second, and third LEEs configured to emit different colors, alternating, by the LEE driver circuit, between driving the first, second, and third LEEs using a hybrid driving scheme and the PWM driving scheme, and after alternating between driving the first, second, and third LEEs in the hybrid and PWM driving schemes, driving, by the LEE driver circuit, the first, second, and third LEEs using the hybrid driving scheme.
說明書
Dithering sequence of different patterns and lengths can be employed. A sequence alternating between the source driving scheme (S) (either PWM driving scheme or the hybrid driving scheme) and the target driving scheme (T) (either the hybrid driving scheme or the PWM driving scheme) (e.g., as TSTS . . . TST) and ending on the target driving scheme is effective.
The duration of the step response depends on both the driver and the LED load. The length of the dithering sequence can be adaptive. This can be achieved by hardcoding the sequence per design, by conducting a self-calibration during operation, or by monitoring the change in instantaneous current.
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