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Lighting apparatus with reduced abrupt brightness changes

專利號
US11510302B2
公開日期
2022-11-22
申請人
Lumileds LLC(US CA San Jose)
發(fā)明人
Yifeng Qiu; Alan Andrew McReynolds
IPC分類
H05B45/20; H05B45/325; H05B47/17
技術(shù)領(lǐng)域
lees,driving,scheme,pwm,color,hybrid,colors,lee,driver,can
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

FIG. 1 illustrates, by way of example, a diagram of an embodiment of a color space divided into hybrid 108 and PWM 102, 104, 106 driving scheme regions. In the embodiment of FIG. 1, the color points are realized by a controller driving LEEs using either a hybrid 108 driving scheme or a PWM 102, 104, 106, driving scheme. Since the hybrid 108 driving scheme is more energy efficient, if the color point can be generated using the hybrid 108 driving scheme, then improved energy efficiency can be realized by driving the color point using the hybrid driving scheme. The hybrid 108 driving scheme, however, cannot be used to produce some colors that can be produced using the PWM 102, 104, 106 driving scheme.

權(quán)利要求

1
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