发明名称 |
Led controller with de-flicker function and led de-flicker circuit and method thereof |
摘要 |
The present invention discloses an LED controller with de-flicker function and an LED de-flicker circuit and method thereof. The LED controller includes: a duty ratio calculation circuit for receiving a pulse width modulation (PWM) signal and generating a duty input signal, indicating a digital duty ratio of the PWM signal; an LED de-flicker circuit for receiving the duty input signal and generating a duty output signal wherein a noise in the duty input signal is filtered; and a dimming circuit for receiving the duty output signal and generating a dimming signal to control an LED circuit; wherein the duty output signal remains unchanged when the variation of the duty input signal is not larger than a hysteresis threshold, and the duty output signal follows the duty input signal when the variation of the duty input signal is larger than the hysteresis threshold. |
申请公布号 |
US2012013265(A1) |
申请公布日期 |
2012.01.19 |
申请号 |
US20100927281 |
申请日期 |
2010.11.10 |
申请人 |
YANG SHEI-CHIE;LIN SHUI-MU;HSIAO CHUAN-YO;YANG HUAN-CHIEN;RICHTEK TECHNOLOGY CORPORATION |
发明人 |
YANG SHEI-CHIE;LIN SHUI-MU;HSIAO CHUAN-YO;YANG HUAN-CHIEN |
分类号 |
H05B41/16 |
主分类号 |
H05B41/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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