| 摘要 |
<p>PURPOSE: By keeping identically the frequency of the whole pulse without being created the pulse signal toward LED of the abnormal state the PWM apparatus for the LED lighting device makes maintain the brightness of the whole LED. CONSTITUTION: The number of fault LED which the priority encoder(1) is continue is calculated. The number of fault LED which 8-to-1 MUX(2) is continue in LED which presently becomes insane is selected. Adder and counters(3, 4) obtain the number of LED which next becomes insane.</p> |
