| 摘要 |
<p>PURPOSE: An analog dimming duty clamping circuit of a backlight unit is provided to minimize the change of an FB signal according to the change of a standard voltage. CONSTITUTION: An analog dimming duty clamping circuit of a backlight unit includes a slope control unit(11) and a switching unit(12). The slope control unit is connected with the FB end of a backlight driving unit(1) to reduce the slope of an FB signal according to the change of standard voltage. If voltage connected with a standard voltage input point, the switching unit is operated to drive the slope control unit.</p> |
