Abstract: An integrated circuit for driving high-voltage LED lamps is applied to a rectified alternative current (AC) power and a plurality of LED stacks. The integrated circuit includes a control unit, a plurality of current-clamping units which electrically connect to the control unit and the LED stacks respectively, and a plurality of current-sensing units which electrically connect to the current-clamping units and the control unit. When the rectified power is switched on, the current-sensing unit constantly monitors the electrical current flowing through the respective current-clamping unit and feeds back the monitored data to the control unit. The control unit sequentially switches on or off the current-clamping units according to the combinatorial logic state of the monitored data.

Abstract: A structure for adjusting backlight brightness of an electronic apparatus includes an indicator cover with an optical window and a light detecting circuit board. The indicator cover with an optical window has a window disposed thereon. The light detecting circuit board is installed in the indicator cover with an optical window and disposed correspondingly to the window. In addition, the light detecting circuit board is electrically connected to the backlight module of the electronic apparatus and has a light detecting circuit disposed thereon. The light detecting circuit has a control unit, a light emitting unit, a driving unit, and a storage unit. The light emitting unit has a light emitting component inside the indicator cover and an ambient light detecting unit.

Abstract: An integrated circuit for driving high-voltage LED lamps is applied to a rectified alternative current (AC) power and a plurality of LED stacks. The integrated circuit includes a control unit, a plurality of current-clamping units which electrically connect to the control unit and the LED stacks respectively, and a plurality of current-sensing units which electrically connect to the current-clamping units and the control unit. When the rectified power is switched on, the current-sensing unit constantly monitors the electrical current flowing through the respective current-clamping unit and feeds back the monitored data to the control unit. The control unit sequentially switches on or off the current-clamping units according to the combinatorial logic state of the monitored data.