Abstract: A power management circuit adapted for a portable electronic device is provided. The portable electronic device receives a supply voltage from a USB power supplying port through a built-in USB charging port. The power management circuit includes a USB detection unit, a voltage detection unit, and a control unit. The USB detection unit determines the type of the USB power supplying port. The voltage detection unit detects the supply voltage. The control unit configures the power consumption of the portable electronic device based on the type of the USB power supplying port and the supply voltage. When the portable electronic device initiates booting process with the USB power supplying port being the Dedication Charging Port and the supply voltage being lowered than a threshold, the control unit reduces the power consumption of the portable electronic device to maintain the supply voltage above the threshold for booting stably.

Abstract: A power management circuit adapted for a portable electronic device is provided. The portable electronic device receives a supply voltage from a USB power supplying port through a built-in USB charging port. The power management circuit includes a USB detection unit, a voltage detection unit, and a control unit. The USB detection unit determines the type of the USB power supplying port. The voltage detection unit detects the supply voltage. The control unit configures the power consumption of the portable electronic device based on the type of the USB power supplying port and the supply voltage. When the portable electronic device initiates booting process with the USB power supplying port being the Dedication Charging Port and the supply voltage being lowered than a threshold, the control unit reduces the power consumption of the portable electronic device to maintain the supply voltage above the threshold for booting stably.

Abstract: A backlight module includes a lighting unit including a primary light guiding unit and a light source, and an auxiliary light guiding unit. The light source is disposed at one side of the primary light guiding unit, and emits light toward the primary light guiding unit to be guided thereby for projecting in a first direction. The auxiliary light guiding unit includes a light collecting portion disposed at one side of the lighting unit opposite to the first direction for collecting light leaking from the lighting unit, and a light guiding portion extending generally transversely from one end of the light collecting portion for guiding the light collected by the light collecting portion to emit in a second direction different from the first direction.

Abstract: A backlight module includes a lighting unit including a primary light guiding unit and a light source, and an auxiliary light guiding unit. The light source is disposed at one side of the primary light guiding unit, and emits light toward the primary light guiding unit to be guided thereby for projecting in a first direction. The auxiliary light guiding unit includes a light collecting portion disposed at one side of the lighting unit opposite to the first direction for collecting light leaking from the lighting unit, and a light guiding portion extending generally transversely from one end of the light collecting portion for guiding the light collected by the light collecting portion to emit in a second direction different from the first direction.

Abstract: A water detecting apparatus, which comprises: at least one close loop circuit; and a water detecting circuit, for detecting if a resistance value for the close loop circuit is a predetermined value, to determine if any water exists on the close loop circuit.