Hon Hai Precision Industry Co., Ltd.

Hong-fu Jin Precision Industry (shenzhen) Co., Ltd.

Zhongshan Innocloud Intellectual Property Services Co., Ltd.

Shenzhen Goldsun Network Intelligence Technology Co., Ltd.

Hai-Long Cheng

Jing Liu

Chun-Lung Hung

Lu-Qing Meng

Xue-Bing Deng

Kuo-Pin Lin

A USB OTG device includes a USB interface having a VBUS pin and an ID pin. A voltage input pin of a first switch is connected to a power source VDDV. A voltage output pin of the first switch is connected to the VBUS pin and a second switch. The VBUS pin is connected to a power source Vcc. When the voltage at the ID pin is logic high, the voltage at an enable pin of the first switch is set to be logic high, the first switch is on, the second switch is off, thus the USB OTG device provides power to an external device. When the voltage at the ID pin is logic low, the voltage at the enable pin is set to be logic low, the first switch is off, the second switch is on, thus an external device provides power to the USB OTG device.

USB OTG device with power mode switch function

An electronic device with standby state includes a MCU, a voltage conversion unit, a screen lock circuit, and a power-saving trigger circuit. The voltage conversion unit is connected to the MCU and is used to convert a power supply voltage to a suitable voltage to power the MCU. The screen lock circuit includes a switch, therein, the screen lock circuit is connected to the MCU and is used to lock or unlock the electronic device in response to an operation on the switch when the electronic device is in a work state. The power-saving trigger circuit is connected to the MCU, the voltage conversion unit, and the screen lock circuit, and is used to disable or enable the voltage conversion unit in response to the operation on the switch when the electronic device is in the standby state.

Electronic device with standby mode

A power management circuit comprising a power-on signal input, an output terminal a control unit, a switching unit, and a discharge unit. The control unit configured to selectively turn on the switching unit to output a power-on signal to a display module and selectively turn off the switching unit to cut off an electrical connection between the power-on signal input and the output terminal. The discharge unit configured to discharge residual electrical charges in the display module when the switching unit is turned off.

Power management circuit and liquid crystal display using same

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Shenzhen, China

Hai-Long Cheng