Abstract: A virtual image display system, including a handheld electronic device having a first battery and a virtual image display having a second battery, is provided. The handheld electronic device and the virtual image display are coupled to each other. The handheld electronic device is used to calculate a power supply time of the first battery; calculate an expected discharge time of the second battery under a discharge condition; compare the power supply time and the expected discharge time to generate a comparison result; and adjust a supply current provided by the first battery to the virtual image display according to the comparison result.

Abstract: A virtual image display system, including a handheld electronic device having a first battery and a virtual image display having a second battery, is provided. The handheld electronic device and the virtual image display are coupled to each other. The handheld electronic device is used to calculate a power supply time of the first battery; calculate an expected discharge time of the second battery under a discharge condition; compare the power supply time and the expected discharge time to generate a comparison result; and adjust a supply current provided by the first battery to the virtual image display according to the comparison result.

Abstract: A head mounted display device and a power management method are provided. The head mounted display device includes a host device and a power input device. The power input device is detachably connected to a power device and an electronic device. The power input device generates a first input signal according to a supply voltage value of the power device, and generates a second input signal according to power supply information of the electronic device. The host device enters a power saving mode or performs a boot-up operation according to the first input signal and the second input signal.

Abstract: A head mounted display device and a power management method are provided. The head mounted display device includes a host part and a power input part. The power input part is detachably connected to a power device and an electronic device. The power input part generates a first input signal according to a supply voltage value of the power device, and generates a second input signal according to power supply information of the electronic device. The host part enters a power saving mode or performs a boot-up operation according to the first input signal and the second input signal.

Abstract: A hand-held apparatus and a method for power charging management thereof are provided. The method for power charging management includes: providing a power charging voltage and a power charging current to perform a power charging process to the hand-held apparatus, and simultaneously detecting a surface temperature of the hand-held apparatus during the power charging process; activating a power charging management mechanism when the surface temperature is higher than a reference temperature, and simultaneously reducing a voltage value of the power charging voltage; and generating a comparing result by comparing the surface temperature with a plurality of threshold temperatures after the power charging management mechanism is activated, and adjusting a current value of the power charging current based on the comparing result. The reference temperature is lower than the plurality of threshold temperatures and values of the plurality of threshold temperatures are not the same.

Abstract: A hand-held apparatus and a method for power charging management thereof are provided. The method for power charging management includes: providing a power charging voltage and a power charging current to perform a power charging process to the hand-held apparatus, and simultaneously detecting a surface temperature of the hand-held apparatus during the power charging process; activating a power charging management mechanism when the surface temperature is higher than a reference temperature, and simultaneously reducing a voltage value of the power charging voltage; and generating a comparing result by comparing the surface temperature with a plurality of threshold temperatures after the power charging management mechanism is activated, and adjusting a current value of the power charging current based on the comparing result. The reference temperature is lower than the plurality of threshold temperatures and values of the plurality of threshold temperatures are not the same.

Abstract: A hand-held electronic apparatus, a charging system, a connector and a charging management method thereof are provided. The charging management method includes: detecting a detection temperature on a charging port of the hand-held electronic apparatus, wherein the charging port is coupled to a power adapter; starting an alert mode when the detection temperature exceeds a threshold; measuring variation of the detection temperature according to a preset cycle in the alert mode; setting an over-temperature flag according to the variation of the detection temperature in the alert mode; and making the power adapter stop providing a charging voltage according to the over-temperature flag.

Abstract: An electronic system and a charging method are provided. The electronic system includes an electronic device and a charger. The charger is coupled to the electronic device. The electronic device senses a first state of the electronic device. The electronic device determines whether a value corresponding to the first state is greater than a first threshold. When the value corresponding to the first state is greater than the first threshold, the electronic device provides a first control signal, and the charger charges the electronic device by using a first mode according to the first control signal. When the value corresponding to the first state is not greater than the first threshold, the electronic device provides a second control signal, and the charger charges the electronic device by using a second mode according to the second control signal.