Abstract: A wearable device includes an annular-shaped wearing member and a first coil. The annular-shaped wearing member includes an outer annular surface, the first coil is accommodated inside the annular-shaped wearing member, and a laying surface of the first coil is arranged along a circumferential direction of the annular-shaped wearing member. An electronic device includes a second coil. In a case that the outer annular surface partially abuts against the electronic device, the first and second coils are disposed opposite to each other, and the first and second coils in an energized state generate magnetic field lines in a same direction. In a wearable system of the embodiments of the present disclosure, the wearable device can be charged while the electronic device is being used, which improves convenience of use of the wearable device.

Abstract: This application relates to the field of communications technologies, and provides an ambient light detection method and a terminal, to help save top space of a mobile phone, help increase a screen-to-body ratio of the mobile phone, and help improve user experience. The method includes: obtaining, by the terminal, a first luminance value of each first pixel, where each first pixel corresponds to one first luminance value; obtaining, by the terminal, a second luminance value of each region based on first luminance values of all first pixels included in each region, where each region corresponds to one second luminance value; obtaining, by the terminal, a luminance value of current ambient light based on all the second luminance values; and adjusting, by the terminal, luminance of the display based on the luminance value of the ambient light.

Abstract: This application relates to the field of communications technologies, and provides an ambient light detection method and a terminal, to help save top space of a mobile phone, help increase a screen-to-body ratio of the mobile phone, and help improve user experience. The method includes: obtaining, by the terminal, a first luminance value of each first pixel, where each first pixel corresponds to one first luminance value; obtaining, by the terminal, a second luminance value of each region based on first luminance values of all first pixels included in each region, where each region corresponds to one second luminance value; obtaining, by the terminal, a luminance value of current ambient light based on all the second luminance values; and adjusting, by the terminal, luminance of the display based on the luminance value of the ambient light.