Sercomm Corporation

Po-Tsung Chen

Meng-Chien Chiang

Chien-Ming Chen

A video doorbell and an automatic setting method thereof are provided. The video doorbell includes a bridge rectifying unit, a switch unit, and a processing unit. The bridge rectifying unit is configured to output a DC voltage when receiving an AC power from a transformer. During a chime type detection mode, the switch unit is configured to switch a path of the AC power for generating a short-circuit current to trigger a chime. After the short-circuit current is kept for a detection time, the short-circuit current is terminated. During the chime type detection mode, when the short-circuit current is terminated, the processing unit detects a rising time of the DC voltage rising from a first level to a second level, and determine whether the chime is an analog chime or a digital chime according to the rising time.

Video doorbell and automatic setting method thereof

A security device comprises a mounting plate and a mounting device. The mounting plate, for being fixed to a surface, comprises a first electrical contact point and a second electrical contact point electrically connecting to the first electrical contact point. The mounting device is to be assembled to the mounting plate and comprises a third electrical contact point, a fourth electrical contact point and a detection circuit. The third electrical contact point is for contacting the first electrical contact point when the mounting device is assembled to the mounting plate. The fourth electrical contact point is for contacting the second electrical contact point when the mounting device is assembled to the mounting plate. The detection circuit is electrically connected to the fourth electrical contact point, for determining whether the fourth electrical contact point is electrically connected to the third electrical contact point.

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Taipei, Taiwan

Po-Tsung Chen