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Video intercom device

  • US 9,635,322 B2
  • Filed: 01/07/2016
  • Issued: 04/25/2017
  • Est. Priority Date: 04/01/2015
  • Status: Active Grant
First Claim
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1. A video intercom device that performs a wireless communication between a front door slave device and an indoor master device,wherein the indoor master device includesa wireless transmitter that requests the front door slave device to be switched between a first communication method and a second communication method,wherein, in the first communication method, a main power source included in the front door slave device, periodically turns on and turns off while the front door slave device is in a sleep state, and in the second communication method, the front door slave device in the sleep state turns on the main power source when an interrupt signal is detected at the front door device, wherein the front door slave device includesa processor that controls switching the front door slave device to one of the first or second communication method requested from the indoor master device, andwherein, in the first communication method, a period between the turning on and off of the main power source is greater than 1 second.

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