US 2009/0212926 A1 · Baby Monitor

Abstract

A baby monitor which eliminates potential harmful microwave effect of wireless signal generated by current wireless baby monitors. The baby monitor has a nursery unit, a parent unit, and optionally a gateway. The nursery unit consists of video or audio acquisition, amplifier, microcontroller, microcontroller-controlled band-pass filter, microcontroller-controlled carrier generator and modulator, power line coupling circuitry. It transmits signal to the parent unit or the gateway through power line. Parent unit includes power line coupling circuit, micro-controller, microcontroller-controlled band pass filter, super-heterodyne amplifier, video/audio modulator and video/audio player. Alternatively, the power coupling circuit, microcontroller, microcontroller-controlled band-pass filter and super-heterodyne amplifier in the parent unit can be separated and form a gateway device which then communicates with the parent unit wirelessly.

Claims9

Dependent claims

A baby monitor including:

a nursery unit, power line and a parent unit wherein
A. The signal output terminal of said nursery unit is plugged directly into the power outlet socket;
B. The signal input and output terminals of said parent unit are plugged directly into the power outlet socket;
C. Said nursery unit is connected to said parent unit by power line, The audio or video signal captured by said nursery unit modulates a carrier signal which is then sent to the power line, Said parent unit receives the modulated carrier, demodulates and replays the audio or video signal.

1 more element

A baby monitor including a nursery unit, power line, gateway and a parent unit wherein

A. The input and output terminals of said nursery unit are plugged directly into power line socket;
B. One signal input terminal of said gateway is plugged directly into the power outlet socket and is connected to the nursery unit by the power line, it also contains another signal output terminal for wireless transmitter used to connect to said parent unit;
C. One of the signal input terminal of said parent unit is a wireless receiver device, it connects to said gateway wirelessly and receives the high frequency carrier signal from the gateway.

Dependencies are inferred from the claim text.

Baby Monitor

Life of this patent

Baby Monitor

Life of this patent

Abstract

Claims9