Oral care device and method

An oral care device comprising:

• a field generator, comprising one or more conductive elements, and adapted to generate an electric field in a mouth of a user, responsive to an input control signal;
• and
• a controller adapted to generate the input control signal, to control generation of the electric field, wherein the electric field is for imparting a force upon particles forming a biofilm to be removed by the oral care device, or upon cleaning agent particles,
• wherein the controller is adapted to generate a cyclic control signal for intermittent generation of an electric field at a first RF frequency,
• wherein the controller is adapted to generate the cyclic control signal for alternating generation of an electric field at said first RF frequency and at a second RF frequency.

A method of controlling an oral care device, the method comprising:

• generating a control signal, to control generation of an electric field in a mouth of a user, wherein the electric field is for imparting a force upon particles forming a biofilm to be removed by the oral care device or upon cleaning agent particles, wherein the control signal comprises a cyclic control signal for intermittent generation of the electric field at a first RF frequency;
• generating a cyclic control signal for alternating generation of an electric field at a first RF frequency and at a second RF frequency, wherein the cyclic control signal is for:
• generating a frequency switch between said first RF frequency and said second RF frequency;
• or
• generating a frequency sweep between said first RF frequency and said second RF frequency.

An oral care device comprising:

• a brush head;
• a motor for driving the brush head with a vibratory motion with a vibration frequency;
• a field generator, comprising one or more conductive elements, and adapted to generate an electric field in a mouth of a user, responsive to an input control signal;
• and
• a controller adapted to generate the input control signal, to control generation of the electric field, wherein the electric field is for imparting a force upon particles forming a biofilm to be removed by the oral care device, or upon cleaning agent particles,
• wherein the controller is adapted to generate a cyclic control signal for intermittent generation of an electric field at a first RF frequency,
• wherein the frequency of the cyclic control signal is equal to the vibration frequency or a sub-harmonic of the vibration frequency.