A heat delivery element for a shaving razor with a face plate having a skin contacting surface and an opposing inner surface. A heater having a heater track is positioned between an upper dielectric layer and a lower dielectric layer. A heat dispersion layer having a lower surface directly contacts the inner surface of the face plate. An upper surface of the heat dispersion layer directly contacts the lower dielectric layer of the heater.

A shaving razor cartridge includes a housing and at least one razor blade. The housing includes a blade support portion and a handle interface portion. The blade support portion includes a cap and a guard. The handle interface portion is positioned between the front end and the rear end and includes a front wall, a rear wall, an upper surface, and a locking member. The front wall includes a lower surface and an interior surface. The rear wall includes a lower surface and an interior surface. The upper surface defines an upper opening. The locking member extends from the interior surface of the rear wall towards the front wall. The locking member is configured to facilitate selective retention of a razor handle to the housing. The lower surfaces cooperate to define a lower opening. The handle receptacle extends between the lower opening and the upper opening.

A shaving razor cartridge includes a housing and at least one razor blade. The housing includes a blade support portion and a handle interface portion. The blade support portion includes a cap and a guard. The handle interface portion is positioned between the front end and the rear end and includes a front wall, a rear wall, an upper surface, and a locking member. The front wall includes a lower surface and an interior surface. The rear wall includes a lower surface and an interior surface. The upper surface defines an upper opening. The locking member extends from the interior surface of the rear wall towards the front wall. The locking member is configured to facilitate selective retention of a razor handle to the housing. The lower surfaces cooperate to define a lower opening. The handle receptacle extends between the lower opening and the upper opening.

A personal consumer product having an energy emitting element in selective electrical communication with a power source is provided. Thermal control circuitry is used to isolate the energy emitting element from the power source when a temperature of the energy emitting element exceeds a threshold. The thermal control circuitry includes a primary thermal control circuit and a redundant thermal control circuit. Methods for controlling the temperature of an energy emitting element of a personal consumer product are also provided.

A personal consumer product having an energy emitting element in selective electrical communication with a power source is provided. Thermal control circuitry is used to isolate the energy emitting element from the power source when a temperature of the energy emitting element exceeds a threshold. The thermal control circuitry includes a primary thermal control circuit and a redundant thermal control circuit. Methods for controlling the temperature of an energy emitting element of a personal consumer product are also provided.

A razor component comprises a cooling element, which is adapted to provide a cooling effect on a user's skin during a shaving operation, wherein the razor component includes a pressure-responsive phase-change component that is coupled to the cooling element.

A razor component comprises a cooling element, which is adapted to provide a cooling effect on a user's skin during a shaving operation, wherein the razor component includes a pressure-responsive phase-change component that is coupled to the cooling element.

A personal consumer product having an energy emitting element in selective electrical communication with a power source is provided. Thermal control circuitry is used to isolate the energy emitting element from the power source when a temperature of the energy emitting element exceeds a threshold. The thermal control circuitry includes a primary thermal control circuit and a redundant thermal control circuit. Methods for controlling the temperature of an energy emitting element of a personal consumer product are also provided.

A personal consumer product having an energy emitting element in selective electrical communication with a power source is provided. Thermal control circuitry is used to isolate the energy emitting element from the power source when a temperature of the energy emitting element exceeds a threshold. The thermal control circuitry includes a primary thermal control circuit and a redundant thermal control circuit. Methods for controlling the temperature of an energy emitting element of a personal consumer product are also provided.

An illumination level of a luminous element of a user interface for an electrical device is controlled by a processor driving the luminous element with a pulse-width-modulated (PWM) or other type of control signal that is calculated based on a) a signal corresponding to a desired time-varying illumination level of the luminous element to be perceived by a human observer and b) a nonlinear sensitivity relationship between an actual illumination level and a resulting illumination level perceived by a human eye, wherein the corresponding signal comprises an increasing sinusoidal-based ramp function and a decreasing sinusoidal-based ramp function.