Abstract: A shaving unit and/or electric shaver having a lighting module for providing an optical heating function at a skin-contacting surface of the shaving unit is disclosed. An encapsulation arrangement for components of the lighting module using a potting material is described. The potting material encapsulates, on both an upper and lower side, a carrier to one or more lighting elements are mounted.

Abstract: A shaving unit and/or electric shaver having a lighting module for providing an optical heating function at a skin-contacting surface of the shaving unit. At least one aspect of the invention relates to an encapsulation arrangement for components of the lighting module by means of a potting material which encapsulates, on both an upper and lower side, a carrier to which lighting elements are mounted.

Abstract: A device for measuring hair properties has a first part (I) and a second part (II) between which hair (H) is guided. The first part includes a measuring probe (MP), and the second part is arranged for deforming the hair against the measuring probe. While the device moves along the hair, the measuring probe experiences both a friction force resulting from the hair being guided along the measuring probe, and a deformation force resulting from hair deformation by the second part against the measuring probe. The second part includes a pressure element (PB, S) for pressing the hair against the measuring probe. In alternative embodiments, the second part comprises alignment elements (AE) at opposite sides of the measuring probe, and guidance elements (G) for mitigating an influence of an angle at which the device is applied to the hair to the friction force and/or the deformation force.

Abstract: A hair styling device comprises an optical radiation source (L) for radiating hair (H), a sensor unit (S) for measuring effects from radiating hair (H), and a feedforward control device for controlling the optical radiation source (L) in dependence on a signal from the sensor unit (S). The optical radiation source (L1, L2) may produce a first flash having a first energy density that may be lower than required for photo-thermal hair reshaping, the optical radiation source being controlled to produce a subsequent flash in dependence on a sensor signal obtained in response to the first flash, which subsequent flash may have at least the first energy density. The sensor unit (S) may include a sensor arranged before the optical radiation source in a hair flow direction.

Abstract: A device for measuring hair properties has a first part (I) and a second part (II) between which hair (H) is guided. The first part (I) comprises a measuring probe (MP), and the second part (II) is arranged for deforming the hair (H) against the measuring probe (MP). While the device moves along the hair (H), the measuring probe (MP) experiences both a friction force resulting from the hair (H) being guided along the measuring probe (MP), and a deformation force (DF) resulting from the hair (H) being deformed by the second part (II) against the measuring probe (MP). Advantageously, the second part (II) comprises a pressure element (PB, S) for pressing the hair (H) against the measuring probe (MP), to squeeze the hair (H).

Abstract: In a hair styling device (20) having a two-dimensional array (21) of elements to bring hair at a styling temperature, the elements produce optical radiation energy. The elements may include one or more LEDs, and preferably a plurality of LEDs, in which case the LEDS are driven in clusters that may be of mutually different shapes and sizes. The hair styling device (20) further comprises sensors to obtain an areal light absorption measurement opposed to the two-dimensional array of elements, and a control unit for individually controlling the elements in dependence of the measurement. The sensors may be arranged for measuring an areal light density profile of a whole treatment area. The hair styling device may radiate hair from two sides, both of which includes an areal light absorption measurement. The sensors may include LEDs that do not produce light.

Abstract: In a hair styling device (20) comprising a heat source (21, 23) for heating hair by conduction via direct contact between a hair contact surface of the heat source (21, 23) and the hair, and an optical radiation source (21) for—in combination with heat from the heat source (21, 23)—heating the hair to a temperature sufficiently high for hair styling by absorption of optical radiation by the hair, the heat source (21, 23) obtains heat from energy provided by the optical radiation source (21), and in a preferred embodiment, only from the optical radiation source (21). Advantageously, the heat source (21, 23) may include a heat bridge (22) coupled to a heat sink —of the optical radiation source (21), the heat bridge (22) having the hair contact surface for heating the hair.

Abstract: A hair styling device comprises a heating contact surface (HP) for applying heat to hair; a temperature sensor (TS) for sensing a hair temperature; and a control circuit to control a heating of the heating contact surface (HP) in such a manner that a first temperature setting that applies when hair is wet, does not exceed a threshold temperature, the threshold temperature not exceeding 120° C., while a second temperature setting of at least 140° C. applies when the hair is not wet.

Abstract: A nozzle for a hair care device comprises a plurality of diffuser tips protruding from a front face of the nozzle for applying IR radiation from an IR LED to a scalp (S) of a user. The diffuser tips have an air outlet (AO) for blowing hair (H) aside to reduce absorption of the IR radiation from the IR LED by the hair (H). Preferably, the diffuser tips each have a light guide (LG) for guiding the IR radiation through the diffuser tip. Preferably, each diffuser tip is provided with an IR LED for generating IR radiation at an intensity not exceeding 15 mW/cm2. Preferably, the intensity does not exceed 10 mW/cm2. The invention also relates to a hair care device comprising such a nozzle.

Abstract: A hair styling device comprises a heating contact surface (HP) for applying heat to hair; a temperature sensor (TS) for sensing a hair temperature; and a control circuit to control a heating of the heating contact surface (HP) in such a manner that a first temperature setting that applies when hair is wet, does not exceed a threshold temperature, the threshold temperature not exceeding 120° C., while a second temperature setting of at least 140° C. applies when the hair is not wet.