Abstract: A skincare device includes a brushhead; a body including a motor assembly configured to oscillate the brushhead and an inertial measuring unit (IMU) configured to determine kinematic measurements of the device; a first optical encoder including a light source and an optical sensor configured to capture images; and processing circuitry configured to determine a location of the brushhead with respect to a body part of the user based on a combination of data measured from the IMU and the first optical encoder.

Abstract: A personal care appliance is provided that includes an applicator head that includes at least a first applicator surface and a second applicator surface, each being configured to contact a skin surface of a user; an appliance body having a motor assembly for oscillating the applicator at a first frequency corresponding to the first applicator surface and a second frequency corresponding to the second applicator surface.

Abstract: Devices and methods for electrostatic application of cosmetics are described. In one embodiment, a system for electrostatic deposition of cosmetic material on a surface includes: a housing; a nozzle configured for breaking the cosmetic material into cosmetic particles and for directing the cosmetic particles out of the housing and toward the surface; and a reservoir configured for holding the cosmetic material. The reservoir is connected to the nozzle. The system also includes an airflow conduit configured to provide air to the nozzle; and a nozzle electrode configured proximately to the nozzle. The nozzle electrode is configured to charge the cosmetic particles.

Abstract: A method includes determining a position of a skincare device with respect to a body part of a user via one or more sensors on the skincare device, the skincare device configured to apply a treatment to the user's body part; obtaining a location of a target area on the body part having a condition for application of the treatment; adjusting a parameter of the skincare device according to the location of the target area and based on the condition.

Abstract: A skincare device includes a brushhead; a body including a motor assembly configured to oscillate the brushhead and an inertial measuring unit (IMU) configured to determine kinematic measurements of the device; a first optical encoder including a light source and an optical sensor configured to capture images; and processing circuitry configured to determine a location of the brushhead with respect to a body part of the user based on a combination of data measured from the IMU and the first optical encoder.

Abstract: A personal care appliance is provided that includes an applicator head that includes at least a first applicator surface and a second applicator surface, each being configured to contact a skin surface of a user; an appliance body having a motor assembly for oscillating the applicator at a first frequency corresponding to the first applicator surface and a second frequency corresponding to the second applicator surface.

Abstract: Devices and methods for electrostatic application of cosmetics are described. In one embodiment, a system for electrostatic deposition of cosmetic material on a surface includes: a housing; a nozzle configured for breaking the cosmetic material into cosmetic particles and for directing the cosmetic particles out of the housing and toward the surface; and a reservoir configured for holding the cosmetic material. The reservoir is connected to the nozzle. The system also includes an airflow conduit configured to provide air to the nozzle; and a nozzle electrode configured proximately to the nozzle. The nozzle electrode is configured to charge the cosmetic particles.

Abstract: Thinned-portion substrates and processing of thinned-portion substrates is provided. A portion of a substrate, such as a mother glass used in touch screen manufacturing, can be thinned by forming a cavity in a surface of the substrate. Surface structures, such as touch sensing circuitry and/or display circuitry, can then be formed on the thinned portion of the substrate. For example, touch screen components can be formed as surface structures including touch sensing circuitry and display circuitry on one or more thinned substrate portions through processes including depositing, masking, etching, doping, etc. The thinned substrate portion, including the surface structures formed thereon, can then be detached from the surrounding thicker part of the substrate. In this way, for example, the surrounding thicker part of the substrate can provide structural integrity during various other manufacturing processes, while allowing surface structures to be formed directly on a thinner substrate.