TEETH-WHITENING DEVICE

Devices for whitening teeth that include: a pulse width modulation circuit; a light source and a light delivery mechanism or reflector; a color sensor that detects color of teeth or collects data from light reflected from teeth (e.g., where teeth-whitening is controlled using the data, for instance, color or shade of teeth); a mouth piece and an ultraviolet light source or sterilizer that sterilizes the mouth piece; a Hall-effect sensor or sensor that senses whether the device is in the mouth; an electro-magnetic field (EMF) array; or an accelerometer. The device may: output data, be controlled using hand gestures, or include wireless charging. The light source may be outside the mouth when the device is used to whiten the teeth while the light delivery mechanism or reflector is inside the mouth. The pulse width modulation circuit may drive the light source. 一种用于美白牙齿的装置包括：脉冲宽度调制电路；光源和光递送机构或反射器；颜色传感器，其检测牙齿的颜色或从自牙齿反射的光收集数据（例如，其中使用所述数据来控制牙齿美白，所述数据为例如牙齿的颜色或色调）；口部部件和紫外光源或消毒器，该消毒器对口部部件进行消毒；霍尔效应传感器或感测装置是否在口部中的传感器；电磁