Disclosed embodiments integrate a camera into an intraoral mirror. Integrating a camera into an intraoral mirror provides an efficient way to record and display what is visible to the healthcare provider in the mirror.

The present application provides an intelligent control system for touch switch based on infrared sensor detection, which comprises: a position determination module, for setting infrared sensors in the first position, the second position, the third position, and the fourth position respectively, which are used to detect whether a person passes the current position; a time statistics module, for calculating the total time consumed by the target person passing through the first position, the second position, and the third position based on the detection result of those infrared sensors; a time determination module, for calculating the target time consumed by the target person passing from the third position to the fourth position; an intelligent control module, for selecting whether to turn on the light guide line from the fourth position to the position of the touch switch.

A light sensor is provided that includes an exposed light transducer for accumulating charge in proportion to light incident thereon over an integration period; and a light-to-pulse circuit in communication with the exposed light transducer, the light-to-pulse circuit operative to output a pulse having a pulse width based on the charge accumulated by the exposed light transducer. The light-to-pulse circuit may include a one shot logic circuit that contributes to generation of the pulse. The light sensor may include an input/output pad, a capacitor provided at the input/output pad for blocking static electricity, an input low pass filter provided at the input/output pad for blocking electromagnetic interference, and/or a bandgap voltage reference circuit connected to a power source having a supply voltage level in a range of about 3.3V to about 5.0V, and for generating a set of stable reference voltages throughout the supply voltage level range.

One example includes a power-over-Ethernet (PoE) control system. The system includes a powered device (PD) that is configured to receive a voltage signal via an Ethernet connection and which comprises a PoE signal receiver configured to indicate a nominal power level via the received voltage signal. The system also includes a power sourcing equipment (PSE) device configured to generate the voltage signal and to measure a class current of the voltage signal to determine the nominal power level. The PSE device includes a PoE controller configured to provide a power setting command as a function of the nominal power level to the PoE signal receiver via the voltage signal, such that the PD can operate at a power level that is based on the power setting command.

A thermally efficient, cost efficient and compact LED device having an LED module and a circuit board. The LED module having an LED substrate and an LED chip mounted on a mounting surface of the LED substrate. The circuit board is composed of a circuit board substrate and has a plurality of conductive tracks on a surface of the circuit board substrate. The LED substrate is embedded in the circuit board substrate.

An installation bottom base is provided. The installation bottom base includes: a main body, a fixed installation structure connected with the main body, a light source installation structure and a bottom base terminal assembly, and the bottom base terminal assembly includes at least two bottom base terminals exposed to the light source installation structure. When the light source module is installed to the bottom base, the at least two base terminals are electrically connected with the plurality of light emitting units in the light source module, so that at least two of the light emitting units in the light source module are in different power supply circuits. In summary, current supplied to the light emitting units by a power module is transmitted by the at least two terminals, so that the at least two light emitting units are in different power supply circuits.

An installation bottom base is provided. The installation bottom base includes: a main body, a fixed installation structure connected with the main body, a light source installation structure and a bottom base terminal assembly, and the bottom base terminal assembly includes at least two bottom base terminals exposed to the light source installation structure. When the light source module is installed to the bottom base, the at least two base terminals are electrically connected with the plurality of light emitting units in the light source module, so that at least two of the light emitting units in the light source module are in different power supply circuits. In summary, current supplied to the light emitting units by a power module is transmitted by the at least two terminals, so that the at least two light emitting units are in different power supply circuits.

A device for clustering light spots, the device is configured to receive an image captured by a camera, detect light spots in the image, calculate a distance measure for each of a plurality of pairs of light spots detected in the image, and group the detected light spots to clusters based on the calculated distance measures.

A modular electrical control system for installation in an electrical box of a premises includes a switch module configured to control power delivery to at least one external load, the switch module including a multi-position switch device that changes an operational mode of the switch module to off, toggle mode, or dimmer mode, and a removable user interface module configured to connect to the switch module, receive power from the switch module and display an interface in accordance with a setting of the multi-position switch device.

The present disclosure provides a dimming method and a dimmer. In the dimming method, when a mains power state is switched to an emergency state, a dimming ratio K is used to perform dimming control on a load unit; the dimming ratio K is calculated as follows: K=P.sub.source/P.sub.load. The dimmer includes: an emergency power source power acquisition module, configured to acquire an output power P.sub.source of an emergency power source; a load unit power acquisition module, configured to acquire a power P.sub.load of a load unit in a mains power state; and a dimming signal generation module, configured to acquire a dimming ratio according to K=P.sub.source/P.sub.load when the mains power state is switched to an emergency state, generate a dimming signal according to the dimming ratio K, and output the dimming signal to the load unit. The present disclosure also provides a dimming emergency inverter and an emergency lighting system.