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16 \ VISHAY An Automotive Grade Above Learn More VCNL4035X01 Proximity Sensors Figure 4: Vishay's proximity sensor can be used in the center display of a car (Source: Vishay) Proximity and Gesture Control For the center display in a car (Figure 4), Vishay's AEC-Q101- qualified VCNL4035X01 proximity sensor can be used for both proximity and gesture control. Instead of an internal emitter, this part includes three current drivers that each has a designated pin. This allows external emitters to be driven directly without the need for additional circuity. The ability to choose which external infrared emitters are used and where they are placed with regard to the sensor allows for a highly flexible solution with the circuit topology defining the use case. In an application where a gesture is to be detected, narrow angle emitters can be used, such that the area in which motion is to be detected is well-defined. Using wide angle emitters, on the other hand, allows the sensor solution to cover a wide area, allowing user input to be detected, regardless of which direction the user's hand enters the sensor's field of view. To further expand on this idea, considering each channel has its own ADC, the direction of detection can be differentiated. For example, allowing user input from the passenger side while keeping the driver from being distracted. A combination of the above can also be realized with a single sensor by connecting one of the driver channels to the gate of a MOSFET, which drives an emitter at currents greater than 200mA. A single channel can be used to detect the presence of a user, and the other two channels can be used to sense either a gesture or the presence of a hand at a certain position in front of the display.