Interior rearview mirror assembly with driver monitoring system

A vehicular interior rearview mirror assembly, the vehicular interior rearview mirror assembly comprising:

• a mirror head adjustably disposed at a mounting base that is configured to attach the vehicular interior rearview mirror assembly at an interior portion of a vehicle equipped with the vehicular interior rearview mirror assembly, wherein the mirror head comprises an interior mirror reflective element;
• wherein the interior mirror reflective element has a planar front surface and a planar rear surface opposite the planar front surface, and wherein the planar front surface is closer to a driver of the vehicle than the planar rear surface when the vehicular interior rearview mirror assembly is attached at the interior portion of the equipped vehicle;
• wherein the interior mirror reflective element comprises a mirror transflector, and wherein the mirror transflector transmits near-IR light incident thereon, transmits visible light incident thereon and reflects visible light incident thereon;
• a camera disposed within the mirror head and viewing through the mirror transflector of the interior mirror reflective element, wherein the camera moves in tandem with the mirror head when, with the vehicular interior rearview mirror assembly attached at the interior portion of the equipped vehicle, the mirror head is adjusted relative to the mounting base to adjust the driver's rearward view;
• wherein the camera comprises an imaging sensor having a quantum efficiency (QE) of at least 15% for near-infrared (near-IR) light having a wavelength of 940 nm;
• wherein the camera is operable to capture frames of image data;
• a driver monitoring system (DMS) data processor;
• first, second and third near-IR illumination sources disposed within the mirror head and operable to emit near-IR light that passes through the mirror transflector of the interior mirror reflective element;
• wherein the first near-IR illumination source is at a first angle relative to the planar front surface of the interior mirror reflective element;
• wherein the second near-IR illumination source is at a second angle relative to the planar front surface of the interior mirror reflective element;
• wherein the third near-IR illumination source is at a third angle relative to the planar front surface of the interior mirror reflective element;
• wherein the first angle is a different angle than the second angle;
• wherein the third angle is a different angle than the first angle;
• wherein, with the vehicular interior rearview mirror assembly attached at the interior portion of the equipped vehicle and with the mirror head adjusted to provide the driver's rearward view, the first near-IR illumination source, when powered, illuminates a front seat region at a driver side of the equipped vehicle and a front seat region at a passenger side of the equipped vehicle;
• wherein, with the vehicular interior rearview mirror assembly attached at the interior portion of the equipped vehicle and with the mirror head adjusted to provide the driver's rearward view, the second near-IR illumination source, when powered, illuminates the front seat region at the driver side of the equipped vehicle;
• wherein, with the vehicular interior rearview mirror assembly attached at the interior portion of the equipped vehicle and with the mirror head adjusted to provide the driver's rearward view, the third near-IR illumination source, when powered, illuminates the front seat region at the passenger side of the equipped vehicle;
• wherein the DMS data processor is operable to provide a driver monitoring function and an occupant detection function;
• wherein, when the DMS data processor is operating to provide the driver monitoring function, the camera captures driver-monitoring frames of image data and the first and second near-IR illumination sources are powered while the camera is capturing driver-monitoring frames of image data, and wherein data derived from captured driver-monitoring frames of image data is processed at the DMS data processor for driver monitoring, and wherein the third near-IR illumination source is not powered while the camera is capturing driver-monitoring frames of image data;
• and
• wherein, when the DMS data processor is operating to provide the occupant detection function, the camera captures occupant-detection frames of image data and the first, second and third near-IR illumination sources are powered while the camera is capturing occupant-detection frames of image data, and wherein data derived from captured occupant-detection frames of image data is processed at the DMS data processor for occupant detection.