1. An ergonomic sensor module configured for use with a display device, the sensor module comprising: an image sensing device; a processing element; and an input/output interface, wherein the processing element is configured to obtain image data from the image sensing device and analyze the image data to determine, based on predefined data defining an ergonomic use range of the display device, whether the image data indicates that a user of the display is using the display within the ergonomic use range.