INFRARED ILLUMINATION THROUGH BACKGROUND LIGHTING SOURCE

摘要

Technologies are provided for IR illumination through background lighting sources. Some examples are directed to as IR light source such as IR LEDs being interspersed with visible light sources (e.g., LEDs) in a light guide of a display. IR LED configuration and/or light extraction features of the light guide may be selected such that a desired IR illumination pattern (e.g., a more centralized or a more uniform pattern) can be achieved. In other examples, an activation (turning on/off) of the IR LEDs may be used to generate the desired IR illumination pattern. The IR LEDs may be driven by the same circuitry as the visible light LEDs or by dedicated drive circuitry. Furthermore, the IR LEDs may be activated in an interlaced form with the visible light LEDs (e.g., selected frames in a stream of frames) to provide the IR illumination while displaying content.