Light assemblies for electronic devices with speakers and microphone

What is this patent about?

’106 is related to the field of voice-controlled electronic devices and, more specifically, to the mechanical and optical integration of visual feedback systems within a compact housing. In the context of smart speakers and ambient computing, providing clear status indicators to a user without a traditional screen requires sophisticated light management. The background context involves the challenge of placing microphones, speakers, and lighting elements in close proximity while maintaining high signal quality and uniform visual output.

The underlying idea behind ’106 is a folded optical path that allows lighting elements and microphones to coexist on opposite sides of the same internal substrate. By mounting LEDs on the underside of a circuit board and pointing them away from the user into a specialized reflector, the invention creates a compact assembly where the light is bounced back upward and outward through a peripheral light guide. This design maximizes internal space efficiency and ensures that the light is diffused and uniform by the time it reaches the device's exterior, avoiding the harsh 'hot spots' typical of direct-view LEDs.

The claims of ’106 focus on the specific spatial arrangement of a substrate that serves as a common mounting point for both a microphone and lighting elements. The independent claims describe a configuration where at least one lighting element is positioned on one surface of a substrate—often a planar circuit board—while a microphone is situated on the opposite surface. The claimed architecture requires a reflector positioned in the optical path of the lighting element to redirect light toward a light guide, which then transmits that light to the exterior of the device housing.

In practice, the invention works by utilizing a circular light pipe that sits at the top of a cylindrical housing, serving as the primary visual interface. When the device recognizes a voice command, the controller triggers LEDs on the bottom of the audio board; this light travels downward into reflective cavities containing light-spreading elements. These cavities are engineered to bounce the light upward, where it enters the light guide. This indirect illumination method allows the light ring to appear as a continuous, glowing halo rather than a series of discrete points, providing a premium aesthetic and clear visibility from any angle in a room.

This approach differentiates itself from prior solutions by integrating the user interface components into a single, multi-layered stack that also manages acoustic performance. Unlike devices that place LEDs on the top surface where they might interfere with microphone placement or create glare, ’106 uses the folded optical path to keep the top surface clean for acoustic intake. Furthermore, the implementation allows the light ring to be part of a rotatable top assembly used for volume control, ensuring that the visual feedback remains consistent and correctly aligned regardless of how the physical dial is turned by the user.