Curved Top-Cap Light Diffusion for Uniform Visual Feedback
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Solution Overview
Problem
Incorporating light-emitting components into electronic devices can be challenging, leading to unintended light patterns and bulkiness, affecting the device's appearance and functionality.
Innovation Solution
The use of a housing with a curved transparent or translucent top cap, an array of light-emitting components on a planar printed circuit, and a support structure with ring-shaped rib members and a diffuser layer to control light angular spread, along with a light guide and lens structure to direct light towards the top cap, ensuring uniform and balanced visual feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light-emitting components are incorporated into the electronic device, then visual feedback functionality is improved, but the device becomes overly bulky
Solution Approach 1:
The light-emitting components are nested within the housing structure, specifically positioned behind the top cap portion. The support structure with rib members is nested within the housing, and the diffuser layer is nested within the support structure, creating a compact nested arrangement that provides visual feedback functionality without increasing overall device volume
Solution Approach 2:
The light-emitting components are arranged in a two-dimensional array on a planar printed circuit board, which is then positioned within the three-dimensional housing space. This dimensional arrangement allows efficient use of space, providing comprehensive visual feedback coverage while maintaining a compact device footprint
2Adaptability or versatility
If light-emitting components are incorporated into the electronic device, then visual feedback functionality is improved, but the light patterns do not appear as intended
Solution Approach 1:
The diffuser layer acts as an intermediary between the light-emitting components and the top cap portion. It receives light from the LEDs and diffuses it to create uniform light distribution across the top cap, ensuring that the light patterns appear as intended rather than as discrete LED points
Solution Approach 2:
The rib members are strategically positioned at specific locations within the support structure to control light distribution in different regions. This local structural variation ensures uniform light emission across the entire top cap surface by managing light paths from different LED regions
3Manufacturing precision
If a support structure with diffuser layer is used to control light spread, then light distribution uniformity is improved, but device complexity increases
Solution Approach 1:
The support structure and diffuser layer are merged into a single integrated component. The diffuser layer is formed as part of the support structure itself, eliminating the need for separate assembly steps and reducing manufacturing complexity while maintaining light distribution uniformity
Solution Approach 2:
The support structure serves multiple functions: it provides mechanical support for the light-emitting components, controls light distribution through its rib members, and houses the diffuser layer. This multi-functionality reduces the need for additional separate components, simplifying the overall device structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for aesthetically pleasing and functional visual feedback, providing uniform light distribution and improved color balance, reducing bulkiness and unwanted light artifacts.
Implementation Method 1
a light guide and lens structure may be formed over the light-emitting components to direct light towards the top cap portion
Implementation Method 2
The light guide and lens structure may optionally include a prism-type edge portion configured to direct light, via total internal reflection, towards a lateral edge of the top cap portion
Implementation Method 3
a support structure may surround the array and may include one or more ring-shaped rib members configured as baffles to control the angular spread of light emitted from the light-emitting components
Implementation Method 4
a light guide member, and a lens member for illuminating a photoluminescent glyph layer on the top cap
Data Source
AI summary
An electronic device such as a voice-controlled speaker device may have a housing. A speaker and other input-output components and control circuitry may be mounted within the housing. Light-emitting components may emit light that passes through a curved upper top cap portion or other housing structure. The light-emitting components may be interconnected using a flex circuit on a curved substrate or may be mounted on a planar circuit board. A subset of the light-emitting components may be rotated to improve color balance. Optical structures such as light guides, lens, microlenses, and/or a diffuser layer may be disposed over the light-emitting components to promote light mixing, to reduce hotspots, and to improve contrast on the top cap. The diffuser layer may be suspended using a support structure having baffle members to constraint the angular spread of the emitted light. Illuminated or persistently visible glyphs may be displayed in or near the top cap portion.