Wearable Device Light Emitter Recessed in Window Member
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Solution Overview
Problem
Wearable electronic devices with light emitting units integrated into the housing can become thicker and more difficult to assemble, while units integrated into the display can obstruct the user's view and detract from the aesthetic appeal.
Innovation Solution
A wearable electronic device design featuring a light emitting unit positioned between the waveguide of a display member and a window member, with the unit disposed in a recess of the window member, allowing for reduced visibility and enhanced aesthetics, and enabling more accurate gaze tracking due to a shorter distance between the light emitting unit and the user's eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light emitting unit is mounted in the housing, then the gaze tracking function can be implemented, but the housing thickness increases and assembly becomes more difficult
Solution Approach 1:
The light emitting unit is nested within a recess of the window member, which itself is part of the display member assembly. This nested structure allows the light emitting unit to be integrated into the existing housing thickness without increasing it, while still providing the necessary gaze tracking function.
Solution Approach 2:
Instead of mounting the light emitting unit on the outer surface of the housing (2D surface mounting), the patent transitions to a 3D integration by placing the unit within a recess of the window member, utilizing the depth dimension of the display member assembly to accommodate the additional component.
2Length of stationary object
If the light emitting unit is mounted in the display, then the housing thickness is maintained, but the light emitting unit and lines are visually exposed, obstructing the user's view and deteriorating aesthetic sense
Solution Approach 1:
The light emitting unit is nested within a recess of the window member, positioning it behind the front surface of the display member. This nesting arrangement ensures the unit is not visually exposed from the front, eliminating the obstruction and aesthetic deterioration issues while maintaining compact housing thickness.
Solution Approach 2:
The window member serves as an intermediary structure that positions the light emitting unit behind its front surface. This intermediary placement allows the light emitting unit to function without being visually exposed, as the window member acts as a barrier between the unit and the user's direct line of sight.
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 design enhances the aesthetic appeal and usability of wearable electronic devices by minimizing visibility of the light emitting unit while improving gaze tracking recognition rates.
Implementation Method 1
a light emitting unit for emitting visible light or infrared light to track the trajectory of the user's gaze
Implementation Method 2
an optical element including a waveguide configured to guide light generated from the light output module
Data Source
AI summary
A wearable electronic device includes a housing, a light output module disposed in the housing and configured to output an image, at least one display member disposed in the housing, the at least one display member including an optical element a waveguide configured to guide light generated from the light output module and including a first surface and a second surface opposite to the first surface, a first window member disposed on the first surface, and a second window member disposed on the second surface and including a first recess facing the second surface, and at least one light emitting unit disposed in the first recess.