Wearable Display Module with Fixed Eye Tracking During Diopter Adjustment
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Solution Overview
Problem
In wearable electronic devices with display modules for virtual reality, diopter adjustment can cause malfunctions in eye tracking and light-emitting components due to their relative movement with lenses, affecting eye tracking accuracy.
Innovation Solution
The display module design includes a fixed barrel with a rotary barrel and lens modules that allow diopter adjustment without moving the eye tracking camera and light-emitting member, maintaining a consistent distance for accurate tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the eye tracking camera module and light-emitting member are disposed on the lenses to save mounting space, then the device structure is compact, but the distance between these components and the user's eye changes during diopter adjustment, causing tracking malfunction
Solution Approach 1:
The display module is divided into two distinct mounting regions: a fixed region on the housing for the eye tracking camera module and light-emitting member, and a movable region with lenses for diopter adjustment. This segmentation allows the tracking components to remain stationary while lenses move independently, resolving the contradiction between compact mounting and tracking reliability.
Solution Approach 2:
The eye tracking camera module and light-emitting member are extracted from the lens assembly and mounted separately on the housing. This extraction prevents them from moving with the lenses during diopter adjustment, eliminating the tracking malfunction while maintaining space efficiency through dedicated mounting positions.
2Adaptability or versatility
If multiple lenses are used for diopter adjustment, then eyesight compensation is improved, but the structural complexity of the display module increases
Solution Approach 1:
Multiple lenses are nested within a single display module structure, with each lens capable of independent movement along the optical axis. This nesting allows multiple lens elements to be integrated compactly, providing eyesight compensation functionality without proportionally increasing overall structural complexity.
Solution Approach 2:
The lens assembly is designed with dynamic adjustment capability, allowing lenses to move relative to each other along the optical axis for diopter adjustment. This dynamic structure enables eyesight compensation while maintaining a relatively simple fixed mounting framework, balancing adaptability and complexity.
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 ensures stable eye tracking and improved accuracy by fixing the positions of the eye tracking camera and light-emitting member relative to the user's eye during diopter adjustments, preventing malfunctions.
Implementation Method 1
a light-emitting member that emits an infrared light to the pupil of the user
Implementation Method 2
the display module may include a plurality of lenses, and the user's eyesight difference may be adjusted by adjusting intervals of the plurality of lenses
Data Source
AI summary
A wearable electronic device is provided. The wearable electronic device includes a housing, and at least one display module disposed on the housing, wherein the display module includes a fixed barrel including a body part and a segment part protruding along an outer periphery of the body part, a rotary barrel disposed on an outer surface of the body part and rotatably combined with the body part, a first lens module fixed to the body part of the fixed barrel, a display combined with the fixed barrel to cover the first lens module, a second lens module inserted into the body part of the fixed barrel to face the first lens module, engaged with the rotary barrel, and configured to move in a first axis direction against the first lens module as the rotary barrel is rotated against the fixed barrel, a light-emitting member, and an eye tracking camera module.