Sensor-Driven Tunable Lens Power Adjustment for Viewing Comfort
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Solution Overview
Problem
Head-mounted devices with fixed lenses often struggle to optimally present content to each user due to the difficulty in adjusting the lenses to accommodate individual user needs.
Innovation Solution
Incorporating a tunable lens module that adjusts its spherical power based on data from sensors, allowing it to switch between different modes to better suit the user's viewing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed lens is used in a head-mounted device, then the device structure is simple and manufacturing is easy, but the lens cannot adapt to different user viewing conditions and needs
Solution Approach 1:
The patent applies a tunable lens that can dynamically change its optical properties (spherical power) in response to sensor data detecting nearby objects. The lens transitions from a fixed state to an adjustable state, allowing real-time adaptation to different viewing conditions while maintaining a compact form factor suitable for head-mounted devices.
Solution Approach 2:
The patent changes the spherical power parameter of the lens based on sensor inputs. When a nearby object is detected, the lens adjusts its spherical power from a first value to a second value, enabling the system to adapt to different focal distances and viewing conditions without requiring multiple fixed lenses.
2Ease of operation
If a tunable lens is used to adapt to user needs, then the content presentation is optimized, but the device complexity increases
Solution Approach 1:
The tunable lens system operates autonomously by using sensor data to automatically adjust its optical properties without requiring manual user input. The system detects nearby objects and adjusts lens spherical power automatically, reducing the burden on the user while optimizing content presentation.
Solution Approach 2:
The system incorporates sensors that detect viewing conditions (such as the presence of nearby objects) and uses this feedback information to adjust the lens parameters accordingly. This closed-loop control enables the lens to adapt to user needs based on real-time environmental data, improving ease of operation.
3Reliability
If the lens adjusts spherical power dynamically, then the viewing comfort is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs a tunable lens that can change its spherical power parameter dynamically rather than requiring multiple precision-crafted fixed lenses with different powers. This approach maintains manufacturing simplicity while achieving reliable viewing comfort across different distances, as the single lens adapts its parameters software-controlled through actuation.
Data Source
AI summary
An electronic device may include a lens module with a tunable lens. The tunable lens may be operable in multiple modes such as a normal mode, a presbyopia-mitigation mode, a near-focus mode, and a negative power boost mode. During operation, the electronic device may gather data and adjust the tunable lens based on the gathered data. The tunable lens may be switched from the normal mode to the presbyopia-mitigation mode in response to determining that a nearby object is being viewed through the lens module. The tunable lens may be switched from the normal mode to the negative power boost mode in response to ambient light levels being low and/or eye fatigue levels being high. The tunable lens may switch between modes over a transition period. An output device may notify the user when the tunable lens changes modes.