Ambient Light Sensor Adjusts Ophthalmic Device Power
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Solution Overview
Problem
Accommodating ophthalmic devices face power constraints that limit the precision and accuracy of accommodation sensors, particularly under varying illumination conditions, as they require more electrical power for higher precision and accuracy, leading to trade-offs in power consumption and performance.
Innovation Solution
The ophthalmic devices incorporate ambient light sensors and a controller that adjust the measurement of biological accommodation signals based on ambient light conditions, degrading performance in bright illumination and enhancing it in low-light conditions, using fewer measurements and computations in bright light while increasing precision in low light to compensate for the eye's susceptibility to defocus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If more electrical power is used for sensing target optical power, then measurement precision and accuracy improve, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the measurement precision and power consumption adjustable based on ambient light conditions. The system dynamically switches between high-precision/high-power mode (in low light) and low-precision/low-power mode (in bright light), resolving the contradiction by allowing both characteristics to vary according to operational context rather than being fixed.
Solution Approach 2:
The patent changes the measurement parameters (precision, accuracy, power consumption) based on ambient light levels. By detecting ambient light conditions and adjusting the sensing parameters accordingly, the system achieves high precision when needed (low light) while conserving power when high precision is less critical (bright light), thus resolving the trade-off between measurement precision and power consumption.
2Measurement precision
If measurement precision is increased to compensate for eye susceptibility to defocus in low light, then accuracy improves, but power consumption increases
Solution Approach 1:
The patent changes measurement parameters based on ambient light conditions. In low-light conditions where the eye is more susceptible to defocus, the system increases measurement precision and accuracy by allocating more power to sensing. In bright light conditions, the system reduces measurement precision requirements and accordingly reduces power consumption, resolving the contradiction by adapting parameters to environmental conditions.
Solution Approach 2:
The system dynamically adjusts measurement precision and power consumption based on real-time ambient light detection. This dynamic adaptation allows the system to maintain high accuracy when the eye is most vulnerable to defocus (low light) while conserving power during daytime conditions, effectively resolving the contradiction between accuracy and power consumption through context-dependent operation.
3Use of energy by moving object
If fewer measurements and computations are used in bright light, then power consumption decreases, but measurement precision may degrade
Solution Approach 1:
The patent changes measurement parameters based on ambient light conditions. In bright light, the system reduces measurement precision requirements and accordingly reduces power consumption by using fewer measurements and computations. This parameter adaptation resolves the contradiction by accepting lower precision when environmental conditions (bright light) make the eye less susceptible to defocus, thereby justifying the trade-off.
Solution Approach 2:
The system dynamically adjusts the number of measurements and computations based on ambient light detection. During bright light conditions, the system operates in a low-power mode with reduced measurement precision, while in low-light conditions it switches to high-precision mode with more measurements and computations. This dynamic behavior resolves the contradiction by adapting system operation to environmental context.
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 approach allows for accurate and precise adjustment of optical power in both bright and low-light conditions, optimizing power usage and performance by tailoring measurement methods to ambient light levels, thereby improving the device's ability to mimic the eye's natural focus adjustments.
Implementation Method 1
measuring, with an ambient light sensor, a brightness of ambient light incident upon the ophthalmic device
Data Source
AI summary
Accommodating ophthalmic devices including an ambient light sensor and an accommodation sensor and related methods of use are described. In an example, the accommodation sensor is configured to measure a biological accommodation signal of an eye on or in which the accommodating ophthalmic device is mounted. In an embodiment, the accommodating ophthalmic device is configured to measure the biological accommodation signals based on ambient light, such as based on an intensity or amount of ambient light, incident on the accommodating ophthalmic device. Such ambient light may be measured with the ambient light sensor.