Optical Signal Detection With Periodic Light-Emitter Dimming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electronic devices face decreased accuracy in sensing optical signals due to interference from ambient light or light emitted by the device's own light-emitting elements.
Innovation Solution
The electronic device incorporates an optical sensor and a light-emitting element, where the light-emitting element is dimmed during detection periods to reduce interference, allowing the optical sensor to output a signal accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light-emitting element operates at normal brightness, then the display function is maintained, but the optical sensor detection accuracy deteriorates due to light interference
Solution Approach 1:
The light-emitting element operates in periodic cycles, alternating between a first brightness state during non-detection periods and a dimmed second brightness state during detection periods. This periodic switching allows the optical sensor to detect optical signals accurately during dimmed periods while maintaining display functionality during normal brightness periods, thereby resolving the contradiction between display performance and detection accuracy.
2Measurement precision
If the light-emitting element is dimmed during detection period, then the optical sensor detection accuracy is improved, but the display brightness is reduced
Solution Approach 1:
The system implements periodic switching between two operational states: during detection periods, the light-emitting element is dimmed to enhance optical sensor accuracy; during non-detection periods, the light-emitting element returns to normal brightness to maintain display quality. This time-division approach allows both high detection accuracy and normal display brightness to be achieved at different times without compromising either function.
3Measurement precision
If the light-emitting element brightness is reduced, then the signal-to-noise ratio for optical detection is improved, but the visibility of the display is decreased
Solution Approach 1:
The light-emitting element alternates between normal brightness and dimmed brightness in periodic cycles synchronized with detection and non-detection periods. During detection periods, reduced brightness improves the signal-to-noise ratio for optical signal detection. During non-detection periods, normal brightness is restored to maintain display visibility, thus resolving the contradiction between detection sensitivity and display visibility through time-division multiplexing.
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 detection accuracy of optical signals by minimizing noise from adjacent light-emitting elements, improving the signal-to-noise ratio and reducing misjudgments.
Implementation Method 1
an optical sensor and a light-emitting element. The light-emitting element is disposed adjacent to the optical sensor. The optical sensor is configured to detect the optical signal
Data Source
AI summary
An electronic device for detecting an optical signal is provided. The electronic device for detecting the optical signal includes an optical sensor and a light-emitting element. The light-emitting element is disposed adjacent to the optical sensor. The optical sensor is configured to detect the optical signal. The light-emitting element has a first brightness during a non-detection period of the electronic device. The light-emitting element is dimmed and has a second brightness during a detection period of the electronic device. The optical sensor is configured to output a signal when the light-emitting element is dimmed. The first brightness is greater than the second brightness.