Ambient Light Detection Circuit for Synchronized Multi-Sensor Sampling
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Solution Overview
Problem
Existing display devices face issues with asynchronous signal sensing of ambient light, leading to unsynchronized light signals from different sensing modules.
Innovation Solution
A detection circuit for ambient light that includes sensing modules, current conversion modules, storage modules, and a control module, which synchronizes the output of current sensing signals into voltage signals for synchronized storage and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensing modules are used to collect ambient light, then the sensing capability is improved, but the signal synchronization is deteriorated
Solution Approach 1:
The control module outputs sampling control signals to the storage modules in advance to ensure they are ready to store signals at the correct moment. This preliminary action ensures that even with multiple sensing modules operating independently, their signals are captured synchronously at the predetermined sampling time point.
Solution Approach 2:
The control module coordinates the operation of multiple sensing modules, current conversion modules, and storage modules through controlled feedback signals. By using the sampling control signals as feedback mechanisms, the system ensures that all modules operate in a synchronized manner despite their independent functions.
2Adaptability or versatility
If current sensing signals are converted to voltage signals, then the signal processing capability is improved, but the circuit complexity is worsened
Solution Approach 1:
The circuit is divided into distinct functional modules: sensing modules for light collection, current conversion modules for signal transformation, storage modules for signal holding, and control modules for coordination. This segmentation allows each module to perform its specific function independently, making the overall complex system manageable and maintainable.
Solution Approach 2:
The current conversion modules serve multiple purposes: they convert current signals to voltage signals, amplifies the signals, and prepare them for storage. This multi-functionality reduces the need for separate dedicated circuits for each function, thereby managing complexity while maintaining processing capability.
3Loss of time
If synchronous sampling control signals are output to storage modules, then the signal synchronization is improved, but the control complexity is worsened
Solution Approach 1:
The control module combines multiple control functions into a single integrated unit that manages sensing modules, current conversion modules, and storage modules. By merging these control functions, the system achieves synchronous operation through a unified control mechanism rather than separate independent controls, managing complexity centrally.
Solution Approach 2:
The control module acts as an intermediary between the various sensing and storage operations. It receives inputs from sensing modules, coordinates with current conversion modules, and directs storage module operations. This intermediary role simplifies the overall control structure by providing a single point of coordination for synchronous operation.
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
Ensures synchronized collection and processing of ambient light signals from multiple sensing modules, addressing the asynchronous signal sensing issue in existing technologies.
Implementation Method 1
a sensing module is configured to collect ambient light and output a current sensing signal based on the ambient light
Implementation Method 2
a current conversion module is configured to convert a current sensing signal output by a sensing module connected to the current conversion module into a voltage sensing signal
Data Source
AI summary
A detection circuit includes: a plurality of sensing modules, where a sensing module of the plurality of sensing modules is configured to collect ambient light and output a current sensing signal based on the ambient light; a plurality of current conversion modules, where a current conversion module of the plurality of current conversion modules is configured to convert a current sensing signal output by a sensing module connected to the current conversion module into a voltage sensing signal; a plurality of storage modules, where a storage module of the plurality of storage modules is configured to store a voltage sensing signal output by a current conversion module connected to the storage module in response to a sampling control signal; and a control module, where the control module is configured to output the sampling control signal synchronously to each storage module of the plurality of storage modules.