Power Level Identification Circuit for Adapter Misuse Prevention
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Solution Overview
Problem
Similar appearances of different voltage or power adapters can lead to incorrect usage, potentially damaging electronic devices when a power adapter with a small power output is used for a device requiring high power or vice versa, highlighting the need for a circuit that can identify and mark the power level.
Innovation Solution
A power level identification circuit comprising a voltage conversion unit, power interface, waveform detection unit, and signal pre-processing unit, along with a power level flag circuit that includes a voltage conversion unit, power interface, isolation units, and signal level coding unit, to accurately identify and indicate the power level, ensuring appropriate usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If power adapters have similar appearances for standardized design, then ease of manufacture and portability are improved, but identification of power levels becomes difficult leading to potential device damage
Solution Approach 1:
The patent applies color coding to differentiate power levels. Different colored indicators or markings are provided on power adapters to represent different power output levels, enabling users to quickly identify and select the appropriate adapter without confusion between similar-looking adapters.
Solution Approach 2:
The patent introduces an intermediary identification circuit that detects power level characteristics and provides visual or signal-based indication. This intermediary system bridges the gap between the physical adapter and the user's understanding of its power capabilities, preventing misuse.
2Device complexity
If power adapters are designed with uniform appearance, then device complexity is reduced, but measurement precision of power level identification deteriorates
Solution Approach 1:
Visual color indicators are integrated into uniformly designed adapters to convey power level information. This allows the adapter to maintain a simple, uniform appearance while providing precise power level identification through color coding, resolving the contradiction between design simplicity and measurement precision.
Solution Approach 2:
The patent replaces complex mechanical or electrical identification mechanisms with simpler visual indicators. Instead of using complex switching mechanisms or multiple physical configurations to indicate power levels, the system uses color coding or light emission that is easier to implement and interpret.
3Reliability
If power level identification circuits are added to all adapters, then reliability of power matching is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
Instead of implementing comprehensive power level detection and communication systems in all adapters, the patent applies partial action by using simpler identification circuits that provide sufficient power level information for safe operation. The circuit complexity is kept minimal while achieving the necessary reliability through strategic placement of identification features.
Solution Approach 2:
The patent uses cost-effective, simple identification components such as color-coded indicators or basic LED lights that can be easily manufactured and integrated. These simple, inexpensive components provide reliable power level identification without the need for complex and expensive sophisticated detection systems.
Data Source
AI summary
A power level identification circuit includes a power interface, a voltage conversion unit, a waveform detection unit, a signal pre-processing unit and a processing unit. The power interface receives electrical power and first signals indicating a level of the power. The voltage conversion unit receives the power from the power interface and converts the power. The waveform detection unit filters the power and obtains the first signals indicating power level. The signal pre-processing unit shapes the waveform of the first signals indicating power level and thereby generates second signals indicating power level. The processing unit identifies a level of the second signals indicating power level and switches to one of modes of the power level identification circuit corresponding to the identified level of the second signals indicating power level. A power level flag circuit and a power level supply system are also provided.