Overheat Protection for Hand-Held Devices Using Cold Zone Temperature
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing overheat protection systems for hand-held electronic devices rely solely on absolute temperature, leading to poor adaptability and frequent triggering, especially in varying ambient temperatures.
Innovation Solution
The method involves obtaining a cold zone temperature from a point away from heat-emitting elements and selecting an overheat protection scheme based on both cold and hot zone temperatures, using multiple thresholds to determine ambient temperature sections and trigger corresponding subschemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If overheat protection is triggered based on absolute temperature of reference hot point only, then protection threshold is simple to set, but adaptability to different ambient temperatures is poor
Solution Approach 1:
The patent divides the temperature monitoring system into two independent parts: a cold zone collection point for ambient temperature detection and a hot zone collection point for device temperature detection. This segmentation allows each sensor to focus on its specific function, improving adaptability without significantly increasing overall system complexity.
Solution Approach 2:
The cold zone temperature acts as an intermediary parameter that mediates between the ambient environment and the hot zone temperature threshold. By introducing this intermediate measurement, the system can dynamically adjust protection thresholds based on environmental conditions, resolving the contradiction between simple threshold setting and environmental adaptability.
2Reliability
If absolute temperature threshold is used for overheat protection, then protection scheme is simple to implement, but frequent triggering occurs in high ambient temperature environments
Solution Approach 1:
The patent transforms the static absolute temperature threshold into a dynamic threshold that adapts to ambient conditions. The hot zone threshold is no longer fixed but varies based on the cold zone temperature measurement, allowing the system to maintain reliable protection while reducing false triggers in high ambient temperature environments.
Solution Approach 2:
The system changes the protection threshold parameter dynamically based on ambient temperature measurements. When ambient temperature rises, the hot zone threshold is adjusted upward accordingly, preventing unnecessary protection triggering while maintaining safety when truly needed, thus balancing reliability with device usage continuity.
3Adaptability or versatility
If single temperature point monitoring is used, then system complexity is low, but adaptability to different use scenarios is poor
Solution Approach 1:
The monitoring system is segmented into two distinct measurement points: cold zone for ambient temperature and hot zone for device temperature. This segmentation enables the system to distinguish between environmental heat and device-generated heat, improving adaptability to different use scenarios while keeping each individual sensor simple.
Solution Approach 2:
The patent adds a new dimension to temperature monitoring by measuring both ambient temperature (cold zone) and device temperature (hot zone) simultaneously. This two-dimensional approach provides comprehensive thermal information without significantly increasing system complexity, enabling better adaptation to various use scenarios.
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 enhances adaptability by preventing premature or frequent overheat protection triggers, ensuring the device operates effectively in different environments, including high ambient temperatures.
Implementation Method 1
The cold zone collection point is a thermistor that is connected in series between a current source and a ground cable
Data Source
AI summary
The present invention provides an overheat protection method and apparatus for a hand-held electronic device, and an electronic hand-held device. The method includes: obtaining a cold zone temperature from a cold zone collection point, where the cold zone collection point is arranged in a position, away from a heat emitting element, of the hand-held electronic device; and selecting an overheat protection scheme that corresponds to the cold zone temperature and a hot zone temperature. In the overheat protection technology of a hand-held electronic device provided in embodiments of the present invention, a cold zone temperature is obtained, and an overheat protection scheme is selected by considering the cold zone temperature, so that overheat protection of the hand-held electronic device can put multipoint temperatures into consideration and is highly adaptable.