Electronic Apparatus Thermal Management via Self-Service Temperature Sensing
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Solution Overview
Problem
Portable electronic devices face heat dissipation challenges, leading to increased noise and user discomfort due to temperature increases, and existing solutions are costly as they require separate temperature measurement for both the device and environment.
Innovation Solution
An electronic apparatus with a temperature measurement section and environmental temperature calculation section that uses a relational equation to estimate environmental temperature based on temperature differences measured at the heat generation source and casing, allowing for power control and user warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the temperature of the heat generation source is directly measured to ensure user comfort and prevent thermal burns, then user safety and comfort are improved, but the cost of the electronic apparatus increases due to requiring additional temperature measurement means
Solution Approach 1:
The heat generation source itself performs the temperature measurement function by serving as its own temperature sensor. The imaging device measures its own temperature without requiring a separate temperature measurement means, thereby reducing cost while still enabling temperature-based control to prevent user discomfort and thermal burns.
Solution Approach 2:
The imaging device serves multiple functions: it acts as both the heat generation source and the temperature measurement means. This multi-functionality eliminates the need for dedicated temperature sensors, reducing overall device complexity and cost while maintaining the capability to monitor temperature for user safety.
2Temperature
If heat dissipation structures are added to release heat to the casing, then heat dissipation performance is improved, but the casing temperature becomes too high causing user discomfort or thermal burns
Solution Approach 1:
The operating state of the heat generation source is dynamically adjusted based on real-time temperature measurements. When the temperature exceeds a predetermined threshold, the system stops or reduces operation, creating a dynamic control mechanism that prevents excessive heat transfer to the casing while maintaining heat dissipation performance during normal operation.
Solution Approach 2:
The system implements a feedback control mechanism where the temperature measured by the imaging device is continuously monitored and used to control the operating state of the heat generation source. This closed-loop feedback prevents the casing temperature from rising to uncomfortable or dangerous levels while maintaining effective heat dissipation.
3Measurement precision
If separate temperature measurement means are added to measure environmental temperature, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The imaging device measures its own temperature without requiring external temperature measurement means. By using the heat generation source itself as the sensor, the system achieves temperature measurement functionality while avoiding the cost and complexity of separate environmental temperature measurement devices.
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
Effectively manages heat dissipation and user comfort by calculating environmental temperature and controlling device operation, preventing noise and thermal burns while reducing costs by eliminating the need for separate environmental temperature measurement.
Implementation Method 1
the imaging device measures its own temperature without requiring separate temperature measurement means
Implementation Method 2
heat transfer to a casing through a substrate
Data Source
AI summary
An electronic apparatus includes: a temperature measurement section that measures a temperature of a heat generation source generating heat by consuming power or a temperature of an inner position of a casing of which the temperature changes due to the heat generation of the heat generation source; and an environmental temperature calculation section that calculates a temperature which is calculated using a predetermined relational equation that is different in accordance with a model from a difference between a first temperature measured by the temperature measurement section at a point in time when the heat generation source starts consuming a predetermined amount of power and a second temperature measured by the temperature measurement section at a point in time after the passage of a predetermined period from the start of consumption of a predetermined amount of power by the heat generation source as an environmental temperature in an environment where the casing is placed.