Display Temperature Estimation via Image Analysis
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Solution Overview
Problem
Existing display technologies in devices like smartphones generate excessive heat, which can lead to discomfort and potential damage due to heat radiation towards sensitive components, and current solutions require additional components for temperature management, increasing device bulkiness.
Innovation Solution
A method to estimate display temperature by evaluating heat generation and radiation responses using various test patterns, storing this information as a table or mathematical formula, and using image information such as histograms to determine heat behavior, allowing for temperature estimation without dedicated sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensors and current measuring systems are added to manage display heat, then temperature monitoring capability is improved, but device complexity and bulkiness increase
Solution Approach 1:
The display device uses its own existing display components and controllers to measure temperature through electrical resistance changes, rather than requiring separate dedicated temperature sensing components. The display controller leverages the display's inherent electrical characteristics to perform self-diagnosis of temperature conditions.
Solution Approach 2:
The display controller performs multiple functions including both display control and temperature measurement using the same hardware components. The electrical resistance measurement capability, originally part of the display driving mechanism, is repurposed to also serve as a temperature sensing function.
2Reliability
If multiple components are added for heat management, then temperature control capability is improved, but device thickness increases
Solution Approach 1:
The temperature measurement function is merged with the existing display controller and display structure. No separate temperature sensing components are added; instead, the display system itself is used to perform both display and temperature monitoring functions, maintaining thin device profile.
Solution Approach 2:
The display device monitors its own temperature using its existing electrical components without requiring additional external sensors or cooling mechanisms that would increase device thickness.
3Temperature
If display brightness is reduced to manage heat, then temperature control is improved, but display quality deteriorates
Solution Approach 1:
The system continuously monitors temperature through electrical resistance measurements and provides feedback to the display controller. Based on this feedback, the controller can make informed decisions about adjusting display parameters to manage temperature while maintaining optimal display quality within acceptable ranges.
Solution Approach 2:
The display controller dynamically adjusts display parameters based on real-time temperature measurements rather than using fixed brightness reduction. This allows for optimized balance between temperature management and display quality by making adaptive adjustments based on actual thermal conditions.
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
Enables efficient temperature management in devices by reducing the need for additional components, resulting in a thinner and more compact design while maintaining effective heat dissipation and user comfort.
Implementation Method 1
A display arranged on a device may generate heat, and raise the temperature of the device, the display or radiate it towards the user
Implementation Method 2
the display or radiate it towards the user
Implementation Method 3
Temperature sensors are known to measure temperature from the device
Data Source
AI summary
A temperature of a display is evaluated from the image displayed. The device may be tested with various images or with various test patterns in order to obtain the heat generation response related to the image. For example, a bright image may generate more heat than a dark image. The heat generation response behavior is stored into a device memory. A heat radiation response behavior is also obtained with various test patterns. The display temperature is estimated using an image to be displayed with the predetermined heat generation and heat radiation responses. The ambient temperature may be used to improve the estimation.