Foldable Display Modulus Sensing for Low-Temperature Damage Prevention
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Solution Overview
Problem
Existing electronic devices with foldable displays face reliability issues due to unpredictable folding stresses that can lead to damage when folded beyond a certain modulus, particularly at low temperatures.
Innovation Solution
Incorporating a detection sensor, such as a piezoelectric sensor, to measure the modulus of the folding area and control the display panel to adjust images for temperature, preventing damage by displaying images that raise the device temperature above a safe threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the display panel is folded beyond a certain modulus, then the device can be compacted for portability, but the folding area may be damaged due to excessive stress
Solution Approach 1:
The detection sensor performs preliminary detection of the folding modulus before damage occurs. When the sensor detects that the folding modulus exceeds the preset threshold, it triggers the display controller to execute preliminary protective actions (displaying temperature adjustment images) to prevent folding area damage before excessive stress can cause harm.
Solution Approach 2:
The detection sensor continuously monitors the folding modulus and provides real-time feedback to the display controller. Based on this feedback, the display controller dynamically adjusts the display content to control the folding process, ensuring the folding area operates within safe stress limits while still achieving device compaction.
2Ease of operation
If the device is folded when the folding area is already stressed beyond safe modulus, then portability is maintained, but reliability of the foldable display deteriorates
Solution Approach 1:
The detection sensor and display controller work together to apply preliminary anti-action by detecting unsafe folding conditions before they lead to damage. When the folding modulus exceeds the threshold, the system preemptively displays temperature adjustment images to prevent further folding, thereby protecting the foldable display reliability while the user maintains device portability through alternative means.
Solution Approach 2:
The device performs self-protection through the integrated detection sensor and display controller system. The sensor autonomously monitors folding conditions, and the controller automatically executes protective measures without user intervention, ensuring the foldable display maintains high reliability while the device remains portable.
3Strength
If temperature adjustment images are displayed continuously, then the folding area temperature can be raised to reduce stress, but energy consumption increases
Solution Approach 1:
The display controller displays temperature adjustment images periodically or intermittently based on detection sensor feedback rather than continuously. When the folding modulus approaches the threshold, the controller activates the temperature adjustment display; when the modulus is within safe limits, the controller stops displaying these images, thereby reducing energy consumption while maintaining adequate stress resistance in the folding area.
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
Prevents damage to foldable electronic devices by ensuring they are not unfolded when the folding stress exceeds a safe modulus, thereby enhancing the device's reliability and longevity.
Implementation Method 1
the detection sensor may include a piezoelectric sensor
Data Source
AI summary
An electronic device includes a display panel including a folding area and a non-folding area adjacent to the folding area, a display controller which controls a driving of the display panel, and a detection sensor disposed adjacent to the folding area and which measures a modulus of the folding area in a folded state of the display panel. The display controller controls the display panel based on a measured modulus in a way such that an image for temperature adjustment is displayed on the display panel.