Flexible Display Heating Control for Low-Temperature Crack Prevention
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Solution Overview
Problem
Flexible display devices are prone to cracking when deformed in low-temperature environments due to increased modulus and decreased flexibility of materials, leading to potential product defects.
Innovation Solution
Incorporating a temperature sensor and a heating part in the display device that operates when the temperature drops below a predetermined level, maintaining the folding area temperature and preventing cracking by adjusting the heating part's operation based on temperature measurements and user authentication information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the display device is operated in a low-temperature environment, then the device can function in cold conditions, but the materials increase in modulus and decrease in flexibility causing cracks when deformed
Solution Approach 1:
The heating part changes the temperature parameter of the folding area to maintain it above a predetermined threshold. By actively controlling the temperature parameter, the material properties (modulus and flexibility) are maintained within acceptable ranges, preventing crack formation during deformation in cold environments
Solution Approach 2:
The heating part operates in advance to prevent the folding area temperature from dropping to levels that would cause material brittleness. By maintaining temperature before deformation occurs, the system preemptively counteracts the harmful effect of low temperature on material flexibility and crack resistance
2Reliability
If the heating part is continuously operated to maintain temperature, then cracking is prevented, but power consumption increases
Solution Approach 1:
The temperature sensor continuously monitors the folding area temperature and provides feedback to control the heating part operation. The heating part is activated only when the temperature falls below the predetermined threshold, creating a closed-loop control system that maintains reliability while minimizing unnecessary energy consumption
Solution Approach 2:
Instead of continuous operation, the heating part operates periodically based on temperature conditions. The heating element cycles on and off according to the temperature sensor readings, maintaining the required temperature range while reducing overall power consumption compared to continuous operation
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
The solution effectively prevents cracking in the display device components by maintaining the folding area temperature, enhancing durability and reducing power consumption by only activating the heating part during state changes.
Implementation Method 1
a temperature sensor disposed between the window and case member to sense a temperature
Implementation Method 2
a heating part disposed on an area which overlaps the folding area in a plan view. The heating part is configured to operate when a measurement temperature measured in the temperature sensor is less than a predetermined temperature
Data Source
AI summary
A display device includes a display panel on which a folding area is defined, a case member, a temperature sensor for sensing a temperature, and a heating part disposed on an area overlapping the folding area in a plan view to operate when a measurement temperature measured in the temperature sensor is less than a predetermined temperature.