Flexible Display Curvature Control via Photo Sensor Feedback
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Solution Overview
Problem
Existing display devices, particularly flexible ones, lack effective methods for dynamically controlling curvature in response to user needs, such as reducing glare from incident light and mitigating impact during free falls, while also considering battery charge levels.
Innovation Solution
A method and device that utilize a curvature change member, controlled by a sensor unit including a photo sensor and acceleration sensor, to adjust the curvature of a flexible display panel based on light intensity, acceleration, and battery charge, using ionic electroactive polymers or artificial muscles for contraction and elongation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display device is made bendable to meet user requirements, then adaptability is improved, but structural stability deteriorates
Solution Approach 1:
The curvature change member is divided into multiple independent curvature change units that can operate separately. Each unit corresponds to a specific region of the display panel and can be controlled independently to change curvature in that region, allowing localized bending without compromising overall structural stability
Solution Approach 2:
The display device transitions from a static flat structure to a dynamic structure that can change curvature in real-time. The curvature change units can be activated or deactivated based on external conditions (light intensity, acceleration, battery charge level), enabling the display to adapt its shape dynamically while maintaining structural integrity when not in use
2Object-affected harmful factors
If curvature control is added to respond to light conditions, then glare prevention is improved, but device complexity increases
Solution Approach 1:
The curvature change units serve multiple functions: they prevent glare by changing display curvature in response to light intensity, mitigate impact during falls, and indicate battery charge levels. This multi-functionality reduces the need for separate systems for each function, thereby limiting the increase in device complexity
Solution Approach 2:
The system uses sensors (photo sensors, acceleration sensors, battery sensors) to detect environmental conditions and automatically adjusts the curvature of the display panel through the curvature change units. This automatic feedback control eliminates the need for manual intervention and simplifies the user interface while effectively preventing glare
3Adaptability or versatility
If multiple sensors and curvature units are added for comprehensive control, then functionality is improved, but manufacturing cost increases
Solution Approach 1:
Multiple sensing functions (light detection, acceleration detection, battery monitoring) are integrated into a unified control system that manages the curvature change units. By merging these functions into a single control architecture, the patent reduces the need for separate control circuits and simplifies the manufacturing process, thereby limiting cost increases despite enhanced functionality
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 dynamic curvature control to prevent glare, mitigate impact during falls, and adjust display shape based on battery charge, enhancing user experience and device durability.
Implementation Method 1
measuring an amount of light incident to the flexible display panel by using a photo sensor
Implementation Method 2
The plurality of curvature change members may include an ionic electroactive polymer or an artificial muscle including an electroactive polymer
Implementation Method 3
measuring acceleration of the display device by using an acceleration sensor; measuring an acceleration direction of the display device
Data Source
AI summary
A method for controlling a curvature of a display device as a control method of the curvature of the display device including a flexible display panel, a curvature change member, a controller, and a photo sensor includes: measuring an amount of a light incident to the flexible display panel by using a photo sensor; confirming a position of a part where the amount of the measured light is more than a predetermined reference value in the flexible display panel when the amount of the measured light is more than the reference value; and changing the curvature around the part where the amount of the measured light is more than the reference value in the flexible display panel by using the curvature change member.