Flexible Display Driving Frequency Adjustment for Power Optimization
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Solution Overview
Problem
Current display panels face challenges in reducing power consumption while maintaining display quality, particularly in foldable devices where the folded angle affects visibility and image rendering.
Innovation Solution
A flexible display apparatus with a driving controller that adjusts the driving frequencies of connected display areas based on the folded angle, distinguishing between static and moving images and using flicker values to optimize power usage and prevent image flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display panel operates at a high driving frequency to maintain display quality, then the image stability and visibility are improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamic frequency adjustment by changing the driving frequency of the display panel based on the folded angle. When the folded angle is greater than the threshold angle (display areas visible), the panel operates at a first driving frequency to maintain display quality. When the folded angle is equal to or less than the threshold angle (display areas not visible), the panel operates at a second driving frequency lower than the first frequency, thereby reducing power consumption while maintaining acceptable display performance.
2Use of energy by moving object
If the display panel reduces operating frequency to minimize power consumption, then energy usage is reduced, but image flicker and display quality deteriorate
Solution Approach 1:
The system dynamically adjusts the driving frequency based on real-time detection of the folded angle. By switching between first and second driving frequencies according to whether the display areas are visible or not, the system optimizes the balance between power consumption and display quality, avoiding continuous operation at low frequency which would cause flicker.
Solution Approach 2:
The patent employs a folded angle detection mechanism that provides feedback to the driving controller. The controller uses this feedback to determine the appropriate driving frequency, creating a closed-loop control system that automatically adjusts operating parameters based on actual display conditions, thereby preventing flicker while minimizing power consumption.
3Device complexity
If the display panel operates at a uniform frequency across all display areas, then the control system is simple, but power consumption cannot be optimized based on visibility
Solution Approach 1:
The patent divides the display panel into multiple display areas (first display area and second display area) that can be independently controlled. Each display area can operate at different driving frequencies based on its visibility status, allowing the system to optimize power consumption for each segment individually while maintaining a relatively simple overall control architecture.
Data Source
AI summary
A flexible display apparatus includes a first body portion, a second body portion and a driving controller. The first body portion includes a first display area, and the second body portion includes a second display area. The second display area is connected to the first display area. The driving controller is configured to determine a first driving frequency of the first display area and a second driving frequency of the second display area based on a folded angle between the first body portion and the second body portion along a folded line disposed between the first body portion and the second body portion.