Foldable Display Panel Frequency Segmentation for Power Reduction
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Solution Overview
Problem
Existing display devices lack an efficient method to manage power consumption based on their state, particularly when transitioning between unfolded and folded configurations, leading to unnecessary energy usage.
Innovation Solution
A display device with a display panel that includes multiple areas, where the panel driver adjusts driving frequencies and sensing modes depending on the device's state, using a first driving frequency for one area and a lower frequency for another area when folded, and alternating sensing modes for different input types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display panel is driven at a high driving frequency in both areas when folded, then the image quality and responsiveness are maintained, but the power consumption increases unnecessarily
Solution Approach 1:
The display panel is divided into a first area and a second area, with the first area (containing the folding line) driven at a lower frequency and the second area (non-folding area) driven at a higher frequency. This segmentation allows each region to operate at an appropriate frequency for its functional requirements, reducing overall power consumption while maintaining performance where needed.
Solution Approach 2:
Different driving frequencies are applied to different regions of the display panel based on their specific requirements. The non-folding area maintains high frequency for optimal image quality, while the folding area uses lower frequency to reduce power consumption during folding operations, implementing local quality optimization.
2Adaptability or versatility
If the sensing panel is continuously driven in a single sensing mode, then the input detection is simplified, but the adaptability to different input types (finger and pen) is reduced
Solution Approach 1:
The sensing panel dynamically switches between first and second sensing modes based on the detected input type. When a finger touch is detected, the first sensing mode is activated; when a pen input is detected, the second sensing mode is activated. This dynamic adaptation enables the system to handle different input types effectively without requiring complex simultaneous processing.
Solution Approach 2:
The sensing panel alternates between different sensing modes in a periodic manner, switching between first sensing mode and second sensing mode at predetermined time intervals. This periodic action allows the system to efficiently detect both finger touches and pen inputs by cycling through different detection configurations.
Data Source
AI summary
A display device includes a display panel including a display area having first and second areas for displaying an image. The display panel is positioned in first and second states. A sensing panel is disposed on the display panel and includes sensing electrodes. A panel driver drives the display panel. A sensor driver drives the sensing panel. The panel driver drives the first and second areas at a first driving frequency when the display panel is in a first state and drives the first area at the first driving frequency and drives the second area at a second driving frequency lower than the first driving frequency when the display panel is in the second state. The sensor driver drives the first and second areas in a sequence that includes the first and second sensing modes each for a predetermined time, when the display panel is in the first state.