Display Controller Power Saving Mode via Dynamic Frequency Adjustment
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Solution Overview
Problem
Display devices face challenges in reducing power consumption, especially when the display area is exposed or rolled, which degrades the driving environment and interface conditions.
Innovation Solution
A display device with a controller that switches between normal and power-saving modes by adjusting driving frequency, resolution, data transmission rates, and memory usage, and interface configurations to minimize power consumption based on the display area's exposure or rollable function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display panel operates in normal mode with full driving frequency and resolution, then display quality is maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic mode switching between normal mode and power saving mode based on real-time detection of display area exposure. The controller adjusts driving frequency, resolution, and interface environment dynamically according to whether the display is fully exposed or partially covered, optimizing power consumption while maintaining appropriate display quality for each state
Solution Approach 2:
The patent changes multiple operating parameters including driving frequency (lowered in power saving mode), resolution (reduced when not fully exposed), and interface transmission rate (adjusted according to exposure state). These parameter changes enable power consumption reduction while maintaining acceptable display performance
2Use of energy by moving object
If the display area is partially exposed or rolled, then power consumption can be reduced, but the driving environment and interface conditions deteriorate
Solution Approach 1:
The patent adjusts multiple parameters including lowering driving frequency, reducing resolution, and modifying interface transmission rates based on display exposure detection. These coordinated parameter changes optimize the driving environment for power saving operation while maintaining functional display capability
Solution Approach 2:
The patent employs feedback mechanisms where the controller detects the exposure state of the display area and automatically adjusts operating parameters. This closed-loop control ensures the driving environment is optimized for the current display state, preventing degradation while enabling power savings
3Use of energy by moving object
If the driving frequency and resolution are lowered in power saving mode, then power consumption decreases, but data transmission rate and interface performance are reduced
Solution Approach 1:
The patent dynamically adjusts the interface environment and data transmission rate according to the display exposure state. When in power saving mode with reduced driving frequency and resolution, the interface transmission rate is proportionally adjusted to match the reduced data requirements, maintaining efficiency without unnecessary high-speed transmission
Solution Approach 2:
The patent coordinates changes in driving frequency, resolution, and interface transmission rate as a set of related parameters. This synchronized parameter adjustment ensures that data transmission rate is optimized for the current display performance level, reducing power consumption without creating interface bottlenecks
Data Source
AI summary
A display device includes a display panel configured to display images, a data driver configured to supply data voltages to the display panel, and a controller configured to control the data driver, wherein the controller operates in a normal mode having normal driving conditions and a power saving mode having driving conditions for reducing power consumption and lowers a driving frequency and an environment of an interface connected to the data driver as compared to a driving frequency and an interface environment in the normal mode when operating in the power saving mode.