Display Driver IC Power Segmentation for OPR-Based Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable electronic devices face challenges in reducing power consumption, especially in display modes that require low power usage without compromising image quality or display functionality.
Innovation Solution
The implementation of a display driving method that determines the on-pixel ratio (OPR) value of image data to selectively control pixel power supply, using either a power-efficient pixel power supply module or a more power-consuming pixel power supplying circuit, and adjusts the frame rate of the image signal based on the OPR value to minimize battery consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a pixel power supplying circuit is used to supply power to all pixels, then the display can operate in full-color mode with high image quality, but power consumption increases
Solution Approach 1:
The pixel power supply system is segmented into two distinct modules: a first pixel power supply module for supplying first power to pixels, and a second pixel power supply module for supplying second power to pixels. The controller selectively activates one module based on the OPR value, dividing the power supply function into separate specialized units to optimize for either power efficiency or image quality depending on conditions.
Solution Approach 2:
The system dynamically switches between different power supply modes based on real-time OPR value detection. When OPR is below the threshold, the system uses the first pixel power supply module with first frame rates; when OPR exceeds the threshold, it switches to the second pixel power supply module with second frame rates, making the power supply adaptive to current display requirements.
2Use of energy by moving object
If the frame rate is reduced to save power, then battery life extends, but display responsiveness and image quality may deteriorate
Solution Approach 1:
The system changes the frame rate parameter dynamically based on the OPR value. When operating in power-saving mode (OPR below threshold), it applies first frame rates that are lower than the second frame rates used when OPR exceeds the threshold. This parameter adjustment allows the system to optimize power consumption while maintaining adequate display performance for the current content type.
3Duration of action of moving object
If always-on display mode is enabled for low-power applications, then battery life extends, but power consumption cannot be reduced further
Solution Approach 1:
The display maintains continuous operation (always-on mode) by using the first pixel power supply module that provides sufficient power for basic display functionality without requiring full power. The system continuously monitors OPR values and maintains display operation with optimized power consumption, enabling extended battery life while keeping the display functional for low-power applications.
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
A display driver integrated circuit is disclosed. The display driver integrated circuit includes panel signal supply circuitry configured to supply an image signal corresponding to image data to a panel, pixel power supply circuitry configured to supply pixel power to a pixel that receives the image signal, and a controller configured to control the pixel power supply circuitry to supply the pixel power.