Reduced Refresh Rate Display Using Leaky Switches
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels in electronic devices consume significant power, particularly in portable devices, due to high refresh rates, which contribute to battery drain and increased power consumption.
Innovation Solution
Implementing a reduced refresh rate display system using a leaky switch and compensating circuitry to control storage capacitors, allowing for different voltages to be provided to each display element to achieve a refresh rate less than 50 Hertz, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a high refresh rate is used to maintain image quality, then image quality is improved, but power consumption increases
Solution Approach 1:
The patent implements different refresh rates for different display elements based on their content stability. Stable elements (e.g., background areas) are refreshed at lower rates while dynamic elements (e.g., video content) receive higher refresh rates, achieving periodic action with variable frequency to reduce overall power consumption while maintaining image quality where needed
Solution Approach 2:
The patent applies different refresh rate strategies to different spatial regions and display elements within the same display panel. By identifying which specific elements require high refresh rates and which can tolerate lower rates, the system optimizes power consumption locally rather than uniformly across the entire display
2Use of energy by moving object
If a reduced refresh rate is used to lower power consumption, then power consumption is reduced, but image quality may degrade
Solution Approach 1:
The patent dynamically adjusts the refresh rate parameter for different display elements based on content analysis. By changing the refresh rate parameter selectively - lowering it for static content and maintaining higher rates for dynamic content - the system reduces power consumption without degrading perceived image quality
Solution Approach 2:
The display system automatically determines which elements require high refresh rates by analyzing content characteristics, eliminating the need for external intervention or user configuration. The system self-regulates refresh rates to optimize the balance between power consumption and image quality
3Use of energy by moving object
If different voltages are provided to each display element to achieve reduced refresh rate, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent divides the display panel into multiple independently controllable elements or regions, each capable of operating at different refresh rates. This segmentation allows selective power management where each segment can be optimized independently, reducing overall power consumption while using standardized control mechanisms to manage complexity
Data Source
AI summary
In one embodiment, a display system includes a display panel having a plurality of display elements, a scan driver to control a leaky switch to select a storage capacitor of a display element of the plurality of display elements to receive a data signal, and a data driver to provide the data signal to the storage capacitor when the leaky switch is in an on state at each of an on voltage to illuminate the display element and an off voltage and to hold the on voltage at an input of the leaky switch when the leaky switch is in an off state.