Display Device Dynamic Frequency Control for Noise and Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face increased power consumption due to high operating frequencies, and existing technologies lack efficient methods to dynamically adjust frequencies based on image types, leading to potential noise generation between the display panel and input sensing layers.
Innovation Solution
A display device with an input sensing layer and a controller system that adjusts the operating frequency of the display panel and input sensing layer based on synchronization signals, allowing for two modes of operation (high and low frequency) depending on the image type, thereby reducing noise and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the display device operates at a high frequency to display images, then the image display performance is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic frequency adjustment by switching between first and second operating frequencies based on image types. The display controller dynamically changes the operating frequency of the display panel and input sensing layer - using a higher first frequency for images requiring fast response (like video) and a lower second frequency for static or less demanding images, thereby optimizing power consumption while maintaining necessary display performance
Solution Approach 2:
The patent changes the operating frequency parameter based on image characteristics. The display controller analyzes image types and adjusts the frequency parameter accordingly - switching between different frequency values to match the requirements of different image content, thus reducing power consumption when high frequency is not necessary while maintaining image quality when needed
2Speed
If the display device operates at a high frequency, then the image display performance is improved, but noise generation between display panel and input sensing layer increases
Solution Approach 1:
The patent dynamically adjusts the operating frequency based on image requirements, switching between first and second frequencies. By lowering the frequency to the second level when high-speed performance is not needed, the patent reduces noise generation between the display panel and input sensing layer while maintaining adequate display performance for the current image type
3Use of energy by moving object
If the operating frequency is reduced to save power, then power consumption is reduced, but the ability to handle fast-changing images deteriorates
Solution Approach 1:
The patent implements dynamic frequency switching that adapts to different image types. When fast-changing images (like video) are detected, the system switches to the first higher frequency to maintain good image quality and response time. When images are static or less demanding, it switches to the second lower frequency to reduce power consumption, thus achieving both energy savings and maintained adaptability
Solution Approach 2:
The patent changes the operating frequency parameter based on image characteristics analysis. The display controller adjusts the frequency parameter dynamically - using higher frequencies for images requiring fast response and lower frequencies for less demanding images, thereby optimizing the balance between power consumption and image handling capability
Data Source
AI summary
Disclosed is a display device including a display panel, an input sensing layer, a display controller that receives a vertical synchronization signal and a horizontal synchronization signal and controls an operation of the display panel depending on the vertical synchronization signal and the horizontal synchronization signal, and a sensing controller that receives the vertical synchronization signal and the horizontal synchronization signal and generates a driving control signal for driving the input sensing layer. One frame of the vertical synchronization signal includes a first vertical section and a second vertical section in which the display controller transmits a data signal to the display panel. The sensing controller determines an operating frequency of the driving control signal based on a horizontal synchronization signal, which is included in a first horizontal section overlapping with the first vertical section, in the horizontal synchronization signal.