Display Driver Transmission Timing for Adaptive Refresh Switching
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Solution Overview
Problem
Existing electronic devices face challenges in efficiently managing refresh rates to balance power consumption and image quality, leading to issues such as afterimages and flickering, particularly when transitioning between different refresh rates.
Innovation Solution
The electronic device adaptively adjusts refresh rates by executing multiple or single image transmissions based on time length and refresh rate comparisons, using display driver circuitry to manage power consumption and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the refresh rate is increased to reduce afterimages and flickering, then image quality is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic refresh rate adjustment by detecting image content characteristics (static vs. dynamic) and adaptively changing the refresh rate accordingly. The display driver circuitry transitions from a fixed refresh rate to a variable refresh rate system that adjusts in real-time based on content analysis, resolving the contradiction between maintaining high image quality and reducing power consumption.
Solution Approach 2:
The patent changes the refresh rate parameter based on image content detection. When static images are detected, the refresh rate is lowered to reduce power consumption, while dynamic images trigger higher refresh rates to maintain image quality. This parameter adaptation resolves the technical contradiction by making the system responsive to actual display needs rather than operating at a constant refresh rate.
2Use of energy by moving object
If the refresh rate is decreased to reduce power consumption, then energy efficiency is improved, but afterimages and flickering occur
Solution Approach 1:
The patent employs feedback mechanisms where the display driver circuitry continuously monitors image content characteristics and adjusts the refresh rate accordingly. The detection of image changes feeds back to the control logic, which then modifies the refresh rate to prevent afterimages and flickering while maintaining energy efficiency, resolving the contradiction between power savings and image quality.
Solution Approach 2:
The system dynamically adjusts the refresh rate based on real-time image content analysis. Rather than operating at a fixed low refresh rate that causes visual artifacts, the system transitions to higher refresh rates when dynamic content is detected, thereby preventing afterimages and flickering while maintaining overall energy efficiency through selective rate adjustment.
3Reliability
If multiple transmissions are executed within a time period to improve image display, then image quality is enhanced, but the complexity of transmission control increases
Solution Approach 1:
The patent segments the image transmission process into multiple discrete transmissions within a single refresh time period. Instead of transmitting the entire image in one go, the image data is divided and transmitted in multiple segments, allowing for improved image quality through incremental updates while the control complexity is managed through systematic segmentation logic.
Data Source
AI summary
An example electronic device may include a processor; a display driving circuit; and a display panel. The processor may be configured to identify, in response to acquiring a second image following a first image displayed on the display panel, the time length between a first timing at which transmission of the first image to the display driving circuit started for the display of the first image, and a second timing which is the start timing of a time period corresponding to a refresh rate for the second image; display the second image on the display panel using the display driving circuit by executing multiple transmissions of the second image to the display driving circuit within the time period from the second timing, based on the time length that is longer than or equal to a reference length; and display the second image on the display panel using the display driving circuit by executing a single transmission of the second image to the display driving circuit within the time period from the second timing, based on the time length that is shorter than the reference length.