Display Driver Circuit for Image-Based Afterimage and Flicker Control
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Solution Overview
Problem
Existing electronic devices face issues with afterimages and flickering due to sudden changes in refresh rates, leading to reduced image quality and increased power consumption.
Innovation Solution
The electronic device adaptively adjusts the refresh rate based on the type of image displayed, using display driver circuitry to identify differences between images and request retransmissions or image transmissions from the processor to minimize afterimages and flickering.
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 system dynamically adjusts the refresh rate based on image content analysis. When image differences exceed a threshold, the refresh rate is increased to reduce afterimages and flickering. When images are stable, the refresh rate is decreased to save power. This dynamic adaptation resolves the contradiction by making refresh rate flexible rather than fixed.
Solution Approach 2:
The patent changes the refresh rate parameter based on detected image differences. By monitoring whether consecutive images differ beyond a threshold and adjusting the refresh rate accordingly, the system optimizes both image quality and power consumption. This parameter adaptation allows the system to maintain high quality when needed while conserving energy during stable display periods.
2Reliability
If the refresh rate is frequently adjusted to adapt to different image types, then image quality is improved, but device complexity increases
Solution Approach 1:
The display system is segmented into independent functional modules: an image difference detection module that compares consecutive frames, a threshold evaluation module that determines if changes exceed acceptable limits, and a refresh rate control module that adjusts timing parameters. This segmentation simplifies the overall complexity by breaking down the control logic into discrete, manageable components.
Solution Approach 2:
The system implements a feedback mechanism where image differences are continuously monitored and fed back to the refresh rate controller. When image changes exceed a threshold, the feedback triggers a refresh rate adjustment. This closed-loop control automates the adaptation process, reducing the need for complex manual control logic while maintaining high image quality.
3Reliability
If image retransmission is requested frequently to maintain image quality, then afterimages are reduced, but data transmission overhead increases
Solution Approach 1:
Instead of requesting retransmission for every image change, the system applies partial action by only triggering retransmission requests when image differences exceed a predetermined threshold. This selective approach reduces unnecessary data transmission overhead while still effectively preventing afterimages and flickering in cases where quality degradation would occur.
Data Source
AI summary
An electronic device may include a processor. The electronic device may include a display including a display drive circuit and a display panel. The electronic device may include a first interface connecting the processor and the display drive circuit. The electronic device may include a second interface connecting the processor and the display drive circuit. The display drive circuit may be configured to display, on the display panel, a first image received from the processor through the first interface. The display drive circuit may be configured to display, on the display panel, a second image following the first image and received from the processor through the first interface. The display drive circuit may be configured to determine, while the second image is being displayed on the display panel, whether the second image is at least partially different from the first image maintained on the display panel for a longer period of time than a reference time according to at least one display of the first image including the display of the first image, the determination being made on the basis of the first image. The display drive circuit may be configured to provide a signal for requesting retransmission of the second image to the processor through the second interface in response to the second image which is at least partially different from the first image.