Display Device Dynamic Timing Control for Power Optimization
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Solution Overview
Problem
The increasing demand for high-resolution display devices in various electronic devices leads to higher power consumption, particularly during the charging period of pixels with image data voltage, which can result in image quality degradation.
Innovation Solution
A display device with a display-driving circuit that adjusts the emission period and frame transition period of pixels based on image characteristics, such as still images, moving images, and screen transition images, while monitoring current and voltage levels to optimize charging periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixels are charged with image data voltage during the driving period, then image display function is achieved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the emission period and frame transition period adjustable based on image characteristics. The display-driving circuit dynamically changes the timing parameters - extending the emission period for still images to reduce charging frequency, and adjusting for moving images to maintain display quality. This dynamic adaptation resolves the contradiction by optimizing power consumption while preserving image display functionality across different content types.
Solution Approach 2:
The patent changes physical parameters (emission period duration, frame transition period timing) based on image characteristics analysis. By detecting whether displayed content is a still image or moving image, the system adjusts the charging period and emission timing parameters accordingly, reducing power consumption for still images while maintaining adequate charging for moving images to prevent quality degradation.
2Use of energy by moving object
If power consumption is reduced by adjusting emission period, then energy efficiency improves, but image quality may degrade due to insufficient pixel charging
Solution Approach 1:
The patent implements feedback by monitoring the actual charging status of pixels through current amount or voltage magnitude detection during the emission period. The display-driving circuit uses this feedback information to adjust the frame transition period and charging timing, ensuring that pixels receive adequate charge before emission. This closed-loop control prevents image quality degradation while maintaining reduced power consumption benefits.
Solution Approach 2:
The patent applies preliminary action by extending the frame transition period to provide sufficient charging time for pixels before the emission period begins. By ensuring pixels are fully charged in advance (particularly for still images with longer emission periods), the system prevents image quality issues during emission while maintaining lower overall power consumption through optimized timing.
3Use of energy by moving object
If frame period is delayed for still images, then power consumption is reduced, but display responsiveness may be affected
Solution Approach 1:
The patent applies dynamics by making the frame period adjustment conditional on image characteristics detection. The system dynamically switches between standard framing for moving images (maintaining responsiveness) and extended framing for still images (reducing power consumption). This dynamic adaptation resolves the contradiction by applying frame delay only when image content remains static, preserving responsiveness for changing content.
Data Source
AI summary
The present disclosure relates to a display device. According to one or more embodiments of the disclosure, a display device includes a display panel including a display area, pixels arranged in the display area, and a display-driving circuit configured to determine whether an image includes a still image or a video image, control a supply timing of a data voltage and a pixel-driving control signal to the pixels according to a determination result of the image, delay at least one frame period of a still image display period from one frame period of a video display period, and adjust an image display timing of a next frame in response to a change of a current amount or in a voltage magnitude.