Display Timing Controller Standby Mode Power Optimization
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Solution Overview
Problem
High resolution display devices face increased power consumption due to higher driving frequencies compared to input signals, which is not efficiently managed by existing technologies, particularly in moving image modes.
Innovation Solution
A display apparatus and method that utilize a timing controller to generate display synchronization and standby enable signals, allowing data and gate drivers to operate only during image frames and not during black frames, thereby reducing power consumption by employing a Media Buffer Optimization (MBO) mode that masks synchronization signals during black frames and drives the display in standby mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the display device operates at a higher driving frequency to display moving images smoothly, then the image quality and smoothness are improved, but the power consumption increases
Solution Approach 1:
The patent applies periodic action by alternately operating the display device between active display periods and standby periods. During standby periods (black frames), the synchronization signal is masked and drivers are deactivated, while during active periods (image frames), normal operation resumes. This periodic on-off operation reduces average power consumption while maintaining smooth moving image display capability.
Solution Approach 2:
The patent implements dynamics by making the driving frequency adaptive rather than fixed. The display device dynamically adjusts its operation based on the type of content being displayed - using full driving frequency for still images and employing frequency reduction with standby periods for moving images. This dynamic adjustment optimizes power consumption based on actual display needs.
2Loss of time
If the data driver and gate driver operate continuously to maintain display readiness, then the response time is reduced, but the power consumption increases
Solution Approach 1:
The patent applies periodic action by controlling the data driver and gate driver to operate only during image frames and enter standby mode during black frames. The drivers are periodically activated and deactivated in synchronization with the display refresh cycle, reducing power consumption while maintaining readiness for the next image frame.
Solution Approach 2:
The patent implements preliminary action by preparing the display system in advance during black frames - masking the synchronization signal and positioning the system in standby mode before the next image frame arrives. This preliminary preparation ensures rapid response when the next image needs to be displayed while minimizing active operation time.
3Manufacturing precision
If the display device processes every incoming frame to maintain image accuracy, then the image quality is preserved, but the power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating processing requirements for different types of frames. Image frames receive full processing attention to maintain image quality, while black frames are handled differently - the synchronization signal is masked and drivers are put in standby mode. This localized quality approach optimizes power consumption by applying full processing only where necessary.
Solution Approach 2:
The patent implements taking out by extracting and removing the processing operations during black frames. Instead of continuously processing every incoming frame, the system extracts the essential processing activities and applies them only during image frames, while eliminating processing during black frames by masking synchronization signals and activating standby mode.
Data Source
AI summary
A display apparatus includes a timing controller configured to generate a display synchronization signal and a standby enable signal during a moving image mode, wherein the display synchronization signal is generated using an original synchronization signal and the standby enable signal corresponds to a preset frame period of the display synchronization signal. The display apparatus includes a data driver to block a data voltage from being provided to a data line in response to the standby enable signal, and a gate clock generator configured to block a gate clock signal from being outputted in response to the standby enable signal.