Display Data Driver Power Cut-Off and Standby Mode Control
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Solution Overview
Problem
Display apparatuses face high power consumption due to the continuous operation of data drivers, even when the image frame rate is low, leading to inefficient energy usage.
Innovation Solution
The display apparatus incorporates a data driver with a voltage generator, buffer, driving voltage switch, bias controller, and timing controller that selectively operates in power cut-off or stand-by modes based on the image frame rate, reducing power consumption by cutting off analog driving voltage or reducing bias current during low frame rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data driver continuously operates to maintain display functionality, then display performance is ensured, but power consumption increases significantly
Solution Approach 1:
The data driver dynamically adjusts its operating mode based on the image frame rate. When the frame rate is low (e.g., 1Hz or 10Hz for still images), the driver switches to power-saving modes (cut-off or stand-by). When the frame rate is high (e.g., 60Hz for moving images), it operates in normal mode. This dynamic adaptation resolves the contradiction by matching power consumption to actual display needs.
Solution Approach 2:
The invention changes the operational parameters of the data driver based on detected frame rates. By monitoring the frame rate parameter and adjusting the driver's operating state accordingly, the system achieves optimal balance between display performance and power consumption for different usage scenarios.
2Speed
If the data driver operates in normal mode to ensure responsive display updates, then display responsiveness is maintained, but energy waste occurs during low frame rate periods
Solution Approach 1:
The data driver operates periodically based on the detected frame rate. For low frame rates, it activates only during necessary update periods and remains in low-power state otherwise. This periodic operation pattern eliminates continuous energy waste while maintaining required display update responsiveness.
3Use of energy by moving object
If power-saving modes are implemented to reduce energy consumption, then energy efficiency improves, but system complexity increases due to additional control mechanisms
Solution Approach 1:
The system uses feedback from frame rate detection to automatically control the power-saving modes. The data driver monitors the incoming signal's frame rate and automatically adjusts its operating state without requiring complex manual control mechanisms. This feedback-based approach simplifies the overall control architecture while achieving effective power savings.
Data Source
AI summary
A display apparatus includes a display panel configured to display an image, a data driver including a voltage generator configured to convert an image data applied thereto to a data voltage and a buffer configured to apply the data voltage to the display panel, a timing controller including a mode controller configured to generate a mode selection signal on the basis of an image frame rate of the image data. The data driver is configured to be operated in a power cut-off mode or a stand-by mode in response to the mode selection signal. The driving voltage switch is configured to cut off the analog driving voltage applied to at least one of the buffer and the voltage generator during the power cut-off mode and the bias controller is configured to reduce a bias current in the stand-by mode.