Mode-Based Power Management for Display Signal Stability
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Solution Overview
Problem
Display devices face challenges in minimizing power consumption, quickly changing modes, and stabilizing signal transmission/reception to minimize malfunctions in power management devices.
Innovation Solution
A power management device with input terminals for mode indication signals, output terminals connected to various components, power converting circuits, memory for control values, and a control circuit to adjust operation states based on mode signals, optimizing power supply and reducing power consumption by controlling power converting circuits according to different modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power management device operates all components in all modes, then the reliability is maintained, but the power consumption increases
Solution Approach 1:
The power management device dynamically adjusts the operation states of power converting circuits based on mode indication signals. Different circuits are selectively activated or deactivated depending on the operational mode (e.g., display mode, touch mode, blanking mode), enabling adaptive power management that reduces consumption while maintaining reliability for active components
Solution Approach 2:
The device changes operational parameters by switching between different operation states (on/off, active/standby) of power converting circuits based on the current mode. The control circuit receives mode indication signals and adjusts the power supply parameters accordingly, optimizing the balance between power consumption and reliability
2Productivity
If the power management device changes modes quickly, then the productivity is improved, but the signal transmission stability deteriorates
Solution Approach 1:
The timing controller proactively generates mode indication signals at predetermined timings before mode transitions occur. This preliminary signaling allows the power management device to prepare for mode changes in advance, enabling fast switching while maintaining stable signal transmission by avoiding abrupt transitions
Solution Approach 2:
The system implements synchronized signal transmission where the timing controller provides mode indication signals that coordinate with the operation states of various circuits. This feedback mechanism ensures that all components transition together, maintaining signal stability during rapid mode changes
3Device complexity
If the power management device uses simplified mode control, then the device complexity is reduced, but the adaptability to different modes deteriorates
Solution Approach 1:
The power management device divides the control function into separate power converting circuits, each dedicated to specific components. Each circuit can be independently controlled based on mode requirements, reducing overall control complexity while maintaining high adaptability through modular circuit architecture
Solution Approach 2:
The control circuit is designed with universal functionality to handle multiple operational modes through a standardized interface. By receiving mode indication signals and applying predetermined control logic, the same control circuit adapts to different modes (display, touch, blanking) without requiring mode-specific hardware, achieving both simplicity and versatility
Data Source
AI summary
The present disclosure relates to a technology for supplying power to a display device and provides a device which checks a control value for each mode stored in a memory according to a mode indication signal in a simple form received from an external device and controls operation states of power converting circuits in each mode according to the control value for each mode.