Modular Display Power Cutoff Synchronization for Uniform Brightness
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Solution Overview
Problem
In modular display apparatuses, variations in the timing of DC power cutoff across different display modules result in uneven brightness due to differences in DC power supply deviations, leading to non-uniform screen brightness.
Innovation Solution
A controller and processor system that detects when DC power output falls below a threshold, transmitting a detection signal to synchronize the shutdown of DC power supply across all modules, ensuring uniform power cutoff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each display module operates independently with its own power supply timing, then device complexity is reduced and ease of operation is improved, but screen brightness uniformity deteriorates due to different power cutoff times
Solution Approach 1:
The patent merges the power supply control of multiple display modules by introducing a master controller that coordinates the shutdown timing of all modules. The master controller receives shutdown signals and generates synchronized shutdown commands for all slave controllers, ensuring all display modules turn off their power supplies at the same time. This combining approach maintains independent power supply architecture while achieving unified power management to eliminate brightness uniformity issues.
Solution Approach 2:
The patent implements a feedback mechanism where the master controller monitors the operational status of all display modules and adjusts shutdown timing based on received feedback signals. When the master controller receives a shutdown signal, it waits for confirmation from slave controllers that modules are ready for shutdown, then coordinates the actual power cutoff. This feedback loop ensures synchronized shutdown while maintaining operational independence of individual modules.
2Ease of manufacture
If DC power supply cutoff timing is not synchronized across display modules, then ease of manufacture is improved by allowing independent power management, but manufacturing precision of screen brightness uniformity deteriorates
Solution Approach 1:
The patent applies preliminary action by having the master controller prepare shutdown commands in advance and distribute them to all slave controllers before actual power cutoff occurs. The master controller receives the shutdown signal, processes it, and sends coordinated shutdown commands to all display modules simultaneously. This preliminary coordination ensures that all modules power down at the same time, maintaining brightness uniformity while preserving independent power management architecture.
3Illumination intensity
If a centralized control system is implemented to synchronize power shutdown, then screen brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The patent segments the control system into a master controller and multiple slave controllers, where the master controller handles high-level coordination and slave controllers handle individual module control. This segmentation allows the centralized synchronization function to be distributed across multiple components, reducing the complexity burden on any single component while achieving overall system-wide power synchronization to maintain brightness uniformity.
Data Source
AI summary
A display apparatus is disclosed. The display apparatus is included in a modular display apparatus and comprises at least one display module, a power supply that supplies a direct current power to the at least one display module, and at least one processor configured to, based on a direct current power output by the power supply being smaller than a threshold value, transmit a detection signal to a controller of the modular display apparatus, and based on receiving a control signal from the controller, turn off the supply of the direct current power output by the power supply to the at least one display module based on the control signal.