Time-Division Display Module Switching to Reduce PCB Vibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with large-scale, high-resolution display modules experience vibrations and noise due to sudden changes in voltage during the process of removing remaining potentials in non-operating modules, affecting driving efficiency.
Innovation Solution
A display device with a power supply and processors that consecutively supply power to display modules by selectively turning on switches, using a first and second switch configuration, and applying a preset voltage during specific time periods to minimize voltage changes and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If discharge circuits are used to remove remaining potentials in non-operating display modules, then the display modules can be consecutively operated, but sudden changes in voltage occur causing shaking of the PCB, vibrations, and noises
Solution Approach 1:
The patent applies preliminary action by gradually reducing the voltage in non-operating display modules before completely turning them off. The voltage is reduced through multiple stages (first to second voltage level, then to third voltage level) before the module is fully deactivated. This gradual voltage reduction prevents sudden voltage changes that would otherwise cause PCB shaking, vibrations, and noises, while still allowing consecutive operation of multiple display modules.
2Loss of time
If voltage is suddenly changed to remove remaining potentials, then the switching process is fast and efficient, but vibrations and noises occur due to PCB shaking
Solution Approach 1:
The patent applies periodic action by using a multi-stage voltage reduction process with distinct time periods. The voltage is reduced in stages over different time intervals rather than instantaneously. This periodic, staged approach maintains relatively fast switching while eliminating the harmful vibrations and noises caused by sudden voltage changes.
3Reliability
If discharge circuits are used to control remaining potentials, then consecutive operation of display modules is achieved, but the process generates harmful vibrations and noises
Solution Approach 1:
The patent applies parameter changes by modifying the voltage parameter in a controlled, staged manner. Instead of using discharge circuits that cause sudden voltage collapse, the voltage is gradually changed from the first voltage level to the second voltage level, then to the third voltage level, and finally to the fourth voltage level. This controlled parameter change maintains reliable consecutive operation of display modules while eliminating the harmful vibrations and noises.
Data Source
AI summary
A display device may include: a power supply; a first display module comprising a first switch connected to the power supply and a second switch connected to a preset voltage; a second display module comprising a third switch connected to the power supply and a fourth switch connected to the preset voltage; one or more processors configured to consecutively supply power to the first display module and the second display module by selectively turning on the first switch, the second switch, the third switch, and the fourth switch; and memory storing instructions that when executed by the one or more processors, cause the one or more processors to: turn on the first switch and the fourth switch during a first time period within a preset time; and turn on the third switch and the second switch during a second time period within the preset time.