AC LED Driver with Segmented Control for Uniform Luminosity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing AC light emitting devices face issues with inconsistent luminosity and potential LED damage due to group loop control methods, leading to varied light intensities and risk of LED damage from overcurrent when partially turned on.
Innovation Solution
An AC light emitting device comprising a buck module, switching unit, control module, and dimmer module, where the control module outputs a pulse waveform signal to the switching unit based on input voltage and dimming signals, allowing for adjustable luminosity and preventing overcurrent by controlled on/off states of the AC lighting emitting module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If group loop control method is used to switch luminosity, then luminosity adjustment is achieved, but inconsistent luminosity and LED overcurrent damage occur
Solution Approach 1:
The patent divides the light emitting module into individually controllable LED units or smaller groups, each with independent current control circuits. This segmentation allows precise current regulation for each LED, preventing overcurrent damage while maintaining consistent luminosity across all LEDs, even when operating at different brightness levels.
Solution Approach 2:
The patent implements individual current control for each LED or LED group, dynamically adjusting current parameters based on operating conditions. By monitoring and regulating current to each LED independently, the system prevents overcurrent damage while achieving smooth luminosity adjustment without the inconsistencies caused by group loop control.
2Illumination intensity
If light emitting module is partially turned on, then luminosity is reduced, but some LEDs are frequently used resulting in shorter lifetime or damage
Solution Approach 1:
The patent segments the light emitting module into individually addressable LED units with separate control circuits. When partial luminosity is required, the system can distribute operation across different LED segments rather than frequently cycling the same LEDs, thereby extending overall LED lifetime while maintaining the desired brightness level.
Solution Approach 2:
The patent implements periodic rotation of active LED groups when operating at reduced luminosity. Instead of keeping the same LEDs active continuously, the system periodically switches between different LED segments, distributing wear evenly across all LEDs and significantly extending their operational lifespan.
3Ease of operation
If switch is used for group loop control, then luminosity switching is achieved, but inconsistent light intensity in different areas occurs
Solution Approach 1:
The patent divides the lighting system into multiple independently controllable LED segments with individual current regulation. This segmentation enables uniform current distribution across all active LEDs, ensuring consistent light intensity throughout the entire emitting area while maintaining simple switch-based luminosity control through intelligent segment management.
Solution Approach 2:
The patent dynamically adjusts current parameters for each LED segment based on real-time monitoring, ensuring uniform current distribution across all active LEDs. This parameter regulation maintains consistent light intensity throughout the emitting area while preserving the ease of operation provided by switch-based luminosity control.
Data Source
AI summary
Disclosed is an AC light emitting device. The AC light emitting device is electrically connected to an AC power, and the AC power is rectified by a rectification module and inputs an input voltage. The AC light emitting device comprises a buck module, a switching unit, a control module and an AC lighting emitting module. The buck module is electrically connected to the rectification module. The switching unit is electrically connected to the rectification module and the buck module. The control module is electrically connected to the switching unit and the buck module. The AC lighting emitting module is electrically connected to the switching unit. The control module outputs a pulse waveform signal to the switching unit according to the input voltage and a dimming signal, and the switching unit turns on or off the AC lighting emitting module according to the pulse waveform signal.