LED Illuminator Control for Adjustable Strobe Intensity and Pulse Width
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Solution Overview
Problem
Existing LED illuminators lack the ability to efficiently switch between constant light and strobe modes while allowing adjustable light intensity and extended pulse width and duty cycle without causing LED damage.
Innovation Solution
An LED illuminator with a microcontroller and synchronous buck drivers that receive dimming and strobe command signals, enabling independent control of LED brightness and strobing, including overdrive mode for adjustable intensity and pulse control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LED illuminators use fixed parameter strobe mode with preprogrammed pulse duration and repetition rate, then the device complexity is reduced, but the adaptability and versatility are limited
Solution Approach 1:
The patent implements dynamic control of LED strobe parameters through a microcontroller that can adjust pulse duration, repetition rate, and intensity in real-time based on application requirements. This transforms the fixed-parameter system into a dynamic, adaptable system while maintaining manageable complexity through integrated control architecture.
Solution Approach 2:
The system enables continuous adjustment of critical strobe parameters including pulse duration, repetition rate, and LED intensity through programmable control. This allows the same hardware to adapt to different application needs without requiring physical reconfiguration or multiple dedicated devices.
2Illumination intensity
If LED illuminators extend pulse width and duty cycle for brighter strobe output, then the illumination intensity is improved, but the risk of LED damage increases
Solution Approach 1:
The control system monitors LED operating conditions and adjusts drive parameters accordingly, preventing excessive current and heat buildup that could damage LEDs. This feedback mechanism allows the system to maintain high illumination intensity during strobe operation while automatically protecting against conditions that would reduce LED reliability.
Solution Approach 2:
The system uses periodic strobe operation with controlled duty cycles, allowing LEDs to rest between pulses and dissipate heat. This periodic action enables high peak intensities during strobe events while maintaining average power levels that protect LED longevity.
3Reliability
If separate LED illuminators are used for constant illumination and strobe illumination, then the reliability of each mode is optimized, but the device complexity and space requirements increase
Solution Approach 1:
The patent designs a single LED illuminator that can operate in multiple modes including constant DC illumination and programmable strobe modes. The integrated control system allows one device to replace what would traditionally require separate dedicated illuminators, reducing system complexity and space requirements while maintaining optimized performance in each mode.
Solution Approach 2:
The illuminator dynamically switches between different operational modes (DC constant mode and strobe mode) based on control signals, with the ability to adjust parameters for each mode. This dynamic multi-functionality eliminates the need for separate fixed-function devices while preserving the reliability benefits of mode-optimized design.
4Illumination intensity
If LED illuminators provide maximum light intensity during strobe mode, then the illumination intensity is improved, but the energy consumption increases
Solution Approach 1:
The system delivers maximum light intensity during brief strobe pulses while maintaining low average power consumption through controlled duty cycles. The periodic on-off operation allows peak performance when needed while minimizing energy usage during the majority of the time when full illumination is not required.
Solution Approach 2:
The control system adjusts LED drive current and pulse parameters to optimize the balance between light output and energy consumption. By programmably controlling pulse duration, repetition rate, and intensity, the system can adapt power usage to match actual illumination requirements rather than operating at maximum capacity continuously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables flexible operation between constant and strobe modes with adjustable light intensity, preventing LED damage by optimizing pulse width and duty cycle.
Implementation Method 1
An LED illuminator has an LED array that contains LEDs of one or more colors. An LED driver is provided for each LED color type.
Implementation Method 2
The microcontroller selectively generates the strobe command signal and each dimming command signal.
Data Source
AI summary
An LED illuminator and its associated method of operation. The LED illuminator has an LED array that contains LEDS of one or more colors. An LED driver is provided for each LED color type. Each LED driver has a dimming input for receiving a dimming command signal and a strobe input for receiving a strobe command signal. Each LED driver selectively dims the LEDs it controls when the dimming command signal is received and strobes the LEDs it controls when the strobe command signal is received. A microcontroller is provided that has a separate dimming signal output for each of the LED drivers. The microcontroller is coupled to each dimming input within the LED drivers. The microcontroller has a single strobe signal output coupled to all of the strobe inputs of all the LED drivers. The microcontroller selectively generates the strobe command signal and each dimming command signal.