LED Illumination System Using Time Division Multiplexing for Color Stabilization

The patent applies periodic action by cycling through different LED color channels in sequential time intervals rather than simultaneously. Each channel is activated for a specific duration in a repeating sequence, creating a time-division multiplexed output that appears as blended color to the human eye. This periodic channel switching eliminates the need for rapid power cycling within each channel while maintaining color adjustment capability.

The patent uses preliminary action by pre-calculating and storing the optimal time interval allocations for each LED channel based on the desired output color. The controller retrieves these pre-determined time intervals from memory and executes them without real-time calculation, reducing processing complexity and allowing the power supply to operate at a constant level throughout the entire cycle.

The patent reduces power supply size by implementing periodic action where the full power output is required only during brief intervals when individual LED channels are activated, rather than requiring the power supply to continuously deliver full power. The power supply operates at a lower average power level, matched to the actual energy requirements of the time-division multiplexed LED channels.

The patent applies partial action by activating only the necessary subset of LED channels during each time interval based on the desired color output. Rather than all channels operating simultaneously at full power, only the channels contributing to the target color are activated for their allocated time portions, reducing the peak power requirement and allowing for a more compact power supply design.

The patent implements universality by using a single broadband light sensor that can detect all visible wavelengths, replacing the need for multiple specialized sensors. The sensor measures the combined output of all LED channels during their respective activation intervals, and the controller processes this single measurement stream to adjust all channel time intervals, achieving color control with reduced component complexity.

The patent merges the function of multiple channel-specific sensors into a single broadband sensor. By combining the detection capability for all color channels into one sensor and processing its output through a unified control algorithm, the system achieves the same feedback control function with fewer components, reducing both device complexity and cost while maintaining color control precision.

The patent uses periodic action to cycle through different LED channel combinations in a systematic sequence, ensuring that each LED contributes to the overall output during its allocated time intervals. This periodic activation pattern maintains color space coverage while improving LED utilization by keeping all LEDs actively contributing to light output across the measurement and adjustment cycle, rather than leaving many LEDs inactive.

The patent applies dynamics by continuously adjusting the time interval allocations for each LED channel based on real-time feedback from the light sensor and control algorithm. This dynamic optimization ensures that the minimum necessary number of LEDs are activated at any given time while still achieving the desired color point and maintaining efficient utilization of the LED array across the full color space range.