Emission Diode Compliance Voltage Inflection Point Optimization
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Solution Overview
Problem
Portable display devices that use emission diodes, such as LEDs, face inefficiencies in power usage due to generic voltage settings that result in excessive power consumption and heat generation, leading to frequent recharging needs and user discomfort.
Innovation Solution
Monitoring the output brightness of each emission diode over a range of compliance voltages to determine an inflection voltage, where increasing the voltage does not significantly enhance brightness but decreasing it significantly reduces output, allowing for optimized voltage headroom settings to achieve peak efficiency without sacrificing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If generic voltage settings are used for emission diodes, then device simplicity is maintained, but power consumption increases and heat generation occurs
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the compliance voltage based on the inflection point characteristics of each emission diode. Instead of using fixed generic voltage settings, the system monitors output brightness and determines the inflection voltage where increasing voltage no longer yields significant brightness improvement. This adaptive parameter adjustment optimizes power consumption while maintaining device simplicity through automated control.
Solution Approach 2:
The patent implements feedback by continuously monitoring the output brightness of emission diodes and using this information to adjust the compliance voltage. The system measures the relationship between commanded compliance voltage and actual output brightness, identifies the inflection point, and commands an applied compliance voltage within a threshold of this inflection point. This closed-loop feedback mechanism reduces power consumption without requiring complex manual voltage settings.
2Illumination intensity
If higher compliance voltage is applied to ensure peak brightness, then output brightness is guaranteed, but power consumption and heat generation increase
Solution Approach 1:
The patent changes the voltage parameter dynamically by identifying the inflection voltage for each emission diode through brightness monitoring. The inflection voltage represents the point where further voltage increases produce diminishing brightness returns. By commanding the compliance voltage to be within a threshold of this inflection point, the system achieves near-peak brightness output while minimizing unnecessary power consumption and heat generation associated with excessive voltage application.
Solution Approach 2:
The patent applies partial action by determining that full voltage headroom is not necessary for optimal operation. Instead of applying maximum or excessive compliance voltage to ensure peak brightness, the system identifies the inflection point where sufficient brightness is achieved and commands voltage within a threshold of this point. This partial voltage application eliminates excessive power consumption while maintaining adequate output brightness.
3Power
If voltage headroom is increased for each emission diode, then peak output brightness can be achieved, but power efficiency decreases
Solution Approach 1:
The patent optimizes power efficiency by changing the compliance voltage parameter to match the actual characteristics of each emission diode. Through monitoring output brightness over a range of compliance voltages, the system determines the inflection voltage specific to each diode and commands the applied voltage to be within a threshold of this inflection point. This parameter optimization enables peak output brightness to be achieved with minimal voltage headroom, thereby maximizing power efficiency and reducing energy waste.
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
This method realizes significant power savings by ensuring each emission diode operates at peak efficiency with minimal voltage headroom, reducing the need for frequent recharging and minimizing heat generation, thereby enhancing user experience.
Implementation Method 1
Emission diodes such as light-emitting diodes (LEDs) and laser diodes are used in an increasing number of applications
Data Source
AI summary
A method for operating a display comprising a plurality of emission diodes. For each emission diode, an output brightness of the emission diode is monitored over a range of compliance voltages. Based on the monitored output brightness of the emission diode, an inflection voltage is determined. At the inflection voltage, increasing a commanded compliance voltage does not yield an above-threshold increase in output brightness. Further, decreasing the commanded compliance voltage from the inflection voltage yields an above-threshold decrease in output brightness. In response to receiving a request for the emission diode to operate at a peak output brightness, an applied compliance voltage is commanded that is within a threshold voltage of the inflection voltage.