Mixed Light Optoelectronic Device Using Temperature-Dependent Resistance
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Solution Overview
Problem
Existing optoelectronic devices that generate mixed light, such as white light using LEDs, face challenges in stabilizing the color locus with respect to temperature due to different temperature dependencies of chip technologies, requiring complex and costly control circuits with sensors and control loops that are inefficient under dimmed conditions.
Innovation Solution
An optoelectronic device comprising a first and second semiconductor light source with different wavelength ranges, connected in series and parallel circuits respectively, and a temperature-dependent resistance element that influences the intensity and wavelength of each source to minimize temperature-dependent color locus shifts, eliminating the need for complex control loops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If complex control circuits with sensors and control loops are used to stabilize color locus, then color stability is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the complex control circuits, sensors, and control loops from the system. Instead of using active control mechanisms, the invention relies on passive optical mixing of light from multiple LEDs with different temperature dependencies, allowing color stability to be achieved without these extracted components.
Solution Approach 2:
The system achieves color locus stabilization through self-service mechanisms where LEDs with opposite temperature dependencies naturally compensate for each other's color shifts. The mixed light from multiple LEDs automatically maintains stable color characteristics without external control intervention, as the inherent physical properties of the LED materials provide self-regulation.
2Stability of the object's composition
If control loops are used to maintain color stability, then color locus stability is improved, but efficiency deteriorates under dimmed conditions
Solution Approach 1:
The color stability mechanism operates passively through the inherent optical properties of the LED materials and their mixed light output. No active control loops are engaged regardless of operating conditions, maintaining high efficiency across all dimming levels while preserving color stability through the natural compensation effect of combining light from LEDs with different temperature characteristics.
3Stability of the object's composition
If multiple LEDs with different temperature dependencies are combined, then color locus stability is improved, but the number of components increases
Solution Approach 1:
The patent combines multiple LEDs with different wavelength ranges and temperature dependencies into a single integrated light source assembly. By merging these components and mixing their light outputs optically, the system achieves color locus stability that would require far fewer components if controlled by traditional active methods, as the combining effect itself provides the stabilization mechanism.
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
The device achieves stable color locus with reduced temperature dependence and improved efficiency by directly influencing the voltage and current of the semiconductor light sources through the resistance element, minimizing power loss and self-heating effects.
Implementation Method 1
a resistance element having a temperature-dependent electrical resistance, wherein the first wavelength and/or the first intensity of the light emitted by the first semiconductor light source have/has a first temperature dependence, and the second wavelength range and/or the second intensity of the light emitted by the second semiconductor light source have/has a second temperature dependence
Data Source
AI summary
An optoelectronic device includes a first semiconductor light source having a first light-emitting diode; a second semiconductor light source having a second light-emitting diode; and a resistance element having a temperature-dependent electrical resistance, wherein a first wavelength and/or a first intensity of light emitted by the first semiconductor light source have/has a first temperature dependence, and the second wavelength range and/or the second intensity of the fight emitted by the second semiconductor light source have/has a second temperature dependence different from the first temperature dependence, the resistance element and the first semiconductor light source form a series circuit, and the series circuit and the second semiconductor light source form a parallel circuit.