Electroluminescent Area Illumination Device with Multiple Emitter Profiles
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Solution Overview
Problem
Existing electro-luminescent lighting devices struggle to provide both large area illumination and directed task lighting simultaneously, leading to inefficient energy use due to the need for multiple lighting sources and complex drive circuitry, which increases costs.
Innovation Solution
An electro-luminescent area illumination device with multiple area emitters on a single substrate, each emitting light with different profiles, allowing for both wide-angle and narrow-angle illumination, controlled by a single device to optimize lighting distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lighting sources are used to provide both large area illumination and directed task lighting, then both illumination needs are met, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple lighting functions (large area illumination and directed task lighting) into a single electro-luminescent device by integrating multiple independently controllable light-emitting regions on one substrate, thereby reducing device complexity and cost while maintaining versatility
Solution Approach 2:
The electro-luminescent device is divided into multiple independently addressable light-emitting regions or pixels on a single substrate, allowing different regions to be controlled separately to provide both diffuse area illumination and directed task lighting simultaneously
2Illumination intensity
If luminance of large area illumination source is increased to provide task lighting, then task illumination is improved, but energy waste increases
Solution Approach 1:
The patent applies local quality by enabling different regions of the electro-luminescent device to emit light at different intensities - some regions provide high luminance for task lighting while others provide lower luminance for ambient illumination, thereby meeting illumination needs efficiently without wasting energy
3Ease of operation
If array of micro-lenses is used to direct light output, then directed illumination is achieved, but device complexity and cost increase
Solution Approach 1:
The patent merges the light directing function into the electro-luminescent device structure itself by integrating optical elements or controlling light emission patterns directly from the luminescent regions, eliminating the need for separate complex micro-lens arrays and their associated drive circuitry
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 efficient, cost-effective provision of both general illumination and task lighting from a single device, reducing energy waste and eliminating the need for complex drive circuitry, making it suitable for the general-purpose lighting market.
Implementation Method 1
electro-luminescent area illumination device includes a substrate, and two or more area emitters formed on the substrate. Each of the two or more area emitters emit light having different area illumination profiles
Data Source
AI summary
An electro-luminescent area illumination device that includes two or more area emitters formed on a substrate. Each of the two or more area emitters emit light having different area illumination profiles.