Multi-Oriented OLED Area Illumination System
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Solution Overview
Problem
Existing area illumination systems using solid-state LEDs or OLEDs face efficiency losses due to optical processing steps and aesthetic limitations, particularly in providing broadband illumination over vast areas without glare or color inconsistency.
Innovation Solution
A solid-state area illumination system comprising multiple OLED devices on separate substrates, each emitting light at various angles with different frequency ranges, positioned at multiple orientations to ensure any point receives a broadband combination of light from multiple devices, utilizing microcavity structures and reflective electrodes to vary light frequency with emission angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If optical filtering or reflecting layers are added to OLED devices to control light emission, then the consistency of light color and angle of emission is improved, but the overall efficiency of the illumination system decreases due to optical losses
Solution Approach 1:
The patent changes the fundamental parameter of light generation by using multiple OLED devices with different emission spectra (red, green, blue) instead of modifying a single OLED with filtering layers. This approach achieves color consistency through spectral combination rather than optical filtering, avoiding the energy losses associated with absorbing filters and reflecting layers.
2Reliability
If multiple small LED devices are combined to provide area illumination, then the robustness and long-life of solid-state lighting is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges multiple functional OLED devices into a single integrated illumination system. By combining red, green, and blue OLED devices in one unit with a common diffuser and housing, it achieves area illumination with simplified structure compared to assembling multiple separate LED devices, reducing manufacturing complexity while maintaining solid-state reliability.
3Reliability
If point light sources such as LEDs are used, then the robustness of solid-state lighting is improved, but additional light diffusers and lampshades are required to avoid glare, increasing device complexity
Solution Approach 1:
The patent transitions from point light sources to an area light source by arranging multiple OLED devices in a planar configuration. This dimensional change from 0D (point) to 2D (area) inherently distributes light across a larger surface, eliminating glare without requiring additional external diffusers or lampshades, thus simplifying the overall device structure.
4Ease of manufacture
If filters are used over white-light lamps to provide colored illumination, then the aesthetic appeal for decoration is improved, but the efficiency of the illumination system decreases due to light absorption
Solution Approach 1:
The patent segments the white-light generation function into three separate OLED devices, each emitting a primary color (red, green, blue). Instead of using a white-light source with filters, each OLED device directly emits its designated color without filtration, eliminating energy losses from filter absorption while maintaining the ability to create aesthetically pleasing colored illumination.
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 system provides aesthetically pleasing, efficient broadband illumination by combining different colors of light from multiple OLED devices, reducing glare and maintaining consistent color across an area without significant efficiency loss, suitable for applications like roadways or stadiums.
Implementation Method 1
Organic light emitting diodes (OLEDs) are manufactured by depositing organic semiconductor materials between electrodes on a substrate
Implementation Method 2
utilizing microcavity structures and reflective electrodes to vary light frequency with emission angle
Data Source
AI summary
Solid-state area illumination stems and method for forming such systems are provided. The illumination system comprises: a plurality of OLED devices each device formed on a separate substrate and each device emitting light at a plurality of angles relative to the substrate, the emitted light having different ranges of frequencies at different ranges of the plurality of angles; and a support positioning each of the plurality of OLED devices at a plurality of orientations relative to an area of illumination, the positioning being defined so that any point on any surface within the area of illumination will receive a broadband combination of light from more than one of the OLED devices.