Reflective Microstructure Layout for Uniform Light Emission Panels
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Solution Overview
Problem
Light emitting panels face reduced light exit efficiency due to non-uniform diffusion and light trapping caused by optical phenomena like total reflection, leading to light being emitted from unexpected angles and directions.
Innovation Solution
A light emitting panel with a reflective structure layer comprising first and second microstructure units, where the spacing between adjacent first microstructure units is less than between adjacent second microstructure units, enhancing light guidance and emission uniformity by reflecting and guiding light to expected angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light emitting panel uses conventional light guide structure, then light can be emitted, but light diffusion uniformity is poor and light exit efficiency is reduced due to total reflection
Solution Approach 1:
The light guide structure is segmented into multiple layers with different microstructure units. The first microstructure units are disposed at a first spacing, while the second microstructure units are disposed at a second spacing greater than the first spacing. This segmentation allows different regions to handle different functions: denser spacing for broad light collection and sparser spacing for directional control, thereby improving light exit efficiency and reducing light loss.
Solution Approach 2:
Different regions of the light guide structure are assigned different microstructure densities and configurations. The first microstructure units with smaller spacing are placed in regions requiring broad light diffusion, while the second microstructure units with larger spacing are placed in regions requiring directional light emission. This local differentiation optimizes light guidance and reduces total reflection losses.
2Illumination intensity
If light guide structure uses uniform microstructure spacing, then manufacturing is simple, but light cannot be guided to expected angles and diffusion uniformity is poor
Solution Approach 1:
The uniform spacing is segmented into at least two different spacings: a first spacing for the first microstructure units and a second spacing for the second microstructure units. This segmentation enables the structure to guide light to expected angles while maintaining manufacturing feasibility through standardized unit repetition at different intervals.
Solution Approach 2:
The patent introduces a dimensional variation in spacing configuration without complicating the basic microstructure unit design. By varying the spacing distance rather than the microstructure shape itself, the patent achieves improved diffusion uniformity and light guidance while keeping manufacturing processes relatively simple.
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
Improves light diffusion uniformity and exit efficiency by effectively guiding light from the light emitting elements, reducing light loss and enhancing the overall light emitting effect.
Implementation Method 1
the light emitted from the light emitting element may be guided and emitted out by means of the first microstructure units and the second microstructure units. For example, a larger range of rays of light may be reflected and guided by the first microstructure units
Data Source
AI summary
The present invention provides a light emitting panel, which includes: a substrate, at least one light emitting element disposed on the substrate, and a reflective structure layer. The reflective structure layer includes a plurality of first microstructure units disposed on the substrate and distributed around the at least one light emitting element, and a plurality of second microstructure units disposed on and overlapping the first microstructure units. A spacing between adjacent first microstructure units among the first microstructure units is less than a spacing between adjacent second microstructure units among the second microstructure units.