Partial Light-Adjusting Layer for Uniform LED Light Output
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Solution Overview
Problem
The edge regions of light emitting units in electronic devices are often damaged during manufacturing, leading to non-uniform light emission and reduced light output due to excessive centralized light, especially when the size of the units is reduced.
Innovation Solution
A lighting device design that includes a substrate, a light emitting unit, and a light adjusting layer with a first portion that partially covers the light output surface and a second portion that does not cover it, connected through electrode elements, to scatter and distribute light uniformly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of the light emitting unit is reduced to enhance resolution, then the resolution is improved, but the damaged region ratio increases causing more severe light centralization
Solution Approach 1:
The light adjusting layer is designed with spatially varying properties: the first portion has different optical characteristics than the second portion. Specifically, the first portion covers the light output surface to scatter light, while the second portion extends beyond to capture and redirect light from damaged edge regions, creating local quality variations that address the light centralization problem
Solution Approach 2:
The light adjusting layer extends in two dimensions: the first portion covers the light output surface area, and the second portion extends beyond the light emitting unit boundaries. This dimensional extension allows the structure to intercept light from damaged edge regions and redirect it toward the center, transforming the light distribution pattern
2Ease of manufacture
If etching process is used in manufacturing, then the light emitting unit can be formed, but the edge region is damaged causing excessive centralized light
Solution Approach 1:
Instead of avoiding the damaged edge regions caused by etching, the invention utilizes them by extending the light adjusting layer's second portion beyond the light emitting unit boundaries. This extended portion captures the excessive light from damaged edges and redirects it through optical scattering and reflection, converting the harmful centralized light into beneficial uniform illumination
Solution Approach 2:
The light adjusting layer serves as an intermediary element between the damaged light emitting unit and the final light output. It mediates the light distribution by scattering light from the first portion and redirecting light from the second portion, transforming the non-uniform light pattern into a uniform output without modifying the original light emitting unit
3Illumination intensity
If the light adjusting layer completely covers the light output surface, then light scattering is maximized, but light output is reduced
Solution Approach 1:
The light adjusting layer is segmented into two distinct portions: the first portion covering the light output surface for light scattering, and the second portion extending beyond the light emitting unit for capturing and redirecting light. This segmentation allows each portion to perform its specific function optimally without the drawbacks of complete coverage
Solution Approach 2:
The first portion of the light adjusting layer partially covers the light output surface rather than completely covering it. This partial coverage is sufficient to scatter light and improve uniformity while avoiding excessive light absorption or blocking that would reduce overall light output
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 light adjusting layer effectively scatters light, resulting in more uniform emission and increased light output by reducing the centralization of light, enhancing the display quality of electronic devices.
Implementation Method 1
The light adjusting layer effectively scatters light, resulting in more uniform emission and increased light output by reducing the centralization of light
Data Source
AI summary
The present disclosure provides a lighting device and a manufacturing method thereof. The lighting device includes a substrate, a light emitting unit, a light adjusting layer and at least one electrode connecting element. The light emitting unit is disposed on the substrate and includes a light output surface and a plurality of top electrodes. The light adjusting layer is disposed on the light emitting unit, and the light adjusting layer includes a first portion and a second portion connected to the first portion. Wherein the top electrodes are electrically connected to each other through the electrode connecting element, the first portion only partially covers the light output surface, and the second portion does not cover the light output surface.