Light-Emitting Module Reflector Layout for Uniform Irradiation
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Solution Overview
Problem
Light-emitting devices with matrix configurations of light-emitting elements often experience uneven irradiation due to dark portions between adjacent elements, which affects the uniformity and quality of the emitted light.
Innovation Solution
A light-emitting device design that includes a first light source part with at least one first light-emitting element, a second light source part surrounding the first part, and a light-reflective member between second light-emitting elements, with overlapping second light-transmitting layers to reduce luminance differences and enhance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If light-emitting elements are arranged in a matrix configuration, then the light-emitting device can provide structured and controllable light emission, but dark portions appear between adjacent light-emitting elements causing uneven irradiation
Solution Approach 1:
A light-reflective member is introduced as an intermediary component positioned between adjacent light-emitting elements. This reflector redirects light that would otherwise create dark portions, filling the gaps and improving overall irradiation uniformity while preserving the matrix configuration's structured emission pattern
Solution Approach 2:
The light-reflective member is strategically positioned only in specific regions between light-emitting elements where dark portions occur. This localized approach addresses the uneven irradiation problem in critical areas without altering the overall matrix structure or requiring modification of all light-emitting elements
2Illumination intensity
If light-reflective members are added between light-emitting elements, then uneven irradiation is reduced, but device complexity increases
Solution Approach 1:
The light-reflective member is implemented as a thin film or sheet structure rather than a bulky three-dimensional component. This reduces the overall device complexity and allows for easier integration into the existing matrix configuration while still achieving the light-redirecting function to improve irradiation uniformity
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 design effectively reduces uneven irradiation by minimizing luminance differences between light-emitting and non-light-emitting regions, resulting in improved light uniformity and contrast.
Implementation Method 1
a light-reflective member located between the plurality of second light-emitting elements
Implementation Method 2
one second light-transmitting layer among the at least one second light-transmitting layer overlaps adjacent second light-emitting elements among the plurality of second light-emitting elements and the light-reflective member disposed between the adjacent second light-emitting elements in a top view
Data Source
AI summary
A light-emitting device includes: a light source including: a first light source part including one or more first light-emitting elements, and a second light source part located outward of the first light source part so as to surround the first light source part in a top view, the second light source part including a plurality of second light-emitting elements; one or more first light-transmitting layers located above the first light source part; one or more second light-transmitting layers located above the second light source part; and a light-reflective member located between the plurality of second light-emitting elements. A first of the one or more second light-transmitting layers overlaps adjacent second light-emitting elements among the plurality of second light-emitting elements and the light-reflective member disposed between the adjacent second light-emitting elements in a top view.