Light Emitting Device with Reflective Material Reducing Absorption
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Solution Overview
Problem
Existing light emitting devices face inefficiencies due to light absorption by protection elements, which reduces the overall light-emitting efficiency and limits design flexibility.
Innovation Solution
A light emitting device design that incorporates a package with a recessed structure, a protection element, a light reflective material, and a light emitting element, where the light reflective material covers the protection element and corners of the package, reducing light absorption and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protection element is provided on the bottom surface to protect the light emitting element, then reliability is improved, but light absorption increases and light-emitting efficiency deteriorates
Solution Approach 1:
A light reflective material is introduced as an intermediary between the protection element and the light emitting element. This reflective material redirects light that would otherwise be absorbed by the protection element back toward the light emitting element, thereby maintaining the protective function while reducing light absorption losses and improving overall light-emitting efficiency.
2Ease of manufacture
If the package structure is simplified to reduce manufacturing complexity, then ease of manufacture is improved, but design flexibility deteriorates
Solution Approach 1:
The package structure is segmented into distinct functional regions: a bottom surface for mounting electrodes and protection elements, side surfaces for light emission, and a recessed portion for positioning the light emitting element. This segmentation allows each region to be optimized independently, simplifying manufacturing processes while maintaining design flexibility for different applications.
Solution Approach 2:
Different portions of the package are assigned different functions and properties: the bottom surface is designed for electrical connection and protection, the side surfaces for light extraction, and the recess for precise positioning. This local differentiation enables simplified manufacturing of each portion while achieving overall design flexibility through their combination.
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 solution effectively reduces light absorption by the protection element, improving light-emitting efficiency and expanding design possibilities for the light emitting device.
Implementation Method 1
the light reflective material covers the bottom surface except for an uncovered region on the bottom surface to cover the protection element and the corners of the bottom surface
Data Source
AI summary
A light emitting device includes a package having a recess which includes a bottom surface having corners. The package includes a first electrode, a second electrode, and a resin portion. The first electrode is provided at a first part of the bottom surface. The second electrode is provided at a second part of the bottom surface. The resin portion is provided between the first electrode and the second electrode at a third part of the bottom surface. A protection element is provided on the bottom surface. A light reflective material covers the bottom surface except for an uncovered region to cover the protection element and the corners of the bottom surface and uncovers an uncovering region of the bottom surface. The uncovered region is defined by linear lines and curved lines connecting the linear lines. A light emitting element is provided in the uncovered region on the bottom surface.