Reflective LED Package Structure for Light Leakage Control
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Solution Overview
Problem
Conventional light emitting devices suffer from light blurring due to light leakage through the barrier member, especially at corner portions with less reflective material, leading to reduced luminous area and interference with other drivers' visual fields in vehicle lamps.
Innovation Solution
Incorporating a reflective member that covers the side surfaces of the wavelength conversion member and light emitting chip, and a barrier member with an outer wall design that prevents light from passing through, ensuring complete reflection and minimizing light blurring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a barrier member containing reflective material is used to reflect light, then light reflection is improved, but light leakage occurs at corner portions with less reflective material distribution
Solution Approach 1:
The patent applies local quality by making the barrier member thickness non-uniform, specifically increasing thickness at corner portions where light leakage occurs. This localized thickening ensures sufficient reflective material distribution at critical areas while maintaining overall barrier functionality.
Solution Approach 2:
The patent employs a nested structure by placing a light-shielding member inside the barrier member. The light-shielding member is positioned within the barrier member's hollow interior, creating a nested configuration that enhances light blocking capability from the inside outward.
2Object-generated harmful factors
If the barrier member thickness is increased to prevent light leakage, then light blocking is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent segments the light blocking function into two separate components: the barrier member and the light-shielding member. This segmentation allows each component to have optimized thickness and material properties, with the light-shielding member handling the heavy blocking duty inside while the barrier member provides external containment and additional blocking at its thickest sections.
Solution Approach 2:
The nested configuration of placing the light-shielding member within the barrier member allows efficient use of space while achieving enhanced light blocking. The internal placement maximizes the blocking effect without proportionally increasing external dimensions or manufacturing complexity.
3Object-generated harmful factors
If a light-shielding member is added inside the barrier member, then light leakage prevention is improved, but device complexity increases
Solution Approach 1:
The light-shielding member is nested within the hollow interior of the barrier member, creating a compact integrated structure. This nested design prevents light leakage from the inside while utilizing the existing barrier member geometry, thereby limiting the increase in overall device complexity.
Solution Approach 2:
The patent merges the light-shielding member with the barrier member assembly, where the light-shielding member serves as an internal component of the overall barrier structure. This integration allows the two components to work together as a unified light blocking system, reducing the need for separate mounting and alignment mechanisms.
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 prevents light blurring and loss, maintaining a clear luminous area while ensuring drivers' visual fields are not obstructed, even in vehicle lamps, by reflecting light emitted from the light emitting device.
Implementation Method 1
a first reflective member covering a side surface of the first wavelength conversion member
Implementation Method 2
a first wavelength conversion member covering an upper surface of the first light emitting chip
Data Source
AI summary
The present disclosure relates to a light-emitting device. The light-emitting device includes a substrate, a first light-emitting chip, a first wavelength conversion member, and a barrier member. The first light-emitting chip is mounted on the substrate. The first wavelength conversion member covers the upper surface of the first light-emitting chip. A first reflective member covers the side surface of the first wavelength conversion member. Further, the barrier member includes an outer wall surrounding the side surfaces of the first light-emitting chip and the first reflective member.