Optoelectronic Housing Shielding Layer for Radiation Control
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Solution Overview
Problem
Conventional optoelectronic components used in headlight and projection applications suffer from irregular emission characteristics, leading to disruptive effects due to electromagnetic radiation being emitted in undesired solid angles, which are not suited for achieving a well-defined luminance gradient and sharp light/dark transitions.
Innovation Solution
A housing with an outer surface partially or completely coated with a shielding layer that reflects or absorbs electromagnetic radiation, preventing its emission into undesired angles, thereby improving the radiation characteristics and ensuring that radiation is directed into a preferred solid angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional housing with thin walls is used, then the housing is simple to manufacture and cost-effective, but electromagnetic radiation penetrates the housing walls and is emitted in undesired solid angles
Solution Approach 1:
The patent applies a shielding layer selectively to specific outer surfaces of the housing that are positioned to block radiation in undesired solid angles. This localized approach provides radiation control only where needed, rather than requiring complete housing opacity, thus maintaining manufacturing simplicity while eliminating harmful radiation emission in specific directions.
Solution Approach 2:
The shielding layer acts as an intermediary element between the radiation source inside the housing and the external environment. This intermediate layer selectively blocks electromagnetic radiation from penetrating the housing walls in undesired directions, preventing harmful radiation emission without requiring fundamental changes to the housing structure.
2Object-generated harmful factors
If the housing is made opaque to block all radiation, then radiation emission in undesired angles is prevented, but the housing complexity and manufacturing cost increase
Solution Approach 1:
Instead of making the entire housing opaque, the patent applies shielding properties only to specific outer surfaces where radiation blocking is required. This localized shielding approach prevents radiation emission in undesired angles while keeping the rest of the housing structure simple and easy to manufacture.
Solution Approach 2:
The housing combines standard housing materials with a specialized shielding layer applied to specific surfaces. This composite structure integrates the functional requirement of radiation blocking only where necessary, maintaining overall housing simplicity while preventing harmful radiation emission in specific directions.
3Productivity
If no shielding layer is applied, then the housing manufacturing is simple and fast, but irregularities in emission characteristics are amplified and have disruptive effects
Solution Approach 1:
The shielding layer is applied selectively to outer surfaces that control radiation emission in undesired solid angles. This localized application corrects specific emission irregularities without requiring complete re-engineering of the housing, thus maintaining fast production cycles while improving emission characteristic consistency in critical areas.
Solution Approach 2:
The shielding layer serves as an intermediary that standardizes the emission characteristics by blocking irregular radiation patterns at the housing surface. This intermediate element corrects emission inconsistencies without requiring changes to the internal LED chip arrangement or complete housing redesign, preserving manufacturing efficiency.
4Object-generated harmful factors
If a shielding layer is applied to the outer surface, then radiation emission in undesired solid angles is significantly reduced or avoided, but the manufacturing process becomes more complex
Solution Approach 1:
The shielding layer is applied only to specific outer surfaces of the housing where radiation blocking is required, rather than covering the entire housing. This selective application reduces radiation emission in undesired angles while minimizing the additional manufacturing complexity by limiting the shielding treatment to critical areas only.
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 shielding layer significantly reduces or eliminates radiation emission in non-preferred angles, enhancing the emission characteristics of optoelectronic components, particularly in headlight applications by ensuring radiation is focused into a desired solid angle with high density and defined luminance distribution.
Implementation Method 1
A housing (2) with an outer surface (24) which is arranged on a radiation side of the housing and is at least partially provided with a shielding layer (3). The shielding layer (3) is suitable for shielding electromagnetic radiation
Implementation Method 2
The shielding layer (3) is suitable for shielding electromagnetic radiation, it being provided in particular for electromagnetic radiation that is generated or is to be generated inside the housing to be shielded from the outside
Data Source
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AI summary
A housing for an optoelectronic component that emits electromagnetic radiation is described. The housing (2) has a housing body (25) with a recess (50) in which at least one chip mounting surface is arranged. At least one outer surface (24) of the housing body, which is located on a radiation side of the housing and adjoins the recess, is provided with a shielding layer (3) suitable for shielding electromagnetic radiation. An electromagnetic radiation-emitting component with such a housing and a method for manufacturing such a housing or component are also described.