Surface Mounted Light Emitting Device Rear Surface Protection
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Solution Overview
Problem
Conventional surface mounted light emitting devices face challenges in mass production due to complex structures that make it difficult to form protective elements without obstructing light emission, leading to increased costs and reduced efficiency.
Innovation Solution
A surface mounted light emitting device with two conductive regions on an insulation film, where a protective element, such as a printed resistance, is formed on the rear surface or inside the film, allowing for parallel connection to the light emitting element without obstructing light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective element is formed on the front surface of the light emitting device, then reliability is improved, but light emission efficiency deteriorates due to obstruction
Solution Approach 1:
The protective element is relocated from the front surface (where it would block light) to the rear surface or interior of the insulating film (where it cannot obstruct light emission). This spatial repositioning in another dimension maintains protective functionality while eliminating the negative impact on light emission efficiency.
Solution Approach 2:
The insulating film is divided into multiple layers, with the protective element formed within or on the rear surface of a specific layer. This segmentation allows the protective element to be positioned in a location that does not interfere with light emission from the light emitting element on the front surface.
2Manufacturing precision
If a complex structure with multiple layers is used, then protective element formation becomes difficult, but manufacturing precision improves
Solution Approach 1:
The protective element is nested within the insulating film structure or positioned on its rear surface, integrating the protective function into the existing multi-layer structure without requiring additional external components or complex assembly steps.
Solution Approach 2:
The insulating film serves multiple functions: electrical insulation, structural support, and housing for the protective element. This multi-functionality reduces the need for separate dedicated protective structures, simplifying the overall device complexity while maintaining manufacturing precision.
3Reliability
If conventional structures with sandwiched circuit wiring are used, then connection is achieved, but mass production cost increases due to dedicated processing requirements
Solution Approach 1:
The protective element formation process is merged with the existing insulating film fabrication process. By forming the protective element within or on the rear surface of the insulating film during the same manufacturing sequence, dedicated separate processing steps are eliminated, reducing manufacturing cost while maintaining connection reliability.
Solution Approach 2:
The protective element is formed preliminarily during the insulating film fabrication process, before final device assembly. This preliminary action integrates protection into the base structure, avoiding the need for subsequent dedicated processing steps that would increase manufacturing cost.
Data Source
AI summary
A surface mounted light emitting device having superior reliability with a focus on low cost producibility, in which a protective element can be formed without lowering the efficiency of light emission from a light emitting element, is provided.Since, for example, a printed resistance 16, as a protective element, is formed on at least the top surface side, the back surface side, or the inside of an insulating film 2 and, for example, the printed resistance 16, as a protective element, is formed on the rear surface side of the installation surface of a light emitting element 11, light emitted from the light emitting element 11 is not obstructed due to light blocking, light absorption or the like by, for example, the printed resistance 16, as a protective element.