Solid State Lamp with Semi-Reflective Envelope for Glare Reduction
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Solution Overview
Problem
LED filament lamps cause glare at high intensities, leading to eye discomfort and potential vision-related problems due to excessive light reflection.
Innovation Solution
A lamp design featuring a semi-reflective envelope with a first solid state light source filament positioned close to the envelope and a second solid state light source farther away, where the reflectivity of the envelope is between 30% to 70%, allowing the first filament to be visible for aesthetic purposes while the second source reduces glare by emitting light without being visible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED filament lamps are used at high intensities, then main lighting function is improved, but glare is caused leading to eye discomfort
Solution Approach 1:
The lighting system is segmented into two distinct LED filament modules: a main illumination filament and a decorative filament. The main illumination filament provides high-intensity lighting, while the decorative filament positioned closer to the envelope creates aesthetic visual appeal without contributing to harmful glare. This segmentation allows independent optimization of each module's function.
Solution Approach 2:
Different regions of the lamp are assigned different functional qualities. The main illumination filament is positioned at an optimal distance for providing bright, functional lighting, while the decorative filament is positioned closer to the envelope where its light is diffused and aesthetic rather than intensely direct. This local differentiation of quality resolves the contradiction between intensity and glare.
2Shape
If LED filaments are positioned close to the envelope, then aesthetic appearance is improved, but glare increases
Solution Approach 1:
The lamp employs segmented filament positioning with two distinct modules serving different purposes. The decorative filament module is positioned close to the envelope to create aesthetic visual appeal through visible filament structure, while the main illumination module is positioned at an optimal distance for functional lighting without excessive glare.
Solution Approach 2:
Different spatial zones within the lamp are assigned different functional qualities. The region near the envelope is optimized for aesthetic appearance through the decorative filament, while the central region provides main illumination. This local quality differentiation allows aesthetic and functional requirements to be satisfied simultaneously without compromise.
3Device complexity
If a single LED filament module is used, then device complexity is reduced, but both main illumination and decorative appearance cannot be satisfied simultaneously
Solution Approach 1:
The lamp merges two distinct functional modules (main illumination filament and decorative filament) into a single integrated lamp structure with a unified envelope and base. This combining approach provides both main lighting and decorative appearance functions simultaneously while maintaining relatively simple overall device complexity through integrated design.
Solution Approach 2:
The lamp achieves multi-functionality by incorporating two LED filament modules that serve different purposes within a single device. The main illumination filament provides functional lighting, while the decorative filament provides aesthetic appeal. This universal design allows the lamp to satisfy multiple user requirements (both practical lighting and decorative appearance) simultaneously.
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 minimizes glare while maintaining a desirable aesthetic appearance, improving thermal management and visibility of the filament, and providing uniform lighting with reduced eye strain.
Implementation Method 1
the reflectivity of the semi-reflective envelope is in the range from 30% to 70% for light emitted by the at least one first solid state light source filament and the second solid state light source
Data Source
Figure 1A~1B
Figure 2
Figure 3A
AI summary
The present invention relates to a lamp (1), comprising a lamp base (3), a semi-reflective envelope (2), at least one first solid state light source filament (4a-d) arranged inside the semi-reflective envelope (2), and a second solid state light source (5) arranged inside the semi- reflective envelope (2), wherein the reflectivity of the semi-reflective envelope (2) is in the range from 30% to 70% for light emitted by the at least one first solid state light source filament (4a-d) and the second solid state light source (5), wherein the at least one first solid state light source filament (4a-d) is arranged at a first distance lower than 7 millimeters from the semi-reflective envelope (2), and wherein the second solid state light source (5) is arranged at second distance higher than 15 millimeters from the semi-reflective envelope (2).