LED Light Module Shield Clamping for Scattered Ray Blocking
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Solution Overview
Problem
Conventional light-emitting modules face challenges in ensuring that scattered light rays from point light sources are properly reflected along a desired emission axis, leading to reduced photometric performance due to the inability to effectively position and fix shields to block these rays.
Innovation Solution
A light-emitting module design featuring a shield clamped between a printed circuit board and a fixing plate, with optical deflection means and reflective surfaces, utilizes a frame with indexing fins and complementary fastening means to precisely position the shield relative to the collector and diode, optimizing the blocking of scattered light rays without interfering with light diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a shield is used to block scattered light rays, then photometric performance is improved, but positioning and fixing the shield correctly becomes complex
Solution Approach 1:
The shield is merged with the printed circuit board assembly by clamping the shield between the PCB and the fixing plate. This integration eliminates the need for separate complex positioning mechanisms, as the shield's position is automatically determined by the clamping arrangement between two existing structural elements.
Solution Approach 2:
The clamping mechanism acts as an intermediary between the shield and the collector assembly. By using the clamping force between the printed circuit board and fixing plate as the positioning mechanism, the system achieves precise shield positioning without requiring additional complex fixing structures.
2Illumination intensity
If the shield blocks scattered rays, then light emission directionality is improved, but the shield may block useful rays and reduce overall light output
Solution Approach 1:
The shield is positioned locally at the diode level rather than as a large centralized component. This localized positioning allows the shield to block only the scattered rays from the specific diode source while leaving the optical path for useful reflected rays from the collector untouched. The shield's small size and precise positioning ensure it intercepts only harmful scattered light.
3Ease of manufacture
If simple fixing means are used for the shield, then manufacturing ease is improved, but positioning precision may be compromised
Solution Approach 1:
The clamping mechanism between the printed circuit board and fixing plate creates a self-positioning system. The shield automatically achieves correct positioning through the mechanical constraints of the clamping arrangement, without requiring external alignment tools or complex adjustment procedures. The structure itself provides the positioning function.
Solution Approach 2:
The clamping arrangement creates a mechanically stable positioning system where the shield is held at a fixed potential position relative to the diode and collector. The equi-potential clamping force ensures consistent positioning across all assembly units, achieving manufacturing precision through uniform mechanical constraints rather than varied adjustment procedures.
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
This design enhances the positioning of the shield to effectively block scattered light rays, improving the photometric performance of the module by ensuring accurate alignment and secure fixation without compromising light transmission.
Implementation Method 1
the collector comprises optical deflection means with a reflective surface, for example a support coated with a layer of reflective material
Implementation Method 2
a shield disposed in the vicinity of the diode to block rays emitted directly by the diode
Data Source
Figure 1~2
Figure 3~5
Figure 6~9
AI summary
The invention relates to a light-emitting module comprising a light-emitting diode (8) capable of emitting light rays into optical deflection means of a collector (4) and supported by a printed circuit board (6). The module includes a shield (12) disposed near the diode (8) to block rays emitted directly by the diode. According to the invention, the collector (4) includes a mounting plate (16), which notably allows the printed circuit board (6) and the diode (8) to be fixed relative to the optical deflection means. The shield (12) is held in position relative to the light-emitting diode (8) by clamping between the printed circuit board (6) and the mounting plate (16) of the collector (4).