Light Source Module With Concentric Circle Structures
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Solution Overview
Problem
In floating imaging devices, precise alignment of the light shielding layer and lens array layer is challenging, leading to issues with large-angle stray light, which can be mitigated by using a collimated light source module but requires improved light source modules for better alignment tolerance and light control.
Innovation Solution
A light source module incorporating a light guide plate with upper and lower surface concentric circle structures and a light emitting element, where the light guide plate features lens microstructures and V-groove microstructures to control light beam divergence, allowing for uniform emission with a small divergence angle, thereby improving directivity and uniformity of light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional light source module is used, then the structure is simple, but the alignment tolerance between the light shielding layer and lens array layer is tight, leading to large-angle stray light
Solution Approach 1:
The light guide plate is segmented into multiple functional zones: a light receiving region with a light emitting element, an upper surface concentric circle structure, and a lower surface concentric circle structure. Each zone performs a specific light control function, allowing the system to achieve collimated light output without requiring complex external optical components, thus improving alignment tolerance while maintaining reasonable device complexity
Solution Approach 2:
The light guide plate acts as an intermediary component between the light emitting element and the lens array layer. It transforms the light from the emitting element into a collimated beam through its concentric circle structures, serving as a mediator that relaxes the alignment requirements between the light shielding layer and lens array layer
2Illumination intensity
If the light source module uses complex optical structures to improve light control, then light directivity and uniformity improve, but manufacturing complexity increases
Solution Approach 1:
Multiple light control functions are merged into a single light guide plate component. The upper surface concentric circle structure, lower surface concentric circle structure, and light emitting element are integrated into one piece, achieving both light directivity and uniformity without requiring multiple separate optical components, thus improving ease of manufacture while maintaining light quality
Solution Approach 2:
The concentric circle structures on the upper and lower surfaces of the light guide plate change the optical parameters of the light beam. By adjusting the geometry and arrangement of these concentric circles, the light distribution pattern can be optimized to achieve uniform illumination while maintaining straightforward manufacturing processes
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 enhances the directivity and uniformity of light emitted, relaxing alignment tolerance between the light shielding and lens array layers, reducing stray light and improving imaging quality in floating imaging devices.
Implementation Method 1
The V-groove microstructures are configured to break the total internal reflection of the light beam
Implementation Method 2
The lens microstructures are configured to refract the light beam
Data Source
AI summary
A light source module including a light guide plate and a light emitting element is provided. The light guide plate includes an upper surface concentric circle structure and a lower surface concentric circle structure opposite to the upper surface concentric circle structure. The center of the upper surface concentric circle structure corresponds to the center of the lower surface concentric circle structure. The light emitting element is disposed corresponding to the center of the upper surface concentric circle structure and the center of the lower surface concentric circle structure.