Light Source Module Lens Structure and Light Guide Element
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Solution Overview
Problem
Current light source modules using point light sources for plane light sources suffer from low light utilization efficiency due to excessive diffusion angles, leading to reduced brightness and non-uniform light distribution, as they often rely on diffusion plates that scatter light, reducing the amount of light directed towards the viewer.
Innovation Solution
A light source module design incorporating a light emitting unit with a lens structure and a light guide element, featuring specific recesses and micro-structures that refract and reflect light beams to focus them uniformly onto the viewing direction, eliminating the need for conventional diffusion plates and enhancing light utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a lens structure is used to diffuse light beams from point light sources, then uniformity of light distribution is improved, but diffusion angle becomes too large and brightness received by human eyes is reduced
Solution Approach 1:
The invention divides the light guide element into multiple regions with different optical properties. The first light guide element has a first refractive index and the second light guide element has a second refractive index different from the first, creating segmented optical zones that control light diffusion at different stages to achieve both uniformity and adequate brightness.
Solution Approach 2:
Different portions of the light guide element are assigned different refractive indices to perform different functions. The first light guide element region provides initial light distribution while the second light guide element region provides secondary diffusion, with each region optimized for its specific function to balance uniformity and brightness.
2Illumination intensity
If a diffusion plate is disposed before the lens structure to guide light beams with overly large diffusion angles, then brightness received by human eyes is improved, but light beams are scattered by scattering particles and light utilization efficiency is reduced
Solution Approach 1:
The invention replaces the conventional diffusion plate with scattering particles with a refractive index-matched interface between two light guide elements. This substitution eliminates the scattering mechanism that causes light loss while maintaining the light guiding function through refractive index differences, thereby improving both brightness and light utilization efficiency.
Solution Approach 2:
The interface between the first and second light guide elements acts as an intermediary optical element that redirects light beams without scattering. This intermediate structure provides a controlled transition for light propagation, replacing the uncontrolled scattering that occurs in diffusion plates.
3Stability of the object's composition
If conventional diffusion plates are used to direct light beams towards viewing direction, then light distribution is improved, but light scattering increases and light utilization efficiency decreases
Solution Approach 1:
The invention replaces the diffusion plate's scattering mechanism with a refractive index-based light guiding mechanism. The first and second light guide elements with different refractive indices create controlled light redirection without scattering, maintaining distribution stability while eliminating energy loss associated with scattering.
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 module achieves high light utilization efficiency and uniformity by directing light beams without the need for diffusion plates, ensuring that more light is focused on the viewer, thereby improving brightness and consistency.
Implementation Method 1
the light beam from the point light source is diffused by a lens structure
Implementation Method 2
The light guide element includes a first light guide element and a second light guide element
Data Source
AI summary
A light source module is provided, which includes at least one light emitting unit and at least one light guide element. The light emitting unit includes a light source and a lens structure. The light source is used for emitting a light beam. The lens structure has a bottom surface, a top surface opposite to the bottom surface, and a first surface connecting the bottom surface and the top surface. The bottom surface has a first recess and a second recess connecting the first recess and the first surface. The top surface has a third recess. The light guide element includes at least one opening and a plurality of first optical micro-structures disposed beside the opening. The light emitting unit is disposed in the opening. The light beam passes through the lens structure and enters the light guide element via the opening.