Light Emitting Module Lens Tangent Slope Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light emitting designs in image surveillance devices cause a dark band problem due to insufficient brightness in the light intersection region and occupy excessive internal space, affecting image capturing quality and device thinness.
Innovation Solution
A light emitting module with a lens featuring a first biconcave section, a second biconcave section, and a shared section, where the tangent slope of the shared section is optimized to connect these sections in a way that focuses light instead of diverging it, allowing for more uniform brightness and reduced volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If convex lenses and biconcave lenses are disposed alternately in front of light sources, then the light emitting range can cover the image capturing range, but a dark band problem occurs due to insufficient brightness in the light intersection region
Solution Approach 1:
The patent merges two separate biconcave lens sections into a single integrated lens structure with a shared section. This unified lens design eliminates the need for alternating convex and biconcave lenses, reducing structural complexity while maintaining the light diverging function and improving brightness uniformity in the intersection region.
Solution Approach 2:
The patent applies different tangent slope characteristics to different sections of the lens. The first and second biconcave sections have different tangent slopes at their connection points to the shared section, creating localized optical properties that optimize light distribution and eliminate dark bands while simplifying the overall structure.
2Illumination intensity
If biconcave lenses are disposed alternately and aligned with light sources, then light can be diverged to cover the image capturing range, but much internal space is occupied and the overall volume increases
Solution Approach 1:
The patent combines multiple lens functions into a single integrated lens structure. By merging the first biconcave section, second biconcave section, and shared section into one lens, the device achieves the required light diverging capability while occupying significantly less internal space, enabling thinner device design.
Solution Approach 2:
The integrated lens structure performs multiple optical functions simultaneously - it diverges light from multiple light sources, covers the required image capturing range, and maintains compact dimensions. This multi-functional design eliminates the need for separate alternating lenses, reducing overall device volume.
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 light uniformity in the intersection region, improving image capturing quality and reducing the overall volume of the image surveillance device, thus addressing the dark band issue and enabling a thinner design.
Implementation Method 1
The biconcave lenses are disposed alternately and aligned with the light sources respectively. In such a manner, after light emitted by the light sources is focused by the convex lenses, the light emitted by the light sources could be diverged by the biconcave lenses
Data Source
AI summary
A light emitting module includes a lens and first and second light sources aligning with the lens. The lens includes a first biconcave section having a first light-entrance concave surface and a first light-exit concave surface, a second biconcave section having a second light-entrance concave surface and a second light-exit concave surface, and a shared section having a light-exit shared surface. A tangent slope of the shared section where the light-exit shared surface is connected to the first light-exit concave surface is less than a tangent slope of the first biconcave section where the first light-exit concave surface is connected to the light-exit shared surface. A tangent slope of the shared section where the light-exit shared surface is connected to the second light-exit concave surface is larger than a tangent slope of the second biconcave section where the second light-exit concave surface is connected to the light-exit shared surface.