Optical Member Light Controller Geometry for Axis Deviation
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Solution Overview
Problem
Existing optical members experience optical axis deviation due to positional deviations between the light source and the light controller, which affects the efficiency of light emission.
Innovation Solution
The optical member incorporates a plurality of light controllers with specific surface geometries, including a convex surface and a concave surface, where the radius of curvature of the concave surface is smaller than that of the convex surface, and the first distance from the first surface to the topmost portion of the convex surface is 4.5 times or more the second distance from the first surface to the deepest portion of the concave surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a light controller is disposed above a light source, then the light emission structure is compact, but optical axis deviation occurs due to positional deviation between the light source and the light controller
Solution Approach 1:
The patent applies preliminary action by pre-configuring the light controller with specific surface geometries (concave and convex surfaces with defined radius of curvature relationships) before the actual light emission operation. The concave surface is designed with a smaller radius of curvature than the convex surface, and the centers are aligned in plan view, creating a built-in compensation mechanism that proactively counteracts potential optical axis deviations before they affect performance
Solution Approach 2:
The patent employs parameter changes by establishing specific geometric parameters of the light controller surfaces. The key parameter relationship is that the radius of curvature of the concave surface is smaller than that of the convex surface, and the first distance (from first surface to topmost portion of convex surface) is 4.5 times or more the second distance (from first surface to deepest portion of concave surface). These parameter relationships create tolerance to positional deviations while maintaining optical axis alignment
2Manufacturing precision
If the radius of curvature of the concave surface is made smaller than that of the convex surface, then optical axis deviation is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent applies spheroidality by designing both the concave and convex surfaces with spherical curvature characteristics. The concave surface has a smaller radius of curvature than the convex surface, creating a specific curvature relationship that optimizes light control. This curved surface design enables the light controller to maintain optical axis alignment through geometric compensation rather than requiring extreme manufacturing precision
Solution Approach 2:
The patent employs asymmetry in the surface geometry design where the concave surface and convex surface have different radius of curvature values. Specifically, the concave surface has a smaller radius of curvature than the convex surface, creating an asymmetric configuration that provides optical axis deviation compensation. This asymmetric design is optimized to balance performance improvement with manufacturing feasibility
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 configuration reduces optical axis deviation caused by positional deviations between the light source and the light controller, maintaining a small change in the peak angle of light emitted, thereby enhancing the light emission efficiency.
Implementation Method 1
a concave surface that opens at the first surface and is curved from the first surface toward the convex surface
Implementation Method 2
configured to converge light beams from the light emitting diodes
Data Source
AI summary
An optical member includes: a plurality of light controllers, each including: a first surface, a convex surface that is located opposite to the first surface and is curved in a direction away from the first surface, and a concave surface that opens at the first surface and is curved from the first surface toward the convex surface. A radius of curvature of the concave surface is less than a radius of curvature of the convex surface. In a plan view, a center of the concave surface coincides with a center of the convex surface. A first distance from the first surface to a topmost portion of the convex surface is 4.5 times or more a second distance from the first surface to a deepest portion of the concave surface.