Light Control Body Focal Separation for Light Guide Plate Coupling
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Solution Overview
Problem
In existing optical systems, when the size of the light source exceeds a certain size relative to the light guide plate, the light emitted from the end part of the light source cannot be effectively controlled, leading to reduced light extraction efficiency due to coinciding focal positions of refractive and reflective surfaces, and the light guide plate may be damaged if the light source is brought closer to mitigate this.
Innovation Solution
The optical system includes a light source, a light guide plate with inclined first and second surfaces, and a light control body with distinct focal positions for its incident and reflection surfaces, which are set to differ from the light emission surface, allowing for improved light control and extraction efficiency without risking damage to the light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the light source size is increased, then the light source can emit more light, but the light from the end part of the light source cannot be effectively controlled and light extraction efficiency is reduced
Solution Approach 1:
The light control body is designed with different surface characteristics at different locations: the first incident surface has a specific curvature radius to control light from the end part of the light source, while the second incident surface has a different curvature radius to control light from other parts. This local differentiation allows each region to optimize light control for its specific function, enabling the system to handle larger light sources without compromising extraction efficiency.
2Productivity
If the light source is brought closer to the light guide plate, then light control may be improved, but the light guide plate may be damaged
Solution Approach 1:
The light control body acts as an intermediary component positioned between the light source and the light guide plate. It controls and redirects light from the light source toward the light guide plate without requiring the light source to be in direct contact or close proximity to the plate, thus preventing thermal damage while maintaining effective light control through its specially designed curved surfaces.
3Device complexity
If the focal positions of refractive and reflective surfaces coincide, then the optical system is simplified, but light from the end part of the light source cannot be effectively controlled
Solution Approach 1:
The light control body employs different curvature radii for its first and second incident surfaces, creating distinct focal characteristics in different regions. The first incident surface has a curvature radius that focuses light from the end part of the light source, while the second incident surface has a different curvature radius for other light portions. This local differentiation in optical properties enables effective control of light from the entire light source without requiring a complex multi-component system.
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 enhances light extraction efficiency by effectively directing light from the light source to the light guide plate's surfaces, improving the utilization of light and reducing the impact of the light source size, while maintaining the integrity of the light guide plate material.
Implementation Method 1
a light control body that condenses light directed to the incident surface and emits the condensed light toward the incident surface
Implementation Method 2
The first incident surface has a first focal position where parallel light converges at one point when the parallel light is incident on the first incident surface
Implementation Method 3
The first surface is provided with a prism that reflects light passing through an inside of the light guide plate, toward the second surface
Data Source
AI summary
Light control body (6) has first incident surface (7) and first reflection surface (9). First incident surface (7) condenses part of light emitted from light source (1) and emits the light toward incident surface (3) of light guide plate (2). First reflection surface (9) reflects the light that is emitted from light source (1) and does not pass through first incident surface (7), and emits the light toward incident surface (3) of light guide plate (2). First focal position (11) of first incident surface (7) and second focal position (12) of first reflection surface (9) are set at positions that are different from each other and away from the light emission surface of light source (1).