Light Emitting Module Thinning via Nested Light Guide Plate
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Solution Overview
Problem
Existing light emitting modules are not capable of being made thinner while maintaining stable optical characteristics, which is a limitation in various display devices where space and efficiency are crucial.
Innovation Solution
A light emitting module is manufactured by integrating a light source with a light guide plate using a joining member, where the light source is disposed in a through-hole of the light guide plate with an intermediate penetration portion narrower than the light source's surface, allowing for efficient light reflection and emission without the thickness constraints of the light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the light guide plate thickness is reduced to make the module thinner, then the module thickness is improved, but the optical characteristics become unstable
Solution Approach 1:
The light source is nested within the through-hole of the light guide plate, with the intermediate penetration portion providing a narrower region that accommodates the light source while maintaining proper optical alignment. This nesting structure allows the light source to be positioned at an optimal depth without requiring excessive light guide plate thickness, thereby reducing overall module thickness while preserving stable optical characteristics.
Solution Approach 2:
The through-hole structure creates local variations in the light guide plate, with the intermediate penetration portion having a narrower width than the first and second penetration portions. This local quality change allows for precise control of light emission characteristics at the light source position while maintaining overall module thinness, as the narrowed region provides focused optical interaction without requiring the entire light guide plate to be thick.
2Length of moving object
If the light source is positioned closer to the light guide plate surface to reduce thickness, then the module thickness is improved, but light reflection and emission efficiency deteriorates
Solution Approach 1:
The light source is nested within the through-hole structure at an optimized depth position. The intermediate penetration portion's narrower width provides a controlled environment that ensures efficient light reflection and emission, allowing the light source to be positioned close to the surface without sacrificing optical efficiency. The nesting structure maintains proper spacing and alignment for optimal light extraction.
Solution Approach 2:
The through-hole dimensions are specifically designed with the intermediate penetration portion having a narrower width than the first and second penetration portions. This parameter change creates an optimized optical path that enhances light reflection and emission efficiency while allowing for reduced module thickness. The narrowed intermediate region provides focused light interaction that improves illumination intensity despite the reduced overall thickness.
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 approach enables the creation of a thinner light emitting module with stable optical characteristics, suitable for use in display devices, by optimizing the light source's placement and reflection within the light guide plate structure.
Implementation Method 1
allowing for efficient light reflection and emission without the thickness constraints of the light guide plate
Data Source
AI summary
A method for manufacturing a light emitting module includes: providing a light source including a first surface having a pair of electrodes, and a second surface; providing a light guide plate including a first main surface and a second main surface, the light guide plate defining a through-hole extending through the light guide plate from the first main surface to the second main surface, the through-hole having a first penetration portion disposed on a first main surface side, a second penetration portion disposed on a second main surface side, and an intermediate penetration portion connecting the first penetration portion and the second penetration portion, the intermediate penetration portion being narrower in width than the second surface of the light source; and disposing the light source in the second penetration portion of the light guide plate with a joining member being interposed between the light source and the light guide plate.