Light-Emitting Module With Hole-Embedded Light Source
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Solution Overview
Problem
Existing light-emitting modules face challenges in reducing thickness while maintaining optical uniformity, leading to size limitations in devices that utilize them as backlights.
Innovation Solution
A light-emitting module design featuring a two-dimensional array of light-emitting units, each comprising a lightguide plate with a first hole portion and a light diffusing layer, where the light source is partially housed within the hole portion, and the light diffusing layer covers part of the lateral surfaces to enhance optical uniformity and reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of the light-emitting module is reduced, then the device size is reduced, but luminance non-uniformity increases
Solution Approach 1:
The lightguide plate is segmented into multiple regions with different refractive indices or optical properties. This segmentation allows different portions of the lightguide plate to control light propagation differently, enabling uniform luminance distribution even in a thin module structure.
Solution Approach 2:
Different regions of the lightguide plate are given different local optical qualities, such as varying refractive indices or light diffusion characteristics. This local quality variation ensures that light is distributed uniformly across the emission surface while maintaining reduced overall thickness.
2Length of moving object
If the thickness of the light-emitting module is reduced, then the device size is reduced, but optical uniformity deteriorates
Solution Approach 1:
The lightguide plate is divided into multiple optical zones with distinct characteristics. This segmentation enables each zone to contribute differently to the overall light distribution, maintaining optical uniformity despite the reduced thickness of the module.
Solution Approach 2:
Each segmented region of the lightguide plate possesses tailored local optical properties that compensate for the reduced thickness. This local quality optimization ensures stable and uniform optical performance across the entire emission surface.
3Volume of moving object
If the thickness of the light-emitting module is reduced, then the device size is reduced
Solution Approach 1:
The lightguide plate is segmented into multiple functional regions that work together to distribute light uniformly. This segmentation allows the module to achieve compact dimensions while preventing luminance non-uniformity through coordinated light control across different segments.
Solution Approach 2:
Different regions of the lightguide plate are assigned specific local optical qualities that optimize light distribution. This local quality differentiation enables the module to maintain small size while achieving uniform luminance output across the emission surface.
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 achieves improved optical uniformity and reduced thickness, enabling further miniaturization of devices while minimizing luminance non-uniformity across the emission surface.
Implementation Method 1
The light diffusing layer covers part of the at least one lateral surface of the first hole portion
Data Source
AI summary
A light-emitting module includes a two-dimensional array of a plurality of light-emitting units. Each of the light-emitting units includes a lightguide plate, a light source, and a light diffusing layer. The light guide plate has a first surface and a first hole portion. The first hole portion has at least one lateral surface and an opening at the first surface. The light source is provided at least partially inside the first hole portion. The light source includes a light-emitting element. The light diffusing layer covers part of the at least one lateral surface of the first hole portion.