Lightguide Plate Hole with Sloping Surfaces and Reflective Resin
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Solution Overview
Problem
Existing light emitting modules face challenges in reducing thickness while maintaining light uniformity, leading to luminance unevenness issues.
Innovation Solution
A light emitting module design featuring a lightguide plate with a first hole having sloping lateral surfaces and a reflective resin layer positioned within the first hole, which diffuses light efficiently and reduces luminance variations across the emission surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the thickness of the light emitting module is reduced, then the size of the device is reduced, but luminance unevenness occurs
Solution Approach 1:
The patent applies local quality by creating a hole with different lateral surface characteristics at different locations. The first lateral surface has a first inclination angle while the second lateral surface has a second inclination angle, allowing different regions of the hole to reflect and distribute light differently to achieve uniform luminance across the emission surface despite reduced module thickness.
Solution Approach 2:
The patent employs asymmetry by designing the hole with non-uniform lateral surfaces having different inclination angles. The first lateral surface and second lateral surface are asymmetric in their geometry, enabling optimized light reflection paths from the light emitting element to achieve uniform light distribution across the emission surface while maintaining compact thickness.
2Illumination intensity
If a light-reflecting layer with openings is used to improve light evenness, then luminance uniformity is improved, but the device complexity increases
Solution Approach 1:
The patent merges the light-reflecting function with the structural hole by forming the reflective layer directly on the lateral surfaces of the hole. This integration combines the light reflection function with the existing hole structure, eliminating the need for separate complex optical components while achieving uniform luminance distribution.
Solution Approach 2:
The hole structure serves multiple functions: it holds the light emitting element, provides light reflection through its lateral surfaces, and distributes light uniformly across the emission surface. This multi-functionality reduces the need for additional separate components, thereby simplifying the overall device structure.
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 light uniformity and reduced thickness, effectively addressing luminance unevenness by utilizing the reflective resin layer to distribute light evenly across the emission surface.
Implementation Method 1
a reflective resin layer, wherein the first hole includes a first portion and a second portion, the first portion includes a first lateral surface sloping with respect to the upper surface, the second portion has a second lateral surface sloping with respect to the upper surface, the second lateral surface being present between an opening in the upper surface and the first lateral surface of the first portion, and the reflective resin layer is located in the first portion of the first hole
Data Source
AI summary
A light emitting module includes: a lightguide plate having an upper surface and a lower surface opposite to the upper surface, the upper surface including a first hole; a light emitting element on a lower surface side of the lightguide plate, the light emitting element facing the first hole; and a reflective resin layer, wherein the first hole includes a first portion and a second portion, the first portion includes a first lateral surface sloping with respect to the upper surface, the second portion has a second lateral surface sloping with respect to the upper surface, the second lateral surface being present between an opening in the upper surface and the first lateral surface of the first portion, and the reflective resin layer is located in the first portion of the first hole.