Recessed Light-Emitting Structure for Low-Visibility Mobile Modules
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Solution Overview
Problem
Existing light-emitting devices are easily visually recognizable from the outside due to their reflective surfaces and structures, which affect their external appearance.
Innovation Solution
A light-emitting device design featuring a light-transmissive member with recessed portions and light-shielding members that expose lateral surfaces, reducing visibility while enhancing light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a light-emitting device uses a conventional structure with reflective surfaces and covering members, then the external appearance is improved, but the device becomes easily visually recognizable from the outside
Solution Approach 1:
The patent applies color matching between the covering member and wavelength conversion member to reduce visual recognizability. The covering member is designed with a body color that matches or closely resembles the body color of the wavelength conversion member, making the light-emitting device blend in with its surroundings and become less visually noticeable from the outside.
Solution Approach 2:
The patent introduces recessed portions in the light-transmissive member to create a stepped structure. This dimensional change allows the light-shielding member to be positioned at a lower level, exposing the lateral surface of the recessed portion while maintaining overall compactness. The multi-level structure reduces visual recognizability by creating shadows and reducing direct line-of-sight to internal components.
2Difficulty of detecting and measuring
If a light-transmissive member with recessed portions and light-shielding members is used, then visual recognizability is reduced, but light extraction efficiency may be affected
Solution Approach 1:
The patent segments the light-transmissive member into multiple levels using recessed portions. The first recessed portion creates a stepped structure that allows the light-shielding member to be positioned at a lower level. This segmentation enables the exposed lateral surface to serve dual purposes: reducing visual recognizability by creating shadows and maintaining light extraction efficiency by providing additional light extraction paths.
Solution Approach 2:
The patent applies local quality by positioning the light-shielding member specifically on the upper surface of the light-transmissive member while leaving the lateral surface of the recessed portion exposed. This localized shielding approach blocks light from specific viewing angles to reduce visual recognizability while preserving light extraction efficiency in other directions through the exposed lateral 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 design makes the light-emitting device less noticeable from the outside while maintaining high light extraction efficiency, improving its aesthetic integration into devices like smartphones and tablets.
Implementation Method 1
a light-transmissive member disposed over the light-emitting element and having an upper surface, a lower surface, and a first recessed portion that opens at the upper surface
Implementation Method 2
a first light-shielding member located on the upper surface of the light-transmissive member
Implementation Method 3
A lateral surface of the first recessed portion of the light-transmissive member is exposed from the first light-shielding member
Data Source
AI summary
A light-emitting device includes: a light-emitting element; a light-transmissive member disposed on the light-emitting element and having an upper surface, a lower surface, and a first recessed portion that opens at the upper surface; and a first light-shielding member located on the upper surface of the light-transmissive member. A lateral surface of the first recessed portion of the light-transmissive member is exposed from the first light-shielding member.