Wavelength Conversion Structure for Blocking Unwanted Lateral Light
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Solution Overview
Problem
Existing light-emitting devices do not effectively inhibit the impact of unwanted light portions on the desired emitting light, leading to inefficiencies and potential interference.
Innovation Solution
A light-emitting device design featuring a wavelength conversion member with a protrusion and a light-shielding region to control the path of unwanted light, ensuring it does not affect the desired emitting light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional light-emitting device structure is used, then the device is simple in structure, but unwanted light portions affect the desired emitting light
Solution Approach 1:
The wavelength conversion member is segmented into a wavelength conversion portion and a surrounding portion with a protrusion. This segmentation allows the protrusion to specifically block unwanted light portions while the wavelength conversion portion processes the desired light, thereby reducing light interference without requiring a completely separate shielding structure.
Solution Approach 2:
The surrounding portion of the wavelength conversion member is designed to serve dual functions: it houses the wavelength conversion portion and simultaneously acts as a light-shielding structure through its protrusion. This multi-functionality reduces the need for additional separate shielding components, maintaining structural simplicity while effectively blocking unwanted light.
2Object-affected harmful factors
If light-shielding members are added to block unwanted light, then light interference is reduced, but the device structure becomes more complex
Solution Approach 1:
The light-shielding function is merged with the wavelength conversion member by forming a surrounding portion with a protrusion. This integration eliminates the need for separate light-shielding members, reducing the total component count while maintaining effective blocking of unwanted light portions that would otherwise interfere with the desired emitting light.
3Volume of moving object
If the wavelength conversion member is positioned close to the light-emitting element, then the device size is reduced, but unwanted light easily interferes with the emitting light
Solution Approach 1:
The protrusion of the surrounding portion creates a localized light-shielding structure that specifically targets the blocking of unwanted light portions. This local quality enhancement allows the wavelength conversion member to be positioned close to the light-emitting element for compact device size, while the protrusion locally blocks interfering light paths without requiring increased separation distance.
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 effectively inhibits unwanted light from interfering with the desired emitting light, enhancing the efficiency and clarity of the emitted light output.
Implementation Method 1
light emitted from an emission end surface of the light-emitting element and traveling in the lateral direction is incident on the incident lateral surface, undergoes wavelength conversion in the wavelength conversion portion
Data Source
AI summary
A light-emitting device includes a base member, light-emitting element, and a wavelength conversion member. Light-emitting element is configured to emit light traveling in a lateral direction. The wavelength conversion member is disposed at a lateral side of the light-emitting element. The wavelength conversion member includes a wavelength conversion portion and a surrounding portion. The wavelength conversion portion having an incident lateral surface and an exit surface so that light is incident on the incident lateral surface, undergoes wavelength conversion in the wavelength conversion portion, and exits through the exit surface. The surrounding portion includes a protrusion located above the light-emitting element, and protruding outwardly toward a light-emitting element side with respect to the incident lateral surface with the protrusion overlapping with the emission end surface of the light-emitting element in a top view.