Light Source With Phosphor-Embedded Transmissive Members For Uniform Partial Irradiation
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Solution Overview
Problem
Existing light sources with two-dimensionally arranged light emitting elements face challenges in achieving uniform light emission during partial irradiation, leading to uneven light distribution.
Innovation Solution
The light source comprises a plurality of light emitting elements, light-transmissive members containing different phosphors for varying colors, and a light-blocking member. The light-transmissive members are arranged above the light emitting elements, with the light-blocking member covering the lateral surfaces of the light-transmissive members while exposing their upper surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light emitting elements are arranged two-dimensionally for partial irradiation capability, then versatility is improved, but light distribution uniformity deteriorates
Solution Approach 1:
The patent applies local quality by making each light-transmissive member have a specific lateral surface configuration that differs from other members. Each member's lateral surface includes a first surface and a second surface with different inclinations relative to the light emitting element, creating localized optical characteristics that collectively achieve uniform overall light distribution while maintaining partial irradiation capability
Solution Approach 2:
The patent changes the geometric parameters of the light-transmissive members by configuring their lateral surfaces with specific inclination angles. The first and second surfaces have different inclinations relative to the light emitting element, which modifies the light extraction and distribution characteristics to eliminate unevenness while preserving the two-dimensional arrangement for partial irradiation
2Adaptability or versatility
If light-transmissive members are arranged above light emitting elements for color variation, then versatility is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the light-transmissive members to serve multiple functions simultaneously: they provide color variation through different phosphors, control light distribution through their specific lateral surface geometry, and maintain structural organization in the two-dimensional arrangement. This multi-functionality reduces the need for separate components for each function
Solution Approach 2:
The patent uses composite materials by incorporating different phosphors into the light-transmissive members. Each member contains phosphors that emit specific colors, creating composite structures that achieve color variation while maintaining a unified structural approach that does not significantly increase device complexity
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 configuration effectively suppresses uneven light emission, ensuring uniform light distribution even when only some light emitting elements are activated, regardless of their position.
Implementation Method 1
a plurality of first light-transmissive members each containing a first phosphor, and a plurality of second-color light-transmissive members each containing a second phosphor configured to emit light having a different color from light emitted from the first phosphor
Data Source
AI summary
A light source includes a plurality of light emitting elements, a plurality of light-transmissive members, and a light-blocking member. The light-transmissive members are respectively arranged above the light emitting elements. The light-transmissive members include a plurality of first light-transmissive members each containing a first phosphor, and a plurality of second-color light-transmissive members each containing a second phosphor configured to emit light having a different color from light emitted from the first phosphor. At least one of the first light-transmissive members is arranged between adjacent ones of the second light-transmissive members in a plan view. The light-blocking member covers lateral surfaces of the light-transmissive members while upper surfaces of the light-transmissive members are exposed from the light-blocking member.