Array Light Source Shielding Structure for Uniform Partial Irradiation
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Solution Overview
Problem
Existing light sources with arrays of light emitting elements face challenges in achieving uniform emission characteristics during partial irradiation, leading to issues like low luminance regions and color non-uniformity between emission units.
Innovation Solution
A light source design incorporating one-dimensionally or two-dimensionally arranged light emitting elements, wavelength conversion members, first and second light diffusing members, a light transmitting member, and a light shielding member, along with a manufacturing method that includes forming grooves and a conductive layer, to enhance emission characteristics and reduce dark lines and chromaticity deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light emitting elements are arranged in an array for partial irradiation capability, then versatility and adaptability are improved, but emission uniformity and luminance distribution deteriorate
Solution Approach 1:
A light shielding member is introduced as an intermediary component between adjacent light emitting elements. This member includes light shielding portions that extend from the lower surface toward the upper surface, positioned in grooves between adjacent elements. The light shielding portions block stray light and prevent light leakage between adjacent emission units, thereby improving emission uniformity while preserving the partial irradiation capability of the array configuration.
2Illumination intensity
If light shielding structures are added to improve emission uniformity, then illumination intensity uniformity is improved, but device complexity increases
Solution Approach 1:
The light shielding member serves multiple functions simultaneously: it provides light shielding between adjacent elements, structurally supports the wavelength conversion members and first light diffusing members through integration with grooves, and enables precise positioning of optical components. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved emission uniformity.
Solution Approach 2:
The light shielding portions are nested within grooves formed in the light shielding member, creating a compact integrated structure. The wavelength conversion members and first light diffusing members are positioned within the upper portion spaces of the grooves, forming a nested arrangement that optimizes space utilization and reduces overall device complexity.
3Illumination intensity
If wavelength conversion members are placed on each light emitting element, then color uniformity is improved, but manufacturing precision requirements increase
Solution Approach 1:
Grooves are pre-formed in the light shielding member before mounting the light emitting elements. These grooves serve as predetermined positioning structures that guide and constrain the placement of wavelength conversion members and first light diffusing members. By establishing the positioning framework in advance, the manufacturing process achieves better alignment precision without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
The patent employs a modular design where wavelength conversion members can be individually replaced or adjusted. This approach allows for simplified manufacturing processes with relaxed precision requirements during assembly, as minor positioning variations can be compensated through individual component replacement rather than requiring high-precision fixed positioning for all components.
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 emission characteristics during partial irradiation by reducing low luminance regions and color non-uniformity, resulting in a light source with enhanced contrast and uniformity between emission and non-emission regions.
Implementation Method 1
a plurality of wavelength conversion members 30, a first light diffusing member 40
Implementation Method 2
Each of the first light diffusing members 40 is disposed on a respective one of the wavelength conversion members 30
Implementation Method 3
The light transmitting member 50 is disposed over the first light diffusing members 40 and continuously covers the first light diffusing members
Implementation Method 4
The second light diffusing member 60 is disposed on the light transmitting member 50
Implementation Method 5
The light shielding member 70 covers lateral surfaces of the light emitting elements, lateral surfaces of the wavelength conversion members, and lateral surfaces of the first light diffusing members
Data Source
AI summary
A light source includes a plurality of light emitting elements one-dimensionally or two-dimensionally arranged, a plurality of wavelength conversion members, a plurality of first light diffusing members, a light transmitting member, a second light diffusing member, and a light shielding member. Each of the light emitting elements has a light emission surface and an electrode surface. Each of the wavelength conversion members is disposed on the light emission surface of a respective one of the light emitting elements. Each of the first light diffusing members is disposed on a respective one of the wavelength conversion members. The light transmitting member continuously covers the first light diffusing members. The second light diffusing member is disposed on the light transmitting member. The light shielding member covers lateral surfaces of the light emitting elements, lateral surfaces of the wavelength conversion members, and lateral surfaces of the first light diffusing members.