Light Emission Unit Layout for Uniform Partial Irradiation
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Solution Overview
Problem
Existing light sources with multiple light emitting elements struggle to achieve uniform emission characteristics during partial irradiation, leading to inefficiencies and non-uniform lighting.
Innovation Solution
A light source device comprising a substrate with a two-dimensionally arranged array of light emission units, including first, second, and third light emission units with specific light emission faces and a light shielding member to optimize emission characteristics during partial irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting elements are arranged in an array with uniform sizes, then the structure is simple and easy to manufacture, but emission uniformity during partial irradiation deteriorates
Solution Approach 1:
The patent applies local quality by making light emitting elements have different surface areas based on their position in the array. Central elements have smaller areas while peripheral elements have larger areas, creating non-uniform local characteristics that compensate for optical path differences and achieve uniform overall emission during partial irradiation.
2Ease of manufacture
If all light emission elements have the same surface area, then manufacturing is easier, but luminance uniformity during partial irradiation worsens
Solution Approach 1:
Different surface areas are assigned to light emitting elements based on their local position in the array. This local differentiation ensures that elements closer to the optical axis (with shorter optical paths) have smaller areas, while elements farther from the axis (with longer optical paths) have larger areas, maintaining luminance uniformity.
3Illumination intensity
If peripheral light emission elements have larger surface areas than central elements, then emission uniformity during partial irradiation is improved, but device complexity increases
Solution Approach 1:
The patent changes the physical parameter of surface area for light emitting elements based on their position. By systematically varying this parameter (smaller area for central elements, larger area for peripheral elements), the patent achieves uniform emission characteristics while maintaining a relatively simple array 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 provides improved emission characteristics during partial irradiation, reducing the generation of low luminance regions and enhancing luminance uniformity, thus achieving more effective and uniform lighting.
Implementation Method 1
a light source includes a plurality of light emission units 51 each including a light emitting element 20
Data Source
AI summary
A light source device includes a substrate and a light source. The light source includes a first light emission unit, a plurality of second light emission units, and a plurality of third light emission units arranged two-dimensionally on the substrate. The first light emission unit is arranged at a center among the light emission units, and includes a first light emission element having a first light emission face. The second light emission units surround the first light emission unit, and include a plurality of second light emission elements, respectively, each having a second light emission face. The third light emission units surround the second light emission units, and include a plurality of third light emission elements, respectively, each having a third light emission faces. The first light emission face and the second light emission faces all have the same areas. The third light emission faces have different areas.