Light-Emitting Module Layout for Uniform Luminance Control
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Solution Overview
Problem
Light-emitting modules with planar arrangements of light-emitting elements often experience luminance unevenness due to localized increases in luminance above the elements, which existing techniques have not adequately addressed.
Innovation Solution
A light-emitting module design featuring a substrate with a support member, wiring layers, light-emitting elements, light adjustment members, light-shielding members, and a light-transmissive member, where light adjustment members and light-shielding members are strategically positioned to reduce luminance unevenness by controlling light distribution and interference between elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light-emitting elements are arranged in a planar shape to create a backlight, then the light source can be generated, but luminance unevenness occurs due to localized increases in luminance above the elements
Solution Approach 1:
A light shielding member is introduced as an intermediary element positioned between adjacent light-emitting elements. This member includes a light shielding portion that blocks direct light from reaching specific regions, and a light reflecting portion that redirects light to uniform areas. By adding this intermediary component, the patent achieves luminance uniformity without fundamentally changing the planar arrangement of light-emitting elements, thus resolving the contradiction between luminance uniformity and structural complexity.
2Power
If light-emitting elements are positioned closely together to increase light output, then the overall luminance increases, but luminance unevenness and interference between elements worsens
Solution Approach 1:
The light shielding member is segmented into distinct functional portions: a light shielding portion that blocks light from specific directions, and a light reflecting portion that redirects light. This segmentation allows each portion to independently control light paths from closely positioned elements, enabling high overall luminance while maintaining uniformity by preventing interference between adjacent elements.
3Illumination intensity
If no light control structures are added to maintain simple structure, then device complexity remains low, but luminance unevenness cannot be corrected
Solution Approach 1:
The light shielding member's geometry is optimized with specific parameter relationships: the height H of the light shielding portion satisfies 0.3D < H < 0.7D (where D is the diagonal distance between light-emitting elements), and the reflecting portion has a specific angle range. These parameter specifications enable standardized manufacturing while achieving the desired light control effect, thus improving luminance uniformity without significantly complicating the manufacturing process.
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 module achieves reduced luminance unevenness by appropriately setting the dimensions and positions of light adjustment and light-shielding members, ensuring more uniform light emission and minimizing interference between adjacent light-emitting elements.
Implementation Method 1
At least one light-shielding member is provided on the first surface, provided surrounding a first light-emitting element among the plurality of light-emitting elements and a first light adjustment member among the plurality of light adjustment members in plan view, and provided between the first light-emitting element and a second light-emitting element among the plurality of light-emitting elements in cross-sectional view
Implementation Method 2
A light-transmissive member covers the first surface, the wiring layer, the plurality of light-emitting elements, the plurality of light adjustment members, and the light-shielding member
Data Source
AI summary
A light-emitting module including a substrate including a support member having a first surface and a wiring layer provided on the first surface, and a plurality of light-emitting elements provided on the first surface and electrically connected to the wiring layer. A plurality of light adjustment members is provided on a side of upper surfaces of the light-emitting elements, and spaced apart from the light-emitting elements, respectively. At least one light-shielding member is provided on the first surface, provided surrounding a first light-emitting element among the light-emitting elements and a first light adjustment member among the light adjustment members in plan view, and provided between the first light-emitting element and a second light-emitting element among the light-emitting elements in cross-sectional view. A light-transmissive member covers the first surface, the wiring layer, the light-emitting elements, the light adjustment members, and the at least one light-shielding member.