Light-emitting Module With Perpendicular Mounting Surface

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Solution Overview

Problem

Conventional light-emitting modules face challenges in stable and reliable mounting due to the orientation of their main emission direction, which can lead to instability when connected to mounting boards in electronic devices.

Innovation Solution

A light-emitting module design featuring a base with a mounting surface perpendicular to the installation surface, paired with a wiring pattern that includes mounting-surface electrodes covering recesses on the base, allowing for secure electrical contact and stable mounting on a mounting board.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the light-emitting module uses a conventional base design with installation surface only, then the structure is simple, but the mounting reliability and stability are insufficient

Engineering Contradiction:
Improvemounting reliabilityVSAvoidbase structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The base is divided into two distinct surfaces: an installation surface for mounting the light-emitting element and a mounting surface for attaching to the circuit board. This segmentation allows each surface to be optimized for its specific function, improving overall mounting reliability while maintaining structural clarity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The base structure transitions from a single-plane installation surface to a multi-dimensional configuration with installation surface and mounting surface oriented at right angles to each other. This dimensional change enables simultaneous optimization for both element installation and board mounting, resolving the reliability-complexity contradiction

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Stability of the object's composition

If the light-emitting module uses a base with mounting surface perpendicular to installation surface, then the mounting stability improves, but the manufacturing complexity increases

Engineering Contradiction:
Improvemounting stabilityVSAvoidbase manufacturing ease
Core Design Contradiction:
Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

Mounting recesses are pre-formed on the mounting surface before final assembly. These recesses preliminarily position the mounting-surface electrodes, ensuring stable mounting orientation and preventing rotation during subsequent assembly steps, thereby improving mounting stability without requiring complex post-processing

Inventive Principle:
Principle #10Preliminary action

3Strength

If the wiring pattern includes mounting-surface electrodes covering recesses, then the mounting strength increases, but the manufacturing precision requirements increase

Engineering Contradiction:
Improvemounting strengthVSAvoidelectrode positioning precision
Core Design Contradiction:
StrengthVSManufacturing precision

Solution Approach 1:

The mounting recesses serve as pre-prepared cushions or guides that accommodate the mounting-surface electrodes. By beforehand creating these recesses with appropriate dimensions and positions, the design compensates for potential positioning variations, allowing robust solder joint formation without requiring extremely tight electrode positioning tolerances

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

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 enables stable and reliable mounting of the light-emitting module on a mounting board, enhancing the module's mounting strength and preventing rotation, while ensuring efficient light emission.

Implementation Method 1

improving emission efficiency by reflecting light from the light-emitting element

Methodology Applied
Scientific EffectLight reflection: Reflection

Data Source

PatentUS10090448B2Light-emitting module, light-emitting device and method of making light-emitting module
Publication Date: 2018.10.02 ROHM CO LTD
  • US10090448B2 patent drawing
  • US10090448B2 patent drawing
  • US10090448B2 patent drawing

AI summary

A light-emitting module is provided with a light-emitting element, a base, and a wiring pattern. The base includes an installation surface facing in a first direction and a mounting surface facing in a second direction which is at right angles to the first direction. The light-emitting element is installed on the installation surface. The wiring pattern is formed on the base and is in electrical contact with the light-emitting element. The base includes a pair of mounting recesses recessed from the mounting surface and spaced from each other in a third direction which is at right angles to both the first direction and the second direction. The wiring pattern includes a pair of mounting-surface electrodes respectively covering at least a part of the pair of mounting recesses.