Light Source Pressing Member for Heat Radiator Positioning

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Solution Overview

Problem

The existing light source devices with positioning pins on the heat radiator's placement surface face increased manufacturing costs due to complex shapes and difficulty in removing the light source without thermally conductive grease causing surface tension issues.

Innovation Solution

A light source device design featuring a pressing member that presses the light source against the heat radiator's placement surface, with positioning pins inserted into corresponding holes, and a fixing member to secure the pressing member to the heat radiator, allowing for easy removal of the light source.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a positioning pin protruding from the placement surface is used to position the light source, then the light source can be positioned on the placement surface, but the shape of the heat radiator becomes complicated which increases manufacturing costs

Engineering Contradiction:

Improvepositioning precisionVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The positioning function is segmented from the heat radiator body. Instead of forming positioning pins directly on the heat radiator, a separate pressing member with positioning pins is introduced. This pressing member can be easily attached to the heat radiator, allowing the heat radiator to maintain a simple, cost-effective shape while still achieving precise positioning through the pressing member's positioning pins.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pressing member acts as an intermediary between the heat radiator and the light source. It carries the positioning pins and also provides the pressing force. This intermediary component allows the heat radiator to remain simple in structure while achieving both positioning and pressing functions through the pressing member.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of energy

If thermally conductive grease is interposed between the light source and the heat radiator to efficiently release heat, then heat release efficiency is improved, but surface tension due to the grease acts between the light source and the placement surface making it difficult to separate the light source from the placement surface

Engineering Contradiction:

Improveheat release efficiencyVSAvoidease of removal

Core Design Contradiction:

Loss of energyVSEase of operation

Solution Approach 1:

The pressing member is designed to press the light source against the heat radiator before final assembly. This preliminary pressing action ensures good thermal contact for efficient heat release, while the structured pressing mechanism (with positioning pins fitting into positioning holes) provides a controlled force that can be easily released when removal is needed, overcoming the surface tension issue.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The reliance on surface tension adhesion is replaced with a mechanical pressing system. The pressing member provides controlled mechanical pressure to ensure thermal contact, and can be easily removed by overcoming this mechanical force, rather than requiring breaking of surface tension bonds from thermally conductive grease.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 design reduces manufacturing costs by simplifying the heat radiator's shape and facilitates easy removal of the light source from the heat radiator, overcoming surface tension issues caused by thermally conductive grease.

Implementation Method 1

a pressing member configured to press the light source against the placement surface

Methodology Applied

Scientific EffectPressure: Pressure Increase

Implementation Method 2

when thermally conductive grease is interposed between the light source and the heat radiator to efficiently release heat from the light source to the heat radiator

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

surface tension due to the grease acts between the light source and the placement surface

Methodology Applied

Scientific EffectSurface tension: Surface Tension

Data Source

PatentUS20250180190A1Light source device and projector

Publication Date: 2025.06.05 SHARP NEC DISPLAY SOLUTIONS LTD

AI summary

A light source device includes a light source having at least a first positioning hole; a heat radiator that has a placement surface on which the light source is placed, the heat radiator that has at least a second positioning hole on the placement surface; a pressing member configured to press the light source against the placement surface; and a fixing member that fixes the pressing member to the heat radiator, while the pressing member pressing the light source against the placement surface. The pressing member has at least a first positioning pin inserted into the at least first positioning hole of the light source, and at least a second positioning pin inserted into the at least second positioning hole on the placement surface of the heat radiator.