Projection Display Dust-Proof Structure with Asymmetric Suction Ports

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Projection type display devices face challenges in maintaining dust-proof and cooling efficiency due to dust ingress and air filter-related issues, which affect display quality and component lifespan.

Innovation Solution

A display device design featuring a dust-proof structure with specific suction port configurations and a rib structure wall to prevent dust ingress and enhance cooling efficiency without an air filter, allowing for efficient cooling of optical components while minimizing noise and dust exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a dust-proof wall is used to seal all optical components, then dust-proof characteristics are improved, but heat radiation is prevented causing temperature increase of optical components

Engineering Contradiction:

Improvedust-proof characteristicsVSAvoidtemperature of optical components

Core Design Contradiction:

Object-affected harmful factorsVSTemperature

Solution Approach 1:

The dust-proof structure is divided into multiple walls (first through fourth walls) that enclose optical components from different directions. This segmentation allows selective opening of specific walls (second and fourth walls) to enable heat dissipation while maintaining dust protection through the remaining sealed walls (first and third walls).

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different walls of the dust-proof structure have different properties: the first and third walls remain sealed for dust protection, while the second and fourth walls are opened or provided with openings to allow heat radiation. This local differentiation resolves the contradiction between dust-proofing and heat dissipation.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If an air filter is used to remove dust from cooling air, then dust removal is improved, but the air filter becomes rough and clogged requiring cleaning or replacement

Engineering Contradiction:

Improvedust removal efficiencyVSAvoidmaintenance burden of air filter

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The air filter is completely removed from the system. Instead of filtering air through a filter that accumulates dust, the invention extracts the dust removal function by using the dust-proof wall structure to block dust at the source while allowing unfiltered air to pass through openings for cooling.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention converts the harmful effect of dust in air into a beneficial design feature by using the dust-proof walls to selectively block dust while allowing air flow. The dust that would normally clog filters is instead blocked by the wall structure, turning a maintenance problem into a structural solution.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Object-affected harmful factors

If a fine air filter is used to collect small particle dust, then dust removal is improved, but the air filter clogs more easily reducing cooling efficiency

Engineering Contradiction:

Improvesmall particle dust removalVSAvoidcooling efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The cooling air flow is made continuous and unobstructured by removing the air filter. Air flows continuously through the openings in the dust-proof walls without being blocked by filter media, maintaining constant cooling efficiency without periodic interruptions for filter maintenance.

Inventive Principle:

Principle #20Continuity of useful action

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 effectively prevents dust from reaching optical components, maintains high cooling efficiency, and reduces noise, thereby enhancing display quality and extending component lifespan without the need for an air filter.

Implementation Method 1

suction areas configured to suck cooling air in a direction along one wall of the dust-proof structure from one surface of the case to cool the optical components

Methodology Applied

Scientific EffectForced Convection: Forced Convection

Implementation Method 2

dust-proof structure having a plurality of walls surrounding a plurality of optical components to prevent the incursion of dust

Methodology Applied

Scientific EffectPhysical Containment: Physical Containment

Data Source

PatentUS9022574B2Display device

Publication Date: 2015.05.05 SHARP NEC DISPLAY SOLUTIONS LTD

AI summary

Provided is a projection type display device that has dust-proof and coolable optical components. According to an aspect of the present invention, the display device includes a case, a dust-proof structure that has a plurality of walls surrounding a plurality of optical components to prevent dust, and which is located in the case, and suction ports (7b and 7b′) formed in the case and configured to suck cooling air along one wall of the dust-proof structure to cool the optical components. The suction ports are separated into first suction port (7b) and second suction port (7b′) with a position of one wall set as a reference. First suction port (7b) is located to blow the cooling air to the dust-proof structure, while second suction port (7b′) is located to prevent direct blowing of the cooling air to the dust-proof structure. An area of first suction port (7b) is smaller than that of second suction port (7b′).