Vehicle Display Cover with Protrusions for Dust and Fog Prevention
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Solution Overview
Problem
Display devices in vehicles face challenges in preventing dust and fogging issues due to the need for costly dustproof sheets and potential damage from cover deformation, which complicates assembly and affects the display screen's visibility.
Innovation Solution
A display device design featuring a transparent cover with ventilation openings and protruding portions on the casing to create a complex airflow path between the display panel and the external space, eliminating the need for a separate dustproof sheet and ensuring effective anti-fogging without hermetic sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a frame-shaped dustproof sheet is attached to the cover using double-sided adhesive tape, then dust entry is prevented, but component costs significantly increase and assembly efficiency decreases
Solution Approach 1:
The invention extracts and eliminates the dustproof sheet and adhesive tape components by integrating the dustproof function directly into the cover structure through molded protrusions. This removes unnecessary components and simplifies assembly while maintaining dust prevention capability.
Solution Approach 2:
The dustproof function is merged with the cover structure by forming protrusions directly on the cover that serve both as structural support and dust barriers. This integration eliminates the need for separate dustproof sheets and adhesive tapes.
2Object-affected harmful factors
If the space between the cover and display panel is hermetically sealed, then dust entry is prevented, but water vapor condenses on the cover and display screen causing fogging
Solution Approach 1:
The invention uses breathable protrusions formed on the cover that allow air and water vapor passage while blocking dust particles. These protrusions act as porous structures that permit vapor transmission for condensation prevention while maintaining dust barrier functionality.
Solution Approach 2:
The protrusions serve as intermediary structures between the sealed space and external environment, allowing selective passage of substances. They mediate between dust prevention requirements and vapor transmission needs for fogging prevention.
3Strength
If a large space is secured between the cover and display screen, then cover deformation damage is prevented, but the space becomes more susceptible to dust entry and condensation
Solution Approach 1:
The invention applies local quality by creating protrusions at specific locations on the cover that provide targeted dust barrier functionality. This allows the space to remain open for deformation prevention while localized protrusions prevent dust entry and manage vapor condensation.
4Object-generated harmful factors
If ventilation openings are formed in the cover, then condensation is reduced, but dust can enter through the openings
Solution Approach 1:
The protrusions function as porous structures that allow vapor passage for condensation prevention while their geometry blocks dust particles. This enables ventilation functionality without compromising dust protection.
Solution Approach 2:
The cover structure combines ventilation functionality with dust barrier properties through the integrated protrusion design, creating a composite structure that performs multiple functions simultaneously - allowing air flow while blocking dust particles.
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 configuration effectively prevents dust entry and reduces fogging, while maintaining a sufficient space to prevent display panel damage, enhancing assembly efficiency and reducing costs by eliminating the need for additional components.
Implementation Method 1
a ventilation opening that is in communication with an external space is formed in a portion of the casing except for a front surface of the casing
Implementation Method 2
a plurality of protruding portions each of which partially supports an outer edge portion of the front surface of the display panel are formed on an inner surface of a front wall of the casing
Data Source
AI summary
In a display device to be mounted in a vehicle, a space is secured between a cover with which a first opening of a case main body is sealed and a liquid crystal panel of a display unit mounted on the backside of the case main body, ventilation openings (spaces around protrusions and through holes) that communicate with an external space are formed in portions of a casing, which is a component member of the display unit, except for the front surface of the casing, and protruding portions each partially supporting the outer edge portion of the front surface of the liquid crystal panel are formed on the inner surface of the front wall of the casing. Thus, a long and complicated air flow path is secured around the liquid crystal panel by the protruding portions, and the space and the external space communicates with each other via the path.