Protruding LCD Screen for Dew Drainage and Corrosion Prevention
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Solution Overview
Problem
Liquid crystal displays (LCDs) face issues with the 'black-sun phenomenon' and corrosion due to temperature fluctuations, leading to impaired display quality, as dew accumulates around the periphery and creates a high-humidity environment that affects the sealant and metal circuits.
Innovation Solution
The LCD design features a casing with a frame and window where the display screen protrudes, allowing dew to drain and evaporate, and includes grooves in the frame to collect and spread dew, reducing the risk of humidity penetration and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the liquid crystal panel is sealed within the casing, then the display structure is compact and protected, but dew accumulates around the periphery creating a high-humidity environment that causes corrosion and black-sun phenomenon
Solution Approach 1:
The display screen is extracted from the sealed casing structure and extended outward, allowing dew to drain and evaporate from the peripheral region. This extraction of the display screen from the sealed environment eliminates the harmful accumulation of dew and prevents corrosion while maintaining the compact sealed structure for protection.
Solution Approach 2:
The display screen is configured to extend in the vertical dimension beyond the casing, creating a three-dimensional structure where dew can flow downward and evaporate. This dimensional change allows the system to address dew accumulation by providing an additional space for condensation and evaporation, preventing humidity penetration into the sealed panel.
2Object-affected harmful factors
If the display screen is extended out of the casing, then dew can drain and evaporate preventing corrosion, but the structural complexity increases
Solution Approach 1:
The frame structure is merged with the extended display screen, integrating the dew drainage function into the existing structural components. The frame serves both as the structural support for the display and as the conduit for dew drainage, eliminating the need for separate drainage components and reducing overall structural complexity.
Solution Approach 2:
The frame is designed with multi-functionality, serving as both the structural support for the display screen and as the dew collection and drainage system. This universal design allows a single component to address multiple functions, reducing the number of additional parts needed and minimizing the increase in structural complexity.
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 effectively prevents the formation of a high-humidity environment within the LCD, minimizing corrosion and maintaining reliable display quality even in environments with temperature fluctuations.
Implementation Method 1
allowing dew to drain and evaporate
Implementation Method 2
allowing dew to drain
Implementation Method 3
includes grooves in the frame to collect and spread dew
Data Source
AI summary
An exemplary liquid crystal display (LCD) includes a casing and a liquid crystal panel accommodated in the casing. The casing includes a frame and a window surrounded by an inner side of the frame. The liquid crystal panel includes an outside surface essentially serving as a display screen for displaying images and a peripheral wall. The liquid crystal panel is attached to the frame, with the inner side of the frame contacting the peripheral wall of the liquid crystal panel, and the display screen exposed outside of the casing.