Rigid LCD Assembly with Glass Plate and Thermal Plates
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Solution Overview
Problem
Traditional liquid crystal displays (LCDs) are not durable enough to withstand direct sunlight, weather, high/low ambient temperatures, and mechanical shocks, particularly when used on moving vehicles, as their thin components fail to maintain image quality over time.
Innovation Solution
A rigid LCD assembly is designed with a perimeter tape, a diffusing plate, and optical films inserted in a cavity, along with a U-shaped backlight wall and thermal plates for cooling, using high-bond adhesives and metal components for structural integrity and heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional LCDs are used with thin components, then the LCD assembly is more appealing to consumers and easier to manufacture, but it cannot withstand environmental stresses such as sunlight, weather, temperature extremes, and mechanical shocks
Solution Approach 1:
The patent employs a composite structure combining multiple materials with different properties: a rigid housing (metal or rigid plastic) for structural strength and shock resistance, optical films for image quality, adhesive layers for bonding, and protective coatings for environmental resistance. This composite approach allows the assembly to simultaneously achieve durability against environmental stresses and manufacturing feasibility
Solution Approach 2:
The LCD assembly is divided into distinct functional segments: the rigid housing structure, the LCD panel itself, optical films, adhesive layers, and protective coatings. Each segment is optimized for its specific function while contributing to overall reliability, allowing the thin LCD components to be protected within a robust segmented structure
2Adaptability or versatility
If traditional LCDs are placed on moving vehicles, then they can be used in diverse environments, but they degrade over time due to shock from potholes, curbs, speed bumps, and other vehicles
Solution Approach 1:
The rigid housing structure is designed to absorb and dissipate mechanical shocks from vehicle movement before they reach the thin LCD components. The housing acts as a pre-positioned cushioning element that protects the delicate internal components during transport and installation on moving vehicles, extending service life in mobile applications
Solution Approach 2:
The patent uses flexible adhesive layers and protective films that can accommodate mechanical stress and deformation. These flexible elements allow the assembly to withstand vibration and shock from vehicle movement while maintaining the integrity of the thin LCD components and optical films
3Shape
If thin LCD components are used, then the assembly is more appealing to consumers, but the components fail to maintain image quality over time in harsh environmental conditions
Solution Approach 1:
Different parts of the assembly have different protective qualities tailored to their specific needs: the rigid housing provides structural protection, optical films maintain image quality, adhesive layers ensure proper positioning, and protective coatings resist environmental degradation. This localized quality distribution allows thin components to maintain image quality while being protected in harsh environments
Solution Approach 2:
The combination of rigid housing, optical films, adhesives, and protective coatings creates a composite structure that preserves the thin profile of the LCD while adding layers of protection. Each material in the composite contributes specific properties that collectively maintain image quality over time despite environmental exposure
Data Source
AI summary
Exemplary embodiments disclosed herein provide a LCD assembly including an LED backlight, a liquid crystal display (LCD) placed in front of the LED backlight, a glass plate positioned between LED backlight and the LCD; and an optical film positioned between the glass plate and the LCD. In some embodiments, the glass plate is bonded to the rear side of the LCD, generally around the perimeter of the LCD. Preferred embodiments place a diffusing film within a cavity that is defined between the glass plate and the LCD. Some embodiments also bond the backlight cavity walls to the glass plate, on a side opposing the LCD.