Liquid Crystal Display Face Plate Adhesive Bubble Prevention
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Solution Overview
Problem
Existing liquid crystal display devices face challenges in reducing panel thickness while maintaining mechanical strength, leading to issues like image doubling due to external light refraction and difficulties in uniform adhesive lamination, which affects manufacturing yield and image quality.
Innovation Solution
A liquid crystal display device with a picture-frame-shaped light blocking film formed by printing black ink on the face plate, using an ultraviolet curing resin to adhere the face plate to the polarizer, and controlling the Si content in the ink to prevent bubble formation and enhance adhesive strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of the liquid crystal display panel is reduced by polishing, then the profile size and thickness are decreased, but the mechanical strength is weakened making the panel susceptible to breaking
Solution Approach 1:
A face plate is mounted on the screen side of the liquid crystal display panel before use, serving as a protective cushion that absorbs external mechanical forces and prevents the thin panel from breaking
2Strength
If a face plate is mounted on the liquid crystal display panel to protect it, then mechanical strength is improved, but external light refraction causes image doubling and display quality deteriorates
Solution Approach 1:
An adhesive elastic body is introduced as an intermediary layer between the face plate and the liquid crystal display panel. This intermediate layer has a refractive index matched to reduce light refraction and eliminate image doubling, while still providing mechanical protection
3Strength
If adhesive material is applied between the face plate and liquid crystal display panel, then mechanical bonding is achieved, but bubble formation and non-uniform lamination occur reducing manufacturing yield
Solution Approach 1:
The refractive index parameter of the adhesive elastic body is specifically adjusted to match that of the face plate and liquid crystal display panel. This parameter change reduces light refraction effects and enables uniform adhesive distribution, preventing bubble formation and improving lamination quality
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 bubble generation and pinhole occurrence during adhesive application, improving the mechanical strength and image quality by ensuring a stable adhesive bond between the face plate and the liquid crystal display panel, while maintaining design aesthetics.
Implementation Method 1
an ultraviolet curing resin to adhere the face plate to the polarizer
Data Source
AI summary
A liquid crystal display device which can prevent the generation of bubbles on an adhesive surface between a liquid crystal display panel and a face plate which protects the liquid crystal display panel is provided. In mounting the face plate on an upper polarizer of the liquid crystal display panel by way of an adhesive material, a picture frame is formed on a periphery of the face plate for enhancing design property. Although the picture frame is formed by printing black ink, a quantity of Si present in the black ink is set to not more than 0.7% and not less than 0.01% thus preventing the generation of bubbles attributed to defective adhesion between the face plate and the adhesive material.