Backlight Frame Roughening for Display Newton's Rings
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Solution Overview
Problem
The phenomenon of Newton's rings on display screens is caused by structural bending or unevenness between films and glass substrates, leading to abnormal adsorption and affecting optical quality, with conventional methods increasing production costs.
Innovation Solution
A display panel manufacturing method involving electric discharge machining treatment on the bonding surface of a backlight module to improve securing force, reducing the release force of the protective film, and extending the bonding time to increase adhering strength between the film and the frame, thereby preventing Newton's rings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If films and glass substrates closely contact each other, then structural bending or unevenness occurs, but maintaining a gap between films increases production costs
Solution Approach 1:
The bonding surface of the frame is treated with electric discharge machining to create a locally roughened surface with specific roughness (Ra 0.5-2.0μm), while the rest of the structure maintains close contact between components. This localized surface modification improves flatness without requiring gaps throughout the entire structure, avoiding increased production costs.
Solution Approach 2:
The patent replaces mechanical contact control (maintaining gaps) with an electric discharge machining process to create a micro-roughened bonding surface. This substitution allows close contact between components while preventing abnormal adsorption through controlled surface morphology, eliminating the need for cost-increasing gap maintenance.
2Productivity
If the protective film is peeled off quickly, then production efficiency is maintained, but the film and adhesive layer detach and arch, causing Newton's rings
Solution Approach 1:
The frame bonding surface is pre-treated with electric discharge machining to create a roughened surface before the protective film is peeled off. This preliminary action ensures that when the protective film is removed at normal speed, the film and adhesive layer remain securely bonded to the frame, preventing detachment and arching that would cause Newton's rings.
Solution Approach 2:
The electric discharge machining treatment creates a micro-roughened surface that acts as a cushioning mechanism, providing enhanced mechanical interlocking between the frame, adhesive layer, and film. This beforehand preparation prevents the harmful effect of film detachment during protective film removal, allowing normal peeling speeds without compromising flatness.
3Strength
If the bonding time is extended, then adhering strength increases, but production time increases
Solution Approach 1:
The patent changes the surface morphology parameter of the frame bonding surface through electric discharge machining, creating a roughened surface with controlled roughness (Ra 0.5-2.0μm). This parameter change increases the surface area and mechanical interlocking, thereby enhancing adhering strength without requiring extended bonding time, thus maintaining production efficiency.
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 method significantly reduces the partial adsorption of the film on the lower polarizer, decreasing the occurrence of Newton's rings from 23% to 0, thereby enhancing the optical quality of the display panel.
Implementation Method 1
conducting a roughening treatment to the bonding surface of a frame of a backlight module... The roughening treatment uses an electric discharge machining treatment
Implementation Method 2
bonding the film to the frame of the backlight module with an extended bonding time in a bonding process in order to increase the adhering strength between the film and the bonding surface of the frame
Data Source
AI summary
A display panel manufacturing method for solving the phenomenon of Newton's rings on a display screen is provided, including: conducting a roughening treatment to a bonding surface of a frame of a backlight module in order to improve a securing force of the frame to an adhesive layer and a film thereon; reducing a release force of a protective film from the film above the backlight module in order to reduce a pulling force to the film below the protective film and the adhesive layer below the film when peeling off the protective film from the film; and bonding the film to the frame of the backlight module with an extended bonding time in a bonding process in order to increase adhering strength between the film and the bonding surface of the frame of the backlight module.