LCD Touch Sensor Mechanical Hooking Attachment
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Solution Overview
Problem
The existing methods for manufacturing liquid crystal displays (LCDs) with touch functions face challenges in securely attaching touch sensors due to the rough surface of the LCD panel, leading to issues with double-sided tapes not adhering firmly and UV adhesives potentially flowing into the backlight module, which affects display performance.
Innovation Solution
The use of hooking members on a frame to securely attach the touch sensor and LCD panel to the backlight module without the need for double-sided tapes or optical adhesive, utilizing a design with indentation and accommodation rooms to position and press the components firmly onto the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If double-sided tapes or optical adhesive are used to attach the touch sensor to the LCD panel, then the attachment method is simple, but the attachment reliability is poor due to the rough surface of the LCD panel
Solution Approach 1:
The patent replaces the chemical bonding mechanism of adhesives with a mechanical fastening system consisting of hooking members. The hooking members engage with protrusions on the LCD panel and touch sensor, providing reliable mechanical attachment that is independent of surface roughness. This substitution eliminates the dependency on adhesive quality and surface conditions, simultaneously improving both ease of manufacture and attachment reliability.
2Strength
If liquid UV adhesive is used to attach the touch sensor to the LCD panel, then the attachment strength is improved, but the adhesive may flow into the backlight module causing adverse influence on display performance
Solution Approach 1:
The patent eliminates the use of liquid UV adhesive entirely by substituting it with a mechanical hooking system. The hooking members provide sufficient attachment strength without the flow characteristics of liquid adhesives, thereby preventing adhesive from entering the backlight module and degrading display performance. This substitution resolves the contradiction by achieving strong attachment through a different physical mechanism that does not suffer from the harmful flow property.
3Strength
If opaque parts are present on the LCD panel, then the structural integrity is improved, but the UV adhesive cannot be illuminated by UV light causing incomplete hardening
Solution Approach 1:
The patent replaces the UV-cured adhesive system with a mechanical hooking system that does not depend on UV light illumination. The hooking members provide attachment strength independently of optical conditions, eliminating the problem where opaque parts block UV light and prevent complete adhesive hardening. This substitution resolves the contradiction by using a mechanical mechanism that is unaffected by the presence of opaque structural elements.
Data Source
AI summary
A liquid crystal display according to the present disclosure is provided. The liquid crystal display includes a frame, a backlight module, a plurality of hooking members, an LCD panel, and a touch sensor. According to the liquid crystal display of the present disclosure, wherein the hooking members on the frame may secure the touch sensor or the LCD panel on the backlight module without need of using double-sided tapes or optical adhesive.