Touch Panel Inversion Reduces Thickness Without Stress Marks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch panels face challenges in reducing thickness without compromising performance, leading to issues like yellow spots, stress marks, warpage tolerance, poor fit, and low yield due to limitations in component thickness reduction.
Innovation Solution
The touch panel design involves inverting the color filter substrate and array substrate positions, with the array substrate replacing the glass cover, and optimizing the thickness and structure of polarizers and substrates to maintain performance while reducing overall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of the glass cover is reduced to decrease overall thickness, then the touch panel becomes thinner, but surface yellow spots and stress marks occur due to uneven stress
Solution Approach 1:
The patent inverts the conventional bonding sequence by first bonding the display panel to the backlight module, then bonding the glass cover to the assembled unit. This inversion allows stress to be distributed more evenly throughout the structure, preventing surface yellow spots and stress marks even when using thinner glass covers.
2Length of moving object
If the thickness of the sealant is reduced to decrease overall thickness, then the touch panel becomes thinner, but bubbles are generated during bonding process
Solution Approach 1:
The patent performs preliminary bonding of the display panel to the backlight module before attaching the glass cover. This preliminary action establishes a stable base structure, allowing for controlled application of thinner sealant without trapping bubbles, thereby maintaining manufacturing quality while reducing overall thickness.
3Length of moving object
If the thickness of the display panel is reduced to decrease overall thickness, then the touch panel becomes thinner, but broken rate of cell increases and display uniformity deteriorates
Solution Approach 1:
The patent modifies the bonding parameters and sequence, bonding the display panel to the backlight module first with optimized adhesive application. This parameter change allows for reduced display panel thickness while maintaining cell integrity and preventing display uniformity issues through controlled stress distribution.
4Length of moving object
If the thickness of the array substrate is reduced to decrease overall thickness, then the touch panel becomes thinner, but light effect is lowered and brightness is impaired
Solution Approach 1:
The patent employs composite material strategies by optimizing the adhesive layers and bonding structures between the array substrate and other components. This allows for reduced array substrate thickness while compensating for light transmission loss through the optimized composite structure, maintaining brightness performance.
Data Source
AI summary
A touch panel and a manufacturing method thereof are provided. The touch panel includes a backlight module, a first assembly, and a second assembly. The first assembly includes a first polarizer and a color filter substrate. The second assembly includes an array substrate and a second polarizer. The first polarizer, the color filter substrate, the second polarizer, and the array substrate are disposed on an upper surface of the backlight module.