Touch Sensor Unit Polarizer Bonding for Thinner Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices with integrated touch sensors face challenges in reducing thickness and increasing flexibility while maintaining optical characteristics and design aesthetics, particularly in the integration of touch electrodes and polarizers, which affects the bezel width and user interaction.
Innovation Solution
A display device design incorporating a touch sensor unit with a polarizer bonded to the display panel, featuring cyclic olefin polymer, non-elongation polycarbonate, or triacetyl cellulose films, and a circular polarizer, along with a touch driver connected through compressor holes, and a layout of first and second touch electrodes that form mutual sensing capacitors, reducing thickness and enhancing flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a touch sensor unit with polarizer is integrated on the display panel, then optical characteristics and design aesthetics are maintained, but the device thickness increases and flexibility decreases
Solution Approach 1:
The patent combines the touch sensor unit and polarizer into a single integrated structure mounted on the display panel. The polarizer is positioned in direct contact with the touch sensor unit, eliminating the need for separate mounting structures and reducing overall thickness while maintaining optical performance.
Solution Approach 2:
The patent employs thin film structures for the polarizer and touch sensor unit, allowing the assembly to maintain flexibility. The use of flexible substrates and thin optical layers enables the integrated unit to bend without breaking, preserving both optical characteristics and device flexibility.
2Adaptability or versatility
If touch electrodes and polarizer are integrated, then design freedom and user interaction are enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent divides the touch sensor unit into distinct electrode patterns (first and second touch electrodes arranged in different directions) that can be manufactured separately and then integrated with the polarizer. This segmentation allows for simplified manufacturing of individual components while achieving complex integrated functionality.
Solution Approach 2:
The integrated touch sensor unit serves multiple functions: touch sensing in two directions (through orthogonal electrode arrangements), optical polarization, and display protection. This multi-functionality reduces the need for separate components, simplifying the overall manufacturing process despite the enhanced design capabilities.
3Length of stationary object
If the polarizer edge is aligned with the touch sensor unit edge inside the display panel edge, then bezel width is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent positions the polarizer and touch sensor unit edges within the display panel edges, creating a nested arrangement where the integrated unit is contained within the panel boundary. This nesting allows for reduced bezel width while providing a tolerance buffer that reduces the stringency of edge alignment requirements during manufacturing.
Data Source
AI summary
A display device includes a display panel including a plurality of pixels, a touch sensor unit provided on the display panel, and including a touch sensing area in which a touch sensor is provided and a non-sensing area around the touch sensing area, and a polarizer provided on the touch sensor unit and bonded to the touch sensor unit, an edge side of the polarizer and an edge side of the touch sensor unit being aligned.