Touch Screen Panel Sensing Lines and Sealing Material Overlap
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Solution Overview
Problem
In recently developed displays with reduced non-display regions, the formation of sensing lines in the touch screen panel can lead to increased resistance and short-circuiting due to reduced width, and the curing of sealing materials may be incomplete where sensing lines overlap, resulting in reduced adhesive force between substrates.
Innovation Solution
The sensing lines and power lines are designed to overlap the sealing material in a region excluding the corner area, where high-intensity laser curing can cause damage, and a stronger laser is used to ensure proper curing while avoiding the corner regions, thus preventing short-circuiting and maintaining adhesive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sensing lines are formed in the non-display region with reduced width to maximize display area, then display area is increased, but resistance increases and short-circuiting occurs
Solution Approach 1:
The patent extends sensing lines into the corner regions of the non-display area, utilizing the vertical dimension and angular spaces that were previously unused. This allows the sensing lines to achieve sufficient length and lower resistance without encroaching on the display area, effectively using spatial dimensions that were not considered in conventional layouts.
Solution Approach 2:
The non-display region is segmented into functional zones: standard overlapping regions for sensing lines and power lines, and excluded corner regions to prevent short-circuiting. This segmentation allows different portions of the non-display region to serve different purposes, enabling reliable electrical connections while maintaining display area.
2Area of stationary object
If sensing lines overlap with sealing material to maximize display area, then display area is increased, but adhesive force between substrates is reduced due to incomplete curing
Solution Approach 1:
The patent applies different overlapping rules to different regions of the sealing material: sensing lines may overlap with the linear first region of the sealing material, but must exclude the corner second region. This local differentiation allows maximum display area while ensuring proper curing and adhesive strength in critical corner regions.
Solution Approach 2:
The sealing material is divided into a first region (linear shape) and a second region (corner regions with bent shape). This segmentation allows the patent to permit overlapping in the first region while excluding the second region, enabling display area maximization without compromising adhesive force in critical areas.
3Manufacturing precision
If high-intensity laser is used to cure sealing material in corner regions, then curing is improved, but component damage occurs due to excessive irradiation
Solution Approach 1:
The patent extracts or removes the corner regions from the overlapping area, excluding them from where sensing lines and power lines can be formed. This eliminates the problem of excessive laser irradiation damaging components in corner regions, as these areas are deliberately left without overlapping conductive elements.
Solution Approach 2:
The patent design excludes corner regions from the overlapping area beforehand, preventing the potential damage from excessive laser irradiation before the curing process occurs. This proactive design choice avoids the harmful effect rather than trying to mitigate it during or after curing.
4Ease of manufacture
If power lines and electrodes are positioned to overlap sealing material, then manufacturing is simplified, but short-circuiting occurs in corner regions
Solution Approach 1:
The patent segments the overlapping region by defining a first region where power lines and electrodes can overlap the sealing material, and a second corner region where they must be excluded. This segmentation maintains manufacturing simplicity in the majority area while preventing short-circuiting in critical corner regions.
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
This configuration maximizes the display area by preventing short-circuiting and ensuring adequate adhesive force between substrates, while minimizing the risk of component damage from excessive laser irradiation in corner regions.
Implementation Method 1
the curing of sealing materials may be incomplete where sensing lines overlap, resulting in reduced adhesive force between substrates
Implementation Method 2
a stronger laser is used to ensure proper curing
Data Source
AI summary
A display device with an integrated touch screen panel is disclosed. In one aspect, the display device includes an upper substrate and a lower substrate each including a display region and a non-display region. A sealing member is formed between the non-display regions of the upper and lower substrates and the sealing member includes a first region and a second region, wherein the second region is located adjacent to the corners of the substrates. An electrode is formed over substantially the entire display region of the lower substrate. A power line is formed in the non-display region of the lower substrate and a first connection electrode is formed electrically connecting the power line to an end portion of the electrode. Each of the power line, the end portion of the electrode, and the first connection electrode at least partially overlaps the first region and does not overlap the second region.