Touch Screen Bonding Pad Cover for Display Response Speed
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Solution Overview
Problem
Conventional display apparatuses with touch panel functionality face challenges in response speed when touched, as existing technologies do not effectively enhance the interaction between the touch screen layer and the sealing portion, leading to suboptimal performance in sensing patterns and bonding pad portions.
Innovation Solution
A display apparatus design featuring a touch screen layer with sensing patterns and bonding pad portions, where the pad electrode has a low resistance and is covered by an opaque cover portion made of materials like manganese, chrome, or cobalt, which absorbs light and converts it into heat to assist in sealing, improving the response speed by optimizing the connection between the substrates and enhancing the touch screen's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the bonding pad portion uses a transparent or semi-transparent structure, then the display area can be maximized, but the response speed when touched deteriorates
Solution Approach 1:
The bonding pad portion is designed with spatially varying optical properties: the pad electrode region remains transparent to maintain display area, while the cover portion is made opaque to improve response speed. This local differentiation allows each region to serve its specific function optimally.
Solution Approach 2:
The bonding pad portion is segmented into distinct functional regions: the pad electrode (for electrical connection and transparency) and the cover portion (for optical absorption and response speed improvement). This segmentation allows independent optimization of each sub-component.
2Speed
If the cover portion is made opaque to improve response speed, then the light absorption increases, but the display brightness in the bonding pad area may be affected
Solution Approach 1:
The opaque cover portion is localized only to the bonding pad area where it is needed for response speed, while the rest of the display area maintains full transparency. This localized approach prevents impact on overall display brightness.
Solution Approach 2:
The display surface is segmented into functional zones with different optical properties: the bonding pad area has opaque cover for touch response, while the display area remains transparent for light transmission. This segmentation isolates the optical impact to minimal 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
The improved design enhances the response speed of the touch screen by ensuring efficient thermal transfer and bonding, effectively sealing the display area and improving the touch panel's performance, thereby addressing the limitations of conventional designs.
Implementation Method 1
The cover portion may be opaque and may overlap the sealing portion. The cover portion may convert absorbed light into heat.
Implementation Method 2
The cover portion may perform a black-body radiation.
Data Source
AI summary
A display apparatus includes a first substrate on which a display area is defined; a second substrate facing the first substrate and including a touch screen layer on a surface thereof; and a sealing portion between the first substrate and the second substrate, and bonding the first substrate and the second substrate to each other. The sealing portion is formed around the display area, and the touch screen layer includes a plurality of sensing patterns and a plurality of bonding pad portions electrically connected to the plurality of sensing patterns. Each of the bonding pad portions includes a pad electrode electrically connected to the plurality of sensing patterns and a cover portion surrounding a part of the pad electrode, and the cover portion is opaque and is formed to overlap the sealing portion.