Touch Screen Panel Dual-Surface Electrode Layout
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Solution Overview
Problem
Capacitive-type touch screen panels face challenges in manufacturing high-definition and large-area screens due to increased dead space caused by forming all sensing electrodes and outside wirings on one surface of the film substrate, which limits their ability to reduce the black matrix region effectively.
Innovation Solution
The solution involves forming sensing electrodes and outside wirings on separate groups on different surfaces of either two sheets or a single substrate, reducing the dead space by half while maintaining the interval between the outside wirings, allowing for a lighter and slimmer touch screen panel with improved definition and larger display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If all sensing electrodes and outside wirings are formed on one surface of the film substrate, then the manufacturing process is simple, but the dead space region increases reducing the display area
Solution Approach 1:
The patent divides the sensing electrodes into two separate groups: first sensing electrodes formed on the first surface of the film substrate and second sensing electrodes formed on the second surface. This segmentation allows outside wirings to be arranged more efficiently, reducing the dead space region by approximately half compared to conventional single-surface designs, thereby increasing the display area while maintaining manufacturing feasibility
Solution Approach 2:
The patent transitions from a two-dimensional arrangement (all electrodes on one surface) to a three-dimensional arrangement (electrodes distributed on both surfaces of the film substrate). By utilizing the vertical dimension through dual-surface electrode formation, the design reduces the horizontal dead space required for outside wirings, effectively increasing the display area without complicating the manufacturing process
2Device complexity
If all sensing electrodes and outside wirings are formed on one surface of the film substrate, then the structure is simple, but the black matrix region increases reducing the definition
Solution Approach 1:
By segmenting the sensing electrodes into two groups on opposite surfaces of the film substrate, the patent reduces the width of the black matrix region required to separate outside wirings. This segmentation allows for narrower black matrix regions, thereby improving the definition and visual quality of the display while maintaining structural simplicity through the use of standard film substrate materials and processes
3Ease of manufacture
If all sensing electrodes and outside wirings are formed on one surface of the film substrate, then the manufacturing process is straightforward, but the touch screen panel cannot be made large area
Solution Approach 1:
The patent utilizes the third dimension (vertical arrangement on both surfaces of the film substrate) to accommodate sensing electrodes and outside wirings. This dimensional transition allows for more efficient space utilization, enabling the manufacturing of large-area touch screen panels while maintaining a straightforward manufacturing process that builds upon conventional film substrate fabrication techniques
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 effectively minimizes the dead space region, enabling the production of high-definition and large-area capacitive-type touch screen panels with reduced black matrix areas, enhancing the panel's slimness and display capabilities.
Implementation Method 1
when the human body or the object touches the touch screen panel, the conductive sensing electrode senses the change in capacitance generated by adjacent sensing patterns or ground electrode, etc., thereby converting touched positions into the electrical signals
Data Source
AI summary
A touch screen panel according to an exemplary embodiment of the present invention includes: first and second substrates each being divided into a touch active region and a touch non-active region that is located outside the touch active region; second sensing electrodes at the touch active region on a first surface of the first substrate; first sensing electrodes divided into at least two groups respectively at the touch active regions on different surfaces of the first and second substrates, a group of the at least two groups being on a second surface of the first substrate or at least one surface of the second substrate; and outside wirings connected to the first and second sensing electrodes, the outside wirings and the sensing electrodes on a same one of the substrates being at a same plane.