Touch Substrate Same-Side Wiring for Narrow Frame Design
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Solution Overview
Problem
Conventional One Glass Solution (OGS) touch screens face challenges in achieving a narrow frame design to maximize the display area, as the frame width needs to be minimized for aesthetic and usability purposes while maintaining precise touch functionality.
Innovation Solution
A touch substrate design featuring a first and second electrode layer with sensing electrodes connected via connection wires that are led out from the same side, utilizing a transparent conductive material and signal shielding layer to minimize frame width and prevent signal interference, allowing for a non-frame or narrow-frame design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the frame width is reduced to achieve a larger display area, then the display region increases, but the touch functionality becomes difficult to maintain
Solution Approach 1:
The patent transitions from a planar frame structure to a three-dimensional configuration by routing connection wires through the interior space of the touch substrate. The wires are led from the same side of the substrate, utilizing the Z-dimension (thickness direction) to bypass the frame width limitation, thereby maintaining touch functionality while maximizing display area.
Solution Approach 2:
The connection wires are nested within the touch substrate structure itself, passing through the interior space rather than occupying external frame space. This nesting approach allows the wiring to be integrated into the substrate's thickness dimension, enabling narrow-frame design while preserving touch functionality.
2Reliability
If connection wires are routed through the frame region, then touch signals can be transmitted, but the frame width increases reducing the display area
Solution Approach 1:
Instead of routing connection wires horizontally through the frame region (X-Y plane), the patent routes wires vertically through the substrate thickness (Z-dimension) and exits from the same side. This dimensional change eliminates the need for horizontal frame space, maximizing display area while maintaining signal transmission.
Solution Approach 2:
The touch substrate itself acts as an intermediary structure that provides an internal pathway for connection wires. By utilizing the substrate's interior space as a mediator, the wires can transmit signals without requiring external frame space, thus increasing display area.
3Ease of manufacture
If multiple connection wires are led out from different sides of the touch substrate, then signal transmission is simplified, but the frame width must be increased
Solution Approach 1:
The patent merges multiple wire exit points into a single location by routing all connection wires to exit from the same side of the touch substrate. This consolidation eliminates the need for multiple frame openings at different sides, reducing frame width requirements while maintaining signal transmission capability.
Solution Approach 2:
Instead of distributing wire exits across different sides (horizontal distribution in X-Y plane), the patent concentrates all exits at one side by utilizing vertical routing through the substrate thickness (Z-dimension). This dimensional approach allows simplified signal transmission without increasing frame width.
Data Source
AI summary
A touch substrate is provided, comprising a touch region. The touch region includes a first electrode layer and a second electrode layer which are provided on a base substrate (1) and are insulated from each other; the first electrode layer includes a plurality of sensing electrodes (4) provided along rows and columns and a first connection portion (8); the second electrode layer includes a second connection portion (2); adjacent sensing electrodes (4) in a same row are connected with each other by the first connection portion (8); adjacent sensing electrodes (4) in a same column are connected with each other by the second connection portion (2); the first connection portion (8) and the second connection portion (2) cross with each other and insulate from each other; a side of the first electrode layer away from the second electrode layer is provided with connection wires (7) connected with the sensing electrodes (4), and the connection wires (7) are configured to transmit a touch drive signal or a touch detection signal; and the connection wires (7) are led out from a same side of the touch substrate. A fabrication method of the touch substrate and a display apparatus are provided to realize a non-frame or narrow-frame design.