Touch Display Device Routing Area Elimination
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Solution Overview
Problem
Capacitive touch panels face reduced touch accuracy and increased bezel size due to the need for routing areas for connecting driving and sensing electrodes, which occupy non-display space and hinder the development of narrow bezel designs.
Innovation Solution
The touch display device eliminates the routing area by integrating driving and sensing electrodes within the touch area, using bridge lines to connect electrodes and extend routing lines from the touch area to the non-display area, thereby reducing the bezel size and improving touch accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If routing lines are formed in the non-display area to connect driving and sensing electrodes, then the electrodes can be properly connected, but the bezel size increases and touch accuracy deteriorates
Solution Approach 1:
The patent moves the routing lines from the traditional non-display area (2D plane outside touch area) into the touch area itself, utilizing the third dimension of spatial arrangement by integrating routing paths within the electrode structure. This dimensional repositioning eliminates the need for separate bezel routing areas while maintaining electrical connections.
Solution Approach 2:
The patent merges the routing function with the touch sensing area by integrating routing lines within the touch area boundaries. Instead of separating routing functions into a dedicated non-display zone, the design combines both routing and touch sensing functions within the same spatial region, thereby eliminating the bezel routing area requirement.
2Area of moving object
If routing area is disposed in non-display area, then electrode connections are established, but touch area is reduced and touch accuracy deteriorates
Solution Approach 1:
The patent repositions routing lines from the external non-display area into the internal structure of the touch area, utilizing spatial reconfiguration to maintain full touch area coverage. This dimensional shift allows routing to occur within the active touch region without creating separate routing zones that would reduce touch area.
Solution Approach 2:
The patent combines routing functionality with the touch area by integrating routing lines within the touch electrode structure. This merging eliminates the need for separate routing areas that would otherwise reduce the available touch area, while maintaining both routing and touch sensing capabilities within the same region.
3Length of moving object
If routing lines are extended from touch area to non-display area, then electrode connections are maintained, but the bezel cannot be narrowed
Solution Approach 1:
The patent extracts the routing function from the non-display area and relocates it entirely within the touch area. By removing the routing requirement from the bezel region, the design eliminates the constraint that prevents bezel narrowing, allowing for reduced bezel width without compromising electrode connections.
Solution Approach 2:
Instead of extending routing lines from the touch area outward to the non-display area (traditional approach), the patent inverts this arrangement by bringing routing lines inward from the edges into the touch area. This inversion allows routing to occur within the active display region, eliminating the need for wide bezels to accommodate external routing.
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 allows for a touch sensor with a narrow bezel by eliminating the need for routing areas in non-display spaces, enhancing touch accuracy and sensitivity while maintaining the structural integrity of the display.
Implementation Method 1
a plurality of driving electrodes in the touch area, the plurality of driving electrodes connected to each other through at least one bridge line to constitute a plurality of row touch driving lines
Implementation Method 2
a plurality of sensing electrodes crossing the plurality of driving electrodes in the touch area
Data Source
AI summary
A touch display device includes a touch sensor and having a touch area and a non-display area at a side of the touch area. The non-display area include a touch driving part. The touch display device includes: a plurality of driving electrodes in the touch area, the plurality of driving electrodes connected to each other through at least one bridge line to constitute a plurality of row touch driving lines; a plurality of sensing electrodes crossing the plurality of driving electrodes in the touch area; and at least one driving routing line from the at least one bridge line connecting the plurality of driving electrodes, wherein the at least one driving routing line extends from the touch area to the non-display area.