Flexible Touch Screen Bending Routing Areas to Back
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Solution Overview
Problem
Conventional touch control screens fail to achieve a full display design due to the presence of border wires, driving circuits, and sealants, which degrade the screen-to-body ratio.
Innovation Solution
A touch control screen design that minimizes border space by using a flexible substrate with bending passages and routing areas, where the routing and bonding areas are bent to the back of the substrate, reducing the visible width of the border to less than 0.1 mm and increasing the screen-to-body ratio to over 99%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional narrow border designs are used to increase screen-to-body ratio, then the screen area is increased, but the border space cannot be sufficiently reduced due to the presence of wirings, driving circuits, and sealant
Solution Approach 1:
The patent moves the routing area and bonding area from the front plane to the back plane of the flexible substrate by bending them along bending passages. This dimensional transition allows the border width on the front to be reduced to less than 0.1mm while still accommodating all necessary wirings and circuits on the back, effectively resolving the contradiction between increasing screen area and minimizing border width.
Solution Approach 2:
The patent employs a flexible substrate that can be bent and folded, allowing the routing and bonding areas to be positioned on the back of the display. This flexibility enables the front border to be extremely thin while maintaining functional requirements, directly addressing the limitation of conventional rigid border designs.
2Area of stationary object
If the border space is reduced to achieve full display design, then the screen-to-body ratio is increased, but the routing and bonding areas must be relocated to avoid occupying front space
Solution Approach 1:
The flexible substrate is divided into distinct functional areas: touch control area, routing area, and bonding area. The routing and bonding areas are segmented and bent to the back along specific bending passages, allowing the front display area to be maximized while organizing the complex routing structures on the back.
Solution Approach 2:
By transitioning the routing and bonding areas from the front plane to the back plane through bending, the patent resolves the spatial conflict between display area maximization and routing area accommodation, making the overall structure manageable despite its complexity.
3Length of stationary object
If bending passages are introduced to relocate routing areas to the back, then the border width is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The bending passages are pre-designed and pre-positioned on the flexible substrate during manufacturing. By establishing the bending geometry and passage locations in advance, the patent enables precise alignment and reduces the complexity of subsequent assembly operations, thereby managing the manufacturing precision requirements.
Data Source
AI summary
A touch control screen includes a flexible substrate including a touch control area, a routing area and a bonding area, wherein a plurality of bending passages is disposed between the touch control area and the routing area; a first electrode chain and a second electrode chain are intersected with and insulated from each other and located in the touch control area; a signal wire is electrically connected to the first electrode chain or the second electrode chain at one end, and extended to the bonding area at the other end. Parts of the flexible substrate corresponding to the routing area and the bonding area are bent in respect to the bending passages to the back of the flexible substrate at positions corresponding to the touch control area.