Touch Display Device with Non-Display Area Electrode Routing
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Solution Overview
Problem
Existing touch display panels face challenges in achieving a high aperture ratio and reducing manufacturing costs due to the use of jumper wire connection structures, which increase the number of masks required and reduce the pixel penetration area.
Innovation Solution
The touch display device features a touch electrode layer with sensing electrodes extending from the display area to the non-display area, connected to a driver chip via a connection structure in the non-display area, eliminating the need for jumper wire connections and incorporating multiplexers to reduce the number of routings to the driver chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a jumper wire connection structure with VIA is used to implement connections among sensing components, then the connections are established, but the aperture ratio of the panel is decreased due to additional routing area requirements
Solution Approach 1:
The connection structure is extracted from the display area and relocated to the non-display area. The sensing electrodes extend directly to the non-display area where they connect to the driver chip, eliminating the need for jumper wires and VIAs within the display area, thereby increasing the aperture ratio while maintaining connection reliability.
Solution Approach 2:
The connection path is extended from the two-dimensional display area into the third spatial dimension by utilizing the non-display area border region. This dimensional transition allows connections to be established without occupying pixel penetration area, resolving the contradiction between connection needs and aperture ratio.
2Reliability
If a jumper wire connection structure is used to connect sensing components to the driver chip, then connections are established, but the number of masks increases and manufacturing cost increases
Solution Approach 1:
The complex jumper wire connection structure with multiple VIAs is extracted and removed from the manufacturing process. By extending sensing electrodes directly to the non-display area for connection, the number of photolithography masks is reduced, simplifying the manufacturing process and reducing costs while maintaining reliable electrical connections.
3Reliability
If jumper wire connection structure is used, then connections are implemented, but the area allowing pixel penetration is reduced
Solution Approach 1:
The connection functionality is extracted from the display area and relocated to the non-display area. Sensing electrodes extend directly to the border region where they connect to the driver chip, completely eliminating jumper wires and VIAs from the display area, thus maximizing pixel penetration area while preserving connection functionality.
Solution Approach 2:
The connection path transitions from the two-dimensional display area to the border region in the non-display area. This spatial reconfiguration allows pixels to penetrate the full display area without obstruction, as connections are established in the adjacent non-display region instead.
Data Source
AI summary
A touch display device includes a display area and a non-display area and further includes a touch electrode layer; wherein a plurality of sensing electrodes is configured in the electrode layer; wherein each sensing electrode extends from the display area to the non-display area and is coupled to a driver chip via a connection structure; wherein the connection structure locates in the non-display area.