In-cell Touch Display Static Protection via Isolated Wiring
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Solution Overview
Problem
Static electricity during the manufacturing of liquid crystal display panels can damage pixel drive elements, leading to defects and component breakdowns, and existing solutions like short-circuit wiring are inadequate as they can cause similar issues when cut.
Innovation Solution
An in-cell touch display device design where remaining short-circuit wiring, after cutting, is electrically isolated from row and column wires and connected to touch electrodes, providing electrostatic protection and preventing damage to pixel drive elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If short-circuit wiring is disposed on the active matrix substrate to electrically connect row wires and column wires together, then the pixel drive elements are protected from static electricity damage, but the device complexity increases and the short-circuit wiring may cause similar issues when cut
Solution Approach 1:
The patent extracts the harmful function of the short-circuit wiring (which can cause defects when cut) while retaining its protective function. The remaining short-circuit wiring is separated from the row and column wires, taking out only the necessary protective connection to the touch electrode, thus eliminating the risk of causing defects while maintaining static electricity protection.
Solution Approach 2:
The short-circuit wiring is segmented into two parts: one part remains connected to the touch electrode for protection, while the other part is separated from the row and column wires to avoid causing defects. This segmentation resolves the contradiction by allowing the protective function to persist while eliminating the harmful potential.
2Reliability
If short-circuit wiring is used to protect pixel drive elements, then reliability improves, but when the wiring is cut, it causes component breakdown and defects
Solution Approach 1:
The harmful connection between the short-circuit wiring and the row/column wires is extracted and removed. Only the necessary connection to the touch electrode is retained, which provides protection without creating the risk of component breakdown or defects when the wiring is cut.
Solution Approach 2:
The remaining short-circuit wiring, which could potentially cause harm if connected to row and column wires, is converted into a beneficial protective element by connecting it solely to the touch electrode. This transforms the potential harmful factor into a useful protective function against static electricity.
Data Source
AI summary
An in-cell touch display device is provided. The in-cell touch display device comprises: a first substrate including plural row wires, plural column wires and plural pixel drive elements, and the row wires and the column wires are interleaved to form a pixel matrix, and the pixel drive elements are disposed on pixels of the pixel matrix; a second substrate disposed opposite the first substrate; a display medium interposed between inner sides of the first substrate and the second substrate; plural touch electrodes disposed on the inner side of the first substrate or the second substrate; a remaining short-circuit wiring obtained after cutting, used as an antenna and is disposed outside the pixel matrix on the first substrate, electrically isolated from the row wires and the column wires, and is at a distance from the row wire or the column wire.