Touch Display Electrostatic Protection Circuit
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Solution Overview
Problem
Liquid crystal display panels face damage and defects due to static electricity generated during manufacturing, which existing short-circuit wiring fails to adequately address, leading to component breakdown and feature defects.
Innovation Solution
A touch display device with an electroconductive protection circuit electrically isolated from row and column wires but connected to touch electrodes, utilizing diodes or a switch for electrostatic protection, preventing damage from static electricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If short-circuit wiring is disposed on the active matrix substrate to electrically connect the row wires and column wires together, then the potentials of the row wires and column wires are the same and static electricity damage is prevented, but the liquid crystal display panel still encounters component breakdown and feature defects when the short-circuit wiring is cut
Solution Approach 1:
The touch electrode structure is designed to serve dual functions: it acts as both a touch sensing electrode and an electrostatic protection circuit. The touch electrode is electrically connected to the electroconductive protection circuit through the electroconductive control assembly, allowing it to provide electrostatic protection while maintaining its touch functionality, thereby eliminating the need for separate protective wiring
Solution Approach 2:
The electroconductive control assembly (comprising diodes or a switch) serves as an intermediary component that selectively connects the touch electrode to either the touch circuit or the electroconductive protection circuit. This intermediary mechanism enables the touch electrode to switch between its touch sensing function and electrostatic protection function, resolving the contradiction between functionality and protection
2Reliability
If additional protective wiring is added to protect from static electricity, then pixel drive elements are protected, but manufacturing efficiency decreases and device complexity increases
Solution Approach 1:
The touch electrode structure is designed to serve dual functions: it acts as both a touch sensing electrode and an electrostatic protection circuit. The touch electrode is electrically connected to the electroconductive protection circuit through the electroconductive control assembly, allowing it to provide electrostatic protection while maintaining its touch functionality, thereby eliminating the need for separate protective wiring
Solution Approach 2:
The invention merges the touch electrode structure with the electrostatic protection circuit into a single integrated system. By combining these two previously separate functions into one structure, the patent eliminates additional protective wiring, simplifies the manufacturing process, and improves manufacturing efficiency while maintaining reliable electrostatic protection
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
The solution effectively protects pixel drive elements from static electricity-induced damage, allowing the liquid crystal display panel to function normally while omitting the need for additional protective wiring, thus enhancing manufacturing efficiency and reducing defects.
Implementation Method 1
an electroconductive protection circuit disposed outside the pixel matrix on the first substrate, electrically isolated from the row wires and the column wires
Data Source
AI summary
A touch display device is provided. The touch display device comprises: a first substrate including plural row wires, a plurality of column wires and a plurality of 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; a plurality of touch electrodes disposed on the inner side of the first substrate or the second substrate; an electroconductive protection circuit disposed outside the pixel matrix on the first substrate, electrically isolated from the row wires and the column wires; and an electroconductive control assembly, electrically connected to the electroconductive protection circuit and the touch electrodes.