Touch Display Device Source Line Merging
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Solution Overview
Problem
Existing touch display devices require additional processes and increased production costs due to the need for separate metallic layers and touch driving lines, which complicate the fabrication process and elevate costs.
Innovation Solution
A touch display device design that utilizes an array substrate with touch driving electrodes, where sub-pixels are driven in a time division manner by two gate lines, allowing source lines to function as both data and touch driving lines, eliminating the need for separate touch driving lines and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate metallic layers and touch driving lines are added to existing touch screens, then touch functionality is achieved, but production cost and process complexity increase
Solution Approach 1:
The patent combines touch driving lines and data lines into a single shared line structure. The same conductive line serves dual purposes: transmitting data signals to pixel electrodes and serving as touch driving lines for capacitive touch sensing, thereby eliminating the need for separate metallic layers dedicated to touch functionality
Solution Approach 2:
The source lines are designed to perform multiple functions simultaneously. They act as data lines for pixel driving, touch driving lines for touch sensing, and share the same physical structure and conductive material, making the system more universal and reducing overall complexity
2Reliability
If separate metallic layers and touch driving lines are added to existing touch screens, then touch functionality is achieved, but production cost increases
Solution Approach 1:
The patent merges touch driving lines and data lines into a single structure, eliminating the need for additional metallic layers and associated fabrication processes such as separate sputtering, etching, and patterning steps, thereby reducing production cost
Solution Approach 2:
By making the source lines universal (serving both as data lines and touch driving lines), the patent reduces material consumption and manufacturing steps, directly lowering production cost while maintaining both display and touch functions
3Reliability
If separate metallic layers and touch driving lines are added to existing touch screens, then touch functionality is achieved, but productivity decreases
Solution Approach 1:
The patent combines touch and display signal transmission into a single line structure, reducing the number of fabrication steps (deposition, etching, patterning) and improving manufacturing efficiency and productivity
Solution Approach 2:
The multi-functional source lines reduce the overall number of components and assembly steps required, streamlining the manufacturing process and enhancing productivity
Data Source
AI summary
A touch display device is provided. The device includes an array substrate and a color substrate opposite to the array substrate; the array substrate is provided with a plurality of touch driving electrodes; a plurality of sub-pixels defined by a plurality of source lines and a plurality of gate lines insulated from and intersected with the plurality of source lines. Sub-pixels of each row are driven in a time division manner by corresponding two of the plurality of gate lines. The plurality of source lines include data lines and touch driving lines. Adjacent two sub-pixels, connected to a same data line, in a same row are connected to two different gate lines. Adjacent two sub-pixels, connected to a same gate line, in a same row are connected to two different data lines.