Array Substrate Common Electrode Blocks for Touch Detection
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Solution Overview
Problem
The manufacturing of display devices with self-capacitance touch electrodes increases costs and leads to alignment deviations between pixel electrodes and color filter layers, causing undesirable phenomena like color mixing during assembly.
Innovation Solution
Incorporating a common electrode with reusable self-capacitance blocks and leading wires connected to a touch integrated circuit, which simplifies the manufacturing process and maintains alignment, eliminating the need for additional self-capacitance electrodes and preventing color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If self-capacitance electrodes are added to the array substrate, then touch detection capability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The common electrode is designed to serve dual functions: acting as a common electrode for liquid crystal control during display mode, and serving as self-capacitance touch detection electrodes during touch mode. This eliminates the need for separate touch electrodes, simplifying the manufacturing process while maintaining touch detection capability.
Solution Approach 2:
The patent merges the common electrode and self-capacitance touch electrodes into a single structure. The common electrode blocks are reused as touch detection elements, combining two previously separate components into one, thereby reducing device complexity and manufacturing steps.
2Adaptability or versatility
If additional self-capacitance electrodes are manufactured on the array substrate, then touch detection is enabled, but manufacturing cost increases
Solution Approach 1:
The common electrode performs dual roles as both a display control electrode and a touch detection electrode. By making the common electrode reusable for touch detection, the patent eliminates the need for additional touch electrode manufacturing steps, thereby reducing manufacturing cost while enabling touch detection function.
3Ease of manufacture
If alignment between pixel electrodes and color filter layer is not precise, then assembly is easier, but display quality deteriorates due to color mixing
Solution Approach 1:
The common electrode is divided into multiple common electrode blocks that correspond to different pixel regions. Each block can be independently controlled and detected, allowing for better alignment management and reducing the impact of misalignment on overall display quality.
Data Source
AI summary
Embodiments of the present disclosure relate to the field of display technologies, and particularly, to an array substrate and methods of manufacturing and driving the same. With the embodiments of the present disclosure, undesirable phenomenon, e.g. color mixing and so on is avoid in a display device having the array substrate while simplifying the manufacture process of the array substrate. The array substrate comprises a substrate, thin-film transistors, pixel electrodes and a common electrode on the substrate, a plurality of leading wires and a color filter layer; wherein the common electrode comprises a plurality of common electrode blocks reusable as self-capacitance electrodes, and each of the leading wires has one end electrically connected to one of the common electrode blocks and the other end electrically connected to a touch integrated circuit. The array substrate according to the embodiments of the present disclosure is used in the display device.