Array Base Plate Layout for In-Cell Touch Yield Improvement
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Solution Overview
Problem
In Cell Touch technology for capacitance-type touch-controlled screens faces challenges with high production costs and low yield due to complex electrode design and imperfections in touch controlling units, leading to increased production costs and reduced product promotion.
Innovation Solution
An array base plate with a substrate and touch-controlling units featuring electrically connected sub-pixels, driving electrode lines with disconnection points, and isolating via holes filled with insulating parts, allowing for efficient signal transmission and touch control while reducing production complexity and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch controlling electrodes are disposed inside the display panel (In Cell Touch technique), then touch controlling functionality is achieved, but production cost increases and yield decreases due to complex electrode design and imperfect checkout and repairing
Solution Approach 1:
The array base plate is divided into multiple independent touch-controlling units, each comprising multiple sub-pixels. This segmentation allows for modular manufacturing and inspection, where each unit can be independently checked and repaired, thereby reducing overall system complexity while maintaining touch controlling functionality.
Solution Approach 2:
Driving electrode lines are introduced as intermediary elements that serve dual purposes: transmitting driving signals during display operation and serving as touch-controlling sensing electrodes during touch operation. This eliminates the need for separate touch electrode layers, simplifying the overall electrode design while preserving touch functionality.
2Reliability
If touch controlling electrodes are disposed inside the display panel, then touch controlling is achieved, but production cost increases due to imperfect checkout and repairing
Solution Approach 1:
The driving electrode lines perform multiple functions: they serve as signal transmission conduits during display operation and as sensing electrodes during touch operation. This multi-functionality reduces the total number of electrode layers required, simplifying manufacturing processes and reducing production costs while maintaining touch controlling capabilities.
Solution Approach 2:
By dividing the display into independent touch-controlling units with clearly defined boundaries, the patent enables modular inspection and repair processes. Defects can be localized to specific units, facilitating efficient checkout and repairing, thereby reducing production costs despite the integrated electrode design.
3Ease of manufacture
If driving electrode lines are continuous across touch-controlling units, then signal transmission is simplified, but boundary isolation between units becomes difficult to achieve
Solution Approach 1:
The patent extracts the isolation function from the electrode lines themselves by introducing separate isolating and insulating parts at unit boundaries. This allows the driving electrode lines to remain continuous for simplified signal transmission, while the extracted isolation components provide precise boundary separation between touch-controlling units.
Solution Approach 2:
Isolating and insulating parts are introduced as intermediary elements at the boundaries between touch-controlling units. These intermediaries provide the necessary electrical isolation while allowing the driving electrode lines to maintain continuity within each unit, thereby resolving the conflict between signal transmission simplicity and boundary isolation precision.
Data Source
AI summary
The present application provides an array base plate and a preparing method thereof, and a display panel. The array base plate includes a plurality of touch-controlling units that are disposed on the substrate and are arranged in an array, wherein the first electrodes of all of the sub-pixels of the touch-controlling units are electrically connected; a plurality of driving electrode lines, wherein at least part of orthographic projections of the driving electrode lines on the substrate are disposed between orthographic projections on the substrate of two neighboring rows of the first electrodes, and the driving electrode lines are electrically connected to at least one of the first electrodes; in the two neighboring rows of the first electrodes, all of the rows of the first electrodes are arranged in a direction of the driving electrode lines.