Array Substrate Transparent Bridge for Adhesive Curing
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Solution Overview
Problem
Conventional array substrates in liquid crystal displays face challenges in effectively curing the adhesive frame due to light shielding by the gate, which affects the sealing process and increases costs with additional photo-mask processes for pixel and common electrode formation.
Innovation Solution
The array substrate incorporates a driving circuit with sub-TFTs connected via a transparent conductive bridge, allowing light transmission through transparent materials in the gate insulating, etching barrier, and passivation layers, and using the same layer for pixel and common electrodes to reduce the need for additional photo-masks and lower costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional gate structure is used in the driving circuit, then the TFTs can be effectively controlled, but the adhesive frame cannot be cured effectively because the gate shields the light
Solution Approach 1:
The gate is segmented into multiple gates (first gate and second gate) that are spatially separated and arranged in different directions. This segmentation allows light to pass through the gaps between gates, enabling adhesive frame curing while maintaining TFT control functionality.
Solution Approach 2:
The patent introduces a spatial dimension solution by arranging multiple gates in different directional orientations (first direction and second direction). This multi-dimensional gate arrangement creates light transmission pathways while preserving electrical control capability.
2Manufacturing precision
If additional photo-mask processes are used to form pixel and common electrodes, then the electrodes can be precisely formed, but the manufacturing cost increases
Solution Approach 1:
The transparent conductive bridge serves multiple functions: it electrically connects sub-TFTs, acts as a common electrode, and allows light transmission. This multi-functionality eliminates the need for separate common electrode formation processes and reduces photo-mask requirements.
Solution Approach 2:
The patent merges the bridge structure with the electrode function, combining the electrical connection function and the common electrode function into a single structure. This merging reduces the number of manufacturing steps and photo-masks required.
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
This design enhances the curing effect of the adhesive frame and reduces manufacturing costs by enabling effective light transmission and simplifying the process, while maintaining high resolution capabilities for displays.
Implementation Method 1
at least one of the TFTs includes a first sub-TFT and a second sub-TFT. In addition, the first sub-TFT is electrically connected to the second sub-TFT via a first bridge, and the first bridge includes a transparent conductive material
Implementation Method 2
the adhesive frame cannot be cured effectively because the gate shields the light
Data Source
AI summary
An array substrate is disclosed. The array substrate includes a display area, and a driving circuit arranged around the display area. The driving circuit includes a plurality of TFTs, and at least one of the TFTs includes a first sub-TFT and a second sub-TFT. In addition, the first sub-TFT is electrically connected to the second sub-TFT via a first bridge, and the first bridge includes a transparent conductive material.