Array Substrate Driving Circuit for 17T1C and 21T1C Compatibility
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Solution Overview
Problem
The high cost associated with mask changes due to structural differences between 17T1C and 21T1C driving circuits in display technology, leading to increased product compatibility issues.
Innovation Solution
An array substrate design with a driving circuit that includes a pull-up node control circuit, first and second pull-down node control circuits, and an output circuit, featuring conductive portions connected to control voltage lines, with specific distance and connection configurations to facilitate compatibility between 17T1C and 21T1C circuits using minimal additional masks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the structure of the driving circuit is changed to switch between 17T1C and 21T1C circuits, then the driving circuit functionality is improved, but the number of masks that need to be changed increases, resulting in higher mask costs
Solution Approach 1:
The conductive portion is designed to serve multiple functions: it can be configured as a gate electrode for the first transistor in the 21T1C circuit or as a connection structure for the first control voltage line in the 17T1C circuit. This multi-functionality allows a single mask pattern to support both driving circuit configurations, eliminating the need for additional masks when switching between 17T1C and 21T1C circuits.
Solution Approach 2:
The circuit configuration is made dynamic through optional connectivity. The conductive portion can be electrically connected to either the gate of the first transistor or the first control voltage line depending on the desired driving circuit mode. This dynamic reconfigurability enables seamless switching between 17T1C and 21T1C circuits using the same mask set, resolving the contradiction between adaptability and manufacturing cost.
2Adaptability or versatility
If additional masks are used to achieve circuit compatibility, then product compatibility is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The invention merges the gate electrode structure and the control voltage line connection structure into a single conductive portion. By combining these two previously separate elements into one integrated structure, the patent achieves circuit compatibility between 17T1C and 21T1C configurations without requiring additional masks, thereby reducing manufacturing complexity while maintaining product compatibility.
3Area of stationary object
If the conductive portion is placed close to the control voltage line for compact design, then area is reduced, but electrical interference and signal integrity may deteriorate
Solution Approach 1:
The patent applies local quality by specifying that the conductive portion and control voltage line should have different material properties or structural characteristics in different regions. The conductive portion can have higher conductivity when configured as a gate electrode, while maintaining appropriate spacing or shielding when connected to the control voltage line. This localized optimization ensures signal integrity is maintained while achieving compact design.
Data Source
AI summary
An array substrate includes a driving circuit arranged on the base substrate, and the driving circuit includes a pull-up node control circuit, a first pull-down node control circuit, and an output circuit; the pull-up node control circuit controls a potential of the pull-up node; the first pull-down node control circuit controls to write a first control voltage provided by the first control voltage line into the first pull-down node; the output circuit controls the driving signal output terminal to output a driving signal under the control of the potential of the pull-up node; the array substrate also includes a first conductive portion arranged on the base substrate; the first conductive portion is electrically connected to the first control voltage line.