Display Substrate Driving Circuit Topology Without Storage Capacitors
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Solution Overview
Problem
Current display technologies lack effective driving circuitry with excellent driving capability and optimized layout space, particularly for all-oxide pixel driving applications.
Innovation Solution
A display substrate with a driving circuitry comprising a first node control circuitry, a second node control circuitry, and an output circuitry, where transistors are arranged to minimize space and facilitate efficient signal control, utilizing n-type transistors and a specific layout to reduce bezel width and optimize layout space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional driving circuitry is used, then the circuit can drive display pixels, but the circuit complexity increases and layout space is not optimized
Solution Approach 1:
The driving circuitry is segmented into distinct functional modules: first node control circuitry (controlling node N1), second node control circuitry (controlling nodes N2 and N3), and output circuitry. Each module independently controls specific nodes, reducing overall circuit complexity while maintaining driving capability through modular design.
Solution Approach 2:
Capacitor elements are extracted and eliminated from the circuit design. The patent achieves all-oxide pixel driving without requiring traditional capacitor components, simplifying the circuit structure and reducing layout space while preserving the essential charge storage function through alternative circuit topologies.
2Reliability
If more capacitors are added to improve driving capability, then the driving performance improves, but the layout space increases
Solution Approach 1:
Capacitor elements are completely extracted from the driving circuitry. The patent achieves effective pixel driving without traditional capacitor components by using alternative circuit topologies that maintain charge storage and release functionality through transistor-based control mechanisms, thereby reducing layout space.
Solution Approach 2:
The control circuitry performs multiple functions simultaneously: node potential control, charge storage, and pixel driving. The first and second node control circuitries collectively provide both control and storage functions that traditionally required separate dedicated capacitor elements, enabling multi-functionality within a compact layout.
3Area of stationary object
If the circuit is simplified to reduce layout space, then the layout space is optimized, but the driving capability may be compromised
Solution Approach 1:
The circuit is segmented into specialized control modules that independently manage different nodes. This segmentation allows each module to be optimized for its specific function, maintaining driving capability while reducing overall layout space through efficient modular arrangement rather than requiring large integrated capacitor structures.
Solution Approach 2:
The patent changes the fundamental parameters of the circuit design by eliminating capacitor elements and using transistor-based control mechanisms. This parameter change enables the circuit to achieve comparable driving capability with significantly reduced layout space by operating through different physical mechanisms than traditional designs.
4Reliability
If traditional driving circuitry with capacitor elements is used, then the driving function is reliable, but the number of components increases
Solution Approach 1:
Capacitor elements are extracted and removed from the component list. The patent maintains reliable driving function by replacing capacitor-based charge storage with transistor-based control mechanisms, reducing the total number of components while preserving essential functionality through alternative implementation approaches.
Solution Approach 2:
The control circuitry is designed to perform multiple functions with fewer components. The first and second node control circuitries collectively provide control, charge storage, and timing functions that traditionally required separate dedicated components, achieving multi-functionality that reduces overall device complexity.
Data Source
AI summary
A display substrate includes a driving circuitry, and the driving circuitry includes a first node control circuitry, a second node control circuitry and an output circuitry. The output circuitry is configured to control a driving signal output end to be electrically coupled to a second voltage line under the control of a potential at a first node, and control the driving signal output end to be electrically coupled to a first voltage line under the control of a potential at a second node. Transistors of the output circuitry are arranged at a side of the second voltage line away from a display region, and transistors of the first node control circuitry and transistors of the second node control circuitry are arranged at a side of the transistors of the output circuitry away from the second voltage line.