Inverter Circuit Structure for TFT Display Area Reduction
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Solution Overview
Problem
Inverter circuits used in Thin Film Transistor (TFT) designs have a complex structure and large footprint, which complicates their implementation in display technologies.
Innovation Solution
An inverter circuit comprising a switching transistor and a voltage dividing resistor, where the switch transistor has specific on-state and off-state resistances relative to the resistor, allowing for signal inversion with reduced area and cost, and a driving method that controls the transistor to invert signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional inverter circuit structure is used in TFT design, then signal inversion function is achieved, but the circuit occupies large area and has complex structure
Solution Approach 1:
The patent merges the inverter function with a switching transistor and voltage dividing resistor structure. The switching transistor's gate is connected to the input signal, source to first reference signal terminal, and drain to output terminal. The voltage dividing resistor connects between drain and second reference signal terminal. This integration achieves signal inversion while reducing the number of discrete components and overall circuit footprint.
Solution Approach 2:
The switching transistor serves multiple functions: it acts as the primary switching element for signal inversion, provides voltage control through its gate, and works in conjunction with the voltage dividing resistor to establish proper voltage levels. This multi-functionality reduces the need for separate dedicated components, simplifying the overall circuit structure.
2Productivity
If conventional inverter circuits are used, then signal inversion is achieved, but the number of driving signals required is large
Solution Approach 1:
The patent extracts and utilizes reference signal terminals (first and second reference signal terminals) as stable voltage sources. By connecting the switching transistor source to the first reference signal terminal and the voltage dividing resistor to the second reference signal terminal, the circuit leverages these external references to establish proper operating levels, reducing the need for additional dedicated driving signals within the inverter itself.
3Ease of manufacture
If conventional inverter circuits are used, then signal inversion function is provided, but manufacturing cost is high
Solution Approach 1:
The patent combines the inverter functionality with a minimal set of components: one switching transistor and one voltage dividing resistor. This merged structure reduces the total component count compared to conventional inverters, directly lowering manufacturing costs through fewer components to fabricate, test, and assemble.
Solution Approach 2:
The patent specifies particular resistance relationships between the switching transistor and voltage dividing resistor to optimize performance. The on-state resistance of the switching transistor should be 1/10 to 1/5 of the voltage dividing resistor resistance, and the off-state resistance should be 10 to 50 times the voltage dividing resistor resistance. These parameter specifications enable reliable signal inversion while using standard component values, simplifying manufacturing.
Data Source
AI summary
Various embodiments of the present disclosure provide an inverter circuit, a driving method, an array substrate, a detecting method, and a display apparatus, which may enable a simple structure by incorporating a switch transistor with a resistor. The simple structure is configured to make the levels of a signal at an outputting terminal of the inverter circuit and a signal at an inputting terminal of the inverter circuit being opposite.