GOA Circuit Merging for Narrow Bezel and Power Reduction
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Solution Overview
Problem
Current oxide semiconductor gate driver on array (IGZO-GOA) circuits are complex, leading to increased layout area and power consumption as panel size and the number of gate drive lines increase, which hinders the achievement of a narrow frame design and higher power efficiency in display devices.
Innovation Solution
A cascaded multi-stage GOA circuit sharing unit is designed, incorporating feedback, pull-up, and pull-down modules with thin film transistors, allowing for sharing of single-stage GOA circuits every two stages, reducing the number of transistors and wiring, and optimizing node connections to minimize space and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional GOA circuit design is used, then complete gate drive functionality is achieved, but layout area increases and power consumption rises
Solution Approach 1:
The patent combines the functions of two adjacent stage GOA circuits into a single shared circuit unit. The pull-up module, pull-down module, bootstrap capacitor module, and feedback module are designed to serve both stage n and stage n+1 simultaneously, reducing the total number of transistors and wiring required while maintaining complete gate drive functionality for multiple stages.
Solution Approach 2:
The shared GOA circuit unit is designed with multi-functional capability to perform gate drive operations for multiple stages. The same pull-up module generates both G(n) and G(n+1) scanning signals, and the same pull-down module maintains both stages, making the circuit universal across different stage requirements.
2Area of stationary object
If more gate drive lines are added for larger panels, then display coverage is improved, but power consumption increases
Solution Approach 1:
By merging the drive functions for multiple gate lines into shared circuit units, the patent reduces the total power consumption. Instead of having separate power-hungry circuits for each stage, the shared modules efficiently drive multiple stages with reduced redundant power usage.
3Ease of operation
If traditional external ICs are used for gate driving, then driving control is achieved, but production cost and power consumption increase
Solution Approach 1:
The patent implements self-service by integrating the gate drive functionality directly into the array substrate through TFT-based GOA circuits. The display panel drives itself without requiring external ICs, eliminating the need for separate driving components and reducing overall power consumption while maintaining driving control capability.
Data Source
AI summary
A gate driver on array (GOA) circuit is provided. The GOA circuit is designed to form a GOA sharing unit by arranging adjacent two stage GOA units in a conventional GOA circuit. Anew GOA circuit enables single-stage GOA circuit to be shared every two stages of GOA output signals. The new GOA circuit can reduce a number of thin film transistors in the GOA circuit and reduce a wiring design, which helps to reduce a design space of the GOA circuit, realizes a narrow bezel design, simplifies the GOA circuit, and can reduce power consumption of the GOA circuit.