GOA Circuit Eliminates D2U U2D Signals for Narrow Border Design
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Solution Overview
Problem
The existing gate driver on array (GOA) circuit requires both D2U and U2D control signals for forward and backward scanning, which restricts IC choices, increases costs, and complicates narrow border design due to layout constraints.
Innovation Solution
A GOA circuit design that eliminates the need for D2U and U2D control signals by using a cascade of thin film transistors and capacitors, with clock signals having a duty ratio of 0.25 and differing waveforms, allowing for forward and backward scanning without these control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2U and U2D control signals are added to achieve forward and backward scanning function, then the scanning function is improved, but the device complexity and IC cost increase
Solution Approach 1:
The patent extracts and eliminates the D2U and U2D control signals from the circuit, achieving forward and backward scanning functionality through a simplified circuit architecture that uses only clock signals and basic transistor switches, thereby reducing device complexity while maintaining scanning adaptability
Solution Approach 2:
The patent makes the clock signal CKV1 serve multiple functions by using it to control both forward scanning (through transistor T2) and backward scanning (through transistor T6), eliminating the need for separate D2U and U2D control signals and reducing overall circuit complexity
2Adaptability or versatility
If D2U and U2D control signals are added to achieve forward and backward scanning function, then the scanning function is improved, but the IC cost increases
Solution Approach 1:
The patent removes the requirement for D2U and U2D control signals, simplifying the IC design and manufacturing process, which directly reduces IC cost while preserving the essential forward and backward scanning functions through alternative circuit mechanisms
Solution Approach 2:
The patent replaces expensive dedicated control signal generation circuits with simpler, more cost-effective transistor switches (T2 and T6) that can be easily manufactured using standard thin-film transistor processes, reducing IC manufacturing costs
3Adaptability or versatility
If D2U and U2D control signals are added to achieve forward and backward scanning function, then the scanning function is improved, but the layout restrictions for narrow border design increase
Solution Approach 1:
The patent extracts and eliminates the D2U and U2D control signals and their associated circuitry, freeing up layout space that can be used to reduce border area and enable narrow border display designs while maintaining full scanning functionality
Solution Approach 2:
The patent merges the control functions of D2U and U2D signals into the existing clock signal CKV1 and transistor switch network, consolidating control logic and reducing the space required for control signal routing and processing, thereby facilitating narrow border design
Data Source
AI summary
The invention provides a GOA circuit, comprising a plurality of GOA units, for a positive integer n, n-th GOA unit comprising: a first TFT (T1), a second TFT (T2), a third TFT (T3), a fourth TFT T(4), a fifth TFT (T5), a sixth TFT (T6), a seventh TFT (T7), an eighth TFT (T8), a ninth TFT (T9), a tenth TFT (T10), a first capacitor (C1) and a second capacitor (T2). The invention, based on known GOA circuit, uses T9 and T10 so as to achieve forward and backward scanning without D2U and U2D control signals, which facilitates narrow border design and simplifies corresponding driving timing and reduce IC cost.