Simplified GOA Circuit for Narrow Side Frame Design

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Solution Overview

Problem

Conventional GOA circuits are complex and difficult to shrink in size, leading to wider widths that hinder the development of narrower side frames in electronic devices like cell phones and TVs.

Innovation Solution

A simplified GOA driving circuit design that eliminates the need for a backward scan control module, pull-up module, and recovery module, utilizing only two clock signals and increasing the number of switch modules to allow separate charging of nodes, reducing the number of TFTs and signal lines, thereby reducing the circuit width.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the conventional GOA circuit is used, then the circuit can perform complete scan control functions, but the circuit complexity increases and the width cannot be shrunk

Engineering Contradiction:

ImproveGOA circuit complexityVSAvoidGOA circuit width

Core Design Contradiction:

Device complexityVSLength of moving object

Solution Approach 1:

The patent extracts and eliminates the backward scan control module, pull-up module, and recovery module from the conventional GOA circuit. By removing these redundant components, the circuit complexity is reduced while maintaining the essential forward scan control functionality, thereby enabling width reduction

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent makes the switch module multi-functional by enabling it to perform both node charging and signal transmission functions. This eliminates the need for separate dedicated modules, reducing the overall number of components and circuit width while maintaining complete functionality

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Length of moving object

If the number of TFTs and signal lines is reduced, then the GOA circuit width is reduced, but the circuit functionality may be compromised

Engineering Contradiction:

ImproveGOA circuit widthVSAvoidcircuit functionality

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The patent merges the functions of multiple separate modules into the switch module, which now handles both node charging and signal transmission tasks. This consolidation reduces the number of TFTs and signal lines required, narrowing the circuit width while preserving complete functionality through the multi-functional switch module

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11328640B1GOA driving circuit, display panel and display device

Publication Date: 2022.05.10 WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

AI summary

A GOA circuit, a display panel and a display device are provided. The GOA circuit includes a plurality of GOA units connected in series. The GOA unit includes a forward scan control module, a node signal control module, an output control module, a regulating module, a first pull-down module, a second pull-down module, a third pull-down module, a fourth pull-down module, and a switch module. The display device according to an embodiment only needs two clock signals for the GOA driving circuit to scan each row of gates. Furthermore, it could enormously reduce the width of GOA and realize the narrow side frame design.