GOA Circuit Random Line Selection for Display Mura Compensation
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Solution Overview
Problem
The existing GOA circuit technology for display panels faces challenges in maintaining image quality due to visible mura lines caused by line-by-line mobility detection and compensation, necessitating the use of horizontal blank time for detection and compensation, which affects display performance.
Innovation Solution
A GOA circuit with a random line selection function is introduced, incorporating a pull-up control module, pull-up output module, pull-down control module, pull-down output module, pull-down maintenance module, and a random location module, which allows for random line selection and compensation during the horizontal blank period, improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If line-by-line mobility detection and compensation is carried out according to scanning order, then detection and compensation can be completed, but visible mura lines appear on display screen affecting image quality
Solution Approach 1:
The patent implements dynamic random line selection instead of fixed sequential line-by-line detection. The random location module selects detection lines dynamically based on horizontal blank period timing, allowing the detection process to adapt to display timing requirements and avoid fixed-pattern artifacts.
Solution Approach 2:
The patent performs mobility detection and compensation in advance during the horizontal blank period before the next scanning cycle begins. By completing detection beforehand, the system avoids interference with the main display scanning process and prevents visible artifacts during normal operation.
2Object-affected harmful factors
If horizontal blank time is used for mobility detection and compensation, then detection can be completed without affecting display image quality, but display performance is reduced due to lost time
Solution Approach 1:
The patent utilizes the existing horizontal blank period to serve dual purposes: both display timing and mobility detection. The horizontal blank time, which would otherwise be unused, is repurposed to accommodate random line detection and compensation, making the system self-sufficient without requiring additional time resources.
Solution Approach 2:
The horizontal blank period is designed to perform multiple functions simultaneously: maintaining display timing synchronization, enabling random line selection for detection, and completing mobility compensation. This multi-functional approach eliminates the need for separate detection time and improves overall system efficiency.
3Object-affected harmful factors
If random line selection function is added to GOA circuit, then mobility detection and compensation can be performed during horizontal blank period, but device complexity increases
Solution Approach 1:
The patent integrates the random location module with existing GOA circuit components rather than adding completely separate detection hardware. The random location module shares timing signals and control logic with the conventional GOA structure, merging detection functionality into the existing scanning architecture to minimize additional complexity.
Solution Approach 2:
The random location module acts as an intermediary component that bridges the display timing system and the mobility detection system. It receives timing signals from the GOA circuit and generates appropriate detection commands, serving as a mediator that coordinates between existing display functionality and new detection requirements without requiring direct integration of all components.
Data Source
AI summary
The present application provides a GOA circuit and a display panel. The GOA circuit includes a plurality of cascaded GOA units. Every GOA unit includes a pull-up control module, a pull-up output module, a pull-down control module, a pull-down output module, a pull-down maintenance module, and a random location module. By adding the random location module in the GOA unit, the GOA circuit has a function of randomly selecting rows and outputting scanning signals, so as to realize a purpose of randomly selecting rows for mobility detection and compensation.