GOA Circuit Detection via Dual Signal Lines
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Solution Overview
Problem
The existing methods for detecting defective Gate Driver On Array (GOA) units in Liquid Crystal Display (LCD) panels are inefficient and troublesome, requiring sequential connection to an oscilloscope to assess waveform abnormalities.
Innovation Solution
A gate driving circuit with cascaded units connected to first and second signal lines, allowing for simultaneous detection of output signals from odd and even stages via separate lines, facilitating connection to an oscilloscope without breaking the display apparatus, using transistors to manage signal lines and reduce manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If GOA units are connected to oscilloscope sequentially for detection, then detection can be performed, but detection efficiency is low and operation is troublesome
Solution Approach 1:
The detection system is segmented into multiple independent signal lines (first signal line for odd stages, second signal line for even stages), allowing parallel detection of multiple GOA units simultaneously rather than sequential connection to a single oscilloscope
Solution Approach 2:
The access units are designed with multi-functionality, serving both as signal routing elements for the gate driving circuit operation and as detection access points for connecting to signal lines, eliminating the need for separate detection connections
2Productivity
If multiple signal lines are added for simultaneous detection, then detection efficiency improves, but device complexity increases
Solution Approach 1:
The access units are merged into the existing gate driving circuit structure, where the same transistors and nodes used for circuit operation also serve as access points for detection signal lines, avoiding the addition of separate dedicated detection components
Solution Approach 2:
The signal lines and access units serve dual purposes: they are part of the normal gate driving circuit operation and simultaneously enable detection functionality, reducing the need for additional dedicated detection infrastructure
Data Source
AI summary
The present disclosure provides a gate driving circuit, a method for detecting the gate driving circuit, an array substrate and a display apparatus. The gate driving circuit comprises a plurality of cascaded gate driving units, access units, a first signal line and a second signal line. Each access unit is connected to its corresponding gate driving unit and the gate driving unit at the next stage to its corresponding gate driving unit. The access unit corresponding to the gate driving unit at each odd stage is connected to the first signal line such that the first signal line detects an output signal from that gate driving unit via the access unit, and the access unit corresponding to the gate driving unit at each even stage is connected to the second signal line such that the second signal line detects an output signal from that gate driving unit via the access unit.