OLED Display Panel Gate Line Sharing for Narrow Bezel
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Solution Overview
Problem
In OLED display technology, the existing gate driving circuits require a large area to accommodate the necessary transistors for outputting scan and sensing driving signals, making it difficult to achieve high resolution and narrow bezel displays due to increased bezel size and transistor output capability requirements.
Innovation Solution
The display panel design includes a gate line group and a sub-pixel unit group, where each sub-pixel unit has a light emitting unit and a sensing circuit, with the gate driving circuit outputting gate scanning signals sequentially through a reduced number of output terminals, allowing the sensing circuit in one row to share a gate line with the pixel driving circuit in the next row, reducing the number of gate lines and output terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gate driving circuit uses separate gate lines for pixel driving and sensing operations, then the reliability of signal transmission is improved, but the number of gate lines and output terminals increases, leading to larger bezel size
Solution Approach 1:
The patent merges the gate lines for pixel driving and sensing operations into a shared gate line structure. Specifically, the sensing circuit in the n-th row shares the (n+1)-th gate line with the pixel driving circuit in the (n+1)-th row, reducing the total number of gate lines from 2N to N+1 while maintaining reliable signal transmission through sequential operation control
Solution Approach 2:
The gate driving circuit achieves multi-functionality by using the same gate line for dual purposes: driving pixel circuits during display phases and driving sensing circuits during sensing phases. The gate driving circuit outputs different signals sequentially to the same gate line, enabling one gate line to serve multiple functions without compromising signal reliability
2Measurement precision
If the gate driving circuit outputs scan and sensing signals through separate output terminals, then the control precision of each signal is improved, but the number of output terminals increases, making it difficult to achieve narrow bezel displays
Solution Approach 1:
The patent combines multiple output terminal functions into a single output terminal. The gate driving circuit uses one output terminal to sequentially output both scan signals and sensing signals to the shared gate line, reducing the number of output terminals while maintaining precise control through sequential signal output and timing management
Solution Approach 2:
The gate driving circuit employs periodic action by outputting signals in sequential phases: first outputting scan signals during display phases, then outputting sensing signals during sensing phases. This periodic switching enables a single output terminal to maintain precise control over multiple signal types through time-division multiplexing
Data Source
AI summary
The present disclosure provides a display panel, a method thereof and a display device. The display panel includes a gate line group, a gate driving circuit, and a sub-pixel unit group. The sub-pixel unit group includes N rows of sub-pixel units, the gate line group includes (N+1) gate lines. The sub-pixel unit includes a light emitting unit, a pixel driving circuit, and a sensing circuit. The gate driving circuit includes output terminals, and is configured to sequentially output gate scanning signals through the output terminals. Each gate line is coupled to one corresponding output terminal. In the sub-pixel unit group, the pixel driving circuit in a sub-pixel unit in an n-th row is coupled to an n-th gate line; and the sensing circuit in the sub-pixel unit in the n-th row is coupled to a (n+1)-th gate line, where 1≤n≤N, and n is an integer.