Pixel Circuit Scan Signal Multiplexing for GIP Border Reduction
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Solution Overview
Problem
The complexity of the Gate Driver Integrated Circuit (GIP) structure in display panels results in a large border, making it difficult to efficiently drive light-emitting elements and requiring multiple scan signals, which complicates the circuit design and increases panel width.
Innovation Solution
A pixel circuit with a drive module, a first initialization module, and a data write module, controlled by specific scan signals, allows for threshold voltage compensation and multiplexing of scan signals, simplifying the GIP circuit structure and reducing the display panel border by using a single group of GIP circuits for scan signal output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple scan signals are provided to drive the pixel circuit, then the light-emitting element can be driven stably, but the GIP circuit structure becomes complicated and the border width increases
Solution Approach 1:
The pixel circuit is designed to perform multiple functions using a single scan signal: it can be initialized (first initialization), have data written (data write), and undergo threshold voltage compensation, all controlled by the same scan signal. This multi-functional design eliminates the need for separate scan signals for each operation, simplifying the GIP circuit structure while maintaining reliable operation
Solution Approach 2:
The patent combines the initialization function and data write function into a single unified process controlled by one scan signal. The first initialization module and data write module share the same control timing, merging what were previously separate operations into one integrated function, thereby reducing the number of scan signals required
2Manufacturing precision
If multiple scan signals are used for initialization and data writing, then threshold voltage compensation can be achieved, but the border width of the display panel increases
Solution Approach 1:
The single scan signal is designed to control multiple functions including initialization, data writing, and threshold voltage compensation. By making the scan signal universal and multi-functional, the patent achieves precise threshold voltage compensation without requiring additional dedicated scan signals, thus avoiding increased border width
Solution Approach 2:
The scan signal operates in periodic cycles, with specific time windows allocated for different functions: initialization phase, data write phase, and compensation phase. This periodic structure allows the single scan signal to systematically perform multiple operations in sequence, achieving threshold voltage compensation without requiring parallel multiple scan signals that would increase border width
Data Source
AI summary
A pixel circuit, a driving method thereof, and a display panel. The pixel circuit includes a drive module, a first initialization module and a data write module. The drive module is configured to generate, in response to a data signal, a drive current to drive a light-emitting element to emit light. The first initialization module is controlled by a first scan signal and a second scan signal and is configured to initialize a control terminal of the drive module when the first scan signal and the second scan signal are active. The data write module is controlled by a third scan signal, where the first initialization module is configured to cooperate with the data write module to write the data signal into the control terminal of the drive module when the second scan signal and the third scan signal are active.