Bidirectional Scanning Pixel Circuit for Self-Luminous Displays
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Solution Overview
Problem
Existing pixel circuits in self-luminous display devices are limited by their structure and cannot realize compatibility for both forward and reverse scanning by the scanning driving circuit, allowing only forward scanning from the first row to the N-th row but not reverse scanning from the N-th row to the first row.
Innovation Solution
The proposed pixel circuit includes a driving transistor, input modules, connection modules, a light emitting control module, and a storage capacitor, allowing for the transmission of reset and data signals in both forward and reverse scanning phases through different connection paths, thereby enabling compatibility for both scanning directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pixel circuit structure is designed for forward scanning only, then the circuit can be simplified and easier to manufacture, but it cannot support reverse scanning operation
Solution Approach 1:
The pixel circuit is designed with dual input modules (first input module and second input module) that can both receive reset signals and data signals, allowing the same circuit structure to support both forward scanning and reverse scanning operations. The first connection module and second connection module are configured to connect input terminals to the gate terminal based on scanning direction, enabling universal functionality across different scanning modes without requiring separate circuits for each direction.
Solution Approach 2:
The pixel circuit employs dynamic switching between different connection paths through the first connection module and second connection module. Depending on the scanning direction (forward or reverse), different modules are activated to connect the appropriate input terminals to the gate terminal. This dynamic reconfiguration allows the circuit to adapt its connectivity based on operational requirements, enabling bidirectional scanning support.
2Adaptability or versatility
If separate connection paths are added for reverse scanning, then bidirectional scanning compatibility is achieved, but the circuit complexity increases
Solution Approach 1:
The first input module and second input module are merged into a unified pixel circuit structure that handles both forward and reverse scanning functions. Instead of creating completely separate circuits for each scanning direction, the design combines multiple functions into shared components. The first connection module and second connection module work together within the same circuit framework, merging the complexity of bidirectional support into an integrated design rather than separate systems.
Data Source
AI summary
Pixel circuit, driving method thereof and display device are provided. The pixel circuit includes a driving transistor, a first input module, a second input module, a first connection module, a second connection module, a light emitting control module, and a storage capacitor. The first input module is configured to transmit a first input signal to a first terminal of the driving transistor. The second input module is configured to transmit a second input signal to a second terminal of the driving transistor. The first connection module is configured to connect a first terminal of the driving transistor to a gate of the driving transistor. The second connection module is configured to connect a second terminal of the driving transistor to the gate of the driving transistor. The light emitting control module is configured to transmit a driving signal generated by the driving transistor to a light emitting element.