Scan Driver Selective Progressive Interlaced Scanning
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Solution Overview
Problem
Conventional flat panel displays (FPDs) lack a scan driver capable of selectively performing progressive scanning and interlaced scanning, limiting their display capabilities.
Innovation Solution
A scan driver is designed with a shift register, odd and even line selection units, and a mode selection unit to generate scan signals for both progressive and interlaced scanning by controlling flip-flops and NAND gates based on clock signals and control signals, allowing for flexible scanning modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional scan driver is used, then the display can perform either progressive scanning or interlaced scanning, but the display cannot selectively switch between scanning modes
Solution Approach 1:
The scan driver is designed to perform multiple functions by integrating both progressive scanning and interlaced scanning capabilities into a single device. The driver includes mode selection means that can switch between progressive scan mode (where all lines are scanned sequentially in one frame period) and interlaced scan mode (where odd lines and even lines are scanned in separate field periods), allowing the display to adapt to different scanning requirements without requiring separate drivers for each mode.
Solution Approach 2:
The scan driver incorporates dynamic switching capability through mode selection means that can change the scanning mode based on control signals. The driver dynamically adjusts its operation by switching between progressive and interlaced scanning modes, allowing the display system to adapt to different content requirements, resolution needs, and refresh rate demands without physical reconfiguration.
2Reliability
If separate scan drivers are used for progressive scanning and interlaced scanning, then mode-specific optimization is achieved, but the overall system complexity increases
Solution Approach 1:
The invention merges the functionality of separate progressive scan drivers and interlaced scan drivers into a single unified scan driver. The driver includes integrated circuitry that can handle both scanning modes, with mode selection means that routes control signals appropriately to achieve the desired scanning pattern. This consolidation maintains the reliability and performance benefits of mode-specific optimization while reducing the total number of drivers required in the display system.
Data Source
AI summary
A scan driver that selectively performs progressive scanning and interlaced scanning and a display using the same. The scan driver includes a shift register having a plurality of flip-flops arranged in series, an odd line selection unit having a plurality of NAND gates, and an even line selection unit having a plurality of NAND gates. In response to an odd line control signal and an even line control signal input to the odd line selection unit and the even line selection unit, respectively, the scan driver performs progressive scanning or interlaced scanning. The scan driver may also include a mode selection unit to selectively perform progressive scanning or interlaced scanning in response to a mode selection signal.