Liquid Crystal Display Parallel Signal Writing
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Solution Overview
Problem
Liquid crystal display devices using the field-sequential method have complex pixel configurations due to the need for additional transistors and signal lines, which complicates image signal writing and display processes.
Innovation Solution
A liquid crystal display device with a simplified pixel configuration where image signal writing is performed sequentially across rows, rather than row by row, allowing for parallel image signal writing and backlight lighting across unit regions, reducing the complexity by using a scan line driver circuit and signal line driver circuit to manage pulse outputs and image signals efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional transistors and signal lines are provided for parallel image signal writing and display, then productivity is improved, but device complexity increases
Solution Approach 1:
The pixel array is divided into multiple banks (first bank and second bank), allowing independent scanning and display operations in each bank. This segmentation enables parallel processing of image signals for different regions while maintaining a relatively simple pixel structure within each bank.
Solution Approach 2:
The patent introduces a bank selection signal dimension in addition to the row and column scanning dimensions. By adding this fourth dimension (bank selection), the system achieves parallel display capabilities without requiring additional transistors or signal lines within each pixel, thus improving productivity while controlling device complexity.
2Device complexity
If image signal writing is performed sequentially across rows, then device complexity is reduced, but productivity decreases
Solution Approach 1:
The display period is divided into multiple scanning periods, with each scanning period dedicated to scanning a specific bank. This time-based segmentation allows the system to maintain simple sequential scanning within each bank while achieving parallel display across multiple banks, thus balancing device complexity and productivity.
Solution Approach 2:
The patent employs periodic scanning across different banks, where each bank is scanned in alternating periods. This periodic action enables the system to display multiple images simultaneously by cycling through different banks in a systematic manner, maintaining simple pixel configuration while improving overall display productivity.
Data Source
AI summary
A liquid crystal display device capable of performing image signal writing and display with a field-sequential method in parallel, with a simple pixel configuration. In the liquid crystal display device, image signal writing to pixels in a row can be followed by image signal writing to pixels in a row which is separate from the row by at least two rows. Therefore, in the liquid crystal display device, image signal writing and lighting of the backlights are not performed per pixel portion but can be performed per unit region of the pixel portion. Accordingly, image signal writing and lighting of the backlight can be performed in parallel in the liquid crystal display device.