LCD Panel Data Line Arrangement for 1+2 Dot Inversion Power Reduction
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Solution Overview
Problem
Frequent polarity switching on data lines in LCD panels driven by 1+2 dot inversion methods increases power consumption and results in resource wastage.
Innovation Solution
The LCD panel design includes a specific arrangement of data lines and scan lines, where pixel units coupled to an identical data line are connected to different scan lines, allowing for 1+2 dot inversion without continuous polarity switching on the data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 1+2 dot inversion driving method is employed to reverse liquid crystal molecules periodically, then the liquid crystal molecule characteristics are preserved and display quality is maintained, but the data lines must frequently switch polarity which increases power consumption and causes resource waste
Solution Approach 1:
The patent divides the display panel into multiple pixel units with different scanning frequencies. Specifically, it segments the pixel units into first pixel units scanned at a first scanning frequency and second pixel units scanned at a second scanning frequency (which is a multiple of the first frequency). This segmentation allows different regions to use different driving schemes, enabling the first pixel units to perform polarity reversal for liquid crystal molecule maintenance while the second pixel units can maintain constant polarity, thereby reducing overall power consumption while preserving display quality in critical regions
Solution Approach 2:
The patent applies different driving characteristics to different spatial locations of the display panel. By assigning different scanning frequencies and polarity switching patterns to different pixel unit groups based on their positional characteristics, the system optimizes power consumption locally while ensuring display quality where needed. This local differentiation resolves the contradiction by allowing polarity reversal only where necessary rather than uniformly across the entire panel
2Manufacturing precision
If 1+2 dot inversion is used to achieve uniform display quality across all pixel units, then display consistency is improved, but continuous polarity switching on data lines increases power consumption and reduces efficiency
Solution Approach 1:
The patent introduces dynamic scanning frequencies for different pixel units. The first pixel units are scanned at a first scanning frequency while the second pixel units are scanned at a second scanning frequency (a multiple of the first). This dynamic differentiation allows the system to maintain display quality uniformity in regions requiring it while reducing power consumption in regions that can tolerate different characteristics, thereby resolving the contradiction between uniformity and energy efficiency
Solution Approach 2:
The patent employs periodic polarity reversal at different time intervals for different pixel units. The first pixel units undergo polarity reversal at the first scanning frequency while the second pixel units operate at the second scanning frequency. This periodic action with varying periods allows maintenance of liquid crystal molecule characteristics where needed while minimizing unnecessary polarity switching elsewhere, thus reducing power waste while maintaining required display quality
Data Source
AI summary
An LCD panel includes first to fifth data lines, which are sequentially arranged, intersecting first to third scan lines, which are sequentially arranged, for forming first to fourth pixel units sequentially arranged in an identical row as well as fifth to eighth pixel units sequentially arranged in another row. The first pixel unit and the fourth pixel unit are respectively coupled to the first data line and the fifth data line, and the second pixel unit and the third pixel unit are respectively coupled to the second data line and the fourth data line. The fifth pixel unit and the eighth pixel unit are respectively coupled to the second data line and the fourth data line, and both the sixth pixel unit and the seventh pixel unit are coupled to the third data line.